From sclaussen at stanford.edu Wed Feb 1 09:04:11 2012 From: sclaussen at stanford.edu (Stephanie Claussen) Date: Wed, 1 Feb 2012 09:04:11 -0800 Subject: EE Ph.D. Oral Examination: Stephanie Claussen, Feb. 10 at 1:00 pm Message-ID: Stanford University Ph.D. Oral Examination ? Department of Electrical Engineering Speaker: Stephanie Claussen Advisor: Professor David A. B. Miller Date: Friday, February 10, 2012 Time: 1:00 pm (refreshments at 12:45 pm) Location: Allen-X Auditorium (formerly CIS-X Auditorium) - Room 101 Title: High-performance Ge/SiGe quantum well waveguide modulators for optical interconnect systems Abstract: Electrical interconnects are rapidly nearing fundamental density-related and energy consumption limitations. Scaling a wire down in size does not allow it to carry more information, and the associated power consumption is becoming environmentally-significant. Optical interconnects provide a promising solution, but require CMOS-compatible, high-speed, low-energy optical components in order to be feasible. Ge/SiGe quantum wells (QWs) exhibit the quantum-confined Stark effect, a strong electroabsorption mechanism that enables compact optical modulators for use in future optical interconnect systems. To design and optimize high-performance modulators, we have experimentally investigated the ultrafast carrier dynamics and transport properties of Ge/SiGe QWs. We discuss the implications of these measured femtosecond carrier lifetimes on the ultimate performance limitations of these devices. We will then present recent progress toward achieving Ge/SiGe QW modulators integrated with low-loss silicon-on-insulator (SOI) waveguides. Waveguide modulators enable easy integration with other interconnect components and potentially high modulation contrast ratios. However, integration with SOI waveguides requires controllable selective-area epitaxial growth of the QW material. In this talk, we show demonstrations of high-quality selective-area growth of Ge and SiGe and discuss our advancements in the fabrication of Ge/SiGe QW waveguide modulators. -------------- next part -------------- An HTML attachment was scrubbed... URL: From cmcg at stanford.edu Wed Feb 1 09:18:00 2012 From: cmcg at stanford.edu (Chris McGuinness) Date: Wed, 1 Feb 2012 09:18:00 -0800 (PST) Subject: lost USB key, tiny purple one Message-ID: <207613523.205937.1328116680186.JavaMail.root@zm10.stanford.edu> If you see it let me know. Its one of those really tiny ones that can fit in your wallet. Last seen over by the computer with LEdit, though could have been dropped anywhere... Cheers, Chris From jwc at snf.stanford.edu Wed Feb 1 13:35:15 2012 From: jwc at snf.stanford.edu (James W. Conway) Date: Wed, 01 Feb 2012 13:35:15 -0800 Subject: Final Program and Invitation to Raith / Stanford Advanced Lithography Workshop - February 15, 2012 Message-ID: <4F29B013.403@snf.stanford.edu> An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ProfileLogo.gif Type: image/gif Size: 820 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: SpLogo Type: image/gif Size: 1513 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: FwdFriend Type: image/gif Size: 434 bytes Desc: not available URL: From mtang at stanford.edu Thu Feb 2 12:50:00 2012 From: mtang at stanford.edu (Mary Tang) Date: Thu, 02 Feb 2012 12:50:00 -0800 Subject: Renovation Update Message-ID: <4F2AF6F8.1020909@stanford.edu> Hello all -- Inquiring minds really want to know, but I'm afraid we still do not yet have a definite lab opening date. Please be assured, progress is very good and inspections are mostly done. The lab is now officially no longer a construction zone, so SNF staff were allowed back into the lab yesterday (yay!) Note that this is ONE WEEK AHEAD of the schedule posted in December. A lot of whining from us persuaded the project managers to work hard to bring in the date. Many thanks and kudos to the excellent construction team who worked extra shifts and weekends to make it happen. There are still, however, a number of to-be-resolved issues. Most are unrelated to the original renovation; they nonetheless prevent the lab from opening, just yet. Permit inspections highlighted code compliance issues (who knew there's an ADA requirement that all flashing emergency beacons, i.e., fire and TGO alarms, be synched?) And some renovation tasks triggered other upgrade projects. In short, there will continue to be planned interruptions in building-wide facilities over the next several days (namely, process cooling water, compressed air and nitrogen, as well as local facilities testing/validation for the new building control system). This weekend, there will be another round of professional cleaning, a best-practices 24-hour "rest time", and then recertification of the cleanroom Monday. The SNF staff plans to make as much use of this time as possible. There was a lot more involved in this shutdown than in our regular annual routine so will take more time than usual to recover. The maintenance crew is cautiously turning tools on. Process staff is decontaminating. Everyone is helping move the portable tools back into the lab and setting them up again. However, until we are done with the rolling facilities blackouts, we won't be able to fully turn on and test tools. Please be aware that the cleanroom remains off-limits and closed for all except relevant personnel. Everyone is welcome to view the lab from the outside (although if all has gone well, you shouldn't see any significant changes.) But if you'd like to look at it from the inside, there is only one way: volunteers are welcome to help with decontamination and wipe downs - though you must accompany a staff member as there are "dirty zones" and ongoing repair and project work that must not be disrupted. Please also be aware that last phase of the renovation, the Nanosynthesis Lab, is just starting. This means that the hall area outside the gowning room, just beyond the Receiving area corridor, remains a construction zone and therefore is off limits to all except construction crews. Make sure to observe the red tape and signs. Many thanks for your patience -- we are all very excited about the renovated lab (you would not believe how quiet the lab is with the new HEPAs!) and will continue to keep you posted as we get nearer to bringing up the lab. Your SNF Staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From jwc at snf.stanford.edu Thu Feb 2 17:27:01 2012 From: jwc at snf.stanford.edu (James W. Conway) Date: Thu, 02 Feb 2012 17:27:01 -0800 Subject: FINAL PROGRAM- Invitation to Raith / Stanford Advanced Lithography Workshop - February 15, 2012 Message-ID: <4F2B37E5.2030002@snf.stanford.edu> An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ProfileLogo.gif Type: image/gif Size: 820 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: SpLogo Type: image/gif Size: 1513 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: FwdFriend Type: image/gif Size: 434 bytes Desc: not available URL: From rthowe at stanford.edu Fri Feb 3 08:27:17 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Fri, 03 Feb 2012 08:27:17 -0800 Subject: contest for new SNF logo Message-ID: <4F2C0AE5.7070108@stanford.edu> Dear SNF Labmembers, As we all eagerly await the re-opening of the SNF and the installation, permitting, and release this spring of the three new PlasmaTherm dry etchers, the new Oxford III-V etcher, the 2nd Centura epi chamber, our 2nd Fiji PE-ALD, and our 2nd Savannah (to be operated in a glovebox for molecular vapor deposition), I'd like to invite you to participate in a competition for a new logo for the SNF. Our current logo (see the website to check it out) dates to the beginning of NNUN in the mid-1990s. All with artistic talent, or without it for that matter, are invited to design a new logo over the next two weeks. This email is going to the labmember community, but we'd like to open it to your friends, as well. The deadline is 5:00 pm, Pacific Time, Friday, February 17. Please send it in .gif, .jpg, or .pdf format. A committee consisting of the senior SNF staff and I will select the winner. The prize: a Kindle Fire. Thanks, Roger Howe From robert.chen at stanford.edu Fri Feb 3 15:20:06 2012 From: robert.chen at stanford.edu (Robert Chen) Date: Fri, 3 Feb 2012 15:20:06 -0800 Subject: Anyone Ever Purchased from SWI? Message-ID: Hi Labmembers, Does anyone have any experience purchasing wafers from SWI (Semiconductor Wafer, Inc.) out of Taiwan? http://semiwafer.com Thanks, Robert Chen Electrical Engineering Ph.D. Candidate Harris MBE Group, Stanford University http://robochen.web.stanford.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From phani at stanford.edu Mon Feb 6 09:52:54 2012 From: phani at stanford.edu (Naga Phani Aetukuri) Date: Mon, 06 Feb 2012 09:52:54 -0800 Subject: [Reminder] MSE PhD Dissertation Defense: Naga Phani Aetukuri - Today 3pm CIS-X 101 Message-ID: <4F301376.1000903@stanford.edu> An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Naga Phani Aetukuri_PhD_Thesis_abstract_6Feb2012.pdf Type: application/pdf Size: 15270 bytes Desc: not available URL: From mkkim10 at stanford.edu Tue Feb 7 12:26:06 2012 From: mkkim10 at stanford.edu (Minkyu Kim) Date: Tue, 7 Feb 2012 12:26:06 -0800 (PST) Subject: Asking heat press machine In-Reply-To: <1522337909.7590802.1328646197215.JavaMail.root@zm01.stanford.edu> Message-ID: <461344264.7626195.1328646366876.JavaMail.root@zm01.stanford.edu> Dear snf labmembers, I am wondering where I can use a heat press machine around here at Stanford. I am trying to bond two PMMA beams and temperature and pressure control is very important. If you have used it, please let me know. Thanks, From cmcg at stanford.edu Tue Feb 7 12:50:00 2012 From: cmcg at stanford.edu (Chris McGuinness) Date: Tue, 7 Feb 2012 12:50:00 -0800 (PST) Subject: where can I get big wafers? In-Reply-To: <417603699.1775792.1328647721864.JavaMail.root@zm10.stanford.edu> Message-ID: <315295024.1779866.1328647800398.JavaMail.root@zm10.stanford.edu> Hi all, I'm wondering what the largest commercially available wafers are and where I can order them? By large I am referring to diameter. Thanks, Chris From mtang at stanford.edu Tue Feb 7 12:58:06 2012 From: mtang at stanford.edu (Mary Tang) Date: Tue, 07 Feb 2012 12:58:06 -0800 Subject: Renovation Update: Lab reopening Message-ID: <4F31905E.207@stanford.edu> Hello all -- Progress! Renovation tasks continue. The main Issue is with the process cooling water which has turned out to be more extensive than expected (through no fault of our awesome renovation team -- in fact, they uncovered some undocumented modifications that would have left us without backup.) So, there will be two all-day shutdowns of the cooling water planned for tomorrow and Friday this week, in addition to the other smaller tasks. There will also be a one-day shutdown of the building nitrogen. In between utility shutdowns, the maintenance staff continues to turn on and assess/address equipment issues where they can. With this as the plan of record, we believe we should be able to reopen the lab some time next week. We should have a more specific day/time in the next couple of days. In the meantime, the lab remains closed to all except relevant personnel. Volunteers are welcome to help us with moving small tools and tables, as well as wiping down and decontaminating surfaces -- check with Staff. Please also do not cross red tape barriers in the hall outside the gowning room, as the crew begins construction of the nano- Surfaces & Interfaces Lab (nSiL, formerly referred to as the Nanosynthesis Lab). Thanks for your patience -- Your SNF Staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From steelxu at stanford.edu Wed Feb 8 12:26:03 2012 From: steelxu at stanford.edu (Xiaoqing Xu) Date: Wed, 8 Feb 2012 12:26:03 -0800 (PST) Subject: who moves away the computer desk in 213XB In-Reply-To: <369965178.4829554.1328732092924.JavaMail.root@zm03.stanford.edu> Message-ID: <395595672.4853852.1328732763203.JavaMail.root@zm03.stanford.edu> Hello Labmembers, Does anyone move away the small black computer desk in 213XB? I bought it two weeks ago, for convenience of the users in doing experiments. I saw it yesterday, but can not find it any more. If anyone moves it away, please move it back. Thanks a lot! Xiaoqing From kennygee at stanford.edu Wed Feb 8 12:35:59 2012 From: kennygee at stanford.edu (Kenny Green) Date: Wed, 8 Feb 2012 12:35:59 -0800 Subject: who moves away the computer desk in 213XB In-Reply-To: <395595672.4853852.1328732763203.JavaMail.root@zm03.stanford.edu> References: <395595672.4853852.1328732763203.JavaMail.root@zm03.stanford.edu> Message-ID: <4AF2041D-110A-4C6E-A261-CD3C7916F706@stanford.edu> Xiaoqing, I moved it, and I just returned it. It was moved to the corridor when the custodians were removing the water from the floor in the lab this morning. Kenny Sent from my iPhone On Feb 8, 2012, at 12:26 PM, Xiaoqing Xu wrote: > Hello Labmembers, > Does anyone move away the small black computer desk in 213XB? I bought it two weeks ago, for convenience of the users in doing experiments. I saw it yesterday, but can not find it any more. If anyone moves it away, please move it back. > Thanks a lot! > Xiaoqing From edmyers at stanford.edu Wed Feb 8 14:56:36 2012 From: edmyers at stanford.edu (Ed Myers) Date: Wed, 08 Feb 2012 14:56:36 -0800 Subject: Gryphon Sputter Retirement Message-ID: <4F32FDA4.90401@stanford.edu> All, Time has come to retire another tool from it's long term SNF service. With the influx of new tools and the characterization of the Intlvac_sputter, it's time for the Gryphon metal system to vacate it's space. The Gryphon is being removed from the SNF fab during the renovation shut-down. The three new PlasmaTherm etchers will be delivered on Wednesday, Feb. 15th. Two of these etchers (the metal and dielectric etchers) will be located in the space vacated by the Gryphon and the old SCT location. Depositions which have been done in the Gryphon need to be moved to one of the Intlvac metal systems. The Intlvac_sputter is configured with an ion source for pre-sputter etch (etch rates >90 Ang/min) and dual AC depositions (deposition rates of 1 micron/min for Al). The system is not load lock, so the pumpdown to base is longer taking approximately 2 hours. The wafer carrier is designed to fit 4, four inch wafers (pieces are allowed) but the wafers are not thermally heat sinked. Depositions of pure Al at 1 micron/min have displayed more surface roughness than what was observed in the Gryphon. The Intlvac_sputter characterization report will soon be posted on the lab members Wiki. If you have any questions regarding the Intlvac systems please contact Ed Myers. Regards, SNF Staff From xixie54 at stanford.edu Wed Feb 8 15:00:51 2012 From: xixie54 at stanford.edu (Xi Xie) Date: Wed, 8 Feb 2012 15:00:51 -0800 (PST) Subject: waveform amplifier In-Reply-To: <2123976466.3639817.1328741891268.JavaMail.root@zm06.stanford.edu> Message-ID: <1632455244.3642430.1328742051270.JavaMail.root@zm06.stanford.edu> Hi all, I need a waveform amplifier to amplify the voltage of function generator to about 20V (1 kHz is enough). Does any lab have a waveform amplifier that I can borrow for couple of hours? I want to check whether it works for my experiment and if so we will buy our own. Thanks! Best, Xi From pradeep.nataraj at gmail.com Wed Feb 8 16:51:02 2012 From: pradeep.nataraj at gmail.com (Pradeep Nataraj) Date: Wed, 8 Feb 2012 16:51:02 -0800 Subject: Gryphon Sputter Retirement In-Reply-To: <4F32FDA4.90401@stanford.edu> References: <4F32FDA4.90401@stanford.edu> Message-ID: Dear Ed, I understand the need for to retire the beloved Gryphon for many reasons. As of my knowledge, that the Intlvac is not fully functional yet or is it completely characterized? Do we have a good understanding and confidence on Intlvac like we do on gryphon? I know Maurice and Jim have spent lot of time on the tool, and the good part is that, they know the Gryphon very well. I am not very keen on retiring the tool for good. As of my understanding you can only load max of 2 to 3 wafers in Intlvac ( I am guessing) with the pump down of 2 hrs. Gryphon is way faster than that, and handles up to 14 wafers. It is sad to loose the tool that, we know works well when it is working and most importantly staff has spent lot of time on it and they know how to fix it. I don't know like the idea of getting rid of Gryphon for good. But that's just me ! I know space is a big issue in the lab, can we some how find a place for it ( how about outside?) I also want to make sure that the Intlvac should be fully functional, before you retire the Gryphon. The lab members have no other semi clean metal tool that, they can use other than Gryphon. Please lab member's and staff let us know your feedback! Thank you, Pradeep On Wed, Feb 8, 2012 at 2:56 PM, Ed Myers wrote: > All, > > Time has come to retire another tool from it's long term SNF service. ?With > the influx of new tools and the characterization of the Intlvac_sputter, > it's time for the Gryphon metal system to vacate it's space. ?The Gryphon is > being removed from the SNF fab during the renovation shut-down. ?The three > new PlasmaTherm etchers will be delivered on Wednesday, Feb. 15th. ?Two of > these etchers (the metal and dielectric etchers) will be located in the > space vacated by the Gryphon and the old SCT location. > > Depositions which have been done in the Gryphon need to be moved to one of > the Intlvac metal systems. ?The Intlvac_sputter is configured with an ion > source for pre-sputter etch (etch rates >90 Ang/min) and dual AC depositions > (deposition rates of 1 micron/min for Al). ?The system is not load lock, so > the pumpdown to base is longer taking approximately 2 hours. ?The wafer > carrier is designed to fit 4, four inch wafers (pieces are allowed) but the > wafers are not thermally heat sinked. ?Depositions of pure Al at 1 > micron/min have displayed more surface roughness than what was observed in > the Gryphon. ?The Intlvac_sputter characterization report will soon be > posted on the lab members Wiki. > > If you have any questions regarding the Intlvac systems please contact Ed > Myers. > > Regards, > SNF Staff From jcdoll at stanford.edu Wed Feb 8 19:28:09 2012 From: jcdoll at stanford.edu (Joey Doll) Date: Wed, 8 Feb 2012 19:28:09 -0800 Subject: Soft cantilevers and air-water interfaces Message-ID: Hi Labmembers - I have some soft silicon cantilevers (e.g. 1 mN/m) that tend to break when removed from water. They can enter liquid without breaking, but upon exiting they get stuck at the air-water interface and either stick to the die or just snap off. Does anyone have any tips for safely removing soft cantilevers from liquid? Some of the devices are bare silicon while others are coated with parylene, and I've tested lower surface tension liquids (e.g. ethanol) and oxygen plasma to render the surface hydrophilic without much success. This is after the devices have exited the SNF and CPD isn't an option. Any suggestions/thoughts you have would be much appreciated. Thanks! Joey From sclaussen at stanford.edu Fri Feb 10 09:28:14 2012 From: sclaussen at stanford.edu (Stephanie Claussen) Date: Fri, 10 Feb 2012 09:28:14 -0800 Subject: [Reminder] TODAY- EE Ph.D. Oral Examination: Stephanie Claussen, Feb. 10 at 1:00 pm Message-ID: Stanford University Oral Examination ? Department of Electrical Engineering Speaker: Stephanie Claussen Advisor: Professor David A. B. Miller Date: Friday, February 10, 2012 Time: 1:00 pm (refreshments at 12:45 pm) Location: Allen-X Auditorium (formerly CIS-X Auditorium) - Room 101 Title: High-performance Ge/SiGe quantum well waveguide modulators for optical interconnect systems Abstract: Electrical interconnects are rapidly nearing fundamental density-related and energy consumption limitations. Scaling a wire down in size does not allow it to carry more information, and the associated power consumption is becoming environmentally-significant. Optical interconnects provide a promising solution, but require CMOS-compatible, high-speed, low-energy optical components in order to be feasible. Ge/SiGe quantum wells (QWs) exhibit the quantum-confined Stark effect, a strong electroabsorption mechanism that enables compact optical modulators for use in future optical interconnect systems. To design and optimize high-performance modulators, we have experimentally investigated the ultrafast carrier dynamics and transport properties of Ge/SiGe QWs. We discuss the implications of these measured femtosecond carrier lifetimes on the ultimate performance limitations of these devices. We will then present recent progress toward achieving Ge/SiGe QW modulators integrated with low-loss silicon-on-insulator (SOI) waveguides. Waveguide modulators enable easy integration with other interconnect components and potentially high modulation contrast ratios. However, integration with SOI waveguides requires controllable selective-area epitaxial growth of the QW material. In this talk, we show demonstrations of high-quality selective-area growth of Ge and SiGe and discuss our advancements in the fabrication of Ge/SiGe QW waveguide modulators. -------------- next part -------------- An HTML attachment was scrubbed... URL: From josep at stanford.edu Fri Feb 10 10:37:41 2012 From: josep at stanford.edu (Jose Padovani) Date: Fri, 10 Feb 2012 10:37:41 -0800 Subject: Seminar: Adam de la Zerda, "Imaging Cancer Biomolecules using Light, Sound and Bio-orthogonal Chemistry", Monday Feb 14 4PM Allen 101X Message-ID: Hi all, Please plan on attending this interesting seminar by Adam de la Zerda on dynamics of cancer-specific biomolecules using molecular imaging technologies. Who: Adam de la Zerda, PhD When: Tuesday, Feb 14 4:00-5:00 pm Where: Allen 101X Auditorium Title: Imaging Cancer Biomolecules using Light, Sound and Bio-orthogonal Chemistry Abstract: Many cancer-specific biomolecules are dynamic in space, time and local environments. Hence, in order to truly understand their role in cancer progression, it is important to visualize them in living subjects ? their most natural environment. In this talk, we introduce a number of new molecular imaging technologies as well as new chemistry that allows interrogation of many cancer biomarkers for the first time. We first introduce photoacoustic molecular imaging, a technology where short light pulses are converted into ultrasound waves by a contrast molecule. By measuring the ultrasound waves emanating from the body, one can create a detailed 3D image of contrast molecules that target cancer. Second we will introduce our current work on a novel chemistry approach for targeting cancer-specific glycans (sugars). Altered glycan patterns are a hallmark of cancer but are very difficult to image. We will present a novel chemistry method for labeling cell-surface glycans based on specific chemical reactions that are orthogonal to all other biological processes, hence, allowing very specific and sensitive detection. Profile: Dr. Adam de la Zerda will be joining the faculty of Structural Biology at Stanford Medical School in September 2012 as an Assistant Professor. In 2011 Dr. de la Zerda finished his PhD in Electrical Engineering at Stanford University, and is currently a postdoctoral fellow in Chemistry at UC Berkeley. He is working on the development of new molecular imaging technologies to visualize and interrogate various biomolecules in cancer. Dr. de la Zerda has received numerous awards for his research including the Damon Runyon Cancer Research Foundation Fellowship (2011), Era of Hope Distinguished Predoctoral Award (2011), Best Poster Presentation at SPIE Photonics West (2009), the Young Investigator Award at the World Molecular Imaging Congress (2008), the Department of Defense Breast Cancer Research Program Predoctoral Award (2008), and the Bio-X Graduate Student Fellowship (2008). He published over 13 papers in leading journals including Nature Nanotechnology, Nature Medicine, Nano Letters, and PNAS, some of which received significant press coverage from Forbes Magazine, US News and The Washington Post. He holds a number of patents and is the co-founder of a medical imaging device company, OcuBell Inc. He studied Computer Engineering at the Technion ? Israel Institute of Technology where he graduated with a B.Sc. Summa Cum Laude . Hope to see you all there. Jose -- Jose Padovani Graduate Student Electrical Engineering Department Stanford University (650) 796-1971 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Seminar.Adam.de.la.Zerda.Feb14.2012.pdf Type: application/pdf Size: 148975 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: From hsing at stanford.edu Fri Feb 10 14:03:28 2012 From: hsing at stanford.edu (Alex Hsing) Date: Fri, 10 Feb 2012 14:03:28 -0800 (PST) Subject: Cu plating In-Reply-To: <12785118.7484373.1328911274137.JavaMail.root@zm03.stanford.edu> Message-ID: <646772244.7488132.1328911408066.JavaMail.root@zm03.stanford.edu> Hi all, Does anyone have experience with Cu plating? Your advice would be much appreciated. Thanks, Alex Alexander Hsing Ph.D. Candidate Mobile: 310.560.6895 Department of Materials Science and Engineering 496 Lomita Mall, Durand Bldg., Rm. 111A Stanford University Stanford, CA 94305 From mtang at stanford.edu Fri Feb 10 17:01:06 2012 From: mtang at stanford.edu (Mary Tang) Date: Fri, 10 Feb 2012 17:01:06 -0800 Subject: Renovation Update/Tentative Lab Opening Date - Wed! Message-ID: <4F35BDD2.1090105@stanford.edu> Dear Labmembers -- Thanks for your patience. Things are really finally coming together. The contractors are done with the lab. However, work on some facilities continues. The Stanford Building services group is now tidying up loose ends. Today, the process cooling water, compressed air, and the scrubbers were down. Scrubbers will remain down through probably through Monday, which means no chemicals or other hazardous materials can be used. Monday, we will lose nitrogen for the building. This should be the last of the facilities shutdowns. Over the past 10 days, in between shutdowns, staff has been cautiously turning on tools and making repairs to those that didn't do well with the long shutdown. Staff have also been busy unpacking stored items, wiping every surface down, and preparing space for the new etchers due to arrive shortly. (MANY thanks to those labmembers who came in to help wipe, scrape, haul, and label!) However, because of the facilities shutdowns, there has been little opportunity to test the equipment so tool status is still largely uncertain.Tuesday, we hope we will be fully back online with facilities to continue with decontamination and systems testing. We're tentatively hoping to reopen the lab on *Wednesday morning, at 10 am*. This will allow the staff to meet in the morning to assess the lab and update Coral. Please make sure to check Coral for details on tool status as we do expect some critical tools to remain down and other tools to be functionally tested, but not process-qualified. This time and date may be subject to change -- we will let you know as soon as we do of any definite changes to the plan. James reports the Raith system has been fully tested and should be ready to use Tuesday. Please check Coral for status and check with James about using the system -- please be aware that support systems (coaters, for example) may not be available then. Lastly, the next phase of the renovation is beginning: the nSiL (Nano Structure Interfaces Lab). The corridor at the end of the hall is blocked off as a construction zone. Make sure to respect the barriers and signs. Your SNF Staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From sangwon at stanford.edu Sun Feb 12 08:38:33 2012 From: sangwon at stanford.edu (Sangwon Lee) Date: Sun, 12 Feb 2012 08:38:33 -0800 Subject: [Reminder] MSE PhD Dissertation Defense: Sangwon Lee (Tomorrow, 10am) Message-ID: > > > Department of Materials Science & Engineering > University PhD Dissertation Defense > > > Graphene: Synthesis, Structure & Properties > > > Sangwon Lee > Advisor: Prof. Alberto Salleo > > Date: Monday, February 13th, 2012 > Time: 10 am (Refreshments served at 9:45 am)** > > Location: Jerry Yang and Akiko Yamazaki Environment and Energy Building > (Y2E2) > > Conference room # 299 (Bechtel conference room) > > (http://campus-map.stanford.edu/index.cfm?ID=04-070) > > > > Abstract > > The discovery of free-standing graphene in 2004 has attracted wide > attention in both scientific communities and industries because of its > unusual electronic structure and properties. Due to the possible > applications of graphene, many attempts to produce high-quality wafer-scale > graphene films have been actively tried in the materials science and other > scientific communities. Thermal decomposition of silicon carbide (SiC) is > considered as one of the most promising routes toward the synthesis of > well-controlled and characterized graphene films. > > Since the argon (Ar) atmosphere produced higher quality graphene films on > SiC than in vacuum, the inert-gas mediated thermal decomposition of SiC is > regarded so far as the most effective method for the controlled epitaxial > graphene (EG) growth. Most studies and progresses have been demonstrated > with the Si-face of basal plane oriented SiC substrates because of its > slower reaction kinetics, which results from higher surface energy than the > C-face. Nevertheless, there is significant interest in obtaining > few-layer, smooth EG on the C-face of SiC due to its superior electrical > properties as compared to EG on the Si-face. The first part of the > presentation will focus on the structural properties of EG layers grown on > the C-face of 4H-SiC in vacuum or Ar environments by X-ray diffraction > using synchrotron radiation. The qualities and characteristics of layers > will be also correlated with carrier mobilities from Hall measurements. > > The high temperatures required in this method (~ 1400?C) are not > compatible with large-scale device integration where different materials > must be deposited and patterned prior to the formation of the semiconductor > layers and limit the synthesis to single-crystal SiC substrates. In the > second part of the presentation, an alternative low-temperature, spatially > controlled and scalable epitaxial graphene synthesis technique based on > laser-induced surface decomposition of SiC will be proposed. This technique > is compatible and amenable to large-scale device integration. Furthermore, > laser synthesis of graphene offers the advantage of combining synthesis and > patterning in one step as the process can be designed to form graphene > devices in predetermined locations on the substrate. Our results in this > research show that epitaxial graphene (EG) forms on SiC as a result of > laser irradiation. Various characterization techniques such as RHEED, > synchrotron-based X-ray diffraction, Raman, TEM and STM were used to > confirm the graphitization of SiC and to measure the properties of graphene > films. > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From hailin at stanford.edu Sun Feb 12 17:02:18 2012 From: hailin at stanford.edu (Hai Lin) Date: Sun, 12 Feb 2012 17:02:18 -0800 (PST) Subject: [Reminder] MSE PhD Oral Examination----Hai Lin, Thur. Feb 16, 10am, CIS-X Aud. In-Reply-To: <63939413.1122769.1328222507129.JavaMail.root@zm06.stanford.edu> Message-ID: <1560204801.7105439.1329094938829.JavaMail.root@zm06.stanford.edu> Title: Growth and Characterization of GeSn and SiGeSn Alloys for Optical Interconnects Speaker: Hai Lin, Department of Materials Science and Engineering Advisor: Prof. James. Harris Date: Thursday, February 16th 2012, 10AM (Refreshments at 9:45AM) Location: CIS-X 101 Allen Auditorium (http://cis.stanford.edu/directions/) Abstract: As the device size scales down, one of the major limitations in today?s silicon (Si) integrated circuits (IC) comes from the electrical interconnects. In order to increase the interconnect density and decrease the interconnect energy, optical interconnects to chip or even on chip have been widely investigated. Devices for optical interconnects, such as modulator and detector, have been achieved using Si and germanium (Ge). A major issue now is the lack of a Si compatible light source. Because Si has very poor light emitting efficiency, current research focuses on Ge based semiconductors. Two approaches have been considered to modify the band structure of Ge and make it a direct band gap material: applying tensile strain and alloying with Tin (Sn). In previous research, we have demonstrated the photoluminescence (PL) enhancement of Ge by tensile strain. This presentation will mainly focus on GeSn and SiGeSn alloys. GeSn alloys were grown by molecular beam epitaxy (MBE) machines at low growth temperature (150-200?C) on InGaAs buffer layers. GeSn alloys with up to 10.5% Sn have been demonstrated with high crystal quality. The GeSn layers were characterized by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The composition and strain were studied by X-ray diffraction and X-ray photoelectron spectroscopy. The optical properties of GeSn alloys were measured by photoreflectance (PR) and PL. PR measured at room temperature determined the direct bandgap energies from the maxima of the ligh- and heavy-hole bands to the bottom of ? valley. The calculated energy bowing parameter for GeSn is 2.42?0.04eV. The effect of biaxial strain on the direct band gap is described by deformation potentials. With these basic parameters, we can plot the band gap change of GeSn alloys with respect to Sn concentration and strain, which is very useful for design of future optoelectronic devices based on GeSn alloys. In addition, from low-temperature PL measurement, we showed that adding 6~7% Sn can change unstrained GeSn alloys to direct band gap materials. The second part of the presentation will discuss the growth of SiGeSn and GeSn/SiGeSn double heterostructure. SiGeSn alloys have been proposed to be the barrier layers for GeSn quantum wells. Because ternary alloys, such as SiGeSn, have decoupled bandgap energy and lattice constant, the quantum well design has the freedom to choose strain state while keeping a larger band gap barrier. Good crystal quality of SiGeSn alloys have been grown by MBE and annealed by RTA at 500?C for 2mins in forming gas ambient. The direct bandgap energies of the alloys were measured by PR at room temperature, and the relationship between composition and direct band gap were discussed. Finally, PL of GeSn/SiGeSn double heterostructure were demonstrated. Through these investigations, we obtained the basic material properties of GeSn and SiGeSn, which are valuable in design of group IV light source for on chip optical interconnects. Hai Lin Graduate Student Department of Materials Science and Engineering Stanford University From rthowe at stanford.edu Sun Feb 12 18:55:03 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Sun, 12 Feb 2012 18:55:03 -0800 Subject: SNF logo contest: five days to go! In-Reply-To: <4F2C0AE5.7070108@stanford.edu> References: <4F2C0AE5.7070108@stanford.edu> Message-ID: <4F387B87.2040809@stanford.edu> Dear SNF Labmembers, Just a reminder that the logo contest closes at 5:00 pm this Friday -- 5 days to go. I've received several submissions, but it's still not a high percentage of the more than 200-strong user community. Thanks, Roger Howe On 2/3/12 8:27 AM, Roger T. Howe wrote: > Dear SNF Labmembers, > > As we all eagerly await the re-opening of the SNF and the > installation, permitting, and release this spring of the three new > PlasmaTherm dry etchers, the new Oxford III-V etcher, the 2nd Centura > epi chamber, our 2nd Fiji PE-ALD, and our 2nd Savannah (to be operated > in a glovebox for molecular vapor deposition), I'd like to invite you > to participate in a competition for a new logo for the SNF. Our > current logo (see the website to check it out) dates to the beginning > of NNUN in the mid-1990s. All with artistic talent, or without it for > that matter, are invited to design a new logo over the next two > weeks. This email is going to the labmember community, but we'd like > to open it to your friends, as well. > > The deadline is 5:00 pm, Pacific Time, Friday, February 17. Please > send it in .gif, .jpg, or .pdf format. A committee consisting of the > senior SNF staff and I will select the winner. The prize: a Kindle > Fire. > > Thanks, > Roger Howe > > > From audet at stanford.edu Mon Feb 13 00:36:06 2012 From: audet at stanford.edu (Ross Audet) Date: Mon, 13 Feb 2012 00:36:06 -0800 (PST) Subject: Stanford University Photonics Retreat - early registration closes today Message-ID: <004c01ccea2a$87a18fa0$96e4aee0$@stanford.edu> Students and postdocs: register today for SUPR! (and save $20) We've got a great lineup of speakers and an exciting weekend planned All grad students (including 1st/2nd years) & post-docs are welcome! SUPR.png Stanford University Photonics Retreat 2012 April 13-15, 2012 Asilomar Conference Grounds, Pacific Grove, CA Subsidized Cost for Stanford Students & Post-docs: Early Registration (by Feb. 13): $50 (OSA/SPIE Member) or $150 (non-member) Regular Registration (by Mar. 12): $70 (OSA/SPIE Member) or $175 (non-member) Registration includes two nights shared lodging at Asilomar, all meals and transportation. Renew/Join OSA or SPIE for only $20/$30 to get the reduced rate! More details available at: http://supr.stanford.edu Interested faculty please contact us directly: stanford-photons at stanford.edu ___________ What is SUPR? - SUPR is the Stanford University Photonics Retreat, a student-organized conference for Stanford's optics and photonics community (students, faculty and invited guests & alumni) that is held each year at an off-campus location. SUPR is generously supported by many sponsors to keep costs minimal and low for students. - SUPR 2012 will be our fourth retreat, and is planned by the Stanford Optical Society (a Student Chapter of OSA/SPIE) and the Stanford Photonics Research Center (SPRC). It is our student chapter's marquee event. We believe it is essential to have a dedicated weekend for the larger optics and photonics community to meet off-campus, share their research, network and build fruitful collaborations. ------- SUPR Student Organizing Committee: Aaswath Raman, Ross Audet, Sam Bockenhauer, Kristen Boucher, Robert Chen, Lana Lau, Matthew Lew, Charlie Rudy, Darin Sleiter and Alok Vasudev. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: SUPR.png Type: image/png Size: 611153 bytes Desc: not available URL: From jcdoll at stanford.edu Mon Feb 13 12:58:01 2012 From: jcdoll at stanford.edu (Joey Doll) Date: Mon, 13 Feb 2012 12:58:01 -0800 Subject: PhD Defense Announcement: Joey Doll Message-ID: University PhD Dissertation Defense *MEMS force probes for mechanobiology at the microsecond scale * Joey Doll Department of Mechanical Engineering Advisor: Prof. Beth L. Pruitt Wednesday, March 7, 2012 9:00 am (refreshments at 8:45 am) Paul G. Allen Auditorium (CIS-X 101) http://cis.stanford.edu/directions/ Life is built upon mechanical forces, which play a central role in everything from cell division to embryonic development. Rather than acting as passive mechanical elements, cells and molecules sense and actively respond to mechanical loads. One example of cellular force sensing is mechanotransduction, the conversion of mechanical energy into an electrical signal, which underlies our senses of hearing, touch and balance. For example, the cochlear hair cells in your inner ear are exquisitely sensitive and fast, capable of sensing piconewton-scale forces at the microsecond-time scale. But in order to understand such fast mechanotransduction processes we must first be able to apply and measure small, fast forces. A variety of instruments have been developed for the precise measurement of biological forces and displacements in the past 25 years. The most commonly used techniques are atomic force microscopy, magnetic tweezers, and optical tweezers. Each provides a tradeoff in force, displacement and time resolution, but none of them are capable of applying and detecting forces fast enough for the study of cochlear hair cells. In order to address this technological gap we have developed microfabricated force probes for the application and measurement of forces at the piconewton- and microsecond-scale. In order to simultaneously achieve a high resonant frequency (10-200 kHz in water), low stiffness (0.3-30 mN/m) and low minimum detectable force (10-100 pN), the probes are roughly 300 nm thick, 1 micron wide and 30-200 microns long. Force applied to the cantilever tip is transduced into a voltage by a piezoresistive silicon strain gauge that is embedded in the beam. Actuation is accomplished through a piezoelectric aluminum nitride film or a resistively heated aluminum film to enable high-speed operation without spurious resonant modes. The probes are mass produced on silicon wafers using conventional batch fabrication techniques, and their dimensions are individually adjusted lithographically to accommodate a wide range of desired force and time resolutions. Optics are not required for sensing or actuation so the probes can be integrated with any standard upright up inverted microscope. This talk will begin with a discussion of the mechanical, electrical and thermal design of the force probes. Numerical design optimization is utilized to satisfy the numerous design and performance constraints. Next, I will present the seven- and nine-mask fabrication processes used to manufacture the thermally and piezoelectrically actuated probes. The sensing and actuation performance of the probes will be individually addressed before discussing their integration, particularly crosstalk compensation. I will conclude by presenting preliminary data on the measurement of mammalian hair cell kinetics using the piezoelectrically actuated probes. -------------- next part -------------- An HTML attachment was scrubbed... URL: From mtang at stanford.edu Tue Feb 14 06:40:48 2012 From: mtang at stanford.edu (Mary Tang) Date: Tue, 14 Feb 2012 06:40:48 -0800 Subject: Lab reopening: Wed. Feb. 15, 10 am Message-ID: <4F3A7270.6080908@stanford.edu> Dear labmembers -- We are extremely pleased to be able to confirm that the lab will reopen tomorrow, Wed., Feb. 15, at 10 am. The last of the building wide shutdowns took place successfully yesterday. In addition, the acid waste neutralization system was fully tested. There are a couple of local facilities shutdowns today and in coming weeks, but these will not be showstoppers. Please be aware that this shutdown was considerably more extensive than our regular annual routine. Many tools will remain down or untested. Please check Coral for status of individual tools. Your SNF Staff From josep at stanford.edu Tue Feb 14 08:40:59 2012 From: josep at stanford.edu (Jose Padovani) Date: Tue, 14 Feb 2012 08:40:59 -0800 Subject: REMINDER Seminar: Adam de la Zerda, "Imaging Cancer Biomolecules using Light, Sound and Bio-orthogonal Chemistry", TODAY 4PM Allen 101X In-Reply-To: References: Message-ID: Hi all, Please plan on attending this interesting seminar TODAY by Adam de la Zerda on dynamics of cancer-specific biomolecules using molecular imaging technologies. Who: Adam de la Zerda, PhD When: Tuesday, Feb 14 4:00-5:00 pm Where: Allen 101X Auditorium Title: Imaging Cancer Biomolecules using Light, Sound and Bio-orthogonal Chemistry Abstract: Many cancer-specific biomolecules are dynamic in space, time and local environments. Hence, in order to truly understand their role in cancer progression, it is important to visualize them in living subjects ? their most natural environment. In this talk, we introduce a number of new molecular imaging technologies as well as new chemistry that allows interrogation of many cancer biomarkers for the first time. We first introduce photoacoustic molecular imaging, a technology where short light pulses are converted into ultrasound waves by a contrast molecule. By measuring the ultrasound waves emanating from the body, one can create a detailed 3D image of contrast molecules that target cancer. Second we will introduce our current work on a novel chemistry approach for targeting cancer-specific glycans (sugars). Altered glycan patterns are a hallmark of cancer but are very difficult to image. We will present a novel chemistry method for labeling cell-surface glycans based on specific chemical reactions that are orthogonal to all other biological processes, hence, allowing very specific and sensitive detection. Profile: Dr. Adam de la Zerda will be joining the faculty of Structural Biology at Stanford Medical School in September 2012 as an Assistant Professor. In 2011 Dr. de la Zerda finished his PhD in Electrical Engineering at Stanford University, and is currently a postdoctoral fellow in Chemistry at UC Berkeley. He is working on the development of new molecular imaging technologies to visualize and interrogate various biomolecules in cancer. Dr. de la Zerda has received numerous awards for his research including the Damon Runyon Cancer Research Foundation Fellowship (2011), Era of Hope Distinguished Predoctoral Award (2011), Best Poster Presentation at SPIE Photonics West (2009), the Young Investigator Award at the World Molecular Imaging Congress (2008), the Department of Defense Breast Cancer Research Program Predoctoral Award (2008), and the Bio-X Graduate Student Fellowship (2008). He published over 13 papers in leading journals including Nature Nanotechnology, Nature Medicine, Nano Letters, and PNAS, some of which received significant press coverage from Forbes Magazine, US News and The Washington Post. He holds a number of patents and is the co-founder of a medical imaging device company, OcuBell Inc. He studied Computer Engineering at the Technion ? Israel Institute of Technology where he graduated with a B.Sc. Summa Cum Laude . Hope to see you all there. Jose -- Jose Padovani Graduate Student Electrical Engineering Department Stanford University (650) 796-1971 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Seminar.Adam.de.la.Zerda.Feb14.2012.pdf Type: application/pdf Size: 148975 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: From mahnaz at stanford.edu Wed Feb 15 09:01:51 2012 From: mahnaz at stanford.edu (Mahnaz Mansourpour) Date: Wed, 15 Feb 2012 09:01:51 -0800 Subject: litho update Message-ID: <4F3BE4FF.4090305@stanford.edu> Hello all, welcome back Here is a quick up date, please note the issues and problems on coral that will be more helpful to all of us. I will post a copy of the report by the lab entrance. Litho team -------------- next part -------------- A non-text attachment was scrubbed... Name: Litho shut down update 21512.docx Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document Size: 12436 bytes Desc: not available URL: From mahnaz at stanford.edu Wed Feb 15 09:22:07 2012 From: mahnaz at stanford.edu (Mahnaz Mansourpour) Date: Wed, 15 Feb 2012 09:22:07 -0800 Subject: White light update Message-ID: <4F3BE9BF.4000905@stanford.edu> Hello all, *Diffusion bench up New SRD installed and tested upper unit is up, we are not up for 3' and 6" yet. wbnonmetal, wbgen, wbsilicide, wbsolven, wbgaas are all up. wbmetal Down Wbnitride down Most characterization tools are up except stress tester and alphastep are still down. white light team* -------------- next part -------------- An HTML attachment was scrubbed... URL: From mtang at stanford.edu Wed Feb 15 10:05:32 2012 From: mtang at stanford.edu (Mary Tang) Date: Wed, 15 Feb 2012 10:05:32 -0800 Subject: We're open for business! Message-ID: <4F3BF3EC.1050900@stanford.edu> Dear labmembers -- Thanks for your patience -- at long last, we are open again! However, please do be aware that many tools remain down and/or untested. We are by no means back to normal operations. Make sure to check Coral for specific tool status. The second question after "when will you open" is "when get I get a bin"? Rest assured that we are working on revamping the system, but are making bringing tools back up a priority. Please expect to see bin assignment rules soon. Just a heads-up -- there will be a priority assignment policy based on previous recent active lab use (if you've capped before shutdown, for example) -- and those who have helped with the lab startup will get their choice of storage options (and if you are interested in this limited offer, please contact a staff member.) Hope to see you in the lab! Your SNF staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From toecutter4ranger at gmail.com Wed Feb 15 12:46:34 2012 From: toecutter4ranger at gmail.com (ToeCutter) Date: Wed, 15 Feb 2012 12:46:34 -0800 Subject: Plenty of food for you at Allen X 101 Message-ID: Help yourself Plenty of food for all James From goldhaber-gordon at stanford.edu Thu Feb 16 15:03:39 2012 From: goldhaber-gordon at stanford.edu (David Goldhaber-Gordon) Date: Thu, 16 Feb 2012 15:03:39 -0800 Subject: Stanford CPN Nanoprobes Workshop, May 18, 2012 In-Reply-To: <20120203194235.B61A54702B8@smtp.stanford.edu> References: <20120203194235.B61A54702B8@smtp.stanford.edu> Message-ID: Dear SNF labmembers (feel free to forward to others), You are cordially invited to: Stanford University?s Center for Probing the Nanoscale (CPN) 8th Annual Workshop, May 18, 2012 - (Students and Postdocs are FREE) *Registration is open * Speakers: *Stuart Lindsay , Arizona State University Sarah Tolbert , University of California, Los Angeles Felice Frankel , Harvard University Katherine Aidala , Mount Holyoke College Abhay Pasupathy , Columbia University Ania Bleszynski Jayich , University of California, Santa Barbara Michael Flatt? , University of Iowa James Hone , Columbia University* Best wishes, David ----------------------------------------------------------------- David Goldhaber-Gordon goldhaber-gordon at stanford.edu Associate Professor of Physics davidg at post.harvard.edu and Director, (permanent forwarding) Center for Probing the Nanoscale Stanford University www.stanford.edu/group/cpn/ (650) 725-2047 (lab) (650) 724-3709 (office) Address for letters or packages: Administrative Associate: David Goldhaber-Gordon Roberta Edwards Geballe Laboratory for Advanced Materials McCullough, Rm. 338 McCullough Building, Room 346 Phone: (650) 723-8028 476 Lomita Mall Fax: (650) 724-3681 Stanford, CA 94305-4045 email: redward at stanford.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From jwc at snf.stanford.edu Thu Feb 16 18:49:38 2012 From: jwc at snf.stanford.edu (James W. Conway) Date: Thu, 16 Feb 2012 18:49:38 -0800 Subject: RAITH information and applications meeting Message-ID: <4F3DC042.9080500@snf.stanford.edu> An HTML attachment was scrubbed... URL: From rthowe at stanford.edu Fri Feb 17 09:00:02 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Fri, 17 Feb 2012 09:00:02 -0800 Subject: SNF logo competition: only 8 hours to go!! Message-ID: <4F3E8792.5020305@stanford.edu> Dear Labmembers and friends of the SNF, Just a reminder that today at 5:00 pm is the deadline. We have had many entries, but the winning one may be still waiting to be submitted ... or still not conceived! Thanks, Roger From mtang at stanford.edu Fri Feb 17 18:03:12 2012 From: mtang at stanford.edu (Mary Tang) Date: Fri, 17 Feb 2012 18:03:12 -0800 Subject: Lab Bins and Lockers! Message-ID: <4F3F06E0.2060705@stanford.edu> Dear labmembers -- We know this is a subject that is dear to your hearts: storage bins. We have had two problems with bin management that we hope to address this year. First, there never seems to be enough bins. Actually, with 300 bins in the lab, there should be enough to supply one for every labmember who spends more than even just 5 hours/month in the lab. The issue has been staying on top with labmembers who are not very active or who have left. Second (and actually a more serious problem) is that unless a bin subscription is actively canceled or transferred, we may continue to bill expired accounts. Although it's not a lot of money, it creates some really serious accounting problems. So, starting this year, we will be requiring each labmember to actively renew their bin or locker subscriptions each month. It will be a simple online procedure, but you have to verify that you are still using the bin or locker and that you are accepting this charge on your project. Bins and lockers that are not renewed may be reassigned. And you can transfer your bin assignment to a labmate, if you like. As before, bin and locker assignments are subject to availability -- and active lab use by the individual labmember, as defined by equipment enabling. We will begin assigning lab bins on Wednesday, Feb. 22. In general, priority will be given to labmembers who capped in Oct/Nov before shutdown; those who are actively using the lab right now (i.e., enabling tools for hours, as opposed to minutes); and those wonderful souls who helped with the lab shutdown and startup. In the meantime, if you are working in the lab this weekend, you may bring your personal items into the lab and place them temporarily in one empty bin, provided you leave a note clearly showing your Coral ID and contact info. Be aware, though, that bins will be assigned randomly so that you should move/remove your belongings by Wednesday when assignments begin. Thanks for your patience and cooperation as we work on this new system -- Your SNF staff From rthowe at stanford.edu Fri Feb 17 18:42:51 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Fri, 17 Feb 2012 18:42:51 -0800 Subject: thanks to the 23 entrants In-Reply-To: <4F3E8792.5020305@stanford.edu> References: <4F3E8792.5020305@stanford.edu> Message-ID: <4F3F102B.5030701@stanford.edu> Dear Labmembers, The competition is closed -- we've received many designs for the new logo from 23 contributors. The winner will be announced sometime next week. Thanks, Roger Howe From rhenn at stanford.edu Sat Feb 18 11:27:56 2012 From: rhenn at stanford.edu (Robert Hennessy) Date: Sat, 18 Feb 2012 11:27:56 -0800 Subject: PhD Defense: A Vacuum Encapsulated Resonator for Humidity Measurement - Wed. 2:15pm Allen 101x In-Reply-To: References: Message-ID: <4F3FFBBC.1030201@stanford.edu> University PhD Dissertation Defense *A Vacuum Encapsulated Resonator for Humidity Measurement* Robert Hennessy Department of Electrical Engineering Advisor: Prof. Roger T. Howe /Wednesday, February 22, 2012 2:15 pm (refreshments at 2 pm) Paul G. Allen Auditorium (CIS-X 101)/ http://cis.stanford.edu/directions/ Relative humidity sensing is important in many applications including home appliances, semiconductor manufacturing, air conditioning, medical, automotive and meteorological. Various technologies exist to measure relative humidity, including capacitive, resistive, and resonant gravimetric sensors. For these methods, water must diffuse into a material, which limits the speed of the sensors. Instead, the surface resistance of insulators could be used. But, the resistance cannot be measured using direct measurement techniques because of the high surface resistance (10^15 -- 10^20 ?/? for silicon dioxide). In our sensor, a resonator is used to indirectly measure the surface resistance of silicon dioxide. As relative humidity increases, the surface resistance of the silicon dioxide decreases because the thickness of adsorbed water on the surface increases. This decrease in surface resistance leads to faster charge decay from a capacitor. . An electrically connected resonator converts the charge on the capacitor to a frequency via the electrostatic spring softening term of the resonator. Next, an oscillator and counter are used to measure frequency shift over time. Finally, this time-varying shift in resonant frequency is used to determine the relative humidity of the ambient. To characterize our sensor, a custom experimental test setup, including environmental chamber and oscillator board, was built. The effect of relative humidity and temperature on the surface resistance and the charge decay characteristic of the resonator were measured. Our sensor has 50 times improvement in the minimal detectible signal over commercial sensors. Additionally, our sensor are faster than the commercial sensors. Finally, the measured hysteresis of our sensor is <0.25% relative humidity. Potential design improvements will be discussed including modification of the surface with Atomic Layer Deposition (ALD) films to change the surface resistance by modifying the thickness of the adsorbed water. Additionally, ground rings around the bondpads can reduce the steady state surface resistance and decrease the drift caused by the transient response of the surface resistance. Finally, potential extensions of our sensor to other quasistatic charge measurements, including dielectric conduction, biological sensors, gas sensors and chemical sensors, will be briefly discussed. -------------- next part -------------- An HTML attachment was scrubbed... URL: From jjeong1 at stanford.edu Sun Feb 19 15:35:11 2012 From: jjeong1 at stanford.edu (Jae-Woong Jeong) Date: Sun, 19 Feb 2012 15:35:11 -0800 Subject: EE Ph.D. Oral Examination: Jae-Woong Jeong, Feb. 27 at 3:00 pm, CIS-X Auditorium Message-ID: Stanford University Ph.D. Oral Examination - Department of Electrical Engineering Title: Design of Optical Microsystems: Applications in Biomedical Imaging and Optical Communication Speaker: Jae-Woong Jeong Advisor: Professor Olav Solgaard Date: Monday, February 27, 2012 Time: 3:00 pm (refreshments at 2:45 pm) Location: Allen-X Auditorium (formerly CIS-X Auditorium) - Room 101 Abstract: Scaling of optical systems can open up new opportunities for various applications by enabling what would not be possible on a larger scale. Such miniaturized optical systems can be achieved through optical MEMS (Micro-electro-mechanical systems) technology. This technology not only enables optical devices with high performance and high functionality, but also allows miniaturization, integration, and batch fabrication of optical systems, making them portable, reliable, and cost-effective. In this talk, I will present two novel optical microsystems for applications in biomedical imaging and optical communication. In the first part of my talk, I will introduce the 3-D MEMS scanning system for a miniature dual-axis confocal (DAC) microendoscope, which is an emerging biomedical imaging modality with high resolution, good tissue penetration, large field of view, and the ability to provide both reflectance and fluorescence contrast images. A pair of MEMS scanners (2-D lateral and 1-D vertical MEMS scanners) that are designed to achieve 3-D scanning in an endoscope-compatible imaging probe will be presented. In addition, front-side processing of the scanners that enables not only simple and cost-effective fabrication but also compact and robust structures will be described. Co-operation of a 2-D lateral scanner and a 1-D vertical scanner enables fast 3-D microscopy over a volume that measures 340?m X 236?m X 286?m. I will describe the principle of the all-MEMS-based 3-D scanning DAC microscopy that gives the functionality of OCT to a confocal microscope by producing real-time imaging along the axial direction of the microscope. In the second part of my talk, I will describe the design, fabrication, and characterization of a multi-functional tunable optical filter, which is a key element for dynamic wavelength provisioning in reconfigurable optical networks and communication systems. This filter can control both the center wavelength and the passband independently and continuously, using a MEMS spatial light modulator (SLM) that is implemented with gold-coated mirrors microassembled on a MEMS platform. The design of SLM with large displacement bi-directional combdrive actuators will be demonstrated. Also, MEMS platform technology that enables a compact chip size with large apertures and high-quality optical mirrors will be presented. To verify the performance of the filter, it has been tested as an amplified spontaneous emission (ASE) noise rejection filter in a 10Gb/s optical communication system. I will discuss the filtering performance in the optical system in terms of bit error rate improvement. -------------- next part -------------- An HTML attachment was scrubbed... URL: From toecutter4ranger at gmail.com Tue Feb 21 09:49:39 2012 From: toecutter4ranger at gmail.com (ToeCutter) Date: Tue, 21 Feb 2012 09:49:39 -0800 Subject: Take a spin with me HEADWAY training cancelled today Message-ID: Good morning Take a spin with me, HEADWAY Training cancelled today Will reschedule James Conway From usharaghuram at gmail.com Tue Feb 21 10:35:31 2012 From: usharaghuram at gmail.com (Usha Raghuram) Date: Tue, 21 Feb 2012 10:35:31 -0800 Subject: Lab Bins and Lockers! In-Reply-To: <4F3F06E0.2060705@stanford.edu> References: <4F3F06E0.2060705@stanford.edu> Message-ID: Hi Mary, Happy new year. I am so glad that the lab is open now. Great job by the team to have many tools functioning when the lab reopened. As I was covering fro another colleague of mine who had to go on leave of absence, I was unable to help out during the transition. I will be able to do some work going forward. Please let me know if you need any help. I would like to keep the bin I have in the litho area. Mihir also has lab bins and we would like to retain those under Intermolecular account as we have other users from Intermolecular (Ludwig & Aleta and Xuena). I will fill out the paperwork when you post the link. Regards, Usha On Fri, Feb 17, 2012 at 6:03 PM, Mary Tang wrote: > Dear labmembers -- > > We know this is a subject that is dear to your hearts: storage bins. We > have had two problems with bin management that we hope to address this > year. First, there never seems to be enough bins. Actually, with 300 bins > in the lab, there should be enough to supply one for every labmember who > spends more than even just 5 hours/month in the lab. The issue has been > staying on top with labmembers who are not very active or who have left. > Second (and actually a more serious problem) is that unless a bin > subscription is actively canceled or transferred, we may continue to bill > expired accounts. Although it's not a lot of money, it creates some really > serious accounting problems. > > So, starting this year, we will be requiring each labmember to actively > renew their bin or locker subscriptions each month. It will be a simple > online procedure, but you have to verify that you are still using the bin > or locker and that you are accepting this charge on your project. Bins and > lockers that are not renewed may be reassigned. And you can transfer your > bin assignment to a labmate, if you like. As before, bin and locker > assignments are subject to availability -- and active lab use by the > individual labmember, as defined by equipment enabling. > > We will begin assigning lab bins on Wednesday, Feb. 22. In general, > priority will be given to labmembers who capped in Oct/Nov before shutdown; > those who are actively using the lab right now (i.e., enabling tools for > hours, as opposed to minutes); and those wonderful souls who helped with > the lab shutdown and startup. > > In the meantime, if you are working in the lab this weekend, you may bring > your personal items into the lab and place them temporarily in one empty > bin, provided you leave a note clearly showing your Coral ID and contact > info. Be aware, though, that bins will be assigned randomly so that you > should move/remove your belongings by Wednesday when assignments begin. > > Thanks for your patience and cooperation as we work on this new system -- > > Your SNF staff > -------------- next part -------------- An HTML attachment was scrubbed... URL: From josep at stanford.edu Tue Feb 21 12:02:26 2012 From: josep at stanford.edu (Jose Padovani) Date: Tue, 21 Feb 2012 12:02:26 -0800 Subject: =?windows-1252?Q?REMINDER=3A_Seminar_Today_-_Nathan_Klejwa=2C_?= =?windows-1252?Q?=22Now_we_need_a_5th_order_aberration-corrected?= =?windows-1252?Q?_TEM_to_see_what=92s_gone_wrong=22=2C_Tuesday?= =?windows-1252?Q?=2C_February_21=2C_2012=2C_4-5pm_Allen_101X_Aud?= =?windows-1252?Q?itorium?= Message-ID: <38CF15AA-71DA-4EC3-833D-11AB07D4DF07@stanford.edu> Hi all, Please plan on attending this interesting seminar TODAY by Nathan Klejwa from Halcyon Molecular, Inc.. Tuesday, February 21, 2012, 4:00-5:00 Allen 101X Auditorium Title: Now we need a 5th order aberration-corrected TEM to see what?s gone wrong Speaker: Nathan Klejwa Project Manager, Halcyon Molecular, Inc., Redwood City, California Abstract: Low-cost, widely available DNA sequence data will make medicine an information science, allowing doctors and patients to predict drug reactions, target specific cells, and tailor treatments to individual patients. Current sequencing methods use short read-length data mapped to a genomic reference to detect small-scale genomic variation in the ?easy to read? sections of the genome. Structural variations, which occur over large genomic distances, are extremely difficult to detect with these methods, and are common determinants of phenotypic variation and diseases such as cancer. Halcyon Molecular seeks to use high-resolution electron microscopy to directly read long, contiguous sections of human DNA and create truly de novo genomes. This talk will highlight some of the technical challenges and interesting solutions unique to this highly interdisciplinary approach to DNA sequencing. Short Bio: Nathan Klejwa is currently a PhD student at Stanford University and an engineering project manager at Halcyon Molecular, Inc. His research includes rapid prototyping and low-cost processing for reel-to-reel compatible microsystems. This work aims to minimize complex, time-intensive, and expensive fabrication steps and maximize design flexibility, both for academic prototyping and full-scale production. During the past year at Halcyon Molecular, he has overseen efforts in direct DNA manipulation, biological sample preparation, microscopy infrastructure, and microfabrication. Hope to see you all there, Jose -- Jose Padovani Graduate Student Electrical Engineering Department Stanford University (650) 796-1971 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: NK - Abstract and Bio.pdf Type: application/pdf Size: 144596 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: From tgwinn at stanford.edu Tue Feb 21 21:50:35 2012 From: tgwinn at stanford.edu (Thomas Gwinn) Date: Tue, 21 Feb 2012 21:50:35 -0800 Subject: Special Seminar: Pamela Bhatti "MEMS-based approaches to overcoming sensory loss in the auditory and vestibular systems" Message-ID: *Special Seminar* *MEMS-based Approaches to Overcoming Sensory Loss in the Auditory and Vestibular Systems* Presented by: *Prof. Pamela T. Bhatti* School of Electrical and Computer Engineering, Georgia Institute of Technology *Monday, February 27, 2012* *Clark Center Auditorium* *4:00 PM* *Abstract:* In the BioSystems Interface Laboratory we develop novel sensing and stimulating systems to overcome sensory loss. To enhance sound perception with cochlear implants, we have developed advanced thin-film intracochlear electrode arrays. Moving to the vestibular system, we pursue both an implantable and non-implantable systems. Analogous to a cochlear implant, we are developing a vestibular prosthesis to convey head rotation cues to the vestibular system through electrical stimulation of vestibular nerve fibers to overcome debilitating bilateral vestibular hypofunction. Complementing our work in implantable systems, we have developed a head worn angular motion monitoring system to aid patients in completing vestibular rehabilitation exercises at home. By utilizing a user-friendly interface to the system we hope to facilitate the transfer of patient measures to a clinic between rehabilitation sessions. *Short Bio:* Dr. Pamela Bhatti is an Assistant Professor in the School of Electrical and Computer Engineering at Georgia Tech in Atlanta, GA. She received a B.S. in Engineering Science (Bioengineering) from the University of California, Berkeley in 1989, an M.S. in Electrical Engineering from the University of Washington in 1993, and a Ph.D. in Electrical Engineering from the University of Michigan, Ann Arbor in 2006 with an emphasis on Micro-electro Mechanical Systems (MEMS). Before completing her Ph.D., she researched the detection of breast cancer with ultrasound imaging at the University of Michigan?s Department of Radiology (1997-1999). Her industry experience includes embedded systems software development at Microware Corporation, Des Moines, IA (1996-1997), local operating network applications development and customer support at Motorola Semiconductor in Austin, TX (1994-1995), and research and fabrication of controlled-release drug delivery systems at Alza Corporation in Palo Alto, CA (1986-1990). Pamela received the NSF CAREER Award in 2011. Committed to translating technology to the clinical setting, she is a KL2 Scholar with the Atlanta Clinical and Translations Sciences Institute. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Pamela.Bhatti.Seminar.Feb.27.2102.pdf Type: application/pdf Size: 170340 bytes Desc: not available URL: From rhenn at stanford.edu Wed Feb 22 10:19:29 2012 From: rhenn at stanford.edu (Robert Hennessy) Date: Wed, 22 Feb 2012 10:19:29 -0800 Subject: [Reminder] TODAY - Oral Exam - 2:15 pm in Allen 101x - A Vacuum Encapsulated Resonator for Humidity Measurement Message-ID: <4F4531B1.9020204@stanford.edu> University PhD Dissertation Defense *A Vacuum Encapsulated Resonator for Humidity Measurement* Robert Hennessy Department of Electrical Engineering Advisor: Prof. Roger T. Howe /Wednesday, February 22, 2012 2:15 pm (refreshments at 2 pm) Paul G. Allen Auditorium (CIS-X 101)/ http://cis.stanford.edu/directions/ Relative humidity sensing is important in many applications including home appliances, semiconductor manufacturing, air conditioning, medical, automotive and meteorological. Various technologies exist to measure relative humidity, including capacitive, resistive, and resonant gravimetric sensors. For these methods, water must diffuse into a material, which limits the speed of the sensors. Instead, the surface resistance of insulators could be used. But, the resistance cannot be measured using direct measurement techniques because of the high surface resistance (10^15 -- 10^20 ?/? for silicon dioxide). In our sensor, a resonator is used to indirectly measure the surface resistance of silicon dioxide. As relative humidity increases, the surface resistance of the silicon dioxide decreases because the thickness of adsorbed water on the surface increases. This decrease in surface resistance leads to faster charge decay from a capacitor. . An electrically connected resonator converts the charge on the capacitor to a frequency via the electrostatic spring softening term of the resonator. Next, an oscillator and counter are used to measure frequency shift over time. Finally, this time-varying shift in resonant frequency is used to determine the relative humidity of the ambient. To characterize our sensor, a custom experimental test setup, including environmental chamber and oscillator board, was built. The effect of relative humidity and temperature on the surface resistance and the charge decay characteristic of the resonator were measured. Our sensor has 50 times improvement in the minimal detectible signal over commercial sensors. Additionally, our sensor are faster than the commercial sensors. Finally, the measured hysteresis of our sensor is <0.25% relative humidity. Potential design improvements will be discussed including modification of the surface with Atomic Layer Deposition (ALD) films to change the surface resistance by modifying the thickness of the adsorbed water. Additionally, ground rings around the bondpads can reduce the steady state surface resistance and decrease the drift caused by the transient response of the surface resistance. Finally, potential extensions of our sensor to other quasistatic charge measurements, including dielectric conduction, biological sensors, gas sensors and chemical sensors, will be briefly discussed. -------------- next part -------------- An HTML attachment was scrubbed... URL: From mtang at stanford.edu Wed Feb 22 11:09:51 2012 From: mtang at stanford.edu (Mary Tang) Date: Wed, 22 Feb 2012 11:09:51 -0800 Subject: Fire alarm testing, Thursday 1:30-2 pm Message-ID: <4F453D7F.5040409@stanford.edu> Dear lab and building occupants -- Please be aware that there will be fire alarm testing tomorrow (Thursday) between 1:30 and 2 pm. This is to support some demolition work for the lab renovation but requires a "spot" check of the whole building. This testing will be brief and will happen intermittently. Thank you for your help in this process. Your SNF Staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From mtang at stanford.edu Wed Feb 22 12:59:47 2012 From: mtang at stanford.edu (Mary Tang) Date: Wed, 22 Feb 2012 12:59:47 -0800 Subject: Course Announcement- E204: Research Ethics for Engineers & Scientists Message-ID: <4F455743.60800@stanford.edu> Dear labmembers -- Have you ever wondered: - How is authorship on a paper decided? Who gets to be first author? What are the responsibilities of a contributors to jointly authored paper? - Who should be included as an inventor on a patent? - Is it OK to omit "bad" data points from an analysis? - What can and should you do if you suspect data fraud? - How should peer review be handled? How is it actually done? - Are you responsible for anticipating the ways, good and bad, that your research might be used? What are a researcher's specific responsibilities to society? - What are the responsibilities of mentors and mentees? - What kinds of conflicts of interest are important to avoid? Explore these issues and more, in E204, Research Ethics for Engineers and Scientists, a course that examines the practical aspects of ethics for researchers with lectures, discussions, guest speakers, and real case studies. This course is 1-2 units and will be held Spring term, on Thursdays, 2:15 PM - 4:05 PM. The course instructor is Prof. Robert McGinn, Director of the Program in Science, Technology& Society. Last year's course featured the following guest speakers: - Prof. Malcolm Beasely, Applied Physics, who headed the Hendrik Schon commission - Katherine Ku, Director of the Office of Technology Licensing, on the ethics of licensing - Prof. Roger Howe, Electrical Engineering, on authorship, publication and intellectual property For more information, see the Bulletin or contact Prof. McGinn. For those of you supported by NSF fellowships, this course satisfies the NSF requirement for "Training in the responsible and ethical conduct of research." (http://dor.stanford.edu/rcr.html) -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From svo at stanford.edu Wed Feb 22 15:44:56 2012 From: svo at stanford.edu (Sonny Vo) Date: Wed, 22 Feb 2012 15:44:56 -0800 Subject: microbeads Message-ID: hi labmembers, might any of you carry some polysterene/glass beads that's around 500um in size that i may have? i just need 30 or so of them (they sell them in the pounds which means you have lots of them if you might have purchased some) http://www.amazon.com/No-hole-Metallic-Transparent-Glass-Microbeads/dp/B003WSUEYO/ref=sr_1_5?ie=UTF8&qid=1329953932&sr=8-5 i'll buy the item by 5pm today so please neglect this email after 5pm. however, i know i'll get a 'you've won some microbeads!' email by then. :) thanks! -- Regards, Sonny ----*** Department of Applied physics, Stanford University research group: http://snow.stanford.edu/index.html* 626-216-4597 -------------- next part -------------- An HTML attachment was scrubbed... URL: From josep at stanford.edu Wed Feb 22 20:20:49 2012 From: josep at stanford.edu (Jose Padovani) Date: Wed, 22 Feb 2012 20:20:49 -0800 Subject: Special Seminar: Dr. Peter Krulevitch, "Innovation Within a Large Medical Device Company: a Journey from Microtechnology R&D to User Needs Driven Design" Message-ID: <827193C6-6F37-407F-B359-C65D57B3D5DC@stanford.edu> Special Seminar Innovation Within a Large Medical Device Company: a Journey from Microtechnology R&D to User Needs Driven Design Speaker: Dr. Peter Krulevitch Research Fellow, Janssen R&D Tuesday, February 28, 2012 Allen 101X Auditorium 4:00-5:00pm Abstract: Over the past ten years, the R&D environment inside large medical device companies has changed considerably, making it increasingly challenging to develop innovative products from within. Spending on early development projects has declined, including an end to funding for projects not directly tied to product launches. At the same time, the allowable time before R&D innovations must impact sales has decreased. As a result, the model for driving internal innovation has evolved. This presentation will cover one engineer?s R&D experience at Johnson & Johnson over a period of nearly ten years. Initial efforts focused on the application of microtechnology to medical devices, including Nitinol thin films aimed at cardiovascular applications and electrokinetic patch pumps for drug delivery. Mid-??term projects applied low risk microtechnology with increased attention to user needs, emphasis on industrial design as well as technology, and focus and accountability for near term results. Projects included insulin infusion sets and subcutaneous sensor inserters with flexible etched Nitinol/polymer hybrid needles, injection molded micropumps with etched valves for drug delivery, and drug delivery management systems. Recently, efforts have drifted away from technology-??based innovation in favor of patient-??centric design-??based innovation, focusing on simple, intuitive to use devices. An example of a self-??administration device for subcutaneous injections will be presented. Short Bio: Peter Krulevitch is a Research Fellow at Janssen R&D, the pharmaceutical development organization within Johnson & Johnson, where he leads a small team responsible for early development of devices for subcutaneous, intramuscular, intravenous, intranasal, and pulmonary delivery of large and small molecule drugs. He joined Janssen from J&J?s device sector, where he led a group focused on applying microtechnology to medical devices, and worked with LifeScan and Animas on devices for the treatment of diabetes. Prior to J&J, he was a Research Engineer at Lawrence Livermore National Laboratory?s Center for Microtechnology, where he worked on microfluidic systems for cell-based diagnostics and flexible electrode arrays for retinal implants, among other projects. He received his Ph.D. in Mechanical Engineering from UC Berkeley (1994), where he studied the mechanical properties of polycrystalline silicon at the Berkeley Sensor & Actuator Center with Professors Roger Howe and George Johnson. Dr. Krulevitch is co-inventor on approximately 50 issued patents. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PeterKrulevitch_Seminar.Feb28.2012.pdf Type: application/pdf Size: 68410 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: From mtang at stanford.edu Thu Feb 23 13:04:24 2012 From: mtang at stanford.edu (Mary Tang) Date: Thu, 23 Feb 2012 13:04:24 -0800 Subject: FYI: Construction work update today and tomorrow Message-ID: <4F46A9D8.6000202@stanford.edu> Hi all -- Just to let you know... There will be some fire alarm testing today, between 1:30 and 2 pm. Alarms may go off briefly, but not to worry, this is testing related to the continued renovation project. There will also be paint removal in the area next to the lab/receiving area this afternoon and tomorrow. Strong odors are not expected (paint will be removed by grinding and vacuuming), but there may be some non-routine smells. Thanks for your patience -- Your SNF staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From rthowe at stanford.edu Fri Feb 24 13:06:32 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Fri, 24 Feb 2012 13:06:32 -0800 Subject: new SNF logo Message-ID: <4F47FBD8.1070106@stanford.edu> Dear Labmembers and Staff, I've attached the new SNF logo, which was selected by a panel of 8 judges from the SNF staff from the many entries we received, which were relabeled by Ann Guerra in a randomized way to allow us to make an unbiased assessment. The winner: Jose Padovani. Thanks, everyone, for your work on the design and on the judging. Five of the 8 judges voted for R1 as #1. We'll integrated it into the updated SNF website asap. Roger -------------- next part -------------- A non-text attachment was scrubbed... Name: R1.pdf Type: image/pdf Size: 558580 bytes Desc: not available URL: From ntayebi at stanford.edu Fri Feb 24 16:07:18 2012 From: ntayebi at stanford.edu (Noureddine Tayebi) Date: Fri, 24 Feb 2012 16:07:18 -0800 (PST) Subject: fluoropolymer pre-bonding etchant for teflong bonding In-Reply-To: <4F47FBD8.1070106@stanford.edu> Message-ID: <1584892929.14243167.1330128438466.JavaMail.root@zm02.stanford.edu> Dear Labmembers, I was wondering if anyone had some fluoropolymer pre-bonding etchant to bond some Teflon tubing to other metallic parts. I just need a little bit as I'm using microtubing that does not necessitate much. Thanks in advance, Noureddine From jjeong1 at stanford.edu Sun Feb 26 21:53:35 2012 From: jjeong1 at stanford.edu (Jae-Woong Jeong) Date: Sun, 26 Feb 2012 21:53:35 -0800 Subject: [Reminder] EE Ph.D. Oral Examination: Jae-Woong Jeong, Feb. 27 at 3:00 pm, CIS-X Auditorium Message-ID: Stanford University Ph.D. Oral Examination - Department of Electrical Engineering Title: Design of Optical Microsystems: Applications in Biomedical Imaging and Optical Communication Speaker: Jae-Woong Jeong Advisor: Professor Olav Solgaard Date: Monday, February 27, 2012 Time: 3:00 pm (refreshments at 2:45 pm) Location: Allen-X Auditorium (formerly CIS-X Auditorium) - Room 101 Abstract: Scaling of optical systems can open up new opportunities for various applications by enabling what would not be possible on a larger scale. Such miniaturized optical systems can be achieved through optical MEMS (Micro-electro-mechanical systems) technology. This technology not only enables optical devices with high performance and high functionality, but also allows miniaturization, integration, and batch fabrication of optical systems, making them portable, reliable, and cost-effective. In this talk, I will present two novel optical microsystems for applications in biomedical imaging and optical communication. In the first part of my talk, I will introduce the 3-D MEMS scanning system for a miniature dual-axis confocal (DAC) microendoscope, which is an emerging biomedical imaging modality with high resolution, good tissue penetration, large field of view, and the ability to provide both reflectance and fluorescence contrast images. A pair of MEMS scanners (2-D lateral and 1-D vertical MEMS scanners) that are designed to achieve 3-D scanning in an endoscope-compatible imaging probe will be presented. In addition, front-side processing of the scanners that enables not only simple and cost-effective fabrication but also compact and robust structures will be described. Co-operation of a 2-D lateral scanner and a 1-D vertical scanner enables fast 3-D microscopy over a volume that measures 340?m X 236?m X 286?m. I will describe the principle of the all-MEMS-based 3-D scanning DAC microscopy that gives the functionality of OCT to a confocal microscope by producing real-time imaging along the axial direction of the microscope. In the second part of my talk, I will describe the design, fabrication, and characterization of a multi-functional tunable optical filter, which is a key element for dynamic wavelength provisioning in reconfigurable optical networks and communication systems. This filter can control both the center wavelength and the passband independently and continuously, using a MEMS spatial light modulator (SLM) that is implemented with gold-coated mirrors microassembled on a MEMS platform. The design of SLM with large displacement bi-directional combdrive actuators will be demonstrated. Also, MEMS platform technology that enables a compact chip size with large apertures and high-quality optical mirrors will be presented. To verify the performance of the filter, it has been tested as an amplified spontaneous emission (ASE) noise rejection filter in a 10Gb/s optical communication system. I will discuss the filtering performance in the optical system in terms of bit error rate improvement. -------------- next part -------------- An HTML attachment was scrubbed... URL: From rthowe at stanford.edu Mon Feb 27 07:09:43 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Mon, 27 Feb 2012 07:09:43 -0800 Subject: Reminder: Pamela Bhatti (Georgia Tech), Seminar 4-5 TODAY, Clark Center Aud. Message-ID: <4F4B9CB7.3050302@stanford.edu> *MEMS-based Approaches to Overcoming Sensory Loss in the Auditory and Vestibular Systems* Presented by: *Prof. Pamela T. Bhatti* School of Electrical and Computer Engineering, Georgia Institute of Technology *Monday, February 27, 2012* *Clark Center Auditorium* *4:00 PM* *Abstract:* In the BioSystems Interface Laboratory we develop novel sensing and stimulating systems to overcome sensory loss. To enhance sound perception with cochlear implants, we have developed advanced thin-film intracochlear electrode arrays. Moving to the vestibular system, we pursue both an implantable and non-implantable systems. Analogous to a cochlear implant, we are developing a vestibular prosthesis to convey head rotation cues to the vestibular system through electrical stimulation of vestibular nerve fibers to overcome debilitating bilateral vestibular hypofunction. Complementing our work in implantable systems, we have developed a head worn angular motion monitoring system to aid patients in completing vestibular rehabilitation exercises at home. By utilizing a user-friendly interface to the system we hope to facilitate the transfer of patient measures to a clinic between rehabilitation sessions. *Short Bio:* Dr. Pamela Bhatti is an Assistant Professor in the School of Electrical and Computer Engineering at Georgia Tech in Atlanta, GA. She received a B.S. in Engineering Science (Bioengineering) from the University of California, Berkeley in 1989, an M.S. in Electrical Engineering from the University of Washington in 1993, and a Ph.D. in Electrical Engineering from the University of Michigan, Ann Arbor in 2006 with an emphasis on Micro-electro Mechanical Systems (MEMS). Before completing her Ph.D., she researched the detection of breast cancer with ultrasound imaging at the University of Michigan's Department of Radiology (1997-1999). Her industry experience includes embedded systems software development at Microware Corporation, Des Moines, IA (1996-1997), local operating network applications development and customer support at Motorola Semiconductor in Austin, TX (1994-1995), and research and fabrication of controlled-release drug delivery systems at Alza Corporation in Palo Alto, CA (1986-1990). Pamela received the NSF CAREER Award in 2011. Committed to translating technology to the clinical setting, she is a KL2 Scholar with the Atlanta Clinical and Translations Sciences Institute. -------------- next part -------------- An HTML attachment was scrubbed... URL: From mtang at stanford.edu Mon Feb 27 13:10:42 2012 From: mtang at stanford.edu (Mary Tang) Date: Mon, 27 Feb 2012 13:10:42 -0800 Subject: Lab bins Message-ID: <4F4BF152.6000105@stanford.edu> Dear labmembers -- We appreciate your enthusiasm for coming back to work in the lab -- but please do not occupy lab bins without prior assignment. There is a new system for managing lab bins (described at the link below), with priority given to those who have been consistently active in the lab and/or are actively enabling equipment now. This is necessary in our effort to try to ensure that bins are assigned to people who are actually using the lab. Bins are being randomly assigned, so any personal items that are in unassigned bins are subject to being removed from the lab. Please see Maureen Baran about getting a bin assignment (or a locker assignment, for that matter.) http://snf.stanford.edu/cgi-bin/ezmlm-cgi?msp:4920:abpgpkkobjflecfaclag Thanks for your attention -- Mary -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility Paul G. Allen Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From kangning at stanford.edu Mon Feb 27 14:17:36 2012 From: kangning at stanford.edu (kangning) Date: Mon, 27 Feb 2012 14:17:36 -0800 Subject: What do you think about the reproducibility of AFM? Message-ID: <201202271417356331838@stanford.edu> Hi all, I am doing modification to a surface and I want to track the change of the depth of some nano-cavities on polymeric substrate. They are typically 300-nm deep, 800-nm wide and the possible change in their depth after modification, which I am going to measure, is about several to several tens of nanometer. I was wondering whether the AFM is capable to of telling the difference, as the modification would take several hours, and during that time others could have used the AFM or changed the cantilever. I would really like to get suggestions from those who know AFM well. Could anyone tell me your idea on the reproducibility of AFM? Concerning the experiments at different time, are they reliable on telling the change of several nanometers on the measure scale of several hundreds of nanometers? Also, will it affect much if the measurement last several days or the cantilever is heavily used or replaced? Any response will be highly appreciated. Thanks, Kangning 2012-02-27 kangning -------------- next part -------------- An HTML attachment was scrubbed... URL: From kangning at stanford.edu Mon Feb 27 15:38:51 2012 From: kangning at stanford.edu (kangning) Date: Mon, 27 Feb 2012 15:38:51 -0800 Subject: What do you think about the reproducibility of AFM?(Please forget the last email) Message-ID: <201202271538510702100@stanford.edu> Hi all, To avoid confusion on my last question I am resending a new one. Sorry for the spam. I am doing modification to a polymeric substrate and I want to track the change of the depth of a cavity on it. It is 300-nm deep, 800-nm wide and the possible change in depth after modification is about several to several tens of nanometer. In another word, I want to tell if the cavity changes from 300-nm deep to 305-nm deep, or from 300-nm deep to 295-nm deep. I was wondering whether the AFM is capable to of telling this difference, as the modification would take several hours, or even longer time so I can not do the measurement in a single run. I would really like to get suggestions from those who know AFM well. Could anyone tell me your idea on the reproducibility of AFM? Concerning the experiments at different time, are they reliable on telling the change of several nanometers on the measure scale of several hundreds of nanometers? Also, will it affect much if the measurement last several days or the cantilever is heavily used or replaced? Any response will be highly appreciated. Thanks, Kangning 2012-02-27 kangning -------------- next part -------------- An HTML attachment was scrubbed... URL: From rthowe at stanford.edu Mon Feb 27 15:57:47 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Mon, 27 Feb 2012 15:57:47 -0800 Subject: Pamela Bhatti seminar ... NOW in Clark Aud. Message-ID: <4F4C187B.9050209@stanford.edu> *MEMS-based Approaches to Overcoming Sensory Loss in the Auditory and Vestibular Systems* Presented by: *Prof. Pamela T. Bhatti* School of Electrical and Computer Engineering, Georgia Institute of Technology *Monday, February 27, 2012* *Clark Center Auditorium* *4:00 PM* *Abstract:* In the BioSystems Interface Laboratory we develop novel sensing and stimulating systems to overcome sensory loss. To enhance sound perception with cochlear implants, we have developed advanced thin-film intracochlear electrode arrays. Moving to the vestibular system, we pursue both an implantable and non-implantable systems. Analogous to a cochlear implant, we are developing a vestibular prosthesis to convey head rotation cues to the vestibular system through electrical stimulation of vestibular nerve fibers to overcome debilitating bilateral vestibular hypofunction. Complementing our work in implantable systems, we have developed a head worn angular motion monitoring system to aid patients in completing vestibular rehabilitation exercises at home. By utilizing a user-friendly interface to the system we hope to facilitate the transfer of patient measures to a clinic between rehabilitation sessions. *Short Bio:* Dr. Pamela Bhatti is an Assistant Professor in the School of Electrical and Computer Engineering at Georgia Tech in Atlanta, GA. She received a B.S. in Engineering Science (Bioengineering) from the University of California, Berkeley in 1989, an M.S. in Electrical Engineering from the University of Washington in 1993, and a Ph.D. in Electrical Engineering from the University of Michigan, Ann Arbor in 2006 with an emphasis on Micro-electro Mechanical Systems (MEMS). Before completing her Ph.D., she researched the detection of breast cancer with ultrasound imaging at the University of Michigan's Department of Radiology (1997-1999). Her industry experience includes embedded systems software development at Microware Corporation, Des Moines, IA (1996-1997), local operating network applications development and customer support at Motorola Semiconductor in Austin, TX (1994-1995), and research and fabrication of controlled-release drug delivery systems at Alza Corporation in Palo Alto, CA (1986-1990). Pamela received the NSF CAREER Award in 2011. Committed to translating technology to the clinical setting, she is a KL2 Scholar with the Atlanta Clinical and Translations Sciences Institute. -------------- next part -------------- An HTML attachment was scrubbed... URL: From mahnaz at stanford.edu Tue Feb 28 10:31:18 2012 From: mahnaz at stanford.edu (Mahnaz Mansourpour) Date: Tue, 28 Feb 2012 10:31:18 -0800 Subject: No Steam ( Cogen) Message-ID: <4F4D1D76.1090103@stanford.edu> Hello all, We have been informed that Cogen ( steam ) is down. You might start seeing shift in the focus with regard to the exposure time. Critical work should wait Non critical could continue, please do a test wafer. we will update you as soon as we have more information. mahnaz From ben.jian at arrayedfiberoptics.com Tue Feb 28 11:16:40 2012 From: ben.jian at arrayedfiberoptics.com (Ben Jian) Date: Tue, 28 Feb 2012 11:16:40 -0800 Subject: Can anyone sell me a fused silica/glass wafer of 0.6-0.7mm thickness? Message-ID: <4F4D2818.8050600@arrayedfiberoptics.com> Hi, I need one or two Pyrex or fused silica wafers for an experiment. The thickness should be from 600um to 700um preferably, and double side polished. Thank you for your attention. Ben From audet at stanford.edu Tue Feb 28 11:33:28 2012 From: audet at stanford.edu (Ross Audet) Date: Tue, 28 Feb 2012 11:33:28 -0800 Subject: Thursday, March 1: Lunch discussion with Dr. Giacomo Vacca, RSVP requested In-Reply-To: <001401ccf448$e29c2b90$a7d482b0$@stanford.edu> References: <001401ccf448$e29c2b90$a7d482b0$@stanford.edu> Message-ID: <004f01ccf64f$d9479c60$8bd6d520$@stanford.edu> There are still a few spots available for the lunch discussion on Thursday! Lunch discussion with Dr. Giacomo Vacca of Kinetic River Corp. Presented by the Stanford Photonics Research Center and the Stanford Optical Society Thursday, March 1, 2012 12 PM - 1 PM Nano 317 Space is limited. RSVP to stanford-photons at stanford.edu. Lunch will be provided to participants. Join us for an informal lunch discussion with Dr. Giacomo Vacca of Kinetic River Corp., a technical consulting company focusing on optics in a range of industries including medicine and the life sciences. Dr. Vacca will discuss career opportunities in industry for PhDs in optics and photonics, drawing on his experiences in positions in R&D, marketing, and business development in both startups and large companies. Additionally, he will discuss opportunities for scientists as independent consultants. Biography: Giacomo Vacca earned his B.A. and M.A. in Physics from Harvard University, and his Ph.D. in Applied Physics from Stanford University. His dissertation, under the guidance of Nobel Prize winner Bob Laughlin, introduced a new ultrafast optical technique for investigating microscopic fluid phenomena. >From 2000 to 2005 he worked in R&D and Marketing for two Silicon Valley optics startups. In 2005 he was recruited by Abbott Labs to lead their hematology research group in Santa Clara. There he developed a breakthrough cellular analysis technology, for which he received a Platinum Research Award. His most recent honors are having been elected to Senior Member of the Optical Society of America and to Research Fellow of the Volwiler Society at Abbott Laboratories. In 2010 he founded Kinetic River, a medical and life-science technology company providing consulting services and developing disruptive diagnostics and research products. He has been awarded 5 patents and has 19 more pending. To learn more about the Stanford Optical Society, visit http://photons.stanford.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From rthowe at stanford.edu Tue Feb 28 13:39:57 2012 From: rthowe at stanford.edu (Roger T. Howe) Date: Tue, 28 Feb 2012 13:39:57 -0800 Subject: seminar at 4:00, Allen 101X Peter Krulevitch J&J Message-ID: <4F4D49AD.7070403@stanford.edu> Innovation Within a Large Medical Device Company: a Journey from Microtechnology R&D to User Needs Driven Design Dr. Peter Krulevitch Research Fellow, Janssen R&D *Abstract: * Over the past ten years, the R&D environment inside large medical device companies has changed considerably, making it increasingly challenging to develop innovative products from within. Spending on early development projects has declined, including an end to funding for projects not directly tied to product launches. At the same time, the allowable time before R&D innovations must impact sales has decreased. As a result, the model for driving internal innovation has evolved. This presentation will cover one engineer's R&D experience at Johnson & Johnson over a period of nearly ten years. Initial efforts focused on the application of microtechnology to medical devices, including Nitinol thin films aimed at cardiovascular applications and electrokinetic patch pumps for drug delivery.Mid-term projects applied low risk microtechnology with increased attention to user needs, emphasis on industrial design as well as technology, and focus and accountability for near term results. Projects included insulin infusion sets and subcutaneous sensor inserters with flexible etched Nitinol/polymer hybrid needles, injection molded micropumps with etched valves for drug delivery, and drug delivery management systems. Recently, efforts have drifted away from technology-based innovation in favor of patient-centric design-based innovation, focusing on simple, intuitive to use devices. An example of a self-administration device for subcutaneous injections will be presented. *Short Bio: * Peter Krulevitch is a Research Fellow at Janssen R&D, the pharmaceutical development organization within Johnson & Johnson, where he leads a small team responsible for early development of devices for subcutaneous, intramuscular, intravenous, intranasal, and pulmonary delivery of large and small molecule drugs. He joined Janssen from J&J's device sector, where he led a group focused on applying microtechnology to medical devices, and worked with LifeScan and Animas on devices for the treatment of diabetes. Prior to J&J, he was a Research Engineer at Lawrence Livermore National Laboratory's Center for Microtechnology, where he worked on microfluidic systems for cell-based diagnostics and flexible electrode arrays for retinal implants, among other projects. He received his Ph.D. in Mechanical Engineering from UC Berkeley (1994), where he studied the mechanical properties of polycrystalline silicon at the Berkeley Sensor & Actuator Center with Professors Roger Howe and George Johnson. Dr. Krulevitch is co-inventor on approximately 50 issued patents. -------------- next part -------------- An HTML attachment was scrubbed... URL: From audet at stanford.edu Tue Feb 28 13:58:44 2012 From: audet at stanford.edu (Ross Audet) Date: Tue, 28 Feb 2012 13:58:44 -0800 Subject: Thursday, March 1: Lunch discussion with Dr. Giacomo Vacca, RSVP requested References: <001401ccf448$e29c2b90$a7d482b0$@stanford.edu> Message-ID: <00b801ccf664$244f21b0$6ced6510$@stanford.edu> Thank you for your interest in the lunch event. All available spots have now been filled. From: Ross Audet [mailto:audet at stanford.edu] Sent: Tuesday, February 28, 2012 11:33 AM To: 'studentosa at lists.stanford.edu'; 'gl-res-assts at lists.Stanford.EDU'; 'gl-postdocs at lists.Stanford.EDU'; 'labmembers at snf.stanford.edu' Subject: Thursday, March 1: Lunch discussion with Dr. Giacomo Vacca, RSVP requested There are still a few spots available for the lunch discussion on Thursday! Lunch discussion with Dr. Giacomo Vacca of Kinetic River Corp. Presented by the Stanford Photonics Research Center and the Stanford Optical Society Thursday, March 1, 2012 12 PM - 1 PM Nano 317 Space is limited. RSVP to stanford-photons at stanford.edu. Lunch will be provided to participants. Join us for an informal lunch discussion with Dr. Giacomo Vacca of Kinetic River Corp., a technical consulting company focusing on optics in a range of industries including medicine and the life sciences. Dr. Vacca will discuss career opportunities in industry for PhDs in optics and photonics, drawing on his experiences in positions in R&D, marketing, and business development in both startups and large companies. Additionally, he will discuss opportunities for scientists as independent consultants. Biography: Giacomo Vacca earned his B.A. and M.A. in Physics from Harvard University, and his Ph.D. in Applied Physics from Stanford University. His dissertation, under the guidance of Nobel Prize winner Bob Laughlin, introduced a new ultrafast optical technique for investigating microscopic fluid phenomena. >From 2000 to 2005 he worked in R&D and Marketing for two Silicon Valley optics startups. In 2005 he was recruited by Abbott Labs to lead their hematology research group in Santa Clara. There he developed a breakthrough cellular analysis technology, for which he received a Platinum Research Award. His most recent honors are having been elected to Senior Member of the Optical Society of America and to Research Fellow of the Volwiler Society at Abbott Laboratories. In 2010 he founded Kinetic River, a medical and life-science technology company providing consulting services and developing disruptive diagnostics and research products. He has been awarded 5 patents and has 19 more pending. To learn more about the Stanford Optical Society, visit http://photons.stanford.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From sixram at stanford.edu Tue Feb 28 21:09:56 2012 From: sixram at stanford.edu (Han-Bo-Ram Lee) Date: Tue, 28 Feb 2012 21:09:56 -0800 Subject: Mathematica Message-ID: Hi All Can anyone help me for Mathematica issue? I'm now working on some numerical calculations with multiple integrations and fitting to data points but I can't figure out the error message. Thanks, Boram Han-Bo-Ram Lee, Ph.D Bent Research Group Department of Chemical Engineering Stanford University Mail : Rm 113, Stauffer III Bldg., 381 North South Mall, Stanford, CA 94305 Email : sixram[at]stanford.edu (http://stanford.edu) or sixram[at]gmail.com (http://gmail.com) WWW : bentgroup.stanford.edu/ (http://bentgroup.stanford.edu/) -------------- next part -------------- An HTML attachment was scrubbed... URL: