From mtang at stanford.edu Fri Aug 3 14:18:06 2007 From: mtang at stanford.edu (Mary Tang) Date: Fri, 03 Aug 2007 14:18:06 -0700 Subject: Odor in the lab this morning Message-ID: <46B39B8E.1090602@stanford.edu> Labmembers -- As many of you know, there was a chlorine-like odor noted in the lab this morning, around 9 am. The lab was evacuated and the safety team assembled. The possible causes were isolated and the lab reopened around 10:45 am. Some plasma etch equipment remains down while we continue to investigate (you may check on Coral to see which ones). If you were using equipment and need your enable time adjusted on Coral, please contact your favorite staff person who will help you take care of this. Thanks for your patience -- and please help us keep SNF a safe place to work! Your SNF staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility CIS Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From kapurp at stanford.edu Fri Aug 3 17:39:10 2007 From: kapurp at stanford.edu (kapurp at stanford.edu) Date: Fri, 03 Aug 2007 17:39:10 -0700 Subject: conductive rubber rings for electrical contact Message-ID: <20070803173910.4hgw69y7m2u8kgg0@webmail.stanford.edu> Dear All, Does anyone have conductive rubber rings that facilitate contacting metal on top of silicon with a metallic ring (connected to a mesurement set-up). We are trying to contact a silicon wafer with metal on top (with uneven topography) using a distributed contact such as a metallic ring. The conductive rubber by conforming to both underlying topography and the ring on the top will hopefully facilitate a nicer contact than we are getting by just placing the metal ring on top of silicon wafer. I would appreciate if I could either borrow these rings in case you have them for 2 days and/or if you could suggest a possible vendor who can turn it around in 1 or 2 days. thanks much, -- Pawan Kapur From mtang at stanford.edu Fri Aug 3 19:14:59 2007 From: mtang at stanford.edu (Mary Tang) Date: Fri, 03 Aug 2007 19:14:59 -0700 Subject: First Aid/CPR/AED - Learn how to save a life! Message-ID: <46B3E123.1070909@stanford.edu> Greetings labmembers: On Tuesday, August 28, we?ve arranged for a First Aid/CPR/AED class to be offered here, on-site. This 8-hour course will cover basic first aid and simple emergency procedures that you could use to save someone?s life. This course will also cover Cardio-Pulmonary Resuscitation (CPR) and use of the Automated External Defibrillator (AED) ? which are awfully handy skills to know, when someone?s heart stops. If you had First Aid ages ago, it?s well worth doing again because the recommended best-know-practices (and survival rates) have changed a LOT. Also, we have two AED systems in this building, so it?s handy to know how to use one (or have someone on-hand who does!) One statistic quoted by EMT professionals is that use of CPR alone may have a survival rate of 2% of less, whereas the combination of CPR and AED has a survival rate of 80% or greater. The class will be held on August 28, from 8 am - 4 pm. Completion of this course gives you a certification that is valid for two years. Anyone may register for this course. The cost for the class is $65. If you are a Stanford person, your department may cover the cost of this class (and STAP funds certainly will). Class fees may also be transferred to your Coral account, upon request. If you are interested in registering for the class, please get in touch with me. Thanks for your attention! Mary -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility CIS Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From shott at stanford.edu Mon Aug 6 06:06:14 2007 From: shott at stanford.edu (John Shott) Date: Mon, 06 Aug 2007 06:06:14 -0700 Subject: Disk Usage .... Message-ID: <46B71CC6.9090400@stanford.edu> An HTML attachment was scrubbed... URL: From shott at stanford.edu Mon Aug 6 13:01:16 2007 From: shott at stanford.edu (John Shott) Date: Mon, 06 Aug 2007 13:01:16 -0700 Subject: List of Publications .... Message-ID: <46B77E0C.5020501@stanford.edu> An HTML attachment was scrubbed... URL: -------------- next part -------------- An embedded message was scrubbed... From: "Yoshio Nishi" (by way of Paul Rissman ) Subject: FW: Collection of Publications Date: Thu, 24 May 2007 19:56:06 -0700 Size: 12109 URL: From kattsai at stanford.edu Mon Aug 6 14:16:00 2007 From: kattsai at stanford.edu (Katherine Tsai) Date: Mon, 6 Aug 2007 14:16:00 -0700 Subject: spectrophotometer needed Message-ID: <1c62e49d0708061416g2022fda3k5a23fa2115804836@mail.gmail.com> Dear Labmembers, Does anyone have a UV-visible spectrophotometer in their lab that I could use? Thanks, Katherine Tsai -------------- next part -------------- An HTML attachment was scrubbed... URL: From tberg at stanford.edu Wed Aug 8 08:23:09 2007 From: tberg at stanford.edu (Ted Berg) Date: Wed, 08 Aug 2007 08:23:09 -0700 Subject: TGO testing Tomorrow Morning Message-ID: <46B9DFDD.4030104@stanford.edu> Hello All, We will be testing the TGO system tomorrow morning so there will be alarms and possible brief gas shutdowns. Sorry for the inconvenience.ted From vishal at thorrn.com Wed Aug 8 09:58:52 2007 From: vishal at thorrn.com (Vishal Singhal) Date: Wed, 8 Aug 2007 09:58:52 -0700 Subject: Strip SPR 220-7 Message-ID: Hi, I have quartz wafers with Aluminum and BCB on them. I need to strip SPR 220-7 from them. Does anyone have experience doing this? Any ideas or suggestions would be helpful. Thanks, Vishal -------------- next part -------------- An HTML attachment was scrubbed... URL: From mkoto at stanford.edu Fri Aug 10 14:09:36 2007 From: mkoto at stanford.edu (mkoto at stanford.edu) Date: Fri, 10 Aug 2007 14:09:36 -0700 Subject: APTES In-Reply-To: <46B71CC6.9090400@stanford.edu> References: <46B71CC6.9090400@stanford.edu> Message-ID: <20070810140936.jlet2u7hpcpwsc8g@webmail.stanford.edu> Hi all, Does someone have APTES(3-AMINOPROPYLTRIETHOXYSILANE)? If someone have, please share small amount of it. I need it immediately and ordered already, but it seems to take a few days for delivery. Please let me know about the above. Thanks, Makoto *************************************************** Makoto Koto Visiting Scholar 476 Lomita Mall 244 McCullough Building Stanford, CA 94305-4045 *************************************************** From rebeccat at stanford.edu Sat Aug 11 19:16:12 2007 From: rebeccat at stanford.edu (Rebecca Taylor) Date: Sat, 11 Aug 2007 19:16:12 -0700 Subject: request to borrow a small amount of NRD or Mesitylene this weekend? Message-ID: <54b5bbc9c72cb1e3ca5178b4932cfac7@stanford.edu> Hello Labmembers, Our ME342 group is working with Photopatternable Silicones (in the MERL cleanshop) and have discovered that we do not have the proper developer on hand this weekend. Does anyone have any Negative Resist Developer (NRD) or other Stoddard Type of Solvent that we might be able to borrow this weekend? Mesitylene would also work for our purposes. We are looking for about 4 ounces of solvent. If you are around and have some solvent to lend, we would be very grateful. Thanks and have a great weekend, -rebecca taylor From mtang at stanford.edu Mon Aug 13 16:13:41 2007 From: mtang at stanford.edu (Mary Tang) Date: Mon, 13 Aug 2007 16:13:41 -0700 Subject: SNF Staff Activity Message-ID: <46C0E5A5.7040000@stanford.edu> Hi everyone -- Just wanted to let you all know that most SNF staff will be unavailable tomorrow (Tuesday) afternoon from about 11:15, as we'll be on a staff outing to SLAC. There will be a skeleton crew of dedicated staffers on hand. Just in case, however, other emergency contact numbers will be posted on the board outside the gowning room. For non-emergencies, SNF staff will be back to regular hours on Wednesday, ready, willing, and able. Thanks for your attention -- Your SNF staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility CIS Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From barlian at stanford.edu Tue Aug 14 14:44:06 2007 From: barlian at stanford.edu (A. Alvin Barlian) Date: Tue, 14 Aug 2007 14:44:06 -0700 Subject: You're invited to E342 Poster Reception, Thurs 8/16, 3-5pm Message-ID: <91763A47-E0E3-4B53-9A4C-3B9CD63A2581@stanford.edu> Dear friends, It's this time of the year again! We'd like to invite you to join us for E342 (Micro/Nano Systems Design and Fabrication Laboratory) poster reception on Thursday, 8/16 from 3-5 pm in building 530 (Mechanical Engineering Dept. building) room 126. This year, we have 11 students, divided into 4 project teams. They have been working on their projects in and outside of the fab in the past 5 months. The projects are: 1. Stretchable Micro Electrode Arrays 2. Thermotaxis Platform for C. Elegans 3. Vertical Atomic Force Microscopy 4. Surface modifications (nanotopography) for Piezoresistive Cantilever Sensors We'll provide the usual happy hour stuff (chips, snacks, beer, soda, etc)! Please come, check out their latest results, and mingle around! =) We hope to see you there, Cheers, Alvin From slkim at stanford.edu Tue Aug 14 14:57:00 2007 From: slkim at stanford.edu (Samuel Kim) Date: Tue, 14 Aug 2007 14:57:00 -0700 Subject: Does anyone have SU-8 developer? Message-ID: Hi all, Does someone have SU-8 developer? The common stock has run out. If someone have, I would like to get some amount for this evening's experiment. Thanks in advance for your help, Sam -------------- next part -------------- An HTML attachment was scrubbed... URL: From candacec at stanford.edu Tue Aug 14 16:10:57 2007 From: candacec at stanford.edu (Candace Kay Chan) Date: Tue, 14 Aug 2007 16:10:57 -0700 Subject: Ge etching? Message-ID: <46C23681.50700@stanford.edu> Hi all, I was just wondering if anyone knew of a good way to selectively etch Ge. My sample has Ge, Cu3Ge, and Cu. I only want to remove the Ge. Some of the more oxidizing solutions will dissolve Cu faster than Ge, and I haven't found KOH to be effective. Thanks in advance, Candace -- Candace K. Chan Ph.D. Student, Department of Chemistry Stanford University McCullough Building Room 209 476 Lomita Mall Stanford, CA 94305 -------------- next part -------------- An HTML attachment was scrubbed... URL: From jonroth at stanford.edu Tue Aug 14 18:06:22 2007 From: jonroth at stanford.edu (jonroth at stanford.edu) Date: Tue, 14 Aug 2007 18:06:22 -0700 Subject: Orals, Jonathan Roth, Tue Aug 21st 3PM Message-ID: <20070814180622.s6rp24b922qscoww@webmail.stanford.edu> Electroabsorption Modulators for CMOS Compatible Optical Interconnects in III-V and Group IV Materials Jonathan E. Roth Department of Electrical Engineering Stanford University Ph.D. Oral Examination Advisor: Professor David A. B. Miller Location: Center for Integrated Systems Extension (CIS-X) Auditorium Date: Tuesday, August 21, 2007 Time: 3:00 PM (Refreshments 2:45 PM) While electrical systems excel at digital information processing, photonics is useful in systems for high-bandwidth, low-loss signal transmission. As photonics technology has become increasingly widespread and been deployed at shorter distance scales than traditional long-haul networks, it becomes more important to integrate photonics components with electrical integrated circuits efficiently. Most currently deployed photonics technologies utilize substrates other than silicon and materials incompatible with CMOS manufacturing. Integration strategies have included flip-chip bonding of a chip for electronics and one for optics for two-dimensionally arrayed interconnections. More recently silicon-based photonics technologies have been developed which may allow fabrication of photonics and electronics on the same substrate using conventional CMOS foundry processes. Recently we discovered a strong quantum-confined Stark effect in germanium quantum wells, which can be used to create efficient optoelectronic modulators on silicon substrates. In this talk I will describe the first optoelectronic modulators using germanium quantum wells, devices that we designed, fabricated, and tested. Our results include a modulator operating in the telecommunications C-band, and requiring a drive voltage swing of only 1V. I will also describe the first chip-to-chip optical transceiver operating in the C-band that used a transmitter device flip-chip bonded to CMOS. From masaharu at stanford.edu Tue Aug 14 18:21:45 2007 From: masaharu at stanford.edu (Masaharu Kobayashi) Date: Tue, 14 Aug 2007 18:21:45 -0700 Subject: My wallet lost Message-ID: <20070814182145.nwckxgut1rdw4w4k@webmail.stanford.edu> Dear all, I apologize this sudden email. Yesterday's night, I lost my wallet somewhere. I cannot identify where I dropped it off, yet. I couldn't live without the wallet. Wallet color is green and black, with white logo. It has my Stanford ID, also. If you have any tiny information, Please, please let me know. I really appreciate your help. Best regards, Masaharu Kobayashi Ph.D student Electrical Engineering Stanford University masaharu at stanford.edu From mbaran at stanford.edu Thu Aug 16 10:26:32 2007 From: mbaran at stanford.edu (Maureen Baran) Date: Thu, 16 Aug 2007 09:26:32 -0800 Subject: 2007-2008 Parking Permits are Available Message-ID: <20070816172633.102D84CC59@smtp3.stanford.edu> Dear Lab Members, It's that time of year, when you need to renew your Stanford University Parking Permit. Please make every effort to do so before August 31, 2007. There ISN'T any grace period, that is just a rumor that goes around every year. Also, this year Parking and Transportation is not accepting 2007-08 Department Sponsorship forms with photo copied department signatures. I will not have the sponsorship forms hanging outside my cubicle; you will have to ask me for them however, I will have the 2007-08 Parking Permit Applications there. You will need both forms (sponsorship form and parking permit application) filled out before going down to Parking and Transportation and purchasing your parking permit. Thank you, Maureen PS The current rate for a parking ticket issued on campus is $35.00. Maureen Baran Stanford Nanofabrication Facility Lab Services Administrator mbaran at stanford.edu 650-725-3664 -------------- next part -------------- An HTML attachment was scrubbed... URL: From erik.anderson at stanford.edu Thu Aug 16 13:07:22 2007 From: erik.anderson at stanford.edu (Erik Anderson) Date: Thu, 16 Aug 2007 13:07:22 -0700 Subject: borrow temperature measurement device? Message-ID: <46C4AE7A.7010905@stanford.edu> Hi all, I am looking to borrow a device that can measure the temperature of a liquid droplet to within 1 degree Celsius of accuracy or better. Does anyone have such a measurement device I could borrow or come use for a few hours? Either an RTD (resistance thermal detector) or a thermocouple with a type T (and not type K) probe would work. Thanks. Erik From ofidaner at stanford.edu Fri Aug 17 10:14:29 2007 From: ofidaner at stanford.edu (Onur Fidaner) Date: Fri, 17 Aug 2007 10:14:29 -0700 Subject: Ph.D. Orals - Wednesday (08/22) 10:00 AM Message-ID: <20070817101429.51reezzypi9s48k8@webmail.stanford.edu> ************************************************************************ Stanford University Ph.D. Oral Examination Photonic Integration for Interconnects: from Chip-scale to Long Distance Onur Fidaner Research Advisor: Professor David A. B. Miller Department of Electrical Engineering Location: Center for Integrated Systems Extension (CIS-X) Auditorium Date: Wednesday, August 22, 2007 Time: 10:00 AM (Refreshments served at 9:45 AM) ************************************************************************ Photonics technology has been widely used in long-haul optical networks and it is now considered as an alternative to electrical interconnects in CMOS chips because electrical interconnects cannot be scaled for fundamental reasons. In this talk I will explain two different technologies for optical interconnects, at two very different distance scales. The first one is an InP-based integrated photonic switch that can be used in multifunctional and reconfigurable optical network nodes. The second technology is an optical link on silicon employing Ge/SiGe quantum well modulators and detectors on silicon. Both of these technologies monolithically integrate multiple photonic components on the same chip to improve performance and reduce cost. The first technology offers a photonic integration platform on III-V substrates. We demonstrate a photonic switch that intimately integrates quantum-well electroabsorption modulators with photodetectors such that the detectors directly drive the modulators. Such an intimate integration provides a compact optical-electronic-optical (o-e-o) conversion and eliminates the necessity of propagating high-speed electrical signals in cascaded discrete electronic and photonic components. These switches offer multiple network functions such as wavelength conversion, electrical packet switching, and optical packet switching. The second technology utilizes the recently discovered strong quantum-confined Stark effect (QCSE) in germanium - silicon germanium quantum well structures, which can be grown on silicon substrates. QCSE offers an efficient physical mechanism to make CMOS-integrated electroabsorption modulators. In this talk I will describe the first waveguide electroabsorption modulators and photodetectors using Ge/SiGe quantum well system. In particular, I will demonstrate the first optical link on silicon using the quantum well technology. From mtang at stanford.edu Fri Aug 17 13:24:48 2007 From: mtang at stanford.edu (Mary Tang) Date: Fri, 17 Aug 2007 13:24:48 -0700 Subject: Acetic acid smell in the litho area Message-ID: <46C60410.8010007@stanford.edu> Hi everyone -- Just a warning that the smell of acetic acid (vinegar) has been reported in the litho area. This is due to the silicone RTV adhesive being used by the contractors for installation of the new Suss coater. Although we believe odor is NOT harmful, it can be annoying and uncomfortable. Therefore, we ask that everyone avoid using the litho area until the odor has dissipated. Please watch for the notices posted on the litho doors. Your SNF staff -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility CIS Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu From shinbh93 at stanford.edu Mon Aug 20 13:27:01 2007 From: shinbh93 at stanford.edu (Byungha Shin) Date: Mon, 20 Aug 2007 13:27:01 -0700 Subject: high purity chemicals Message-ID: <1B5A8EDC6F694E50BAC3144BDD285BB2@BShinPC> Hi all, Does anyone know a vendor selling high purity chemicals, HCl and NH4(OH) in particular? Thanks, Byungha -------------- next part -------------- An HTML attachment was scrubbed... URL: From atomada at stanford.edu Tue Aug 21 11:14:19 2007 From: atomada at stanford.edu (atomada at stanford.edu) Date: Tue, 21 Aug 2007 11:14:19 -0700 Subject: Diff 3" cassette missing Message-ID: <20070821111419.ymy92mhsjf5css4w@webmail.stanford.edu> Dear Labmembers, Today I was starting my process and unfortunately I was not able to proceed since the only usable 3" cassette for standard thickness wafers is missing from the top of wb-diffusion where it usually dwells. If you know where it is or accidentally misplaced it please return it and help the lab to be a nice place to work! Thank you! Astrid From gracewu at stanford.edu Wed Aug 22 11:23:51 2007 From: gracewu at stanford.edu (Grace Wu) Date: Wed, 22 Aug 2007 11:23:51 -0700 Subject: Fwd: Blow-Out Sale at Surplus Property Sales this Friday! Message-ID: <6.2.5.6.2.20070822112131.047625a8@stanford.edu> >X-Sieve: CMU Sieve 2.3 >Delivered-To: gracewu at stanford.edu >X-Original-To: smartannouncements at lists.stanford.edu >Delivered-To: smartannouncements at lists.stanford.edu >X-Original-To: abc-research at mailman.stanford.edu >Delivered-To: abc-research at lists.stanford.edu >X-Mailer: QUALCOMM Windows Eudora Version 6.2.5.6 >Date: Wed, 22 Aug 2007 11:08:40 -0700 >To: abc-research at lists.stanford.edu >From: Lisa Teresi-Forgatsch >Subject: Blow-Out Sale at Surplus Property Sales this Friday! >X-BeenThere: abc-research at lists.stanford.edu >X-Mailman-Version: 2.1.9 >X-BeenThere: smartannouncements at lists.stanford.edu >Sender: smartannouncements-bounces at lists.stanford.edu > >All: > >Stanford University Surplus Property Sales is having a huge blow out >sale Friday August 24, 2007. Prices have never been this low. Our >warehouse has never been this full. We have good quality items in-stock. > >OPEN TO THE PUBLIC from 9am-12pm & 1-4pm (Closed for lunch 12-1pm.) >650-723-3001 >CASH ONLY > >Located at 340 Bonair Siding (near Parking & Transportation) >http://surplus.stanford.edu > >Items for sale include: > * Couches > * Desks > * Tables > * Bookshelves > * Hoist weight machines > * Scifit upright & recumbent bikes > * Dining tables > * Meeting tables > * File cabinets > * Chairs > * Desk top & Laptop Computers > * Flat panel monitors > * Projectors > * Scientific equipment > * Biomedical equipment > * Office supplies > * Wires, resisters , hardware & more >Sale every Wednesday 9am-12pm & 1-4pm > >Question? Contact Laura Granville, SPS Manager >granville at stanford.edu >650-723-3001 >650-714-5263 cell >650-723-5656 fax >--++**==--++**==--++**==--++**==--++**==--++**==--++**== Grace Wu Financial and Administrative Manager Stanford Nanofabrication Facility Stanford University Allen Center for Integrated Systems 420 Via Palou Mall, CIS 130 Stanford, CA 94305-4070 Office (650) 724-2909 Fax (650) 723-7300 gracewu at stanford.edu http://snf.stanford.edu Confidentiality Notice: This e-mail transmission, and any documents, files or previous e-mail messages attached to it, may contain confidential information that is legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this message is strictly prohibited. If you have received this transmission in error, please immediately notify me by reply e- mail or by telephone at (650) 724-2909, and destroy the original transmission and its attachments without reading them or saving them to disk. -------------- next part -------------- An HTML attachment was scrubbed... URL: From dwitte at stanford.edu Wed Aug 22 13:08:08 2007 From: dwitte at stanford.edu (Daniel Witte) Date: Wed, 22 Aug 2007 13:08:08 -0700 Subject: Indium solder? Message-ID: <8d3fd7200708221308vff1f29co6f0a825adcfd96a6@mail.gmail.com> Hi all, I'm trying to solder to gold, and I'm wondering if anyone has some indium solder I could borrow today or tomorrow. (Or if you know of any local suppliers I could run down and buy some from.) Any help much appreciated! Cheers, Dan. -------------- next part -------------- An HTML attachment was scrubbed... URL: From erichall at stanford.edu Thu Aug 23 17:11:19 2007 From: erichall at stanford.edu (Eric Hall) Date: Thu, 23 Aug 2007 17:11:19 -0700 Subject: SU-8 2000.5 Message-ID: <605b98f60708231711g68488288yffbd6c202a84d87d@mail.gmail.com> I am considering incorporating SU-8 2000.5 into my process, but I would like to try it out before buying a whole bottle of it. I've seen several user-owned bottles in the lab, and I was wondering if anyone would let me try out a small amount of it on a wafer or two. If you can spare this small amount, just send me an e-mail letting me know so and what name is on the bottle. When I use it (it will be within the next week), I will let you know. Thank you! Eric erichall at stanford.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From ifushman at stanford.edu Fri Aug 24 16:08:26 2007 From: ifushman at stanford.edu (Ilya Fushman) Date: Fri, 24 Aug 2007 16:08:26 -0700 Subject: CW tunable laser around 910-930 nm Message-ID: Hi All, We're looking for a tunable CW laser in the range of 910-930 nm. If anyone has one of these that can be loaned for an experiment, please let me know, Thanks, ilya -- Ilya Fushman Applied Physics Stanford University cvitae.org/ilya/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From masaharu at stanford.edu Tue Aug 28 01:17:44 2007 From: masaharu at stanford.edu (Masaharu Kobayashi) Date: Tue, 28 Aug 2007 01:17:44 -0700 Subject: yellow lamp is lit Message-ID: <20070828011744.mlufpgje64ejos4w@webmail.stanford.edu> Dear all, When I drained HCl+H2O at wetbench silicide at 1am, the yellow lamps were lit, which means over-limit of drain system. If anyone would plan to clean wafers from now, I am sorry for the inconvinience. To staff: I really appreciate if you fix this problem. Best regards, Masaharu Kobayashi From cmgas at stanford.edu Tue Aug 28 10:42:47 2007 From: cmgas at stanford.edu (Christophe Antoine) Date: Tue, 28 Aug 2007 10:42:47 -0700 Subject: PhD Orals, Christophe Antoine, Fri Sept 7th, 3pm, Ginzton AP200 Message-ID: <138e8dd60708281042i27005f87n985a2dc17d4228b@mail.gmail.com> Ph.D. Oral Examination Reconfiguring the flow of light: micromachined deformable optical gratings for multiplexers and tunable lasers Christophe Antoine Department of Electrical Engineering Stanford University Advisor: Professor Olav Solgaard Date: Friday, September 7th, 2007 Time: 3:00pm (Refreshments at 2:45pm) Location: Ginzton Lab, Applied Physics Bldg - Room 200 Abstract: In optical fiber communication networks, the growth of high-bandwidth and on-demand applications will require a dynamic allocation of resources. Reconfigurability becomes hence a key attribute for next-generation optical components. Using optical micro-electro-mechanical systems (optical MEMS) technology, deformable gratings can be used to build such adaptive systems. In this talk, the design, fabrication and characterization of tunable blazed gratings (TBGs) are first presented. A TBG is a one-dimensional stairway-like array of individually-addressable piston mirrors. The fabrication of a TBG combines KOH etching to define the mirrors and deep reactive ion etching (DRIE) to create the electrostatic actuators. Then, the architecture for a 1xP cyclically reconfigurable optical multiplexer is described with a closed-form analytical model for the grating transmission under a simple actuation scheme requiring only (P-1) control voltages. The implementation of a 1x3 tunable demultiplexer in the telecommunication C-band demonstrates the validity of the concept and the theoretical model. Finally, a deformable grating is used as the external reflector in a wavelength-tunable external cavity semiconductor laser. Combining a model for the grating transmittance with a two-mirror and a three-mirror cavity analytical model, the wavelengths of the resonant modes for the cavity are determined and the lasing wavelength is predicted. Laser tuning over the full grating free spectral range, across internal cavity modes and across external cavity modes is achieved. -- -------------------------------------------------- Christophe Antoine PhD Candidate in Electrical Engineering Email: cmgas at stanford.edu (temporary) antoine-snowden at stanfordalumni.org (permanent) From mihirt at stanford.edu Wed Aug 29 17:42:49 2007 From: mihirt at stanford.edu (mihirt at stanford.edu) Date: Wed, 29 Aug 2007 17:42:49 -0700 Subject: Missing Cascade package Message-ID: <20070829174249.p1kzcxlfcwwkck4g@webmail.stanford.edu> Hi all, I know this isn't quite the scope of this list, but I'm not on the CIS building list. I ordered a package in late June from Cascade Microtech. It was received in the building on July 5th. It was addressed to Gabrielle Scofield and picked up from the mail room, but Gabrielle doesn't have it and I can't track down who does. If you've seen this package, please let me know. It is addressed to Gabrielle Scofield, and it is something like 6" x 3" x 4". Thank you! -- Mihir Tendulkar Applied Physics PhD Candidate Nishi Group, Stanford University From mbaran at stanford.edu Thu Aug 30 10:49:12 2007 From: mbaran at stanford.edu (Maureen Baran) Date: Thu, 30 Aug 2007 09:49:12 -0800 Subject: 2007-2008 Department Sponsorship Form / Parking Permit Message-ID: <20070830174913.2DD5E4BDE8@smtp2.stanford.edu> Just a Reminder!! Stanford will start enforcing the new 2007/ 2008 Parking Permits as of September 4th due to the fact that parking isn't enforced over the week-ends and this Monday, September 3rd is a campus holiday. Please don't wait until the last minute... Maureen Maureen Baran Stanford Nanofabrication Facility Lab Services Administrator mbaran at stanford.edu 650-725-3664 -------------- next part -------------- An HTML attachment was scrubbed... URL: From mbaran at stanford.edu Fri Aug 31 11:12:44 2007 From: mbaran at stanford.edu (Maureen Baran) Date: Fri, 31 Aug 2007 10:12:44 -0800 Subject: Use of Shipping and Receiving back gate door Message-ID: <20070831181244.C16754C965@smtp1.stanford.edu> Dear All, Someone after hours is going through Shipping and Receiving and leaving the area through the chain link door to the left the locked gates. This chain link door is to be used as an exit - only in case of an emergency and there is a note clearly posted to that affect right on the front panel. Once you open this chain link door it will set off the silent alarm until someone with the proper key can lock it again. This has been happening a lot and it has now become a security issue. Please help us to keep the community of people within the building and lab safe after hours, by using an already well established door to exit the building. We are all inconvenienced by the construction on Via Pueblo however; this will only be for a short time. Thank you in advance for your consideration to this matter. Sincerely, Maureen Maureen Baran Stanford Nanofabrication Facility Lab Services Administrator mbaran at stanford.edu 650-725-3664 -------------- next part -------------- An HTML attachment was scrubbed... URL: From edmyers at stanford.edu Fri Aug 31 11:35:03 2007 From: edmyers at stanford.edu (Ed Myers) Date: Fri, 31 Aug 2007 11:35:03 -0700 Subject: Toxic Gas Testing Message-ID: <6.2.5.6.2.20070831112523.0444dbf0@stanford.edu> All, On Tuesday, Sept. 4th (8am-3pm) and Wednesday, Sept. 5th (8am-12noon) there will be testing of the TGO alarm system. Announcements will be made to the lab members in the SNF facility prior to any testing. You are not required to evacuate the fab or the building during these times unless you are told to do so. The testing results from the upgrade of several gas senors to a more stable sensor. The new model of sensors will not be as susceptible to false readings due to temperature and humidity changes. Lab members will see a number of staff reservations on tools during these times. During the testing it is possible the gas cabinets will be shut down preventing the flow of process gases to these tools. To prevent any tools from aborting, these tools will be off-line during the testing. If you have any questions or concerns, please feel free to contact a SNF staff member. From huangzb at stanford.edu Fri Aug 31 16:07:02 2007 From: huangzb at stanford.edu (Zubin Huang) Date: Fri, 31 Aug 2007 16:07:02 -0700 Subject: SU-8 adhesion problem Message-ID: <006501c7ec23$a4475fe0$d97640ab@RPLZubin> Hi, I'm having some problems of SU8 adhesion and hope someone could offer advice. My substrate is 25mm*50mm VWR cover glass with thickness about 0.13mm to 0.16mm. Following is my process: 1 Clean the cover glass with Aceton, Methanal, IPA 5min each in ultrasonic bath. 2 O2 plasma treating for 10min in MRC (20sccm O2, 100mTorr, 50W) 3 Yes Oven for singe and HMDS treatment. 4 Coat 30s 3500rpm SU8 2010 at headway with 10um thick. 5 Bake 4min @ 95C 6 Exposure 4.5s *3 cycle with 30s spacing at Karlsuss; 7 Bake 5min @ 95C 8 Dev 3min immersion. 9 IPA rinse for 10s and blow dry. After the process I found the small features of 10um size on my structure came off and changed position on the substrate. I would like to have advice on improving the adhesion between the SU-8 and the glass substrate. Thanks, Zubin From mtang at stanford.edu Fri Aug 31 17:04:57 2007 From: mtang at stanford.edu (Mary Tang) Date: Fri, 31 Aug 2007 17:04:57 -0700 Subject: SU-8 adhesion problem In-Reply-To: <006501c7ec23$a4475fe0$d97640ab@RPLZubin> References: <006501c7ec23$a4475fe0$d97640ab@RPLZubin> Message-ID: <46D8ACA9.50102@stanford.edu> Hi Zubin -- Normally, SU-8 adheres very well to SiO2. Two things you might consider: 1. Make sure your exposure is long enough, so that the SU8 at the substrate is fully cured. For very thick SU8 (though your 10 microns is not very thick), some people use an optical filter (lay it on top of the mask) to filter out sub-i-line wavelengths to improve curing down to the substrate surface. 2. Glass quality and the method by which the glass is formed can make a big difference. Glass has a lot of sodium and may also have boron, Mg and Zn. It is often not very uniform in composition and "dopant" segregation to surfaces is especially if the glass is cast or rolled from a nearly molten state. High concentrations of sodium can lead to adhesion problems. Slight etching in BOE or other HF can remove areas of high concentration (although this might make poorer quality glasses hazy.) Etching also roughens up the surface a little which helps in adhesion. Good luck! Mary -- Mary X. Tang, Ph.D. Stanford Nanofabrication Facility CIS Room 136, Mail Code 4070 Stanford, CA 94305 (650)723-9980 mtang at stanford.edu http://snf.stanford.edu Zubin Huang wrote: > Hi, > > I'm having some problems of SU8 adhesion and hope someone could offer > advice. > > My substrate is 25mm*50mm VWR cover glass with thickness about 0.13mm > to 0.16mm. > > Following is my process: > > 1 Clean the cover glass with Aceton, Methanal, IPA 5min each in > ultrasonic bath. > 2 O2 plasma treating for 10min in MRC (20sccm O2, 100mTorr, 50W) > 3 Yes Oven for singe and HMDS treatment. > 4 Coat 30s 3500rpm SU8 2010 at headway with 10um thick. > 5 Bake 4min @ 95C > 6 Exposure 4.5s *3 cycle with 30s spacing at Karlsuss; > 7 Bake 5min @ 95C > 8 Dev 3min immersion. > 9 IPA rinse for 10s and blow dry. > > After the process I found the small features of 10um size on my > structure came off and changed position on the substrate. I would like > to have advice on improving the adhesion between the SU-8 and the > glass substrate. > > Thanks, > Zubin