Question about the wafersaw
mtang at stanford.edu
Tue May 16 22:58:47 PDT 2006
Oh fiddlesticks... Thanks Josh, for the info and detail. I'm sure it
will help in troubleshooting...
Josh Ratchford wrote:
> Hi Mary and wafersaw users,
> I was so excited about the wafersaw being up that I decided to use it
> immediately. Things worked very well for me and I was able to dice up
> my bare Si wafer into 2 cm x 2 cm chips. Unfortunately the
> "theta stop" error started prompting again when I pressed unload to
> remove my diced wafer.
> Sorry for bearing the bad news.
> On 5/16/06, *Mary Tang* <mtang at stanford.edu
> <mailto:mtang at stanford.edu>> wrote:
> Hi Il Woong and others --
> The wafersaw is UP! It turns out that Ed Myers had seen this problem
> years ago and had been told it was an EPROM problem. On hearing this,
> Cesar reset the EPROM board and it works. Not that this makes any
> sense, but now the motor is rotating in the right direction and
> fine. So, the wafersaw is now available and working well.
> Il Woong Jung wrote:
> >Hi Mary,
> >I have just talked to the crystal shop in Ginzton.
> >The wafersaw there has been down for several months now.
> >It does not seem like it will be fixed anytime soon.
> >It seems like vendors will be the way to go temporarily.
> >Il Woong
> >-----Original Message-----
> >From: Mary Tang [mailto:mtang at stanford.edu
> <mailto:mtang at stanford.edu>]
> >Sent: Tuesday, May 16, 2006 3:27 PM
> >To: Seoung-Jai Bai; wafersaw at snf.stanford.edu
> <mailto:wafersaw at snf.stanford.edu>
> >Subject: Re: Question about the wafersaw
> >Hi everyone --
> >Sorry about the wafersaw. The good news is that the theta/rotation
> >motor is OK (repairing this, I understand, is a nightmare.) However,
> >the reason why the motor isn't rotating properly isn't clear, but
> >suspicion is the driver board. Elmer and Cesar are going to try
> a few
> >other things to ensure that the limit switches are OK, and then
> order a
> >replacement board if nothing obvious shows up.
> >If you desperately need dicing services, there is a dicing saw in
> >Ginzton labs, which I believe is available as a service to Stanford
> >researchers. There's also a website which lists some local
> dicing services:
> >One that is not list is American Dicing (different from America
> >Precision Dicing, which a lot of people use.)
> >Again, sorry about the problem, but Elmer and Cesar are on the job.
> Mary X. Tang, Ph.D.
> Stanford Nanofabrication Facility
> CIS Room 136, Mail Code 4070
> Stanford, CA 94305
> mtang at stanford.edu <mailto:mtang at stanford.edu>
More information about the wafersaw