Fire hazard

Mary Tang mtang at
Thu Feb 18 12:12:01 PST 2010

Thanks Tom --

This is really helpful.  Jim,/Uli -- can we rewire the power reset?


Thomas O'Sullivan wrote:
> I am admitting a mistake I made this morning, in the hopes that we can 
> help prevent others from making the same one.  Fortunately my mistake 
> was caught before a more significant problem developed:
> (this is from my wbgaas problem report)
> I arrived to use the GaAs wetbench this morning, enabled, and pressed 
> the POWER RESET button because I desired to use the DI water faucet.  
> The previous user had left the hot plate temperature set on, and there 
> was a cleanroom wipe also left on the hot plate.  Since the reset 
> button powers everything on, the hot plate began to heat.  The wipe 
> was burned on the hotplate, and the surface needs cleaning from the 
> charred wipe.  
> I admit that I should have checked the hot plate was off after hitting 
> the POWER RESET button (as trained), but it is easy to forget since I 
> had no desire to use the hot plate.  I think it would be better to 
> have the DI water (and aspirator) functional by enabling on Coral, 
> rather than having to hit the reset button.  That would  prevent a 
> potentially hazardous situation if another user makes the same 
> mistake.  Note this is how wbgen operates (there is no need to turn on 
> the power to the hot plate in order to get water / aspirator).
> Thanks,
> Tom

Mary X. Tang, Ph.D.
Stanford Nanofabrication Facility
CIS Room 136, Mail Code 4070
Stanford, CA  94305
mtang at

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