TEST WAFERS is a must

Mahnaz Mansourpour mahnaz at stanford.edu
Thu Feb 26 15:32:56 PST 2009

Hello all,

Few of you have complained about the the ring after development left on 
the wafer. With the lack of humidity control I am not sure what to tell 
you  but please run a test wafer  and develop it and look at it to make 
sure things are okay.

I  will try my best to run few wafers through litho area and confirm 
things. Here is the quote from facility.


We were informed this morning by Cogen that they shut down the pump that 
supply tower
water to our glycol chiller yesterday for maintenance. It   will be down 
for about ten days.
This mean that we won't have dehumidification capability to the 
photolith area while the
pump is down.

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