More PRS-1000 needed this weekend

Zhiping Zhang zzp at
Sun Jun 24 09:55:15 PDT 2012

Calvin, I used Wetbench Metal yesterday before you and the chemical were all new. And PRS1000 is supposed to be changed only once in a month. Why did you still drain it? If you really need to process some wafers, you can use a clean bicker to contain enough PRS1000 and clean your wafers it after heating it up to 40oC. The dump rinse and spin dry procedures would be the same. 


----- Original Message -----
From: calvinli <calvin at>
To: labmembers at
Sent: Sun, 24 Jun 2012 03:02:30 -0700 (PDT)
Subject: More PRS-1000 needed this weekend

Hi Sir:

I wonder if there is anyone who happened to be here this Sunday and have the authorization to get more PRS-1000 to the chemical store area.

Thanks a lot


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