2% PMMA in the lab OK to use 2% non-standard batch

James Conway jwc at snf.stanford.edu
Mon Oct 13 13:34:29 PDT 2008

Greetings Byoung Il Lee  and Ebeam Lab Users :

It is OK to use up the remaining lot batch that we have in the cleanroom 
that is marked NON-Standard Batch.
  It is a MicroChem Corp manufacturers resist evaluation lot that I have 
used for several experiments in the recent past and it has been fully 
Dose to clear is 100 - 115 µC/cm**2
Its performance is exactly the same as the other batch of 2% 950K PMMA 
in anisole we normally stock in the Ebeam lab.

I will also bring in a new bottle of the previous batch we have stocked 
in the lab that was used up over the weekend.

All the Best,

James Conway

Byoung Il Lee wrote:
> Dear James,
> I have a question regarding 2% 950k PMMA.
> I was going to deposit 2% PMMA and use Raith tonight, but couldn't find the bottle. 
> Is the Non-std 2% PMMA in the yellow cabinet the same thing as the old ones? If so, can I use it?
> If not, I am wondering when I could get the standard 2% PMMA that I used to use.
> Thank you, have a great weekend,
> Byoungil 
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