Transene etchants request (PSE300SF, PSE200, PSE300)

Mary Tang mtang at
Fri Jan 13 17:11:28 PST 2006

Hi all --

This is just a note to let everyone know that Ed, Mahnaz, Uli, and I 
approved the use of the PSE300 and PSE300SF Transene etchants at 
wbgeneral and wbgaas, with the following provisions:

1.  PSE300SF and PSE300 contain ethylene diamine, so any possible 
contact with concentrated sulfuric, nitric, or other oxidizing acids 
must be avoided. 
2.  When planning to use these etchants, the entire bench must be 
reserved for the period of use, so that no other labmembers will plan to 
share the bench.
3.  When using these etchants, yellow Hazard tape should be attached 
across the front of the bench, with a note, to warn others from sharing 
the bench.  The bench must be enabled.
4.  Used etchant and first rinse should be collected locally in 
chemically compatible waste containers and labeled appropriately as 
hazardous waste.  They should be placed in the appropriate area of the 
chemicals pass-through for disposal.

As PSE200 is a KOH formulation, it is approved as per standard KOH 



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

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