Jim McVittie mcvittie at cis.Stanford.EDU
Tue May 13 09:24:07 PDT 2003

Drytek Users,

Attached is a Word file giving the details of using F-22 (CHClF2) as a
replacement for F-115 for poly-Si etching. We looked at a number of
Freons. Of these F-22 gave the best results however it is not as good as
F-115 was in it has a bit more undercut. Shortly, I will send out a 
summary of the results that we have for using F-22 with SF6 for Si 

James P. McVittie	                Senior Research Scientist
Allen Center for Integrated Systems     jmcvittie at stanford.edu
Stanford University             	Tel: (650) 725-3640	
Rm. 336, 330 Serra Mall			Fax: (650) 723-4659
Stanford, CA 94305-4075	
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