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March 1997

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Date:
Thu, 20 Mar 97 11:03:29 MST
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     Dear Mr. Westheimer,
        Please contact Mr. John Whitley of my company. (602)-268-3461.
     Thank You
     Richard Olsen
------------------------------------------------------------------
     Richard Olsen                Telephone (602)-232-9154
     Continental Circuits Corp.   Main      (602)-268-3461
     3502 East Roeser Road        Fax       (602)-268-0208
     Phoenix Arizona              Pager     (602)-310-6245
     85040-2905                   Internet  [log in to unmask]
     USA                    I make circuit boards,what do you do?
------------------------------------------------------------------


______________________________ Reply Separator 
_________________________________ Subject: Photo Via
Author:  Richard Olsen at C3-MAILROOM Date:    3/19/97 11:52 AM


From: Scott Westheimer
Date: 3/19/97

We are working with Ciba's epoxy and building Photovia's. We have 
encountered a strange problem with the plated copper over the epoxy. The 
peel strengths over laminate areas are better than the peel strengths over 
oxided copper areas. Have any of you, that are either using or are 
evaluating this process, encountered the same? Also we see that KMno4 
attack is inconsistent. Same time temperature and concentration and 
processed the same way. Any information on this and how you are running in 
production would be helpful.
     
Thanks,
     
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