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January 1997

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Subject:
Re: Gold as Etch Resist
From:
"cabeles" <[log in to unmask]>
Date:
Wed, 29 Jan 97 17:10:00 PST
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     From my past experience, I have found that when using gold as an etch 
     resist, the best way to avoid slivers is to run jobs using 1/2 oz base 
     foil.  I was never able to characterize the increase in etch speed to 
     successfully etch thicker foil.  When I got jobs that had a build that 
     utilized 1 and 2 oz copper foil, we usually ended up with slivers.
     
     


______________________________ Reply Separator _________________________________
Subject: Gold as Etch Resist
Author:  [log in to unmask] at corp
Date:    1/29/97 3:41 PM


     Hello,
        Please post information, experiences, and anecdotes, on using 
     electroplated gold as an etch resist. In particular how is the etch 
     rate controlled. How can the undercut be reduced to eliminate the 
     chance of slivers.
        (Gold/Nickel/Copper/FR4 :The copper gets etched)
     Thanks
     Rich
     
     
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