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Subject:	Re: Gold as Etch Resist
From:	[log in to unmask]
Date:	Thu, 30 Jan 97 09:15:57 EST
Content-Type:	text/plain
Parts/Attachments:	text/plain (45 lines)

     We do not have a problem with slivers when using 1/2oz foil.
     However we do have one customer who uses an ultra sonic cleaning 
     process during assembly. This created some slivering. We have gone to 
     1/4oz material on outer layers for that customer.

     Kim 
______________________________ Reply Separator _________________________________
Subject: Gold as Etch Resist
Author:  [log in to unmask] at SMTPLINK-HADCO
Date:    1/29/97 9:17 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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