Dave,

     We see this on fairly frequent basis.  Usually needed if a MIL-type
     requirement of ".0003" as deposited" is specified.  Also, if other
     selective metalization, such as soft gold, is required in other areas
     of part, HASL becomes a hassle (sorry, I had to), with masking and
     such.

     Andy Slade


______________________________ Reply Separator _________________________________
Subject: [TN] FAB: Selective Solder Stripping
Author:  "D. Rooke" <[log in to unmask]> at SMTPLink-Hadco
Date:    06/18/98 7:37 AM


I was approached today by a request as to whether we could supply selective
solder strip boards. These boards were reflowed selective solder with hard
gold plated fingers. I hadn't heard of this for a number of years since the
advent of HASL and I was wondering whether there is still widespread use of
this process. Can any users or manufacturers of selective strip confirm its
use in their operations?

Just curious....


Dave Rooke
Viasystems Canada - Pointe Claire

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