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Date: | Mon, 21 Oct 96 13:18:22 PST |
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Typically BURNT copper would NOT be acceptable due to the fact that
tensile strength, elongation, and ductility will be severly
comprimised.
Regards,
Alan B. Cochrane
Multek Inc.
______________________________ Reply Separator _________________________________
Subject: FAB, ASSY: "Copper Burning" during plating
Author: [log in to unmask] at INTERNET_GATEWAY
Date: 10/21/96 10:54 AM
This morning, I was looking at some boards that had pads covered with
copper bumps, blisters, pimples, or whatever you want to call them. I've
been told this was a product of copper "burning", resulting when boards
are plated with current too high. Is this burnt copper unacceptable? I
didn't see any pictures in IPC-A-600 to suggest it wasn't, but don't like
the looks of the plating. Any comments? Thoughts from assemblers would
be welcome, too.
Lou Hart
Compunetics Quality Assurance
412-858-6117
.
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