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From: Scott B. Westheimer
Date: 9/17/96
Subject: Entek 106
When panels are first gold plated and then S/M the pads appear OK. When the
panels are S/M and then gold plated they are tarnished around the edges.
The gold process is electrolytic. In the pass I can recall problems with
S/M residue that leaches onto the gold surface during plating that would
cause this anomaly in the plated area. How to confirm, analysis has been
done that shows carbon at different levels as you scan the pads. Inputs
would be appreciated.
Thanks
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