I have had some parts returned for a contamination/tarnishing on parts with
gold plating.  I have attached a photo of the problem.  These parts are sent
out for plating and we are having a difficult time identifying a root cause.
The problem seems to be different from a "black pad" problem.  The parts
were plated approximately three months ago, and the tarnish is very evident.
I would appreciate some feedback.
Thank you,
 <<contaminated gold plating.jpg>>

Kristopher J. Keating
Technical Service Engineer
Circuit-Wise, Inc.
400 Sackett Point Rd.
North Haven, CT 06473
Tel. (203) 281-6511
Fax (203) 287-8409

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