Very easy to replate Immersion Silver. Bath was probably low on Nitric.
I have boards wrapped in paper in my desk drawer from 3 years ago and every
6 months I take one out and solder it. My board in May was the first I saw
of any solderability issues. But if it's a concern...have them re-run them.
Simplicity since no stripping is needed.
Dave C.
-----Original Message-----
From: Richard Kraszewski [mailto:[log in to unmask]]
Sent: Wednesday, June 16, 2004 9:13 AM
To: [log in to unmask]
Subject: [TN] Yellow Discoloration of Immersion Silver Boards
We are seeing yellow discoloration of Immersion Silver Boards right out
of the package from our board house. They seem to solder fine, however
this is causing some concern with our customer. I suspect that it could
be a thin film of silver bromide or silver carbonate both which are
yellow powders.
Any one seen this before?
What is it?
How does the board house remedy this situation?
Any associated concerns or other bits of wisdom?
I would truly appreciate any input.
Rich Kraszewski
Advanced Manufacturing Engineer - KEDS
Phone: 260.925.8919
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