Briefly:
1) Send back to supplier as their problem
2) Yes: have seen de/non wetting on perimeter and middle of spotted stains
(where marking most evident= thicker?)
3) N/A

Good Luck
Mike Fenner
Indium Corporation of Europe
T: + 44 1908 580 400
F: + 44 1908 580 411
M: + 44 7810 526 317
W: www.indium.com


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Bev Christian
Sent: Thursday, July 12, 2001 11:37 PM
To: [log in to unmask]
Subject: [TN] Staining on Gold


TechNetters,
I have checked the archives and have not been successful in finding
sufficient info on the titled subject.  Either I have not done a diligent
enough search or the info is not there.  So, here are my questions.
1) If you were presented with varying amounts of what looks like water
stains on immersion gold pads how would you determine its composition?  No
guesses now, I can do that.  I want to know how people have actually done
it!  Also, I am not referring to "purple plague" but just slightly off color
gold.
2) Has anyone ever been able to correlate amount of staining to
solderability issues?  Or is it a non-issue?
3) Has anyone seen staining cause problems with respect to keypad electrical
continuity?

regards,
Bev Christian
Research in Motion

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