Subject: | |
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Reply To: | TechNet E-Mail Forum. |
Date: | Thu, 9 Aug 2001 23:21:05 +0100 |
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Hi Rick,
could be;
a) oxide on the joint
b) change in the composition of the original solder through elemental
contamination from your plating (pad/component) during reflow giving
differential freezing, resulting in a change in the surface appearance
c) the solder you've been supplied with is 'out of spec' (do you have a
spec?) and is freezing differentially
d) all of the above
e) none of the above
Best regards,
Andrew Hoggan
BBA Associates Ltd
www.bba-associates.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Rick Howieson
Sent: 09 August 2001 21:53
To: [log in to unmask]
Subject: [TN] Gold/Paste
We are seeing cloudy/grayish smt solder joints on boards with immersion gold
or soft body gold plating. Is this common???
Thanks,
Rick
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