Hi Genny,

The bad news is that silver won't make any good, while a good one is
that it PROBABLY won't make it worse either, I haven't seen any direct
data which would show that Ag can increase the susceptibility to
Au-embrittlement.  

However, the presence of any solder in the contact area isn't a very
good thing.

Regards,

Vladimir

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Wednesday, February 06, 2008 3:43 PM
To: [log in to unmask]
Subject: [TN] SAC on gold pins

So,...
During assembly, say that you see SAC solder wicking up the pins of a
finepitch surface mount header onto the contact area which is
gold-plated.  The gold-plated header normally mates with gold socket
connector.  
What would be the reliability issues with SAC solder in contact with the
gold socket?  Does the silver in the solder mitigate any of the
tin-to-gold issues I have been reading about?

Genny

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