Hi Rick - take a look in the TechNet archives - there was a pretty good
thread discussing the pros/cons of Sn62 versus Sn63 in terms of tombstoning
and wetting a few weeks back.

Dave Hillman
Rockwell Collins
[log in to unmask]




Rick Thompson <[log in to unmask]>@ipc.org> on 10/29/2002 06:55:00 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
       to Rick Thompson <[log in to unmask]>

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Subject:    Re: [TN] Round Pads for 0402 Parts?


Steve,

Any feedback is appreciated.  Are you saying that you've been able to
document a reduction in tombstoning on 0402's using 2% silver solder paste?
Hadn't heard of that one. Anybody else using it with these results?

Rick Thompson


===== Original Message from [log in to unmask] (TechNet E-Mail Forum.) at
10/29/02 4:37 pm
>Hi Rick!
>
>I'll get back to you tomorrow with some pad geometries that have worked
well
>here...don't trust my memory (getting senile, ya' know...hehehe)
>
>Have you tried using a 2% silver solder paste yet? I'd recommend it very
>highly!!
>Believe me, it makes a HUGE difference!!!!
>
>-Steve Gregory-
>
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Rick Thompson

Sr. SMT Process Engineer
SMTEK International, Inc.
+1 (805) 532-2800
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