I doubt they are actually SAC, more likely just Sn. Passive components have
been finished in Sn for years, the only difference now is that ROHS
compliance has reduced the Pb content added for anti whiskering, or replaced
it with a tiny amount of Bi.
Regards
Mike Fenner
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
Pb-free: www.Pb-Free.com
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Indium Corporation
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Registered office: (Not for correspondence)
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David Fischer
Sent: Friday, June 20, 2008 6:18 PM
To: [log in to unmask]
Subject: [TN] SAC Plated Passives with SnPb Solder Paste
Good Day,
I am aware of the nuances of mixing SAC solder ball BGA's with SnPb solder
paste, but are there any concerns, cautions or steps to take when soldering
SAC plated passives (chip resistors, chip caps) to a PCB using SnPb solder
paste?
Thanks,
David Fischer
Manufacturing Engineering Manager
ATEOps NPI
Teradyne, Inc
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