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Date: | Wed, 10 Aug 2011 08:56:43 -0400 |
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Good Morning Mark,
The classic answer ... it depends ...
Is there an industry standard for Pb-free HASL? IPC does not appear to
have a specification.
The drawing or procurement document might define the material used ...
It would be expected that the HASL would be a common soldering material
which would not be pure Sn.
Pure Sn would probably be a difficult material to use for HASL due to
its tendency to react with Cu.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Woolley, Mark D.
(Mark)
Sent: Tuesday, August 09, 2011 6:19 PM
To: [log in to unmask]
Subject: [TN] Lead Free HASL and whiskers
I have a question now that our company is beginning to use lead free
HASL as a solderability finish. I am seeing a few (<5%) filled vias on
each board I examine. Does anyone know if the manufacturer's are using
pure tin, and if they are has anyone looked at tin whiskers from HASL
filled vias?
Thanks,
mark
mark
Mark Woolley |PTRL Laboratory | Avaya | 1300 West 120th Ave |
Westminster, CO 80234 USA |
Voice (Lab): (303) 538-2166 | email: [log in to unmask] |
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