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May 2008

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Subject:
From:
"Croslin, Robert" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Croslin, Robert
Date:
Tue, 27 May 2008 10:58:00 -0400
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text/plain
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Sorry, forgot to sign this.  Laughing too hard at the Message From The
Queen, I guess. 


Bob Croslin
The Nielsen Company

-----Original Message-----
From: Croslin, Robert 
Sent: Tuesday, May 27, 2008 10:57 AM
To: 'TechNet E-Mail Forum'
Subject: PTH's With Immersion Silver

We've been using immersion silver on our boards for quite a while with
great success, but in a recent run of a new product, we had the boards
come in with the PTH's used to mount RCA and audio connectors smaller
that usual.  The parts came in on the large end so it became very
difficult for the operator to insert them into the board.  Both holes
and parts were in tolerance and the holes were specified at the
recommended diameters.  Our CM has a woman who spent 20 years working in
pcb fab houses and she tells me that it's not at all unusual to have IS
boards with reduced ID's on the holes as opposed to HASL.  Has anyone
else experienced this?  If this is the case, we'll have to adjust for
this in the future, but it would be useful to know if this was an
anomaly or a normal condition?

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