I'm having a hard time believing that the size of the ho
Robert,

I'm having a hard time believing that the size of the hole has anything
to do with Immersion Silver.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Croslin, Robert
Sent: Tuesday, May 27, 2008 10:57 AM
To: [log in to unmask]
Subject: [TN] 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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