Brian-

I take it you actually mean a solder plated press fit connector, rather
than soldered.  As long as the hole is sized correctly you should not
have a problem with long term reliability--HOWEVER,  HASL is MUCH better
for this kind of application because the solder prevents "needles" from
splitting off of the pins and running amok.  I have had trouble with
ImAg finish with solder plated press fit due to this.  I am sorry to say
that I didn't get a picture of one of the "needles", but they are
extremely thin and very strong, since they are breaking off from the
corners of the stamped pin.  In my case, they actually went UNDER the
adjacent solder mask and shorted the pin to adjacent metal.  Hopefully
the ENIG is more helpful for suppressing this phenomenon than the ImAg.

Good Luck,

Wayne

>>> [log in to unmask] 9/12/2006 11:23:51 am >>>

Good morning all,
      Are there any particular reliability concerns when press-fitting
a
soldered contact (SN63) into a plated barrel with an ENIG surface?
What
might the outcome of this be over the long term? Is this an accepted
practice? Would this be acceptable in a class 3 military application?

Thank you for your input.

Brian Guidi
Senior Product Engineer
Teledyne Printed Circuit Technology
Tel: (603) 889-6191  X:310
Fax: (603) 886-2977
E-mail: [log in to unmask]

Visit us @ http://www.tetpct.com

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