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Sorry
to weigh in so late on this subject. In the high reliability world, there
is at least one (maybe more) fabricator capable of plating a highly controlled
Ni/Au/Pd finish. I never learned their name, but they competed with one of
my former employers. If my memory is correct, this is the preferred finish
for down hole drilling circuitry. This finish has also been specified on
various high technology (high layer count, fine line, high reliability)
products. Many of those (non-down hole) prints also permit ENIG as an
alternate.
My
understanding is that for anything other than extreme operating environments
there isn't much difference between the two finishes. Perhaps one of the
other contributors with more high reliability experience would care to
comment. Technet formerly had a member employed in the down hole
instrumentation industry.....pity he isn't contributing any
longer.
Don
Vischulis
I have a new board shop
promoting their Electro-Plated Ni/Pd/Au (hard
or soft gold) surface finish over our existing [ENIG] boards. We have not had any issues with our
current assemblies using [ENIG]. I
am requesting any advice or information on Electro-Plated Ni/Pd/Au and if it
would be worth switching to it. Any
advice would be greatly appreciated, thank you in
advance.
SCOTT
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