Michael,
If the electromagnetic wave is traveling in parallel on the nickel the loss
will be given mainly by resistivity, frequency, and surface roughness but if
the wave is traveling so it impinges onto the nickel surface, lthe loss wil
be 99.9% refective and that loss can be 80-90 dB if the thickness is 3 x the
classical skin depth thickness.
Hope this helps if not we can try again.
Richard Haynes
609-497-4584


-----Original Message-----
From: Mcmaster, Michael <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Monday, March 08, 1999 8:35 PM
Subject: [TN] Effect of Surface Finish on RF Boards


>I'm trying to evaluate the impact of nickel plating (under gold) on RF
>boards.  The archives have some postings from 3 years (or more) ago, but
>nothing quantitative.
>
>Can anybody share the latest results/opinions or point me in the
>direction of any good sources for information about the effect of
>surface finish (nickel) on electrical performance (loss) on RF boards?
>
>Thanks.
>
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