Hi All,

We are currently assembling an RF product (first time build) that utilizes
several fine pitch devices, leadless fine pitch devices and a great many
0402's.  The board finish is currently HASL and as the volume ramps up there
is concern that defects related to the fine pitch and HASL will result in
unacceptable costs.

We prefer to use ENIG as a surface finish for non-RF products that fit this
Bill.  I seem to recall reading something on this very Net that mentioned
nickel or ENIG being a no no for RF ccts.

I am not an RF guy and would love to get some feedback as to the effects of
various board finishes on RF products.  Perhaps even recommendations as to a
"good" finish that will give better yield than HASL.

Regards,
Martin Butcher,

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