On my electroless Nickel/immersion gold bare-board, I have seen few places
with brown/copper looking surface. I have following questions in this regards.

(1) Is it due to not having Nickel and gold going directly on the copper
    pads?
(2) What is the reliability risk after the board assembled if above is correct
    I mean gold going directly on the copper pads?
(3) We have specified immersion gold over Nickel. Looking the color which
    is not 100% copper looking, can immersion gold be plated/applied on
    copper or may be process might be changed to electrolytic gold?

re,
ken patel
______________________________________________________
Ken Patel                       Phone:  (408) 490-6804
1708 McCarthy Blvd.             Fax:    (408) 490-6859
Milpitas, CA 95035              Beeper: (888) 769-1808

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