To all Technetters,

I think this topic has been covered before and I apologize if this is so 
but I will ask the question again.

I want to use immersion gold over nickel for my PCB.  While this is not 
unusual in itself, I'm more concerned with the use of the gold as keypad 
contacts.  Since the gold is very thin to begin with (around 4-5 
microinches), will this degrade over time to where there is no more gold 
present on the contact pad?  

I have read varying articles that state that it is or isn't a problem and 
would like to know what others have experienced with this alternative 
surface finish.

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