Hi all,

I need some serious help here. I am experiencing what I believe to be a galvanic reaction 
on parts Electroless gold plated at an outside source.  The source claims that certain areas are not plating due to random residue left on the surface. However, after researching the problem we discovered that the problem is not as random as initially thought. When a non plated condition appears, it is an entire trace that is not plated. All pads and holes on that one trace do not take gold. I have only seen this occur in black oxide many years ago where the oxide would not cover one trace. I have since forgotten the mechanics of what causes this reaction or how we fixed it. I seem to remember it having something to do with silver but I just don't remember.  Could someone please help?

Ed Cosper   

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