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| How to overcome PCB Gold finger oxidation ? |
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Gold finger has indifferent oxide in in theory, true oxidation may be copper.
Since nickel / gold insufficient coverage, microporous generated. Thus, bleeding from the underlying copper pollution caused by brown color is called oxidation, gold is a very stable in the air, this problem is nickel-gold plating quality should be improved.
Another condition is that the circuit board in the nickel and gold plating baking, organic matter back to stick to the gold finger area, causing pollution of color, this problem should be oven cleaning and maintenance and Volatile Organic Compounds circuit board used in the production begin to improve. Or there may be other dirt adhering on the surface, they have different colors like.
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