Nickel oxidation causing adhesion problems?
We are having a problem with an immersion gold flash lifting off the surface of our nickel plating during a gold wedge bonding application. An Auger depth profile showed 15-18 atomic % oxygen peak at the interface of the nickel/gold plating. How much oxide can be tolerated without causing an adhesion problem?Catherine H [last name deleted for privacy by Editor]
- Colorado Springs, Colorado, USA
If you have a lots of wetting agent in the nickel solution you get a bad adhesion of the gold deposit. If the nickel is to much passivate you should try to activate in sulfuric acid 10 % for 1-2 minutes and neutralize it potassium solution before gold plating.
3rd Generation in Plating
Consultant - Arvika, Sweden
My name's Deniz I'm working in turkey my job electroforming,nickel coating. Sorry I can little English. Your problem's solution: surface coating MgO2 vacuum coating
ok byedeniz selen
HOLOGRAPHIC MATERIALS - turkey
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