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Electroplating an etched board with some other (preferably silver-colored) metal Answered

I was wondering if anyone would have any insight on my problem. I'm trying to electroplate an etched copper PCB with something that oxidizes less-readily and has a silver-ish color. Any ideas on what metal to use/how to get it into solution? Thanks, -Muffin



10 years ago

the tin-plating solutions are usually electroless (not electroplating.) Otherwise you'd need to plate traces before you etch so you could get electrical connectivity to all the traces. A web search for "electroless tin plating" will get you lots of info, including patents. Most of the solutions seem to involve:
  • Stannous chloride (about 0.5%)
  • Thiourea (about 5%)
  • sulfuric acid (about 1.5%)

Thanks! I saw all of those sites already, though, and I was looking for the chemical formula, not the product.