Palladium plating solution
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United States of America Patent
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Feb 15, 2011
Grant Date -
Sep 6, 2007
app pub date -
Feb 27, 2007
filing date -
Mar 3, 2006
priority date (Note) -
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Abstract
The invention provides a plating solution capable of forming a palladium plating film which can further improve solder characteristics in surface treatment of a composition made of a nickel plating film, a palladium plating film and a gold plating film on a surface of a conductor formed from a metal such as copper. In a palladium plating solution of the invention containing a soluble palladium salt and an electrically conductive salt having a liquid composition containing germanium, the amount of the soluble palladium salt is 0.1 g/l to 50 g/l in terms of a reduced value of palladium metal, the amount of the electrically conductive salt is 10 g/l to 400 g/l and the amount of the germanium is 0.1 mg/l to 1000 mg/l.
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