Electroless gold plating solution and electroless gold plating method
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United States of America Patent
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Jul 8, 2014
Grant Date -
May 24, 2012
app pub date -
Apr 15, 2011
filing date -
Jul 20, 2010
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Abstract
It is an object of the present invention to provide an electroless gold plating solution capable of directly subjecting a plated coating film made of an underlying metal such as nickel or palladium to gold plate processing, of forming a thick gold plated coating film having a thickness of 0.1 μm or more, of forming a uniform gold plated coating film, and of safely performing plating work. The present invention relates to an electroless gold plating solution comprising: a water-soluble gold compound; and hexahydro-2,4,6-trimethyl-1,3,5-triazine or hexamethylenetetramine. Preferably, the electroless gold plating solution comprises 0.1 to 100 g/L of hexahydro-2,4,6-trimethyl-1,3,5-triazine or hexamethylenetetramine.
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