Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1989-12-01
1990-12-25
Group, Karl
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 118, 427304, C23C 1800
Patent
active
049799886
ABSTRACT:
An aqueous autocatalytic electroless gold plating composition having improved stability and which can plate gold directly onto gold or on nickel at an excellent rate is provided, the composition having a pH within the range of about 10 to about 14 and comprising about 0.002 to about 0.02M of a water-soluble alkali metal monovalent gold cyanide complex, about 0.01 to about 0.1M of a water-soluble alkali metal cyanide, about 0.1 to about 1.0M of a carbonate compound, about 0.01 to about 0.1M of a first reducing agent selected from the group consisting of water soluble alkali metal borohydrides and water soluble amine boranes, and about 0.01 to about 1.0M of a second reducing agent selected from the group consisting of hydrazine and hydrazine derivatives.
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Davis Jr. James C.
Deshmukh Sudhir
General Electric Company
Group Karl
Pittman William H.
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