Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1991-11-27
1993-06-22
Bell, Mark L.
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 126, 106 127, C23C 1836, C23C 1838
Patent
active
052213285
ABSTRACT:
This invention relates to a method of controlling orthophosphite ion concentration in a hypophosphite-based electroless metal plating bath, comprising the steps of contacting the plating bath with a yttrium or a lanthanide series metal salt, and removing orthophosphite ions from the bath. The methods of the present invention provide effective means for controlling phosphite ion concentration in electroless metal plating baths and especially electroless nickel plating baths. The methods of the present invention provide means for increasing pH and removing orthophosphite ions from the plating bath.
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Derwent Abstract 86-192773/30, Jun. 1986.
The Systems Y.sub.2 O.sub.3 --P.sub.2 O.sub.5 and Gd.sub.2 O.sub.3 --P.sub.2 O.sub.5, J. Electrochem Soc.: Solid-State and Technology, Jul. 1980, pp. 1550-1554.
Bishop Craig V.
Loar Gary W.
Thomay Marlinda J.
Bell Mark L.
Einsmann Margaret
McGean-Rohco, Inc.
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