Nickel hypophosphite solutions containing increased nickel concentration
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United States of America Patent
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Aug 31, 1999
Grant Date -
N/A
app pub date -
Jan 6, 1998
filing date -
Feb 19, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to aqueous solutions containing Ni cation and hypophosphite anion which have a Ni cation concentration greater than 36 grams/liter. Such solutions have utility in electroless nickel plating baths and processes as make-up solutions and replenishing solutions. The increased concentration of Ni cation results from the addition of the nickel salt of an alkyl sulfonic acid to the solution.
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