Reducing agent and method for the electroless deposition of silver
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United States of America Patent
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Apr 12, 1988
Grant Date -
N/A
app pub date -
May 18, 1987
filing date -
May 18, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A brighter, more uniform deposit of electroless silver is achieved over a wider temperature range by employing as a reducer a compound represented by the general formula: R.sup.2 --(CHR.sup.1).sub.n --CH.sub.2 OH where n is two (2) to seven (7), R.sup.2 is represented by the formula COOH or CH.sub.2 R.sup.1, each R.sup.1 group is independently selected from the class consisting of OH, NH.sub.2, NHCH.sub.3, NHC.sub.2 H.sub.5 or NHC.sub.3 H.sub.7 and at least one of the R.sup.1 groups is NH.sub.2, NHCH.sub.3, NHC.sub.2 H.sub.5 or NHC.sub.3 H.sub.7. Preferred reducers are N-methylglucamine, d-glucamine and glucosaminic acid.
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