Metal alloy sulfate electroplating baths
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United States of America Patent
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May 13, 2003
Grant Date -
Feb 7, 2002
app pub date -
May 21, 2001
filing date -
Mar 19, 1999
priority date (Note) -
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Abstract
The use of alkali metal, alkaline earth metal, ammonium and substituted ammonium salts of alkyl and alkanol sulfonic acids as additives in pure metal and metal alloy sulfate electroplating baths has a number of unexpected benefits including wider useful current density range, improved appearance and in the case of tin improved oxidative stability. The metals and alloys include but are not limited to tin, nickel, copper, chromium, cadmium, iron, rhodium, ruthenium, iron/zinc and tin/zinc.
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