Cyanide-free electrolyte composition, and method for the deposition of silver or silver alloy layers on substrates
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United States of America Patent
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Dec 15, 2015
Grant Date -
Feb 25, 2010
app pub date -
Oct 9, 2007
filing date -
Oct 9, 2006
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Abstract
The invention relates to a cyanide-free electrolyte composition for depositing a silver or silver alloy layer on a substrate as well as a method for depositing such layers with the help of said cyanide-free electrolyte composition. The electrolyte composition according to the invention comprises at least one silver ion source, a sulfonic acid and/or a sulfonic acid derivative, a wetting agent and a hydantoin. The silver or silver alloy layers deposited from such an electrolyte composition by means of the method according to the invention are dull and ductile.
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