Cyanide-free electrolyte composition and method for the deposition of silver or silver alloy layers on substrates

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 silver or silver alloy layers with a cyanide-free electrolyte composition. The electrolyte composition according to the invention comprises...

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Bibliographische Detailangaben
Hauptverfasser:	Schäfer Stefan, Richardson Thomas B
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	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 silver or silver alloy layers with a 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 the inventive electrolyte composition by the method according to the invention are dull and ductile.