ALKALINE CYANIDE BATH FOR ELECTRODEPOSITION OF SMOOTH OR LUSTROUS AND FLATTED COPPER-TIN ALLOY FILM

ALKALINE CYANIDE BATH FOR ELECTRODEPOSITION OF SMOOTH OR LUSTROUS AND FLATTED COPPER-TIN ALLOY FILM

To produce bright to glossy, planarised copper-tin alloy coatings, electroplating baths are used which contain from 1 to 60 g/l of copper as copper cyanide, from 1 to 50 g/l of tin as alkali metal stannate, from 0 to 10 g/l of zinc as zinc cyanide, from 1 to 100 g/l of free alkali metal cyanide, fro...

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Bibliographische Detailangaben
Hauptverfasser: KURAUSU RAISUMIYURAA, HATSUSO KAIZAA, GERUTO HOFUATSUKAA, GIYUNTAA BUIRUTO
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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Zusammenfassung:To produce bright to glossy, planarised copper-tin alloy coatings, electroplating baths are used which contain from 1 to 60 g/l of copper as copper cyanide, from 1 to 50 g/l of tin as alkali metal stannate, from 0 to 10 g/l of zinc as zinc cyanide, from 1 to 100 g/l of free alkali metal cyanide, from 1 to 50 g/l of free alkali metal hydroxide and, as a complexing agent, from 1 to 200 g/l of oligosaccharides and/or polysaccharides as well as, additionally, from 0.01 to 4 g/l of alkene sulphonate, alkine sulphonate, pyridine compounds or sulphur-containing propane sulphonates as a brightener.