IMPROVED FLUX METHOD FOR TIN AND TIN ALLOY

PROBLEM TO BE SOLVED: To provide an improved flux method which inhibits formation of tin oxide and hydroxide, acid etching and wood grain formation, in a reflow operation following electroplating of tin.SOLUTION: A flux composition which includes one or more organic compounds including one or more s...

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Bibliographische Detailangaben
1. Verfasser:	LEVEY PETER R
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:	PROBLEM TO BE SOLVED: To provide an improved flux method which inhibits formation of tin oxide and hydroxide, acid etching and wood grain formation, in a reflow operation following electroplating of tin.SOLUTION: A flux composition which includes one or more organic compounds including one or more sulfonic acid groups, salts or anhydrides thereof in amounts of 0.1-20 g/L and one or more inorganic acids in amounts of 0.1-10 g/L is applied to tin or tin alloy deposits. The flux composition is then homogenized on the tin or tin alloy to inhibit tin or tin alloy oxidation and improve brightness of the tin or tin alloy.