NON-CYANIDE BASED Au-Sn ALLOY PLATING SOLUTION

摘要

The present invention provides a non-cyanide-based Au-Sn alloy plating solution. The non-cyanide-based Au-Sn alloy plating solution can be treated with the Au-Sn alloy plating, by a plating solution composition, which is neutral and which does not include cyanide. The non-cyanide-based Au-Sn alloy plating solution of the present invention comprises: soluble gold salts of non-cyanide; a Sn compound including tetravalent Sn; and a thiocarboxylic acid-based compound. The non-cyanide-based Au-Sn alloy plating solution of the present invention additionally comprises sugar alcohols and dithioalkyl compounds.;COPYRIGHT KIPO 2017