WHISKER-FREE TIN AND TIN ALLOY PLATING SOLUTION, PRINTING FILM AND PLATING OBJECT

摘要

PROBLEM TO BE SOLVED: To prepare a tin plating solution or tin alloy plating solution which obviates the generation of whiskers even if an object to be plated is not subjected to heat treatment.;SOLUTION: The tin plating solution or tin alloy plating solution contains, as additives, at least one kind selected from the group consisting of a bisphenol A ethylene oxide adduct, bisphenol A propylene oxide adduct, bisphenol F ethylene oxide adduct and bisphenol F propylene oxide adduct. The tin or tin alloy plating film which obviates the generation of the whiskers for ≥1 year is obtained by these additives even if the plating solution is not subjected to the heat treatment.;COPYRIGHT: (C)2002,JPO