ELECTROLYTE FOR ELECTROPLATING TIN AND PROCESS FOR HIGH SPEED ELECTROPLATING USING THE SAME

摘要

PURPOSE: To obtain an electrolyte solution for tin electroplating having an improved resistance against oxidation of tin by preparing the electrolyte solution with water, a soluble stannous (tin II) compound, a soluble alkyl sulfonic acid, a wetting agent and a position isomer of a dihydroxybenzene. ;CONSTITUTION: The electrolyte solution for tin electroplating is prepared with water, a specific amount of a soluble tin (II) compound, a soluble alkylsulfonic acid (methane sulfonic acid) in an amount sufficient to provide a solution bath with pH substantially ≤3, a wetting agent and a position isomer of dihydroxybenzene (resorcinol) in a sufficient amount for preventing or suppressing the oxidation of tin (II) into tin (IV), thereby the electrolyte with an improved resistance against oxidation of tin is obtained so that a high speed tin electroplating on the base material is possible.;COPYRIGHT: (C)1995,JPO