Patent ID: 9506163
Filing Date: 2016-11-29
CPC Classification: C25D

Claim Text:
1. A method of electroplating with Sn-alloy comprising: dividing an inside of a plating tank into a cathode cell and an anode cell by an anion-exchange membrane; supplying plating solution including Sn ions to the cathode cell; supplying acid solution to the anode cell; electroplating by energizing an object to be plated in the cathode cell and an anode made of Sn in the anode cell; and monitoring total acid concentration in the cathode cell and the anode cell: terminating the electroplating when the total acid concentration is increased to a prescribed value, generating a replenishing solution using the acid solution in the anode cell including Sn ions supplied from the anode made of Sn; and replacing the plating solution in the cathode cell by the replenishing solution; and supplying new acid solution to the anode cell.