ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,699, issued on Dec. 16, was assigned to JAPAN PURE CHEMICAL Co. LTD. (Tokyo).
"Plating stack" was invented by Kenji Yoshiba (Tokyo), Yusuke Yaguchi (Tokyo) and Hiroshi Minowa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "In the method for producing a plating stack, a plating layer A mainly composed of a second metal is deposited on an object to be plated S mainly composed of a first metal by a substitution reaction, then a plating layer B mainly composed of a third metal is deposited on the plating layer A, and then a plating layer C mainly composed of the second metal, the third metal, or a fourth metal is deposited on the plating layer B b...