Patent ID: 8101867

Claim:
An electroless Ni—P plating method comprising the steps of: (a) providing a substrate including an insulating substrate and a copper alloy layer that has been formed on at least one of the surfaces of the insulating substrate, the copper alloy layer being made of either copper or an alloy including copper and having a predetermined pattern including a plurality of island portions that are isolated from each other; (b) providing a plating solution to carry out electroless Ni—P plating; (c) providing a solid piece including Ni, Ni—P, Co or Co—Ni on at least one surface thereof; and (d) bringing the solid piece into contact with the surface of at least two of the island portions that are both in contact with the plating solution, thereby selectively forming an electroless Ni—P plated coating on the surface of the at least two island portions.