Patent ID: 8778790

Claim:
A manufacturing method of a semiconductor device, comprising the steps of: (a) forming a first wiring including a conductive film above a substrate; (b) forming a first insulating film that exposes a first region of the first wiring over the first wiring; (c) forming a second wiring extending from the first region of the first wiring over the first insulating film, and by the steps of: (c1) forming a first copper film including copper as a principal component over the first region and the first insulating film; (c2) forming a first mask film that opens a formation region of the second wiring over the first copper film; (c3) forming a second copper film including copper as a principal component by plating-growth over the first copper film in the formation region of the second wiring; and (c4) forming a first nickel film including nickel as a principal component over the second copper film, forming the second wiring including the first copper film, the second copper film, and the first nickel film; (d) forming a gold film including gold as a principal component in a pad region over the second wiring; (e) after the step (d), forming a passivation film of nickel oxide on the surface of the first nickel film by removing the first mask film and performing passivation processing on the first nickel film; and (f) after the step (e), etching the first copper film.