Patent ID: 8906795

Claim:
A semiconductor device manufacturing method whereby a plating layer is formed using a plating process on one main surface side of a semiconductor substrate, the method comprising: forming a first electrode on one main surface side of the semiconductor substrate and forming a second electrode on the other main surface side of the semiconductor substrate; attaching a first film to the other main surface of the semiconductor substrate after the forming the first and second electrode in order to prevent a deposition of the plating layer on the second electrode when carrying out the plating process; attaching a second film to an outer peripheral portion of the semiconductor substrate after the attaching the first film in order to prevent a deposition of the plating layer on the outer peripheral portion of the semiconductor substrate when carrying out the plating process; and forming the plating layer in contact with the first electrode on the one main surface side of the semiconductor substrate using the plating process after the attaching the second film.