Patent ID: 8119519

Claim:
A semiconductor device production method comprising the steps of: forming a first interconnection layer on a substrate; and forming a second interconnection layer stacked directly on the first interconnection layer without intervention of a via layer, the first interconnection layer forming step including the steps of: forming a first insulation film; simultaneously forming a first interconnection opening and a first via opening in the first insulation film, so that the first interconnection opening and the first via opening extend through the first insulation film; and depositing a first electrically conductive material in the first interconnection opening and the first via opening, the second interconnection layer forming step including the steps of; forming a second insulation film stacked directly on the first insulation film; simultaneously forming a second interconnection opening and a second via opening in the second insulation film so that the second interconnection opening and the second via opening extend through the second insulation film; and depositing a second electrically conductive material in the second interconnection opening and the second via opening.