Patent ID: 8049263

Claim:
A semiconductor device including a capacitor, the capacitor comprising a first electrode, a dielectric film and a second electrode, and comprising: a first insulating film over a semiconductor substrate; a first wiring trench formed in the first insulating film; a first wiring layer comprising a first conductive film buried in the first wiring trenches; a second insulating film over the first lower wiring layer; an electrode trench and a first via hole formed in the second insulating film, the first via hole being connected to the first lower wiring layer, and formed below the electrode trench, and that is smaller in area than the electrode trench in plan view; the first electrode comprising a second conductive film buried in the electrode trench and in the first via hole; the dielectric film formed over the first electrode; the second electrode formed over the dielectric film; a first upper wiring layer formed over the second insulating film and over the second electrode, the first upper wiring layer being connected to the second electrode and comprising a third conductive film, wherein a planar area of the dielectric film and that of the second electrode are equal to each other and are each larger than a planar area of the first electrode, wherein an entire portion of the first electrode is disposed inside edges of the second electrode and the dielectric film in plan view, wherein the first conductive film comprises a metallic film containing copper as a main component, the second conductive film comprises a metallic film containing tungsten as a main component, and the third conductive film comprises a metallic film containing an aluminum alloy as a main component, and wherein the first upper wiring layer covers all side portions of both the dielectric film and the second electrode.