Patent ID: 8786022

Claim:
A semiconductor device comprising: a first gate insulation film that includes an oxide of Hf or an oxide of Zr, formed over a semiconductor substrate; a first cap film formed over the first gate insulation film, the first cap film including an oxide of a first material; a first silicon oxide film formed over the first cap film; a first metal gate electrode formed over the first silicon oxide film; first source/drain diffused layers formed in the semiconductor substrate on both sides of the first metal gate electrode and having a first conductive type; a second gate insulation film that includes an oxide of Hf or an oxide of Zr, formed over the semiconductor substrate; a second cap film formed over the second gate insulation film, the second cap film including the oxide of the first material; a second metal gate electrode formed directly on the second cap film; and second source/drain diffused layers formed in the semiconductor substrate on both sides of the second metal gate electrode and having a second conductive type.