Patent ID: 7732839

Claim:
A semiconductor device comprising a first MIS transistor of a first conductive type formed in a first region in a semiconductor substrate, wherein the first MIS transistor includes a first gate insulating film formed on the first region, a first gate electrode portion formed on the first gate insulating film, first insulating sidewalls formed on side surfaces of the first gate electrode portion, first source/drain regions, each being formed in part of the first region located at a side of an associated one of the first insulating sidewalls, and a first stress film formed so as to cover the first gate electrode portion and the first source/drain regions, wherein the first gate electrode portion includes a first gate electrode formed on the first gate insulating film and a first silicide layer formed on the first gate electrode, wherein a height of an upper surface of the first silicide layer of the first gate electrode portion is lower than a height of an upper edge of each said first insulating sidewall, and wherein a thickness of first part of the first stress film located on the first gate electrode portion is larger than a thickness of second part of the first stress film located on the first source/drain regions.