Patent ID: 7902609

Claim:
A semiconductor device comprising: a semiconductor substrate including a first transistor area having a first gate electrode and first source/drain areas, a second transistor area having a second gate electrode and second source/drain areas and an interface area provided at an interface between the first transistor area and the second transistor area and having a third gate electrode; a first stress film on the first gate electrode and the first source/drain areas of the first transistor area and on at least a portion of a top of the third gate electrode of the interface area; and a second stress film on the second gate electrode and the second source/drain areas of the second transistor area and on at least a portion of the third gate electrode of the interface area, and overlapping at least a portion of the first stress film on top of the third gate electrode, wherein a portion of the second stress film overlapping at least the portion of the first stress film is thinner than the second stress film in the second transistor area.