Patent ID: 8779524

Claim:
A semiconductor device comprising: a first MIS transistor of a first conductivity type; and a second MIS transistor of a second conductivity type, wherein the first MIS transistor includes: a first gate insulating film including a first high dielectric constant film formed on a first active region surrounded by a separation region of a semiconductor substrate, and a first gate electrode formed on the first gate insulating film, the second MIS transistor includes: a second gate insulating film including a second high dielectric constant film formed on a second active region surrounded by the separation region of the semiconductor substrate, and a second gate electrode formed on the second gate insulating film, the first and second gate insulating films are separated from each other on a first separation region of the separation region located between the first and second active regions, the first and second active regions are adjacent to each other in a gate width direction with the first separation region being interposed between the first and second active regions, and the following relationship is established: d1<0.5s where s is a distance between first ends of the first and second active regions facing each other with the first separation region being interposed between the first ends of the first and second active regions, and d 1 is a protrusion amount from the first end of the first active region to a first end of the first gate insulating film located on the first separation region, the first and second gate electrodes are separated from each other on the first separation region, and the semiconductor device further includes a contact plug formed on the first separation region, covering end portions of the first and second gate electrodes.