Patent ID: 8461652

Claim:
A semiconductor device comprising: a semiconductor substrate; an n-channel MOS transistor formed in a first region on a surface of said semiconductor substrate; a p-channel MOS transistor formed in a second region on said surface of said semiconductor substrate; and a contracting film formed in a third region on said surface of said semiconductor substrate, and not formed in said first region, said second region and a fourth region, wherein said first region is in contact with said third region in a first direction, said second region is in contact with said third region in a second direction perpendicular to said first direction, said fourth region is in contact with said first region in said second direction and is in contact with said second region in said first direction, a channel width direction of said n-channel MOS transistor is parallel to said second direction, a channel width direction of said p-channel MOS transistor is parallel to said second direction, and said first direction and said second direction are perpendicular to a normal line to said surface of said semiconductor substrate.