Patent ID: 8338889

Claim:
A semiconductor device comprising: an insulating layer; a plurality of fins made of a semiconductor material on the insulating layer; a gate insulating film provided on side surfaces of the plurality of fins; a gate electrode on the gate insulating film; and a stress film applying a tensile stress to a side surface of a first fin which is used in an NMOSFET among the plurality of fins in a current flow direction of the NMOSFET and applying a compressive stress to a side surface of a second fin which is used in a PMOSFET among the plurality of fins in a current flow direction of the PMOSFET, the stress film being formed on side surfaces of a source and a drain regions of the fins, wherein the stress film is filled in a spacing between the first fins which are adjacent to each other in a plane parallel to a surface of the insulating layer, the stress film is not filled in a spacing between the second fins which are adjacent to each other in a plane parallel to a surface of the insulating layer of the second fins and is formed to provide a gap.