Semiconductor device and method of manufacturing semiconductor device

A method of manufacturing a semiconductor device comprising:

• forming a plurality of fins made of a semiconductor material on an insulating layer,
• forming a gate insulating film on side surfaces of the plurality of fins;
• forming a gate electrode on the gate insulating film;
• and
• forming a stress film in such a manner that a tensile stress is applied 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 a compressive stress is applied 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 the first fin, on side surfaces of the second fin and on side surfaces of the gate electrode, wherein
• the formation of the stress film comprises:
• forming the stress film to fill a spacing between the first fins which are adjacent to each other;
• removing the stress film in a region of the second fin, and
• formed the stress film on side surfaces of the second fin in a film thickness of less than ½ of a spacing between the second fins which are adjacent to each other.