Patent ID: 8546814

Claim:
A semiconductor device comprising: a semiconductor layer of a first conductivity type; a plurality of body regions of a second conductivity type formed on a region extending from a surface of the semiconductor layer to a halfway portion in a thickness direction at intervals in a direction orthogonal to the thickness direction; source regions of the first conductivity type with a respective source region being formed on a surface layer portion of each body region at an interval from a peripheral edge of the body region; a trench formed in the semiconductor layer by partially digging down the semiconductor layer, the plurality of body regions and the source regions from the surface of the semiconductor layer to a halfway portion of the source regions in the thickness direction, the trench extending over two of the source regions that are adjacent to each other: a gate insulating film formed on an inner surface of the trench and a surface of the source regions; and a gate electrode formed on the gate insulating film, the gate electrode having a surface-opposed portion opposed to the surface of the semiconductor layer from above thereof and an embedded portion embedded in the trench up to the surface of the semiconductor layer for the trench to be filled with the gate electrode.