Patent Document ID: 20100012951
Application ID: 12310992
Patent Flag: 0

Claim One:
1. A silicon carbide semiconductor device comprising: a first deposition film ( 2 ) of a first-conductivity low-concentration silicon carbide formed on the surface of a first-conductivity high-concentration silicon carbide substrate ( 1 ), a second deposition film ( 32 ) of a second-conductivity low-concentration silicon carbide formed on it, a second-conductivity high-concentration gate region ( 31 ) formed selectively in the first deposition film so as to have a partial deficiency part ( 24 ) of the first-conductivity low-concentration silicon carbide remaining therein, a first-conductivity first low-concentration inverted region ( 40 ) running through the second deposition film in the region where the partial deficiency part formed in the second deposition film is projected, second-conductivity low-concentration gate regions ( 11 , 12 ) adjacent to the first low-concentration inverted region, first-conductivity second low-concentration inverted regions ( 41 , 42 ) running through the second deposition film, first-conductivity high-concentration source regions ( 51 , 52 ) at least a part of which is formed in the second low-concentration inverted region, a gate insulation film ( 6 ) formed on the surface of the second deposition film, a gate electrode ( 7 ) formed on at least the low-concentration region via the gate insulation film, a drain electrode ( 10 ) connected to the back of the first-conductivity high-concentration silicon carbide substrate in a mode of low-resistance interconnection, and a source electrode ( 9 ) connected to the first-conductivity high-concentration source region and to a part of the second-conductivity second deposition film in a mode of low-resistance interconnection.