Patent ID: 8872242

Claim:
A silicon carbide semiconductor device, comprising: a first electrode; a silicon carbide substrate having a first surface provided with said first electrode and a second surface opposite to said first surface, and having a first conductivity type, said silicon carbide substrate having a plurality of first trenches arranged to be spaced from one another in said second surface; a gate layer covering an inner surface of each of said plurality of first trenches and having a second conductivity type different from said first conductivity type; a filling portion filling each of said plurality of first trenches covered with said gate layer; a second electrode separated from said gate layer and provided on said second surface of said silicon carbide substrate; and a gate electrode electrically insulated from said silicon carbide substrate and electrically connected to said gate layer, wherein said filling portion is made of one of a semiconductor and a conductor, and separated from said silicon carbide substrate by said gate layer, and wherein said gate electrode is in contact with said filling portion.