Patent ID: 8866155

Claim:
A silicon carbide semiconductor device, comprising: a collector layer made of silicon carbide having a first conductivity type; and a switching element provided on said collector layer, said switching element including a junction gate for controlling a channel having a second conductivity type different from said first conductivity type; wherein said switching element includes: a semiconductor layer having a first layer provided on said collector layer and having said second conductivity type, a second layer provided on said first layer and having said first conductivity type, and a third layer provided on said second layer and having said second conductivity type, said semiconductor layer being provided with a trench having a side wall penetrating said third layer and said second layer and reaching said first layer; a channel layer contacting each of said first to third layers on said side wall of said trench and having said second conductivity type; a gate layer as said junction gate, sandwiching said channel layer between itself and said second layer and having said first conductivity type; and a gate electrode provided on said gate layer.