Patent ID: 7821013

Claim:
A silicon carbide semiconductor device comprising: a semiconductor substrate including first and second gate layers, a channel layer, a source layer, and a trench; a gate wiring having a first portion and a plurality of second portions; a gate pad connecting to the second gate layer electrically; and a source wiring having a third portion and a plurality of fourth portions, wherein the source layer is disposed on the second gate layer, wherein the trench penetrates both of the source layer and the second gate layer, and extends in a predetermined extending direction on a principal surface of the semiconductor substrate, wherein the first gate layer is disposed in the trench through the channel layer, and extends in parallel to the extending direction, wherein the gate and source wirings are disposed on the principal surface of the semiconductor substrate, wherein the first portion extends perpendicularly to the extending direction, wherein the second portions protrude in parallel to the extending direction from a side of the first portion to be a comb shape, and are disposed on and electrically connect to the first gate layer, wherein the third portion extends perpendicularly to the extending direction, wherein the fourth portions protrude in parallel to the extending direction from a side of the third portion to be a comb shape, and are disposed on and electrically connect to the source layer, wherein the second portions and the fourth portions are disposed alternately to face each other, and wherein the gate pad connects to the second gate layer through a contact hole disposed in the source layer.