Patent ID: 9640618
Date: 2017-05-02
CPC Classifications: G06F,H01L

Claim:
1. A silicon carbide semiconductor device, comprising: a silicon carbide layer of a first conductivity type; a silicon carbide layer of a second conductivity type formed on the silicon carbide layer of the first conductivity type; a gate trench formed to extend from a surface of the silicon carbide layer of the second conductivity type to such a depth that the gate trench reaches the silicon carbide layer of the first conductivity type; a gate electrode provided in the gate trench with an insulating film interposed between a wall of the gate trench and the gate electrode; first and second protection trenches formed to extend from the surface of the silicon carbide layer of the second conductivity type to a depth greater than the depth of the gate trench; and a first conductive member provided in the first and second protection trenches, a second conductive member is provided above the gate trench in the cell region and in the gate region, wherein the second conductive member is disposed to extend from above the gate trench in the cell region to the gate region through a region of the second conductive member directly above a part of the cell region in which the first protection trench is not provided but is not disposed directly above any part of the cell region in which the first protection trench is provided.