Patent ID: 7919403

Claim:
A method of manufacturing a silicon carbide semiconductor device, comprising: a step of forming in a surface of a silicon carbide wafer of first conductivity type a first region of second conductivity type having a predetermined space thereinside, by ion-implanting a first impurity that is non-diffusible during an activation annealing treatment and can form a second conductivity type region in the silicon carbide wafer and a second impurity that is diffusible during the activation annealing treatment and can form a second conductivity type region in the silicon carbide wafer; a step of forming a JTE region in the surface of the silicon carbide wafer from the first region by diffusing the second impurity ion-implanted in the first region toward its neighboring zones by the activation annealing treatment; a step of forming a first electrode on a surface area of the silicon carbide wafer at the space inside the first region and at an inner part of the first region; and a step of forming a second electrode on the opposite surface of the silicon carbide wafer.