Patent ID: 9659773
Date: 2017-05-23
CPC Classifications: H01L

Claim:
1. A method for manufacturing a silicon carbide semiconductor device, comprising the steps of: forming an impurity region in a silicon carbide layer; forming a first carbon layer on a surface of the silicon carbide layer having the impurity region formed therein by selectively removing silicon from the surface; forming a second carbon layer on the first carbon layer; and heating the silicon carbide layer having the first carbon layer and the second carbon layer formed on the silicon carbide layer, wherein, in the step of forming the second carbon layer, the second carbon layer constituted of a plurality of layers is formed, wherein a plurality of laminated carbon layers constituting the plurality of layers are formed such that the laminated carbon layer close to the surface of the silicon carbide layer has a relatively high density, and wherein, in the step of forming the first carbon layer, silicon is selectively removed from the surface of the silicon carbide layer by reaction of a halogen element and silicon.