Patent ID: 9691608
Date: 2017-06-27
CPC Classifications: C30B,H01L

Claim:
1. A method for manufacturing a silicon carbide substrate comprising steps of: preparing a silicon carbide single crystal substrate having a first main surface, a second main surface, and a first side end portion, said second main surface being opposite to said first main surface, said first side end portion connecting said first main surface and said second main surface to each other, said first main surface having a width with a maximum value of more than 100 mm; forming a silicon carbide epitaxial layer in contact with said first side end portion, said first main surface, and a boundary between said first main surface and said first side end portion; and removing said silicon carbide epitaxial layer formed in contact with said first side end portion and said boundary, and in the step of forming said silicon carbide epitaxial layer, said silicon carbide epitaxial layer is formed to have a stepped portion on said boundary, and in the step of removing said silicon carbide epitaxial layer, said stepped portion is removed.