Patent ID: 9679767
Date: 2017-06-13
CPC Classifications: C23C,C30B,H01L

Claim:
1. A method of manufacturing a SiC epitaxial wafer including a SiC epitaxial layer on a SiC substrate using a SiC-CVD furnace which is installed in a glove box, comprising: a SiC substrate placement step of placing the SiC substrate in the SiC-CVD furnace while circulating gas in the glove box, wherein the SiC-CVD furnace includes a susceptor that has a wafer mounting portion on which a wafer is placed, a ceiling that faces an upper surface of the susceptor such that a reaction space is formed between the ceiling and the susceptor, and a shielding plate that is provided so close to a lower surface of the ceiling that a deposit is prevented from being attached to the lower surface of the ceiling, a surface of the shielding plate which faces the susceptor is coated with one of a silicon carbide film and a pyrolytic carbon film, or the shielding plate is made of silicon carbide, and the method further includes a step of measuring the surface density of triangular defects including a piece of a member which is placed in the SiC-CVD furnace as a starting point in a SiC epitaxial film of a previously manufactured SiC epitaxial wafer and manufacturing the next SiC epitaxial wafer.