Patent ID: 9418840
Filing Date: 2016-08-16
CPC Classification: C23C,C30B,H01L

Claim Text:
1. A silicon carbide semiconductor device manufacturing method, whereby a silicon carbide epitaxial film is grown on a silicon carbide semiconductor substrate by a chemical vapor deposition method using a mixed gas atmosphere made of silicon-containing gas, carbon-containing gas, and chlorine-containing gas, comprising: a first growth step which grows the silicon carbide epitaxial film, while increasing a first growth rate at a constant rate, until a thickness of the silicon carbide epitaxial film reaches a first predetermined thickness; and a second growth step which grows the silicon carbide epitaxial film at a second growth rate equal to or higher than the first growth rate, which is at an end of the first growth step, after the first growth step until the thickness of the silicon carbide epitaxial film reaches a second predetermined thickness larger than the first predetermined thickness.