Patent ID: 7989231

Claim:
A method of manufacturing a silicon carbide semiconductor device comprising: forming a trench in a surface of a semiconductor substrate made of silicon carbide; forming a thickness measurement section in the surface of the semiconductor substrate, the thickness measurement section including a plurality of grooves and a protruding portion, the protruding portion provided between the plurality of grooves so as to extend in one direction and have a predetermined width; growing an epitaxial layer made of silicon carbide on the surface of the semiconductor substrate, a bottom surface and a sidewall of the trench, and a bottom surface and a sidewall of the plurality of grooves, the growing the epitaxial layer including measuring a thickness of the epitaxial layer formed on the surface of the semiconductor substrate by calculating a difference in height between a surface of the epitaxial layer formed on a portion of the surface of the semiconductor substrate different from the thickness measurement section and a top surface of the protruding portion; and removing the epitaxial layer formed on the surface of the semiconductor substrate based on the thickness so that the surface of the semiconductor substrate is exposed and the epitaxial layer remains in the trench, wherein the predetermined width is less than a surface migration amount of atoms during growth of the epitaxial layer.