Patent ID: 9716006
Date: 2017-07-25
CPC Classifications: C30B,H01L

Claim:
1. A method for manufacturing a semiconductor device, comprising the steps of: (a) preparing a SiC epitaxial substrate in which on a SiC support substrate, a SiC epitaxial growth layer having an impurity concentration equal to or less than 1/10,000 of that of said SiC support substrate and having a thickness of 50 μm or more is disposed; (b) forming an impurity region which forms a semiconductor element by selectively implanting impurity ions to a first main surface of said SiC epitaxial substrate; (c) forming an ion implantation region which controls warpage of said SiC epitaxial substrate by implanting predetermined ions to a second main surface of said SiC epitaxial substrate; and (d) heating said SiC epitaxial substrate after said step (b) and said step (c).