Patent ID: 8686438
Filing Date: 2014-04-01
Classification: H01L

Abstract:
1. A method for manufacturing a silicon carbide semiconductor device having an element region provided with a semiconductor element and a termination region surrounding said element region when viewed in a plan view, comprising the steps of: preparing a silicon carbide substrate that is made of silicon carbide having a hexagonal single-crystal structure and that has a first side and a second side opposite to each other in a thickness direction; thermally etching said first side of said silicon carbide substrate so as to form a side wall and a bottom surface in said silicon carbide substrate at said termination region, said side wall surrounding said element region and having a plane orientation of one of {0-33-8} and {0-11-4}, said bottom surface surrounding a region including said element region and said side wall and having a plane orientation of {000-1}; forming an insulating film on said side wall and said bottom surface; forming a first electrode on said first side of said silicon carbide substrate at said element region; and forming a second electrode on said second side of said silicon carbide substrate.