Patent ID: 9147731
Filing Date: 2015-09-29
Classification: H01L

Abstract:
1. A method for manufacturing a silicon carbide semiconductor device, comprising the steps of: preparing a silicon carbide substrate; a first heating step of heating said silicon carbide substrate in an atmosphere of oxygen; a second heating step of heating said silicon carbide substrate to a temperature of 1300° C. or more and 1500° C. or less in an atmosphere of gas containing nitrogen atoms or phosphorus atoms after said first heating step; and a third heating step of heating said silicon carbide substrate in an atmosphere of a first inert gas after said second heating step, wherein said first heating step includes forming an oxide film on a surface of said silicon carbide substrate, wherein said second heating step is performed for a predetermined time to reduce dangling bonds at an interface of said oxide film and said silicon carbide substrate, and wherein in said third heating step, said silicon carbide substrate is heated to 1300° C. or more and 1500° C. or less.