Patent ID: 8435866
Filing Date: 2013-05-07
Classification: C30B

Abstract:
1. A method for manufacturing a silicon carbide substrate, comprising the steps of: preparing at least one single crystal substrate, each having a backside surface and made of silicon carbide, and a supporting portion having a main surface and made of silicon carbide, said preparing step including the step of forming at least one of said backside surface and said main surface by machining, and a surface layer having distortion in a crystal structure being formed on at least one of said backside surface and said main surface by said forming step, said method further comprising the steps of: removing said surface layer at least partially, and connecting said backside surface and said main surface to each other, after said removing step; wherein said connecting step is carried out by causing sublimation of silicon carbide from said main surface and recrystallization of silicon carbide on said backside surface, between said backside surface and said main surface.