Patent ID: 9082621
Filing Date: 2015-07-14
Classification: C30B,H01L

Abstract:
1. A method for manufacturing a silicon carbide single crystal, comprising the steps of: preparing a seed substrate having a supporting portion and first and second material substrates made of silicon carbide having a single-crystal structure, said first material substrate having a first back surface connected to said supporting portion, a first front surface opposite to said first back surface, and a first side surface connecting said first back surface and said first front surface, said second material substrate having a second back surface connected to said supporting portion, a second front surface opposite to said second back surface, and a second side surface connecting said second back surface and said second front surface, said first and second material substrates being arranged such that said first and second side surfaces face each other with a gap interposed therebetween, said gap having an opening between said first and second front surfaces; forming a closing portion for closing said gap over said opening; providing a connecting portion for closing said opening to said seed substrate by depositing a sublimate of silicon carbide from said first and second side surfaces onto said closing portion; removing said closing portion after the step of providing said connecting portion; epitaxially growing a silicon carbide single crystal that spans over said opening closed by said connecting portion, on said first and second front surfaces, after the step of removing said closing portion; and removing said seed substrate.