Invention Grant
- Patent Title: SiC epitaxial wafer, method for manufacturing SiC epitaxial wafer, SiC device, and power conversion apparatus
-
Application No.: US16474161Application Date: 2017-04-06
-
Publication No.: US10910218B2Publication Date: 2021-02-02
- Inventor: Kenichi Hamano , Akihito Ohno , Takuma Mizobe , Yasuhiro Kimura , Yoichiro Mitani
- Applicant: Mitsubishi Electric Corporation
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Studebaker & Brackett PC
- International Application: PCT/JP2017/014395 WO 20170406
- International Announcement: WO2018/185916 WO 20181011
- Main IPC: C30B25/14
- IPC: C30B25/14 ; H01L21/02 ; C30B29/36 ; H01L29/06 ; H01L29/16 ; H02M7/44 ; H01L29/78 ; H01L29/872 ; H02P27/06

Abstract:
A SiC substrate (1) has an off angle θ°. A SiC epitaxial layer (2) having a film thickness of Tm μm is provided on the SiC substrate (1). Triangular defects (3) are formed on a surface of the SiC epitaxial layer (2). A density of triangular defects (3) having a length of Tm/Tan θ×0.9 or more in a substrate off direction is denoted by A. A density of triangular (3) defects having a length smaller than Tm/Tan θ×0.9 in the substrate off direction is denoted by B. B/A≤0.5 is satisfied.
Public/Granted literature
Information query
IPC分类: