Invention Grant
- Patent Title: Silicon carbide semiconductor device and method for manufacturing the same
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Application No.: US16362077Application Date: 2019-03-22
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Publication No.: US11069779B2Publication Date: 2021-07-20
- Inventor: Kenichi Iguchi , Haruo Nakazawa , Yusuke Wada
- Applicant: FUJI ELECTRIC CO., LTD.
- Applicant Address: JP Kawasaki
- Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee Address: JP Kawasaki
- Priority: JP2018-102560 20180529
- Main IPC: H01L29/16
- IPC: H01L29/16 ; H01L29/45 ; H01L29/36 ; H01L29/04 ; H01L21/285 ; H01L21/02 ; H01L21/265 ; H01L21/268

Abstract:
A silicon carbide semiconductor device includes a first semiconductor layer of silicon carbide, a device structure provided on top of the first semiconductor layer, a second semiconductor layer of silicon carbide having a higher impurity concentration than the first semiconductor layer, provided under the first semiconductor layer, the second semiconductor layer implementing an ohmic-contact, and a metallic electrode film provided under the second semiconductor layer. A thickness of a carbon-containing region in which carbon-atoms are precipitated between the second semiconductor layer and the metallic electrode film is 10 nm or less.
Information query
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