Invention Grant
- Patent Title: Monocrystalline silicon carbide ingot, monocrystalline silicon carbide wafer and method of manufacturing the same
- Patent Title (中): 单晶碳化硅锭,单晶碳化硅晶圆及其制造方法相同
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Application No.: US11663887Application Date: 2005-10-05
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Publication No.: US08795624B2Publication Date: 2014-08-05
- Inventor: Masashi Nakabayashi , Tatsuo Fujimoto , Mitsuru Sawamura , Noboru Ohtani
- Applicant: Masashi Nakabayashi , Tatsuo Fujimoto , Mitsuru Sawamura , Noboru Ohtani
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel & Sumitomo Metal Corporation
- Current Assignee: Nippon Steel & Sumitomo Metal Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2004-299088 20041013
- International Application: PCT/JP2005/018732 WO 20051005
- International Announcement: WO2006/041067 WO 20060420
- Main IPC: C01B31/36
- IPC: C01B31/36 ; H01L21/00 ; B01J3/04 ; H01B1/04 ; H01B1/00 ; H01L29/16 ; H01L21/02 ; C30B13/00 ; C30B21/04 ; C30B28/08

Abstract:
Provided is a monocrystalline silicon carbide ingot containing a dopant element, wherein a maximum concentration of the dopant element is less than 5×1017 atoms/cm3 and the maximum concentration is 50 times or less than that of a minimum concentration of the dopant element. Also provided is a monocrystalline silicon carbide wafer made by cutting and polishing the monocrystalline silicon carbide ingot, wherein a electric resistivity at room temperature of the wafer is 5×103 Ωcm or more. Further provided is a method for manufacturing the monocrystalline silicon carbide including growing the monocrystalline silicon carbide on a seed crystal from a sublimation material by a sublimation method. The sublimation material includes a solid material containing a dopant element, and the specific surface of the solid material containing the dopant element is 0.5 m2/g or less.
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