Invention Grant
- Patent Title: Silicon carbide member for plasma processing apparatus, and production method therefor
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Application No.: US16307534Application Date: 2017-09-13
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Publication No.: US11264214B2Publication Date: 2022-03-01
- Inventor: Tomohisa Suzuki , Michito Miyahara , Masaru Sasaki
- Applicant: HOKURIKU SEIKEI INDUSTRIAL CO., LTD. , TOHOKU UNIVERSITY
- Applicant Address: JP Ishikawa; JP Miyagi
- Assignee: HOKURIKU SEIKEI INDUSTRIAL CO., LTD.,TOHOKU UNIVERSITY
- Current Assignee: HOKURIKU SEIKEI INDUSTRIAL CO., LTD.,TOHOKU UNIVERSITY
- Current Assignee Address: JP Ishikawa; JP Miyagi
- Agency: Fleit Intellectual Property Law
- Agent Paul D. Bianco; Katharine Davis
- Priority: JPJP2016-188361 20160927
- International Application: PCT/JP2017/033102 WO 20170913
- International Announcement: WO2018/061778 WO 20180405
- Main IPC: H01J37/32
- IPC: H01J37/32 ; C23C16/32 ; H01L21/687 ; H01L21/3065

Abstract:
A low-cost, durable silicon carbide member for a plasma processing apparatus. The silicon carbide member for a plasma processing apparatus can be obtained by processing a sintered body which is produced with a method in which metal impurity is reduced to more than 20 ppm and 70 ppm or less, and an α-structure silicon carbide power having an average particle diameter of 0.3 to 3 μm and including 50 ppm or less of an Al impurity is mixed with 0.5 to 5 weight parts of a B4C sintering aid, or with a sintering aid comprising Al2O3 and Y2O3 with total amount of 3 to 15 weight parts, and then a mixture of the α-structure silicon carbide power with the sintering aid is sintered in an argon atmosphere furnace or a high-frequency induction heating furnace.
Public/Granted literature
- US20190304755A1 SILICON CARBIDE MEMBER FOR PLASMA PROCESSING APPARATUS, AND PRODUCTION METHOD THEREFOR Public/Granted day:2019-10-03
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