Invention Grant
- Patent Title: Chamfered silicon carbide substrate and method of chamfering
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Application No.: US16409698Application Date: 2019-05-10
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Publication No.: US11041254B2Publication Date: 2021-06-22
- Inventor: Michael Vogel , Bernhard Ecker , Ralf Müller , Arnd-Dietrich Weber , Matthias Stockmeier
- Applicant: SiCrystal GmbH
- Applicant Address: DE Nuremberg
- Assignee: SiCrystal GmbH
- Current Assignee: SiCrystal GmbH
- Current Assignee Address: DE Nuremberg
- Agency: Michael Best & Friedrich LLP
- Priority: EP18171736 20180511
- Main IPC: B24B9/02
- IPC: B24B9/02 ; C30B29/36 ; C30B29/60 ; C30B33/00 ; H01L21/02 ; B24B9/06 ; B24B37/04

Abstract:
The present invention relates to a chamfered silicon carbide substrate which is essentially monocrystalline, and to a corresponding method of chamfering a silicon carbide substrate. The silicon carbide substrate (100) comprises a main surface (102) and a circumferential end face surface (114) which is essentially perpendicular to the main surface (102), and a chamfered peripheral region (110), wherein a first bevel surface (106) of the chamfered peripheral region (110) includes a first bevel angle (a1) with said main surface (102), and wherein a second bevel surface (108) of the chamfered peripheral region (110) includes a second bevel angle (a2) with said end face surface (114), wherein, in more than 75% of the peripheral region, said first bevel angle (a1) has a value in a range between 20° and 50°, and said second bevel angle (a2) has a value in a range between 45° and 75°.
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