Patent ID: 9620374
Date: 2017-04-11
CPC Classifications: B24B,C30B,H01L

Claim:
1. A surface machining method for a single crystal SiC substrate, comprising: a step of mounting a grinding plate which includes a first pad and a second pad harder than said first pad sequentially attached onto a base metal having a mounting surface, a step of generating an oxidation product by using the grinding plate, and a step of grinding a surface of the single crystal SiC substrate while removing the oxidation product, wherein abrasive grains made of at least one metallic oxide that is softer than single crystal SiC and has a bandgap are fixed to a grinding surface of the second pad, and wherein a rotation direction of a table for a substance to be machined in the inverse direction of the rotation direction of the grinding plate, the second pad is segmented, and the rotation speed of the table for a substance to be machined is in a range of 30 rpm to 300 rpm.