Patent ID: 6835120
Filing Date: 2004-12-28
Classification: B24B,C09G,C09K,H01L

Abstract:
A method for mechanochemical polishing, comprising:preparing a chemical solution that includes hydrogen peroxide water and abrasive grains made of chromium (III) oxide; polishing a surface of a SiC wafer by mechanochemical polishing to remove SiC from the surface of the wafer using the chemical solution and a polishing cloth with a processing pressure having a range of approximately 0.1-3.0 kgf/cm2; and increasing oxygen concentration on the surface of the SiC wafer to promote the formation of an oxide of the SiC wafer by performing the polishing in the presence of the hydrogen peroxide water, wherein the oxide of the SiC wafer is formed by catalysis of the chromium (III) oxide, and the oxygen concentration around the polishing surface of the SiC wafer is increased by supplying the hydrogen peroxide water to the polishing surface to promote the formation of the oxide of the SiC wafer.