Patent ID: 8530353
Filing Date: 2013-09-10
Classification: C30B,H01L

Abstract:
1. A method of manufacturing a SiC substrate comprising the steps of: providing a SiC substrate that includes a first principal surface and a second principal surface, the first principal surface having a surface roughness of about 10 nm to about 1 μm and including a work-affected layer that is formed by mechanical flattening or cutting the SiC substrate such that compressive stresses are produced in the work-affected layer of the SiC substrate; and removing, by reactive ion etching the first principal surface having the surface roughness of about 10 nm to about 1 μm, at least a portion of the work-affected layer; wherein the first principal surface is not subject to mirror polishing before the removing step and is opposite to a surface on which an epitaxial layer is to be grown.