Patent ID: 9165779
Filing Date: 2015-10-20
Classification: B24B,C30B,H01L

Abstract:
1. A method for fabricating single-crystal silicon carbide wafers, comprising: (i) slicing an ingot of single crystal silicon into a plurality of wafers; (ii) chamfering circumferential edge of each of the wafers of step (i); (iii) performing saw damage removal from front and back surfaces of each of the wafers of step (ii); and (iv) simultaneous polishing of both surfaces of each wafer of step (iii); to thereby fabricate wafers having local thickness variation (LTV) of 0.1 to 1.5 μm and site front side least squares focal plane range (SFQR) of 0.01 to 0.3 μm, based on a one square cm site size.