Patent ID: 6444547
Filing Date: 2002-09-03
Classification: C30B,H01L

Abstract:
A method for manufacturing a semiconductor device comprising:(a) growing a semiconductor layer having moderate crystal defects by providing epitaxial growth on a surface of a sub-wafer made of a semiconductor material not provided with mirror finishing without having any other intervening material positioned between the semiconductor layer and the surface of the sub-wafer, (b) introducing impurities having different conductivity types in said epitaxially grown semiconductor layer to form at least a pn junction, and (c) further providing rapid thermal annealing by rapidly heating-up and rapidly cooling-down in any step in manufacturing said semiconductor device, wherein said surface of said sub-wafer is formed to a roughness of 0.01-0.5 &mgr;m in microroughness, and said rapid thermal anneal is carried out at 700-900Â° C.