Patent ID: 7642179
Filing Date: 2010-01-05
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor substrate, the method comprising: a growing step of growing a second single crystalline semiconductor on a first single crystalline semiconductor; a blocking layer forming step of forming a porous layer as a blocking layer in a surface of the second single crystalline semiconductor; a relaxing step of generating crystal defects at a portion deeper than the blocking layer, after the blocking layer is formed, to relax a stress acting on the second single crystalline semiconductor; and a second growing step of growing a third single crystalline semiconductor on the second single crystalline semiconductor, the second growing step including sealing a surface of the porous layer, after the relaxing step, by epitaxially growing the third single crystalline semiconductor on the second single crystalline semiconductor, wherein the blocking layer prevents the crystal defects at the portion deeper than the blocking layer from propagating to a surface of the second single crystalline semiconductor, wherein the relaxing step includes a step of repeating increasing and decreasing a temperature a plurality of times.