Patent ID: 8445358
Filing Date: 2013-05-21
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor substrate, comprising: forming an insulating layer on a single crystalline semiconductor substrate; irradiating the single crystalline semiconductor substrate with a hydrogen ion through the insulating layer at a first irradiation angle with respect to one surface of the single crystalline semiconductor substrate; irradiating the single crystalline semiconductor substrate with the hydrogen ion through the insulating layer at a second irradiation angle from the one surface of the single crystalline semiconductor substrate with respect to an embrittled region at a predetermined depth from the one surface of the single crystalline semiconductor substrate; attaching a supporting substrate and the single crystalline semiconductor substrate with the insulating layer interposed therebetween; and separating the single crystalline semiconductor substrate at the embrittled region to form a single crystalline semiconductor layer over the supporting substrate, wherein the first irradiation angle is 25° or more and 85° or less with respect to the one surface, and the second irradiation angle is 95° or more and 155° or less with respect to the one surface.