Patent ID: 8314012
Filing Date: 2012-11-20
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: adding an accelerated ion to a single crystal semiconductor substrate by an ion doping method to form a damaged region added with the ion and located in a portion of the single crystal semiconductor substrate deeper than a surface of the single crystal semiconductor substrate; arranging a supporting substrate and the single crystal semiconductor substrate in close contact with each other with a buffer layer interposed therebetween to bond the supporting substrate and the single crystal semiconductor substrate together; causing a crack in the damaged region by heating of the single crystal semiconductor substrate to separate a part of the single crystal semiconductor substrate from the single crystal semiconductor substrate, and to fix the part of the single crystal semiconductor substrate to the supporting substrate with the part of the single crystal semiconductor substrate as a single crystal semiconductor layer; and irradiating a laser beam through a gas ejection portion to a part of the single crystal semiconductor layer fixed to the supporting substrate with the buffer layer interposed therebetween to melt the single crystal semiconductor layer and perform re-single-crystallization; and blowing a heated nitrogen gas ejected from the gas ejection portion on the part of the single crystal semiconductor layer irradiated with the laser beam.