Patent ID: 8173496

Claim:
A method for manufacturing a semiconductor device, comprising: irradiating ions to a single crystal semiconductor substrate in which a first impurity semiconductor layer is formed by adding an impurity of a first element imparting one conductivity type to the single crystal semiconductor substrate wherein a damaged region is formed in the single crystal semiconductor substrate by the irradiation of the ions; forming an insulating layer over a surface of the single crystal semiconductor substrate; closely attaching the insulating layer and a supporting substrate to each other to bond the single crystal semiconductor substrate and the supporting substrate together; separating the single crystal semiconductor substrate at the damaged region to provide a stack including at least the insulating layer and the first impurity semiconductor layer over the supporting substrate; forming a second semiconductor layer to which an impurity of the first element imparting the one conductivity type is added over the first impurity semiconductor layer; improving crystallinity of the second semiconductor layer by a solid-phase growth method to form a second impurity semiconductor layer; adding an impurity of the first element imparting the one conductivity type to the second impurity semiconductor layer to form a source region and a drain region; adding an impurity of a second element imparting a conductivity type different from the one conductivity type to the second impurity semiconductor layer to form a channel region; and forming a gate electrode layer over the channel region with a gate insulating layer interposed therebetween.