Patent ID: 8268701

Claim:
A manufacturing method of a semiconductor device, comprising the steps of: forming a first defect layer in a first bond substrate by a first doping; partially etching the first bond substrate to form a plurality of first projections including the first defect layer; performing heat treatment on the first bond substrate to separate the first bond substrate at the first defect layer to form a plurality of first semiconductor films; forming a second defect layer in a second bond substrate by a second doping; partially etching the second bond substrate to form a plurality of second projections including the second defect layer; performing heat treatment on the second bond substrate to separate the second bond substrate at the second defect layer to form a plurality of second semiconductor films having a crystal orientation different from that of the plurality of first semiconductor films; bonding the plurality of first semiconductor films to a base substrate so that a surface of each of the plurality of first semiconductor films exposed by separating the bond substrate faces the base substrate; bonding the plurality of second semiconductor films to the base substrate so that the plurality of first semiconductor films and the plurality of second semiconductor films are spaced apart from each other; and etching the plurality of first semiconductor films and the plurality of second semiconductor films to form a plurality of third semiconductor films and a plurality of fourth semiconductor films.