Patent ID: 7538013
Filing Date: 2009-05-26
Classification: H01L

Abstract:
1. A field effect transistor manufacturing method comprising: implanting hydrogen ions into a first semiconductor substrate to form an intermediate layer, which has hydrogen, into the first semiconductor substrate; subjecting the first semiconductor substrate to a heat treatment; forming a first insulating film on the first semiconductor substrate, the first insulating film including a metal oxide having a crystallinity and different in a lattice distance of a crystal on an interface from the first semiconductor substrate; forming a first semiconductor layer on the first insulating film; bonding a second semiconductor substrate to a surface of the first semiconductor layer; peeling off the second semiconductor substrate with the intermediate layer set as a boundary to divide the first semiconductor substrate in two and to expose one of the two of the first semiconductor substrate on the first insulating film; flattening an exposed surface of one of the two of the first semiconductor substrate; forming a second insulating film on the exposed surface; patterning the second insulating film and the exposed one of the first semiconductor substrate to form a channel region; forming a gate insulating film on side surfaces of the channel region; forming a gate electrode to cover at least the gate insulating film on the side surfaces of the channel region; and forming a source region and a drain region above the first insulating film on side surfaces of the channel region different from the side surfaces of the channel region on which the gate insulating film is formed.