Patent ID: 8440510
Filing Date: 2013-05-14
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming a gate electrode; forming a first insulating film over the gate electrode; performing halogen doping treatment on the first insulating film so that the first insulating film is supplied with a halogen atom; forming an oxide semiconductor film over the first insulating film so that the oxide semiconductor film overlaps with the gate electrode; performing first heat treatment on the oxide semiconductor film so that a hydrogen atom in the oxide semiconductor film is removed; performing oxygen doping treatment on the oxide semiconductor film from which the hydrogen atom is removed so that the oxide semiconductor film is supplied with an oxygen atom; performing second heat treatment on the oxide semiconductor film to which the oxygen atom is supplied; forming a source electrode and a drain electrode on and in contact with the oxide semiconductor film; and forming a second insulating film on and in contact with the oxide semiconductor film.