Patent ID: 8497191

Claim:
A method for fabricating a semiconductor device, the method comprising: forming a gate electrode over a first semiconductor layer; forming a first insulating film including a first halogen element over the gate electrode and the first semiconductor layer; forming over the first insulating film a second insulating film including a second halogen element in which a content of the second halogen element is higher than a content of the first halogen element in the first insulating film; removing a part of the first insulating film and a part of the second insulating film to expose the first semiconductor layer while remaining another part of the first insulating film and another part of the second insulating film over a side wall of the gate electrode; after removing the part of the first insulating film and the part of the second insulating film, forming a recess region in the first semiconductor layer; and forming a second semiconductor layer epitaxially in the recess region of the first semiconductor layer.