Patent ID: 8557676

Claim:
A method of manufacturing a semiconductor device comprising the steps of: forming a first insulating film on a first substrate, wherein the first substrate comprises single-crystal semiconductor; introducing ions comprising H 3 + ions into the first substrate to form an embrittled layer therein; forming a second insulating film and a third insulating film in order over a second substrate; irradiating both of a surface of the first insulating film and a surface of the third insulating film with a beam in a vacuum, whereby both of the surface of the first insulating film and the surface of the third insulating film are etched and activated; bonding the first insulating film on the first substrate and the third insulating film over the second substrate together after the step of irradiating; and forming a single-crystal semiconductor film over the second substrate by separating the single-crystal semiconductor film from the first substrate at an interface of the embrittled layer in the first substrate, wherein a material of the first insulating film is the same as that of the third insulating film.