Patent ID: 7902034

Claim:
A method of manufacturing an SOI substrate comprising the steps of: forming a first insulating film on a first substrate, wherein the first substrate comprises single-crystal semiconductor; introducing hydrogen into the first substrate to form an embrittled layer therein; forming a second insulating film and a third insulating film in order on a second substrate; activating at least one of a surface of the first substrate and a surface of the second substrate; bonding the first insulating film on the first substrate and the third insulating film over the second substrate together after the step of activating; and separating a single-crystal semiconductor film from the first substrate at an interface of the embrittled layer in the first substrate to form the single-crystal semiconductor film over the second substrate with the second insulating film and bonded third and first insulating films interposed therebetween, wherein the first insulating film and the third insulating film comprise silicon oxide that contains nitrogen, and the second insulating film comprises silicon nitride that contains oxygen.