Patent ID: 6884693

Claim:
A method of manufacturing an SOI wafer, the method comprising: a) forming an isolation insulating film on a front face of a first semiconductor wafer to define an active region and forming a bonding insulating film on a front face of a second semiconductor wafer; b) forming a pad insulating film on the front face of the first semiconductor wafer; c) after forming the pad insulating film, performing an ion implantation process so as to form a P-well and an N-well in the active region; d) pre-bonding the respective front faces of the first semiconductor wafer including the active region having the P-well and the N-well, and the pad insulating film, and the second semiconductor wafer; e) heating the bonded first and second semiconductor wafers at a predetermined temperature to completely bond the first and second semiconductor wafers with each other; and f) polishing a back face of the first semiconductor wafer to a bottom level of the isolation insulating film.