Patent ID: 8241997

Claim:
A method of manufacturing a semiconductor device, said method comprising the steps of: forming a silicon oxide film on a first single crystal semiconductor substrate, the first single crystal semiconductor substrate comprising silicon; adding hydrogen to the first single crystal semiconductor substrate through the silicon oxide film to form a hydrogen added layer in the first single crystal semiconductor substrate; bonding the first single crystal semiconductor substrate to a second silicon substrate with the silicon oxide film disposed between the first single crystal semiconductor substrate and the second silicon substrate; separating the first single crystal semiconductor substrate at the hydrogen added layer by a heat treatment so that a single crystal semiconductor film is formed over the second silicon substrate; forming a semiconductor island by patterning the single crystal semiconductor film; oxidizing a surface of the semiconductor island in an oxidizing atmosphere to form an insulating layer comprising silicon oxide on the semiconductor island; forming a gate electrode over the semiconductor island with the insulating layer interposed therebetween; forming side walls adjacent to side surfaces of the gate electrode wherein the semiconductor island extends beyond outer side edges of the side walls; forming a metal film on at least portions of the semiconductor island; heating the metal film to form first metal silicide layers in the portions of the semiconductor island; and forming an insulating film comprising silicon nitride at least over the gate electrode and the semiconductor island, the insulating film being in direct contact with the gate electrode.