Patent ID: 6884694

Claim:
A method of fabricating a nano silicon on insulator (SOI) wafer, the method comprising: preparing a bond wafer formed of mono-crystalline silicon and a base wafer; forming a dielectric on at least one surface of the bond wafer; forming a hydrogen ion implantation unit by implanting hydrogen ions into the mono-crystalline silicon of the bond wafer to a predetermined depth from the surface of the bond wafer at a voltage of less than 30 KeV; contacting and bonding the dielectric of the bond wafer and the base wafer; performing a thermal process at a temperature of less than 400° C. to cleave the hydrogen ion implantation unit of the bond wafer; performing a first hydrogen thermal process on a cleaved surface of a device region bonded to the base wafer to reduce the root mean square roughness (rms) value of the cleaved surface of the device region; and wet etching the cleaved surface of the device region until the thickness of the device region becomes less than a nano scale of 50 nm to form a nano scale device region.