Patent ID: 6677644
Filing Date: 2004-01-13
Classification: H01L

Abstract:
A semiconductor integrated circuit comprising: a supporting substrate; an insulating film provided on the supporting substrate; a semiconductor film provided on the insulating film; and one or more MOS transistors comprising openings formed in the semiconductor film and the insulating film to expose a surface of the supporting substrate, a first gate electrode formed of a portion of the semiconductor film between the openings, a first gate oxide film comprised of a portion of the insulating film on the supporting substrate under the first gate electrode, a second gate oxide film formed on a surface and a sidewall of the first gate electrode and on the supporting substrate at the openings, source and drain regions formed in the supporting substrate at the openings on opposite sides of the first gate electrode and spaced apart from the first gate electrode, and a second gate electrode comprised of a polysilicon film electrically connected to the first gate electrode and formed on the surface of the second gate oxide film directly over the surface and the sidewall of the first gate electrode and directly over surfaces of the supporting substrate at the opening between the first gate electrode and the source and drain regions.