Patent ID: 6727552
Filing Date: 2004-04-27
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate; an insulating layer arranged on a surface of said semiconductor substrate; first and second semiconductor layers separated apart by a predetermined distance on a surface of said insulating layer; a first isolation insulating film embedded between said first semiconductor layer and said second semiconductor layer on the surface of said insulating layer, a second isolation insulating film formed at a main surface of said first semiconductor layer with said first semiconductor layer left thereunder, a plurality of MOS field effect transistors of a first conductivity type formed at the main surface of said first semiconductor layer, and isolated from each other by said second isolation insulating film; a third isolation insulating film formed at a main surface of said second semiconductor layer with said second semiconductor layer left thereunder; and a plurality of MOS field effect transistors of a second conductivity type formed at the main surface of said second semiconductor layer, and isolated from each other by said third isolation insulating film.