Patent ID: 6512252
Filing Date: 2003-01-28
Classification: H01L

Abstract:
A semiconductor device comprising:a substrate; a semiconductor layer provided in a part of the substrate; a gate insulator film provided on the semiconductor layer; a gate electrode provided on the gate insulator film; source and drain regions of a first conductivity type provided in regions at both sides of the gate electrode of the semiconductor layer; a channel region made of a first semiconductor provided in a region between the source and drain regions of the semiconductor layer; a body region made of a second semiconductor of a second conductivity type having a larger potential for carriers at a band edge where carriers travel than that of the first semiconductor, provided in a region below the channel region of the semiconductor layer; and a conductor member for electrically connecting the gate electrode and the body region, wherein the first semiconductor constituting the channel region contains at least Si as a constituent element, and a portion of the semiconductor layer further includes a region for preventing impurities from diffusing to the channel that contains carbon in a concentration from 0.01% to 2%.