Patent ID: 7091555
Filing Date: 2006-08-15
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a channel region of a first conductivity provided in a surface of a semiconductor substrate; a source region of a second conductivity different from the first conductivity, the source region being provided on an edge of a trench which extends through the channel region; a gate oxide film provided on an interior wall of the trench; and a gate electrode provided in the trench in opposed relation to the channel region with the intervention of the gate oxide film; wherein the trench includes a plurality of trench portions extending parallel to each other along the first interior side surface in the surface of the semiconductor substrate; and a lower resistance region of the first conductivity extending longitudinally of the trench portions and intervening between the second interior side surface and the source region, the lower resistance region being imparted with a lower resistance by introduction of an impurity.