Patent ID: 6818945
Filing Date: 2004-11-16
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate of a first conductive type; a semiconductor layer of the first conductive type formed on said semiconductor substrate; a base layer of a second conductive type formed on said semiconductor layer; a plurality of columns of stripe trenches formed at predetermined intervals from a surface of said base layer by a predetermined depth; insulating films formed on side surfaces and bottoms of said trenches, respectively; source layers of the first conductive type formed on surface layer portions of said base layer between said trenches, respectively; stripe contact layers of the second conductive type formed each at centers of the surface layer portions of said base layer between said trenches, respectively; a gate electrode formed in every other trench among said plurality of columns of trenches; source electrodes formed in said trenches other than the trenches in which said gate electrodes are formed and on said source layers and said contact layers, respectively; and a drain electrode formed on a rear surface of said semiconductor substrate.