Patent ID: 6359306
Filing Date: 2002-03-19
Classification: H01L

Abstract:
A semiconductor device comprising:a first conductivity-type base layer; a second conductivity-type base layer formed on the first conductivity-type base layer; a first conductivity-type source layer formed on the second conductivity-type base layer; a plurality of first trenches formed in parallel to each other, which penetrate from a surface of the first conductivity-type source layer through the first conductivity-type source layer and the second conductivity-type base layer and reach the first conductivity-type base layer; gate insulating films formed on wall surfaces of the first trenches; gate electrodes formed within the first trenches and on the second conductivity-type base layer via the gate insulating films; a plurality of second trenches which penetrate from the surface of the first conductivity-type source layer through the first conductivity-type source layer and reach the second conductivity-type base layer; and a first main electrode formed within the second trenches and electrically connected to the first conductivity-type source layer and the second conductivity-type base layer, wherein portions of the second trenches and portions of the first conductivity-type source layer are alternately arranged in regions among the first trenches.