Patent ID: 6281547
Filing Date: 2001-08-28
Classification: H01L

Abstract:
A DMOS transistor cell, supported on a substrate of a first conductivity type, comprising:a body region of a second conductivity type disposed in said substrate defining a central portion of said cell;a trench gate filled with polysilicon therein surrounding said body region and defining a boundary of said cell;a source of said first conductivity type defined by a narrow strip of source region disposed along an edge of said trench gate thus said narrow strip of said source region constituting an outer boundary surrounding said body region;said body region further comprising a cross-shaped trench filled with polysilicon horizontally extended to said source region near said outer boundary surrounding said body region; anda source contact region constituting a narrow strip region of said first conductivity type along said cross shaped trench and in electrical contact with said source region.