Patent ID: 6982459
Filing Date: 2006-01-03
Classification: H01L

Abstract:
1. A semiconductor device having a vertical type semiconductor element comprising: a super junction structure in which a first semiconductor region of a first conductive type and a second semiconductor region of a second conductive type are alternately aligned; a plurality of trench gate type MOSFET cells, each MOSFET cell including: a body region of the second conductive type disposed over said super junction structure, said body region being electrically connected to said second semiconductor region; a source region of the first conductive type located in said base region; and a gate electrode buried in a trench penetrating said body region to said super junction structure; and an enveloping region of the first conductive type located under said trench to encompass a bottom portion of said trench, wherein said enveloping region electrically connecting to said first semiconductor region to thereby define a channel between said source region and said enveloping region, wherein said enveloping region includes a window to provide the electrical connection between said body region and said second semiconductor region.