Patent ID: 7279743
Filing Date: 2007-10-09
Classification: H01L

Abstract:
1. A closed cell trench metal-oxide-semiconductor field effect transistor (TMOSFET) comprising: a drain region; a body region disposed above said drain region; a gate region disposed within said body region; a gate insulator region disposed about a periphery of said gate region; a plurality of source regions disposed along the surface of said body region proximate a periphery of said gate insulator region; wherein a first portion of said gate region and a first portion of said gate insulator region are formed as a substantially parallel elongated structure; wherein a second portion of said gate region and a second portion of said gate insulator region are formed as a normal-to-parallel structure; wherein a first portion of said drain region overlaps said parallel structure; and wherein a second portion of said drain region is separated from said normal-to-parallel structure.