Patent ID: 7795675
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A semiconductor structure comprising a semiconductor die, said die comprising: a first layer of a first conductivity type overlying a second layer of said first conductivity type, and a body region of a second conductivity type opposite to said first conductivity type overlying said first layer; a plurality of trenches formed in said die, each of said trenches extending downward from a surface of said die through said body region and having a bottom located in said first layer; said plurality of trenches comprising an active trench and a plurality of termination trenches, said plurality of termination trenches comprising a first termination trench and a second termination trench, said first termination trench being separated from said second termination trench by a first mesa, said second termination trench being separated from an edge of said die by a second mesa; said structure further comprising: an MIS device, said MIS device comprising: said active trench, said active trench comprising a conductive gate material; and a source region of said first conductivity type located adjacent said surface of said die and a sidewall of said active trench; said structure further comprising a termination region, said termination region comprising: said first and second termination trenches, each of said first and second termination trenches comprising a conductive material, said conductive material in each of said first and second termination trenches being separated from said body region and said first layer by a dielectric layer lining the bottom and sidewalls of each of said first and second termination trenches, said body region extending continuously across said first mesa; a first short-circuit connection between said conductive material in said first termination trench and a first portion of said body region in said first mesa, and a second short-circuit connection between said conductive material in said second termination trench and a second portion of said body region in said second mesa, wherein there is no short-circuit connection between said conductive material in said second termination trench and said conductive material in said first termination trench or between said conductive material in said second termination trench and said first mesa.