Patent ID: 8008716
Filing Date: 2011-08-30
Classification: H01L

Abstract:
1. An inverted field-effect-transistor (iT-FET) semiconductor device comprising a source disposed on a bottom and a drain disposed on a top of a semiconductor substrate further comprises: a vertical current conducting channel between said source and said drain disposed along a trenched gate padded by a gate oxide disposed on sidewalls of a trench opened in said semiconductor substrate; a trenched source-body short structure comprises a conductive plug filled in a source-body contact trench wherein said conductive plug extending downwardly in said source-body contact trench from a top surface to a bottom surface of the source-body contact trench above the source disposed at the bottom of said semiconductor substrate with a body dopant region surrounding a bottom portion of said source-body contact trench for electrically shorting a body region surrounding said trenched gate in said substrate to said source disposed on said bottom of said substrate; and said conductive plug in said body-source short structure further comprising a conductive Titanium silicide extending downwardly in said source-body contact trench from said top surface of said semiconductor substrate to said source region.