Patent ID: 6707100
Filing Date: 2004-03-16
Classification: H01L

Abstract:
A trench-gate semiconductor device comprising a gate trench that extends into a semiconductor body from a body surface, through a channel-accommodating region between a source region and an underlying drain region, whereinthe gate, present in the trench, is capacitively coupled to the channel-accommodating region by an intermediate gate dielectric layer at a wall of the trench, the gate comprises a part of semiconductor material adjacent to the gate dielectric layer adjacent to the channel-accommodating region, the gate protrudes upwardly from the trench in the form of a silicide upstanding part which is of a metal silicide material between its top and sidewalls above the level of the body surface, and the gate dielectric layer at least adjacent to the channel-accommodating region is separated from the metal silicide material by at least the semiconductor part of the gate and by the protrusion of the silicide part upward above the level of the body surface.