Patent ID: 8829616
Filing Date: 2014-09-09
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate comprising a semiconductor layer on an insulating layer, the semiconductor layer including a semiconductor body having a body contact region and an abutting switching region; trench isolation about the entire perimeter of said semiconductor body; a bridged gate over said semiconductor body, said bridged gate having a bridge gate portion and an abutting gate portion, said bridge gate portion formed over a less than whole region of said body contact region and said gate portion formed over a channel region of said switching region, said bridge gate portion comprising a multilayer first gate stack comprising a gate dielectric layer on said semiconductor body and a first metal gate layer and said gate portion comprising a multilayer second gate stack comprising said gate dielectric layer on said semiconductor body and a second metal gate layer; first and second source/drains formed in said switching region on opposite sides of said channel; wherein a first work function difference between said bridge portion and said body contact region is different from a second work function difference between said gate portion and said channel region; and wherein said first gate metal layer and said second gate metal layer are different layers comprised of different materials and all other layers of said first gate stack and said second gate stack are the same layers.