Patent ID: 6794716
Filing Date: 2004-09-21
Classification: H01L

Abstract:
A silicon-on-insulator metal oxide semiconductor field effect transistor (SOI MOSFET) comprising:a semiconductor substrate; a buried oxide layer formed on the semiconductor substrate; a body on the buried oxide layer, the body being an active region of a transistor; a gate oxide layer formed on the body; a gate formed on the gate oxide layer; an isolation region adjacent to and at least partially surrounding the body; and a body contact supplying power to the body, a field oxide region formed in the isolation region, the field oxide region at least partially surrounding the body contact; wherein the body contact is formed by forming a trench that perforates the isolation region, the field oxide region, the body, and the buried oxide layer and filling the trench with a conductive material so that the body is electrically connected to the semiconductor substrate, the conductive material including a combination layer of at least two layers selected fomr the group consisting of a metal layer, a tungsten layer and a silicon epitaxial layer.