Patent ID: 8384150

Claim:
A semiconductor device including: a vertical double diffused MOS transistor with a trench gate structure, further comprising: a semiconductor substrate; a plurality of trenches formed on the semiconductor substrate in a stripe shape; a gate electrode disposed within at least one of said plurality of trenches and projecting from a surface of the semiconductor substrate; a side wall formed on a side surface of the gate electrode; a first metal silicide film formed on a surface of the gate electrode; a second metal silicide film formed on the surface of the semiconductor substrate; and a source electrode, wherein the semiconductor substrate has a source region formed between the plurality of trenches and an adjacent region adjacent to the source region, the plurality of trenches extend to the adjacent region, and the second metal silicide film is formed on the source region and the adjacent region, and is electrically connected to the source region and the adjacent region, wherein the source electrode is electrically connected to the source region via a contact provided on the adjacent region and the second metal silicide film.