Patent ID: 6433381
Filing Date: 2002-08-13
Classification: H01L

Abstract:
A semiconductor device comprising:a transistor consisting of a gate electrode formed on a first region of a semiconductor substrate via a gate insulating film, and a first impurity diffusion layer and a second impurity diffusion layer formed in the semiconductor substrate both sides of the gate electrode; a conductive pattern formed in a second region of the semiconductor substrate; a first insulating film formed above the transistor and the conductive pattern over the semiconductor substrate; a first wiring trench formed in the first insulating film at a position higher than the transistor in the first region; a second wiring trench formed in the first insulating film in the second region to have a substantially same depth as the first wiring trench; a first hole formed in the first insulating film under the first wiring trench and above the first impurity diffusion layer of the transistor; a first wiring buried in lower portion of the first wiring trench and connected electrically to the first impurity diffusion layer via the first hole; a second insulating film buried in upper portion of the first wiring trench and formed of material different from the first insulating film; and a second wiring formed of same conductive material as the first wiring in the second wiring trench, and formed thicker than the first wiring, and connected electrically to the conductive pattern.