Patent ID: 7956362
Filing Date: 2011-06-07
Classification: G02F,H01L

Abstract:
1. A semiconductor device including a wiring, the wiring comprising: a first conductive layer formed over a substrate; a second conductive layer formed directly on a first upper surface of the first conductive layer; a third conductive layer formed over a second upper surface of the first conductive layer and the second conductive layer; and an insulating film formed over the third conductive layer, wherein the third conductive layer is directly in contact with the second upper surface of the first conductive layer and directly in contact with upper and side surfaces of the second conductive layer, wherein the insulating film is directly in contact with side surfaces of the first conductive layer, wherein the first conductive layer extends beyond edges of the second conductive layer, wherein the second conductive layer comprises aluminum, wherein the first conductive layer and the third conductive layer comprise a material selected from the group consisting of silicon, titanium, tantalum, tungsten and molybdenum, wherein the entire first conductive layer and the entire third conductive layer comprise different materials, wherein the first conductive layer and the second conductive layer comprise different materials, and wherein the second conductive layer and the third conductive layer comprise different materials.