Patent ID: 7952093
Filing Date: 2011-05-31
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer over a substrate having an insulating surface; a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebetween, the gate electrode consisting of a first conductive layer and a second conductive layer, wherein the first conductive layer is physically in contact with the second conductive layer in the gate electrode; and a wiring electrically connected to the gate electrode, the wiring comprising a first conductive layer and a second conductive layer with a third conductive layer interposed therebetween, wherein the second conductive layer of the gate electrode and the second conductive layer of the wiring are a same layer, wherein, in the wiring, top and side surfaces of the third conductive layer are in contact with a bottom surface of the second conductive layer, and wherein the number of conductive layers constituting the wiring is different from that of conductive lavers constituting the gate electrode.