Patent ID: 7112817
Filing Date: 2006-09-26
Classification: G02F,H01L

Abstract:
1. An EL display device comprising: a semiconductor film being formed over an insulating surface; a gate insulating film over the semiconductor film; and wherein the semiconductor film includes, wherein a first width of the first conductive layer in a channel longitudinal direction is wider than a second width of the second conductive layer in the channel longitudinal direction, and wherein the LDD regions overlap the first conductive layer with the gate insulating film interposed therebetween, wherein the first conductive layer comprises at least a first element selected from the group consisting of Ta, W, Ti, Mo, Al, and Cu and the second conductive layer comprises at least a second element selected from the group consisting of Ta, W, Ti, Mo, Al, and Cu, and wherein the first element is different from the second element.