Patent ID: 8879041

Claim:
A liquid crystal display device comprising: a first substrate including an insulative substrate, a first electrically conductive layer, a second electrically conductive layer, a first insulation film, a third electrically conductive layer, a second insulation film, a fourth electrically conductive layer and a first alignment film, the first electrically conductive layer including a gate line located on an inner surface of the insulative substrate, a common potential line and a first pad portion, the second electrically conductive layer including a common electrode which is located on the inner surface of the insulative substrate and is put in contact with the common potential line, and a second pad portion stacked on the first pad portion, the first insulation film covering the first electrically conductive layer and the second electrically conductive layer, the third electrically conductive layer including a source line located on the first insulation film, the second insulation film covering the third electrically conductive layer and the first insulation film, the fourth electrically conductive layer including a pixel electrode which is located on the second insulation film and in which a slit facing the common electrode is formed, and a third pad portion which is put in contact with the second pad portion via a first contact hole penetrating through the first insulation film and the second insulation film to the second pad portion, and the first alignment film covering the pixel electrode and the second insulation film; a second substrate including a second alignment film which is opposed to the first alignment film; and a liquid crystal layer held between the first alignment film and the second alignment film.