| 摘要 |
An active matrix type liquid-crystal display device of IPS mode has its aperture ratio enhanced, thereby to realize an image display which has a wide angle of vision and which is clear and bright. A pixel portion (in FIG. 2 ) in the liquid-crystal display device comprises a TFT ( 115 ) which includes a semiconductor film formed over a substrate, and gate electrodes formed on a first insulating layer, a gate wiring line ( 104 ) which is formed on the first insulating layer, a common wiring line ( 113 ) which crosses the gate wiring line ( 104 ) through a second insulating layer, a pixel electrode ( 112 ) which is formed on the second insulating layer and which is connected with the TFT ( 115 ) of the pixel portion, a signal wiring line ( 106 ) which is formed so as to underlie the common wiring line ( 113 ) through the second insulating layer, and a connecting electrode ( 111 ) which is formed on the second insulating layer. The pixel electrode ( 112 ) and the common wiring line ( 113 ) are arranged so as to generate an electric field parallel to the plane of the substrate, and the signal wiring line ( 106 ) and the semiconductor film are connected through the connecting electrode ( 111 ).
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