Patent ID: RE39798

Claim:
A liquid crystal display device comprising: a substrate; a plurality of scanning signal bus-lines formed on the substrate and extending in a first direction, a plurality of image signal bus-lines formed on the substrate and extending in a second direction intersecting with the scanning signal bus-lines, thin film transistors located adjacent intersecting points of the scanning signal bus-lines and the image signal bus-lines, wherein gate electrodes of the thin film transistors are connected to the scanning bus-lines, drain electrodes of the thin film transistors are connected to the image signal bus-lines, and source electrodes of the thin film transistors are connected to pixel electrodes to drive a liquid crystal provided in said display, wherein: patterns of a semiconductor layer are formed over said substrate along said image signal bus-lines, said image signal bus-lines are formed of a transparent conductive film, a first conductive film, and an impurity containing semiconductor layer, patterns of said transparent conductive film, said first conductive film, and said impurity containing layer of said image signal bus-lines extend up to said drain electrodes, and patterns of said semiconductor layer along said image signal bus-lines extend up to said source electrodes.