Patent ID: 7605900
Filing Date: 2009-10-20
Classification: G02F,H01L

Abstract:
1. A liquid crystal display device comprising: a substrate; a plurality of gate lines formed over the substrate and extending in a first direction; a first insulating film formed over said plurality of gate lines, a plurality of data lines formed over the first insulating film and extending in a second direction intersecting said first direction, each of said plurality of data lines being formed of a first electrically conductive film and having a data line terminal adapted to be coupled to an external circuit; a plurality of thin film transistors, each of said plurality of thin film transistors having a semiconductor layer comprising an i-type semiconductor and an impurity-doped semiconductor, laminated over the first insulating film, a first electrode formed over said semiconductor layer, and a second electrode formed by a portion of a corresponding one of said plurality of data lines; a second insulating film formed over said plurality of data lines, said first electrodes of said plurality of thin film transistors and said data line terminals, provided with first openings over said first electrodes of said plurality of thin film transistors, and provided with second openings over said data terminals; a plurality of pixel electrodes formed over said second insulating film, each of said plurality of pixel electrodes comprising a second electrically conductive film and being coupled to said first electrode of a corresponding one of said plurality of thin film transistors via a corresponding one of said first openings; and electrically conductive layers comprising said second electrically conductive films separate from said plurality of pixel electrodes, and formed over said data line terminals, each of said electrically conductive layers being coupled to a corresponding one of said plurality of data lines via a corresponding one of said second openings, wherein said second electrically conductive films are transparent electrically conductive films comprised of an oxide, and wherein, in a cross section of an end portion of said first electrode in a direction of a length of a channel of said plurality of thin film transistors, said impurity-doped semiconductor is configured to extend a distance of 0.2 μm or more beyond said first electrode in said direction of a length of a channel of said plurality of thin film transistors, and said i-type semiconductor is configured to extend beyond said impurity-doped semiconductor in said direction of a length of a channel of said plurality of thin film transistors.