Patent ID: 8107028
Filing Date: 2012-01-31
Classification: G02F,H01L

Abstract:
1. A display device comprising: a substrate; a plurality of gate lines formed over the substrate; a first insulating film formed over the substrate and the plurality of gate lines; a plurality of data lines formed over the first insulating film, each of the plurality of data lines being formed of a first electrically conductive film; a plurality of thin film transistors, each of the 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 the semiconductor layer, and a second electrode formed by a part of a corresponding one of the plurality of data lines; a second insulating film formed over the plurality of data lines and the plurality of thin film transistors; a plurality of third electrodes formed over the second insulating film, each of the plurality of third electrodes comprising a second electrically conductive film and being coupled to the first electrode of a corresponding one of the plurality of thin film transistors via a first opening formed in the second insulating film; a plurality of transparent conductive films, being coupled to a corresponding one of the plurality of data lines via a second opening formed in the second insulating film; wherein each of the plurality of transparent conductive films, extending from the second opening, includes a first portion; wherein none of the first insulating film and the second insulating film exist between the substrate and the first portion; and wherein, in a cross section of an end portion of the first electrode in a direction of a length of a channel of the plurality of thin film transistors, the impurity doped semiconductor is configured to extend a minimum distance of 0.2 μm beyond the first electrode in the direction of a length of a channel of the plurality of thin film transistors in order to prevent overhang of the first electrode beyond the impurity doped semiconductor, and the i-type semiconductor is configured to extend beyond the impurity doped semiconductor in the direction of a length of a channel of the plurality of thin film transistors.