Patent ID: 7732820
Filing Date: 2010-06-08
Classification: G02F

Abstract:
1. A substrate for a display device comprising: a scan line; a signal line; a common capacitance wiring; a switching element provided on an insulating substrate; an interlayer insulation film; and a pixel electrode; wherein said switching element is provided at the intersection of the scan line and the signal line; said switching element includes a gate electrode connected to the scan line, a source electrode connected to the signal line, and a drain electrode connected to the pixel electrode; said interlayer insulation film includes a contact hole arranged to connect the drain electrode of the switching element to the pixel electrode; a protective layer is arranged above at least one of the scan line, the signal line, and the common capacitance wiring and the protective layer is made of an insulating material; and a portion of an underlying film under the protective layer contacts a portion of an overlying film over the protective layer.