Patent ID: 8334939
Filing Date: 2012-12-18
Classification: G02F,H01L

Abstract:
1. A manufacturing process for a liquid crystal display device, in which liquid crystal is filled between 1) a first insulating substrate in which unit pixels are arranged in a two-dimensional matrix, having at least the insulating gate transistor, a scan line doubling as a gate electrode and a signal line doubling as a source wire of the insulating gate transistor, and a pixel electrode connected to a drain and 2) a second insulating substrate or a color filter opposing the first insulating substrate, the manufacturing method comprising the steps of: forming the scan line, a pseudo-electrode terminal of the scan line that is part of the scan line, a pseudo-electrode terminal of the signal line, and a pseudo-pixel electrode, all comprising a laminate of a conductive layer and a first metal layer, on a main surface of the first insulating substrate, successively depositing a plasma protective layer, a gate insulating layer, a first amorphous silicon layer with absence or near absence of impurities, and a protective insulating layer, leaving the protective insulating layer narrower than the gate electrode on the first amorphous silicon layer above the gate electrode to expose the first amorphous silicon layer, depositing a second amorphous silicon layer including impurities, forming an opening on the pseudo-electrode terminals of the scan line and signal line and on the pseudo-pixel electrode, and removing the second amorphous silicon layer, the first amorphous silicon layer, the gate insulating layer, the plasma protective layer, and the first metal layer in the opening to expose the electrode terminals of the scan line and the signal line and to expose the pixel electrode, and depositing a second metal layer of one or more layers including a heat-resistant metal layer, and forming the source wire overlapping part of the protective insulating layer and part of the electrode terminal of the signal line and having a photosensitive organic insulating layer on a surface, and forming the drain wire overlapping part of the protective insulating layer and part of the pixel electrode and having the photosensitive organic insulating layer on a surface, both comprising a laminate of the second metal layer and the second amorphous silicon layer.