Patent ID: 7391483

Claim:
A liquid crystal display device in which liquid crystal is filled between a first transparent insulating substrate (active substrate) in which unit pixels having at least an insulating gate transistor, a scan line doubling as a gate electrode and a signal line doubling as a source wire of the said insulating gate transistor, and a pixel electrode connected to a drain wire on a main surface are arranged in a two-dimensional matrix and a second transparent insulating substrate or a color filter opposing the first transparent insulating substrate characterized by the fact that at least: source wires doubling as signal lines and drain wires doubling as pseudo-pixel electrodes, both comprising a laminate made of a transparent conductive layer and a low-resistance metal layer sequentially, are connected to the first semiconductor layers not including impurities forming channels via second semiconductor layers including impurities and heat-resistant metal layers sequentially, wherein the heat-resistant metal layers are located between the transparent conductive layer and the second semiconductor layers including impurities, and the low-resistant metal layers of the pseudo-pixel electrodes in the openings formed in a passivation insulating layer on the first transparent insulating substrate are removed to expose transparent conductive pixel electrodes.