Patent ID: 7750349

Claim:
A switching element substrate for a liquid crystal display device for transmissive display, comprising: an insulating substrate having a first surface and a second surface, opposed to the first surface; a plurality of switching elements formed on one of the first and second surfaces of the insulating substrate; and a first monocrystalline silicon layer formed on and in contact with the other one of the first and second surfaces of the insulating substrate, wherein a thickness of the first monocrystalline silicon layer allows light to be transmitted therethrough, each of the switching elements includes a second monocrystalline silicon layer that is on and in contact with said one of the first and second surfaces of the insulating substrate on which the plurality of switching elements are formed, and the second monocrystalline silicon layer comprises a source region, a channel region and a drain region of said each of the switching elements, and the thickness of the first monocrystalline silicon layer is thinner than a thickness of the second monocrystalline silicon layer.