Active matrix substrate for liquid-crystal display and method of

Details Active matrix substrate for liquid-crystal display and method of Active matrix substrate for liquid-crystal display and method of

1990-08-21

1993-03-02

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 87, 257 59, G02F 113, H01L 2712

Patent

active

051914530

ABSTRACT:
In an active matrix substrate for a liquid-crystal display,a plurality of individual transparent electrodes are arranged in the form of an array, and an array of thin-film transistors is connected to the transparent electrodes for driving the same. Each of the thin-film transistors includes a source region and a drain region which are formed such that impurities are doped at high concentration, an active layer composed of a silicon thin film which is in contact with the source and drain regions and in which at least a part of the silicon thin film covers the source and drain regions, an insulating film which covers the source and drain regions and the active layer, and a gate electrode on the insulating film. Each of the individual transparent electrodes is composed of a silicon thin film contiguous to the active layer of the thin-film transistor and a metal silicide on the silicon thin film. In the active matrix substrate, metal silicide is formed, in the form of an island, onto the silicon thin film on the entire surface of which the individual transparent electrodes are formed. The active matrix substrate of the invention does not use a transparent conductive film made of indium as indium tin oxide and oxide of tin. A pair of drain regions may be so formed as to electrically shield the source region. A method of fabricating the active matrix substrate is also disclosed.

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patent: 4878097 (1989-10-01), Yamazaki
patent: 4929059 (1990-05-01), Takahashi
patent: 4999693 (1991-03-01), Yamazaki et al.
"Polycrystalline Silicon Liquid LCDs with High-Speed Integrated Scanners", Stewart, et al, SID 88 Digest, pp. 404-405.
"A 2/3 Inch Fully Integrated Active-Matrix LCD With Thin Mesh Polysilicon Electrodes", Yamamoto, et al, IEEE 1989; pp. 161-164.
Society For Information Display Internation Symposium Digest of Technical Papers vol. XIX, "9.5-in. Poly-Si TFT-LCD with New Transistor Configuration", Ohshima, et al SID 88 Digest, pp. V and 408-411.

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