Short circuit preventing film of liquid crystal electro-optical

Details Short circuit preventing film of liquid crystal electro-optical Short circuit preventing film of liquid crystal electro-optical

1997-04-18

1999-01-05

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 43, 349110, 349111, 349138, G02F 1136, G02F 11333

Patent

active

058568530

ABSTRACT:
In an active matrix type liquid crystal electro-optical device using thin-film transistors, a metal film is formed on a transparent electrode that is opposed to the thin-film transistors. The metal film is oxidized by anode oxidation method using the electrode as an anode, to form a metal oxide film that serves as a short circuit preventing film. Alternatively, after a grid-shaped mask is formed on the metal film, the metal film is oxidized using the electrode as an anode, the mask is removed, and the metal film is again anode-oxidized, to form a non-oxidized portion. Thus, transparent and opaque regions, i.e., a black matrix is formed.

REFERENCES:
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patent: 5194136 (1993-03-01), Jeung et al.
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patent: 5311338 (1994-05-01), Kim et al.
patent: 5412494 (1995-05-01), Ishiwata et al.
patent: 5545571 (1996-08-01), Yamazaki et al.

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