Redundant conductor structures for thin film FET driven liquid c

Details Redundant conductor structures for thin film FET driven liquid c Redundant conductor structures for thin film FET driven liquid c

1987-09-16

1989-02-14

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340719, 350333, 357 237, G09G 336

Patent

active

048049530

ABSTRACT:
Redundancy is provided in the data and gate lines of the liquid crystal display device for improved reliability and greater fabrication yield. The data lines in particular are preferably fabricated in a multilayer structure with two conductive layers sandwiching a narrow insulating strip. The presence of the insulating strip permits the upper conductive line to be formed without step jumps which can exhibit a tendency for poor electrical connection. The upper and lower conductive layers of the data line are in contact for the length of the lower data line, contact being made on either side of the narrower insulating strip. Similar redundancy, without the necessity of providing an intermediary insulating layer is also provided for the gate lines. The redundancy provided in the present invention is particularly suitable for fabrication methods employed in thin film FET driven LCD devices.

REFERENCES:
patent: 4368523 (1983-01-01), Kawate
patent: 4543573 (1985-09-01), Fuyama et al.
patent: 4582395 (1986-04-01), Morozumi
patent: 4597001 (1986-06-01), Bortscheller
patent: 4673969 (1987-06-01), Ariizumi et al.

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