Method of producing liquid-crystal display device

Coating processes – Electrical product produced – Condenser or capacitor

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204192C, 427 38, 427 57, 427 87, 427 88, 427 89, 427 90, 427 91, B05D 512

Patent

active

045992460

ABSTRACT:
A thin film transistor array for a liquid crystal display device is produced by simultaneously forming gate electrodes and picture element electrodes; forming islands of a layered structure comprised of a gate insulating film, a thin semiconductor film and a light shielding film in a single masking step; and forming the gate, source and drain wiring metals in contact windows by the "lift-off" technique after using a resist film for opening the contact windows. Only three masking steps are required thereby enabling an increase in production yield and a lower production cost as compared to conventional techniques which typically require seven masking steps.

REFERENCES:
patent: 4452826 (1984-06-01), Shields et al.

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