Process for preparing orientation film for liquid crystals

Coating processes – Electrical product produced – Electron emissive or suppressive

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427359, 4273722, 427378, C23C 2600

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051512980

ABSTRACT:
A process for preparing an orientation film for liquid crystals which comprises forming a base layer of a thermoplastic or non-thermoplastic resin to be used for the orientation film, on a substrate for liquid crystal display, and rubbing the base layer under heating at a temperature not lower than 50.degree. C. but below the melting temperature of decomposition temperature of the resin.

REFERENCES:
patent: 3994567 (1976-11-01), Matsuo
patent: 4087575 (1978-05-01), Bichara
patent: 4143297 (1979-03-01), Fischer
patent: 4273420 (1981-06-01), Watanabe
patent: 4362771 (1982-12-01), Umeder
patent: 4402999 (1983-09-01), Tatsumichi
patent: 4555436 (1985-11-01), Geurtsen
patent: 4636038 (1987-01-01), Kitahara
patent: 4685771 (1987-08-01), West
patent: 4772522 (1988-09-01), Kubota
"Control and Elimination Disclinations in Twisted Nematic Liquid-Crystal Displays" vol. ED-24, No. 7, Jul. 1977.
"Orientation of Liquid Crystals by Surface Coupling Agents" Appl. Phys. Lett., vol. 22, No. 8, Apr. 15, 1973.
"Liquid-Crystal Orientation Induced by Polymeric Surfaces" Journal of Applied Physics, vol. 47, No. 4, Apr. 1976.

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