Surface treatment process for liquid crystal cell substrates

Coating processes – Electrical product produced – Metallic compound coating

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427166, 427167, 4272551, 4273762, B05D 512

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053824466

ABSTRACT:
An electrically-conducting substrate coated with silicon dioxide is contacted with alcohol vapors from a source (12) by heating the substrate (16) in a microwave oven. The substrate and source of alcohol are contained in a vessel (10), on which a vacuum is optionally pulled during the heating. The process results in approximately 100 fold reduction in processing time from the prior art time of several hours to several minutes. The process may be used in either inducing perpendicular alignment or parallel alignment of liquid crystals in the cell.

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patent: 5011267 (1991-04-01), Miller et al.
patent: 5200238 (1993-04-01), McArdle et al.
W. P. Bleha, "Progress In Liquid Crystal Light Valves", in Laser Focus/Electro-Optics, pp. 111-120 (Oct. 1983).
John L. Janning, "Thin film surface orientation for liquid crystals" in Applied Physics Letters, vol. 21, pp. 173-174 (1972).

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