Method of producing a film which promotes homeotropic orientatio

Details Method of producing a film which promotes homeotropic orientatio Method of producing a film which promotes homeotropic orientatio

1976-05-17

1978-09-05

Ives, P. C.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

428539, 427166, 427255, 350340, C09K 334

Patent

active

041121570

ABSTRACT:
A liquid crystal cell comprising a layer of liquid crystal material interposed between a pair of carrier plates with at least one plate being transparent characterized by a film of metal inorganic salt selected from a group comprising magnesium fluoride, thorium fluoride, zinc sulphide, aluminum oxide, or thorium oxide deposited on at least selected areas of a surface of one of the carrier plates to cause homeotropic orientation or a tilted homeotropic orientation of the molecules of the liquid crystal material contacting the film. To provide the film, the carrier plate is positioned in spaced relationship to a source of the salt which is vaporized and deposited on the plate in the desired areas to produce the column-like structure of the desired angular orientation.

REFERENCES:
patent: 3147132 (1964-09-01), Geffcken
patent: 3585381 (1971-06-01), Hodson
patent: 3834792 (1974-09-01), Janning
patent: 3971869 (1976-07-01), Gelber et al.
patent: 4022934 (1977-05-01), Miller
Bush et al., Liq. Crystal Display Device, IBM Tech. Disc. Bull., vol. 14, No. 1, 6/1971, p. 223.

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