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Primary Examiner: Kendall, Ralph S.
Assistant Examiner: Smith, John D.
Attorney: Bruestle; Glenn H., Morris; Birgit E.

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Title: Fabrication of liquid crystal devices

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Claims: What is claimed:

1. A method of fabricating a liquid crystal cell comprising:

vacuum depositing a layer of unoxidized metal on a surface of said cell in such manner to provide an oriented structure thereon along which the molecules of a liquid crystal material sympathetically align and,

heating said metal layer in the presence of oxygen to convert said metal to a layer of metal oxide retaining said oriented structure and which is more transparent than said metal layer.

2. The method of claim 1 in which said metal is selected from the group consisting of zinc, nickel, chromium, tin, lead, titanium, and aluminum.

3. The method of claim 1 in which said metal is aluminum.

4. A method of fabricating a liquid crystal device comprising:

providing on each of two spaced apart surfaces of a device enclosure an electrode,

slant evaporating on each of said electrodes a layer of unoxidized metal providing an oriented microstructure on said electrodes along which the molecules of a liquid crystal material sympathetically align,

hermetically sealing together portions of said enclosure with a fused joint formed in the presence of oxygen and at a temperature sufficiently high to oxidize said metal layer to a layer of metal oxide having a higher light transparency than said metal layer and which retains said oriented microstructure, and

introducing a liquid crystal material into said enclosure between said electrodes.
Other info:

Inventors: Sussman, Alan (Princeton, NJ, US)

Application Number: 401234
Filing Date: 1973-09-27
Publication_date: 1976-02-17
Assignee: RCA Corporation (New York, NY)
Primary Class(es): 156/145 29/830, 148/277, 349/124, 349/125, 349/132, 349/187, 349/190, 427/109, 427/124, 427/126.2, 427/166, 438/26, 438/30
Other Classes:
US Patent Ref:

2907672	Oct, 1959	Irland et al.	117/33.
3207937	Sep, 1965	Hannam	117/222.
3578844	May, 1971	Churchill et al.	350/160.
3625591	Dec, 1971	Freiser et al.	350/160.
3731986	May, 1973	Fergason	350/150.

Other Refs: Other References: Janning, John L., "Thin Film Surface Orientation for Liquid Crystals," Applied Physics Letters, Vol. 21, No. 4, Aug. 15, 1972, pp. 173, 174.