US3885860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of liquid crystal devices
Assignee: RCA Corp
•
Filing: 1973-09-27
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Granted: 1975-05-27
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Expires: 1993-09-27
Abstract
Abstract In liquid crystal devices employing twisted nematic materials, surfaces of the device enclosure are provided with oriented microstructures along which the molecules of the liquid crystal material are aligned. The microstructures are provided by techniques allowing heating thereof to elevated temperatures without loss of the molecular aligning characteristic, and a liquid crystal material is hermetically encapsulated within the device enclosure by means of a fused joint provided at an elevated temperature.
Inventors
- 👤 Howard Sorkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:19
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/1337; G02F1/133734; C; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/051; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A method of fabricating a liquid crystal device comprising: providing on each of two spaced apart surfaces of a device enclosure an electrode, vapor depositing, using a small vapor deposition angle, an inorganic material on at least one of said electrodes to provide on said one electrode a surface along which the molecules of a liquid crystal material sympathetically align, the aligning characteristic of said electrode surface not being disrupted when said electrode surface is exposed to a first temperature, hermetically sealing together portions of said enclosure with a fused joint formed at said first temperature, said electrode surface being heated to said temperature in the process, and introducing a liquid crystal material into said enclosure and into contact with said electrode surface.
Claim 2
Independent Claim
123 words
A method of fabricating a liquid crystal device comprising: providing on each of two spaced apart surfaces of a device enclosure an electrode, vapor depositing, using a small vapor deposition angle, an inorganic material on at least one of said electrodes to provide on said one electrode a surface along which the molecules of a liquid crystal material sympathetically align, the aligning characteristic of said electrode surface not being disrupted when said electrode surface is exposed to a first temperature, hermetically sealing together portions of said enclosure with a fused joint formed at said first temperature, said electrode surface being heated to said temperature in the process, and introducing a liquid crystal material into said enclosure and into contact with said electrode surface.
Claim 3
Dependent Claim
56 words
The method of claim 1 in which said sealing step includes the step of disposing a bead of glass frit along portions of one of two enclosure members each of which includes a different one of said two surfaces, contacting said two members along said bead, and fusion sealing together said two members with said bead.
Claim 4
Dependent Claim
34 words
The method of claim 2 wherein a layer of silicon monoxide is deposited in said vapor depositing step, and said layer is heated in the presence of oxygen to convert it to silicon dioxide.
Claim 5
Dependent Claim
11 words
A liquid crystal device made by the process of claim 3.
Claim 6
Dependent Claim
11 words
A liquid crystal device made by the process of claim 1.
References Cited (Backward Citations)
US3701368A
Cited
US3787110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |