US4083099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of a twisted nematic field effect mode liquid crystal display cell
Assignee: Sharp Corp
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Filing: 1976-03-31
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Granted: 1978-04-11
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Expires: 1996-03-31
Abstract
Abstract A transparent insulating film having a low adsorption characteristic of organic elements such as silicon dioxide is formed on a glass substrate carrying transparent electrodes formed thereon. The surface of the transparent insulating film is rubbed to form micro-grooves aligned in a predetermined direction. Two glass substrates having internal surfaces carrying micro-grooves formed in the above-mentioned manner are spaced against and adhered to each other and sealed through the use of a glass frit or glass paste, between which liquid crystal compositions are filled.
Inventors
- 👤 Kozo Yano
- 👤 Hiroshi Kuwagaki
- 👤 Sadatoshi Takechi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; G02F1/1337; G02F1/13378; G02F1/133784; C; C09; C09K; C09K2323/00; C09K2323/06; C09K2323/061; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
A method for fabricating a twisted nematic field effect mode liquid crystal display cell comprising the steps of: a. providing two glass substrates each having a major surface thereon; b. forming electrode patterns on the major surfaces of the respective glass substrates; c. coating each of the major surfaces of the glass substrate with a transparent insulator film made of silicone dioxide which resists absorption of organic elements therein; d. rubbing the surface of each of the transparent insulating films to form micro-grooves aligned in a predetermined direction; e. depositing glass frit on at least one of said glass substrates in surrounding relationship to said insulating film thereon; f. securing the other glass substrate to said glass frit in spaced relationship to said at least one glass substrate by means of a glass paste and the application of heat, said glass paste being of a composition which emits organic elements when said heat is applied thereto; and g. filling a liquid crystal composition between said two glass substrates.
Claim 2
Independent Claim
168 words
A method for fabricating a twisted nematic field effect mode liquid crystal display cell comprising the steps of: a. providing two glass substrates each having a major surface thereon; b. forming electrode patterns on the major surfaces of the respective glass substrates; c. coating each of the major surfaces of the glass substrate with a transparent insulator film made of silicone dioxide which resists absorption of organic elements therein; d. rubbing the surface of each of the transparent insulating films to form micro-grooves aligned in a predetermined direction; e. depositing glass frit on at least one of said glass substrates in surrounding relationship to said insulating film thereon; f. securing the other glass substrate to said glass frit in spaced relationship to said at least one glass substrate by means of a glass paste and the application of heat, said glass paste being of a composition which emits organic elements when said heat is applied thereto; and g. filling a liquid crystal composition between said two glass substrates.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said transparent insulating film is applied by electron beam evaporation techniques.
Claim 4
Dependent Claim
23 words
The method of claim 1, wherein the electron beam evaporation is carried out under a pressure of around 5 × 10 -4 torr.
Claim 5
Dependent Claim
19 words
The method of claim 1, wherein the glass frit is deposited through the use of the screen printing method.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |