US4070749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing liquid crystal display devices
Assignee: Hitachi Ltd
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Filing: 1976-06-30
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Granted: 1978-01-31
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Expires: 1996-06-30
Abstract
Abstract A pair of insulating substrates are maintained at a definite spacing, at least one of the substrates being transparent and provided with transparent electrode, the periphery of the substrates is sealed except a liquid crystal inlet opening to form a cell, a liquid crystal is filled into the cell and the opening is sealed with a molten solder in an inert atmosphere.
Inventors
- 👤 Masayoshi Misono
- 👤 Masaharu Koyama
- 👤 Tutomu Asida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/1341; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
A method of manufacturing a liquid crystal display device comprising the steps of forming a dam made of frit glass having a liquid crystal inlet opening on at least one of paired insulating substrates, at least one of the substrates being transparent and provided with a transparent electrode, putting together a resultant structure and the other insulating substrate at the dam and baking the frit glass at a predetermined temperature to complete a liquid crystal cell, metalizing area surrounding the liquid crystal inlet opening, filling a liquid crystal into said cell through said opening, and sealing said liquid crystal inlet opening with a molten sealing material in an atmosphere in which the surface portion and the inner portion of said molten sealing material have substantially the same viscosity.
Claim 2
Independent Claim
128 words
A method of manufacturing a liquid crystal display device comprising the steps of forming a dam made of frit glass having a liquid crystal inlet opening on at least one of paired insulating substrates, at least one of the substrates being transparent and provided with a transparent electrode, putting together a resultant structure and the other insulating substrate at the dam and baking the frit glass at a predetermined temperature to complete a liquid crystal cell, metalizing area surrounding the liquid crystal inlet opening, filling a liquid crystal into said cell through said opening, and sealing said liquid crystal inlet opening with a molten sealing material in an atmosphere in which the surface portion and the inner portion of said molten sealing material have substantially the same viscosity.
Claim 3
Dependent Claim
119 words
In an improved method of manufacturing a liquid crystal display device comprising the steps of forming a dam made of frit glass having a liquid crystal inlet opening on at least one of paired insulating substrates, at least one of the substrates being transparent and provided with a transparent electrode, putting together a resultant structure and the other insulating substrate at the dam and baking the frit glass at a predetermined temperature to complete a liquid crystal cell, metalizing area surrounding the liquid crystal inlet opening, filling a liquid crystal into said cell through said opening, and sealing said liquid crystal inlet opening with a molten sealing material wherein the improvement comprises effecting said sealing in a non-oxidizing environment.
Claim 4
Dependent Claim
119 words
In an improved method of manufacturing a liquid crystal display device comprising the steps of forming a dam made of frit glass having a liquid crystal inlet opening on at least one of paired insulating substrates, at least one of the substrates being transparent and provided with a transparent electrode, putting together a resultant structure and the other insulating substrate at the dam and baking the frit glass at a predetermined temperature to complete a liquid crystal cell, metalizing area surrounding the liquid crystal inlet opening, filling a liquid crystal into said cell through said opening, and sealing said liquid crystal inlet opening with a molten sealing material wherein the improvement comprises effecting said sealing in a non-oxidizing environment.
Claim 5
Dependent Claim
14 words
The method of claim 2 wherein said non-oxidizing environment is an inert gas atmosphere.
Claim 6
Dependent Claim
12 words
The method of claim 2 wherein said sealing material is a solder.
Claim 7
Dependent Claim
12 words
The method of claim 4 wherein said solder is a eutetic solder.
Claim 8
Dependent Claim
19 words
The method of claim 5 wherein said eutetic solder is a predetermined quantity to form a predetermined seal size.
Claim 9
Dependent Claim
20 words
The method of claim 2 wherein said sealing material is a solder and said non-oxidizing environment is an inert gas.
Claim 10
Dependent Claim
16 words
The method of claim 7 wherein said solder is a eutectic solder and a predetermined quantity.
Claim 11
Dependent Claim
27 words
In an improved method of sealing a metallized filling hole in a liquid crystal cell, the improvement comprising sealing said hole with solder in a non-oxidizing environment.
Claim 12
Dependent Claim
27 words
In an improved method of sealing a metallized filling hole in a liquid crystal cell, the improvement comprising sealing said hole with solder in a non-oxidizing environment.
Claim 13
Dependent Claim
20 words
The method of claim 9 wherein said environment is an inert gas atmosphere and said solder is a eutectic solder.
Claim 14
Dependent Claim
19 words
The method of claim 10 wherein said eutectic solder is a predetermined quantity to form a predetermined seal size.
References Cited (Backward Citations)
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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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |