Patent US5572345A successfully refreshed from Google Patents.
US5572345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device for preventing short circuiting therein
Assignee: Semiconductor Energy Laboratory Co Ltd
•
Filing: 1993-06-09
•
Granted: 1996-11-05
•
Expires: 2013-06-09
Abstract
Abstract An improved liquid crystal device free from current shortage. A pair of substrates confine therebetween a liquid crystal layer and their inner surfaces are provided with a pair of electrodes. In advance of joining the substrates, the insides of the substrates are made even by coating with an organic resin layer. Any projection is buried in the organic resin and the even inside of the substrate is produced.
Inventors
- 👤 Shunpei Yamazaki
- 👤 Toshimitsu Konuma
- 👤 Toshiji Hamatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:26
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; G02F1/133357
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
130 words
A liquid crystal device comprising: a pair of substrates, at least one of said substrates comprising a transparent glass substrate; an electrode arrangement comprising a conductive thin film formed on each of said substrates; and a liquid crystal layer disposed between said substrates; wherein an insulating organic resin layer is interposed between an inside surface of each of said substrates and the conductive thin film in order to make even a surface of the conductive thin film to prevent any projections on said glass substrates from creating a short circuit between said conductive thin films; and said liquid crystal layer and said insulating organic resin layers have respective thicknesses such that the thickness of each insulating organic resin layer is not less than the thickness of said liquid crystal layer.
Claim 2
Dependent Claim
130 words
A liquid crystal device comprising: a pair of substrates, at least one of said substrates comprising a transparent glass substrate; an electrode arrangement comprising a conductive thin film formed on each of said substrates; and a liquid crystal layer disposed between said substrates; wherein an insulating organic resin layer is interposed between an inside surface of each of said substrates and the conductive thin film in order to make even a surface of the conductive thin film to prevent any projections on said glass substrates from creating a short circuit between said conductive thin films; and said liquid crystal layer and said insulating organic resin layers have respective thicknesses such that the thickness of each insulating organic resin layer is not less than the thickness of said liquid crystal layer.
Claim 3
Dependent Claim
14 words
The device of claim 1, wherein said organic resin layer is a spin coating.
Claim 4
Dependent Claim
12 words
The device of claim 1, wherein said organic resin is transparent polyimide.
Claim 5
Dependent Claim
11 words
The device of claim 1, wherein said organic resin is polyetheretherkton.
Claim 6
Dependent Claim
13 words
The device of claim 1, wherein said organic resin is a thermosetting material.
Claim 7
Dependent Claim
27 words
The device of claim 1 further comprising a layer of adhesive disposed between the inside surface of each of said substrates and said insulating organic resin layer.
Claim 8
Dependent Claim
10 words
The device of claim 6 wherein said adhesive is ethylenevinyl-alcohol.
Claim 9
Independent Claim
124 words
A method for forming a liquid crystal device comprising: providing a pair of substrates, at least one of said substrates comprising a transparent glass substrate; providing an electrode arrangement comprising a conductive thin film on each of said substrates; and providing a liquid crystal layer between said pair of substrates; wherein an insulating organic resin layer is interposed between an inside surface of each of said substrates and the conductive thin film in order to make even a surface of the conductive thin film to prevent any projections on said glass substrates from creating a short circuit between said conductive thin films, wherein the thickness of each of said insulating organic resin layers is not less than the thickness of said liquid crystal layer.
Claim 10
Independent Claim
124 words
A method for forming a liquid crystal device comprising: providing a pair of substrates, at least one of said substrates comprising a transparent glass substrate; providing an electrode arrangement comprising a conductive thin film on each of said substrates; and providing a liquid crystal layer between said pair of substrates; wherein an insulating organic resin layer is interposed between an inside surface of each of said substrates and the conductive thin film in order to make even a surface of the conductive thin film to prevent any projections on said glass substrates from creating a short circuit between said conductive thin films, wherein the thickness of each of said insulating organic resin layers is not less than the thickness of said liquid crystal layer.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein said organic resin layer is formed by spin coating.
Claim 12
Dependent Claim
15 words
The method of claim 8 further comprising the step of curing said organic resin layer.
Claim 13
Dependent Claim
34 words
The method of claim 8 wherein said forming step further comprising a sub-step of applying an adhesive to the inside surface of each of said substrates in advance of forming said organic resin layer.
Claim 14
Dependent Claim
13 words
The method of claim 8 wherein said conductive film is formed by sputtering.
Claim 15
Dependent Claim
15 words
The method of claim 10 wherein said organic resin layer is cured at 200°-300° C.
Claim 16
Dependent Claim
19 words
The method of claim 8 further comprising the step of forming an orientation control film on the electrode arrangement.
Claim 17
Dependent Claim
76 words
A liquid crystal device comprising: a pair of transparent substrates opposed to each other, each of said transparent substrates having a transparent electrode formed over an inner surface thereof; a liquid crystal layer interposed between said pair of transparent substrates; and a transparent organic resin film formed between at least one of said transparent substrates and the associated transparent electrode, wherein said transparent organic resin film provides a leveled upper surface for said associated transparent electrode.
Claim 18
Dependent Claim
76 words
A liquid crystal device comprising: a pair of transparent substrates opposed to each other, each of said transparent substrates having a transparent electrode formed over an inner surface thereof; a liquid crystal layer interposed between said pair of transparent substrates; and a transparent organic resin film formed between at least one of said transparent substrates and the associated transparent electrode, wherein said transparent organic resin film provides a leveled upper surface for said associated transparent electrode.
Claim 19
Dependent Claim
24 words
The liquid crystal device of claim 15 wherein said associated transparent electrode directly contacts the leveled upper surface of the transparent organic resin film.
Claim 20
Dependent Claim
24 words
The liquid crystal device of claim 15 wherein said associated transparent electrode directly contacts the leveled upper surface of the transparent organic resin film.
Claim 21
Dependent Claim
28 words
The liquid crystal device of claim 15 wherein said transparent organic resin film is formed over an entire surface of said at least one of said transparent substrates.
Claim 22
Dependent Claim
19 words
The liquid crystal device of claim 15 further comprising an adhesive layer provided on said transparent organic resin film.
Claim 23
Dependent Claim
21 words
The liquid crystal device of claim 32 wherein said adhesive layer comprises ethylenevinylalcohol, and said transparent organic resin film comprises polyetheretherketon.
Claim 24
Dependent Claim
89 words
A liquid crystal device comprising: a first transparent substrate having a first transparent electrode formed thereon; a second transparent substrate opposed to said first transparent substrate, said second transparent substrate having a wiring formed thereon; a transparent organic resin film formed over said second transparent substrate having said wiring formed thereon, said transparent organic resin film having a leveled upper surface; a second transparent electrode formed on the leveled upper surface of the organic resin film; and a liquid crystal layer interposed between said first and second transparent substrates.
Claim 25
Dependent Claim
89 words
A liquid crystal device comprising: a first transparent substrate having a first transparent electrode formed thereon; a second transparent substrate opposed to said first transparent substrate, said second transparent substrate having a wiring formed thereon; a transparent organic resin film formed over said second transparent substrate having said wiring formed thereon, said transparent organic resin film having a leveled upper surface; a second transparent electrode formed on the leveled upper surface of the organic resin film; and a liquid crystal layer interposed between said first and second transparent substrates.
Claim 26
Dependent Claim
24 words
The liquid crystal device of claim 21 wherein said second transparent electrode directly contacts the leveled upper surface of the transparent organic resin film.
Claim 27
Dependent Claim
16 words
The liquid crystal device of claim 2 wherein said transparent organic resin film comprises a polyimide.
Claim 28
Dependent Claim
24 words
The liquid crystal device of claim 21 wherein said transparent organic resin film is formed over an entire surface of said second transparent substrate.
References Cited (Backward Citations)
US4082854A
Cited
US4391491A
Cited
US4367924A
Cited
GB2072368A
Cited
JPS57169728A
Cited
US4494824A
Cited
JPS58111919A
Cited
US4519678A
Cited
US4709991A
Cited
JPS59200216A
Cited
US4601948A
Cited
US4588538A
Cited
US4730903A
Cited
US4738515A
Cited
US5078475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |