US5270846A
Expired / Lapsed
US
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Ferroelectric liquid crystal device having plural inorganic insulating layers
Assignee: Canon Inc
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Filing: 1991-08-13
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Granted: 1993-12-14
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Expires: 2011-08-13
Abstract
Abstract A ferroelectric liquid crystal device is prepared by disposing a ferroelectric liquid crystal between a pair of electrode plate structures Each electrode plate structure is formed by coating a electrode pattern on a substrate with a multi-layer insulating layer including two insulating layers formed through difference processes. In a preferred embodiment, the first insulating layer is formed by sputtering of an inorganic oxide and the second insulating layer is formed as an inorganic oxide layer formed through wet-coating and calcination. The multi-layer insulating layer structure is effective for preventing occurrence of short circuit between opposite electrodes and providing a good alignment characteristic particularly when combined with a polyimide alignment film.
Inventors
- 👤 Yasuyuki Watanabe
- 👤 Kenji Onuma
- 👤 Mayumi Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133345; G02F1/133723; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
20 words
An electrode plate comprising a substrate provided with an electrode pattern with a first said electrode pattern being coated successively
Claim 2
Dependent Claim
20 words
An electrode plate comprising a substrate provided with an electrode pattern with a first said electrode pattern being coated successively
Claim 3
Dependent Claim
16 words
An electrode plate according to claim 1, wherein said polyimide-type alignment film comprises a fluorine-containing polyimide.
Claim 4
Dependent Claim
15 words
An electrode plate according to claim 2, wherein said fluorine-containing polyimide is a trifluoromethyl-substituted polyimide.
Claim 5
Dependent Claim
24 words
An electrode plate according to claim 1, wherein the polyimide-type alignment film has been subjected to a rubbing treatment for aligning liquid crystal molecules.
Claim 6
Dependent Claim
29 words
An electrode plate according to claim 1, wherein said electrode pattern comprises a transparent electrode film and a metal layer disposed on a part of the transparent electrode film.
Claim 7
Dependent Claim
13 words
An electrode plate according to claim 5, wherein said metal layer comprises molybdenum.
Claim 8
Dependent Claim
22 words
An electrode plate according to claim 1, wherein said first insulating layer of Ta 2 O 5 has been formed by sputtering.
Claim 9
Dependent Claim
37 words
An electrode plate according to claim 1, wherein said second insulating layer of a TiO 2 --SiO 2 mixture has been formed by printing and calcination of a mixture of an organotitanium compound and an organosilicon compound.
Claim 10
Dependent Claim
50 words
A color filter plate comprising a substrate provided with a color filter pattern and an electrode pattern, said electrode pattern being coated successively with a first insulating layer of Ta 2 O 5 , a second insulating layer of a TiO 2 -SiO 2 mixture and a polyimide-type alignment film.
Claim 11
Dependent Claim
50 words
A color filter plate comprising a substrate provided with a color filter pattern and an electrode pattern, said electrode pattern being coated successively with a first insulating layer of Ta 2 O 5 , a second insulating layer of a TiO 2 -SiO 2 mixture and a polyimide-type alignment film.
Claim 12
Dependent Claim
17 words
A colon filter plate according to claim 9, wherein said polyimide-type alignment film comprises a fluorine-containing polyimide.
Claim 13
Dependent Claim
16 words
A color filter plate according to claim 10, wherein said fluorine-containing polyimide is a trifluoromethyl-substituted polyimide.
Claim 14
Dependent Claim
25 words
A color filter plate according to claim 9, wherein the polymide-type alignment film has been subjected to a rubbing treatment for aligning liquid crystal molecules.
Claim 15
Dependent Claim
30 words
A color filter plate according to claim 9, wherein said electrode pattern comprises a transparent electrode film and a metal layer disposed on a part of the transparent electrode film.
Claim 16
Dependent Claim
14 words
A color filter plate according to claim 13, wherein said metal layer comprises molybdenum.
Claim 17
Dependent Claim
23 words
A color filter plate according to claim 9, wherein said first insulating layer of Ta 2 O 5 has been formed by sputtering.
Claim 18
Dependent Claim
38 words
A color filter plate according to claim 9, wherein said second insulating layer of a TiO 2 -SiO 2 mixture has been formed by printing and calcination of a mixture of an organotitanium compound and an organosillicon compound.
Claim 19
Dependent Claim
24 words
A color filter plate according to claim 9, wherein a transparent protective layer is disposed between the color filter pattern and the electrode pattern.
Claim 20
Dependent Claim
16 words
A color filter plate according to claim 9, wherein said color filter pattern comprises a polyimide.
Claim 21
Dependent Claim
16 words
A color filter plate according to claim 17, wherein said transparent protective layer comprises a polyimide.
Claim 22
Dependent Claim
57 words
A liquid crystal device comprising a pair of substrates each provided with an electrode pattern, said electrode pattern being coated successively with a first insulating layer of Ta 2 O 5 , a second insulating layer of a TiO 2 --SiO 2 mixture and a polyimide-type alignment film, and a ferroelectric liquid crystal disposed between the substrates.
Claim 23
Dependent Claim
57 words
A liquid crystal device comprising a pair of substrates each provided with an electrode pattern, said electrode pattern being coated successively with a first insulating layer of Ta 2 O 5 , a second insulating layer of a TiO 2 --SiO 2 mixture and a polyimide-type alignment film, and a ferroelectric liquid crystal disposed between the substrates.
Claim 24
Dependent Claim
15 words
A device according to claim 20, wherein said polyimide-type alignment film comprises a fluorine-containing polyimide.
Claim 25
Dependent Claim
14 words
A device according to claim 21, wherein said fluorine-containing polyimide is a trifluoromethyl-substituted polyimide.
Claim 26
Dependent Claim
30 words
A device according to claim 20, wherein the polyimide-type alignment films formed on the pair of substrates have been rubbed in directions which are parallel and identical to each other.
Claim 27
Dependent Claim
26 words
A device according to claim 20, wherein the polyimide-type alignment films formed on the pair of substrates have been rubbed in directions which interest each other.
Claim 28
Dependent Claim
28 words
A device according to claim 20, wherein said electrode pattern comprises a transparent electrode film and a metal layer disposed on a part of the transparent electrode film.
Claim 29
Dependent Claim
12 words
A device according to claim 25, wherein said metal layer comprises molybdenum.
Claim 30
Dependent Claim
21 words
A device according to claim 20, wherein said first insulating layer of Ta 2 O 5 has been formed by sputtering.
Claim 31
Dependent Claim
36 words
A device according to claim 20, wherein said second insulating layer of a TiO 2 -SiO 2 mixture has been formed by printing and calcination of a mixture of an organotitanium compound and an organosilicon compound.
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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) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |