EP0444580A2
Expired / Lapsed
EP
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Liquid crystal device and display apparatus
Assignee: Canon Inc
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Filing: 1991-02-25
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Granted: —
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Expires: 2011-02-25
Abstract
Abstract A liquid crystal device is formed by disposing a liquid crystal between a pair of oppositely disposed electrodes, at least one of which has a laminated structure including a first layer (2) of ITO (indium tin oxide), a second layer (9) of Mo (molybdenum) or its alloy, and a third layer (4) of Al (aluminum) or its alloy, disposed in the order named. Because of the Mo-based second layer, the ITO layer is protected during development of a photoresist layer formed on the Al-based third layer even if some pinholes are present in the Al-based third layer. The Mo-based second layer can be etched by an etchant for the Al-based third layer so that the entire process is not complicated because of the provision of the Mo-based second layer.
Inventors
- 👤 Takashi Canon Kabushiki Kaisha Enomoto
- 👤 Toshifumi C/O Canon Kabushiki Kaisha Yoshioka
- 👤 Naoya C/O Canon Kabushiki Kaisha Nishida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 20:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/13439
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
62 words
A liquid crystal device, comprising a pair of oppositely disposed electrodes, and a liquid crystal disposed between the electrodes; wherein at least one of the pair of electrodes comprises a laminated structure including a first layer of indium tin oxide, a second layer of molybdenum or its alloy, and a third layer of aluminum or its alloy, disposed in the order named.
Claim 2
Dependent Claim
36 words
A device according to Claim 1, wherein said second layer is formed of an alloy comprising molybdenum and at least one alloying element selected from the group consisting of tantalum, silicon, chromium, vanadium, niobium and tungsten.
Claim 3
Dependent Claim
19 words
A device according to Claim 1, wherein said second layer is formed of an alloy comprising molybdenum and tantalum.
Claim 4
Dependent Claim
19 words
A device according to Claim 1, wherein said second layer is formed of an alloy comprising molybdenum and titanium.
Claim 5
Dependent Claim
23 words
A device according to Claim 3, wherein said tantalum is contained in a proportion of 30 wt. % or less of the alloy.
Claim 6
Dependent Claim
23 words
A device according to Claim 4, wherein said titanium is contained in a proportion of 30 wt. % or less of the alloy.
Claim 7
Dependent Claim
18 words
A device according to Claim 1, wherein said second layer has a thickness of 50 - 2000 Å.
Claim 8
Dependent Claim
18 words
A device according to Claim 1, wherein said second layer has a thickness of 300 - 1000 Å.
Claim 9
Dependent Claim
16 words
A device according to Claim 1, wherein said liquid crystal is a chiral smectic liquid crystal.
Claim 10
Dependent Claim
33 words
A device according to Claim 1, wherein said third layer is formed of an alloy comprising aluminum and at least one alloying element selected from the group consisting of silicon, copper and titanium.
Claim 11
Dependent Claim
18 words
A device according to Claim 1, wherein said third layer has a thickness of 50 - 2000 Å.
Claim 12
Dependent Claim
18 words
A device according to Claim 1, wherein said third layer has a thickness of 100 - 1000 Å.
Claim 13
Dependent Claim
103 words
A display apparatus, comprising: (a) a liquid crystal device which comprises a first substrate having thereon first electrodes each having a laminated structure including a first layer of indium tin oxide, a second layer of molybdenum or its alloy, and a third layer of aluminum or its alloy, disposed in the order named; a second substrate having thereon second electrodes disposed opposite to the first electrodes; and a liquid crystal disposed between the first and second substrates; (b) a first means for supplying signal voltages to the first electrodes and the second electrodes, and (c) a second means for controlling the first means.
Claim 14
Dependent Claim
63 words
An apparatus according to Claim 13, wherein the first electrodes are disposed in the form of stripes, the second electrodes are disposed in the form of stripes intersecting the first electrodes, and in each of the first electrodes, the second and third layers are thinner in width than the first layer and disposed along the length of the stripe of the first layer.
Claim 15
Dependent Claim
25 words
An apparatus according to Claim 14, wherein the second and third layers are disposed along a longitudinal edge of the stripe of the first layer.
Claim 16
Dependent Claim
16 words
An apparatus according to Claim 13, wherein said liquid crystal is a chiral smectic liquid crystal.
References Cited (Backward Citations)
No citation records indexed.
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