US4956578A
Expired / Lapsed
US
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Surface conduction electron-emitting device
Assignee: Canon Inc
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Filing: 1988-07-27
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Granted: 1990-09-11
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Expires: 2008-07-27
Abstract
Abstract A surface conduction electron-emitting device includes a high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the periphery of an exposed part of the high-potential electrode, and a low-potential electrode in contact with the periphery of the electron-emitting region. The low-potential electrode may project upward in the thickness direction of the substrate to a higher level than the high-potential electrode. A device for applying a voltage may further provided between the high-potential electrode and low-potential electrode. The low-potential electrode may be divided into plural numbers and potential may be applied to each of the low-potential electrodes independently.
Inventors
- 👤 Akira Shimizu
- 👤 Hidetoshi Suzuki
- 👤 Masahiko Okunuki
- 👤 Haruhito Ono
- 👤 Ichiro Nomura
- 👤 Yoshikazu Banno
- 👤 Toshihiko Takeda
- 👤 Tetsuya Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:06
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/316; H01J2201/00; H01J2201/30; H01J2201/316; H01J2201/3165
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
48 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the entire periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the entire periphery of said electron-emitting region.
Claim 2
Dependent Claim
48 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the entire periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the entire periphery of said electron-emitting region.
Claim 3
Dependent Claim
33 words
The surface conduction electron-emitting device of claim 1, wherein at least one of said high-potential electrode and said low-potential electrode are uneven on the side thereof coming into contact with said electron-emitting region.
Claim 4
Dependent Claim
44 words
The surface conduction electron-emitting device of claim 1, further comprising means for applying a voltage between said high-potential electrode and said low-potential electrode, thereby causing the flowing of an electric current to said electron-emitting region and the emitting of electrons from said electron-emitting region.
Claim 5
Dependent Claim
73 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the entire periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the entire periphery of said electron-emitting region in such a manner that said low-potential electrode projects upward in the thickness direction of the substrate to a higher level than the high-potential electrode.
Claim 6
Dependent Claim
73 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the entire periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the entire periphery of said electron-emitting region in such a manner that said low-potential electrode projects upward in the thickness direction of the substrate to a higher level than the high-potential electrode.
Claim 7
Dependent Claim
33 words
The surface conduction electron-emitting device of claim 4, wherein at least one of said high-potential electrode and said low-potential electrode are uneven on the side thereof coming into contact with said electron-emitting region.
Claim 8
Dependent Claim
44 words
The surface conduction electron-emitting device of claim 4, further comprising means for applying a voltage between said high-potential electrode and said low-potential electrode, thereby causing the flowing of an electric current to said electron-emitting region and the emitting of electrons from said electron-emitting region.
Claim 9
Dependent Claim
72 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a plurality of electron-emitting regions provided in contact with an exposed part of said high-potential electrode so that said plurality of electron-emitting regions extend symmetrically around said exposed part, a plurality of low-potential electrodes provided in contact with the plurality of electron-emitting regions, and means for applying different potentials independently to each of said plurality of low-potential electrodes.
Claim 10
Dependent Claim
72 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a plurality of electron-emitting regions provided in contact with an exposed part of said high-potential electrode so that said plurality of electron-emitting regions extend symmetrically around said exposed part, a plurality of low-potential electrodes provided in contact with the plurality of electron-emitting regions, and means for applying different potentials independently to each of said plurality of low-potential electrodes.
Claim 11
Dependent Claim
31 words
The surface conduction electron-emitting device of claim 7, wherein said plurality of electron-emitting regions emit electrons in response to the flow of an electric current to said plurality of electron-emitting regions.
Claim 12
Dependent Claim
33 words
The surface conduction electron-emitting device of claim 7, wherein said means for applying different potentials is means capable of independently adjusting the magnitude of the potential to be applied to each low-potential electrode.
Claim 13
Dependent Claim
31 words
The surface conduction electron-emitting device of claim 7, wherein said plurality of low-potential electrodes project upward in the thickness direction of the substrate to a higher level than said high-potential electrode.
Claim 14
Dependent Claim
35 words
The surface conduction electron-emitting device of claim 7, wherein at least one of said high-potential electrode and said low-potential electrode are uneven on the side thereof coming into contact with said plurality of electron-emitting regions.
Claim 15
Dependent Claim
56 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a plurality of electron-emitting regions provided in contact with an exposed part of said high-potential electrode so that said plurality of electron-emitting regions extend symmetrically around said exposed part, and a low-potential electrode provided in contact with said plurality of electron-emitting regions.
Claim 16
Dependent Claim
56 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a plurality of electron-emitting regions provided in contact with an exposed part of said high-potential electrode so that said plurality of electron-emitting regions extend symmetrically around said exposed part, and a low-potential electrode provided in contact with said plurality of electron-emitting regions.
Claim 17
Dependent Claim
35 words
The surface conduction electron-emitting device of claim 12, wherein at least one of said high-potential electrode and said low-potential electrode is uneven on the side thereof coming into contact with said plurality of electron-emitting regions.
Claim 18
Dependent Claim
47 words
The surface conduction electron-emitting device of claim 12, further means for applying a voltage between said high-potential electrode and said low-potential electrode, thereby causing the flowing of an electric current to said plurality of electron-emitting regions and the emitting of electrons from said plurality of electron-emitting regions.
Claim 19
Dependent Claim
20 words
The surface conduction electron-emitting device of claim 12, wherein said low-potential electrode is divided into a plurality of low-potential electrodes.
Claim 20
Dependent Claim
29 words
The surface conduction electron-emitting device of claim 15, wherein said means for applying a voltage is means for applying potentials of equal magnitude to said plurality of low-potential electrodes.
Claim 21
Dependent Claim
69 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a plurality of electron-emitting regions provided in contact with an exposed part of said high-potential electrode so that said plurality of electron-emitting regions extend symmetrically around said exposed part, and a low-potential electrode provided in contact with said plurality of electron-emitting regions, wherein said low-potential electrode projects upward in the thickness direction of the substrate.
Claim 22
Dependent Claim
69 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a plurality of electron-emitting regions provided in contact with an exposed part of said high-potential electrode so that said plurality of electron-emitting regions extend symmetrically around said exposed part, and a low-potential electrode provided in contact with said plurality of electron-emitting regions, wherein said low-potential electrode projects upward in the thickness direction of the substrate.
Claim 23
Dependent Claim
35 words
The surface conduction electron-emitting device of claim 17, wherein at least one of said high-potential electrode and said low-potential electrode is uneven on the side thereof coming into contact with said plurality of electron-emitting regions.
Claim 24
Dependent Claim
47 words
The surface conduction electron-emitting device of claim 17, further means for applying a voltage between said high-potential electrode and said low-potential electrode, thereby causing the flowing of an electric current to said plurality of electron-emitting regions and the emitting of electrons from said plurality of electron-emitting regions.
Claim 25
Dependent Claim
20 words
The surface conduction electron-emitting device of claim 17, wherein said low-potential electrode is divided into a plurality of low-potential electrodes.
Claim 26
Dependent Claim
29 words
The surface conduction electron-emitting device of claim 20, wherein said means for applying a voltage is means for applying potentials of equal magnitude to said plurality of low-potential electrodes.
Claim 27
Dependent Claim
92 words
A surface conduction electron-emitting device comprising: at least one high-potential electrode provided on a substrate surface; at least one electron-emitting region provided in contact with an exposed part of said at least one high-potential electrode; and at least one low-potential electrode provided in contact with said at least one electron-emitting region, wherein said at least one high-potential electrode, said at least one electron-emitting region, and said at least one low-potential electrode are positioned and configured so as to together comprise means for focusing electrons emitted from said at least one electron-emitting region.
Claim 28
Dependent Claim
92 words
A surface conduction electron-emitting device comprising: at least one high-potential electrode provided on a substrate surface; at least one electron-emitting region provided in contact with an exposed part of said at least one high-potential electrode; and at least one low-potential electrode provided in contact with said at least one electron-emitting region, wherein said at least one high-potential electrode, said at least one electron-emitting region, and said at least one low-potential electrode are positioned and configured so as to together comprise means for focusing electrons emitted from said at least one electron-emitting region.
References Cited (Backward Citations)
US3978364A
Cited
US4810934A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
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