EP0301545A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surface conduction electron-emitting device
Assignee: Canon Inc
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Filing: 1988-07-28
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Granted: —
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Expires: 2008-07-28
Abstract
Abstract A surface conduction electron-emitting device is provided which comprises a high-potential electrode (1) provided on a substrate surface, an electron-emitting region (4, 4a, 4b) provided in contact with the periphery of an exposed part of the high-potential electrode, and a low-potential electrode (2a, 2b) further provided 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 means 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
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:51
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: 23
Claim 1
Independent Claim
46 words
A surface conduction electron-emitting device comprising as high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the periphery of said electron-emitting region.
Claim 2
Dependent Claim
46 words
A surface conduction electron-emitting device comprising as high-potential electrode provided on a substrate surface, an electron-emitting region provided in contact with the periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the periphery of said electron-emitting region.
Claim 3
Dependent Claim
20 words
The surface conduction electro-emitting device of Claim 1, wherein said low-potential electrode is divided into a plural number of electrodes.
Claim 4
Dependent Claim
35 words
The surface conduction electron-emitting device of Claim 1, wherein uneveness is made on the side coming into contact with the electron-emitting region, of at least one electrode of the high-potential electrode and the low-potential electrode.
Claim 5
Dependent Claim
41 words
The surface conduction electron-emitting device of Claim 1, comprising a means for applying a voltage between the high-potential electrode and the low-potential electrode, and flowing an electric current to the electron-emitting region to bring electrons to emit from the electron-emitting region.
Claim 6
Dependent Claim
69 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 periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the periphery of said electron-emitting region in such a manner that if projects upward in the thickness direction of the substrate to a higher level than the high-potential electrode.
Claim 7
Dependent Claim
69 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 periphery of an exposed part of said high-potential electrode, and a low-potential electrode further provided in contact with the periphery of said electron-emitting region in such a manner that if projects upward in the thickness direction of the substrate to a higher level than the high-potential electrode.
Claim 8
Dependent Claim
20 words
The surface conduction electron-emitting device of Claim 5, wherein said low-potential electrode is divided into a plural number of electrodes.
Claim 9
Dependent Claim
35 words
The surface conduction electron-emitting device of Claim 5, wherein unevenness is made on the side coming into contact with the electron-emitting region, of at least one electrode of the high-potential electrode and the low-potential electrode.
Claim 10
Dependent Claim
40 words
The surface conduction electron-emitting device of Claim 5, comprising a means for applying a voltage between the high-potential electrode and the low-potential electrode, and flowing an electriccurrent to the electron-emitting region to bring electrons to emit from the electron-emitting region.
Claim 11
Dependent Claim
59 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a electron-emitting region provided in contact with the periphery of an exposed part of said high-potential electrode, a low-potential electrode further provided in contact with the periphery of said electron-emitting region, and a means for applying a voltage between said high-potential electrode and low-potential electrode.
Claim 12
Dependent Claim
59 words
A surface conduction electron-emitting device comprising a high-potential electrode provided on a substrate surface, a electron-emitting region provided in contact with the periphery of an exposed part of said high-potential electrode, a low-potential electrode further provided in contact with the periphery of said electron-emitting region, and a means for applying a voltage between said high-potential electrode and low-potential electrode.
Claim 13
Dependent Claim
19 words
The surface conduction electron-emitting device of Claim 9, wherein said electron-emitting region emits electrons on flowing an electric current.
Claim 14
Dependent Claim
20 words
The surface conduction electron-emitting device of Claim 9, wherein said low-potential electrode is divided into a plural number of electrodes.
Claim 15
Dependent Claim
30 words
The surface conduction electron-emitting device of Claim 9, wherein said means for applying a voltage is means for applying an equal magnitude of potential, to a plurality of low-potential electrodes.
Claim 16
Dependent Claim
35 words
The surface conduction electron-emitting device of Claim 9, wherein unevenness is made on the side coming into contact with the electron-emitting region, of at least one electrode of the high-potential electrode and the low-potential electrode.
Claim 17
Dependent Claim
29 words
The surface conduction electron-emitting device of Claim 9, wherein said low-potential electrode projects upward in the thickness direction of the substrate to a higher level than the high-potential electrode.
Claim 18
Dependent Claim
60 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 periphery of an exposed part of said high-potential electrode, a plurality of low-potential electrodes provided in contact with the periphery of said electron-emitting region, and a means for applying different potential independently to each of said low-potential electrodes.
Claim 19
Dependent Claim
60 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 periphery of an exposed part of said high-potential electrode, a plurality of low-potential electrodes provided in contact with the periphery of said electron-emitting region, and a means for applying different potential independently to each of said low-potential electrodes.
Claim 20
Dependent Claim
19 words
The surface conduction electron-emitting device of Claim 15, wherein said electron-emitting region emits electrons on flowing an electric current.
Claim 21
Dependent Claim
34 words
The surface conduction electron-emitting device of Claim 15, wherein said means for applying different potential is a means capable of independently adjusting the magnitude of the potential to be applied to each low-potential electrode.
Claim 22
Dependent Claim
30 words
The surface conduction electron emitting device of Claim 15, wherein said low-potential electrode projects upward in the thickness direction of the substrate to a higher level than the high-potential electrode.
Claim 23
Dependent Claim
35 words
The surface conduction electron-emitting device of Claim 15, wherein unevenness is made on the side coming into contact with the electron-emitting region, of at least one electrode of the high-potential electrode and the low-potential electrode.
References Cited (Backward Citations)
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