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Patent US5470265A successfully refreshed from Google Patents.
US5470265A
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US
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Multi-electron source, image-forming device using multi-electron source, and methods for preparing them
Assignee: Canon Inc
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Filing: 1993-01-28
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Granted: 1995-11-28
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Expires: 2013-01-28
Abstract
Abstract A multi-electron source has a plurality of electron emitting portions arranged on a substrate. Each electron emitting portion comprises a conductive film containing a crack with an average width of 0.05 μm to 1 μm. The electron emitting portions are prepared by subjecting conductive films, preferably of fine particles, to a pulse voltage application treatment.
Inventors
- 👤 Ichiro Nomura
- 👤 Yoshikazu Banno
- 👤 Tetsuya Kaneko
- 👤 Toshihiko Takeda
- 👤 Kumi Iwai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:41
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/316; H01J2201/00; H01J2201/30; H01J2201/316; H01J2201/3165; H01J2329/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
44 words
A method for preparing a multi-electron source which comprises subjecting conductive films arranged between electrodes to a conduction treatment to form a plurality of electron emitting portions at a time, said conduction treatment being carried out by applying a pulse voltage between said electrodes.
Claim 2
Independent Claim
44 words
A method for preparing a multi-electron source which comprises subjecting conductive films arranged between electrodes to a conduction treatment to form a plurality of electron emitting portions at a time, said conduction treatment being carried out by applying a pulse voltage between said electrodes.
Claim 3
Dependent Claim
26 words
The method for preparing a multi-electron source according to claim 1, wherein said pulse voltage is selected in the range of 4 V to 20 V.
Claim 4
Dependent Claim
49 words
The method for preparing a multi-electron source according to claim 1, wherein the pulse width of said pulse voltage is selected in the range of 1 μsec. to 1 sec., and the pulse interval of said pulse voltage is selected in the range of 100 μsec. to 10 sec.
Claim 5
Dependent Claim
20 words
The method for preparing a multi-electron source according to claim 1, wherein said conductive films are made of palladium oxide.
Claim 6
Dependent Claim
31 words
The method for preparing a multi-electron source according to claim 1, wherein the sheet resistance of said conductive films is in the range of 1×10 3 Ω/s to 1×10 7 Ω/s.
Claim 7
Dependent Claim
29 words
The method for preparing a multi-electron source according to claim 1, wherein the pitch of said electron emitting portions is in the range of 0.01 mm to 2 mm.
Claim 8
Dependent Claim
20 words
The method for preparing a multi-electron source according to claim 1, wherein said conductive films are films of fine particles.
Claim 9
Dependent Claim
30 words
The method for preparing a multi-electron source according to claim 7, wherein the average particle diameter of said fine particles is in the range of 10 Å to 0.5 μm.
Claim 10
Independent Claim
49 words
A method for manufacturing an electron emitting device comprising a multi-electron source and modulation means for modulating a plurality of electron beams emitted from said multi-electron source in accordance with an information signal, said multi-electron source being prepared according to the method as defined in any of claims 1-6.
Claim 11
Independent Claim
63 words
A method for manufacturing an image forming device comprising a multi-electron source, modulation means for modulating a plurality of electron beams emitted from said multi-electron source in accordance with an information signal and an image forming member for forming an image by irradiation with the electron beams, said multi-electron source being prepared according to the method as defined in any of claims 1-6.
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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) | 1998-11-27 | 1999-05-29 | 1999-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-27 | 2003-05-29 | 2003-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-27 | 2007-05-29 | 2007-11-28 | $7700.00 | Window Closed / Lapsed |