Patent US4410832A successfully refreshed from Google Patents.
US4410832A
Expired / Lapsed
US
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EBS Device with cold-cathode
Assignee: United States Department of the Army
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Filing: 1983-01-27
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Granted: 1983-10-18
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Expires: 2003-01-27
Abstract
Abstract Apparatus and method are described for fabricating a long life cold cathodelectron beam semiconductor device (EBS). Fabrication is given of a vacuum tube structure capable of sustaining sufficiently high vacuum over extended time to prevent poisoning of the cold cathode and steps are give for growth of a plural tip cold cathode structure.
Inventors
- 👤 Bernard Smith
- 👤 Stanley DuBuske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:57
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H03F3/58; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/304; H01J1/3042; H01J21/00; H01J21/02; H01J21/06; H01J21/10; H01J21/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
An electronic tube device comprising: an EBIT electron beam injected target means; a cold cathode emitting means comprising tungsten uranium oxide material, for bombarding said target means with electrons; grid means comprising molybdenum material, for modulating said electrons including means for directing said electrons toward said target means further, including means for electrically biasing said modulating and directing means; sealed tube means comprising sapphire ceramic material for completely enclosing said target means, emitting means, and means for modulating and directing, in a vacuum of 10 -7 to 10 -8 Torr, further including a getter means specifically used for maintaining said vacuum; and means for conducting input electrical signals into, and output electrical signals from, the said electronic tube device, whereby amplification of said input electrical signals may be accomplished by use of the said electronic tube device.
Claim 2
Dependent Claim
137 words
An electronic tube device comprising: an EBIT electron beam injected target means; a cold cathode emitting means comprising tungsten uranium oxide material, for bombarding said target means with electrons; grid means comprising molybdenum material, for modulating said electrons including means for directing said electrons toward said target means further, including means for electrically biasing said modulating and directing means; sealed tube means comprising sapphire ceramic material for completely enclosing said target means, emitting means, and means for modulating and directing, in a vacuum of 10 -7 to 10 -8 Torr, further including a getter means specifically used for maintaining said vacuum; and means for conducting input electrical signals into, and output electrical signals from, the said electronic tube device, whereby amplification of said input electrical signals may be accomplished by use of the said electronic tube device.
Claim 3
Dependent Claim
24 words
The device of claim 1 wherein the said emitting means comprises material from the group of: SiO 2 --Mo, or Sn O 2 .
Claim 4
Dependent Claim
25 words
The device of claim 1 wherein the said means for modulating and means for directing comprises material from the group of: molybdenum, nickel, or tungsten.
Claim 5
Dependent Claim
26 words
The device of claim 1 wherein the said tube means for enclosing comprises prefired material from the group of: Al 99.5, Lucalox 99.99, Molybdenum, or Kovar.
References Cited (Backward Citations)
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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) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |