US5773921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field emission cathode having an electrically conducting material shaped of a narrow rod or knife edge
Assignee: Individual
•
Filing: 1995-02-22
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Granted: 1998-06-30
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Expires: 2015-02-22
Abstract
Abstract A field emission cathode device consisting of an electrically conducting material and with a narrow, rod-shaped geometry or a knife edge, to achieve a high amplification of the electric field strength is characterized in that the electron-emitting part of the field emission cathode at least partly has preferred cylindrical host molecules and/or compounds with host compounds and/or cylindrical atomic networks, possibly with end caps with diameters measuring in the nanometer range.
Inventors
- 👤 Till Keesmann
- 👤 Hubert Grosse-Wilde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/304; H01J1/3042; B; B82; B82Y; B82Y10/00; H01J2201/00; H01J2201/30; H01J2201/304; H01J2201/30403; H01J2201/30423; H01J2201/30446; H01J2201/30453; H01J2201/30469; Y; Y10; Y10S; Y10S977/00; Y10S977/84; Y10S977/849; Y10S977/86; Y10S977/875; Y10S977/876; Y10S977/902; Y10S977/932; Y10S977/939
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
A field emission cathode which consists of an electrically conducting material having the shape of a narrow rod or a knife edge to achieve high magnification of the electric field strength, such that the electron-emitting part of the field emission cathode has cylindrical molecules formed at least in part as single-shell or multiple-shell carbon nano-cylinders.
Claim 2
Dependent Claim
55 words
A field emission cathode which consists of an electrically conducting material having the shape of a narrow rod or a knife edge to achieve high magnification of the electric field strength, such that the electron-emitting part of the field emission cathode has cylindrical molecules formed at least in part as single-shell or multiple-shell carbon nano-cylinders.
Claim 3
Dependent Claim
12 words
The device of claim 1, wherein the carbon nano-cylinders have end caps.
Claim 4
Dependent Claim
16 words
The device of claim 1, wherein the single- or multiple-shell carbon nano-cylinders are collected into bundles.
Claim 5
Dependent Claim
13 words
The device of claim 1, wherein the carbon nano-cylinders are filled with metal.
Claim 6
Dependent Claim
22 words
The device of claim 1, wherein the carbon nano-cylinders at least partly have endohedral or exohedral compounds with other atoms or molecules.
Claim 7
Dependent Claim
31 words
The device of claim 1, wherein the field emission cathode forms the tip of a field electron microscope, a field ion microscope, a scanning tunnel microscope, or a scanning power microscope.
Claim 8
Dependent Claim
30 words
The device of claim 1, wherein a plurality of similar field emission cathodes is disposed in a line or a plane, and thereby forms a linear or planar electron source.
Claim 9
Dependent Claim
51 words
The device of claim 1, wherein a plurality of similar field emission cathodes is disposed in a plane in the form of a matrix, and the field emission cathodes can be driven individually, and the field emission cathodes represent the electron sources for the image points of a visual display system.
Claim 10
Dependent Claim
22 words
The device of claim 8, wherein the plurality of similar field emission cathodes is in the range of 10,000 to 100,000 molecules.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-29 | 2001-12-29 | 2002-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-29 | 2005-12-29 | 2006-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-29 | 2009-12-29 | 2010-06-30 | $7700.00 | Window Closed / Lapsed |