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3998678 |
Method of manufacturing thin-film field-emission electron source
A method of manufacturing a thin-film field-emission electron source which is of a sandwich structure of a substrate - metallic film-insulating film - metallic film and which has at least one...
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3988627 |
Electron source
A device for generating a high level electron current pulse includes a housing whose interior can be evacuated from outside the housing, a cathode electrode located in the housing and arranged to...
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3970887 |
Micro-structure field emission electron source
A new and improved microminiature field emission electron source and method of manufacturing is described using a single crystal semiconductor substrate. The substrate is processed in accordance...
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3947716 |
Field emission tip and process for making same
A field emission tip on which a metal adsorbate has been selectively deposited, and a method by which it may be manufactured. In a vacuum, a clean field emission tip is subjected to heating pulses...
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3921078 |
Breakdown protection for field emission electron gun
This invention relates to a field emission type electron gun capable of protecting the emitter tip from damage when electrical breakdown occurs in the gun chamber. The preferred embodiments...
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3921027 |
Microwave beam tube
The improved microwave tube is a tube such as a klystron wherein bunches of electrons are produced by the input cavity of the tube. These electron bunches are well defined and are produced only...
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3921022 |
Field emitting device and method of making same
A non-thermionic field emitting device includes at least one pyramidal shaped field emitting element on one surface of an electrically conductive substrate. At least one needle-like projection is...
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3919580 |
Relativistic electron beam generator
A relativistic electron beam generator for laser media excitation employing a diode type relativistic electron beam source having a cathode shaped such as to provide a rectangular output beam with...
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3906280 |
Electron beam producing system for very high acceleration voltages and beam powers
An electron beam producing system for acceleration voltages in the order of agnitude of megavolts and beam powers in the order of magnitude of gigawatts, comprises a tubular housing of insulating...
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3883760 |
Field emission x-ray tube having a graphite fabric cathode
Several field emission diode x-ray tubes, each having a graphite fabric cathode mounted in a spaced, insulated relationship with respect to an anode are described herein. The different tubes...
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3878424 |
Electron beam generating source
This invention relates to an electron beam generating source comprising a cathode and anode, the opposite and facing surfaces of the cathode and anode being flat and parallel so that the...
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3869636 |
Filament for electron guns
A high power electron beam machine for operating on a workpiece is disclosed in which the beam focus is automatically maintained constant without the necessity of lens current variation regardless...
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3866077 |
ELECTRON EMITTERS
A carbon filament such as a carbon fibre or graphite whisker is used as a source of field emission electrons in an electronic device such as an electron microscope or an electron beam machining...
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3859550 |
HYBRID RECTIFIER
The hybrid rectifier includes a structurally parallel arrangement of field effect emitters and collector surfaces. Each respective emitter-collector section may be spaced apart a preselected...
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3855499 |
COLOR DISPLAY DEVICE
A color display device includes a substrate which forms a partition wall for defining a vacuum space, a plurality of cathode protrusions effecting field emission are formed on the substrate, and a...
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3817592 |
METHOD FOR REPRODUCIBLY FABRICATING AND USING STABLE THERMAL-FIELD EMISSION CATHODES
Methods are disclosed for reproducibly fabricating and using <100> thermal-field built-up field emission cathodes through the selective thermal elimination of contaminants and preservation of...
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3814975 |
ELECTRON EMISSION SYSTEM
A storage system for the mass recording and readout of digital data with ultra high resolution. An electron beam structure is provided for forming a beam of extremely small focused spot diameter,...
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3811059 |
ELECTRON GUN DEVICE OF FIELD EMISSION TYPE
An electron gun device of the field emission type has an enclosure, at least a part of which is of non-magnetic material, an accelerating electrode having a first and second anode each comprising a...
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3809899 |
ELECTRON-BEAM TUBE INCLUDING A THERMIONIC-FIELD EMISSION CATHODE FOR A SCANNING ELECTRON MICROSCOPE
An electron-beam tube for a scanning electron microscope employs the use of a TF built-up field emission cathode which can be operated from preferably the 100 plane in a substantially continuous...
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3810025 |
FIELD EMISSION TYPE ELECTRON GUN
This invention relates to a field emission type electron gun capable of protecting the emitter tip from damage when electrical breakdown occurs in the gun chamber. The preferred embodiments...
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3803510 |
ELECTRON-BEAM PUMPED LASER WITH EXTENDED LIFE
An electron-beam pumped semiconductor laser with an extended life is provided by scanning the electron-beam over a relatively large portion of the surface of the laser element and thereby...
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3798570 |
LASER SYSTEM INCORPORATING A FIELD EFFECT EMITTER
An improved laser system is provided which increases laser efficiency, reduces power consumption and affords simplified construction. The improved laser, which can include any one of several...
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3783325 |
FIELD EFFECT ELECTRON GUN HAVING AT LEAST A MILLION EMITTING FIBERS PER SQUARE CENTIMETER
An electron gun uses a field effect emitter in a vacuum tube, providing the dvantages of cold cathode emission at atmospheric temperature in addition to a simplified control system. Temperature...
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3775630 |
ELECTRON GUN DEVICE OF FIELD EMISSION TYPE
An electron gun device of the field emission type comprising an electron emitting cathode tip, a filament for heating the cathode tip, an anode, and a charged particle emitting electrode, in which...
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3753022 |
MINIATURE, DIRECTED, ELECTRON-BEAM SOURCE
A miniature, directed, electron-beam source, consisting of a conventional field emission source with an associated first anode plate, and several deposited layers of alumina and molybdenum for...
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3746905 |
HIGH VACUUM, FIELD EFFECT ELECTRON TUBE
An improved electron tube is provided which eliminates the need for a heated electron source and affords simplified construction. The tube, a high vacuum tube, is capable of operating over an...
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3745402 |
FIELD EFFECT ELECTRON EMITTER
A unique electron source comprises an oxide-metal composite capable of emitting electrons at ambient temperatures when subjected to an electric field. The quantity of electrons emitted depends on...
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3740662 |
LASER DISCHARGE TUBE
Disclosed are devices for causing electrical discharges in gases. The devices are characterized by the fact that the cathode includes sharp edged protuberances.
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3735187 |
CATHODE BLADE FOR A FIELD EMISSION X-RAY TUBE
A cathode blade comprising a thin electron emitting layer formed from tungsten that projects from a copper support layer. The tungsten layer is extremely thin so that electrons will be readily...
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3735186 |
FIELD EMISSION CATHODE
A field emission cathode comprises a glass substrate in combination with an insulating layer sandwiched between two conducting layers functioning as electrodes. Cavities extending through one of...
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3731139 |
INTERFACE AMPLIFIER
An electrical monitoring apparatus having a single ceramic envelope encased in a ground shield with two separated evacuated compartments, contained in one of the compartments are the active...
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3728570 |
ELECTRON PROBE FORMING SYSTEM
An electron gun comprising an electron source and an anode which together can produce a beam of electrons and which are both disposed substantially within a lens which serves to help focus the...
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3721847 |
APPARATUS FOR PRODUCING X-RAYS FROM AN ELECTRIC INSULATOR
Apparatus for producing X-rays from an electric insulator. Two electrodes are disposed to contact the electric insulator. One electrode has a larger contact area with the insulator than that of the...
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3720856 |
BINARY MATERIAL FIELD EMITTER STRUCTURE
A field emitter structure comprises a body of a binary eutectic alloy wherein thin filaments of the minor component of the alloy are embedded in, and a plurality of the thin filaments project...
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3714486 |
FIELD EMISSION X-RAY TUBE
A miniature X-ray tube with D.C. power supply and a cold cathode field emission electron beam for continuous or steady state X-ray output. A tube a few centimeters in length with a needle cathode...
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3689794 |
PUNCTIFORM CATHODE, IN PARTICULAR SUITABLE FOR DETACHABLE ELECTRIC DISCHARGE TUBES
A punctiform cathode for detachable tubes consisting of a tantalum plate which is secured to the tops of one or more V-shaped filaments.
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3684912 |
TUNGSTEN-ALLOY ELECTRODE WITH BRAZABLE LEADS INTEGRAL WITH EMITTER HEAD
An emitter type electrode comprising a head consisting essentially of a moldable emissive electrode material, tungsten, and from about 0.2 to about 7 percent of a group VIII metal additive that...
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3681641 |
CATHODE WITH DOT-SHAPED EMISSION
A cathode structure, particularly a MK cathode, employs a wick mounted in a coupling member adjacent a supply of emission substance, preferably barium. The wick may be formed of a number of very...
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3678325 |
HIGH-FIELD EMISSION CATHODES AND METHODS FOR PREPARING THE CATHODES
High-field emission cathodes fabricated by implanting metal ions of low work function into a pointed tip portion of a formed cathode which is stable at high temperatures and chemically inert to gas...
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3671798 |
METHOD AND APPARATUS FOR LIMITING FIELD-EMISSION CURRENT
Self-protected electrodes which inherently limit field-emitted currents to a safe value and also stabilize such currents are disclosed. The electrodes are characterized by a plurality of columnar...
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3665241 |
FIELD IONIZER AND FIELD EMISSION CATHODE STRUCTURES AND METHODS OF PRODUCTION
Field-forming devices primarily useful as field ionizers and field emission cathodes and having as a basic element an array of closely spaced cones with sharp points supported on a substrate (in...
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3646841 |
APPARATUS USING ULTRASHARP DIAMOND EDGE FOR ULTRATHIN SECTIONING
Ultrasharp diamond edge is used for molecular and submolecular sectioning at ultralow temperature and as a high-intensity point source for the emission of electrons, ions and neutrons.
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3631291 |
FIELD EMISSION CATHODE WITH METALLIC BORIDE COATING
A field emission cathode comprises a hairpin rhenium filament coated with lanthanum boride and with a fine tungsten tip attached to the rhenium filament serves as an efficient source of electrons....
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3581148 |
DIRECT CURRENT STATIC TRANSFORMER
A direct current static transformer for continuous operation comprising a series of successive stages each including a first conductive plate having a multiplicity of thin, needlelike individual...
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3532923 |
PYROLYTIC GRAPHITE SUPPORT FOR LANTHANUM HEXABORIDE CATHODE EMITTER
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3521073 |
LIGHT EMITTING SEMICONDUCTOR DIODE USING THE FIELD EMISSION EFFECT
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3521113 |
ELECTRON BEAM APPARATUS INCORPORATING A HOLLOW PYRAMIDAL INDIRECTLY HEATED CATHODE MEMBER
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3489944 |
HIGH POWER FIELD EMISSION MICROWAVE TUBE HAVING A CATHODE DELIVERING NANOSECOND RELATIVISTIC ELECTRON BEAMS
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3489943 |
SYSTEM FOR GENERATING INTENSE PULSES OF MICROWAVE POWER USING TRAVELING WAVE ACCELERATION MEANS
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3484643 |
BORON CARBIDE CATHODE FOR COLD EMISSION TYPE CATHODE OF THE FIELD EMISSION TYPE
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