Produits et services

Cathode materials and components being scientific apparatus and instruments, namely, grid cap assemblies, grid cap and anode assemblies, electron gun assemblies, and electron columns for use with microscopy, lithography, metrology, tomography and non-scale displays; advanced metal fabrication systems composed of metal forming, metal cutting, metal notching and metal fabrication machines; free electronic lasers, x-ray generators and microwave generators, namely, thermionic and field emission cathodes, lanthanum hexaboride and cerium hexaboride cathodes, transition metal carbide thermionic and field emission cathodes, cathodes for plasma light sources, and guard ring cathodes made of pyrolytic carbon, graphite or colloidal carbon coating on transition metal carbides; deposited, structured field emitter array cathodes; field emitters, namely, single-crystal carbide and refractory metal, single- crystal etched cathodes for thermal and field electron emitters, STM (Scanning Tunnel Microscopes) probes for scientific purposes, and Schottky electron sources; tungsten wire electrodes for use in electron emission sources; single-crystal carbide probes for STM (Scanning Tunneling Microscopes) probes; scientific apparatus in the nature of liquid metal ion sources (LMIS) for microscopes, namely, liquid-metal ion sources and plasma sources; ion gun assemblies for use in mass Spectrometry; scientific apparatus and instruments, namely, ion columns for use with microscopy, lithography, metrology, tomography, and nanofabrication Scientific and technological research and development related to electron emission testing and new product development and transition metal carbides, thermionic electron emission cathodes, and field electron sources; providing expert advice and consultation to others on the subject of scientific and technological research and development related to emission testing and new product development of transition metal carbides, thermionic electron emission cathodes, and field electron sources; custom design and development of electron emitting materials and electron emission sources; research for others in the field of fundamental electron emissions, and preparing reports in connection therewith; scientific analysis of auger surfaces and field emission measurements over a large range of currents and operating atmospheres

Abrégé

A monolithic graphite heater for heating a thermionic electron cathode includes first and second electrically conductive arms, each one of the first and second electrically conductive arms having an electrode mount at a proximal end, a thermal apex at a distal end, and a transitional region between the electrode mount and the thermal apex; a cathode mount electrically and mechanically coupling each thermal apex to form a maximum Joule-heating region at or adjacent the cathode mount and decreasing Joule-heating along each transitional region; and a press-fit aperture formed in the cathode mount, the press-fit aperture sized to receive at least a portion of the thermionic electron cathode for facilitating thermionic emission produced therefrom in response to operative heat power generation provided by the maximum Joule-heating region.

Classes IPC  ?

• H01J 1/16 - Cathodes à chauffage direct par courant électrique caractérisées par leur forme
• H01J 9/04 - Fabrication des électrodes ou des systèmes d'électrodes des cathodes thermo-ioniques
• H05B 3/14 - Éléments chauffants caractérisés par la composition ou la nature des matériaux ou par la disposition du conducteur caractérisés par la composition ou la nature du matériau conducteur le matériau étant non métallique

Abrégé

A monolithic graphite heater for heating a thermionic electron cathode includes first and second electrically conductive arms, each one of the first and second electrically conductive arms having an electrode mount at a proximal end, a thermal apex at a distal end, and a transitional region between the electrode mount and the thermal apex; a cathode mount electrically and mechanically coupling each thermal apex to form a maximum Joule-heating region at or adjacent the cathode mount and decreasing Joule heating along each transitional region; and a press-fit aperture formed in the cathode mount, the press-fit aperture sized to receive at least a portion of the thermionic electron cathode for facilitating thermionic emission produced therefrom in response to operative heat power generation provided by the maximum Joule-heating region.

Classes IPC  ?

• H01J 1/16 - Cathodes à chauffage direct par courant électrique caractérisées par leur forme
• H01J 9/04 - Fabrication des électrodes ou des systèmes d'électrodes des cathodes thermo-ioniques
• H05B 3/14 - Éléments chauffants caractérisés par la composition ou la nature des matériaux ou par la disposition du conducteur caractérisés par la composition ou la nature du matériau conducteur le matériau étant non métallique

Abrégé

A monolithic graphite heater for heating a thermionic electron cathode includes first and second electrically conductive arms, each one of the first and second electrically conductive arms having an electrode mount at a proximal end, a thermal apex at a distal end, and a transitional region between the electrode mount and the thermal apex; a cathode mount electrically and mechanically coupling each thermal apex to form a maximum Joule-heating region at or adjacent the cathode mount and decreasing Joule heating along each transitional region; and a press-fit aperture formed in the cathode mount, the press-fit aperture sized to receive at least a portion of the thermionic electron cathode for facilitating thermionic emission produced therefrom in response to operative heat power generation provided by the maximum Joule-heating region.

Classes IPC  ?

• H01J 1/22 - Dispositifs de chauffage
• H01J 1/20 - Cathodes à chauffage indirect par courant électrique Cathodes à chauffage par bombardement électronique ou ionique
• H01J 1/15 - Cathodes à chauffage direct par courant électrique
• H01J 9/04 - Fabrication des électrodes ou des systèmes d'électrodes des cathodes thermo-ioniques
• H01J 37/065 - Montage des canons ou de leurs éléments constitutifs
• H01J 1/14 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif

Produits et services

Cathode materials and components, namely, grid cap assemblies, grid cap and anode assemblies, electron gun assemblies, and electron columns for use with microscopy, lithography, metrology, tomography and non-scale displays; specialized neutral-charged electron devices for use in space propulsion acceleration systems, advanced metal fabrication systems, free electronic lasers, x-ray generators and microwave generators, namely, thermionic and field emission cathodes, lanthanum hexaboride and cerium hexaboride cathodes, transition metal carbide thermionic and field emission cathodes, cathodes for plasma light sources, and guard ring cathodes made of pyrolytic carbon, graphite or colloidal carbon coating on transition metal carbides; deposited, structured field emitter array cathodes; field emitters, namely, single-crystal carbide and refractory metal, single-crystal etched cathodes for thermal and field electron emitters, STM (Scanning Tunnel Microscopes) probes, and Schottky electron sources; tungsten wire electrodes for use in electron emission sources; single-crystal carbide probes for STM (Scanning Tunneling Microscopes) probes; scientific apparatus in the nature of liquid metal ion sources (LMIS) for microscopes, namely, liquid-metal ion sources and plasma sources; ion gun assemblies for use in mass Spectrometry; ion columns for use with microscopy, lithography, metrology, tomography, and nanofabrication Scientific and technological research and development related to electron emission testing and new product development and transition metal carbides, thermionic electron emission cathodes, and field electron sources; providing expert advice and consultation to others on the subject of scientific and technological research and development related to emission testing and new product development of transition metal carbides, thermionic electron emission cathodes, and field electron sources; custom design and development of electron emitting materials and electron emission sources; research for others in the field of fundamental electron emissions, and preparing reports in connection therewith; scientific analysis of auger surfaces and field emission measurements over a large range of currents and operating atmospheres

Abrégé

An electron source emitter is made from transition metal carbide materials, including hafnium carbide (HfC), zirconium carbide (ZrC), titanium carbide (TiC), vanadium carbide (VC), niobium carbide (NbC), and tantalum carbide (TaC), which are of high refractory nature. Preferential evaporating and subsequent development of different crystallographic planes of the transition metal carbide emitter having initially at its apex a small radius (50 nm-300 nm) develop over time an on-axis, sharp end-form or tip that is uniformly accentuated circumferentially to an extreme angular form and persists over time. An emitter manufactured to the (110) crystallographic plane and operating at high electron beam current and high temperature for about 20 hours to 40 hours results in the (110) plane, while initially not a high emission crystallographic orientation, developing into a very high field emission orientation because of the geometrical change. This geometrical change allows for a very high electric field and hence high on-axis electron emission.

Classes IPC  ?

• H01J 1/304 - Cathodes à émission d'électrons de champ
• H01J 9/02 - Fabrication des électrodes ou des systèmes d'électrodes

Abrégé

An electron emitter that consists of: a low work function material including Lanthanum hexaboride or Iridium Cerium that acts as an emitter, a cylinder base made of high work function material that has a cone shape where the low work function material is embedded in the high work function material but is exposed at end of the cone and the combined structure is heated and biased to a negative voltage relative to an anode, an anode electrode that has positive bias relative to the emitter, and a wehnelt electrode with an aperture where the cylindrical base protrudes through the wehnelt aperture so the end of the cone containing the emissive area is placed between the wehnelt and the anode.

Classes IPC  ?

• H01J 19/32 - Anodes
• H01J 19/10 - Cathodes thermo-ioniques caractérisées par la forme
• H01J 19/38 - Électrodes de commande, p. ex. grille
• H01J 19/068 - Cathodes thermo-ioniques caractérisées par le matériau avec des composés ayant des propriétés métalliques conductrices, p. ex. du borure de lanthane, comme matériau émissif
• H01J 21/06 - Tubes à voie de décharge unique pourvus de moyens de commande exclusivement électrostatiques
• H01J 19/82 - Circuits non adaptés à une application particulière du tube et non prévus ailleurs

Abrégé

An electron source is made from mixed-metal carbide materials of high refractory nature. Producing field-enhanced thermionic emission, i.e., thermal-field or extended Schottky emission, from these materials entails the use of a certain low work function crystallographic direction, such as, for example, (100), (210), and (310). These materials do not naturally facet because of their refractory nature. The disclosed electron source made from transition metal carbide material is especially useful when installed in a scanning electron microscope (SEM) performing advanced imaging applications that require a high brightness, high beam current source.

Classes IPC  ?

• H01J 1/146 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif avec des métaux ou des alliages comme matériau émissif
• H01J 1/148 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif avec des composés ayant des propriétés métalliques conductrices, p. ex. du borure de lanthane, comme matériau émissif
• H01J 19/10 - Cathodes thermo-ioniques caractérisées par la forme
• H01J 1/14 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif

Abrégé

An electron source is made from mixed-metal carbide materials of high refractory nature. Producing field-enhanced thermionic emission, i.e., thermal-field or extended Schottky emission, from these materials entails the use of a certain low work function crystallographic direction, such as, for example, (100), (210), and (310). These materials do not naturally facet because of their refractory nature. The disclosed electron source made from transition metal carbide material is especially useful when installed in a scanning electron microscope (SEM) performing advanced imaging applications that require a high brightness, high beam current source.

Classes IPC  ?

• H01J 1/14 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif
• H01J 1/146 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif avec des métaux ou des alliages comme matériau émissif
• H01J 19/10 - Cathodes thermo-ioniques caractérisées par la forme
• H01J 1/148 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif avec des composés ayant des propriétés métalliques conductrices, p. ex. du borure de lanthane, comme matériau émissif

Abrégé

A thermionic emission assembly includes a Wehnelt cap that has a cap beam aperture and a cavity within which a cathode is supported. Electrical energy applied to the cathode causes it to reach a sufficiently high temperature to emit a beam of electrons that propagate through the cap beam aperture. An anode having an anode beam aperture is positioned in spatial alignment with the cap beam aperture to receive the electrons. The anode accelerates the electrons and directs them through the anode beam aperture for incidence on a target specimen. A ceramic base forms a combined interface that electrically and thermally separates the Wehnelt cap and the anode. The thermal isolation of the Wehnelt cap from the anode allows the Wehnelt cap to increase in heat to rapidly reach a stable temperature as the cathode emits the beam of electrons.

Classes IPC  ?

• H01J 9/02 - Fabrication des électrodes ou des systèmes d'électrodes
• H01J 9/04 - Fabrication des électrodes ou des systèmes d'électrodes des cathodes thermo-ioniques
• H01J 37/065 - Montage des canons ou de leurs éléments constitutifs

Abrégé

A thermionic emission assembly includes a Wehnelt cap that has a cap beam aperture and a cavity within which a cathode is supported. Electrical energy applied to the cathode causes it to reach a sufficiently high temperature to emit a beam of electrons that propagate through the cap beam aperture. An anode having an anode beam aperture is positioned in spatial alignment with the cap beam aperture to receive the electrons. The anode accelerates the electrons and directs them through the anode beam aperture for incidence on a target specimen. A ceramic base forms a combined interface that electrically and thermally separates the Wehnelt cap and the anode. The interface thermally isolates the Wehnelt cap from the anode to allow the cathode to rapidly reach the sufficiently high temperature to emit the beam of electrons.

Classes IPC  ?

• H01J 9/02 - Fabrication des électrodes ou des systèmes d'électrodes

Produits et services

Cathode materials and components, namely, grid cap assemblies, grid cap and anode assemblies, electron gun assemblies, and electron columns for use with microscopy, lithography, metrology, tomography and non-scale displays; specialized neutral-charged electron devices for use in space propulsion acceleration systems, advanced metal fabrication systems, free electronic lasers, x-ray generators and microwave generators, namely, thermionic and field emission cathodes, lanthanum hexaboride and cerium hexaboride cathodes, transition metal carbide thermionic and field emission cathodes, cathodes for plasma light sources, and guard ring cathodes made of pyrolytic carbon, graphite or colloidal carbon coating on transition metal carbides; deposited, structured field emitter array cathodes; field emitters, namely, single-crystal carbide and refractory metal, single-crystal etched cathodes for thermal and field electron emitters, STM (Scanning Tunnel Microscopes) probes, and Schottky electron sources; tungsten wire electrodes for use in electron emission sources; single-crystal carbide probes for STM (Scanning Tunneling Microscopes) probes Scientific and technological research and development related to electron emission testing and new product development and transition metal carbides, thermionic electron emission cathodes, and field electron sources; providing expert advice and consultation to others on the subject of scientific and technological research and development related to emission testing and new product development of transition metal carbides, thermionic electron emission cathodes, and field electron sources; custom design and development of electron emitting materials and electron emission sources; research for others in the field of fundamental electron emissions, and preparing reports in connection therewith; scientific analysis of auger surfaces and field emission measurements over a large range of currents and operating atmospheres

Produits et services

Cathode materials and components, namely, grid cap assemblies, grid cap and anode assemblies, electron gun assemblies, and electron columns for use with microscopy, lithography, metrology, tomography and non-scale displays; specialized neutral-charged electron devices for use in space propulsion acceleration systems, advanced metal fabrication systems, free electronic lasers, x-ray generators and microwave generators, namely, thermionic and field emission cathodes, lanthanum hexaboride and cerium hexaboride cathodes, transition metal carbide thermionic and field emission cathodes, cathodes for plasma light sources, and guard ring cathodes made of pyrolytic carbon, graphite or colloidal carbon coating on transition metal carbides; deposited, structured field emitter array cathodes; field emitters, namely, single-crystal carbide and refractory metal, single-crystal etched cathodes for thermal and field electron emitters, STM (Scanning Tunnel Microscopes) probes, and Schottky electron sources; tungsten wire electrodes for use in electron emission sources; single-crystal carbide probes for STM (Scanning Tunneling Microscopes) probes Scientific and technological research and development related to electron emission testing and new product development and transition metal carbides, thermionic electron emission cathodes, and field electron sources; providing expert advice and consultation to others on the subject of scientific and technological research and development related to emission testing and new product development of transition metal carbides, thermionic electron emission cathodes, and field electron sources; custom design and development of electron emitting materials and electron emission sources; research for others in the field of fundamental electron emissions, and preparing reports in connection therewith; scientific analysis of auger surfaces and field emission measurements over a large range of currents and operating atmospheres

Produits et services

Cathodes and electron sources, namely, thermionic and [field emission] cathodes for use in microscopy, metrology, lithography and wafer inspection