公开(公告)号：US3689794A

公开(公告)日：1972-09-05

申请号：US3689794D

申请日：1971-02-22

Applicant: PHILIPS CORP

Inventor： ESDONK JOHANNES VAN

IPC: H01J1/16 ,  H01J3/02 ,  H01J29/04 ,  H01J37/065 ,  H01J17/06 ,  H01J1/05 ,  H01J1/15

CPC classification number: H01J37/065 ,  H01J1/16 ,  H01J3/027 ,  H01J29/04

Abstract: A punctiform cathode for detachable tubes consisting of a tantalum plate which is secured to the tops of one or more Vshaped filaments.

Abstract translation: 用于可拆卸管的点状阴极，其由固定到一个或多个V形细丝的顶部的钽板组成。

公开(公告)号：US3454816A

公开(公告)日：1969-07-08

申请号：US3454816D

申请日：1967-08-03

Applicant: SIEMENS AG

Inventor： HOFFMANN HERBERT ,  VITZTHUM DIETHER

IPC: H01J1/28 ,  H01J1/14 ,  H01J1/05 ,  H01J19/02

CPC classification number: H01J1/28

公开(公告)号：US20250149285A1

公开(公告)日：2025-05-08

申请号：US18838365

申请日：2022-11-09

Applicant: WESTLAKE UNIVERSITY

Inventor： Xijun LI

IPC: H01J1/05

Abstract: Provided are an electron emission apparatus and an electronic apparatus which includes a fire-resistant container and a heating power supply, the fire-resistant container being provided with a cavity part, the cavity part having a certain degree of vacuum, an electron emission material being arranged in the cavity part, at least one through hole being formed in the bottom of the fire-resistant container, and after being melted by heating, the electron emission material passing through the through hole so as to have an arc-shaped outwards-convex liquid surface and to emit electrons outwards. The embodiments of the present disclosure have a relatively good electron field emission effect and a high degree of product structure consistency, and achieve easy commissioning. The service life of the electron emission apparatus can be remarkably prolonged compared with that of a traditional thermal field emission or cold field emission filament.

公开(公告)号：US11295925B2

公开(公告)日：2022-04-05

申请号：US17434833

申请日：2020-07-13

Applicant: Param Corporation

Inventor： Hiroshi Yasuda ,  Yoshihisa Ooae ,  Tatsuya Shibaoka ,  Hidekazu Murata

IPC: H01J37/073 ,  H01J37/065 ,  H01J1/05 ,  H01J37/305

Abstract: An electron gun device according to the present invention emits an electron beam by means of heating to a high temperature in a vacuum. According to the present invention, the surface of a material (108, 125), which emits an electron beam, is a hydrogenated metal that is melted and in a liquid state during a high-temperature operation; the liquid hydrogenated metal is contained in a hollow cover tube container (102, 124), which is in a solid state during the high-temperature operation, in the form of a hydrogenated liquid metal or in the form of a liquid metal before hydrogenation, and heated together with the cover tube container (102, 124) to a high temperature; subsequently, the hydrogenated liquid metal is exposed from the cover tube container (102, 124) and forms a liquid surface where gravity, the electric field and the surface tension of the liquid surface are balanced; and an electron beam is emitted from the exposed surface of the hydrogenated liquid metal.

公开(公告)号：US10685808B2

公开(公告)日：2020-06-16

申请号：US16511067

申请日：2019-07-15

Applicant: Massachusetts Institute of Technology

Inventor： Paulo C. Lozano ,  Steven Mark Arestie

IPC: H01J37/08 ,  C25F3/14 ,  H01J1/05 ,  H01J9/02 ,  B01L3/00 ,  H01J49/04

Abstract: An ionic liquid ion source can include a microfabricated body including a base and a tip. The body can be formed of a porous material compatible with at least one of an ionic liquid or room-temperature molten salt. The body can have a pore size gradient that decreases from the base of the body to the tip of the body, such that the at least one of an ionic liquid or room-temperature molten salt is capable of being transported through capillarity from the base to the tip.

公开(公告)号：US10236154B2

公开(公告)日：2019-03-19

申请号：US15805050

申请日：2017-11-06

Applicant: Massachusetts Institute of Technology

Inventor： Paulo C. Lozano ,  Steven Mark Arestie

IPC: H01J37/08 ,  C25F3/14 ,  H01J9/02 ,  H01J1/05 ,  B01L3/00 ,  H01J49/04

Abstract: An ionic liquid ion source can include a microfabricated body including a base and a tip. The body can be formed of a porous material compatible with at least one of an ionic liquid or room-temperature molten salt. The body can have a pore size gradient that decreases from the base of the body to the tip of the body, such that the at least one of an ionic liquid or room-temperature molten salt is capable of being transported through capillarity from the base to the tip.

公开(公告)号：US10049847B2

公开(公告)日：2018-08-14

申请号：US15700297

申请日：2017-09-11

Applicant: Korea University Research and Business Foundation

Inventor： Cheol Jin Lee ,  Dong Hoon Shin ,  Ki Nam Yun ,  Yu Ning Sun

IPC: H01J1/05 ,  H01J9/02 ,  H01J1/304 ,  H01J29/04

Abstract: The present disclosure relates to a manufacturing method for an electron emitting device using a graphite adhesive material. A method of preparing paste for forming a cathode of an electron emitting device includes: mixing and dispersing a nanomaterial for electron emission and a graphite filler in a solvent; drying a mixed solution in which the nanomaterial and the graphite filler are mixed; and preparing paste by mixing a graphite binder with the dried mixture.

公开(公告)号：US07816848B2

公开(公告)日：2010-10-19

申请号：US11986850

申请日：2007-11-26

Applicant: Peng Liu ,  Shou-Shan Fan ,  Liang Liu ,  Kai-Li Jiang

Inventor： Peng Liu ,  Shou-Shan Fan ,  Liang Liu ,  Kai-Li Jiang

IPC: H01J1/05

CPC classification number: H01J1/316 ,  B82Y10/00 ,  H01J2201/30469 ,  H01J2201/3165

Abstract: A surface-conduction electron emitter includes a substrate, two electrodes disposed on the substrate and parallel to each other, and a plurality of line-shaped carbon nanotube elements fixed on at least one electrode. One end of each carbon nanotube element points to the other electrode. An electron source using the surface-conduction electron emitter includes a substrate, a plurality of electrodes disposed on the substrate and parallel to each other, and a plurality of line-shaped carbon nanotube elements fixed on at least one electrode. One end of each carbon nanotube element points to the other electrode.

Abstract translation: 表面传导电子发射体包括基板，设置在基板上的彼此平行的两个电极以及固定在至少一个电极上的多个线状碳纳米管元件。 每个碳纳米管元件的一端指向另一个电极。 使用表面传导电子发射体的电子源包括基板，设置在基板上的多个电极并且彼此平行，以及固定在至少一个电极上的多个线状碳纳米管元件。 每个碳纳米管元件的一端指向另一个电极。

公开(公告)号：US20080054790A1

公开(公告)日：2008-03-06

申请号：US11892737

申请日：2007-08-27

Applicant: Dong-Wook Kim ,  Sungho Jin ,  In-Kyung Yoo

Inventor： Dong-Wook Kim ,  Sungho Jin ,  In-Kyung Yoo

IPC: H01J1/62 ,  H01J1/05

CPC classification number: H01J31/127 ,  H01J9/025 ,  H01J2201/30469 ,  H01J2329/0431 ,  H01J2329/0455 ,  Y10S977/742

Abstract: This invention discloses novel field emitters which exhibit improved emission characteristics combined with improved emitter stability, in particular, new types of carbide or nitride based electron field emitters with desirable nanoscale, aligned and sharped-tip emitter structures.

Abstract translation: 本发明公开了具有改进的发射特性与改进的发射极稳定性相结合的新型场致发射体，特别是新型的具有理想的纳米尺度，排列和锐尖发射极结构的碳化物或氮化物基电子场发射体。

公开(公告)号：US20060066202A1

公开(公告)日：2006-03-30

申请号：US11137725

申请日：2005-05-24

Applicant: Harish Manohara ,  Michael Bronikowski

Inventor： Harish Manohara ,  Michael Bronikowski

IPC: H01J1/14 ,  H01J1/05 ,  H01K1/04 ,  H01J19/06

CPC classification number: H01J9/025 ,  B82Y10/00 ,  H01J1/304 ,  H01J2201/30469 ,  Y10S977/789

Abstract: High-current density field emission sources using arrays of nanofeatures bundles and methods of manufacturing such field emission sources are provided. Variable field emission performance is provided with the variance in the bundle diameter and the inter-bundle spacing, and optimal geometries for the lithographically patterned arrays were determined. Arrays of 1-μm and 2-μm diameter multi-walled carbon nanotube bundles spaced 5 μm apart (edge-to-edge spacing) were identified as the most optimum combination, routinely producing 1.5 to 1.8 A/cm2 at low electric fields of approximately 4 V/μm, rising to >6 A/cm2 at 20 V/μm over a ˜100-μm-diameter area.

Abstract translation: 提供了使用纳米尺寸束阵列的大电流密度场发射源和制造这种场致发射源的方法。 可变场发射性能具有束直径和束间距的变化，并且确定了用于光刻图案阵列的最佳几何形状。 被认为是最优选的组合，通常产生1.5至1.8A / cm 2的数量的间隔5毫米（边缘到边缘间距）的1毫米和2毫米直径的多壁碳纳米管束的数组， SUP>在大约4V / mum的低电场下，在〜100-mum直径的区域上以20V / m 2升高至> 6A / cm 2。