公开(公告)号：US09490098B1

公开(公告)日：2016-11-08

申请号：US14992870

申请日：2016-01-11

Applicant: Applied Physics Technologies, Inc.

Inventor： William A. Mackie ,  Gerald G. Magera

IPC: H01J1/146 ,  H01J1/148 ,  H01J19/10 ,  H01J1/14

CPC classification number: H01J1/148 ,  H01J1/14 ,  H01J1/146 ,  H01J19/10 ,  H01J37/06 ,  H01J2201/196 ,  H01J2201/2889 ,  H01J2201/30484 ,  H01J2201/317 ,  H01J2237/06316

Abstract: 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.

Abstract translation: 电子源由具有高耐火性质的混合金属碳化物材料制成。 从这些材料产生场强增强的热离子发射，即热场或延伸的肖特基发射需要使用某种低功函数的晶体学方向，例如（100），（210）和（310） 。 这些材料由于其耐火性质而不自然而然。 所披露的由过渡金属碳化物材料制成的电子源在安装在需要高亮度，远光束电流源的先进成像应用的扫描电子显微镜（SEM）中是特别有用的。

公开(公告)号：US09236212B2

公开(公告)日：2016-01-12

申请号：US13471733

申请日：2012-05-15

Applicant: Takashi Tanaka ,  Motohisa Sakai ,  Yasuhiko Nakano ,  Kan Suganomata ,  Motoaki Esaki ,  Kayo Nakano

Inventor： Takashi Tanaka ,  Motohisa Sakai ,  Yasuhiko Nakano ,  Kan Suganomata ,  Motoaki Esaki ,  Kayo Nakano

IPC: C22F1/18 ,  H01J1/146 ,  B21C1/00 ,  B21C37/04 ,  B22F5/12 ,  C22C1/04 ,  C22C27/04 ,  H01J1/14 ,  H01J1/22 ,  H01J9/04 ,  H01J9/08 ,  H01K1/02 ,  H01K3/02 ,  B21B1/18 ,  B21B15/00 ,  B21B3/00

CPC classification number: H01J1/146 ,  B21B1/18 ,  B21B15/0035 ,  B21B2003/006 ,  B21B2015/0028 ,  B21C1/003 ,  B21C37/045 ,  B22F5/12 ,  B22F2998/10 ,  C22C1/045 ,  C22C27/04 ,  H01J1/14 ,  H01J1/22 ,  H01J9/04 ,  H01J9/08 ,  H01J2201/2889 ,  H01K1/02 ,  H01K3/02 ,  B22F3/10 ,  B22F3/18 ,  B22F3/17 ,  B22F3/20

Abstract: One embodiment provides a tungsten wire containing 1 to 10% by mass of rhenium, the wire having a point indicating a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order; wherein the wire diameter of the tungsten wire is represented by x μm, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x μm, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current.

Abstract translation: 一个实施方案提供了含有1〜10质量％的铼的钨丝，该丝具有通过连接点与直线形成的四边形内的2％伸长率的点，其中x和y的值为点（20,75 ），点（20,87），点（90,75）和点（90,58）; 其中钨丝的线直径由x m表示，并且在电加热后，钨线的伸长率为2％，电流是电线直径x上的y％与熔化电流（FC）的比值 并且其中使用线径x的对数刻度和使用与融合电流的比率y的正常刻度的垂直轴由水平轴表示坐标的半对数坐标系。

公开(公告)号：US2639996A

公开(公告)日：1953-05-26

申请号：US8185449

申请日：1949-03-17

Applicant: SYLVANIA ELECTRIC PROD

Inventor： HAROLD JACOBS ,  GEORGE HEES

IPC: H01J1/146

CPC classification number: H01J1/146 ,  Y10T428/2958

公开(公告)号：US2072576A

公开(公告)日：1937-03-02

申请号：US8722036

申请日：1936-06-25

Applicant: BELL TELEPHONE LABOR INC

Inventor： ACKER JOHN T ,  WILSON JAMES R

IPC: C22C19/00 ,  H01J1/146 ,  H01J1/26

CPC classification number: C22C19/00 ,  H01J1/146 ,  H01J1/26

公开(公告)号：US2061755A

公开(公告)日：1936-11-24

申请号：US52365131

申请日：1931-03-18

Applicant: UNION CARBIDE & CARBON CORP

Inventor： COOPER HUGH S

IPC: H01J1/146

CPC classification number: H01J1/146

公开(公告)号：US12237137B2

公开(公告)日：2025-02-25

申请号：US17221170

申请日：2021-04-02

Applicant: California Institute of Technology

Inventor： Pedro P. Guerrero Vela ,  James E. Polk

IPC: H01J1/02 ,  C04B41/00 ,  C04B41/91 ,  H01J1/146 ,  H01J9/04

Abstract: Aspects include a method for treating a polycrystalline material, the method comprising: exposing a surface of the polycrystalline material to a plasma thereby changing the surface of the polycrystalline material from being characterized by a starting condition to being characterized by a treated condition; wherein: the surface comprises a plurality of crystallites each having the composition MB6, M being a metal element; the plasma comprises ions, the ions being characterized by an average ion flux selected from the range of 1.5 to 100 A/cm2 and an average ion energy that is less than a sputtering threshold energy; the starting condition of the surface is characterized by a first average work function and the treated condition of the surface is characterized by a second average work function; and the second average work function is less than the first average work function.

公开(公告)号：US12014894B2

公开(公告)日：2024-06-18

申请号：US18258461

申请日：2021-12-20

Applicant: Denka Company Limited

Inventor： Hiromitsu Chatani

IPC: H01J1/146 ,  H01J1/16 ,  H01J37/065

CPC classification number: H01J1/146 ,  H01J1/16 ,  H01J37/065 ,  H01J2237/06308

Abstract: A method for manufacturing an electron source includes steps of sandwiching a welding object in which a tip of an electron emission material and a tungsten filament overlap in direct contact between a pair of welding electrodes, and welding the tip and the tungsten filament by causing a current to flow while pressing forces are applied to the welding object by the pair of welding electrodes. A thickness of the welding object is within a range of 50 to 500 μm.

公开(公告)号：US11984291B2

公开(公告)日：2024-05-14

申请号：US18258461

申请日：2021-12-20

Applicant: Denka Company Limited

Inventor： Hiromitsu Chatani

IPC: H01J1/146 ,  H01J1/16 ,  H01J37/065

CPC classification number: H01J1/146 ,  H01J1/16 ,  H01J37/065 ,  H01J2237/06308

Abstract: A method for manufacturing an electron source includes steps of sandwiching a welding object in which a tip of an electron emission material and a tungsten filament overlap in direct contact between a pair of welding electrodes, and welding the tip and the tungsten filament by causing a current to flow while pressing forces are applied to the welding object by the pair of welding electrodes. A thickness of the welding object is within a range of 50 to 500 μm.

公开(公告)号：US20200066474A1

公开(公告)日：2020-02-27

申请号：US16430431

申请日：2019-06-04

Applicant: Modern Electron, LLC

Inventor： John J. Lorr ,  Daniel Kraemer ,  Dusan Coso ,  Max N. Mankin ,  Tony S. Pan ,  Ad de Pijper

IPC: H01J1/146 ,  H01J9/04 ,  H01J9/18

Abstract: Disclosed embodiments include cathodes with conformal cathode surfaces, vacuum electronic devices with cathodes with conformal cathode surfaces, and methods of manufacturing the same. In a non-limiting embodiment, a cathode for a vacuum electronic device includes: a substrate having a predetermined shape; and electron emissive material disposed on at least one portion of at least one surface of the substrate, a shape of the electron emissive material conforming to the predetermined shape of the substrate.

公开(公告)号：US20160300684A1

公开(公告)日：2016-10-13

申请号：US15093853

申请日：2016-04-08

Applicant: The Government of the United States of America, as represented by the Secretary of the Navy

Inventor： Boris N. Feigelson ,  James A. Wollmershauser ,  Kedar Manandhar

IPC: H01J9/04 ,  B22F9/22 ,  H01J1/144 ,  B22F3/14 ,  B22F5/00 ,  H01J1/146 ,  B22F1/02 ,  B22F1/00

CPC classification number: H01J9/042 ,  B22F1/02 ,  B22F3/26 ,  B22F2998/10 ,  B22F2999/00 ,  H01J1/142 ,  H01J1/144 ,  H01J1/146 ,  H01J1/28 ,  B22F3/14 ,  B22F1/0088 ,  B22F2201/013 ,  B22F1/0085 ,  B22F3/02 ,  B22F3/11

Abstract: A thermionic dispenser cathode having a refractory metal matrix with scandium and barium compounds in contact with the metal matrix and methods for forming the same. The invention utilizes atomic layer deposition (ALD) to form a nanoscale, uniform, conformal distribution of a scandium compound on tungsten surfaces and further utilizes in situ high pressure consolidation/impregnation to enhance impregnation of a BaO-CaO-Al2O3 based emissive mixture into the scandate-coated tungsten matrix or to sinter a tungsten/scandate/barium composite structure. The result is a tungsten-scandate thermionic cathode having improved emission.

Abstract translation: 具有与金属基体接触的钪和钡化合物的难熔金属基体的热离子分配器阴极及其形成方法。 本发明利用原子层沉积（ALD）在钨表面上形成钪化合物的纳米尺度均匀的共形分布，并进一步利用原位高压固结/浸渍以增强BaO-CaO-Al 2 O 3基发射混合物的浸渍 钪酸盐涂层的钨基体或烧结钨/钪酸盐/钡复合结构。 结果是具有改善的发射的钨 - 钪酸盐热阴极。