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    • 44. 发明授权
    • Electron source having a tungsten single crystal electrode
    • 具有钨单晶电极的电子源
    • US08593048B2
    • 2013-11-26
    • US13695625
    • 2010-11-30
    • Ryozo NonogakiToshiyuki Morishita
    • Ryozo NonogakiToshiyuki Morishita
    • H01J1/304
    • H01J1/15H01J1/304H01J37/06H01J2237/06316
    • Provided are an electron source which allows a high-angle current density operation even at a low extraction voltage, and reduces excess current that causes vacuum deterioration; and an electronic device using the electron source. The electron source has a cathode composed of single-crystal tungsten, and a diffusion source provided in the intermediate portion of the cathode. In the cathode, the angle between the axial direction of the cathode and orientation of the cathode is adjusted so that electrons to be emitted from the vicinity of the boundary between surface and surface formed on the tip of the cathode, are emitted substantially parallel to the axis of the cathode. The electronic device is provided with the electron source.
    • 提供了即使在低提取电压下也允许高角度电流密度操作并且减少导致真空劣化的过电流的电子源。 以及使用该电子源的电子装置。 电子源具有由单晶钨组成的阴极和设置在阴极的中间部分的扩散源。 在阴极中,调节阴极的轴向和阴极的<100>取向之间的角度,使得从形成在阴极顶端的表面和表面之间的边界附近发射的电子基本上被发射 平行于阴极的轴线。 电子设备设有电子源。
    • 45. 发明申请
    • ELECTRON SOURCE
    • 电子源
    • US20130049568A1
    • 2013-02-28
    • US13695625
    • 2010-11-30
    • Ryozo NonogakiToshiyuki Morishita
    • Ryozo NonogakiToshiyuki Morishita
    • H01J1/304
    • H01J1/15H01J1/304H01J37/06H01J2237/06316
    • Provided are an electron source which allows a high-angle current density operation even at a low extraction voltage, and reduces excess current that causes vacuum deterioration; and an electronic device using the electron source. The electron source has a cathode composed of single-crystal tungsten, and a diffusion source provided in the intermediate portion of the cathode. In the cathode, the angle between the axial direction of the cathode and orientation of the cathode is adjusted so that electrons to be emitted from the vicinity of the boundary between surface and surface formed on the tip of the cathode, are emitted substantially parallel to the axis of the cathode. The electronic device is provided with the electron source.
    • 提供了即使在低提取电压下也允许高角度电流密度操作并且减少导致真空劣化的过电流的电子源。 以及使用该电子源的电子装置。 电子源具有由单晶钨组成的阴极和设置在阴极的中间部分的扩散源。 在阴极中,调节阴极的轴向和阴极的<100>取向之间的角度,使得从形成在阴极顶端的表面和表面之间的边界附近发射的电子基本上被发射 平行于阴极的轴线。 电子设备设有电子源。
    • 46. 发明申请
    • ELECTRON-SOURCE ROD, ELECTRON SOURCE AND ELECTRONIC DEVICE
    • 电子源,电子源和电子设备
    • US20120169210A1
    • 2012-07-05
    • US13394703
    • 2010-09-24
    • Toshiyuki Morishita
    • Toshiyuki Morishita
    • H01J1/144
    • H01J37/073H01J1/14H01J1/3044H01J2237/06316
    • An electron source is provided that operates at lower temperature and has a low work function and a narrower energy width. The electron source includes a porcelain insulator, two conductive terminals connected to the porcelain insulator, a filament formed between the conductive terminals, and a orientation single crystal rod of at least one metal selected from the group consisting of tungsten, molybdenum, tantalum and rhenium connected to the filament. The rod has an electron-emitting face formed in at its tip region with its {100} crystal face exposed. The rod further includes a diffusion source in its central region that is made of a composite oxide formed from barium oxide and scandium oxide wherein the proportion of barium oxide being 50 mol % or more of BaO and the proportion of scandium oxide being 10 to 50 mol % as Sc2O3 when the mixed oxide is prepared.
    • 提供了在较低温度下工作并具有低功函数和较窄能量宽度的电子源。 电子源包括瓷绝缘体,连接到瓷绝缘体的两个导电端子,形成在导电端子之间的细丝和选自钨,钼,钽的至少一种金属的<100>取向单晶棒 铼连接到灯丝上。 该棒具有在其尖端区域形成的电子发射面,其{100}晶面露出。 该棒还包括由氧化钡和氧化钪形成的复合氧化物构成的中心区域的扩散源,其中氧化钡的比例为50摩尔%以上的BaO,氧化钪的比例为10〜50摩尔 当制备混合氧化物时为Sc2O3。
    • 49. 发明授权
    • Silicon carbide semiconductor device
    • 碳化硅半导体器件
    • US07732821B2
    • 2010-06-08
    • US12073837
    • 2008-03-11
    • Naohiro SuzukiTsuyoshi YamamotoToshiyuki Morishita
    • Naohiro SuzukiTsuyoshi YamamotoToshiyuki Morishita
    • H01L29/72
    • H01L29/66068H01L21/0465H01L29/0615H01L29/063H01L29/0638H01L29/1608H01L29/45H01L29/7828
    • The SiC semiconductor device includes a substrate of a first conduction type made of silicon carbide, a drift layer of the first conduction type made of silicon carbide, the drift layer being less doped than the substrate, a cell portion constituted by a part of the substrate and a part of the drift layer, a circumferential portion constituted by another part of the substrate and another part of the drift layer, the circumferential portion being formed so as to surround the cell portion, and a RESURF layer of a second conduction type formed in a surface portion of the drift layer so as to be located in the circumferential portion. The RESURF layer is constituted by first and second RESURF layers having different impurity concentrations, the second RESURF layer being in contact with an outer circumference of the first RESURF layer and extending to a circumference of the cell portion.
    • SiC半导体器件包括由碳化硅制成的第一导电类型的衬底,由碳化硅制成的第一导电类型的漂移层,漂移层比衬底掺杂少,由衬底的一部分构成的单元部分 以及漂移层的一部分,由基板的另一部分和漂移层的另一部分构成的圆周部分,周向部分形成为围绕电池部分,以及形成在第二导电类型的RESURF层 漂移层的表面部分,以便位于圆周部分中。 RESURF层由具有不同杂质浓度的第一和第二RESURF层构成,第二RESURF层与第一RESURF层的外周接触并延伸到电池单元的周围。