Cathode for electron tube and method for manufacturing the same

    公开(公告)号:US07138754B2

    公开(公告)日:2006-11-21

    申请号:US10246396

    申请日:2002-09-19

    IPC分类号: H01J1/142 H01J19/062 H01J1/20

    CPC分类号: H01J1/20 H01J1/142 H01J9/04

    摘要: An oxide cathode for an electron tube and a method for manufacturing the oxide cathode are provided. In the oxide cathode including a sleeve for a heater, a metal substrate formed on the top of the sleeve, and an electron emission material layer coated on the metal substrate, the electron emission material layer is formed by coating a carbonate paste containing an alkaline earth metal carbonate, an organic blowing agent, and a vehicle on the metal substrate by screen printing, and thermally treating the coated carbonate paste. Picture quality degradation due to a Moire phenomenon is reduced by coating the carbonate paste by screen printing to provide an even cathode surface, and degradation of the cathode by Joule heat is reduced, thereby improving electron emission and lifespan characteristics of the cathode.

    Metal cathode and indirectly heated cathode assembly having the same
    29.
    发明授权
    Metal cathode and indirectly heated cathode assembly having the same 失效
    具有相同的金属阴极和间接加热的阴极组件

    公开(公告)号:US06791251B2

    公开(公告)日:2004-09-14

    申请号:US10077762

    申请日:2002-02-20

    IPC分类号: H01J120

    CPC分类号: H01J1/146 H01J1/20

    摘要: A metal cathode for an electron-emission device, and an indirectly heated cathode assembly employing the metal cathode where the metal cathode is formed of a quaternary alloy including 0.1-20% by weight barium (Ba), 0.1-20% by weight a metallic mobilizer facilitating Ba diffusion, a metal with a difference in atomic radius of at least 0.4 Angstrom from the atomic radius of platinum (Pt) or palladium (Pd), the metal being in the range of 0.01 to 30% by weight, and a balance of at least one of Pt and Pd. The metal cathode has a low operating temperature due to its reduced work function with improved current emission capability. The metal cathode can be used for a longer lifetime at high current density. Therefore, the metal cathode can be used effectively in electron-beam devices, such as a Braun tube or picture tube, satisfying larger size, longer life span, high definition, and high luminance requirements of the devices.

    摘要翻译: 用于电子发射器件的金属阴极和使用金属阴极的间接加热的阴极组件,其中金属阴极由包含0.1-20重量%的钡(Ba),0.1-20重量%的金属 促进Ba扩散的迁移剂,原子半径不同于铂(Pt)或钯(Pd)的原子半径至少0.4埃的金属,金属在0.01至30重量%的范围内,余量 的Pt和Pd中的至少一种。 金属阴极具有低的工作温度,由于功率降低,电流发射能力得到改善。 金属阴极可以在高电流密度下使用更长的寿命。 因此,金属阴极可以有效地用于诸如布朗管或显像管的电子束器件中,满足更大尺寸,更长寿命,高清晰度和高亮度要求的器件。

    PROCESS FOR ISOLATING VASCULAR ENDOTHELIAL CELLS FROM EMBRYOID BODIES DIFFERENTIATED FROM EMBRYONC STEM CELLS
    30.
    发明申请
    PROCESS FOR ISOLATING VASCULAR ENDOTHELIAL CELLS FROM EMBRYOID BODIES DIFFERENTIATED FROM EMBRYONC STEM CELLS 有权
    从胚胎干细胞分化的胚胎体分离血管内皮细胞的方法

    公开(公告)号:US20100144032A1

    公开(公告)日:2010-06-10

    申请号:US11913295

    申请日:2007-06-13

    IPC分类号: C12N5/0735 C12N5/071

    摘要: The present invention provides a process for isolating vascular endothelial cells from embryoid bodies differentiated from embryonic stem cells, which comprises: (a) treating embryoid bodies differentiated from embryonic stem cells with 0.005-0.015% trypsin and 0.05-0.15 mM ethylenediaminetetraacetate (EDTA) to obtain vascular endothelial cell clusters; and (b) treating the vascular endothelial cell clusters with 0.1-0.5% trypsin and 0.5-2 mM EDTA so as to separate the vascular endothelial cell clusters into single cells.

    摘要翻译: 本发明提供了从胚胎干细胞分化的胚状体分离血管内皮细胞的方法,其包括:(a)用0.005-0.015%胰蛋白酶和0.05-0.15mM乙二胺四乙酸(EDTA)将胚胎干细胞分化为胚胎干细胞, 获得血管内皮细胞簇; 和(b)用0.1-0.5%胰蛋白酶和0.5-2mM EDTA处理血管内皮细胞簇,以将血管内皮细胞簇分离成单个细胞。