Heat-resistant insulating coating material and thermal head making use
thereof
    6.
    发明授权
    Heat-resistant insulating coating material and thermal head making use thereof 失效
    使用耐热绝缘涂层材料和热敏头

    公开(公告)号:US5157107A

    公开(公告)日:1992-10-20

    申请号:US400086

    申请日:1989-08-29

    摘要: A polymeric acid is synthesized by the ring-opening poly-addition reaction using a biphenyl tetracarboxylic acid as a tetracarboxylic acid moiety and an aromatic diamine, particularly p-phenylene diamine, as a diamine moiety. An aromatic polyimide resin layer possessing a highly desirable heat-resisting property as a heat-resistant insulating coating material and excelling in adhesive strength relative to a substrate is obtained by adjusting the polymeric acid in viscosity with a suitable organic solvent, applying the resultant polyamic acid on a substrate, and firing the applied layer of the polyamic acid. The substrate, for example, is a conductor layer formed as with copper and used as a multi-layer wiring board for hybrid IC's. In a thermal head which is obtained by forming an insulating layer on a metallic substrate and superposing a multiplicity of heat-generating resistors and conductors connected severally to the heat-generating resistors on insulating layer, the aforementioned aromatic polyamide resin layer is formed on the metallic substrate. This aromatic polyimide resin layer as an insulating layer in the thermal head withstands harsh working temperature conditions and adheres strongly to the metallic substrate. Thus, it manifests various outstanding effects.

    摘要翻译: 通过使用联苯四羧酸作为四羧酸部分和芳族二胺,特别是对苯二胺作为二胺部分的开环多加反应合成聚合酸。 通过用合适的有机溶剂调节聚合酸的粘度,得到具有耐热绝缘涂层材料的耐热性优异的芳族聚酰亚胺树脂层,并且相对于基材具有优异的粘合强度,将得到的聚酰胺酸 在基材上,并焙烧所述聚酰胺酸的涂覆层。 基板例如是与铜形成的导体层,用作混合IC的多层布线基板。 在通过在金属基板上形成绝缘层并将多个发热电阻体和导体分别叠加在绝缘层上的发热电阻器上而获得的热敏头中,上述芳族聚酰胺树脂层形成在金属 基质。 作为热敏头中的绝缘层的芳香族聚酰亚胺树脂层可以承受恶劣的工作温度条件,并且强烈地粘附到金属基底上。 因此,它表现出各种突出的效果。

    Impregnated cathode
    7.
    发明授权
    Impregnated cathode 失效
    浸渍阴极

    公开(公告)号:US4928034A

    公开(公告)日:1990-05-22

    申请号:US273157

    申请日:1988-11-18

    IPC分类号: H01J1/28

    CPC分类号: H01J1/28

    摘要: According to the present invention, an impregnated cathode is provided wherein an alloy layer of iridium and tungsten is formed on a surface of a porous pellet impregnated with an oxide of an alkali earth metal, wherein a crystal structure of the alloy has an .epsilon.II phase comprising an hcp structure whose lattice constants a and c satisfy 2.76.ltoreq.a.ltoreq.2.78 and 4.44.ltoreq.c.ltoreq.4.46, respectively. The impregnated cathode of the present invention maintains stable electron emission characteristics from an early stage of operation.

    摘要翻译: 根据本发明,提供了一种浸渍阴极,其中在浸渍有碱土金属氧化物的多孔颗粒的表面上形成铱和钨的合金层,其中该合金的晶体结构具有εII相 包括其晶格常数a和c分别满足2.76的hcp结构,并且分别为4.44