Method for soldering electronic components onto a printed wiring board
using a solder paste
    7.
    发明授权
    Method for soldering electronic components onto a printed wiring board using a solder paste 失效
    使用焊膏将电子元件焊接到印刷线路板上的方法

    公开(公告)号:US4759490A

    公开(公告)日:1988-07-26

    申请号:US109791

    申请日:1987-10-16

    申请人: Masayuki Ochiai

    发明人: Masayuki Ochiai

    摘要: A soldering method using a solder paste composed of solder alloy powder and soldering flux comprising rosin, thixotropic agent, activator, organic solvent and azobis compound such as 1,1'-azobis (cyclohexane-1-carbonitrile) as a free radical generator. The 1,1'-azobis (cyclohexane-1-carbonitrile) generates free radicals of cychlohexane-1-carbonitrile when heated in soldering, and the generated free radicals urge the activator to liberate hydrogen halide which enhances a removing effect of oxide film over a metal surface to be soldered. The azobis compound contributes to diminish the amount of activator and, consequently, hydrogen halide in the flux. The viscosity of the solder paste does not vary for a long time, which results in allowing the solder paste have a long shelf life. Since generation of the free radical is not decreased even though a soldering temperature decreased, which results in increasing solderability for low temperature soldering.

    Solder paste and terminal-to-terminal connection structure
    9.
    发明授权
    Solder paste and terminal-to-terminal connection structure 失效
    焊膏和端对端连接结构

    公开(公告)号:US06867378B2

    公开(公告)日:2005-03-15

    申请号:US10078424

    申请日:2002-02-21

    摘要: A solder paste contains a solder alloy powder and a metal powder dispersed in a flux. The solder alloy contains Sn and Zn, whereas the metal powder contains at least one element selected from the group consisting of Pd, Ti, and Ni. Preferably, the metal powder is contained in an amount exceeding the solubility limit of the metal powder with respect to the solder alloy at the melting point of the solder alloy powder. The solder paste may be used to form a structure for electrically connecting two objects by interposing a solder layer between their terminals.

    摘要翻译: 焊膏含有分散在焊剂中的焊料合金粉末和金属粉末。 焊料合金含有Sn和Zn,而金属粉末含有选自Pd,Ti和Ni中的至少一种元素。 优选地,在焊料合金粉末的熔点,金属粉末的含量超过金属粉末相对于焊料合金的溶解度极限的量。 焊膏可以用于形成用于通过在其端子之间插入焊料层来电连接两个物体的结构。

    Fluid bearing device
    10.
    发明授权
    Fluid bearing device 失效
    流体轴承装置

    公开(公告)号:US06712513B2

    公开(公告)日:2004-03-30

    申请号:US09790532

    申请日:2001-02-23

    IPC分类号: F16C3206

    摘要: A fluid bearing device achieves superior in wear start-stop resistance and in manufacturing ability. The fluid bearing device includes a shaft having a flange portion, a sleeve opposing to the shaft across a fluid bearing clearance of a radial fluid bearing, a counterpart member opposing to at least one of plane of the flange portion across a fluid bearing clearance of a thrust bearing. The flange portion and the sleeve portion being formed of copper alloy of mutually difference composition.

    摘要翻译: 流体轴承装置实现了优异的耐磨起始阻力和制造能力。 所述流体轴承装置包括轴,所述轴具有凸缘部分,与所述轴相对的套筒,跨越所述径向流体轴承的流体轴承间隙;与所述凸缘部分的至少一个平面相对的对应构件, 推力轴承。 凸缘部分和套筒部分由相互不同组成的铜合金形成。