SOLDER FOR ELECTRONIC PART BONDING ELECTRODES, AND SOLDERING METHOD
    121.
    发明公开
    SOLDER FOR ELECTRONIC PART BONDING ELECTRODES, AND SOLDERING METHOD 失效
    LOTFÜRELEKTRODEN ZUM VERBINDEN VON ELEKTRONISCHEN TEILEN UNDLÖTVERFAHREN

    公开(公告)号:EP0858859A1

    公开(公告)日:1998-08-19

    申请号:EP97925301.0

    申请日:1997-06-06

    Abstract: A lead-free solder alloy of electrode for joining electronic parts fine in texture and excellent in thermal fatigue resistant characteristic is presented.
    This is a solder alloy of electrode for joining electronic parts comprising Sn, Ag and Cu as principal components, and more particularly a solder alloy of electrode for joining electronic parts containing 92 to 97 wt.% of Sn, 3.0 to 6.0 wt. % of Ag, and 0.1 to 2.0 wt. % of Cu. By adding a small amount of Ag to the solder mainly composed of Sn, a fine alloy texture is formed, and texture changes are decreased, so that an alloy excellent in thermal fatigue resistance is obtained. Further, by adding a small amount of Cu, an intermetallic compound is formed, and the junction strength is improved.

    Abstract translation: 提出了一种无电极焊接合金,用于连接电子零件质地细腻,耐热疲劳特性优异的电极。 这是用于连接包含Sn,Ag和Cu的电子部件作为主要成分的电极用焊料合金,特别是用于接合含有92〜97重量%的Sn,3.0〜6.0重量%的电子部件的电极用焊料合金。 Ag%,0.1〜2.0wt。 Cu的百分比。 通过向主要由Sn组成的焊料中添加少量Ag,形成微细的合金织构,并且纹理变化减小,从而获得耐热疲劳性优异的合金。 此外,通过添加少量的Cu,形成金属间化合物,结合强度提高。

    Dielectric filter and method of making same
    122.
    发明公开
    Dielectric filter and method of making same 失效
    一种介质滤波器,和处理它的制备

    公开(公告)号:EP0797266A3

    公开(公告)日:1998-07-22

    申请号:EP97301813

    申请日:1997-03-18

    Inventor: ITO KENJI

    Abstract: In a dielectric filter to be mounted on a printed circuit board, a conductive layer (x) formed on the surface of a dielectric substrate (1) includes an electroless copper-plated layer (m) formed on the surface of the substrate, and a conductive covering layer (n) having good dielectric conductivity and good solder wettability and formed on the surface of the electroless copper-plated layer (m). In place of the conductive covering layer (n) or in addition to the conductive covering layer (n), there is provided a protective synthetic resin layer (p) which covers the electroless copper-plated layer (m) or the conductive covering layer (n) and which vanishes upon exposure to heat of molten solder (25). Even when the conductive layer (x) is formed by electroless copper-plating, the conductive layer (x) is free from stain. Moreover, a terminal portion of the conductive layer (x) formed on the surface of the dielectric filter (1) can be soldered to a conductive path formed on a printed circuit board to thereby establish electric connection therebetween.

    Chip capacitor having a compliant termination
    127.
    发明公开
    Chip capacitor having a compliant termination 无效
    具有合规终止的芯片电容器

    公开(公告)号:EP0100175A3

    公开(公告)日:1986-02-05

    申请号:EP83304018

    申请日:1983-07-11

    Abstract: A monolithic capacitor chip (10') comprises a body formed of stacked, alternately arranged layers of dielectric material (16) and metallic electrode material (18'), altemate electrodes extending to opposite end faces of the body, and a noncompliant metalized layer (20', 22') on each of the opposite end faces electrically contacting the electrodes (18') extending thereto. Each of the noncompliant metalized layers (20', 22) is provided with a compliant coating (32,34) of an alloy preferably comprising more than 90 % lead. A metallic layer (36, 38) is disposed over the surface of each of the compliant coatings (32, 34), the melting point of the metallic layers (36, 38) being greater than that of the compliant coating (32, 34). The metallic layer (36, 38) preferably consists of a layer of copper or nickel plating, the surface of which is plated with an oxidation resistant metal such as tin, gold, or the like.

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