Use of tapered head pin design to improve the stress distribution in the
braze joint
    5.
    发明授权
    Use of tapered head pin design to improve the stress distribution in the braze joint 失效
    采用锥形头针设计,提高钎焊接头的应力分布

    公开(公告)号:US4970570A

    公开(公告)日:1990-11-13

    申请号:US423613

    申请日:1989-10-16

    IPC分类号: H01L21/48 H01L23/498 H05K3/34

    摘要: The present invention teaches a structure for reducing the stresses created on a substrate and on the bonding surface at which a connector is attached. The connector has a tapered or beveled head thereby tapering the stress away from the edges of the bonding surface and therefore away from the high stress areas of the substrate, preventing cracking and delamination problems that might otherwise result. The tapered-head geometry also allows greater flexibility in manufacturing the connectors particularly when fabricating pins using a cold-heading process in that a quarter shank diameter:pin head diameter ratio can be obtained.

    摘要翻译: 本发明教导了一种用于减少在基板上以及在连接器所在的接合表面上产生的应力的结构。 连接器具有锥形或倾斜的头部,从而使应力使结合表面的边缘远离并且因此远离基板的高应力区域,从而防止否则可能导致的开裂和分层问题。 锥形头几何形状还允许制造连接器时的更大的灵活性,特别是当使用冷镦工艺制造销时,因为可以获得四分之一直径:销头直径比。