Area array package with non-electrically connected solder balls
    2.
    发明授权
    Area array package with non-electrically connected solder balls 有权
    具有非电气连接焊球的区域阵列封装

    公开(公告)号:US06762495B1

    公开(公告)日:2004-07-13

    申请号:US10393666

    申请日:2003-03-20

    IPC分类号: H01L2348

    摘要: An area area package includes a plurality of solder balls not used as electrical connectors. These non-connected solder balls, or “dummy balls,” provide protection to solder balls connected to live pins and therefore increase reliability of the area array package. The dummy balls may be placed in the corners, along the diagonals or in other high stress location on the area array package. To further increase reliability, a continuous copper ball land pad may be used to connect each group of corner dummy balls. Continuous copper pads help to reduce stress on the dummy balls. For center-depopulated BGA packages, an array of dummy balls may be used in the center of the package to prevent substrate bending and improve drop test reliability.

    摘要翻译: 区域封装包括不用作电连接器的多个焊球。 这些非连接的焊球或“虚拟球”为连接到活针的焊球提供保护,因此增加了区域阵列封装的可靠性。 虚拟球可以沿着对角线或在区域阵列包装上的其他高应力位置放置在拐角处。 为了进一步提高可靠性,可以使用连续的铜球焊盘来连接每组角落假球。 连续铜垫有助于减轻虚拟球的压力。 对于中心放电的BGA封装,可以在封装的中心使用一组虚拟球,以防止基板弯曲并提高跌落测试的可靠性。

    Asymmetric Front/Back Solder Mask
    8.
    发明申请
    Asymmetric Front/Back Solder Mask 审中-公开
    不对称前/后焊接面罩

    公开(公告)号:US20110195223A1

    公开(公告)日:2011-08-11

    申请号:US12703821

    申请日:2010-02-11

    IPC分类号: B32B3/24 B05D5/00

    摘要: A substrate including a die side interconnect pattern having a first solder mask thickness, and a board side interconnect pattern having a second solder mask thickness, where the second thickness is greater than the first thickness. Fabrication process using dry film solder mask can apply a first laminate thickness forming a die side solder mask, and a second laminate thickness forming a board side solder mask; the second thickness being greater than the first thickness. Fabrication process using a liquid solder resist can apply a first number of passes of solder resist forming a die side solder mask, and a second number of passes of solder resist forming a board side solder mask, where the board side thickness is greater than the die side thickness.

    摘要翻译: 包括具有第一焊料掩模厚度的管芯侧互连图案的衬底和具有第二焊料掩模厚度的板侧互连图案,其中第二厚度大于第一厚度。 使用干膜焊接掩模的制造工艺可以应用形成裸片侧焊料掩模的第一层压厚度和形成板侧焊料掩模的第二层压体厚度; 第二厚度大于第一厚度。 使用液体阻焊剂的制造工艺可以应用形成管芯侧焊料掩模的阻焊剂的第一数量通路,以及形成板侧焊料掩模的第二数量的阻焊剂,其中板侧厚度大于管芯 侧厚。