Solder ball attachment machine for semiconductor packages
    3.
    发明授权
    Solder ball attachment machine for semiconductor packages 失效
    半导体封装焊球附件机

    公开(公告)号:US5620927A

    公开(公告)日:1997-04-15

    申请号:US449950

    申请日:1995-05-25

    Applicant: Shaw W. Lee

    Inventor: Shaw W. Lee

    Abstract: A method and apparatus of attaching solder balls for semiconductor packages is disclosed herein. In a first embodiment, a stencil, having a hole array that matches with a solder ball array on a substrate, is fitted into stencil holder which is inserted the housing of the attachment apparatus. A prefluxed molded substrate strip is inserted into the main station directly above the stencil in the holder. A multiplicity of preformed solder balls are rolled from a reservoir across the stencil hole array thereby filling each of the holes. Vacuum may be used with a modified stencil design to assist in drawing the balls in the holes. An operator or pattern recognition camera may be employed to detect any missing solder balls where corrective action can be immediately taken. After the solder balls have been properly positioned relative to the substrate strip, the solder may be reflowed to attach the balls to the substrate. The described apparatus is relative inexpensive and flexible enough to accommodate various substrate sizes and types of packages.

    Abstract translation: 本文公开了一种用于安装半导体封装的焊球的方法和装置。 在第一实施例中,具有与衬底上的焊球阵列相匹配的孔阵列的模版被装配到插入附接装置的壳体的模板保持器中。 将预先焊接的模制衬底条带直接插入到支架中的模板正上方的主站中。 许多预成形的焊球从容器穿过模板孔阵列滚动,从而填充每个孔。 真空可以与改进的模板设计一起使用以帮助将球画在孔中。 可以使用操作者或模式识别摄像机来检测任何丢失的焊球,其中可以立即采取校正动作。 在焊球相对于衬底条被适当地定位之后,焊料可以被回流以将球附接到衬底。 所描述的装置相对便宜且足够灵活以适应各种基板尺寸和类型的包装。

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