Method and structure for prevention leakage of substrate strip
    8.
    发明授权
    Method and structure for prevention leakage of substrate strip 有权
    衬底条防止泄漏的方法和结构

    公开(公告)号:US07091583B2

    公开(公告)日:2006-08-15

    申请号:US10933349

    申请日:2004-09-03

    IPC分类号: H01L23/02

    摘要: The present invention provides a structure and a method for prevention leakage of a substrate strip. The substrate strip includes an edge portion and a plurality of units. A patterned metal layer on a surface of the substrate strip includes at least one plating bus extended to the edge portion, a plurality of plating lines at the units, a plurality of contact pads at the units and a plurality of fiducial marks at the edge portion. The plating bus has an extended trail having one end exposed out of the sidewall of the substrate strip. The fiducial marks and the contact pads are exposed out of a plurality of first openings of a solder mask. The solder mask also has a second opening at the edge portion exposing a portion of the plating bus to define a breaking hole. After forming a surface layer on the fiducial marks and the contact pads, the exposed portion of the plating bus is void of the surface layer. By removing the exposed portion of the plating bus, the breaking hole is formed to electrically isolate the extended trail from the contact pads in order to prevent a chip on the substrate strip from being damaged by ESD (Electrostatic Discharge) during packaging processes.

    摘要翻译: 本发明提供了一种用于防止衬底条的泄漏的结构和方法。 衬底条包括边缘部分和多个单元。 衬底条表面上的图案化金属层包括延伸到边缘部分的至少一个电镀母线,在该单元处的多条电镀线,在该单元处的多个接触焊盘和在边缘部分处的多个基准标记 。 电镀母线具有一个伸出的线,其一端暴露在衬底带的侧壁外。 基准标记和接触垫从焊料掩模的多个第一开口露出。 焊接掩模还在边缘部分处具有暴露电镀总线的一部分以限定断裂孔的第二开口。 在基准标记和接触焊盘上形成表面层之后,电镀总线的露出部分没有表面层。 通过去除电镀总线的暴露部分,形成断开孔以将延伸的迹线与接触焊盘电隔离,以防止在封装过程中ESD(静电放电)在衬底条上的芯片被损坏。