CRACK STOP RING TRENCH TO PREVENT EPITAXY CRACK PROPAGATION

    公开(公告)号:US20220375875A1

    公开(公告)日:2022-11-24

    申请号:US17391341

    申请日:2021-08-02

    Abstract: In some embodiments, the present disclosure relates to a semiconductor structure. The semiconductor structure includes a stacked semiconductor substrate having a semiconductor material disposed over a base semiconductor substrate. The base semiconductor substrate has a first coefficient of thermal expansion and the semiconductor material has a second coefficient of thermal expansion that is different than the first coefficient of thermal expansion. The stacked semiconductor substrate includes one or more sidewalls defining a crack stop ring trench that continuously extends in a closed path between a central region of the stacked semiconductor substrate and a peripheral region of the stacked semiconductor substrate surrounding the central region. The peripheral region of the stacked semiconductor substrate includes a plurality of cracks and the central region is substantially devoid of cracks.

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