Semiconductor memory devices
    1.
    发明授权

    公开(公告)号:US10263006B2

    公开(公告)日:2019-04-16

    申请号:US15480983

    申请日:2017-04-06

    Abstract: A semiconductor memory device may include: a stacking structure including a plurality of insulating layers and a plurality of gate electrodes alternately stacked on a substrate; a lower semiconductor pattern that protrudes from the top of the substrate; a vertical insulating pattern that extends in a vertical direction from the substrate and penetrates the stacking structure; and a vertical channel pattern on the inner surface of the vertical insulating pattern and contacting the lower semiconductor pattern, wherein an upper part of the lower semiconductor pattern includes a recess region including a curve-shaped profile, and in the recess region, the outer surface of a lower part of the vertical channel pattern contacts the lower semiconductor pattern along a curve of the recess region.

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