Memory device
    62.
    发明授权

    公开(公告)号:US09673389B2

    公开(公告)日:2017-06-06

    申请号:US13357149

    申请日:2012-01-24

    申请人: Kenichi Murooka

    发明人: Kenichi Murooka

    IPC分类号: H01L27/24 H01L45/00

    摘要: According to one embodiment, a memory device includes a first interconnect group, a second interconnect group, and a memory cell. In the first interconnect group, first interconnects are stacked. The first interconnect group includes first regions in which the first interconnects are formed along a first direction, and a second region in which first contact plugs are formed on the first interconnects. In the second region, the first interconnect group includes a step portion. Heights of adjacent terraces of the step portion are different from each other by the two or more first interconnects.