Semiconductor memory device
    1.
    发明授权

    公开(公告)号:US12020753B2

    公开(公告)日:2024-06-25

    申请号:US18359764

    申请日:2023-07-26

    Inventor: Naoya Tokiwa

    Abstract: A semiconductor memory device includes a memory block, a plurality of bit lines, a plurality of select gate lines, a plurality of word lines, and a controller. The memory block includes a plurality of memory strings, each memory string including a selection transistor and a plurality of memory cells. The plurality of bit lines are arranged in the first direction and connected to the respective memory strings. The plurality of select gate lines are arranged in the second direction and connected to gates of the respective selection transistors of the memory strings. The plurality of word lines are arranged in the third direction and connected to gates of the respective memory cells of the memory strings. The controller is configured to perform an erase operation in a unit of the memory block, and perform a sequence of erase verify operations.

    3D and flash memory device and method of fabricating the same

    公开(公告)号:US11903203B2

    公开(公告)日:2024-02-13

    申请号:US17461518

    申请日:2021-08-30

    CPC classification number: H10B43/27 H10B43/10 G11C16/0466

    Abstract: A 3D AND flash memory device includes a gate stack structure, a channel pillar, a first and a second conductive pillars, a charge storage structure, and a protective cap. The gate stack structure is disposed on a dielectric substrate and includes gate layers and insulating layers alternately stacked with each other. The channel pillar penetrates through the gate stack structure. The first and the second conductive pillars are disposed in the channel pillar and penetrate through the gate stack structure, and the first and the second conductive pillars are separated from each other and each connected to the channel pillar. The charge storage structure is disposed between the gate layers and a sidewall of the channel pillar. The protective cap covers at least a top surface of the channel pillar and isolates the first conductive pillar and the second conductive pillar from a top gate layer of the gate layers.

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