Method for forming memory device
    113.
    发明授权

    公开(公告)号:US11638379B2

    公开(公告)日:2023-04-25

    申请号:US17511829

    申请日:2021-10-27

    摘要: A method for forming a memory device is provided. The memory device includes a substrate; a stack including a plurality of conductive layers and a plurality of insulating layers being alternatively stacked on the substrate; a plurality of memory structures formed on the substrate and penetrating the stack; a plurality of isolation structures formed on the substrate and penetrating the stack, wherein the isolation structures dividing the memory structures into a plurality of first memory structures and a plurality of second memory structures; and a plurality of common source pillars formed on the substrate and penetrating the stack, wherein the common source pillars directly contact the isolation structures.

    THREE-DIMENSIONAL MEMORY DEVICE AND METHOD FOR MANUFACTURING THREE-DIMENSIONAL MEMORY DEVICE

    公开(公告)号:US20230114522A1

    公开(公告)日:2023-04-13

    申请号:US18079827

    申请日:2022-12-12

    发明人: Zhaohui Tang

    摘要: A three-dimensional memory device and a method for manufacturing the same are provided. The method includes steps as follows. A semiconductor structure including a substrate and a stacked structure on the substrate is provided. The stacked structure includes alternately stacked gate layers and dielectric layers, or alternately stacked dummy gate layers and dielectric layers. The dummy gate layers are replaceable by the gate layers. A groove is formed in a gate line slit region of the stacked structure. The groove penetrates through the gate layers and multiple layers of the dielectric layers, or through the dummy gate layers and multiple layers of the dielectric layers. An insulating layer is formed on a surface of the stacked structure and in the groove. A depression is formed on a surface of the insulating layer above the groove away from the substrate. The insulating layer is polished to flatten the depression.

    SEMICONDUCTOR MEMORY DEVICE
    117.
    发明公开

    公开(公告)号:US20240357810A1

    公开(公告)日:2024-10-24

    申请号:US18757708

    申请日:2024-06-28

    IPC分类号: H10B43/20 H10B43/10

    CPC分类号: H10B43/20 H10B43/10

    摘要: A semiconductor memory device having improved electrical characteristics is provided. The semiconductor memory device comprises a first semiconductor pattern separated from a substrate in a first direction, a first gate structure extending in the first direction and penetrating the first semiconductor pattern, a first conductive connecting line connected to the first semiconductor pattern and extending in a second direction different from the first direction, and a second conductive connecting line connected to the first semiconductor pattern. The first gate structure is between the first conductive connecting line and the second conductive connecting line, the first gate structure includes a first gate electrode and a first gate insulating film, and the first gate insulating film includes a first charge holding film contacting with the first semiconductor pattern.