Memory array staircase structure
    142.
    发明授权

    公开(公告)号:US12148505B2

    公开(公告)日:2024-11-19

    申请号:US18362685

    申请日:2023-07-31

    Abstract: Routing arrangements for 3D memory arrays and methods of forming the same are disclosed. In an embodiment, a memory array includes a first word line extending from a first edge of the memory array in a first direction, the first word line having a length less than a length of a second edge of the memory array perpendicular to the first edge of the memory array; a second word line extending from a third edge of the memory array opposite the first edge of the memory array, the second word line extending in the first direction, the second word line having a length less than the length of the second edge of the memory array; a memory film contacting the first word line; and an OS layer contacting a first source line and a first bit line, the memory film being disposed between the OS layer and the first word line.

    High selectivity isolation structure for improving effectiveness of 3D memory fabrication

    公开(公告)号:US11723210B2

    公开(公告)日:2023-08-08

    申请号:US17333300

    申请日:2021-05-28

    CPC classification number: H10B51/20 H10B51/30

    Abstract: In some embodiments, the present disclosure relates to a method for forming a memory device, including forming a plurality of word line stacks respectively including a plurality of word lines alternatingly stacked with a plurality of insulating layers over a semiconductor substrate, forming a data storage layer along opposing sidewalls of the word line stacks, forming a channel layer along opposing sidewalls of the data storage layer, forming an inner insulating layer between inner sidewalls of the channel layer and including a first dielectric material, performing an isolation cut process including a first etching process through the inner insulating layer and the channel layer to form an isolation opening, forming an isolation structure filling the isolation opening and including a second dielectric material, performing a second etching process through the inner insulating layer on opposing sides of the isolation structure to form source/drain openings, and forming source/drain contacts in the source/drain openings.

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