Semiconductor memory devices and methods of manufacturing thereof

    公开(公告)号:US11705177B2

    公开(公告)日:2023-07-18

    申请号:US17470854

    申请日:2021-09-09

    IPC分类号: G11C11/22 H10B51/20

    摘要: A semiconductor device comprises a first conductive structure extending along a vertical direction and a second conductive structure extending along the vertical direction. The second conductive structure is spaced apart from the first conductive structure along a lateral direction. The semiconductor device further comprises a plurality of third conductive structures each extending along the lateral direction. The plurality of third conductive structures are disposed across the first and second conductive structures. The first and second conductive structures each have a varying width along the lateral direction. The plurality of third conductive structures are configured to be applied with respective different voltages in accordance with the varying width of the first and second conductive structures.

    MEMORY DEVICE AND METHOD FOR FABRICATING THE SAME

    公开(公告)号:US20230123764A1

    公开(公告)日:2023-04-20

    申请号:US17591141

    申请日:2022-02-02

    IPC分类号: H01L43/02 H01L27/22 H01L43/12

    摘要: An MRAM cell block and a magnetic shielding structure for the MRAM cell block are incorporated into a metal interconnect of an integrated circuit (IC) device. The magnetic shielding structure may be provided by metallization layers and via layers having wires and vias that incorporate a magnetic shielding material. The magnetic shielding material may form the wires and vias, form a liner around the wires, or may be a layer of the wires. The wires and vias may also include a metal that is more conductive than the magnetic shielding material. The metal interconnect may include layers above or below the magnetic shielding structure that lack the magnetic shielding material and are more conductive. The MRAM cell block with the magnetic shielding structure is optionally provided as a standalone memory device or incorporated into a 3-D IC device that includes a second substrate having a conventional metal interconnect.

    READ CIRCUIT FOR MAGNETIC TUNNEL JUNCTION (MTJ) MEMORY

    公开(公告)号:US20220277782A1

    公开(公告)日:2022-09-01

    申请号:US17748560

    申请日:2022-05-19

    IPC分类号: G11C11/16 H01L27/22 H01L43/02

    摘要: In some embodiments, the present application provides a memory device. The memory device includes a memory cell array comprising a plurality of magnetic tunnel junction (MTJ) memory cells arranged in columns and rows, a read bias circuit connected to the memory cell array and configured to provide a reading bias for a MTJ memory cell of the memory cell array, and a first non-linear resistance device connected in series and between the MTJ memory cell and the read bias circuit. The first non-linear resistance device is configured to provide a first resistance when conducting a first current and a second resistance greater than the first resistance when conducting a second current smaller than the first current.