Memory arrays, ferroelectric transistors, and methods of reading and writing relative to memory cells of memory arrays

    公开(公告)号:US12223994B2

    公开(公告)日:2025-02-11

    申请号:US18606333

    申请日:2024-03-15

    Abstract: Some embodiments include a ferroelectric transistor. The transistor has gate dielectric material configured as a first container, with the first container having a first inner surface. Metal-containing material is configured as a second container nested within said first container. The second container has a second inner surface with an area less than the first inner surface. Ferroelectric material is configured as a third container nested within the second container. The third container has a third inner surface with an area less than the second inner surface. Gate material is within the third container. Some embodiments include memory arrays having ferroelectric transistors as memory cells. Some embodiments include methods of writing/reading relative to memory cells of memory arrays when the memory cells are metal-ferroelectric-metal-insulator-semiconductor (MFMIS) transistors.

    NONVOLATILE MEMORY DEVICE AND PROGRAM METHOD OF THE SAME

    公开(公告)号:US20250014646A1

    公开(公告)日:2025-01-09

    申请号:US18892390

    申请日:2024-09-21

    Abstract: A program method of a nonvolatile memory device that performs a plurality of program loops is provided. At least one of the plurality of program loops includes dividing a channel of a selected cell string into a first side channel and a second side channel during a first interval and a second interval, turning off a string selection transistor of the selected cell string by applying a string select line voltage of a first level during the first interval, and boosting a first voltage of the first side channel and a second voltage of the second side channel, and turning on the string selection transistor by applying the string select line voltage of a second level different from the first level during the second interval, and performing a hot carrier injection (HCI) program operation on a selected memory cell corresponding to the first side channel or the second side channel.

    Nonvolatile semiconductor memory device and method for manufacturing same

    公开(公告)号:US12193226B2

    公开(公告)日:2025-01-07

    申请号:US18344957

    申请日:2023-06-30

    Inventor: Keiichi Sawa

    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes a plurality of U-shaped memory strings, each of the plurality of U-shaped memory strings including a first columnar body, a second columnar body, and a conductive connection body. The conductive connection body connects the first columnar body and the second columnar body. A plurality of first memory cells are connected in series in the first columnar body and are composed of a plurality of first conductive layers, a first inter-gate insulating film, a plurality of first floating electrodes, a first tunnel insulating film, and a first memory channel layer. The plurality of first floating electrodes are separated from the plurality of first conductive layers by the first inter-gate insulating film. A plurality of second memory cells are connected in series in the second columnar body, similarly to the plurality of first memory cells.

    SUPER FLASH AND METHOD FOR MANUFACTURING SAME

    公开(公告)号:US20240379879A1

    公开(公告)日:2024-11-14

    申请号:US18612961

    申请日:2024-03-21

    Abstract: The present application discloses a super flash, wherein a device cell includes a first gate trench at the top of a source region, a first spacer structure is formed on a side surface of the first gate trench in a self-aligned manner, and the first spacer structure is formed by means of self-aligned etch of a stack layer of a first tunneling dielectric layer, a floating gate, and a second oxide layer. The material of the floating gate comprises a TiN layer. A second spacer structure is formed on a second side surface of the first spacer structure in a self-aligned manner, and the second spacer structure is formed by means of self-aligned etch of a stack layer of a third silicon nitride layer, a fourth oxide layer, and a fifth silicon nitride layer. The present application further discloses a method for manufacturing a super flash.

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