Memory array contact structures
    1.
    发明授权

    公开(公告)号:US12225731B2

    公开(公告)日:2025-02-11

    申请号:US17818638

    申请日:2022-08-09

    Abstract: A memory cell includes a transistor including a memory film extending along a word line; a channel layer extending along the memory film, wherein the memory film is between the channel layer and the word line; a source line extending along the memory film, wherein the memory film is between the source line and the word line; a first contact layer on the source line, wherein the first contact layer contacts the channel layer and the memory film; a bit line extending along the memory film, wherein the memory film is between the bit line and the word line; a second contact layer on the bit line, wherein the second contact layer contacts the channel layer and the memory film; and an isolation region between the source line and the bit line.

    Three-dimensional memory device and method

    公开(公告)号:US12256550B2

    公开(公告)日:2025-03-18

    申请号:US18327439

    申请日:2023-06-01

    Abstract: A memory cell includes patterning a first trench extending through a first conductive line, depositing a memory film along sidewalls and a bottom surface of the first trench, depositing a channel layer over the memory film, the channel layer extending along the sidewalls and the bottom surface of the first trench, depositing a first dielectric layer over and contacting the channel layer to fill the first trench, patterning a first opening, wherein patterning the first opening comprises etching the first dielectric layer, depositing a gate dielectric layer in the first opening, and depositing a gate electrode over the gate dielectric layer and in the first opening, the gate electrode being surrounded by the gate dielectric layer.

    Memory array including epitaxial source lines and bit lines

    公开(公告)号:US11974441B2

    公开(公告)日:2024-04-30

    申请号:US17138152

    申请日:2020-12-30

    CPC classification number: H10B51/20 H01L29/0653 H01L29/0669 H10B51/10

    Abstract: A 3D memory array in which epitaxial source/drain regions which are horizontally merged and vertically unmerged are used as source lines and bit lines and methods of forming the same are disclosed. In an embodiment, a memory array includes a first channel region over a semiconductor substrate; a first epitaxial region electrically coupled to the first channel region; a second epitaxial region directly over the first epitaxial region in a direction perpendicular to a major surface of the semiconductor substrate; a dielectric material between the first epitaxial region and the second epitaxial region, the second epitaxial region being isolated from the first epitaxial region by the dielectric material; a gate dielectric surrounding the first channel region; and a gate electrode surrounding the gate dielectric.

Patent Agency Ranking