AIR GAPS IN MEMORY ARRAY STRUCTURES

    公开(公告)号:US20240404875A1

    公开(公告)日:2024-12-05

    申请号:US18770730

    申请日:2024-07-12

    Abstract: A memory device includes first transistor over a semiconductor substrate, wherein the first transistor includes a first word line extending over the semiconductor substrate; a second transistor over the semiconductor substrate, wherein the second transistor includes a second word line extending over the first word line; a first air gap extending between the first word line and the second word line; a memory film extending along and contacting the first word line and the second word line; a channel layer extending along the memory film; a source line extending along the channel layer, wherein the memory film is between the source line and the word line; a bit line extending along the channel layer, wherein the memory film is between the bit line and the word line; and an isolation region between the source line and the bit line.

    Three-dimensional memory device and method

    公开(公告)号:US12027412B2

    公开(公告)日:2024-07-02

    申请号:US17814626

    申请日:2022-07-25

    CPC classification number: H01L21/76237 G11C7/18 H10B51/20 H10B99/00

    Abstract: A method of forming a three-dimensional (3D) memory device includes: forming a layer stack over a substrate, the layer stack including alternating layers of a first dielectric material and a second dielectric material; forming trenches extending through the layer stack; replacing the second dielectric material with an electrically conductive material to form word lines (WLs); lining sidewalls and bottoms of the trenches with a ferroelectric material; filling the trenches with a third dielectric material; forming bit lines (BLs) and source lines (SLs) extending vertically through the third dielectric material; removing portions of the third dielectric material to form openings in the third dielectric material between the BLs and the SLs; forming a channel material along sidewalls of the openings; and filling the openings with a fourth dielectric material.

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