Semiconductor device and method of forming the same

    公开(公告)号:US12080782B2

    公开(公告)日:2024-09-03

    申请号:US18201868

    申请日:2023-05-25

    Inventor: Jun Noh Lee

    Abstract: A method of forming a semiconductor device includes forming, on a lower structure, a mold structure having interlayer insulating layers and gate layers alternately and repeatedly stacked. Each of the gate layers is formed of a first layer, a second layer, and a third layer sequentially stacked. The first and third layers include a first material, and the second layer includes a second material having an etch selectivity different from an etch selectivity of the first material. A hole formed to pass through the mold structure exposes side surfaces of the interlayer insulating layers and side surfaces of the gate layers. Gate layers exposed by the hole are etched, with an etching speed of the second material differing from an etching speed of the first material, to create recessed regions.

    INTEGRATED CIRCUIT DEVICE
    6.
    发明公开

    公开(公告)号:US20240096796A1

    公开(公告)日:2024-03-21

    申请号:US18219244

    申请日:2023-07-07

    Abstract: An integrated circuit device includes a plurality of wiring structures on a substrate and extending in a first direction parallel to an upper surface of the substrate and each including a wiring layer on the substrate and extending in a direction perpendicular to the upper surface of the substrate; an insulating pattern surrounding a sidewall of the wiring layer and including a first insulating material; and a capping layer on an upper surface of the wiring layer and including a conductive material; a via layer on the wiring structures, the via layer being electrically connected to one wiring structure; and an interlayer insulating layer covering a sidewall of the insulating pattern between each wiring structure of the plurality of wiring structures, the interlayer insulating layer having an upper surface higher than an upper surface of each wiring layer and an upper surface of each insulating pattern.

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