SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE SUPPRESSING LEAKAGE CURRENT OF MULTILAYER WIRING STRUCTURES

    公开(公告)号:US20250014998A1

    公开(公告)日:2025-01-09

    申请号:US18897275

    申请日:2024-09-26

    Abstract: A semiconductor integrated circuit device includes a substrate; a transistor on the substrate; an interlayer insulating film on the transistor; an insulating liner on the interlayer insulating film; a first insulating film on the insulating liner; and a first wiring layer on the interlayer insulating film and surrounded by the insulating liner. A height of a top surface of the first insulating film in a vertical direction from a main surface of the interlayer insulating film is different than a height of a top surface of the first wiring layer in the vertical direction. A step exists between the top surfaces of the first wiring layer and the first insulating film. A height of the first insulating film is greater than a height of the first wiring layer. A width of the first wiring layer gradually narrows as the first wiring layer extends upwards along the vertical direction.

    Semiconductor devices
    7.
    发明授权

    公开(公告)号:US11721622B2

    公开(公告)日:2023-08-08

    申请号:US17453197

    申请日:2021-11-02

    CPC classification number: H01L23/5226 H01L23/528 H01L23/53204

    Abstract: A semiconductor device includes a second insulating layer disposed on a substrate and that includes a first trench that extends in a first direction, a first via disposed in the first hole, a first interconnection layer disposed in the first trench on the first via and that has an upwardly upper region, and a third insulating layer disposed on the second insulating layer and that includes a second hole and a second trench connected to the second hole. The first trench has inclined side surfaces such that a width of the first trench increases in a direction toward the substrate, the second hole has inclined side surfaces such that a width of the second hole decreases in the direction toward the substrate, and a lower portion of the second hole is wider than an upper surface of the first interconnection layer.

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