LOW RESISTANCE PULSED CVD TUNGSTEN
    1.
    发明申请

    公开(公告)号:WO2022108908A1

    公开(公告)日:2022-05-27

    申请号:PCT/US2021/059473

    申请日:2021-11-16

    Abstract: Provided herein are methods of depositing tungsten (W) films without depositing a nucleation layer. In certain embodiments, the methods involve depositing a conformal layer of boron (B) on a substrate. The substrate generally includes a feature to be filled with tungsten with the boron layer conformal to the topography of the substrate including the feature. The reducing agent layer is then exposed to a continuous flow of hydrogen and pulses of fluorine-containing tungsten precursor in a pulsed CVD process. The conformal boron layer is converted to a conformal tungsten layer.

    ATOMIC LAYER DEPOSITION ON 3D NAND STRUCTURES

    公开(公告)号:WO2020123987A1

    公开(公告)日:2020-06-18

    申请号:PCT/US2019/066301

    申请日:2019-12-13

    Abstract: Methods and apparatuses are described that provide tungsten deposition with low roughness. In some embodiments, the methods involve co-flowing nitrogen with hydrogen during an atomic layer deposition process of depositing tungsten that uses hydrogen as a reducing agent. In some embodiments, the methods involve depositing a cap layer, such as tungsten oxide or amorphous tungsten layer, on a sidewall surface of a 3D NAND structure. The disclosed embodiments have a wide variety of applications including depositing tungsten into 3D NAND structures.

    REDUCTION OF DIFFUSION ACROSS FILM INTERFACES

    公开(公告)号:WO2019236909A1

    公开(公告)日:2019-12-12

    申请号:PCT/US2019/035875

    申请日:2019-06-06

    Abstract: Provided are methods of treating a substrate surface to reduce diffusion of species that may be generated or provided in a subsequent operation. The substrate surface may be, for example, an oxide surface or a metal or metal compound film and may be a surface of a blanket film or of a liner film in a topographical feature according to various embodiments. Examples of treating the surface can include exposure to one or more chemical species and/or a thermal anneal. In some embodiments, the treatment increases the roughness of the grain boundary of the film surface. This can reduce the space available for diffusion and increase the tortuosity of diffusion paths through the film. In some embodiments, the treatment may involve forming compound molecules, for example, oxidation of a metal-containing film to form an oxide. The treated surface is less susceptible to diffusion of species such as halogen species.

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