Patterning Methods for Semiconductor Devices

    公开(公告)号:US20210134656A1

    公开(公告)日:2021-05-06

    申请号:US17119692

    申请日:2020-12-11

    Abstract: Semiconductor devices and methods of forming semiconductor devices are provided. A method includes forming a first mask layer over an underlying layer, patterning the first mask layer to form a first opening, forming a non-conformal film over the first mask layer, wherein a first thickness of the non-conformal film formed on the top surface of the first mask layer is greater than a second thickness of the non-conformal film formed on a sidewall surface of the first mask layer, performing a descum process, wherein the descum process removes a portion of the non-conformal film within the first opening, and etching the underlying layer using the patterned first mask layer and remaining portions of the non-conformal film as an etching mask.

    Seamless gap fill
    68.
    发明授权
    Seamless gap fill 审中-公开

    公开(公告)号:US10672866B2

    公开(公告)日:2020-06-02

    申请号:US16043244

    申请日:2018-07-24

    Abstract: A method includes depositing a first dielectric layer in an opening, the first dielectric layer comprising a semiconductor element and a non-semiconductor element. The method further includes depositing a semiconductor layer on the first dielectric layer, the semiconductor layer comprising a first element that is the same as the semiconductor element. The method further includes introducing a second element to the semiconductor layer wherein the second element is the same as the non-semiconductor element. The method further includes applying a thermal annealing process to the semiconductor layer to change the semiconductor layer into a second dielectric layer.

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