BEVEL ETCH PROFILE CONTROL
    4.
    发明申请

    公开(公告)号:US20190214249A1

    公开(公告)日:2019-07-11

    申请号:US16352518

    申请日:2019-03-13

    Abstract: Methods for processing a substrate, such as bevel etch processing, are provided. In one embodiment, a method includes placing a substrate on a cover plate inside of a processing chamber, where the substrate has a center and a bevel edge and contains a dielectric layer thereon, the processing chamber contains a mask disposed above the substrate and an edge ring disposed under the substrate, the edge ring has an annular body, and the cover plate is disposed on a support assembly. The method further includes heating the substrate with a heater attached to the support assembly, raising the edge ring to contact the mask, flowing a process gas containing an etchant along an outer surface of the mask and to the bevel edge, where the process gas is ignited to produce a plasma, and exposing an upper surface of the substrate at the bevel edge to the process gas.

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