WAFER EDGE ASYMMETRY CORRECTION USING GROOVE IN POLISHING PAD

    公开(公告)号:US20240075583A1

    公开(公告)日:2024-03-07

    申请号:US18505871

    申请日:2023-11-09

    CPC classification number: B24B37/26 B24B37/005 B24B37/042 B24B37/27

    Abstract: A chemical mechanical polishing system includes a platen to hold a polishing pad, a carrier head to hold a substrate against a polishing surface of the polishing pad, and a controller. The polishing pad has a polishing control groove. The carrier is laterally movable by a first actuator across the polishing pad and rotatable by a second actuator. The controller synchronizes lateral oscillation of the carrier head with rotation of the carrier head such that over a plurality of successive oscillations of the carrier head such that when a first angular swath of an edge portion of the substrate is at an azimuthal angular position about an axis of rotation of the carrier head the first angular swath overlies the polishing surface and when a second angular swath of the edge portion of the substrate is at the azimuthal angular position the second angular swath overlies the polishing control groove.

    Conditioning of grooving in polishing pads
    40.
    发明授权
    Conditioning of grooving in polishing pads 有权
    调理抛光垫中的切槽

    公开(公告)号:US09486893B2

    公开(公告)日:2016-11-08

    申请号:US14285545

    申请日:2014-05-22

    CPC classification number: B24B53/017 B23K26/36 B24B37/26 B26D3/06 B26F3/004

    Abstract: Among other things, a method comprises polishing a surface of a substrate by applying a pressure between the surface of a substrate and a surface of a polishing pad. The surface of the polishing pad defines one or more grooves separated by one or more partition regions. The one or more grooves have an initial depth before the polishing starts and extend from an initial outer surface of the one or more partition regions to an initial bottom of the one or more grooves. The method also comprises removing material below an initial bottom of the one or more grooves such that a distance between an outer surface of the one or more partition regions and a bottom of the one or more grooves remain substantially the same as the initial depth.

    Abstract translation: 除其他之外,一种方法包括通过在基板的表面和抛光垫的表面之间施加压力来抛光基板的表面。 抛光垫的表面限定了一个或多个由一个或多个分隔区隔开的槽。 一个或多个凹槽在抛光开始之前具有初始深度并且从一个或多个分隔区域的初始外表面延伸到一个或多个凹槽的初始底部。 该方法还包括在一个或多个凹槽的初始底部下方移除材料,使得一个或多个分隔区域的外表面与一个或多个凹槽的底部之间的距离保持与初始深度基本相同。

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