Method and apparatus for preventing the deformation of a substrate supported at its edge area

    公开(公告)号:US10103049B2

    公开(公告)日:2018-10-16

    申请号:US15117930

    申请日:2015-02-11

    发明人: Bernhard Bogner

    摘要: The method and the apparatus prevents the deformation of a substrate, e.g. a wafer, supported with its edge area or periphery at a support or chuck, and also avoids the damage and/or contamination of the active area of the substrate. In particular, the substrate is mechanically supported at its peripheral or edge portion, namely in the non-active area of the substrate, only; an additional non-mechanical extended support is provided in the active area by a gas cushion. The gas cushion is generated by a controllable nozzle or purge for a distinct and controlled compensation of the downward deflection of the substrate.

    Substrate cassette
    3.
    发明授权

    公开(公告)号:US11049746B2

    公开(公告)日:2021-06-29

    申请号:US16704875

    申请日:2019-12-05

    发明人: Bernhard Bogner

    IPC分类号: H01L21/673

    摘要: A substrate cassette for housing several substrates stacked on top of each other, in particular wafers, has a housing that comprises a first side and a second side that is parallel to the first side, wherein at least an elongated first support is provided for a substrate within the housing between the sides, said support being spaced apart at least in sections from the first side, wherein the first side is closest to said at least one first support.