PELLICLES AND MEMBRANES FOR USE IN A LITHOGRAPHIC APPARATUS

    公开(公告)号:US20250013142A1

    公开(公告)日:2025-01-09

    申请号:US18708573

    申请日:2022-11-11

    Abstract: A method for forming a pellicle for use in a lithographic apparatus is disclosed. The method includes: providing a porous membrane formed from a first material; applying at least one layer of two-dimensional material to at least one side of the porous membrane; and applying a capping layer to the at least one layer of two-dimensional material on at least one side of the porous membrane such that the at least one layer of two-dimensional material is disposed between the or each capping layer and the porous membrane. The at least one layer of two-dimensional material may act to close the adjacent side of the porous membrane and to form a smoother and flatter exterior surface of the pellicle. Advantageously, this may allow the porous membrane to be protected from etching while reducing EUV flare, regardless of the material used for the capping layer.

    PELLICLES AND MEMBRANES FOR USE IN A LITHOGRAPHIC APPARATUS

    公开(公告)号:US20250147440A1

    公开(公告)日:2025-05-08

    申请号:US18835714

    申请日:2023-01-10

    Abstract: Novel membranes for use in a lithographic apparatus are disclosed. A first membrane includes a core substrate and a metal silicate layer. The metal silicate layer is an outermost layer of the first membrane. A second membrane includes a core substrate and an yttrium silicate layer. The yttrium silicate layer may be an outermost layer of the membrane or, alternatively, the yttrium silicate layer may be disposed between the core substrate and a layer of yttrium or yttrium oxide. The first and second membranes may be provided within an EUV lithographic apparatus. For example, the membranes may form part of a pellicle. The pellicle may be suitable for use adjacent to a reticle within an EUV lithographic apparatus. The membranes may form part of a dynamic gas lock. The membranes may form part of a spectral filter.

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