Lithographic apparatus and device manufacturing method

    公开(公告)号:US10114295B2

    公开(公告)日:2018-10-30

    申请号:US15520193

    申请日:2015-10-13

    Abstract: A lithographic apparatus including: a projection system to project radiation onto a substrate supported on a substrate stage, during an exposure phase; a sensing system to sense a property of the substrate on the stage during a sensing phase; and a positioning system to determine a position of the stage relative to a reference system via a radiation path between the stage and the reference system, wherein the apparatus is configured to control stage movement relative to the reference system in the sensing phase and to control other movement relative to the reference system during the exposure phase; the stage or reference system having an outlet to provide a gas curtain to reduce ingress of ambient gas into the path; and the apparatus is operative such that a characteristic of the gas curtain is different in at least part of the sensing phase compared to in the exposure phase.

    Lithographic apparatus and device manufacturing method

    公开(公告)号:US10133197B2

    公开(公告)日:2018-11-20

    申请号:US15325987

    申请日:2015-06-08

    Abstract: A lithographic apparatus including: a projection system with an optical axis; an enclosure with an ambient gas; and a physical component accommodated in the enclosure, wherein: the lithographic apparatus is configured to cause the physical component to undergo movement relative to the enclosure, in a predetermined direction and in a plane perpendicular to the optical axis; the lithographic apparatus is configured to let the physical component maintain a predetermined orientation with respect to the enclosure during the movement; the movement induces a flow of the ambient gas relative to the component; the physical component has a surface oriented perpendicularly to the optical axis; the component includes a flow direction system configured to direct the flow of ambient gas away from the surface.

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