STAGE APPARATUS SUITABLE FOR A PARTICLE BEAM APPARATUS

    公开(公告)号:US20220028648A1

    公开(公告)日:2022-01-27

    申请号:US17497761

    申请日:2021-10-08

    IPC分类号: H01J37/20 H01J37/26 H01J37/28

    摘要: A stage apparatus for a particle-beam apparatus is disclosed. A particle beam apparatus may comprise a conductive object and an object table, the object table being configured to support an object. The object table comprises a table body and a conductive coating, the conductive coating being provided on at least a portion of a surface of the table body. The conductive object is disposed proximate to the conductive coating and the table body is provided with a feature proximate to an edge portion of the conductive coating. Said feature is arranged so as to reduce an electric field strength in the vicinity of the edge portion of the conductive coating when a voltage is applied to both the conductive object and the conductive coating.

    ENCODER, POSITION MEASUREMENT SYSTEM AND LITHOGRAPHIC APPARATUS

    公开(公告)号:US20170343390A1

    公开(公告)日:2017-11-30

    申请号:US15524263

    申请日:2015-10-22

    摘要: An encoder includes an optical component and an enclosing device having a first surface portion and a second surface portion. The first surface portion is arranged to receive from an ambient environment a first radiation beam. The second surface portion is arranged to receive from the ambient environment a second radiation beam. The optical component is arranged to combine the first and second radiation beams. The enclosing device is arranged to propagate the first radiation beam along a first path. The first path is between the first surface portion and the optical component. The enclosing device is arranged to propagate the second radiation beam along a second path. The second path is between the second surface portion and the optical component. The enclosing device is arranged to enclose a space, so as to isolate the first path and the second path from the ambient environment.