SUBSTRATE HOLDER, CARRIER SYSTEM COMPRISING A SUBSTRATE HOLDER AND LITHOGRAPHIC APPARATUS

    公开(公告)号:US20230333488A1

    公开(公告)日:2023-10-19

    申请号:US18027094

    申请日:2021-08-20

    IPC分类号: G03F7/20

    CPC分类号: G03F7/70716

    摘要: A substrate holder to hold a substrate in a substrate holding position, the substrate holder including: a frame, multiple surface clamping devices arranged on the frame to clamp a substrate at an upper surface thereof, wherein the surface clamping devices each have a clamping pad to be arranged on the upper surface of the substrate, the surface clamping pads being movable with respect to each other at least in a first direction substantially perpendicular to the upper surface of a substrate held by the surface clamping pads, and one or more actuators to move the surface clamping pads with respect to each other in the first direction.

    APPARATUS AND METHOD FOR MEASURING SUBSTRATE HEIGHT

    公开(公告)号:US20220244651A1

    公开(公告)日:2022-08-04

    申请号:US17625466

    申请日:2020-06-15

    IPC分类号: G03F9/00 G03F7/20

    摘要: An apparatus for measuring a height of a substrate for processing in a lithographic apparatus is disclosed. The apparatus comprises a first sensor for sensing a height of the substrate over a first area. The apparatus also comprises a second sensor for sensing a height of the substrate over a second area. The apparatus further comprises a processor adapted to normalize first data corresponding to a signal from the first sensor with a second sensor footprint to produce a first normalized height data, and to normalize second data corresponding to a signal from the second sensor with a first sensor footprint to produce a second normalized height data. The processor is adapted to determine a correction to a measured height of the substrate based on a difference between the first and second normalized height data.