GAS INJECTION SYSTEMS FOR PARTICLE SUPPRESSION

    公开(公告)号:WO2019020449A1

    公开(公告)日:2019-01-31

    申请号:PCT/EP2018/069474

    申请日:2018-07-18

    Abstract: Designs are provided to reduce the possibility of contaminant particles with a large range of sizes, materials, travel speeds and angles of incidence reaching a particle-sensitive environment. According to an aspect of the disclosure, there is provided an object stage (400) comprising first and second chambers (403; 405). The object stage further comprises a first structure (402) having a first surface (415) and a second structure (404). The second structure is configured to support an object (412) in the second chamber (405), movable relative to the first structure, and comprises a second surface (417) opposing the first surface (415) of the first structure (402) thereby defining a gap (414) between the first structure and the second structure that extends between the first chamber (403) and the second chamber (405). The object stage further comprises a gas outlet for injecting a gas provided (a) in the gap or (b) in the first chamber adjacent an entrance of the gap at the first chamber.

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