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Lithographic apparatus and device manufacturing method

  • US 7,880,860 B2
  • Filed: 12/20/2004
  • Issued: 02/01/2011
  • Est. Priority Date: 12/20/2004
  • Status: Active Grant
First Claim
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1. A lithographic apparatus, comprising:

  • a substrate table configured to hold a substrate;

    a projection system configured to project a patterned beam of radiation onto the substrate, the projection system comprising a final optical element adjacent the substrate;

    a liquid supply system having an immersion liquid outlet configured to provide an immersion liquid to a space between the projection system and the substrate table for projection of the patterned beam; and

    a cleaning device configured to clean the final optical element, the substrate table, or both, the cleaning device comprising;

    a liquid confinement structure of the liquid supply system, the liquid confinement structure configured to partially'"'"'confine immersion liquid in the space during a projection of the patterned beam onto the substrate and to partially confine a cleaning fluid in the space during a cleaning using the cleaning device; and

    a cleaning fluid outlet, different from the immersion liquid outlet, to supply cleaning fluid to the space for cleaning,wherein the immersion liquid flow through the immersion liquid outlet does not share a flow path with cleaning fluid flow through the cleaning fluid outlet immediately before supply of immersion liquid or cleaning fluid to the space.

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