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Lithographic apparatus and device manufacturing method

  • US 7,795,603 B2
  • Filed: 12/19/2008
  • Issued: 09/14/2010
  • Est. Priority Date: 11/12/2002
  • Status: Active Grant
First Claim
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1. A method of patterning a substrate, the method comprising:

  • measuring at a measurement station a height, a tilt, or both, of each of a plurality of points on the substrate, wherein the measuring is not performed through liquid adjacent to the substrate;

    moving the substrate from the measurement station to an exposure station;

    providing a liquid at the exposure station in a space between a projection system and the substrate;

    moving one or more of the plurality of points to a focal point of the projection system based on the measuring; and

    projecting a patterned beam through the liquid onto a target portion of the substrate.

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