Patent ID: 9639008
Date: 2017-05-02
CPC Classifications: G03F

Claim:
1. A lithography apparatus that patterns a substrate, the apparatus comprising: a substrate holder configured to hold the substrate and be movable; a measuring station that includes a first measuring device including a first reference member and configured to measure a height of the substrate holder via the first reference member, the measured height by the first measuring device being used to position the substrate holder relative to the measuring station, and a second measuring device configured to measure a height of a surface of the substrate held by the substrate holder; a patterning station that includes a third measuring device including a second reference member and configured to measure a height of the substrate holder via the second reference member, the measured height by the third measuring device being used to position the substrate holder relative to the patterning station, and patterns the substrate held by the substrate holder based on an output of the second measuring device; and a controller, wherein the patterning station includes a fourth measuring device configured to measure a height of the surface of the substrate held by the substrate holder, and the controller is configured to obtain a correction value for compensating for a difference between a shape of the first reference member and a shape of the second reference member and for correcting an output obtained from at least one of the first measuring device and the third measuring device based on an output of the second measuring device and an output of the fourth measuring device with respect to a substrate held by the substrate holder to compensate for the difference using the correction value to position the substrate holder.