Patent ID: 8248584
Filing Date: 2012-08-21
Classification: G03B,G03F

Abstract:
1. An exposure apparatus which exposes a substrate to radiant energy, the apparatus comprising: a grouping unit configured to divide a plurality of substrates into a plurality of groups based on measurements of the plurality of substrates, and determine a reference substrate and a non-reference substrate for each of the plurality of groups; a measurement unit configured to measure a first number of measurement points for the reference substrate, and measure a second number of measurement points for the non-reference substrate, the second number being smaller than the first number; a correction value determining unit configured to determine a first correction value to position the reference substrate, and a second correction value to position the non-reference substrate; and an exposure unit configured to expose the reference substrate to radiant energy by positioning the reference substrate based on the first correction value, and expose the non-reference substrate to radiant energy by positioning the non-reference substrate based on the second correction value, wherein the correction value determining unit is configured to determine the first correction value for each of the plurality of groups based on measurement for the reference substrate performed by the measurement unit, and determines the second correction value for each of the plurality of groups based on measurement for the non-reference substrate performed by the measurement unit, and one of the measurement for the reference substrate performed by the measurement unit and the first correction value.