Patent ID: 7315350
Filing Date: 2008-01-01
Classification: G03F

Abstract:
1. An exposure apparatus for exposing a substrate to light via a reticle while the substrate and the reticle are scanned in a scanning direction, based on information of a shape of the reticle, the reticle having a plurality of chip patterns arranged along the scanning direction with a space arranged therebetween, said apparatus comprising: a projection optical system configured to project light from the reticle onto the substrate; a reticle stage configured to hold the reticle and to be moved in the scanning direction; a measurement system configured to measure a position of a surface of the reticle in a direction of an optical axis of said projection optical system; and a controller configured to generate information regarding positions of measurement points to be arranged on the surface so that at least a pair of the measurement points are arranged at a repetition period of the plurality of chip patterns or an integer multiple of the period in the scanning direction, based on information of the plurality of chip patterns, measurement performed by said measurement system with respect to the measurement points being used to obtain the information regarding the shape, and said controller being further configured to control a position of said reticle stage to move the reticle in the scanning direction, and to control an operation of said measurement system based on the generated information and information regarding the controlled position of said reticle stage so that said measurement system measures a position of the surface with respect to each of the measurement points while the reticle is moved on the scanning direction.