Patent ID: 9001306
Filing Date: 2015-04-07
Classification: G03B,G03F

Abstract:
1. A scanning exposure apparatus for projecting a pattern of a reticle onto a substrate via a projection optical system using slit-shaped light while scanning the reticle and the substrate, to expose the substrate, the apparatus comprising: a stage that holds the substrate; a positioning mechanism that positions said stage in a scanning direction and an optical axis direction of the projection optical system; a measurement device that measures a level of the substrate that is a position of the substrate in the optical axis direction at a plurality of measurement points located with spacings therebetween in the scanning direction; and a controller, wherein the plurality of measurement points include a first measurement point outside a region in which the slit-shaped light is incident on the substrate, wherein the scanning exposure apparatus is configured to measure the level of the substrate at the first measurement point using said measurement device, and scan the substrate while positioning said stage in the optical axis direction using said positioning mechanism based on the level measured at the first measurement points, and wherein said controller: