Patent ID: 8390783
Filing Date: 2013-03-05
Classification: G03F

Abstract:
1. An exposure device for exposing a photosensitive substrate with a reflection mask pattern, comprising: a projection optical system configured to project the reflection mask pattern, the projection optical system comprising an exposure area defining member configured to define a shape of light incident on the photosensitive substrate; a height-direction position measuring device configured to measure a height position of the reflection mask at a position where a measuring light is not obstructed by the exposure area defining member, and configured to measure a measurement area defined on the mask that is greater than the area of the shape of light defined by the exposure area defining member wherein the measuring light reaches a surface of the mask which includes the area of the shape of light defined by the exposure area defining member and a peripheral region of the area of the shape of light defined by the exposure area defining member; and a mover configured to move the reflection mask according to the height position of the reflection mask as measured by the height-direction position measuring device.