Patent ID: 9195129
Filing Date: 2015-11-24
Classification: G03B,G03F

Abstract:
1. A stage apparatus for moving a substrate, comprising: a chuck that holds the substrate using an adsorption by a negative pressure; a plurality of sensors that measure pressure in a negative pressure space during the adsorption; a control section that controls a movement of the chuck based on the outputs of the plurality of sensors, wherein the control section controls the movement of the chuck based on a first speed information when all outputs of the plurality of sensors exceed a first threshold value indicating a predetermined pressure, controls the movement of the chuck based on a second speed information of a speed that is lower than that of the first speed information when any one of the outputs of the plurality of sensors have not reached the first threshold value, and provides an error notification when the outputs of the plurality of sensors indicate a pressure distribution having a range that is narrower than that of a predetermined pressure distribution.