Patent ID: 8228482
Filing Date: 2012-07-24
Classification: G03F

Abstract:
1. An exposure apparatus apparatus comprising: a movable body which holds an object and substantially moves along a predetermined plane; a liquid supply device which supplies liquid on a surface of the movable body on which the object is mounted including a surface of the object; a pattern generation device including an optical system which has liquid supplied to a space formed with the surface of the movable body, the pattern generation device irradiating an energy beam on the object via the optical system and the liquid and forming a pattern on the object; a measurement system which includes an encoder system that has a plurality of encoder heads placed on the surface of the movable body and that measures positional information of the movable body, based on an output of a predetermined number of the encoder heads facing a grating section placed parallel to the predetermined plane external to the movable body; and a detection device which is connected to the measurement system, and for at least one of the plurality of encoder heads, detects residual information of the liquid on a photodetection section of the encoder head and outputs the detection results to the measurement system, wherein the encoder system measures positional information of the movable body within the predetermined plane based on an output of the predetermined number of the encoder heads except for an encoder head which was detected to have liquid remaining by the detection device.