Patent ID: 8711327
Filing Date: 2014-04-29
Classification: G03F

Abstract:
1. An exposure apparatus that exposes an object with an energy beam, the apparatus comprising: a movable body on which the object is held and which is movable substantially along a predetermined plane within an area of a predetermined range which includes a first area including an exposure position where at least an exposure to the object which is mounted is performed, a second area positioned on one side in a first direction of the first area where at least an exchange of the object is performed, and a third area which is between the first area and the second area; a first grating section placed at a position corresponding to the third area on a plane parallel to the predetermined plane, the first grating section facing from above a surface substantially parallel to the predetermined plane of the movable body; and a measurement device including an encoder system and an interferometer system, the encoder system measuring positional information of the movable body within the predetermined plane based on output of a first encoder head, a second encoder head and a third encoder head arranged on the surface of the movable body, each encoder head facing the first grating section, the first encoder head and the third encoder head measuring positional information of the movable body in at least one direction parallel to the predetermined plane, the second encoder head measuring positional information of the movable body in at least another direction different from the one direction and parallel to the predetermined plane, the first encoder head and the second encoder head being disposed adjacent to each other at a corner of the surface of the movable body, a first side of the movable body and a second side of the movable body forming the corner, the first encoder head and the third encoder head being disposed along the first side of the movable body, the first encoder head and the second encoder head being disposed along the second side of the movable body, and the interferometer system irradiating a measurement beam on a reflection surface arranged on the movable body and measuring positional information of the movable body in at least the first area and the second area, whereby the third area includes a movement path of the movable body where the measurement beam moves off from the reflection surface.