Patent ID: 8294878

Claim:
An exposure apparatus that exposes an object with an energy beam via an optical system supported by a first support member, the apparatus comprising: a movable body that holds the object and is movable along a predetermined two-dimensional plane; a guide surface forming member that forms a guide surface used when the movable body moves along the two-dimensional plane; a first drive system that drives the movable body; a second support member that is placed apart from the guide surface forming member on a side opposite to the optical system, via the guide surface forming member, so as to be separated from the first support member; a first measurement system which includes a first measurement member that irradiates a measurement surface parallel to the two-dimensional plane with a measurement beam and receives light from the measurement surface, and which obtains positional information of the movable body at least within the two-dimensional plane using an output of the first measurement member, the measurement surface being arranged at one of the movable body and the second support member and at least a part of the first measurement member being arranged at the other of the movable body and the second support member; and a second measurement system that obtains positional information of the second support member.