| 主权项 |
1. An exposure apparatus that exposes a substrate with illumination light via a projection optical system and via liquid, the exposure apparatus comprising:
a liquid immersion member arranged to form a liquid immersion region with liquid below the projection optical system, the liquid immersion member surrounding an optical member of the projection optical system and having a lower surface in which an opening portion, through which the illumination light passes, is formed; first and second movable members each having (a) an upper surface arranged to be in contact with the liquid immersion region, (b) amount area, for the substrate, provided in a first opening formed on the upper surface, and (c) a reference provided on the upper surface, the first and second movable members each configured such that the upper surface thereof is arranged to maintain at least a part of the liquid immersion region, which is located outside the substrate mounted on the mount area in the first opening; a measuring system configured to perform a measurement using the reference via the projection optical system; a drive system having a motor, parts of which are provided at the first and second movable members respectively, and configured to move the first and second movable members by use of the motor; and a controller configured to control movement of the first and second movable members by the drive system, wherein the controller is configured to control the first and second movable members so as to execute a relative movement between the first and second movable members such that, while one of the first and second movable members is arranged opposed to the projection optical system, the other of the first and second movable members comes close to the one of the first and second movable members, and so as to move the close first and second movable members relative to the projection optical system in a predetermined direction perpendicular to an optical axis of the projection optical system such that the other of the first and second movable members is arranged opposed to the projection optical system in place of the one of the first and second movable members while substantially maintaining the liquid immersion region under the projection optical system and such that the measurement by the measuring system is executed using the reference of the other one of the first and second movable members, which is arranged opposed to the projection optical system after the movement of the close first and second movable members, and such that the one of the first and second movable members is moved from under the projection optical system to a substrate exchange position and then the substrate is exchanged, when the liquid immersion region is maintained under the projection optical system by the one of the first and second movable members which is arranged opposed to the projection optical system, the other of the first and second movable members is away from under the projection optical system, and the liquid immersion region is formed with the liquid which is supplied via the liquid immersion member, and the liquid of the liquid immersion region is collected via the liquid immersion member. |
