Patent ID: 7982849

Claim:
An exposure apparatus comprising: a projection optical system configured to project a pattern of an original plate onto a substrate; a measurement optical system configured to measure a position or a surface shape of the substrate; a plurality of moving members configured to hold the substrate; a first region on which one of the moving members moves for projecting the pattern of the original plate onto the substrate by the projection optical system; a second region on which one of the moving members moves for measuring the position or the surface shape of the substrate by the measurement optical system; a first interferometer configured to measure a position of the moving member positioned in the optical path of the projection optical system; a second interferometer configured to measure a position of the moving member positioned in an optical path of the measurement optical system; a blower device for blowing temperature-adjusted gas; a first supply opening communicating with the blower device, configured to provide air conditioning to a light path of measurement light illuminating the moving member from the first interferometer; a second supply opening communicating with the blower device, configured to provide air conditioning to a light path of measurement light illuminating the moving member from the second interferometer; a flow rate adjusting device configured to adjust a flow rate and supply gas blown from the blower device to each of the first supply opening and the second supply opening based on an operation of the moving member; and a comparison unit configured to compare an operation of the moving member positioned in the first region and an operation of the moving member positioned in the second region among the plurality of moving members, wherein the flow rate adjusting device adjusts a flow rate based on the comparison result of the comparison unit.