EXPOSURE APPARATUS AND METHOD OF PRODUCING DEVICE

摘要

An exposure apparatus (EX) has an exposure region (E) for irradiating exposure light (EL) to a substrate (W) through an optical system (30) and liquid (LQ) and has a measurement region (A) for acquiring information on the position of the substrate (W) prior to the exposure. The substrate (W) is exposed when moved between the exposure region (E) and the measurement region (A). The exposure apparatus (EX) has an entry shutoff mechanism (60) for preventing a gas (G) in the vicinity of the exposure region (E) from entering into the measurement region (A).