Patent ID: 9645505
Date: 2017-05-09
CPC Classifications: G03B,G03F

Claim:
1. An exposure apparatus in which a substrate is exposed to an exposure beam through an immersion liquid, the apparatus comprising: a projection system having a plurality of optical elements including a final element; a holding structure which holds the plurality of optical elements, the holding structure having a flange provided at an outer periphery thereof; a supporting structure which supports the holding structure, the supporting structure having a supporting portion on which the flange of the holding structure is mounted; a nozzle member having an aperture through which the exposure beam passes, the nozzle member having a supply opening facing downwardly and from which the immersion liquid is supplied, and a recovery opening facing downwardly and from which the supplied immersion liquid is collected, the supply opening being arranged between the aperture and the recovery opening; an anti-vibration device disposed between the supporting structure and the nozzle member, and which prevents vibrations of the supporting structure caused by the nozzle member; and a measuring device that measures at least one of a property and a composition of the immersion liquid in a flow path disposed downstream of the recovery opening, while the immersion liquid is in the exposure apparatus, the measuring device including at least one of: