Patent ID: 8891055
Filing Date: 2014-11-18
Classification: G03F

Abstract:
1. A maintenance method for a liquid immersion exposure apparatus in which a substrate is exposed through water during an exposure operation, the method comprising: cleaning a nozzle member with a cleaning liquid during a cleaning operation; after cleaning the nozzle member with the cleaning liquid, supplying water from a supply opening of the nozzle member to at least one of an upper surface of a stage and an upper surface of a dummy substrate and collecting the supplied water from at least one of the upper surface of the stage and the upper surface of the dummy substrate via a collection opening of the nozzle member; and measuring at least either a property or a constituent of the water collected via the collection opening of the nozzle member, wherein the nozzle member is cleaned with the cleaning liquid while the nozzle member is detached from the liquid immersion exposure apparatus.