Patent ID: 9383656
Filing Date: 2016-07-05
CPC Classification: G03F

Claim Text:
1. A liquid immersion exposure apparatus comprising: a projection system having a last optical element, the projection system projecting an exposure beam onto a substrate through an immersion liquid; a movable stage having a holder by which the substrate is held; an alignment system which is arranged at a position different from a position at which the projection system is arranged, and by which an alignment mark on the substrate is detected not through the immersion liquid; and a measurement member provided on the movable stage, the measurement member having a reference mark to be detected by the alignment system not through the immersion liquid, the measurement member having a first material to form the reference mark, the first material being covered with a light-transmissive material, wherein the movable stage is movable to a position so that the measurement member is under the projection system and a gap between the projection system and the measurement member is filled with the immersion liquid, and a coating of the light-transmissive material is applied over the first material.