Patent ID: 8928856
Filing Date: 2015-01-06
Classification: G03F

Abstract:
1. An exposure apparatus comprising: a stage apparatus configured to hold a substrate and having a surrounding portion that is arranged to surround the substrate; a liquid immersion system having a supply port and a collection port via which a liquid is supplied and collected respectively, to form a liquid immersion region; a projection optical system having an optical element and configured to project a pattern image onto the substrate through the liquid of the liquid immersion region that is formed between the optical element and a local area on the substrate; a light-transmissive member provided at the stage apparatus, the light-transmissive member having an upper surface that is substantially coplanar with an upper surface of the substrate held on the stage apparatus and with an upper surface of the surrounding portion of the stage apparatus; and a measurement system having a light-receiving part and configured to measure a wavefront aberration, the light-receiving part being provided at the stage apparatus and configured to receive light for measuring the wavefront aberration, through the liquid and through the light-transmissive member.