Patent ID: 8749759

Claim:
An exposure apparatus that exposes a substrate with exposure light from a projection optical system via an immersion region formed with liquid below the projection optical system, the exposure apparatus comprising: a stage on which a substrate holder to hold the substrate is provided, and which is capable of moving relative to the projection optical system; a sensor that includes a light transmissive member provided on the stage and that detects the exposure light via the light transmissive member comprising a first surface and a second surface, the light transmissive member being arranged to allow the exposure light from the projection optical system to enter into the first surface via the immersion region and to exit from the second surface; a liquid-proof member that is provided on the stage, wherein the first surface is substantially flush with an upper surface of the stage and is arranged to come into contact with the immersion region in a state of being disposed under the projection optical system by the stage, and the liquid-proof member is arranged in a space between the light transmissive member and the stage to prevent the liquid from inflowing into the space.