Patent ID: 7924402

Claim:
An exposure apparatus which forms a liquid immersion area at one part on a substrate, and which exposes the substrate by irradiating an exposure light to the substrate via liquid which forms the liquid immersion area, comprising: a projection optical system via which the substrate is irradiated by the exposure light; a liquid supply device having a liquid supply port, which supplies the liquid for forming the liquid immersion area that covers only a portion of a surface of the substrate during exposure of the substrate; and a detecting device which detects an outer boundary of the liquid immersion area in plan view, wherein the detecting device includes at least one pair of sensors including a first sensor and a second sensor, the first sensor is disposed at a position closer to an optical axis of the exposure apparatus than the second sensor, and the detecting device is configured to detect the liquid between the first sensor and the second sensor on an outer side of the liquid immersion area with respect to the optical axis of the exposure apparatus.