Patent ID: 9224632
Filing Date: 2015-12-29
Classification: G03F,H01L

Abstract:
1. A substrate holding apparatus that holds a substrate, to an upper surface of which a liquid is supplied, and that moves relative to a liquid immersion region formed by the liquid, the apparatus comprising: a base; a first support part, which is formed on the base and supports a rear surface of the substrate; a first circumferential wall part, which is formed on the base and is provided so that the first circumferential wall part comprises an upper surface which opposes the rear surface of the substrate supported by the first support part and surrounds the first support part; a suction port that is (i) provided facing a first space defined by side surfaces comprising a portion of the base, a portion of the first circumferential wall part, and a portion of the substrate and (ii) capable of suctioning a gas in the first space, so that the first space is negatively pressurized; a second circumferential wall part, which is provided outside the first circumferential wall part; a side surface part which is provided along an outer side surface of the second circumferential wall part so that the side surface part surrounds the outer side surface of the second circumferential wall part; and a plurality of first recovery ports, which are provided facing a second space between an outer side surface of the first circumferential wall part and an inner side surface of the second circumferential wall part and recovers a liquid which infiltrates the second space, a vertical cross sectional shape of the first support part and a vertical cross sectional shape of the first circumferential wall part are different from each other.