Patent ID: 8089615

Claim:
A substrate holding apparatus that holds a substrate, which is irradiated by exposure light, comprising: a base part; a support part that is formed on the base part and supports a rear surface of the substrate; a first circumferential wall that: is formed on the base part; has a first upper surface that opposes the rear surface of the substrate, which is supported by the support part; and surrounds a first space that is between the substrate, which is supported by the support part, and the base part; a second circumferential wall that: is formed on the base part; has a second upper surface that opposes the rear surface of the substrate, which is supported by the support part, with a gap interposed therebetween; and surrounds the first circumferential wall; a third circumferential wall that: is formed on the base part; has a third upper surface that opposes the rear surface of the substrate, which is supported by the support part; and surrounds the support part and the second circumferential wall; a fluid flow port that is capable of supplying gas to a second space that is between the first circumferential wall and the second circumferential wall; and a first suction port that suctions fluid from a third space that is between the second circumferential wall and the third circumferential wall.