Patent ID: 8488099
Filing Date: 2013-07-16
Classification: G03F

Abstract:
1. An exposure apparatus that exposes a substrate by irradiating exposure light onto the substrate via a liquid, comprising: a projection optical system having an optical member, the substrate being exposed to the exposure light from the optical member through the liquid between the optical member and the substrate; a liquid recovery system having a recovery port, and a plurality of porous members including a first porous member and a second porous member provided over the recovery port, each of the first and second porous members having a plurality of pores, and the pores of the first porous member being different from the pores of the second porous member in size, wherein the liquid on the substrate is recovered into a recovery flow passage after passing through the pore of the first porous member and then passing through the pore of the second porous member.