Exposure apparatus and device manufacturing method
First Claim
Patent Images
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, anda 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.
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Abstract
An exposure apparatus is provided that performs well a liquid supply operation for forming a liquid immersion region and a liquid recovery operation to form a liquid immersion region in a desired state, thereby allowing high exposure accuracy and high measurement accuracy. The exposure apparatus (EX) exposes a substrate (P) by irradiating exposure light (EL) onto the substrate (P) via a liquid (LQ), and includes a liquid supply mechanism (10) that has a supply port (13) capable of supplying the liquid (LQ) substantially in parallel with a surface of the substrate (P).
53 Citations
27 Claims
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1. An exposure apparatus that exposes a substrate by irradiating exposure light onto the substrate via a liquid, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An exposure apparatus that exposes a substrate by irradiating exposure light onto the substrate via a liquid, comprising:
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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; and a liquid immersion member disposed such that the liquid immersion member surrounds the optical member, the liquid immersion member being provided with a first porous member and a second porous member, each of the first and second porous members having a plurality of pores, and a size of the pores of the first porous member being different from a size of the pores of the second porous member, wherein the liquid between the first porous member and the substrate is sucked and 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. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method used in an exposure apparatus, the method comprising:
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exposing a substrate by irradiating exposure light onto the substrate via a liquid between an optical member of a projection optical system and the substrate; and recovering the liquid from on the substrate through pores of first and second porous members of a liquid immersion member which is disposed such that the liquid immersion member surrounds the optical member, a size of the pores of the first porous member being different from a size of the pores of the second porous member, wherein the liquid between the first porous member and the substrate is sucked and 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. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification