Exposure apparatus and method for producing device
First Claim
1. An exposure apparatus for exposing a substrate by transferring an image of a pattern through a liquid onto the substrate, comprising:
- a projection optical system which projects the image of the pattern onto the substrate;
a first substrate stage which holds the substrate;
a liquid supply unit which supplies the liquid to a side of an image plane of the projection optical system; and
a surface-detecting system which detects surface information about a surface of the substrate by radiating a detecting beam onto the substrate not through the liquid, wherein;
the substrate is subjected to liquid immersion exposure while adjusting a positional relationship between the surface of the substrate and the image plane formed through the liquid by the projection optical system on the basis of the detected surface information.
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Accused Products
Abstract
An exposure apparatus performs exposure for a substrate by filling a space between a projection optical system and the substrate with a liquid and projecting an image of a pattern onto the substrate through the liquid by using the projection optical system. The exposure apparatus includes a substrate stage for holding the substrate, a liquid supply unit for supplying the liquid to a side of an image plane of the projection optical system, and a focus/leveling-detecting system for detecting surface information about a surface of the substrate not through the liquid. The exposure apparatus performs liquid immersion exposure for the substrate while adjusting a positional relationship between the surface of the substrate and the image plane formed through the projection optical system and the liquid, on the basis of the surface information detected by the focus/leveling-detecting system. The liquid immersion exposure can be performed at a satisfactory pattern transfer accuracy.
118 Citations
61 Claims
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1. An exposure apparatus for exposing a substrate by transferring an image of a pattern through a liquid onto the substrate, comprising:
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a projection optical system which projects the image of the pattern onto the substrate; a first substrate stage which holds the substrate; a liquid supply unit which supplies the liquid to a side of an image plane of the projection optical system; and a surface-detecting system which detects surface information about a surface of the substrate by radiating a detecting beam onto the substrate not through the liquid, wherein; the substrate is subjected to liquid immersion exposure while adjusting a positional relationship between the surface of the substrate and the image plane formed through the liquid by the projection optical system on the basis of the detected surface information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An exposure apparatus for exposing a plurality of shot areas on a substrate by successively exposing the plurality of shot areas on the substrate with an image of a pattern through a liquid, comprising:
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a projection optical system which projects the image of the pattern onto the substrate; a first substrate stage which holds the substrate; a liquid supply unit which supplies the liquid to a side of an image plane of the projection optical system; and a first alignment system which detects an alignment mark on the substrate not through the liquid, wherein; the substrate is subjected to liquid immersion exposure while performing alignment of the substrate and the pattern on the basis of a result of the detection performed by the first alignment system. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An immersion exposure apparatus comprising:
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an optical element through which a substrate is exposed with an exposure beam during liquid immersion exposure, while filling a space between the optical element and the substrate with an immersion liquid; and a measuring system which has a light receiver to receive a light from the substrate not through the immersion liquid and which obtains positional information of the substrate using the light receiver, wherein during the liquid immersion exposure, the substrate is moved on the basis of the positional information obtained by the measuring system. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
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Specification