Liquid immersion type exposure apparatus
First Claim
Patent Images
1. An exposure apparatus, comprising:
- a projection optical system for projecting a pattern of a reticle onto a substrate, wherein the substrate is exposed through a liquid medium kept at least in a portion between the substrate and an optical element of said projection optical system which optical element is nearest to the substrate;
a supplying system for supplying a liquid medium;
a collecting system for collecting a liquid medium; and
an exhausting system for removing a bubble in the liquid medium through a bubble removing material having such property that it passes a gas but it does not pass a liquid.
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Abstract
Disclosed is an exposure apparatus which includes a projection optical system for projecting a pattern of a reticle onto a substrate, wherein the substrate is exposed through a liquid medium kept at least in a portion between the substrate and an optical element of the projection optical system which optical element is nearest to the substrate, a supplying system for supplying a liquid medium, a collecting system for collecting a liquid medium, and an exhausting system for removing a bubble in the liquid medium through a bubble removing material having such property that it passes a gas but it does not pass a liquid.
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Citations
19 Claims
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1. An exposure apparatus, comprising:
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a projection optical system for projecting a pattern of a reticle onto a substrate, wherein the substrate is exposed through a liquid medium kept at least in a portion between the substrate and an optical element of said projection optical system which optical element is nearest to the substrate;
a supplying system for supplying a liquid medium;
a collecting system for collecting a liquid medium; and
an exhausting system for removing a bubble in the liquid medium through a bubble removing material having such property that it passes a gas but it does not pass a liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17)
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15. An exposure apparatus, comprising:
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a projection optical system for projecting a pattern of a reticle onto a substrate, wherein the substrate is exposed through a liquid medium kept at least in a portion between the substrate and an optical element of said projection optical system which optical element is nearest to the substrate;
a supplying system for supplying a liquid medium;
a collecting system for collecting a liquid medium; and
an exhausting system for removing a bubble in the liquid medium through a porous material. - View Dependent Claims (18)
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16. An exposure apparatus, comprising:
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a projection optical system for projecting a pattern of a reticle onto a substrate, wherein the substrate is exposed through a liquid medium kept at least in a portion between the substrate and an optical element of said projection optical system which optical element is nearest to the substrate;
a supplying system for supplying a liquid medium through a porous material; and
a collecting system for collecting a liquid medium. - View Dependent Claims (19)
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Specification