Immersion type projection exposure apparatus
First Claim
Patent Images
1. A projection exposure apparatus, comprising:
- illumination means for illuminating a pattern of an original;
holding means for holding a substrate;
a projection system for projecting an image of the pattern of the original onto the substrate held by said holding means, said projection system including a projection optical system and a plane optical element spaced from said projection optical system and disposed opposite to the surface of the substrate; and
a casing having a filled interspace formed between said optical element and the substrate, wherein said optical element provides an upper cover of said casing, and a portion of an outer wall of said casing is covered by a heat insulating material.
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Abstract
A projection exposure apparatus includes an illuminating device for illuminating a pattern of an original, a holder for holding a substrate, and a projection system for projecting an image of the pattern of the original onto the substrate. The projection system includes a projection optical system and a plane optical element spaced from the projection optical system and disposed opposite to the surface of the substrate. Also provided is a casing having a filled interspace formed between the optical element and the substrate, with the optical element providing an upper cover of the casing.
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Citations
29 Claims
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1. A projection exposure apparatus, comprising:
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illumination means for illuminating a pattern of an original; holding means for holding a substrate; a projection system for projecting an image of the pattern of the original onto the substrate held by said holding means, said projection system including a projection optical system and a plane optical element spaced from said projection optical system and disposed opposite to the surface of the substrate; and a casing having a filled interspace formed between said optical element and the substrate, wherein said optical element provides an upper cover of said casing, and a portion of an outer wall of said casing is covered by a heat insulating material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 29)
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19. A projection exposure apparatus, comprising:
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illumination means for illuminating a pattern of an original; holding means for holding a substrate; a projection system for projecting an image of the pattern of the original onto the substrate held by said holding means, said projection system including a projection optical system and a plane optical element spaced from said projection optical system and disposed opposite to the surface of the substrate; a casing having a filled interspace formed between said optical element and the substrate opposed to each other, wherein said optical element provides an upper cover of said casing; and a pressure gauge for detecting the pressure of a filling liquid disposed in the interspace. - View Dependent Claims (20, 21, 22, 23)
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24. A projection exposure apparatus, comprising:
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illumination means for illuminating a pattern of an original; holding means for holding a substrate; a projection system for projecting an image of the pattern of the original onto the substrate held by said holding means, said projection system including a projection optical system and a plane optical element spaced from said projection optical system and disposed opposite to the surface of the substrate; a casing having a filled interspace between said optical element and the substrate, wherein said optical element provides an upper cover of said casing; and ultrasonic vibration means for vibrating a filling liquid filling the interspace with ultrasonic vibrations. - View Dependent Claims (25, 26)
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27. A projection exposure apparatus, comprising:
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illumination means for illuminating a pattern of an original; holding means for holding a substrate; a projection system for projecting an image of the pattern of the original onto the substrate held by said holding means, said projection system including a projection optical system and a plane optical element spaced from said projection optical system and disposed opposite to the surface of the substrate; a casing having a filled interspace formed between said optical element and the substrate, wherein said optical element provides an upper cover of said casing; and attitude control means for tilting or holding said casing upright, wherein during injection of a filling liquid into the interspace said casing is tiled or held upright so that the liquid is injected thereinto from below.
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28. A projection exposure apparatus, comprising:
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illumination means for illuminating a pattern of an original; holding means for holding a substrate; a projection system for projecting an image of the pattern of the original onto the substrate held by said holding means, said projection system including a projection optical system and a plane optical element spaced from said projection optical system and disposed opposite to the surface of the substrate; a casing having a filled interspace formed between said optical element and the substrate, wherein said optical element provides an upper cover of said casing; and means for measuring the refractive index of a filling material filling the interspace.
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Specification