Lithographic apparatus and device manufacturing method
First Claim
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1. A lithographic apparatus, comprising:
- an illumination system that produces a beam of radiation;
an array of individually controllable elements that patterns the beam; and
a projection system that projects the patterned beam onto a target portion of a substrate,wherein each element in the array of individually controllable elements comprises a stack of top, middle, and bottom dielectric layers, at least the middle dielectric layer comprising a solid state electro-optical material, andwherein each element is configured such that at least two layers of the electro-optical material are arranged so that their extraordinary axes are substantially mutually perpendicular.
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Abstract
An array of individually controllable elements is comprised of elements, each formed of a stack of layers of dielectric material. At least one layer is an electro-optical material. The at least one layer'"'"'s refractive index for radiation that is plane polarized in a given direction can be changed by application of a voltage in order to change the reflection/transmission characteristic of the boundary between this layer and the adjacent layer.
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14 Claims
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1. A lithographic apparatus, comprising:
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an illumination system that produces a beam of radiation; an array of individually controllable elements that patterns the beam; and a projection system that projects the patterned beam onto a target portion of a substrate, wherein each element in the array of individually controllable elements comprises a stack of top, middle, and bottom dielectric layers, at least the middle dielectric layer comprising a solid state electro-optical material, and wherein each element is configured such that at least two layers of the electro-optical material are arranged so that their extraordinary axes are substantially mutually perpendicular. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An array of individually controllable elements that pattern a beam of radiation, wherein each element in the array of individually controllable elements comprises:
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top, middle, and bottom dielectric layers, at least the middle dielectric layer being formed of a solid state electro-optical material, wherein each of the elements in the array of individually controllable elements is configured to control a propagation of the radiation that is plane polarized in a first direction and, independently, a propagation of the radiation that is plane polarized in a second direction and substantially orthogonal to the first direction. - View Dependent Claims (9, 10)
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11. A device manufacturing method, comprising:
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forming each element in an array of individually controllable elements from top, middle, and bottom dielectric layers; forming at least the middle dielectric layer from a solid state electro-optical material; arranging extraordinary axes of at least two of the dielectric layers to be substantially mutually perpendicular to one another; patterning a beam of radiation from an illumination source using the array of individually controllable elements; and projecting the patterned beam onto a target portion of a substrate. - View Dependent Claims (12, 13, 14)
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Specification