Lithographic apparatus and device manufacturing method
First Claim
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1. A lithographic apparatus comprising:
- a support structure for supporting a patterning device, the patterning device serving to pattern a projection beam according to a desired pattern;
a substrate table for holding a substrate; and
a projection system for projecting the patterned beam onto a target portion of the substrate; and
an optical system configured and arranged to provide said projection beam with a first part and a second part for cooperation with the patterning device having a first patterning region and a second patterning region such that radiation in said second part of said projection beam is substantially prevented from being incident on said first patterning region of said patterning device.
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Abstract
A method and apparatus, in particular for microlithographic exposure, comprising a radiation system for providing a projection beam of radiation; a support structure for supporting a patterning device, the patterning device serving to pattern the projection beam according to a desired pattern; a substrate table for holding a substrate; and a projection system for projecting the patterned beam onto a target portion of the substrate. Embodiments of the invention divide the projection beam into regions and select which features on the mask will be illuminated by which regions of the projection beam.
21 Citations
16 Claims
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1. A lithographic apparatus comprising:
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a support structure for supporting a patterning device, the patterning device serving to pattern a projection beam according to a desired pattern;
a substrate table for holding a substrate; and
a projection system for projecting the patterned beam onto a target portion of the substrate; and
an optical system configured and arranged to provide said projection beam with a first part and a second part for cooperation with the patterning device having a first patterning region and a second patterning region such that radiation in said second part of said projection beam is substantially prevented from being incident on said first patterning region of said patterning device. - View Dependent Claims (2, 3, 4)
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5. A patterning device for use in a lithographic apparatus including a projection beam having first and second parts, comprising:
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a first patterning region and a second patterning region;
an optical member covering the first patterning region so as to substantially prevent radiation from the second part of the projection beam from being incident upon the first patterning region. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A device manufacturing method comprising:
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providing a projection beam of radiation comprising a first part and a second part;
using a patterning device with a first patterning region and a second patterning region, said patterning device substantially preventing radiation from said second part of said projection beam from being incident upon said first patterning region of said patterning device;
patterning the projection beam with a pattern in its cross-section using a patterning device; and
projecting the patterned beam of radiation onto a target portion of the layer of radiation-sensitive material. - View Dependent Claims (12, 13, 14, 15)
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16. A lithographic apparatus comprising:
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a support structure for supporting a patterning device, the patterning device serving to pattern a projection beam according to a desired pattern;
a substrate table for holding a substrate; and
a projection system for projecting the patterned beam onto a target portion of the substrate, wherein said patterning device comprises an optical attenuator covering a patterning region of said patterning device so as to substantially reduce the intensity of radiation being incident upon said patterning region.
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Specification