Lithographic apparatus and device manufacturing method
First Claim
1. A lithographic apparatus, comprising:
- an illumination system configured to provide a radiation beam;
a product patterning device configured to pattern the radiation beam with a product pattern representing features of a product device;
a metrology target patterning device configured to pattern the radiation beam with a metrology target pattern representing at least one metrology target;
a metrology target pattern controller configured to adjust the metrology target pattern independently of said product pattern;
a support structure configured to support the product patterning device and the metrology target patterning device, such that they are separated from each other; and
a projection system configured to project the radiation patterned by said product patterning device and said metrology target patterning device onto a target portion of a substrate;
wherein said metrology target pattern controller adjusts the metrology target pattern after said product pattern has been finalized and prior to the projecting of the radiation patterned by the product patterning device onto the substrate.
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Accused Products
Abstract
A lithographic apparatus and method comprise an illumination system arranged to provide a radiation beam, a support structure configured to support a product patterning device and a metrology target patterning device. The product patterning device imparts a radiation beam derived from the illumination system with a product pattern in its cross-section representing features of a product device to be formed. The metrology target patterning device imparts the radiation beam with a metrology target pattern in its cross-section representing at least one metrology target. The product patterning device is separate from the metrology target patterning device. A substrate table holds a substrate. A projection system project the radiation patterned by the product patterning device and the metrology target patterning device onto a target portion of the substrate. A metrology target patterning device controller adjusts the metrology target pattern independently of the product pattern.
40 Citations
18 Claims
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1. A lithographic apparatus, comprising:
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an illumination system configured to provide a radiation beam; a product patterning device configured to pattern the radiation beam with a product pattern representing features of a product device; a metrology target patterning device configured to pattern the radiation beam with a metrology target pattern representing at least one metrology target; a metrology target pattern controller configured to adjust the metrology target pattern independently of said product pattern; a support structure configured to support the product patterning device and the metrology target patterning device, such that they are separated from each other; and a projection system configured to project the radiation patterned by said product patterning device and said metrology target patterning device onto a target portion of a substrate; wherein said metrology target pattern controller adjusts the metrology target pattern after said product pattern has been finalized and prior to the projecting of the radiation patterned by the product patterning device onto the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A lithographic apparatus, comprising:
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an illumination system configured to supply a beam of radiation; a control system configured to control an array of individually controllable elements to pattern the beam; a projection system configured to project the patterned beam onto a target portion of a substrate, wherein said control system receives a first data file comprising product pattern data representing features of a product device to be formed, and wherein said control system receives a second data file comprising metrology target data representing a metrology target pattern and an intended metrology target location on the substrate wherein the control system modifies the second data file after receiving the first data file and prior to the projecting of the patterned beam onto the target portion of the substrate. - View Dependent Claims (17, 18)
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Specification