Lithography model for three-dimensional patterning device
First Claim
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1. A method comprising:
- determining, by a hardware computer device, a scattering function of a patterning device using one or more scattering functions of feature elements of one or more features of the patterning device, the one or more scattering functions of feature elements including one or more scattering functions that characterize scattering of incident radiation fields at a plurality of incident angles on the feature elements, wherein the scattering function of the patterning device is calculated by summing products or convolutions of the one or more scattering functions of the feature elements, and one or more filter functions that depend on locations of the feature elements on the patterning device;
calculating, by the computer device, a scattered radiation field of the patterning device expected in a lithographic projection apparatus from the scattering function of the patterning device and an incident radiation field having a chief ray angle that is oblique to the patterning device; and
storing in a non-transitory computer-readable medium and/or providing to a lithographic projection apparatus, data and/or instructions based on the scattered radiation field, where the data and/or instructions, or information derived therefrom, are configured for design, control and/or modification of a physical manufacturing process involving use of the patterning device in a lithographic projection apparatus and/or for design, control and/or modification of a physical object or apparatus to be used in the manufacturing process.
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Abstract
A computer-implemented method for simulating a scattered radiation field of a patterning device including one or more features, in a lithographic projection apparatus, the method including: determining a scattering function of the patterning device using one or more scattering functions of feature elements of the one or more features; wherein at least one of the one or more features is a three-dimensional feature, or the one or more scattering functions characterize scattering of incident radiation fields at a plurality of incident angles on the feature elements.
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Citations
20 Claims
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1. A method comprising:
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determining, by a hardware computer device, a scattering function of a patterning device using one or more scattering functions of feature elements of one or more features of the patterning device, the one or more scattering functions of feature elements including one or more scattering functions that characterize scattering of incident radiation fields at a plurality of incident angles on the feature elements, wherein the scattering function of the patterning device is calculated by summing products or convolutions of the one or more scattering functions of the feature elements, and one or more filter functions that depend on locations of the feature elements on the patterning device; calculating, by the computer device, a scattered radiation field of the patterning device expected in a lithographic projection apparatus from the scattering function of the patterning device and an incident radiation field having a chief ray angle that is oblique to the patterning device; and storing in a non-transitory computer-readable medium and/or providing to a lithographic projection apparatus, data and/or instructions based on the scattered radiation field, where the data and/or instructions, or information derived therefrom, are configured for design, control and/or modification of a physical manufacturing process involving use of the patterning device in a lithographic projection apparatus and/or for design, control and/or modification of a physical object or apparatus to be used in the manufacturing process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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determining, by a hardware computer device, a scattering function of a patterning device using one or more scattering functions of feature elements of one or more features of the patterning device, wherein the one or more scattering functions of feature elements and/or the scattering function of the patterning device characterizes a mask defocus between an object plane of a projection system arranged to receive radiation from the patterning device and a plane located at the top of the one or more features of the patterning device; and calculating, by the computer device, a scattered radiation field of the patterning device expected in a lithographic projection apparatus, from the scattering function of the patterning device and an incident radiation field; and storing in a non-transitory computer-readable medium and/or providing to a lithographic projection apparatus, data and/or instructions based on the scattered radiation field, where the data and/or instructions, or information derived therefrom, are configured for design, control and/or modification of a physical manufacturing process involving use of the patterning device in a lithographic projection apparatus and/or for design, control and/or modification of a physical object or apparatus to be used in the manufacturing process. - View Dependent Claims (13, 14, 15, 16)
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17. A method comprising:
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determining, by a hardware computer device, a scattering function of a patterning device using one or more scattering functions of feature elements of one or more features of the patterning device, wherein the one or more scattering functions characterize secondary scattering among the one or more features, the secondary scattering comprising radiation scattered from one or more features that has been scattered by one or more other features; and calculating, by the computer device, a scattered radiation field of the patterning device expected in a lithographic projection apparatus from the scattering function of the patterning device and an incident radiation field; and storing in a non-transitory computer-readable medium and/or providing to a lithographic projection apparatus, data and/or instructions based on the scattered radiation field, where the data and/or instructions, or information derived therefrom, are configured for design, control and/or modification of a physical manufacturing process involving use of the patterning device in a lithographic projection apparatus and/or for design, control and/or modification of a physical object or apparatus to be used in the manufacturing process. - View Dependent Claims (18, 19, 20)
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Specification