MASK3D model accuracy enhancement for small feature coupling effect
First Claim
1. A method of performing mask topography effect modeling on a mask design layout for integrated circuit design, the method comprising, upon receiving the mask design layout:
- generating scaling parameters for edge coupling effects, each scaling parameter having an associated combination of feature width and space, wherein a sum of feature width and space associated with at least one scaling parameter is less than a minimum pitch; and
using a computing device, applying a thick mask model comprising a plurality of edge-based kernels to the mask design layout to create a mask 3D residual, comprising updating the plurality of edge-based kernels with the scaling parameters.
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Abstract
A method and apparatus of a novel full chip edge-based mask three-dimensional (3D) model for performing photolithography simulation with consideration for edge coupling effect is described. The method receives a mask design layout in order to perform mask topography effect modeling. The method generates scaling parameters for edge coupling effects. Each scaling parameter has an associated combination of feature width and space. The sum of feature width and space associated with at least one scaling parameter is less than a minimum pitch. The method applies a thick mask model that includes several edge-based kernels to the mask design layout to create a mask 3D residual. To apply the thick mask model to the mask design layout, the method updates the edge-based kernels with the scaling parameters.
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Citations
20 Claims
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1. A method of performing mask topography effect modeling on a mask design layout for integrated circuit design, the method comprising, upon receiving the mask design layout:
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generating scaling parameters for edge coupling effects, each scaling parameter having an associated combination of feature width and space, wherein a sum of feature width and space associated with at least one scaling parameter is less than a minimum pitch; and using a computing device, applying a thick mask model comprising a plurality of edge-based kernels to the mask design layout to create a mask 3D residual, comprising updating the plurality of edge-based kernels with the scaling parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A data processing system for performing mask topography effect modeling on a mask design layout, the data processing system comprising:
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a calibrator that is to generate scaling parameters for edge coupling effects, each scaling parameter having an associated combination of feature width and space, wherein a sum of feature width and space associated with at least one scaling parameter is smaller than a minimum pitch; a coupling effect processor that is to update a plurality of edge-based kernels with the scaling parameters; and a rasterization processor that is to apply a thick mask model comprising the updated edge-based kernels to the mask design layout to create a mask 3D residual. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A computer program product stored as program code on a non-transitory computer-readable medium, the program code executable by at least one processor for performing mask topography effect modeling on a mask design layout, the computer program product comprising a computer readable program code comprising instructions for:
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generating scaling parameters for edge coupling effects, each scaling parameter having an associated combination of feature width and space, wherein a sum of feature width and space associated with at least one scaling parameter is less than a minimum pitch; and using a computing device, applying a thick mask model comprising a plurality of edge-based kernels to the mask design layout to create a mask 3D residual, comprising updating the plurality of edge-based kernels with the scaling parameters. - View Dependent Claims (19, 20)
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Specification