Computer-implemented methods, systems, and computer-readable media for determining a model for predicting printability of reticle features on a wafer
First Claim
1. A computer-implemented method for determining a model for predicting printability of reticle features on a wafer, comprising:
- generating different generated models;
generating simulated images of the reticle features printed on the wafer using the different generated models for a set of different values of exposure conditions;
determining one or more characteristics of the reticle features of the simulated images;
comparing the one or more characteristics of the reticle features of the simulated images to one or more characteristics of the reticle features printed on the wafer using a lithography process; and
selecting one of the different generated models as the model to be used for predicting the printability of the reticle features based on results of the comparing step, wherein generating the different generated models, generating the simulated images, said determining, said comparing, and said selecting are performed using a computer system.
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Abstract
Computer-implemented methods, systems, and computer-readable media for determining a model for predicting printability of reticle features on a wafer are provided. One method includes generating simulated images of the reticle features printed on the wafer using different generated models for a set of different values of exposure conditions. The method also includes determining one or more characteristics of the reticle features of the simulated images. In addition, the method includes comparing the one or more characteristics of the reticle features of the simulated images to one or more characteristics of the reticle features printed on the wafer using a lithography process. The method further includes selecting one of the different generated models as the model to be used for predicting the printability of the reticle features based on results of the comparing step.
332 Citations
19 Claims
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1. A computer-implemented method for determining a model for predicting printability of reticle features on a wafer, comprising:
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generating different generated models; generating simulated images of the reticle features printed on the wafer using the different generated models for a set of different values of exposure conditions; determining one or more characteristics of the reticle features of the simulated images; comparing the one or more characteristics of the reticle features of the simulated images to one or more characteristics of the reticle features printed on the wafer using a lithography process; and selecting one of the different generated models as the model to be used for predicting the printability of the reticle features based on results of the comparing step, wherein generating the different generated models, generating the simulated images, said determining, said comparing, and said selecting are performed using a computer system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system configured to determine a model for predicting printability of reticle features on a wafer, comprising:
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a simulation engine configured to generate simulated images of the reticle features printed on the wafer using different generated models for a set of different values of exposure conditions; and a computer system configured to; generate the different generated models prior to generation of the simulated images by the simulation engine determine one or more characteristics of the reticle features of the simulated images; compare the one or more characteristics of the reticle features of the simulated images to one or more characteristics of the reticle features printed on the wafer using a lithography process; and select one of the different generated models as the model to be used for predicting the printability of the reticle features based on results of the comparison.
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19. A non-transitory computer-readable medium, comprising program instructions executable on a computer system for performing a computer-implemented method for determining a model for predicting printability of reticle features on a wafer, wherein the computer-implemented method comprises:
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generating different generated models generating simulated images of the reticle features printed on the wafer using the different generated models for a set of different values of exposure conditions; determining one or more characteristics of the reticle features of the simulated mages; comparing the one or more characteristics of the reticle features of the simulated images to one or more characteristics of the reticle features printed on the wafer using a lithography process; and selecting one of the different generated models as the model to be used for predicting the printability of the reticle features based on results of the comparing step.
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Specification