Computer-implemented methods, computer-readable media, and systems for determining one or more characteristics of a wafer
First Claim
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1. A computer-implemented method for determining one or more characteristics of a wafer, comprising:
- using a computer system to perform the steps of;
acquiring output generated for the wafer by an inspection system;
separately altering the output generated for different locations on the wafer using a reference corresponding to the different locations on the wafer, wherein the output that is altered comprises output that does not correspond to defects on the wafer; and
determining one or more characteristics of the wafer using the altered output, wherein the one or more characteristics comprise at least one characteristic that is not spatially localized in two dimensions.
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Abstract
Computer-implemented methods, computer-readable media, and systems for determining one or more characteristics of a wafer are provided.
126 Citations
19 Claims
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1. A computer-implemented method for determining one or more characteristics of a wafer, comprising:
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using a computer system to perform the steps of; acquiring output generated for the wafer by an inspection system; separately altering the output generated for different locations on the wafer using a reference corresponding to the different locations on the wafer, wherein the output that is altered comprises output that does not correspond to defects on the wafer; and determining one or more characteristics of the wafer using the altered output, wherein the one or more characteristics comprise at least one characteristic that is not spatially localized in two dimensions. - 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 non-transitory computer-readable medium storing program instructions executable on a computer system for performing a computer-implemented method for determining one or more characteristics of a wafer, wherein the computer-implemented method comprises:
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using the computer system to perform the steps of; acquiring output generated for the wafer by an inspection system; separately altering the output generated for different locations on the wafer using a reference corresponding to the different locations on the wafer, wherein the output that is altered comprises output that does not correspond to defects on the wafer; and determining one or more characteristics of the wafer using the altered output, wherein the one or more characteristics comprise at least one characteristic that is not spatially localized in two dimensions.
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19. A system configured to determine one or more characteristics of a wafer, comprising:
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an inspection subsystem configured to generate output for the wafer; and a computer subsystem configured to; acquire the output; separately alter the output generated for different locations on the wafer using a reference corresponding to the different locations on the wafer, wherein the output that is altered comprises output that does not correspond to defects on the wafer; and determine one or more characteristics of the wafer using the altered output, wherein the one or more characteristics comprise at least one characteristic that is not spatially localized in two dimensions.
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Specification