Methods and apparatus for local outlier detection
First Claim
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1. A data analysis system for semiconductor test data, comprising a computer system, wherein the computer system is configured to operate:
- a local outlier identification system configured to;
select a data subset from the semiconductor test data corresponding to a spatially-related subgroup of components on a substrate, wherein the spatially-related subgroup of components comprises a group of adjacent components within an area defined on the substrate that is fewer than all of the components on the substrate; and
automatically identify a local outliers in the data subset, wherein the local outlier comprises an outlier relative to the selected data subset.
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Abstract
A method and apparatus for data analysis according to various aspects of the present invention is configured to identify statistical outliers in test data for components, including local outliers representing outliers within subsets of larger data populations.
28 Citations
40 Claims
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1. A data analysis system for semiconductor test data, comprising a computer system, wherein the computer system is configured to operate:
a local outlier identification system configured to; select a data subset from the semiconductor test data corresponding to a spatially-related subgroup of components on a substrate, wherein the spatially-related subgroup of components comprises a group of adjacent components within an area defined on the substrate that is fewer than all of the components on the substrate; and automatically identify a local outliers in the data subset, wherein the local outlier comprises an outlier relative to the selected data subset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A data analysis system for semiconductor test data, comprising a computer system, wherein the computer system is configured to operate:
a local outlier identification system configured to; select test data for a spatially-related subgroup of components on a selected wafer, wherein the spatially-related subgroup of components comprises a group of adjacent components within an area defined on the wafer that is fewer than all of the components on the selected wafer; and identify local outliers in the selected test data, wherein the local outliers comprise an outlier relative to the selected test data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A test data analysis system for analyzing test data for a set of components fabricated and tested using a fabrication process, comprising:
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a memory for storing the test data; and a local outlier identification system having access to the memory and configured to; select a portion of the test data corresponding to a group of spatially-related components on a single substrate comprising a group of adjacent components within a defined area on the single substrate that is fewer than all of the components on the substrate; and identify local outliers in the selected portion, wherein the local outliers comprise an outlier relative to the selected portion of the test data. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A computer-implemented method for testing components on a selected substrate fabricated and tested according to a fabrication process, comprising:
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obtaining test data for the components; selecting a subset of the test data corresponding to a spatially-related subgroup of components on the selected substrate, wherein the subgroup comprises a group of adjacent components within a defined area on the substrate that is fewer than all of the components on the substrate; automatically identifying local outliers in the selected subset of test data, wherein the local outliers comprise an outlier relative to the selected subset of the test data; and storing information identifying the outliers in a computer readable medium. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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33. A non-transitory computer-readable medium storing instructions executable by a computer, wherein the instructions cause the computer to execute a method for analyzing test data comprising:
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obtaining test data for the components on a selected substrate; selecting a portion of the test data corresponding to geographically-related components on the selected substrate, wherein the selected portion comprises a group of adjacent components within a defined area on the substrate that corresponds to fewer than all of the components on the selected substrate; and identifying a local outlier in the selected portion of the test data, wherein the local outliers comprise an outlier relative to the selected portion of the test data. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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Specification