Determining process condition in substrate processing module
First Claim
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1. A method for determining a condition of a process in a substrate processing module, comprising:
- obtaining a first set of time-series data from measurement of a process parameter during a first occurrence of the process in the substrate processing module;
obtaining at least a second set of time-series data from measurement of the process parameter during at least a second occurrence of the process in the substrate processing module;
identifying a structure corresponding to a first portion of the first set of time-series data, the structure selected from a finite set of structures;
identifying a first portion in each set of the at least a second set of time series data that corresponds to the structure;
deriving a composite model from the first portion of the first set of time-series data and the first portion of each set of the at least a second set of time series data;
obtaining a third set of time-series data from measurement of the process parameter during a third occurrence of the process in the substrate processing module;
determining a degree of correlation between a first portion of the third set of timeseries data and the composite model; and
determining a condition of the process based on the degree of correlation.
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Abstract
A sensor network collects time-series data from a process tool and supplies the data to an analysis system where pattern analysis techniques are used to identify structures and to monitor subsequent data based on analysis instructions or a composite model. Time-series data from multiple process runs are used to form a composite model of a data structure including variation. Comparison with the composite model gives an indication of tool health. A sensor network may have distributed memory for a more simplified configuration.
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11 Claims
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1. A method for determining a condition of a process in a substrate processing module, comprising:
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obtaining a first set of time-series data from measurement of a process parameter during a first occurrence of the process in the substrate processing module; obtaining at least a second set of time-series data from measurement of the process parameter during at least a second occurrence of the process in the substrate processing module; identifying a structure corresponding to a first portion of the first set of time-series data, the structure selected from a finite set of structures; identifying a first portion in each set of the at least a second set of time series data that corresponds to the structure; deriving a composite model from the first portion of the first set of time-series data and the first portion of each set of the at least a second set of time series data; obtaining a third set of time-series data from measurement of the process parameter during a third occurrence of the process in the substrate processing module; determining a degree of correlation between a first portion of the third set of timeseries data and the composite model; and determining a condition of the process based on the degree of correlation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification