Patent ID: 8046193

Claim:
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.