Patent ID: 11885682
Assignee: VERITY INSTRUMENTS, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 21:
22. A system for identifying anomalous signals, comprising:
a processing tool; and
an apparatus that receives optical data from a semiconductor process performed within the processing tool and converts the optical data to spectral data, the apparatus including:
a memory having operating instructions corresponding to an algorithm for identifying one or more anomalous signals; and
one or more processors configured to perform one or more operations according to the operating instructions, including:
receiving temporally separated spectral data samples; and
identifying the one or more anomalous signals in an intermediate one of the temporally separated spectral data samples based on at least one preceding and at least one subsequent ones of the spectral data samples, wherein the identifying includes comparing a difference, which is between elements of the intermediate one of the temporally separated spectral data sample and a mean of corresponding elements of the at least one preceding and at least one subsequent ones of the spectral data samples, to an intensity threshold value corresponding to a number of counts.