Patent ID: 11969855
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B

Claim 0:
1. A method of controlling polishing, comprising:
polishing a substrate at a polishing station;
during polishing monitoring the substrate with an in-situ monitoring system, the monitoring including generating a signal from a sensor, the signal including a sequence of measured values;
filtering the signal to generate a filtered signal, the filtered signal including a sequence of adjusted values, the filtering including
modelling a plurality of periodic disturbances at a plurality of different frequencies,
modelling an underlying signal, and
applying a linear prediction filter to the modelled underlying signal with the modelled plurality of periodic disturbances to generate the filtered signal representing the underlying signal with the periodic disturbances filtered out; and

causing the polishing system to at least one of halt polishing of the substrate or adjust a polishing rate of the substrate based on the filtered signal.