Patent ID: 11865664
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 17:
18. A method of controlling polishing, comprising:
polishing a stack of adjacent layers on a substrate, the stack of adjacent layers including an outer layer and an underlying layer;
measuring with an in-situ monitoring system a sequence of characterizing values for the substrate during polishing;
executing simultaneously on a controller a plurality of software instances of a profile control algorithm, each software instance performing the same profile control algorithm, the plurality of instances including a first instance and a second instance having different values for a control parameter, wherein the first instance of the profile control algorithm receives the sequence of characterizing values during an initial time period, and the second instance of the profile control algorithm receives the sequence of characterizing values during the initial time period and a subsequent time period;
for the initial time period, controlling one or more polishing parameters using the first instance of the profile control algorithm based on the sequence of characterizing values received during the initial time period;
detecting exposure of the underlying layer based on the sequence of characterizing values from the in-situ monitoring system; and
for the subsequent time period after detecting the exposure of the underlying layer, controlling one or more polishing parameters using the second instance of the profile control algorithm based on the sequence of characterizing values received during the initial time period and the subsequent time period.