Patent ID: 9281253
Filing Date: 2016-03-08
CPC Classification: B24B,H01L

Claim Text:
1. A computer program product, tangibly encoded on a non-transitory computer readable media, including instructions to cause a data processing apparatus to: cause a first polishing station to polish a substrate; receive a first signal from a first eddy current monitoring system during polishing of the substrate at the first polishing station; determine an ending value of the first signal for an end of polishing of the substrate at the first polishing station; determine a first temperature at the first polishing station; after polishing the substrate at the first polishing station, cause a second polishing station to polish the substrate; receive a second signal from a second eddy current monitoring system during polishing of the substrate at the second polishing station; determine a starting value of the second signal for a start of polishing of the substrate at the second polishing station; determine a gain for the second polishing station based on the ending value, the starting value and the first temperature; for at least a portion of the second signal collected during polishing of at least one substrate at the second polishing station, calculate a third signal based on the second signal and the gain; and determine at least one of a polishing endpoint or an adjustment to a polishing parameter for the at least one substrate based on the third signal.