Patent ID: 9362186
Filing Date: 2016-06-07
CPC Classification: B24B,H01L

Claim Text:
1. A computer program product, encoded on one or more non-transitory computer storage media, comprising instructions that when executed by one or more computers cause the one or more computers to perform operations comprising: storing a base measurement, the base measurement being an eddy current measurement of a substrate after deposition of at least one layer overlying a semiconductor wafer and before deposition of a conductive layer over the at least one layer; after deposition of the conductive layer over the at least one layer and during polishing of the conductive layer on substrate, receiving a sequence of raw measurements of the substrate from an in-situ eddy current monitoring system; normalizing each raw measurement in the sequence of raw measurements to generate a sequence of normalized measurements using the raw measurement and the base measurement; and determining at least one of a polishing endpoint or an adjustment for a polishing rate based on at least the sequence of normalized measurements.