Patent ID: 11897078
Assignee: EBARA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 6:
7. A polishing method for polishing a substrate by a polishing apparatus that is capable of referring to a storage in which a machine learning model is stored, the machine learning model being learned using learning data in which a feature amount of a signal regarding a frictional force between a polishing member and a substrate in polishing or a feature amount of a temperature of the polishing member or the substrate in polishing is input, and data regarding a film thickness of the polished substrate or a parameter related to yield of a product included in the polished substrate is output, the method comprising:
polishing the substrate by pressing the substrate against the polishing member while rotating the polishing table and the polishing head having the substrate attached thereto;
generating the feature amount by measuring the signal regarding the frictional force between the polishing member and the substrate in polishing or the temperature of the polishing member or a target substrate in polishing;
inputting the generated feature amount to the learned machine learning model;
outputting the data regarding the film thickness of the polished substrate or any of the parameters related to the yield of the product included in the polished substrate, as an estimated value; and
determining whether or not the output estimated value satisfies a predetermined polishing deterioration condition; and causing a film thickness measuring device to measure a film thickness of the polished target substrate when the output estimated value satisfies the predetermined polishing deterioration condition, and not to measure the film thickness of the polished target substrate when the output estimated value does not satisfy the predetermined polishing deterioration condition.