Patent ID: 11931853
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G  H | IPC B  G

Claim 10:
11. A method for generating a recipe for controlling a polishing system, the method comprising:
receiving a target removal profile that includes a target thickness to remove for a plurality of locations on a substrate that are angularly distributed around a center of the substrate;
storing a first function defining a polishing rate for a zone from a plurality of pressurizable zones of a carrier head that are angularly distributed at different angular positions around a center of the carrier head, the first function defining the polishing rate for the zone as a function of one or more pressures of one or more zones from the plurality of pressurizable zones of the carrier head; and
for each particular zone of the plurality of zones, calculating a recipe defining a pressure for the particular zone over time by calculating an expected thickness profile after polishing using the first function and minimizing a cost function that incorporates a first term representing a difference between the expected thickness profile and a target thickness profile, wherein an output of the minimization of the cost function is a scalar quantity representing a summed removal error.