Patent ID: 11865671
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A chemical mechanical polishing apparatus comprising:
a platen to hold a polishing pad;
a rotatable carrier head to hold a substrate against a polishing surface of the polishing pad during a polishing process, the carrier head laterally movable by a first actuator across the polishing pad and rotatable by a second actuator;
a thermal control system including one or more independently controllable heaters and/or coolers to independently control temperatures of at least one zone of a plurality of zones on the polishing pad relative to another zone of the plurality of zones; and
a controller configured to cause the thermal control system to generate a first zone having a first temperature and a second zone having a different second temperature, the controller further configured to
control the first actuator and the second actuator to synchronize lateral oscillation of the carrier head with rotation of the carrier head such that over each of a plurality of successive oscillations of the carrier head, a first angular swath of an annular edge portion of the substrate contacts the first zone when the first angular swath is at an azimuthal angle about an axis of rotation of the carrier head, and when a second angular swath of the annular edge portion of the substrate is at the azimuthal angle the second angular swath contacts the second zone, the first angular swath and the second angular swath being different arc portions of the annular edge portion.