Patent ID: 11931857
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 15:
16. A method of polishing a substrate, comprising:
bringing a substrate held by a carrier head into contact with a polishing pad such that a plurality of fluid-impermeable barriers that project from a bottom of a support plate in the carrier head contact the substrate and divide a volume between the support plate and the substrate into a plurality of independently pressurizable second chambers;
controlling pressure in a plurality of independently pressurizable first chambers defined by at least one upper barrier between the support plate and a housing of the carrier head so as to control flexure of the support plate in a plurality of first zones, wherein a region below each first zone is divided by the fluid-impermeable barriers into a plurality of second zones, with each second zone corresponding to a recess from a plurality of recesses at a bottom side of the fluid-impermeable barriers and at least one second zone of the plurality of second zones being entirely below an associated first zone of the plurality of first zones; and
controlling pressure in the plurality of independently pressurizable second chambers below the support plate.