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

Claim 0:
1. A carrier head, comprising:
a housing,
a support assembly having a support plate flexibly connected to the housing so as to be vertically movable relative to the housing;
at least one upper barrier that divides a volume between the support plate and the housing into a plurality of independently pressurizable first chambers to apply pressure on a top surface of the support plate in one or more first zones;
a plurality of fluid-impermeable barriers projecting from a bottom of the support plate to define a plurality of recesses that are open at bottom sides thereof, 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 the plurality of recesses, and wherein the barriers are positioned and configured such that when a planar substrate is loaded into the carrier head the barriers contact the substrate and divide a volume between the support plate and the substrate into a plurality of second chambers with each second zone corresponding to a second chamber from the plurality of second chambers 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
pneumatic control lines coupled to the plurality of recesses such that the plurality of second chambers are independently pressurizable.