Patent ID: 11904429
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. An apparatus for substrate polishing comprising:
a substrate support carrier configured to be disposed over a polishing pad and comprising:
a housing member;
a carrier member coupled to the housing member and forming a portion of a carrier volume inside of the carrier member;
a support plate disposed inside of the carrier member and the carrier volume; and
a substrate chuck element comprising:
a first membrane comprising a plurality of channel regions; and
a second membrane coupled to a bottom surface of the first membrane, the second membrane comprising a rigid portion and a soft portion, the rigid portion disposed between the soft portion and first membrane, the rigid portion comprising an extension member disposed radially outward of the soft portion, wherein the rigid portion has a first hardness and the soft portion has a second hardness less than the first hardness, a portion of the rigid portion surrounding a part of the soft portion and extending radially outward of the soft portion of the second membrane and the first membrane, wherein the rigid portion includes an outer surface configured to contact an inner surface of a retaining ring when the substrate chuck element moves within the carrier volume.