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

Claim 0:
1. An apparatus for substrate polishing comprising:
a housing member;
a carrier member coupled to the housing member, the carrier member forming at least a portion of a carrier volume;
a support plate disposed radially inside of the carrier volume and coupled to the carrier member; and
a substrate chuck element coupled to the support plate and 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 further 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.