Patent ID: 11911870
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A method of polishing a substrate, comprising:
disposing a substrate in a polishing system;
urging a material surface of the substrate against a polishing pad, the polishing pad having a plurality of polishing elements formed of a pre-polymer composition the pre-polymer composition, comprising:
from about 40 wt % to about 50 wt % of a difunctional aliphatic urethane methacrylate, the difunctional aliphatic urethane methacrylate having a chain length within a range of about 2 to about 16 mer units and methacrylate end groups; and
from about 5 wt % to about 10 wt % of a difunctional aliphatic urethane acrylate oligomer having a chain length within a range of about 30 to about 200 mer units and acrylate end groups; and

operating the polishing system at a temperature of about 80° C. or greater, wherein a storage modulus (E′) of the pre-polymer composition at the operating temperature is about 200 MPa or greater and a glass transition temperature (Tg) of the pre-polymer composition is about 80° C. or more.