Patent ID: 11951587
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 16:
17. A system for performing chemical mechanical polishing (CMP) on a wafer; comprising:
a CMP platform; and
a controller operable to control the CMP platform in polishing the wafer until a first target thickness is reached, the controller being configured to:
identify a first zone and a second zone on a surface of the wafer, the first zone having a structure feature different from a structure feature of the second zone;
control the CMP platform in polishing the wafer with a first CMP process until the first target thickness is reached on the first zone, the first CMP process being selective to the structure feature of the second zone;
after the first target thickness is reached on the first zone, controlling the CMP platform to unload the wafer for a fabrication process different from CMP; and
control the CMP platform in polishing the wafer with a second CMP process until the first target thickness is reached on the second zone, the second CMP process being selective to the structure feature of the first zone.