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

Claim 0:
1. A method of performing chemical mechanical polishing (CMP) on a wafer, comprising:
identifying 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;
achieving a first CMP target thickness on the first zone by polishing the wafer using a first CMP process;
removing a first structure feature having a first material from the second zone to generate a recess;
filling the recess with a second material that is different from the first material; and
after the filling the recess, achieving the first CMP target thickness on the second zone by polishing the wafer using a second CMP process.