Patent ID: 11919126
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A method for performing chemical mechanical planarization (CMP), comprising:
removing a platen assembly from a platen housing, wherein the platen housing comprises:
a first opening comprising a first diameter, and
a second opening continuous with the first opening, the second opening comprising a second diameter different than the first diameter, wherein the platen assembly comprises an upper platen that conforms with the first opening and a lower platen that conforms with the second opening;

inserting a monolithic platen into the platen housing to replace the platen assembly, wherein the monolithic platen fits within contours of the platen housing, and wherein the monolithic platen is formed as one piece, wherein the monolithic platen comprises:
a first portion within the first opening, and
a second portion within the second opening, wherein the first and second portions have different diameters.