Patent ID: 11904430
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. An apparatus comprising:
a polishing platen;
a polishing pad over the polishing platen;
a pad conditioner configured to condition the polishing pad, wherein the pad conditioner comprises:
a first channel therein; and
a second channel therein, wherein the first channel is separated from the second channel; and

a control unit configured to control polishing pad temperatures during polishing a wafer, and the control unit is configured to:
in a first stage in the polishing the wafer, in response to a first measured temperature of the polishing pad, supplying a heating media into the first channel;
in a second stage in the polishing the wafer, in response to a second measured temperature of the polishing pad, supplying a cooling media into the second channel, wherein the second measured temperature is equal to or lower than the first measured temperature; and
in a third stage in the polishing the wafer, in response to a third measured temperature of the polishing pad in a pre-set temperature range, conducting additional heat-exchange medias into both of the first channel and the second channel, wherein the additional heat-exchange medias have temperatures substantially the same as the third measured temperature.