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

Claim 14:
15. An apparatus comprising:
a polishing platen;
a polishing pad over the polishing platen;
a wafer holder configured to rotate a wafer against the polishing pad, with the wafer contacting the polishing pad, wherein the wafer holder comprises a channel and an additional channel therein, with the channel and the additional channel being configured to have a heat-exchange media flowing through;
a heat-exchange supplying unit connected to the channel; and
a control unit configured to control a flow status of the heat-exchange media in the channel in response to surface temperatures of the polishing pad, wherein the control unit is configured to:
in response to a first temperature of the polishing pad lower than a pre-set temperature range, turning on conduction of a heating media from the heat-exchange supplying unit into the channel; and
in response to a second temperature of the polishing pad higher than the pre-set temperature range, turning on conduction of a cooling media from the heat-exchange supplying unit into the additional channel; and
in response to a third temperature of the polishing pad in the pre-set temperature range, conducting additional heat-exchange medias other than the heating media and the cooling media into both of the channel and the additional channel, wherein the additional heat-exchange medias have temperatures substantially the same as the third temperature.