Patent ID: 11911869
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 7:
8. A method for chemical mechanical polishing of a substrate, the method comprising:
(A) placing a substrate in contact with a polishing surface of a polishing pad supported on a rotating platen;
(B) providing polishing fluid between the substrate and the polishing surface;
(C) sensing a temperature of the polishing surface and providing sensed temperature information of the polishing surface to a PID controller;
(D) determining, by operation of the PID controller, if the temperature of the polishing surface is within a predefined temperature range; and
(E) providing an output from the PID controller to a flow controller, the flow controller having a supply inlet port, a return outlet port, a supply outlet port and a return inlet port; and two or more valves which includes a by-pass control valve, the flow controller operable to control the two or more valves, the two or more valves operable to control an amount of coolant flow between the supply inlet port and the return outlet port and provided to channels formed in the platen.