Patent ID: 11926018
Assignee: EBARA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. A method of polishing an object by using a polishing pad having a polishing surface and a polishing solution supply device linked with an arm at one end of the arm and placed on the polishing pad, the method of polishing comprising:
supplying a polishing solution to an opening in a bottom face of a plate-like contact member of the polishing solution supply device to spread the polishing solution on the polishing pad in a state that the contact member comes into contact with or is adjacent to the polishing pad, causing at least part of used polishing solution returned by rotation of the polishing pad to be dammed up by the contact member, and keeping the dammed up polishing solution on the polishing pad and/or discharging the dammed up polishing solution, according to an angle of the polishing solution supply device with respect to a radial direction of the polishing pad; and
controlling a discharge amount of the polishing solution by changing an angle of the polishing solution supply device with respect to the radial direction of the polishing pad and/or a position of the polishing solution supply device on the polishing pad, at least at a time of a pre-supply that supplies the polishing solution to the polishing pad prior to polishing of the object, or during polishing of the object, wherein changing the angle of the polishing solution supply device with respect to the radial direction of the polishing pad and/or the position of the polishing solution supply device on the polishing pad includes rotating a rotating shaft of a motor fixed to the one end of the arm, the rotating shaft being perpendicular to the polishing surface, thereby to rotate the polishing solution supply device fixed directly or indirectly to the rotating shaft, with respect to the arm and parallel to the polishing surface.