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

Claim 0:
1. An apparatus for polishing configured to polish an object by using a polishing pad having a polishing surface, the apparatus comprising:
a polishing table provided to be rotatable and configured to support and rotate the polishing pad;
a holder configured to hold the object and press the object against the polishing pad;
a polishing solution supply device provided with a plate-like contact member and configured to supply a polishing solution to an opening in a bottom face of the contact member in a state that the contact member comes into contact with or is adjacent to the polishing pad, thereby spreading the polishing solution on the polishing pad, the polishing solution supply device causing at least part of used polishing solution returned by rotation of the polishing pad to be dammed up by the contact member and setting the contact member either in a direction of keeping the dammed up polishing solution on the polishing pad or in a direction of 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;
an arm linked with the polishing solution supply device at one end of the arm;
a motor fixed to the one end of the arm and including a rotating shaft to which the polishing solution supply device is directly or indirectly fixed, the rotating shaft being perpendicular to the polishing surface, the motor configured to rotate the polishing solution supply device with respect to the arm and parallel to the polishing surface; and
a controller configured to control the motor to change the angle of the polishing solution supply device with respect to the radial direction of the polishing pad and thereby control a discharge amount of the polishing solution by the contact member of the polishing solution supply device.