Patent ID: 8257143

Claim:
A method for polishing an object by pressing a polishing pad against a surface of the object while moving the polishing pad and the object relative to each other, said method comprising: carrying out a first polishing step by pressing a polishing pad of a polishing device against the surface of the object at a first pressure while moving the polishing pad and the object relative to each other at a first relative speed, wherein the polishing pad used in the first polishing step has a diameter which is smaller than a radius of the object; carrying out a termination step of terminating the first polishing step at a point in time when a surface level difference in the object is eliminated to a targeted level; and carrying out a second polishing step by pressing a polishing pad of a polishing device against the surface of the object at a second pressure which is different from the first pressure while moving the polishing pad and the object relative to each other at a second relative speed which is different from the first relative speed, wherein the polishing pad used in the second polishing step has a diameter which is larger than a diameter of the object.