Patent ID: 6913525

Claim:
A CMP (chemical mechanical polishing) apparatus which polishes an object by pressing a polishing pad against the object and by swinging the polishing pad while rotating both the object and the polishing pad so that relative movement occurs between the polishing pad and the object, wherein the CMP apparatus comprises: a polishing pad having a width that is smaller than the diameter of the object, and having an outer circumferential portion shaped so that a contact time between the polishing pad and a peripheral portion of the object is lessened, and whose shape is such that in all points on a surface of the object, a product of three values—i.e., an integrated value of a relative linear velocity, an integrated value of a pressure, and an integrated value of the contact time between the polishing pad and the object during polishing, is within +30% of the mean value of the product of the three integrated values at all points on the surface of the object.