Patent ID: 7731569
Filing Date: 2010-06-08
Classification: B24B

Abstract:
1. A pad preparation method for conditioning a surface of a polishing pad made of foamed polyurethane which is used in a polishing apparatus for polishing works to optimize the surface as an initial state for polishing, comprising the steps of: providing a pad conditioner having a bunch of wires which are bending or deflecting or elastic members having such a flexible length that enables tip ends of the wires to contact the polishing pad at a constant pressure despite variations in height of the pad; and a supporting section to support a base end of the bunch of wires, wherein said supporting section comprises a circular plate from which the bunch of wires extend in the manner of a brush, a first supporting body for fixing the base ends of the wires thereto, and a second supporting body which has a plurality of holes through which the wires pass and which is mounted to the first supporting body in a manner enabling it to move toward and away from the first supporting body for limiting the position of the wires in a plane parallel to the polishing pad thereby adjusting the effective flexible length of the wires, and scraping the surface of the polishing pad to roughen the surface of the polishing pad by rotating the pad conditioner on the polishing pad.