Patent ID: 9108292
Filing Date: 2015-08-18
Classification: B24B

Abstract:
1. A method of obtaining a sliding-distance distribution of a dresser sliding on a polishing member for polishing a substrate, the method comprising: calculating a relative speed between the dresser and the polishing member at a predetermined sliding-distance calculation point on the polishing member; calculating an increment of a sliding distance of the dresser at the sliding-distance calculation point by multiplying the relative speed by a contact time during which the dresser contacts the polishing member at the sliding-distance calculation point; correcting the increment of the sliding distance by multiplying the calculated increment of the sliding distance by at least one correction coefficient; updating the sliding distance by adding the corrected increment of the sliding distance to a current sliding distance at the sliding-distance calculation point; and producing a sliding-distance distribution of the dresser from the updated sliding distance and a position of the sliding-distance calculation point, wherein the at least one correction coefficient includes an unevenness correction coefficient provided for the sliding-distance calculation point, wherein the unevenness correction coefficient is a correction coefficient that allows a profile of the polishing member to reflect a difference between an amount of scraped material of the polishing member in a raised portion and an amount of scraped material of the polishing member in a recess portion, and wherein the correcting of the increment of the sliding distance comprises correcting the increment of the sliding distance by multiplying the increment of the sliding distance by the unevenness correction coefficient.