Patent ID: 6575820
Filing Date: 2003-06-10
Classification: B08B,B24B,H01L

Abstract:
A chemical mechanical polishing apparatus, comprising:a platen having a polishing pad thereon; a wafer carrier for holding a wafer on the polishing pad, wherein the wafer carrier can move on to and off of the polishing pad; a dresser having a bottom disk with a diamond zone for contacting the polishing pad, the dresser moving between the polishing pad and a washer; the washer having a cleaning device comprising at least one scrubber disposed in a lower part of the washer and an ultrasonic device, wherein the scrubber scrapes residues existing in the diamond zone and the ultrasonic device agitates and removes residues existing in the diamond zone and on the scrubber; and wherein the diamond zone disposed on the bottom disk can clean the polishing pad, and the cleaning device can clean the diamond zone.