Patent ID: 8808061

Claim:
A method for dressing pads of a work polishing apparatus, which includes an upper polishing plate having a lower face, on which the polishing pad is fixed, and a lower polishing plate having an upper face, on which the polishing pad is fixed, and in which a work is sandwiched between the polishing pads of the both rotating polishing plates and polished with supplying slurry to the polishing pads, by using a dressing grind stone, after polishing the work; said method being performed in a dressing apparatus, comprising: a moving member, which is capable of reciprocally moving in a space between the both polishing plates and in the radial direction of the polishing pads; a driving unit for reciprocally moving the moving member in the radial direction of the polishing pads; a cleaning unit including nozzels, which are respectively provided to an upper side and a lower side of the moving member and capable of respectively spraying high-pressure cleaning water toward the polishing pads of the upper polishing plate and the lower polishing plate; a dressing unit including the dressing grind stones, which are respectively provided to the upper side and the lower side of the moving member, respectively biased toward and pressed onto the polishing pads of the upper polishing plate and the lower polishing plate by biasing members, capable of inclining in the radial direction of the polishing pads and capable of inclining and following surface profiles of the polishing pads, with the movement of the moving member in the radial direction of the polishing pads, so as to dress the polishing pads; and a control unit for controlling actions of the driving unit and the cleaning unit so as to make the dressing unit dress the polishing pads while the cleaning unit cleans the polishing pads, said method comprising the steps of: rotating the upper polishing plate and the lower polishing plate and moving the moving member reciprocally in the radial direction of the polishing pads after polishing the work; and simultaneously dressing the polishing pads of the upper polishing plate and the lower polishing plate by moving the dressing grind stones in the radial direction of the polishing pads with inclining and following the surface profiles of the polishing pads, and simultaneously cleaning the polishing pads of the upper polishing plate and the lower polishing plate by supplying the high-pressure cleaning water from the nozzles to the polishing pads.