Patent ID: 9221149
Filing Date: 2015-12-29
Classification: B24B,H01L

Abstract:
1. A method of polishing at least one semiconductor wafer in a gap of a polishing device between a lower polishing plate, covered with a lower polishing pad, and an upper polishing plate, covered with an upper polishing pad, while supplying a polishing agent, the polishing plates and the polishing pads having an inner edge and an outer edge, the method comprising: dressing a first of the upper and lower polishing pads using a dressing tool, the dressing including rotating the respective polishing plate covered with the first polishing pad, the dressing tool being mounted in the gap in such a way that it extends from the inner edge to the outer edge of the first polishing pad, and a distance between the dressing tool and a second of the upper and lower polishing pads at the inner edge of the second polishing pad differing from a corresponding distance at the outer edge of the second polishing pad; and simultaneous double-side polishing the at least one semiconductor wafer in the gap after the dressing.