Patent ID: 8002611
Filing Date: 2011-08-23
Classification: B24B

Abstract:
1. A chemical-mechanical polishing pad comprising a circular disk having a polishing surface with an X-Y groove pattern; the polishing surface formed with X-direction grooves at chord positions equally spaced in the Y direction across substantially the entire polishing surface, with no X-direction grooves in an X-direction band portion covering at least a central region of the polishing surface and having a width that extends on either side of an X-direction diameter for a Y-direction distance greater than the X-direction groove equal spacing; and the polishing surface further being formed with Y-direction grooves at chord positions equally spaced in the X direction across substantially the entire polishing surface, with no Y-direction grooves in a Y-direction band portion covering at least the central region of the polishing surface and having a width that extends on either side of a Y-direction diameter for an X-direction distance greater than the Y-direction groove equal spacing.