Patent ID: 7520796
Filing Date: 2009-04-21
Classification: B24B,B24D

Abstract:
1. A polishing pad for use in conjunction with a carrier ring having at least one carrier groove and a leading edge relative to the polishing pad when the polishing pad and carrier ring are being used for polishing at least one of a magnetic, optical and semiconductor substrate in the presence of a polishing medium, the at least one carrier groove having an orientation relative to the carrier ring, the polishing pad having a radius extending from a center of the polishing pad and the radius having a length, the polishing pad comprising: a) a polishing layer configured for polishing at least one of a magnetic, optical and semiconductor substrate in the presence of a polishing medium, the polishing layer including a circular polishing surface having an annular polishing track during polishing; and b) at least one pad groove having a carrier-compatible groove shape with a continuous groove trajectory within the polishing track with at least a portion of the carrier-compatible groove shape being curved radial and the carrier-compatible groove shape being tangent to a radius of the polishing pad in at least one location along the length of the radius, the carrier-compatible groove shape with a continuous groove trajectory determined as a function of the orientation of the at least one carrier groove so that the at least one carrier groove aligns with the at least one pad groove at a multitude of locations along the carrier-compatible groove shape when the at least one carrier groove is on the leading edge of the carrier ring during polishing.