Patent ID: 8870626
Filing Date: 2014-10-28
Classification: B24B

Abstract:
1. A polishing pad used in conjunction with a carrier ring to polish a substrate, the polishing pad having a motion direction when polishing, wherein the carrier ring has at least one carrier groove and the substrate has a substrate radius, the polishing pad comprising: a polishing layer; and a surface pattern disposed in the polishing layer, the surface pattern having a plurality of traversing grooves, a tangent line of each of the traversing grooves and a tangent line of the motion direction including a non-zero angle, and each of the traversing grooves having a traversing groove trajectory corresponding to the motion direction, wherein the traversing groove trajectory is a region where each of the traversing grooves passes by when the polishing pad moves in the motion direction, and each of the traversing groove trajectories having a trajectory width smaller than the substrate radius, wherein in a leading region of the carrier ring corresponding to the motion direction, the traversing grooves have at least one carrier compatible groove, and the at least one carrier compatible groove aligns with the at least one carrier groove.