Patent ID: 7662028

Claim:
A polishing pad having a groove structure for avoiding stripping of a polishing surface of the polishing pad, comprising: a base material, having a surface; and a grinding layer, disposed on a part of the surface and exposing a part of the surface around an edge of the base material, wherein the grinding layer has a plurality of first grooves and a plurality of second grooves, the first grooves cross the second grooves to define a plurality of grinding areas, and the exposed part of the surface around the edge of the base material includes areas of the first grooves and the second grooves around the edge of the base material and areas that are not covered by the grinding areas located between the first grooves around the edge of the base material, the second grooves around the edge of the base material, and the edge of the base material, wherein some of the exposed areas occur at the edge of the pad where the first grooves and second grooves do not intersect at the edge of the pad.