Patent ID: 9238295
Filing Date: 2016-01-19
CPC Classification: B24B,B24D,C08G

Claim Text:
1. A chemical mechanical polishing pad, comprising: a polishing layer having a polishing surface and a base surface, a counterbore opening, a through opening, an average thickness, T a plug in place endpoint detection window block having an average thickness, T a rigid layer having a top surface and a bottom surface; a hot melt adhesive interposed between the base surface of the polishing layer and the top surface of the rigid layer; wherein the hot melt adhesive bonds the polishing layer to the rigid layer; optionally, a pressure sensitive platen adhesive; wherein the pressure sensitive platen adhesive is disposed on the bottom surface of the rigid layer; optionally, a release liner; wherein the pressure sensitive platen adhesive is interposed between the bottom surface of the rigid layer and the optional release liner; wherein the polishing layer comprises the reaction product of ingredients, comprising: wherein the through opening extends through the polishing layer from the polishing surface to the base surface; wherein the counterbore opening opens on the polishing surface, enlarges the through opening and forms a ledge; wherein the counterbore opening has an average depth, D wherein the average depth, D wherein the plug in place endpoint detection window block is disposed within the counterbore opening; and wherein the plug in place endpoint detection window block is bonded to the polishing layer.