Patent ID: 9446498
Filing Date: 2016-09-20
CPC Classification: B24B

Claim Text:
1. A chemical mechanical polishing pad, comprising: a polishing layer having a central axis, an outer perimeter, a polishing surface, a base surface and a polishing layer thickness, T an endpoint detection window having a polishing side, a platen side and a window thickness, T a subpad having a top surface, a bottom surface, a plurality of cross members, a plurality of apertures, an outer edge and a subpad thickness, T a stack adhesive; wherein the endpoint detection window is incorporated into the chemical mechanical polishing pad, wherein the polishing side is disposed toward the polishing surface of the polishing layer; wherein the stack adhesive is interposed between the base surface of the polishing layer and the top surface of the subpad; wherein the plurality of apertures is in optical communication with the endpoint detection window; and, wherein the polishing surface of the polishing layer is adapted for polishing of a substrate.