Patent ID: 9138858
Filing Date: 2015-09-22
Classification: B24B

Abstract:
1. A polishing pad, comprising: a polishing layer having a polishing surface, an aperture extending entirely through the polishing layer, and a plurality of grooves in the polishing surface that extend partially but not entirely through the polishing layer, the plurality of grooves forming a uniform pattern on the polishing surface, wherein the aperture has edges where side walls of the aperture intersect the polishing surface, wherein the plurality of grooves forming the uniform pattern includes grooves that intersect the aperture and grooves that do not intersect the aperture, and wherein the plurality of grooves are narrower than the aperture; and a solid light-transmitting window filling the aperture and molded to the polishing layer, the window having a top surface coplanar with the polishing surface, and wherein a portion of the window projects laterally past the edges of the aperture into the grooves that intersect the aperture and is molded to the grooves that intersect the aperture.