Patent ID: 9731397
Date: 2017-08-15
CPC Classifications: B24B

Claim:
1. A polishing pad for a chemical mechanical polishing apparatus, comprising: a polishing article having a polishing surface, a bottom surface and an aperture formed through the polishing article, the aperture including a first section adjacent the polishing surface and a second section farther from the polishing surface than the first section, wherein the polishing article includes a projection extending inwardly into the aperture such that the first section has a different lateral dimension from the second section, the projection having a laterally extending first surface located between a plane of the polishing surface and a plane of the bottom surface; a window having a first portion positioned in the first section of the aperture and a second portion extending from the first portion into the second section of the aperture, the window having a second surface substantially parallel to the first surface; a first adhesive adhering the first surface of the projection to the second surface of the window to secure the window to the projection; and a second adhesive of different material composition than the first adhesive, the second adhesive positioned laterally between the second portion of the window and a portion of the polishing article that is farther from the polishing surface than the first adhesive.