Patent ID: 6997777
Filing Date: 2006-02-14
Classification: B24D

Abstract:
1. A method of forming a chemical-mechanical polishing pad having at least one optically transmissive region comprising: (i) providing a polishing pad with a body comprising an aperture, (ii) inserting an optically transmissive window into the aperture of the body of the polishing pad, and (iii) bonding the optically transmissive window to the body of the polishing pad by ultrasonic welding to form a polishing pad having the optically transmissive window; wherein (a) the body of the polishing pad comprises a thermosetting polymer resin and the optically transmissive window comprises a thermoplastic polymer resin or (b) the body of the polishing pad comprises a thermoplastic polymer resin and the optically transmissive window comprises a thermosetting polymer resin.