POLISHING DISK WITH END-POINT DETECTION PORT

摘要

The invention provides a polishing disk (10) comprising (a) a body comprising a front surface (11), a back surface (12), and a peripheral surface (13), (b) a polishing surface, (c) an end-point detection port (15) extending through the body from the front surface to the back surface, and (d) a drainage channel (16) in fluid communication with the end-point detection port (15). The invention further provides a method of preparing such a polishing disk and a method of polishing a substrate with such a polishing disk.