Patent ID: 8197306

Claim:
An injector device for injecting slurry between a semiconductor wafer and a polishing pad of a chemical mechanical polishing tool, the injector device comprising: an injector top surface comprising one or more than one injector top surface opening; an injector bottom surface comprising multiple injector bottom surface openings, wherein the injector bottom surface faces a polishing pad top surface, and wherein the injector bottom surface rests on the polishing pad top surface; and an injector concave trailing edge, wherein the injector concave trailing edge is fitted to the size and shape of a leading edge of a polishing head of the chemical mechanical polishing tool; wherein a CMP slurry introduced through the one or more than one injector top surface openings travels through a channel in the injector device and exits the injector device through the multiple injector bottom surface openings onto the polishing pad top surface; and wherein the injector device is attached to a rod with a spring and a collar to assure contact with the polishing pad top surface, and wherein the injector device is gimbaled so that it moves freely to the extent permitted by the polishing pad top surface.