Patent ID: 6890245

Claim:
A chemical mechanical planarization system, comprising: a pair of drums, each of the pair of drums being configured to rotate; a polishing pad disposed around the pair of drums; a polishing head disposed above a top surface of the polishing pad, the polishing head being configured to hold a semiconductor wafer; a slurry dispenser for dispensing a slurry onto the top surface of the polishing pad; and a mixing manifold having a plurality of outlets configured to direct a pressurized spray of a chemistry onto a top surface of the polishing pad, the plurality of outlets being configured to match a concentration gradient across a wafer track defined on the polishing pad, the mixing manifold being configured to be coupled in flow communication with a chemical source and a source of pressurized gas, and the mixing manifold being disposed on a side of the polishing head that is opposite of a side on which the slurry dispenser is disposed.