Patent ID: 8906123

Claim:
A system for chemical mechanical polishing comprising: a semiconductor substrate having at least a barrier layer comprising a noble metal selected from the group consisting of ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt), silver (Ag), gold (Au), alloys thereof, oxides thereof, and combinations thereof; a rotating polishing pad attached to a platen; a chemical mechanical planarization polishing composition having a pH which is basic, comprising: a) an abrasive; b) a cyanate salt; and c) an oxidizing agent containing at least one peroxy-functional group; wherein the chemical mechanical planarization polishing composition is (a) placed between the barrier layer and the rotating polishing pad; and (b) in contact with at least the noble metal and the rotating polishing pad wherein the rotating polishing pad is able to polish at least the noble metal of the barrier layer.