Patent ID: 8771540

Claim:
A method of preparing a chemical mechanical polishing slurry, comprising: adding water and oxidizer to a concentrate, wherein said concentrate comprises: about 0.5 wt % to about 10 wt %, based on the total weight of the concentrate, of an abrasive; about 1 wt % to about 20 wt %, based on the total weight of the concentrate, of a complexing agent; and a corrosion inhibitor, wherein said water and said oxidizer are added to said concentrate in an amount governed by the formula: 0.8≦[oxidizer]/ f≦ 2.0, wherein ƒ=A+B*[complexing agent] C , wherein A is between 0.35 and 0.8, B is between 0.3 and 0.5, and C is about 1, and [oxidizer] and [complexing agent] are the amounts of the oxidizer and complexing agent in the chemical mechanical polishing slurry, respectively, to form the chemical mechanical polishing slurry.