Patent ID: 8088690

Claim:
A method of polishing a substrate comprising: (i) contacting a substrate comprising at least one metal layer comprising copper with a first chemical-mechanical polishing composition comprising: an abrasive, a surfactant, an oxidizer, an organic acid comprising polyacrylic acid or polymethacrylic acid, a corrosion inhibitor, and a liquid carrier; (ii) abrading at least a portion of the metal layer comprising copper to polish the substrate; (iii) contacting the abraded substrate from element (ii) with a second acrylate-free chemical-mechanical polishing composition comprising: an abrasive, a surfactant, an oxidizer, and a corrosion inhibitor, and a liquid carrier; and (iv) removing dendrites through abrasion that have formed on the substrate using the second acrylate-free chemical mechanical polishing composition.