Patent ID: 6527622
Filing Date: 2003-03-04
Classification: B24B,C09G,C09K,C23F,H01L

Abstract:
A method of polishing a substrate comprising:(i) contacting a substrate comprising a noble metal with a chemical-mechanical polishing system comprising: (a) an abrasive and/or polishing pad, (b) a liquid carrier, and (c) one or more polishing additives selected from the group consisting of diketones, diketonates, urea compounds, heterocyclic nitrogen-containing compounds, heterocyclic oxygen-containing compounds, heterocyclic phosphorus-containing compounds, nitrogen-containing compounds that can be zwitterionic compounds, salts thereof, and combinations thereof, wherein the chemical-mechanical polishing system has a pH of about 2 to about 12, and (ii) abrading at least a portion of the substrate to polish the substrate, wherein the noble metal is selected from the group consisting of platinum, iridium, rhenium, ruthenium, rhodium, palladium, silver, osmium, gold, alloys thereof, and oxides thereof.