Patent ID: 7524346
Filing Date: 2009-04-28
Classification: C09G,C23F,H01L

Abstract:
1. A combination of a chemical mechanical polishing composition in contact with a substrate surface having at least one feature thereon comprising a noble metal, said combination comprising: a) a substrate comprising submicron integrated circuits and having a surface having at least one feature thereon comprising a noble metal, said substrate surface contacting a chemical mechanical polishing composition comprising: b) periodic acid in an amount from about 0.05 to about 0.3 moles/kilogram and c) an abrasive; wherein said periodic acid and said abrasive are present in a combined amount sufficient to render the substrate surface substantially planar and to maintain a polishing rate of between 300 Angstroms per minute to about 2000 Angstroms per minute upon chemical-mechanical polishing thereof.