Patent ID: 7049237
Filing Date: 2006-05-23
Classification: C09G,C23F,H01L

Abstract:
1. A planarization method comprising: positioning a Group VIII metal-containing surface of a substrate to interface with a polishing surface, wherein the Group VIII metal is selected from the group consisting of rhodium, iridium, ruthenium, osmium, palladium, platinum, and combinations thereof, and further wherein the substrate surface comprises one or more materials containing one or more other metals; supplying an acidic planarization composition in proximity to the interface; feeding an oxidizing gas into the planarization composition; and planarizing the Group VIII metal-containing surface to selectively remove the Group VIII metal-containing surface relative to materials containing other metals at a selectivity ratio of at least 10:1; wherein the oxidizing gas is selected from the group consisting of oxygen, air, nitrous oxide, nitric oxide, sulfur trioxide, and combinations thereof; wherein the polishing surface comprises a fixed abrasive article or a polishing pad; and wherein when the polishing surface comprises the polishing pad the planarization composition comprises a plurality of abrasive particles having a hardness of no greater than 9 Mohs.