Patent ID: 8506831
Filing Date: 2013-08-13
Classification: C09G,H01L

Abstract:
1. A combination of a chemical mechanical polishing composition in contact with a substrate surface having at least one feature thereon comprising tungsten and at least one feature thereon comprising a dielectric material, said combination comprising: a substrate comprising submicron integrated circuits and having a surface having at least one feature thereon comprising tungsten, said substrate surface contacting a chemical mechanical polishing composition comprising; 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 removal rate of tungsten of at least 800 Angstroms per minute upon chemical-mechanical polishing thereof when polishing is done at 4 psi of down force; and a tunable tungsten/dielectric selectivity ranging from 0.5 to 1.5 is realized upon chemical-mechanical polishing the substrate using the composition.