Patent ID: 6821187
Filing Date: 2004-11-23
Classification: C09G,C23F,H01L

Abstract:
A method for chemical-mechanical polishing of a layer on a substrate, said layer being composed of a metal selected from a group consisting of platinum metals, the method comprising the steps of preparing on a substrate a layer composed of a metal selected from the group consisting of platinum metals; preparing a polishing fluid containing 1 through 6 wt % of abrasive particles having a Mohs hardness of at least 9, 2 through 20 wt % of at least one oxidation agent selected from the group consisting of Ce(IV) salts, salts of chloric acid, salts of peroxodisulfiric acid, salts of hydrogen peroxide and hydrogen peroxide, and 74 through 97 wt % water; and chemical-mechanically polishing the layer of metal with the assistance of the polishing fluid.