Patent ID: 8492277
Filing Date: 2013-07-23
Classification: C09G,H01L

Abstract:
1. A method for chemical mechanical polishing of a substrate, comprising: providing a substrate, wherein the substrate comprises polysilicon aid at least one of silicon oxide and silicon nitride; providing a chemical mechanical polishing composition, consisting of, as initial components: water; an abrasive; an acyclic organosulfonic acid compound, wherein the acyclic: organosulfonic acid compound has a formula R(EO) providing a chemical mechanical polishing pad with a polishing surface; moving the polishing surface relative to the substrate; dispensing the chemical mechanical polishing composition into the polishing surface; and abrading at least a portion of the substrate to polish the substrate; wherein at least some of the polysilicon is removed from the substrate; wherein at least some of the at least one of silicon oxide and silicon nitride is removed from the substrate; wherein the removal rate of the at least one of silicon oxide and silicon nitride is substantially unchanged by the addition of the acyclic organosulfonic acid compound to the chemical mechanical polishing composition; and, wherein the removal rate of the polysilicon is substantially lower as a result of the addition of the acyclic organosulfonic acid compound to the chemical mechanical polishing composition.