Patent ID: 6109775
Filing Date: 2000-08-29
Classification: H01L

Abstract:
A method of improving a uniformity of the planarization of a polishable material using chemical mechanical polishing, comprising the steps of:forming a first set of working lines and a polishable material in a first region of a substrate, wherein said first region includes a first density of said first set of working lines, and wherein the chemical mechanical polishing rate for said polishable material in said first region is a function of said first density of said first set of working lines;forming a second set of working lines and said polishable material in a second region of said substrate, wherein said second region includes a second density of said second set of working lines less than said first density, and wherein the chemical mechanical polishing rate of said polishable material in said second region is a function of said second density of said second set of working lines; andforming at least one dummy line in said second region wherein said second region includes an increased second density of lines comprised of said at least one dummy line and said second set of working lines, in a manner that said first and increased second densities of lines are better matched to better equalize the chemical mechanical rates of said polishing material in respective first and second regions.