Patent ID: 6221754
Filing Date: 2001-04-24
Classification: H01L

Abstract:
A method of fabricating a plug, comprising the steps of:providing a substrate;forming a dielectric layer on the substrate, wherein the dielectric layer has an opening therein to expose a region, and the region is electrically coupled with other regions;performing a first coverage step to form a first plug material layer of a first plug material over the substrate, wherein the first plug material layer is sufficient to fill the opening;removing a portion of the first plug material from over the opening and completely removing the first plug material on the dielectric layer;performing a second coverage to form a second plug material layer on the substrate, wherein the second plug material layer sufficiently fills a dished surface formed by the first plug material in the opening such that a void formed after removing the portion of the first plug material in the opening is partially filled and covered by the second plug material layer; andperforming a chemical mechanical polishing method to removed the second plug material layer on the dielectric layer.