Patent ID: 6146991
Filing Date: 2000-11-14
Classification: H01L

Abstract:
A method of forming a metal plug, in an opening in an insulator layer, with a composite adhesive-barrier layer, located between said metal plug, and the surfaces of said opening in said insulator layer, comprising the steps of:providing a conductive region;forming an opening in an insulator layer, that overlays said conductive region, with said opening exposing a portion of the top surface of said conductive region;depositing an adhesive layer on the walls of said opening, in said insulator layer, and on the portion of said conductive region, exposed at the bottom of said opening;forming a first barrier layer on said adhesive layer;performing a plasma anneal procedure:depositing a second barrier layer on plasma annealed, said first barrier layer; andforming said metal plug in said opening, in said insulator layer, with said metal plug overlying, and interfacing, said second barrier layer.