Patent ID: 6727172
Filing Date: 2004-04-27
Classification: H01L

Abstract:
A method of fabricating a copper structure, on a semiconductor substrate, comprising the steps of:forming an opening in an insulator layer, exposing a portion of a top surface of an underlying conductive region, located at the bottom of said opening; depositing a barrier layer; depositing a thick copper layer, between about 6000 to 9000 Angstroms in thickness, completely filling said opening, in said insulator layer, and with a portion of said thick copper layer residing on the top surface of said barrier layer in a region in which said barrier layer overlays the top surface of said insulator layer; forming a thin compressive layer between about 200 to 500 Angstroms in thickness, on the top surface of said copper layer; performing an anneal procedure; and removing said thin compressive layer, removing the portion of said thick copper layer from the top surface of said barrier layer, and removing the portion of said barrier layer from the top surface of said insulator layer, creating said copper structure, in said opening in said insulator layer.