Patent ID: 7265038
Filing Date: 2007-09-04
Classification: H01L

Abstract:
1. A method for forming a copper damascene comprising the steps of: providing a substrate comprising a semiconductor substrate; forming an insulator layer on the substrate; forming a damascene opening through a thickness portion of the insulator layer; forming a diffusion barrier layer to line the damascene opening; then forming a first seed layer on the diffusion barrier; then plasma treating the first seed layer in-situ with a first treatment plasma, said first treatment plasma formed from plasma source gases selected from the group consisting of argon, nitrogen, hydrogen, and NH then forming a second seed layer on the first seed layer; forming a copper layer overlying the second seed layer according to an electro-chemical plating (ECP) process to fill the damascene opening; and, planarizing the copper layer to form a metal interconnect structure.