Copper damascene and dual damascene interconnect wiring

摘要

A copper corrosion resistant integrated circuit. The integrated circuit including: a substrate; a copper diffusion barrier layer on the substrate; a dielectric layer on a top surface of the copper diffusion barrier layer; a copper damascene or dual damascene wire in the dielectric layer, a top surface of the copper damascene or dual damascene wire coplanar with a top surface of the dielectric layer; a first capping layer on the top surface of the wire and the top surface of the dielectric layer; and a second capping layer on a top surface of the first capping layer.