Patent ID: 6455425
Filing Date: 2002-09-24
Classification: H01L

Abstract:
A method of manufacturing an electrical device, which method comprises the sequential steps of:(a) providing a substrate including at least one damascene-type, metal feature in-laid in the exposed, upper surface of a layer of dielectric material overlying at least a portion of said substrate, the at least one metal feature including an upper, exposed surface substantially co-planar with said upper surface of said layer of dielectric material; (b) selectively depositing only on said exposed upper surface of said at least one metal feature at least one layer comprising at least one metallic passivant element for passivating said upper surface of said at least one metal feature, said at least one metallic passivant element selected from the group consisting of magnesium (Mg), titanium (Ti), tantalum (Ta), cobalt (Co), nickel (Ni), palladium (Pd), and chromium (Cr); and (c) effecting reaction between at least a portion of said at least one layer comprising at least one metallic passivant element and said upper surface of said at least one metal feature to form a passivating layer thereat, whereby electromigration of the metal of said at least one metal feature is minimized or substantially prevented.