Patent ID: 7998859
Filing Date: 2011-08-16
Classification: H01L

Abstract:
1. A method of metallizing a substrate comprising an interconnect feature in the manufacture of a microelectronic device, wherein the interconnect feature comprises a bottom, a sidewall, and a top opening having a diameter, D, the method comprising: depositing a barrier layer on the bottom and the sidewall of the interconnect feature, the barrier layer comprising a metal selected from the group consisting of ruthenium, tungsten, tantalum, titanium, iridium, rhodium, and combinations thereof; contacting the substrate comprising the interconnect feature comprising the bottom and sidewall having the barrier layer thereon with an aqueous composition comprising a reducing agent for removal of oxide that may have formed on the surface of the barrier metal; and after contact of said substrate with said aqueous solution, depositing copper metal onto the bottom and the sidewall of the interconnect feature having the barrier layer thereon.