Patent ID: 6448655
Filing Date: 2002-09-10
Classification: H01L

Abstract:
An interconnect structure comprising:one or more layers of conductive wiring patterns electrically connected to each other by conductive vias; one or more layers of fluorine-containing dielectric (FCD), each having a thickness between 100 nm and 5000 nm, selected from the group consisting of fluorinated diamond like carbon (FDLC) containing additives selected from O and N; organo-inorganic dielectrics containing fluorine; and organic polymeric dielectrics containing fluorine between at least some of said conductive wiring patterns, wherein said one or more layers of FCD have a top surface and are patterned to form vias and trenches having sidewall FCD regions that have a length which extends from said top surface to an underlying layer, said top surface and said sidewall FCD regions along said entire length contain an ultra-violet and thermal treated near-interface region having a thickness between 5 nm to 300 nm that extends from said FCD interface into said FCD which has a substantially lower fluorine content than other regions of said FCD; and an insulating cap located atop an uppermost FCD layer.