Properties of Sputtered Bilayer WN x /W Diffusion Barriers between Si and Cu

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Properties of Sputtered Bilayer WNx/W Diffusion Barriers between Si and Cu K. D. Leedy, M. J. O'Keefe1, E. J. Dahlgren1 and J. T. Grant2 Air Force Research Laboratory, Sensors Directorate, Wright-Patterson AFB, OH 45433 1 University of Missouri-Rolla, Dept. of Metallurgical Engineering, Rolla, MO 65401 2 Research Institute, University of Dayton, Dayton, OH 45469 ABSTRACT Copper interconnect metallizations in next generation integrated circuits will require thin diffusion barrier layers (