Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
Alloying elements can substantially affect the formation of cobalt silicide. A comprehensive study of phase formation was performed on 23 Co alloys with alloying element concentrations ranging from 1 at.% up to 20 at.%. Using in-situ characterization techniques in which x-ray diffraction (XRD) and elastic-light scattering are monitored simultaneously, we follow the formation of the silicide phases and the associated variation in surface roughness in real time during rapid thermal annealing. For pure Co silicide, we detect the formation of all stable silicide phases (Co2Si, CoSi, and CoSi2) as well as abnormal grain growth in the Co film and thermal degradation of the silicide layer at high temperatures. The effect of the various additives on phase formation was determined. The roughness of the interface was also measured using grazing incidence x-ray reflectivity (GIXR). We show that by selecting an alloy with a specific composition, we can change the phase-formation temperatures and modify the final CoSi2 film texture and roughness.
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
A. Ney, R. Rajaram, et al.
Journal of Magnetism and Magnetic Materials
Biancun Xie, Madhavan Swaminathan, et al.
EMC 2011
Min Yang, Jeremy Schaub, et al.
Technical Digest-International Electron Devices Meeting