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|Title:||Study of copper suicide retardation effects on copper diffusion in silicon|
|Citation:||Lee, C.S., Gong, H., Liu, R., Wee, A.T.S., Cha, C.L., See, A., Chan, L. (2001-10). Study of copper suicide retardation effects on copper diffusion in silicon. Journal of Applied Physics 90 (8) : 3822-3824. ScholarBank@NUS Repository. https://doi.org/10.1063/1.1343518|
|Abstract:||A B-buried layer with a dose of 1 × 1014 atoms/cm2 was introduced into p-doped Si at a depth of 2.2 μm to enhance copper diffusion via its inherent gettering effect. Copper was then introduced into silicon either via a low-energy implantation followed by a thermal anneal, or through the thermal drive in of physical vapor deposited (PVD) copper film. Secondary ion mass spectrometry depth profiling of both annealed samples later indicated that while substantial amounts of copper was gettered by the B layer in the former sample, no copper was gettered by the B-buried layer in the latter sample. Further analysis with an x-ray diffraction technique showed that copper suicide, Cu3Si was formed in the latter sample. It is thus surmised that the formation of this suicide layer impeded the diffusion of copper towards the B-buried layer. This work investigates the cause of CuSix formation and the underlying reasons for the lower mobility of Cu in PVD Cu film samples. © 2001 American Institute of Physics.|
|Source Title:||Journal of Applied Physics|
|Appears in Collections:||Staff Publications|
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