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Low Temperature Epitaxial Growth of NiSi2 on BF2+-Implanted (001)Si

Published online by Cambridge University Press:  25 February 2011

W.J. Chen
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
L.J. Chen
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
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Abstract

Epitaxial growth of NiSi2 on BF2+-implanted (O0l)Si at low temperatures has been studied by both cross-sectional and planview transmission electron microscopy. In implanted regrown samples with a 30-nm-thick Ni layer, epilaxial NiSi2 was found to form at a temperature as low as 250 °C. The dominant phase was observed to be NiSi in samples annealed at 400-700 °C. The final structure of the silicide layer was found to depend critically on the thickness of tile starting Ni overlayer and the annealing temperature. The presence of B and/or F atoms in silicon was found to be essential for the tormation of epitaxial NiSi2 on crystalline silicon at 220-300 °C. In addition, tile amorphicity of the substrate was also found to play an important role in promoting the formation of polycrystalline NiSi2 at low temperatures.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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References

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