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Stress and Phase Engineered ZrO2/Ge for High-k Dielectric Applications

Published online by Cambridge University Press:  08 May 2015

Narayan K. V. L.V. Achari
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-12, India. Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore-12, India.
Amiya Banerjee
Affiliation:
Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore-12, India.
Srinivasan Raghavan
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-12, India. Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore-12, India.
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Abstract

ZrO2/Ge is potential high-k dielectric candidate to replace silicon based devices. Controlling stress in zirconia film and stabilizing high dielectric constant phase is crucial for high-k application. A precise control of stress and phase selectivity in high-k thin films is demonstrated. Thin films of ZrO2 were grown by reactive sputter deposition. Wide range of growth stress in thin films from -0.3 to -2.8 GPa can be tuned by growth rate control. Adatom incorporation into grain boundary was the dominant source of observed stress. Phase selectivity in zirconia was achieved by tuning growth parameters.

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Articles
Copyright
Copyright © Materials Research Society 2015 

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References

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