The electrical and structural properties of thin hafnia films grown by the atomic layer deposition technique were investigated before and after different annealing steps as well as after a dc H plasma treatment. By using the nuclear reaction analysis, the authors demonstrated that high concentrations of hydrogen (about 1–2 at. %) could be observed even in as-grown hafnia layers. An additional hydrogenation of the samples with atomic H led to a significant shift of the flatband voltage. This shift could be explained by the introduction of positively charged H-related defects which were found to be stable at room temperature. By comparing the experimental findings with the theory and the data from muon spin spectroscopy, they tentatively ascribed these defects to interstitial H in HfO2.
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November 2018
Research Article|
October 29 2018
Interaction of hydrogen with hafnium dioxide grown on silicon dioxide by the atomic layer deposition technique
Special Collection:
Conference Collection: 20th Workshop on Dielectrics in Microelectronics
Vladimir Kolkovsky;
Vladimir Kolkovsky
a)
1
Fraunhofer IPMS
, Dresden Maria-Reiche Str. 2, 01109 Dresden, Germany
a)Author to whom correspondence should be addressed: uladzimir.kalkouski@ipms.fraunhofer.de
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Sebastian Scholz;
Sebastian Scholz
1
Fraunhofer IPMS
, Dresden Maria-Reiche Str. 2, 01109 Dresden, Germany
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Valery Kolkovsky;
Valery Kolkovsky
2
Technische Universität Dresden
, Institut für Angewandte Physik, 01062 Dresden
, Germany
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Jan-Uwe Schmidt;
Jan-Uwe Schmidt
1
Fraunhofer IPMS
, Dresden Maria-Reiche Str. 2, 01109 Dresden, Germany
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Rene Heller
Rene Heller
3
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
, P.O. Box 510119, 01109 Dresden, Germany
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a)Author to whom correspondence should be addressed: uladzimir.kalkouski@ipms.fraunhofer.de
Note: This paper is part of the Conference Collection from the 20th Workshop on Dielectrics in Microelectronics Conference.
J. Vac. Sci. Technol. B 36, 062901 (2018)
Article history
Received:
June 22 2018
Accepted:
September 05 2018
Citation
Vladimir Kolkovsky, Sebastian Scholz, Valery Kolkovsky, Jan-Uwe Schmidt, Rene Heller; Interaction of hydrogen with hafnium dioxide grown on silicon dioxide by the atomic layer deposition technique. J. Vac. Sci. Technol. B 1 November 2018; 36 (6): 062901. https://doi.org/10.1116/1.5045634
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