Dipole Moment Model Explaining nFET V<inf>t</inf> Tuning Utilizing La, Sc, Er, and Sr Doped HfSiON Dielectrics
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Bibliographic record
Abstract
A dipole moment model explaining V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</inf> tuning in HfSiON gated nFETs is proposed and its impact on performance and reliability is presented. La, Sc, Er, and Sr dopants are utilized due to their differing electronegativities and ionic radii. These dopants tune V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</inf> in the range of 250-600 mV. V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</inf> tuning is found to be proportional to the net dipole moment associated with the Hf-O and rare earth (RE)-O bonds at the high-k/SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> interface. The magnitude of this interfacial dipole moment is determined by the electronegativities and ionic radii of the RE cations. LaO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> is the most effective dopant based on V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</inf> , mobility, and reliability.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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