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Effect of nitrogen on band alignment in HfSiON gate dielectrics

Applied Physics Letters, ISSN: 0003-6951, Vol: 87, Issue: 21, Page: 1-3
2005
  • 43
    Citations
  • 0
    Usage
  • 20
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    43
    • Citation Indexes
      43
  • Captures
    20

Article Description

Nitridation of HfSiO films improves certain physical and electrical properties-when using gate stack layers-such as their crystallization temperature and their resistance to interdiffusion. We have studied the band alignment of HfSiO and HfSiON films by soft x-ray photoemission, oxygen K -edge x-ray absorption, and spectroscopic ellipsometry. Nitridation of HfSiO reduced the band gap by 1.50 eV±0.05 eV, and the valence- and conduction-band offsets by 1.2 eV±0.1 eV and 0.33 eV±0.05 eV, respectively. Although the band-gap reduction should lead to increased leakage, the barrier heights are still sufficient for proposed near-future complementary metal-oxide-semiconductor applications. © 2005 American Institute of Physics.

Bibliographic Details

S. Sayan; N. V. Nguyen; J. Ehrstein; J. J. Chambers; M. R. Visokay; M. A. Quevedo-Lopez; L. Colombo; D. Yoder; I. Levin; D. A. Fischer; M. Paunescu; O. Celik; E. Garfunkel

AIP Publishing

Physics and Astronomy

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