The composition of ultrathin silicon oxynitrides thermally grown in nitric oxide

E. P. Gusev, H. C. Lu, T. Gustafsson, Eric Garfunkel, M. L. Green, D. Brasen

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Abstract

The thermal oxynitridation of Si(100) in nitric oxide (NO) has been studied by high resolution medium energy ion scattering for ultrathin films. The nitrogen depth distribution and the composition of the films have been accurately determined. It is observed that for NO-grown films the nitrogen is distributed relatively evenly in the film, unlike the sharply peaked distribution observed in the case of SiO2 films that were subsequently annealed in NO. The width of the nitrogen distribution, as well as the oxynitride thickness, increase with temperature. It is further found that the total amount of nitrogen in the film and the ratio of nitrogen to oxygen increases with increasing oxynitridation temperature. These results have significant impact on our understanding of how nitrogen can be positioned in next-generation gate dielectrics.

Original languageEnglish
Pages (from-to)896-898
Number of pages3
JournalJournal of Applied Physics
Volume82
Issue number2
Publication statusPublished - Jul 15 1997

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Gusev, E. P., Lu, H. C., Gustafsson, T., Garfunkel, E., Green, M. L., & Brasen, D. (1997). The composition of ultrathin silicon oxynitrides thermally grown in nitric oxide. Journal of Applied Physics, 82(2), 896-898.