The oxidation of TiN in an oxygen flow at temperatures in the range 300–500 °C has been studied by means of soft x‐ray absorption spectroscopy. The analysis of the experimental results indicates that O progressively displaces N to form TiO2. The process appears to be controlled by the temperature dependence of the oxygen diffusion. Some oxidation is observed to take place even at room temperature. No evidence of oxynitride formation was found in thermally oxidized TiN, instead complete phase separation is observed. The interface between TiO2 and TiN seems to be very abrupt. The appearance of a sharp absorption peak in the N 1s spectrum of TiN is believed to be due to nitrogen atoms which are displaced during the oxidation process and remain unbounded within the TiO2 matrix. For temperatures above 400 °C, this peak disappears as the interstitial N atoms migrate to the surface and desorb.
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January 1993
Research Article|
January 01 1993
Thermal oxidation of TiN studied by means of soft x‐ray absorption spectroscopy
L. Soriano;
L. Soriano
Spectroscopy of Solids and Surfaces, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
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M. Abbate;
M. Abbate
Spectroscopy of Solids and Surfaces, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
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J. C. Fuggle;
J. C. Fuggle
Spectroscopy of Solids and Surfaces, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
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P. Prieto;
P. Prieto
Depto. Física Aplicada C‐XII, Universidad Autónoma Madrid, Cantoblanco, 28049 Madrid, Spain
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C. Jiménez;
C. Jiménez
Depto. Física Aplicada C‐XII, Universidad Autónoma Madrid, Cantoblanco, 28049 Madrid, Spain
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J. M. Sanz;
J. M. Sanz
Depto. Física Aplicada C‐XII, Universidad Autónoma Madrid, Cantoblanco, 28049 Madrid, Spain
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L. Galán;
L. Galán
Depto. Física Aplicada C‐XII, Universidad Autónoma Madrid, Cantoblanco, 28049 Madrid, Spain
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S. Hofmann
S. Hofmann
Max‐Planck‐Institut Für Metallforschung, Institut für Werkstoffwissenchaft, Seestrasse 92, 7000 Stuttgart, Germany
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J. Vac. Sci. Technol. A 11, 47–51 (1993)
Article history
Received:
July 09 1992
Accepted:
October 24 1992
Citation
L. Soriano, M. Abbate, J. C. Fuggle, P. Prieto, C. Jiménez, J. M. Sanz, L. Galán, S. Hofmann; Thermal oxidation of TiN studied by means of soft x‐ray absorption spectroscopy. J. Vac. Sci. Technol. A 1 January 1993; 11 (1): 47–51. https://doi.org/10.1116/1.578718
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