Publication: Defect structure of SiNx : H films and its evolution with annealing temperature
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American Institute of Physics
The structure of defects of SiNx:H films is investigated by electron-spin resonance. It is found that a relaxation process takes place at annealing temperatures below 600 degrees C for those compositions in which the nitrogen-to-silicon ratio is above the percolation threshold of the Si-Si bonds in the nitride lattice. The nature of this process is discussed and attributed to a thermally activated charge transfer between metastable defects. No such relaxation occurs in the films with a composition below the percolation threshold, possibly due to a positive correlation energy and a structural lack of flexibility. For higher annealing temperatures, an increase of the defect density is observed and associated with the thermal release of hydrogen. (C) 2000 American Institute of Physics. [S0021-8979(00)00516-8].
© American Institute of Physics. This work was financed by the Spanish Ministry of Science (Grant No. TIC98/0740) and given technical assistance by the "Implantación Iónica" research support center of the University of Madrid.
1) T. P. Ma, IEEE Trans. Electron Devices 45, 680 (1998). 2) A. Beyer, G. Ebest, and R. Reich, Appl. Phys. Lett. 68, 508 (1996). 3) D. Xu and V. J. Kapoor, J. Appl. Phys. 70, 1570 (1991). 4) Y. Roizin, J. Non-Cryst. Solids 137-138, 61 (1991). 5) D. T. Krick, P. M. Lenahan, and J. Kanicki, Phys. Rev. B 38, 8226 (1988). 6) D. Jousse, J. Kanicki, D. T. Krick, and P. M. Lenahan, Appl. Phys. Lett. 52, 445 (1988). 7) W. L. Warren, P. M. Lenahan, and S. E. Curry, Phys. Rev. Lett. 65, 207 (1990). 8) F. L. Martínez, I. Mártil, G. González-Díaz, B. Selle, and I. Sieber, J. Non-Cryst. Solids 227-230, 523 (1998). 9) F. L. Martínez, Á. del Prado, D. Bravo, F. López, I. Mártil, and G. González-Díaz, J. Vac. Sci. Technol. A 17, 1280 (1999). 10) S. García, D. Bravo, M. Fernández, I. Mártil, and F. López, Appl. Phys. Lett. 67, 3263 (1995). 11) W. A. Lanford and M. J. Rand, J. Appl. Phys. 49, 2473 (1978). 12) F. L. Martínez, Á. del Prado, I. Mártil, G. González-Díaz, B. Selle, and I. Sieber, J. Appl. Phys. 86, 2055 (1999). 13) J. Kanicki and W. L. Warren, J. Non-Cryst. Solids 164-166, 1055 (1993). 14) W. L. Warren, J. Kanicki, F. C. Rong, and E. H. Poindexter, J. Electrochem. Soc. 139, 880 (1992). 15) M. Stutzmann, Philos. Mag. B 60, 531 (1989).