Abstract
The effect of uv irradiation on the material properties of AlN containing low oxygen content (<0.3 wt. %) has been investigated. Upon irradiation with a 150 W Hg-Xe arc lamp, increases in dielectric loss and thermal conductivity drops were observed. Changes in the optical properties, including formation of an absorption band at 650 nm, and photodarkening were also observed. All samples were characterized for trace impurities including carbon, calcium, and oxygen. The magnitude of the uv-induced drops in dielectric loss and the absorption at 650 nm of samples tested were found to depend on the presence of trace levels of residual carbon. UV-induced increases in dielectric loss show an inverse relationship, and formation of an absorption band shows a direct relationship to carbon content.
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References
G. A. Slack, J. Phys. Chem. Solids 34, 321 (1973).
G. A. Slack, J. Phys. Chem. Solids 48, 641 (1987).
R. Lee, J. Am. Ceram. Soc. 74, 2242 (1991).
Y. Kurokawa, K. Utsumi, and H. Takamizawa, J. Am. Ceram. Soc. 71, 588 (1988).
J.H. Harris and R. A. Youngman, J. Mater. Res. 8, 154 (1993).
J.H. Harris, R.C. Enck, and R.A. Youngman, Phys. Rev. B 47, 5428 (1993).
J. H. Harris and R. C. Enck, J. Mater. Res. 8, 2734 (1993).
R. C. Enck and R. D. Harris, in Advanced Electronic Packaging Materials, edited by A.T. Barfknecht, J.P. Partridge, C.J. Chen, and C-Y. Li (Mater. Res. Soc. Symp. Proc. 167, Pittsburgh, PA, 1990), p. 235.
J. H. Schulman and W. D. Compton, Color Centers in Solids (The Macmillan Company, New York, 1962), p. 41.
A. J. Moulson and J. M. Herbert, Electroceramics (Chapman & Hall, London, England, 1991), pp. 58–67.
G. A. Slack and T.F. McNelly, J. Cryst. Growth 42, 560 (1977).
G. Long and L.M. Foster, J. Am. Ceram. Soc. 42, 53 (1959).
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Kaplan, J.C., Gerhardt, R.A. Effect of trace carbon on the uv-induced behavior of aluminum nitride ceramics. Journal of Materials Research 9, 2209–2212 (1994). https://doi.org/10.1557/JMR.1994.2209
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DOI: https://doi.org/10.1557/JMR.1994.2209