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Article Dans Une Revue Journal of Applied Physics Année : 2013

In situ high-temperature characterization of AlN-based surface acoustic wave devices

Résumé

We report on in situ electrical measurements of surface acoustic wave delay lines based on AlN/sapphire structure and iridium interdigital transducers between 20 °C and 1050 °C under vacuum conditions. The devices show a great potential for temperature sensing applications. Burnout is only observed after 60 h at 1050 °C and is mainly attributed to the agglomeration phenomena undergone by the Ir transducers. However, despite the vacuum conditions, a significant oxidation of the AlN film is observed, pointing out the limitation of the considered structure at least at such extreme temperatures. Original structures overcoming this limitation are then proposed and discussed.
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Dates et versions

hal-00871910 , version 1 (25-05-2022)

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T. Aubert, Jochen Bardong, Ouarda Legrani, O. Elmazria, M. Badreddine Assouar, et al.. In situ high-temperature characterization of AlN-based surface acoustic wave devices. Journal of Applied Physics, 2013, 114 (1), pp.014505. ⟨10.1063/1.4812565⟩. ⟨hal-00871910⟩
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