Descripción
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Al0.7Sc0.3N films were reactively sputtered from Al-Sc segmented targets by ac powered dual-cathode S-gun magnetron. Films with homogeneous Sc concentration within 30 +/- 0.5 at. % were grown at ambient temperature directly on 200-mm (100) silicon wafers and on 100-mm silicon substrates covered with SiO2/Mo-based acoustic reflectors terminated by highly (110) textured Mo electrodes. The piezoelectric assessment derived from the frequency response of bulk acoustic resonators yields values of the electromechanical coupling factor k(2) up to 12.8%. Infrared absorption and X-ray diffraction measurements reveal that tiny structural changes may lead to deviation in the value of k(2) across the wafer, which can be reduced by performing a post-processing heat treatment at around 600 degrees C. | |
Internacional
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Si |
Nombre congreso
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2019 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) |
Tipo de participación
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960 |
Lugar del congreso
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Glasgow, UK |
Revisores
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Si |
ISBN o ISSN
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1948-5719 |
DOI
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Fecha inicio congreso
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06/10/2019 |
Fecha fin congreso
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09/10/2019 |
Desde la página
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720 |
Hasta la página
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723 |
Título de las actas
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Proceedings of the 2019 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) |