Epitaxial ZnO piezoelectric layer on SiO2/Mo solidly mounted resonator fabricated using epitaxial Au sacrificial layer
Satoshi Tokai,
Takahiko Yanagitani
Abstract:In SMR type of BAW resonator, it is difficult to fabricate single crystalline piezoelectric thin films in a bottom-up process due to the amorphous SiO2 in the low acoustic impedance layer of acoustic Bragg reflector. In this study, single crystalline ZnO piezoelectric layer on amorphous SiO2/polycrystalline Mo acoustic Bragg reflector is fabricated using a wet etching process of epitaxial Au sacrificial layer. Epitaxial growth of ZnO was confirmed by XRD pole figure and TEM electron diffraction pattern. Resona… Show more
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