PROBLEM TO BE SOLVED: To provide an ultrasonic element having wide bandwidth and high transmission/reception efficiency.SOLUTION: An ultrasonic element 20 includes: a plurality of first transducer cells 10A1 in which lower electrodes and upper electrodes are facingly disposed via first cavities 14A1 that are isotropic in planar view and a plurality of second transducer cells 10A2 in which lower electrodes and upper electrodes are facingly disposed via second cavities 14A2 that are anisotropic in planar view.COPYRIGHT: (C)2014,JPO&INPIT【課題】帯域幅が広く、かつ送受信効率のよい超音波エレメントを提供する。【解決手段】超音波エレメント20は、平面視形状が等方的な第1のキャビティ14A1を介して下部電極と上部電極とが対向配置している複数の第1の振動子セル10A1と、平面視形状が非等方的な第2のキャビティ14A2を介して下部電極と上部電極とが対向配置している複数の第2の振動子セル10A2と、を有する。【選択図】図8
