PROBLEM TO BE SOLVED: To provide an ultrasonic probe which is excellent in sensitivity and bandwidth expansion and is equipped with a composite piezoelectric layer high in durability and stability, an ultrasonic image diagnostic apparatus, and a method for manufacturing the ultrasonic probe.SOLUTION: An ultrasonic probe for outputting ultrasound on the basis of a received driving signal includes: a composite piezoelectric layer where a piezoelectric material and a polymer material are arranged by turns in a one-dimensional or two-dimensional array shape an acoustic reflection layer having higher acoustic impedance than acoustic impedance of the composite piezoelectric layer and an adhesion layer for joining the composite piezoelectric layer and the acoustic reflection layer. Portions formed by the polymer material in a joint surface between the composite piezoelectric layer and the acoustic reflection layer is formed into a recess on the side opposite the acoustic reflection layer side with respect to a portion formed by the piezoelectric material.COPYRIGHT: (C)2014,JPO&INPIT【課題】高感度及び広帯域化に優れ、耐久性、安定性の高い複合圧電層を備えた超音波探触子、超音波画像診断装置及び超音波探触子の製造方法を提供する。【解決手段】受信する駆動信号に基いて超音波を出力するための超音波探触子において、1次元または2次元アレイ状に圧電材と高分子材とを交互に配列してなる複合圧電層と、前記複合圧電層の音響インピーダンスよりも高い音響インピーダンスを持つ音響反射層と、前記複合圧電層と前記音響反射層とを接合するための接着層と、を備える超音波探触子であって、前記複合圧電層の前記音響反射層との接合面の内、前記高分子材で形成される部分は、前記圧電材で形成される部分に対して前記音響反射層側と反対側に凹んで形成する。【選択図】図3A
