PROBLEM TO BE SOLVED: To provide an ultrasonic probe in which plural inorganic piezoelectric elements and plural organic piezoelectric elements are stacked to be formed capable of generating an ultrasonic image of high picture quality.SOLUTION: On a surface of a backing material 1, plural inorganic piezoelectric elements 2 having pitches P1 are arrayed to be formed, on plural inorganic piezoelectric elements 2, an acoustic matching layer 3 is extended over whole of the plural inorganic piezoelectric elements 2, and plural organic piezoelectric elements 4 having pitches P2 are arrayed to be formed on the acoustic matching layer 3. The plural organic piezoelectric elements 4 comprise: plural signal electrode layers 42 which contacts a surface of the acoustic matching layer 3 a common organic piezoelectric substance 41 joined onto the plural signal electrode layers 42 and extended over the plural organic piezoelectric elements 4 and a common ground electrode layer 43 joined onto the organic piezoelectric substance 41 and extended over the plural organic piezoelectric elements 4.COPYRIGHT: (C)2013,JPO&INPIT【課題】複数の無機圧電素子と複数の有機圧電素子とが積層形成されながらも高画質の超音波画像の生成を可能とする超音波探触子を提供する。【解決手段】バッキング材1の表面上にピッチP1で複数の無機圧電素子2が配列形成され、複数の無機圧電素子2の上に、複数の無機圧電素子2の全体にわたって音響整合層3が延在し、音響整合層3の上にピッチP2で複数の有機圧電素子4が配列形成されている。複数の有機圧電素子4は、音響整合層3の表面に接する複数の信号電極層42と、複数の信号電極層42の上に接合され且つ複数の有機圧電素子4にわたって延在する共通の有機圧電体41と、有機圧電体41の上に接合され且つ複数の有機圧電素子4にわたって延在する共通の接地電極層43とを有している。【選択図】図1
