PROBLEM TO BE SOLVED: To provide an ultrasonic probe where a rectangle vibrator and a piezoelectric vibrator other than the rectangle vibrator is used, a configuration for joining a flexible printed circuit board to a rear surface of a piezoelectric element is used, and a bent part is protected by a protection layer.SOLUTION: The ultrasonic probe includes a base layer, a signal wiring layer, and a protection layer. The base layer has an upsurge in some parts. The signal wiring layer is formed on a surface at the side of a piezoelectric element of the base layer along with the base layer, and connected to a signal electrode grounded at a rear surface of the piezoelectric element via a part corresponding to the upsurge. The protection layer is formed in both sides across a part of the signal wiring layer corresponding to the upsurge. The ultrasonic probe also includes a flexible printed circuit board. On the flexible printed circuit board, a surface at the side of a piezoelectric vibration component of a part of the signal wiring layer corresponding to the upsurge is connected to a rear surface of the signal electrode, and a surface at the side of a piezoelectric vibration component of the protection layer is connected to the rear surface of the signal electrode.COPYRIGHT: (C)2011,JPO&INPIT【課題】矩形振動子に加え、矩形以外の圧電振動子を用い、圧電素子の背面にフレキシブルプリント基板を接合する構成を用いた、折り曲げ部を保護層で保護した超音波プローブを提供すること。【解決手段】一部に盛り上がり部を有するベース層と、前記ベース層の圧電素子側の面に前記ベース層に沿って形成され、前記盛り上がり部に対応する一部で前記圧電素子の背面に接地された信号電極に接続される信号配線層と、前記盛り上がり部に対応する前記信号配線層の一部を挟んで両側に形成された保護層とを備え、前記盛り上がり部に対応する前記信号配線層の一部の前記圧電振動部品側の面と、前記信号電極の背面とが接続され、前記保護層の前記圧電振動部品側の面と、前記信号電極の背面とが接続されたフレキシブルプリント基板を具備するよう構成されている。【選択図】図1
