PROBLEM TO BE SOLVED: To provide an ultrasonic device for appropriately keeping the thickness of an acoustic matching layer.SOLUTION: The ultrasonic device comprises: an ultrasonic element array substrate 20 having a piezoelectric body and a plurality of ultrasonic elements an acoustic lens 50 having a lens part 51 attached to a surface where the ultrasonic elements of the ultrasonic element array substrate 20 are formed, for converging the supersonic wave and an acoustic matching layer 40 arranged between the ultrasonic element array substrate 20 and the acoustic lens 50, and formed of a resin that sticks the ultrasonic element array substrate 20 to the acoustic lens 50. A plurality of wall parts 52 that project in a thickness direction of the ultrasonic lens 50, are formed on a surface of the acoustic lens 50 facing the ultrasonic elements of the ultrasonic element array substrate 20, and at least two wall parts of the plurality of wall parts 52 come into contact with two opposing sides of a periphery where the ultrasonic elements of the ultrasonic element array substrate 20 are not formed, in a planar view in the thickness direction of the ultrasonic element array substrate 20, and thereby the thickness of the acoustic matching layer 40 is kept constant.COPYRIGHT: (C)2014,JPO&INPIT【課題】音響整合層の厚みを適正に保持する超音波デバイスを提供する。【解決手段】圧電体を備え、複数の超音波素子を有する超音波素子アレイ基板20と、超音波素子アレイ基板20の超音波素子が形成された面に固着され超音波を収束させるレンズ部51を有する音響レンズ50と、超音波素子アレイ基板20と音響レンズ50の間に配置され、超音波素子アレイ基板20と音響レンズ50とを固着する樹脂で形成された音響整合層40と、を備え、音響レンズ50の超音波素子アレイ基板20の超音波素子と対向する面において、音響レンズ50に、音響レンズ50の厚み方向に突出する複数の壁部52が形成され、複数の壁部52のうちの少なくとも2つが、超音波素子アレイ基板20の厚み方向の平面視において、超音波素子アレイ基板20の超音波素子の形成されていない外周部の対向する2辺と接触し、音響整合層40の厚みが一定に保持される。【選択図】図6
