| 摘要 |
PURPOSE:To provide an ultrasonic probe in which a reflection on a field face can be prevented by successively changing an acoustic impedance. CONSTITUTION:In an electronic scanning type ultrasonic probe equipped with vibrator groups arrayed on an ultrasonic absorber 1, which operates an ultrasonic beam scanning to an object to be detected, the vibrator is constituted of a piezoelectric member 2 having a prescribed width whose both faces are equipped with electrodes 3 and 4, plastic layer 6 formed on the piezoelectric member 2, and high water absorptive resin 7 formed on the plastic layer 6. Then, inclined layers 61-6n and 71-7n whose composition is gradually changing are respectively formed between the piezoelectric member 2 and the plastic layer 6, and between the plastic layer 6 and the high water absorptive resin 7. |
