Patent ID: 8975713
Filing Date: 2015-03-10
Classification: A61B,B06B,G10K,H01L,Y10T

Abstract:
1. An ultrasound probe comprising: a capacitive vibration element configured to mutually convert ultrasound and an electric signal; a semiconductor substrate including a plurality of the capacitive vibration elements formed on the surface thereof; an acoustic lens provided on a front face side of the capacitive vibration element; and a backing layer provided on a rear face side of the semiconductor substrate, wherein the backing layer includes a first backing layer set in contact with the semiconductor substrate and a second backing layer provided on a rear face side of the first backing layer, wherein an acoustic impedance of the first backing layer is set on the basis of a thickness of the semiconductor substrate, wherein the second backing layer is formed of an attenuating material capable of attenuating the ultrasound transmitted through the first backing layer, and wherein an acoustic impedance of the second backing layer is set to match the acoustic impedance of the first backing layer.