| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic wave probe with less dispersion of sensitivity. SOLUTION: The ultrasonic wave probe comprises: an acoustic backing material; a piezoelectric element provided on the acoustic backing material and having a piezoelectric body formed of piezoelectric single crystal and a pair of electrodes respectively provided on a first surface where the piezoelectric body faces the acoustic backing material and a second surface on the opposite side of the first surface; a first acoustic matching layer provided on the second surface of the piezoelectric element and composed of a solid inorganic substance, whose acoustic impedance is≥40% and≤85% of the acoustic impedance of the piezoelectric body; and a second acoustic matching layer provided on the first acoustic matching layer, whose acoustic impedance is smaller than the one of the first acoustic matching layer. A plurality of laminated bodies including the piezoelectric element, the first acoustic matching layer, and the second acoustic matching layer are arrayed one-dimensionally or two-dimensionally on the acoustic backing material. COPYRIGHT: (C)2004,JPO
|
