Piezoelectric element, manufacture and ultrasonic probe

A method of manufacturing a piezoelectric element comprising at least two electrodes having therebetween a composite layer comprised of a high-dielectric layer and a low-dielectric layer, the method comprising:

• forming the high-dielectric layer and forming the low-dielectric on the high-dielectric layer to form the composite dielectric layer, and
• disposing a first electrode on one side of the composite dielectric layer and disposing a second electrode on the other side of the composite dielectric layer,
• wherein at least one the high-dielectric layer and the low-dielectric layer is subjected to a polarization treatment and the high-dielectric layer is comprised of an organic material (1).

An ultrasonic probe for transmitting and receiving an ultrasonic wave, wherein the probe comprises a transmitting piezoelectric element and a receiving piezoelectric element, and the receiving piezoelectric element comprises at least two electrodes having therebetween a composite dielectric layer comprised of a high-dielectric layer and a low-dielectric layer and the high-dielectric layer is comprised of an organic material (1).