Organic piezoelectric material, ultrasonic oscillator using the material, method for manufacturing the ultrasonic oscillator, ultrasonic probe, and ultrasonic medical diagnostic imaging device

摘要

Provided is an organic piezoelectric material which has excellent piezoelectric property, heat resistance property in particular. An ultrasonic oscillator, which is to be used for an ultrasonic medical diagnostic imaging device which can receive high frequencies at high sensitivity and is suitable for harmonic imaging techniques, a method for manufacturing such oscillator, and an ultrasonic probe are also provided. The ultrasonic medical diagnostic imaging device is provided by sing such oscillator, method and probe. The organic piezoelectric material is characterized by containing empty particles having an average particle diameter of 10 μm or less.

主权项

1. A method for producing an ultrasonic oscillator, comprising: the step of carrying out a polarization treatment to an organic piezoelectric material wherein the organic piezoelectric material comprises hollow particles having an average particle diameter of 10 μm or less,
the hollow particles are made of at least one resin selected from the group consisting of a polystyrene resin, an acrylic resin, a styrene acrylic resin, a polyethylene resin, a polypropylene resin, a polyacetal resin, a chlorinated polyether resin, polyvinyl chloride resin, a phenol-formaldehyde resin, a urea-formaldehyde resin, a melamine-formaldehyde resin, a furan resin and an unsaturated polyester resin, and the polarization treatment is carried out at one of the moments of: before providing two electrodes on both surfaces of the organic piezoelectric material; after providing one of the two electrodes on one of the surfaces of the organic piezoelectric material; and after providing the two electrodes on the both surfaces of the organic piezoelectric material.