ORGANIC PIEZOELECTRIC MATERIAL, ULTRASONIC VIBRATOR, AND ULTRASONIC IMAGE DIAGNOSIS APPARATUS FOR MEDICAL APPLICATION

摘要

This invention provides an organic piezoelectric material for constituting an ultrasonic vibrator, which has excellent piezoelectric properties and is suitable in high-frequency and broad bands, an ultrasonic probe using the organic piezoelectric material, and an ultrasonic image diagnosis apparatus for medical application. The organic piezoelectric material is a film-shaped organic piezoelectric material and is characterized in that the organic piezoelectric material is produced by a process comprising performing heat treatment at a temperature at or above room temperature and at or below a temperature of 10°C below the melting point of the organic piezoelectric material while applying tension and subsequently performing relaxation treatment in a period between the completion of the heat treatment and the time when the material has been cooled to room temperature.