Piezoelectric ultrasonic transducer based on flexible AlN
A piezoelectric transducer is realized on flexible highly oriented Aluminum Nitride. Compressive residual stress due to Aluminum Nitride deposited on polymeric substrate is the origin of a dome shape. Flexural behavior of actuated domes is studied by Laser Doppler Vibrometer. Significant mechanical displacement to generate ultrasound waves is measured.
aluminum nitride pmut ultrasound transducer laser vibrometer kapton