PMUT, or piezoelectric micromachined ultrasonic transducer, is a miniature ultrasonic transducer fabricated using MEMS technology. It operates based on the piezoelectric effect: applying voltage to a piezoelectric thin film causes mechanical deformation to emit ultrasonic waves; when receiving ultrasonic waves, mechanical stress generates charge signals, enabling mutual conversion between electrical energy and acoustic energy.

• Compact size and low power consumption
• High integration capability
• Strong environmental adaptability
• Excellent device performance

• Time-of-flight (ToF) distance sensing
• Ultrasonic fingerprint recognition
• Human-machine interaction