MEMS realizes the conversion between electrical signal and mechanical vibration (sound wave) by the effect of piezoelectric material. In the era of IOT, piezoelectric materials are widely used in sensors, acoustic wave filters, vibration control and other fields. SMEI is committed to providing customers with advanced piezoelectric materials and product solutions. The performance of AlN, ScAlN, PZT piezoelectric films and other properties have reached the leading level in the industry. We have mature fabrication solutions in resonators, filters, ultrasonic transducers, piezoelectric microphones, speakers and other actuators or sensors.