1. Piezoelectric Micromachined Ultrasound Transducer (PMUT)

PMUT is an ultrasonic transducer based on piezoelectric energy conversion. It is usually composed of piezoelectric thin/thick films, upper and lower electrodes, support layers, and a cavity; the entire diaphragm area is driven to vibrate through the piezoelectric film, and ultrasonic waves are radiated outward. .

PMUT Features:

Low acoustic impedance - easy coupling with gases and liquids

Small size - 1mm~15mm adjustable

Can be batch prepared - low cost and good consistency

Easy to integrate with IC

The ultrasonic flowmeter is a flow sensor made according to the principle that the ultrasonic propagation speed changes with the change of the gas or liquid flow rate. The gas flow ultrasonic transducer usually has a frequency of 100KHz~1MHz, and the liquid flow ultrasonic transducer usually has a frequency of 1M~ 5MHz.

The existing ultrasonic transducers can well meet the requirements of use, but they are usually large in size and difficult to install inside the pipeline; PMUT has a smaller size and is easy to manufacture on a large scale.

Product model: C3-200K-3 Package size: ≤5*5mm²

Bare chip size: 3*3mm² Package: QFN or DFN

Receiving Sensitivity: 20mV (one-transmit-one-receive mode, driving voltage: 25Cycle, Vpp=5V, square wave, transducer spacing 55mm)