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What is ultrasonic fingerprint scanner?

This new Sense ID developed by Qualcomm uses sonic technology to register finger grooves. It employs acoustic ultrasonic sound to map users fingerprint in any state. It is fastest and most secure fingerprint sensor currently available in the market. Unlike existing optical and capacitive fingerprint sensor which depends on 2D mapping, Ultrasonic fingerprint sensor register minute details in 3D and are thus very hard to fool.

How does Ultrasonic Fingerprint Sensor Work?

An ultrasonic fingerprint sensor consists of a sonic sound transmitter and a receiver. The sensor transmits a high-frequency sonic sound each time a finger comes in contact with the sensor. The emitted sound waves penetrate through epidermis layer (outermost layer of the skin which generally carries sweat, food oil and grease) and reflects off from the dermis layer (under top layer of skin) back to the receiver. In this process, it registers a unique print which also includes ridges and sweat pores. Sonic waves are capable of scanning through all most all plastics, sapphire crystal, and metal.


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