Sensor puts finger on mobile security

Sensor puts finger on mobile securityRichard Ball STMicroelectronics is preparing to put its fingerprint recongnition IC into production for products such as mobile phones and laptop PCs. A prototype was first shown in May last year with 390dpi resolution. This latest version ups the resolution to 508dpi. Dead or alive… Resolution and sensitivity of the sensor are high enough to detect the difference between a living finger and one that has been chopped off! “Our product is based on a sensor which detects capacitance between the finger and a plate. This can recognise the difference between ridges and valleys of fingerprints,” said product manager Herve Martin. All the associated electronics, including A/D converters, is integrated, so the sensor can easily be interfaced to a controller using an I2C bus. Resolution and sensitivity of the sensor are high enough to detect the difference between – hold onto your breakfast – a live or dead finger. In print… STMicroelectronics‘ fingerprint sensor has gone into production.
Martin expects the sensor to be integrated into phones and laptops next year. It is small enough for such applications because the entire sensor is constructed on silicon.


Leave a Reply

Your email address will not be published. Required fields are marked *

*