28–29 Jan 2025
Instituto Superior Técnico - Campus Alameda
Europe/Lisbon timezone

Development of a magnetoresistive sensor for fingerprint reading

29 Jan 2025, 11:12
12m
Anfiteatro PA1 (Instituto Superior Técnico - Campus Alameda)

Anfiteatro PA1

Instituto Superior Técnico - Campus Alameda

Av. Rovisco Pais 1, 1049-001 Lisboa

Speaker

Hugo Amaral (Instituto Superior Técnico)

Description

Fingerprints are one of the best ways to identify people, they have been used to solve crimes and link suspects to the crime scene for over 100 years, they are one of the most important tools in criminal investigation. Currently fingerprint imaging is done using optical devices, by using magnetic imaging methods instead additional data can be encoded into the fingerprint and used, for example, for security and anti-falsification purposes.

For this we decided to use devices that exploit the property of magnetoresistance, specifically tunneling magnetoresistance devices which provide a high magnetoresistance ratio such that, even normal toner ink, which contains very a very low amount of magnetic particles, can be used for this purpose.

Primary author

Hugo Amaral (Instituto Superior Técnico)

Presentation materials