CPL - Chalmers Publication Library

Capacitive micromachined ultrasonic transducer (cMUT) for biometric applications

Författare och institution:
PAVLO FESENKO (Institutionen för mikroteknologi och nanovetenskap)
Publikationstyp:
Examensarbete på avancerad nivå
Program:
Masterarbete ()
Publiceringsår:
2012
Språk:
engelska
Fulltextlänk (lokalt arkiv):
Sammanfattning (abstract):
Biometric devices (such as fingerprint sensors, iris scanners, face recognition systems etc.) are becoming more and more popular in areas where personal identification is required - migration control, physical access, online banking etc. Nowadays the most used biometric sensor is a fingerprint scanner which provides a good combination of accuracy, size and price. However, fingerprint recognition is not always successful in case of sweaty/dirty fingers and the accuracy rate can fall down to 80-90% which is not enough for high-security applications. The solution of this problem can be found in combining fingerprint pattern with other biometric data inside the finger (vein pattern or bone geometry). It can be achieved using ultrasound imaging technique and capacitive micromachined ultrasonic transducer (cMUT) is a good choice to perform these measurements. The main advantage of cMUT is ideal design compatibility with the fingerprint sensor based on capacitive method - a product of Fingerprint Cards AB (FPC) which participates as an industrial partner in this project. Modeling and fabrication of a cMUT array was done using the top interconnect layers of the CMOS technology which can be integrated in the process line of the FPC fingerprint capacitive sensor. Thus, it will be possible to create a multi-modal biometric device with an ability to acquire both fingerprint pattern and additional biometric features (vein pattern, bone geometry).
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Data- och informationsvetenskap
TEKNIK OCH TEKNOLOGIER ->
Elektroteknik och elektronik
Nyckelord:
biometrics, fingerprint, capacitive sensor, cMUT, CMOS
Chalmers styrkeområden:
Informations- och kommunikationsteknik
Produktion
Transport
Ytterligare information:
Supervisor Peter Enoksson
Postens nummer:
166084
Posten skapad:
2012-11-14 16:59
Posten ändrad:
2013-04-10 11:41

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