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Proceedings Paper

Surface acoustic impediography: a new technology for fingerprint mapping and biometric identification: a numerical study
Author(s): Rainer M. Schmitt; W. Guy Scott; Richard D. Irving; Joe Arnold; Charles Bardons; Daniel Halpert; Lawrence Parker
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Paper Abstract

A new type of fingerprint sensor is presented. The sensor maps the acoustic impedance of the fingerprint pattern by estimating the electrical impedance of its sensor elements. The sensor substrate, made of 1-3 piezo-ceramic, which is fabricated inexpensively at large scales, can provide a resolution up to 50 μm over an area of 20 x 25 mm2. Using FE modeling the paper presents the numerical validation of the basic principle. It evaluates an optimized pillar aspect ratio, estimates spatial resolution and the point spread function for a 100 μm and 50 μm pitch model. In addition, first fingerprints obtained with the prototype sensor are presented.

Paper Details

Date Published: 15 September 2004
PDF: 8 pages
Proc. SPIE 5403, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense III, (15 September 2004); doi: 10.1117/12.541869
Show Author Affiliations
Rainer M. Schmitt, Cross Match Technologies (United States)
W. Guy Scott, Cross Match Technologies (United States)
Richard D. Irving, Cross Match Technologies (United States)
Joe Arnold, Cross Match Technologies (United States)
Charles Bardons, Cross Match Technologies (United States)
Daniel Halpert, Cross Match Technologies (United States)
Lawrence Parker, Cross Match Technologies (United States)


Published in SPIE Proceedings Vol. 5403:
Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense III
Edward M. Carapezza, Editor(s)

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