Image analysis – Applications – Personnel identification
Reexamination Certificate
2006-03-14
2006-03-14
Chawan, Sheela (Department: 2625)
Image analysis
Applications
Personnel identification
C257S419000, C310S318000
Reexamination Certificate
active
07013031
ABSTRACT:
A fingerprint sensor for sensing a fingerprint by converting pressure applied to a piezoelectric membrane into an electrical signal is provided, wherein the fingerprint sensor having an aggregate of piezoelectric devices includes: a substrate; a lower electrode formed on the substrate; a piezoelectric membrane formed on the lower electrode; an upper electrode formed on the piezoelectric membrane; a pressuring portion formed on the upper electrode for changing a quantity of charge on the piezoelectric membrane due to pressure exerted by contact of a fingerprint; and a non-conductive layer formed on the lower electrode for supporting and exposing the pressuring portion. Thus, a fingerprint sensor having a simple structure is provided, which is able to precisely sense fingerprint information utilizing a piezoelectric phenomenon. The fingerprint sensor may be applied to systems for identifying persons' identities in public institutions and private enterprises, and in individuals' portable systems.
REFERENCES:
patent: 4394773 (1983-07-01), Ruell
patent: 4429413 (1984-01-01), Edwards
patent: 5844287 (1998-12-01), Hassan et al.
patent: 5877580 (1999-03-01), Swierkowski
patent: 6234031 (2001-05-01), Suga
patent: 6437583 (2002-08-01), Tartagni et al.
patent: 6522773 (2003-02-01), Houdeau
Kim Chang-jung
Lee June-key
Park Young-soo
Chawan Sheela
Lee & Morse P.C.
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