A capacitive hybrid flip-chip ASIC and sensor for fingerprint, navigation and pointer detection

Author

Vermesan, O. ; Riisnaes, K.H. ; Le-Pailleur, L. ; Nysaether, J.B. ; Bauge, M. ; Rustad, H. ; Clausen, S. ; Blystad, L.-C. ; Grindvoll, H. ; Pedersen, R. ; Pezzani, R. ; Kaire, D.

Author_Institution

SINTEF, Oslo, Norway

fYear

2003

fDate

13-13 Feb. 2003

Firstpage

214

Abstract

A fingerprint detection technology that supports navigation, pointer and fingerprint acquisition is described. The hybrid system consists of a silicon sensor substrate flip-chipped onto a mixed signal ASIC. The sensor is linear and the finger is swept over to scan the fingerprint. To achieve 500 dpi accuracy, separate process optimization for both the ASIC and the sensor substrate gives a alternative solution compared to all silicon sensor approaches. The ASIC is 18 mm/sup 2/ in 0.25 /spl mu/m CMOS and the sensor is 105 mm/sup 2/.

Keywords

CMOS integrated circuits; capacitive sensors; circuit optimisation; fingerprint identification; flip-chip devices; mixed analogue-digital integrated circuits; 0.25 /spl mu/m CMOS; 0.25 micron; CMOS sensor chips; Si; capacitive hybrid flip-chip ASIC; fingerprint detection technology; hybrid system; mixed signal ASIC; navigation; pointer detection; process optimization; sensor; silicon sensor substrate; Application specific integrated circuits; CMOS technology; Capacitance; Capacitive sensors; Fingerprint recognition; Fingers; Multiplexing; Navigation; Sensor phenomena and characterization; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC. 2003 IEEE International

Conference_Location

San Francisco, CA, USA

ISSN

0193-6530

Print_ISBN

0-7803-7707-9

Type

conf

DOI

10.1109/ISSCC.2003.1234272

Filename

1234272