The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2008
Filed:
Apr. 16, 2003
Bruce C. S. Chou, Hsinchu, TW;
Yuan-wei Cheng, Hsinchu, TW;
Ching-fu Tsou, Taichung, TW;
Ming-lin Tsai, Taipei, TW;
Bruce C. S. Chou, Hsinchu, TW;
Yuan-Wei Cheng, Hsinchu, TW;
Ching-Fu Tsou, Taichung, TW;
Ming-Lin Tsai, Taipei, TW;
Ligh Tuning Technology Inc., Hsinchu, TW;
Abstract
The present invention provides a fingerprint sensing mechanism using a two-dimensional thermoelectric sensor array to capture the thermal image related to the ridges and valleys on the finger, wherein its fabricating method is totally compatible with integrated circuits processing. Using the body temperature of a human being as the stimulation source for biometrics, a temperature difference is produced from a ridge of a fingerprint contacting the thermoelectric sensor and the temperature gradient is converted into an electrical signal. A plurality of thermoelectric sensors arranged in a two-dimensional array forms a fingerprint sensor so as to obtain the electrical signal output of the ridge profile of the fingerprint.