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:
Mar. 21, 2023
Filed:
Sep. 17, 2018
Applicant:
Fingerprint Cards Ab, Gothenburg, SE;
Inventor:
Karl Lundahl, Gothenburg, SE;
Assignee:
FINGERPRINT CARDS ANACATUM IP AB, Gothenburg, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06V 40/13 (2022.01); B06B 1/06 (2006.01); H01L 41/113 (2006.01); H01L 41/047 (2006.01); H01L 41/083 (2006.01); H01L 41/187 (2006.01); H01L 41/22 (2013.01); H01L 41/25 (2013.01); H01L 41/27 (2013.01);
U.S. Cl.
CPC ...
G06V 40/1306 (2022.01); B06B 1/0622 (2013.01); H01L 41/0472 (2013.01); H01L 41/083 (2013.01); H01L 41/1132 (2013.01); H01L 41/187 (2013.01); H01L 41/22 (2013.01); H01L 41/25 (2013.01); H01L 41/27 (2013.01); B06B 2201/20 (2013.01);
Abstract
An ultrasonic transducer device for use in an acoustic biometric imaging system, the ultrasonic transducer device comprising: a first piezoelectric element having a first face, a second face opposite the first face, and side edges extending between the first face and the second face; a first transducer electrode on the first face of the first piezoelectric element; a second transducer electrode on the second face of the first piezoelectric element; and a spacer structure leaving at least a portion of the first transducer electrode of the first piezoelectric element uncovered.