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:
Jun. 03, 2025
Filed:
Jan. 11, 2024
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventor:
Tetsu Miyoshi, Minami-ashigara, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 17/00 (2006.01); B32B 3/04 (2006.01); B32B 7/12 (2006.01); B32B 27/20 (2006.01); B32B 27/30 (2006.01); H04R 1/06 (2006.01); H04R 7/06 (2006.01); H10N 30/50 (2023.01); H10N 30/857 (2023.01); H10N 30/87 (2023.01);
U.S. Cl.
CPC ...
H04R 17/005 (2013.01); B32B 3/04 (2013.01); B32B 7/12 (2013.01); B32B 27/20 (2013.01); B32B 27/306 (2013.01); H04R 1/06 (2013.01); H04R 7/06 (2013.01); H10N 30/50 (2023.02); H10N 30/857 (2023.02); H10N 30/875 (2023.02); B32B 2307/20 (2013.01); B32B 2307/42 (2013.01); B32B 2457/00 (2013.01);
Abstract
An object is to provide a laminated piezoelectric element capable of preventing a short circuit between adjacent piezoelectric films and an electroacoustic transducer using the laminated piezoelectric element. The object is solved by laminating a plurality of layers of piezoelectric films polarized in a thickness direction, in which a piezoelectric layer is interposed between two thin film electrodes, and causing polarization directions of the adjacent piezoelectric films to be opposite to each other.