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. 28, 2026
Filed:
Jul. 09, 2024
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Inventors:
Takashi Iwamoto, Nagaokakyo, JP;
Motoji Tsuda, Nagaokakyo, JP;
Hiroshi Somada, Nagaokakyo, JP;
Eiji Fujimori, Nagaokakyo, JP;
Masaki Kasai, Nagaokakyo, JP;
Takuma Kuroyanagi, Nagaokakyo, JP;
Shinichiro Takayanagi, Nagaokakyo, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/54 (2006.01); H03H 9/13 (2006.01); H03H 9/17 (2006.01); H03H 9/72 (2006.01);
U.S. Cl.
CPC ...
H03H 9/54 (2013.01); H03H 9/133 (2013.01); H03H 9/176 (2013.01); H03H 9/72 (2013.01);
Abstract
A duplexer includes a piezoelectric substrate including an upper surface and a lower surface, a functional element on the lower surface, a flat plate electrode on a side of the upper surface of the piezoelectric substrate, and a dielectric portion that is located between the functional element and the flat plate electrode and has a permittivity lower than a permittivity of the piezoelectric substrate.