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:
May. 19, 2026
Filed:
Nov. 10, 2023
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Toshiaki Takata, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A filter includes a substrate including a piezoelectric layer, and first and second signal electrodes, a filter circuit on a first path connecting the first signal electrode and the second signal electrode, and an additional circuit on a second path connected in parallel with at least a portion of the first path. The filter circuit includes one or more resonators and a main wiring line on the substrate, and the additional circuit includes a sub-wiring line and an acoustically coupled resonator on the substrate, the acoustically coupled resonator including acoustic wave resonators adjacent to each other. An insulating film is between the substrate and the sub-wiring line. A dielectric constant of the insulating film is smaller than a dielectric constant of the piezoelectric layer.