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. 04, 2025
Filed:
Mar. 23, 2022
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Yasumasa Taniguchi, Nagaokakyo, JP;
Katsuya Daimon, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
An acoustic wave filter includes acoustic wave resonators including a piezoelectric substrate and an IDT electrode including first and second electrode fingers. An intersecting region of the first and second electrode fingers includes a central region and first and second edge regions on outer side portions of the central region. An acoustic velocity in the first and second edge regions is lower than that in the central region, and the acoustic wave resonators include a first acoustic wave resonator with a width in the first and second edge regions larger than a width in the central region, and a second acoustic wave resonator including at least one of an acoustic velocity reducing film and an acoustic velocity increasing film in the central region, such that an acoustic velocity in the first and second edge regions is lower than acoustic velocity in the center region.