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. 15, 2025
Filed:
Jun. 29, 2022
Transversely-excited film bulk acoustic resonators with structures to reduce acoustic energy leakage
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Ventsislav Yantchev, Sofia, BG;
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Abstract
Acoustic resonators, acoustic filter devices and methods of making the same are provided. An acoustic resonator device includes a piezoelectric layer having front and back surfaces, and an interdigital transducer (IDT) on a surface and including interleaved fingers. An overlapping distance of the interleaved fingers defines an aperture of the acoustic resonator device. The device further includes a fast region between the aperture and a busbar of the IDT. The piezoelectric layer and the IDT are configured such that a radio frequency signal applied to the IDT excites a primary shear acoustic mode having a first frequency in the piezoelectric layer within a central portion of the aperture and a primary shear acoustic mode having a second frequency in the fast region. The second frequency is higher than the first frequency.