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:
Feb. 10, 2026
Filed:
Mar. 31, 2023
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Ventsislav Yantchev, Sofia, BG;
Sean Mchugh, Santa Barbara, CA (US);
Bryant Garcia, Mississauga, CA;
Patrick Turner, Portola Valley, CA (US);
John P. Koulakis, Los Angeles, CA (US);
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Abstract
A bulk acoustic resonator that includes a substrate, a piezoelectric plate, and an interdigital transducer (IDT) formed on the front surface of the piezoelectric plate. The IDT is configured to excite a primary shear acoustic mode within the piezoelectric plate. Also included is a half-lambda dielectric layer on at least one of the front surface or the back surface of the piezoelectric plate, where a thickness of the half-lambda dielectric layer is related to a wavelength of a fundamental shear bulk acoustic wave resonance in the half-lambda dielectric layer. The device further includes an acoustic Bragg reflector sandwiched between the surface of the substrate and the back surface of the piezoelectric plate, the acoustic Bragg reflector configured to reflect the primary acoustic mode. A top layer of the alternating layers of the acoustic Bragg reflector contacts the piezoelectric plate or the half-lambda dielectric layer.