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:
Aug. 12, 2025
Filed:
May. 23, 2022
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Koji Yamamoto, Nagaokakyo, JP;
Katsuya Daimon, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
An acoustic wave device includes first and second electrode fingers on a piezoelectric layer, and third and fourth electrode fingers and a plurality of fourth electrode fingers are provided on the piezoelectric layer. A connection section includes second and third busbars. The second busbar is on the piezoelectric layer and is connected to one end of each of the second electrode fingers. The third busbar is on the piezoelectric layer and is connected to one end of each of the third electrode fingers. A stress relaxation layer is between the connection section and the piezoelectric layer. The stress relaxation layer does not extend to any of a gap between each of the first electrode fingers and the second busbar and a gap between each of the fourth electrode fingers and the third busbar in a plan view from a thickness direction of a support substrate.