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. 10, 2026
Filed:
Nov. 16, 2022
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Masakazu Mimura, Nagaokakyo, JP;
Soichiro Tegawa, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
An acoustic wave device includes a piezoelectric substrate and an IDT electrode including electrode fingers, a barrier layer on the piezoelectric substrate, and a first layer on the barrier layer, and including Cu as a main component. The first layer includes a first principal surface on a side closest to the piezoelectric substrate, a second principal surface opposite to the first principal surface, and a side surface connected to the first principal surface and the second principal surface. The barrier layer covers the first principal surfaceand the side surface of the first layer. A thickness of a portion of the barrier layer covering the first principal surface of the first layer is smaller than a thickness of a portion of the barrier layer covering the side surface of the first layer.