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:
May. 13, 2025
Filed:
Apr. 18, 2023
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Masashi Omura, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo, JP;
Abstract
An acoustic wave device includes a support substrate, and a piezoelectric layer provided on the support substrate. The piezoelectric layer has a first main surface opposite to a second main surface. The piezoelectric layer also includes a first direction orthogonal to a second direction. A first electrode is provided on the piezoelectric layer's first main surface, and a second electrode is provided on the piezoelectric layer's second main surface to face the first electrode. An energy confining portion is provided between the support substrate and the piezoelectric layer. The piezoelectric layer is anisotropic with respect to a coefficient of linear expansion, and in the piezoelectric layer, a coefficient of linear expansion in the first direction is different from a coefficient of linear expansion in the second direction. At least one of the piezoelectric layer, the first electrode, and the second electrode is parallel to the first direction.