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:
Jan. 06, 2026
Filed:
Apr. 20, 2022
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Yasunobu Hayashi, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
An acoustic wave device includes a piezoelectric substrate and an electrode on the piezoelectric substrate and including first and second layers. The first layer includes Al and Cu. The second layer is on a side opposite to a piezoelectric substrate side of the first layer and includes Al. The first layer includes an Al crystal and at least a portion of CuAlcrystal grains that are provided in a direction orthogonal or substantially orthogonal to a thickness direction of the piezoelectric substrate. In the electrode, the CuAlcrystal grains do not extend to the main surface of the second layer on a side opposite to a first layer side.