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. 23, 2021
Filed:
Dec. 06, 2017
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Chihiro Konoma, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
An elastic wave device includes a piezoelectric substrate and an interdigital transducer electrode provided on the piezoelectric substrate. The interdigital transducer electrode includes at least one electrode layer including an outermost electrode layer, and a protective electrode layer protecting the outermost electrode layer, the protective electrode layer has a higher electric resistivity than the outermost electrode layer, the outermost electrode layer includes a first principal surface located at a side opposite to the piezoelectric substrate side, and a side surface connected to the first principal surface, the first principal surface of the outermost electrode layer and a region extending from the first principal surface to at least a portion of the side surface are covered with the protective electrode layer, and the protective electrode layer does not extend beyond a lower edge of the side surface of the outermost electrode layer.