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:
Jul. 20, 2021
Filed:
Oct. 24, 2018
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Yasumasa Taniguchi, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
An elastic wave device includes a piezoelectric material layer, an IDT electrode on the piezoelectric material layer, and a dielectric film covering the IDT electrode. The IDT electrode includes a first electrode layer and a second electrode layer laminated on the first electrode layer. Each of wavelength normalized film thicknesses of the first and second electrode layers is equal to or greater than about 1.25%, and is normalized using a wave length defined by the electrode finger pitch of the IDT electrode. The second electrode layer has a density lower than that of the first electrode layer. The side of the second electrode layer is inclined with respect to the thickness direction of the IDT electrode.