Is a
Patent attributes
Patent Applicant
Patent Jurisdiction
Patent Number
Date of Patent
October 3, 2017
Patent Application Number
13920344
Date Filed
June 18, 2013
Patent Citations Received
Patent Primary Examiner
Patent abstract
An elastic wave device propagating plate waves includes a stack of an acoustic reflection layer, a piezoelectric layer, and IDT electrode on a supporting substrate. The piezoelectric layer is thinner than a period of fingers of the IDT electrode. The acoustic reflection layer includes low-acoustic-impedance layers and high-acoustic-impedance layers. The low-acoustic-impedance layers are made of SiO2, and the high-acoustic-impedance layers are made of at least one material selected from the group consisting of W, LiTaO3, Al2O3, AlN, LiNbO3, SiN, and ZnO.
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