Surface acoustic wave device

A surface acoustic wave device is provided which can increase the acoustic velocity of a surface acoustic wave the electromechanical coupling coefficient k 2 , and which is inexpensive. A surface acoustic wave device (1) includes a piezoelectric substrate in which a LiNbO 3 single-crystal plate (3)...

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Bibliographic Details
Main Author KADOTA MICHIO
Format Patent
LanguageEnglish
Published 01.04.2015
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:A surface acoustic wave device is provided which can increase the acoustic velocity of a surface acoustic wave the electromechanical coupling coefficient k 2 , and which is inexpensive. A surface acoustic wave device (1) includes a piezoelectric substrate in which a LiNbO 3 single-crystal plate (3) having Euler angles (0°, 67° to 160°, -5° to +5°) or (90°, 51° to 133°, -5° to +5°) is formed on a high acoustic-velocity substrate (2) in which an acoustic velocity of a transverse wave is 5400 m/sec or higher and 8660 m/sec or lower, and an electrode (4) formed on the piezoelectric substrate and made of metal.
Bibliography:Application Number: CN201080045849