Elastic Wave Device and Module Using Elastic Wave Device
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United States of America
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Issued Date -
Apr 3, 2025
app pub date -
Sep 30, 2024
filing date -
Sep 30, 2024
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Abstract
The present application relates to an elastic wave device and a module using the elastic wave device. The elastic wave device comprises a supporting substrate; a dielectric layer formed on the supporting substrate; an insulating layer formed on the dielectric layer; a piezoelectric layer formed on the insulating layer; and a resonator including IDT electrodes formed on the piezoelectric layer. The dielectric layer includes a first strip-shaped acoustic impedance region with a long side direction and a short side direction; and a second strip-shaped acoustic impedance region arranged alternately with the first acoustic impedance region and having a different acoustic impedance from that of the first acoustic impedance region. The elastic wave device of this application provides good temperature characteristics and effectively suppresses spurious response.
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