ACOUSTIC WAVE DEVICE
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
Oct 17, 2024
filing date -
Oct 17, 2024
priority date (Note) -
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Abstract
An acoustic wave device includes acoustic wave resonators including one or more series arm resonators and one or more parallel arm resonators. The acoustic wave resonators include a support including a support substrate with a thickness in a first direction, a piezoelectric layer in the first direction of the support, an IDT electrode on one principal surface of the piezoelectric layer, a first dielectric film on the one principal surface, and a second dielectric film on the first dielectric film. A thickness of one of the first dielectric films is larger than a thickness of another one of the first dielectric films. A thickness of one of the second dielectric films is smaller than a thickness of another one of the second dielectric films.
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