ACOUSTIC WAVE FILTER DEVICE
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United States of America
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Issued Date -
Oct 31, 2024
app pub date -
Jul 9, 2024
filing date -
Jul 9, 2024
priority date (Note) -
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status (Latency Note)
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Abstract
A duplexer includes a piezoelectric substrate including an upper surface and a lower surface, a functional element on the lower surface, a flat plate electrode on a side of the upper surface of the piezoelectric substrate, and a dielectric portion that is located between the functional element and the flat plate electrode and has a permittivity lower than a permittivity of the piezoelectric substrate.
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