ACOUSTIC DEVICES WITH INTEGRATED CIRCUIT ELEMENTS AND RELATED FABRICATION METHODS
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United States of America
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Issued Date -
Feb 6, 2025
app pub date -
Aug 1, 2023
filing date -
Aug 1, 2023
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Abstract
An acoustic device includes circuit elements, such as analog circuit components, between the first and second substrate and coupled to an acoustic resonator to form an acoustic filter within the acoustic device. In some examples, forming the circuit elements between the first substrate and the second substrate includes forming the first circuit elements in insulating material on the second substrate before coupling the second substrate to a first side of the first substrate. The circuit elements disposed between the first and second substrates may include capacitors, inductors, and electrical interconnects coupled to the acoustic resonator on the first substrate. Additional features may be included in the insulating material. The acoustic device avoids the need for bulky analog components coupled to the acoustic resonator via long interconnects through a package substrate, making it possible to reduce an acoustic device's package size.
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