Acoustic wave elements and antenna duplexers, and modules and electronic devices using same
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United States of America Patent
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Apr 25, 2017
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N/A
app pub date -
Jul 28, 2015
filing date -
Jul 28, 2014
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Abstract
An acoustic wave element according to certain examples includes a piezoelectric body, an interdigital transducer (IDT) electrode disposed above the piezoelectric body, and a connection electrode disposed above the piezoelectric body and connected to the IDT electrode. A first insulation layer covers the connection electrode, and a second insulation layer covers the IDT electrode. The first insulation layer disposed above the connection electrode has a first thickness T in a direction perpendicular to an upper surface of the piezoelectric body and the second insulation layer disposed above the IDT electrode has a second thickness K in the direction perpendicular to the upper surface of the piezoelectric body. The first thickness T is less than the second thickness K.
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