Acoustic wave devices, and antenna duplexers, modules, and communication devices using same
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United States of America Patent
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Apr 18, 2017
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N/A
app pub date -
Jul 1, 2015
filing date -
Jul 7, 2014
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Abstract
An elastic wave device including a substrate, an interdigital transducer (IDT) electrode provided on an upper surface of the substrate, a first wiring electrode provided on the upper surface of the substrate and connected to the IDT electrode, a dielectric film that does not cover a first region of the first wiring electrode but covers a second region of the first wiring electrode above the substrate, the first wiring electrode including a cutout in the second region, and a second wiring electrode that covers an upper surface of the first wiring electrode in the first region and an upper surface of the dielectric film in the second region above the substrate.
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