Acoustic wave device, radio-frequency front-end circuit, and communication apparatus

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United States of America Patent

PATENT NO 11159141
APP PUB NO 20200186119A1
SERIAL NO

16707155

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Abstract

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An acoustic wave device includes a high-acoustic-velocity film, a piezoelectric layer provided directly or indirectly on the high-acoustic-velocity film, an IDT electrode provided on the piezoelectric layer, and a dielectric film provided on the piezoelectric layer to cover the IDT electrode. An acoustic velocity of bulk waves propagating through the high-acoustic-velocity film is higher than an acoustic velocity of acoustic waves propagating through the piezoelectric layer. The dielectric film includes a material including hydrogen atoms.

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Patent Owner(s)

  • MURATA MANUFACTURING CO LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Takahashi, Hideaki Nagaokakyo, JP 907 5840
Takai, Tsutomu Nagaokakyo, JP 41 278
Yamamoto, Koji Nagaokakyo, JP 383 3467

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