US Patent Application 18341775. ACOUSTIC WAVE DEVICE, FILTER DEVICE, AND METHOD OF MANUFACTURING ACOUSTIC WAVE DEVICE simplified abstract

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ACOUSTIC WAVE DEVICE, FILTER DEVICE, AND METHOD OF MANUFACTURING ACOUSTIC WAVE DEVICE

Organization Name

Murata Manufacturing Co., Ltd.


Inventor(s)

Yutaka Kishimoto of Nagaokakyo-shi (JP)

Masashi Omura of Nagaokakyo-shi (JP)

Shintaro Kubo of Nagaokakyo-shi (JP)

Hajime Yamada of Nagaokakyo-shi (JP)

ACOUSTIC WAVE DEVICE, FILTER DEVICE, AND METHOD OF MANUFACTURING ACOUSTIC WAVE DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18341775 titled 'ACOUSTIC WAVE DEVICE, FILTER DEVICE, AND METHOD OF MANUFACTURING ACOUSTIC WAVE DEVICE

Simplified Explanation

The patent application describes an acoustic wave device with a piezoelectric substrate and electrodes.

  • The device includes a piezoelectric layer and a hollow portion.
  • The piezoelectric layer has three regions in plan view: a first region that overlaps the electrodes and the hollow portion, a second region that surrounds the first region, and a third region that overlaps the hollow portion and is located between the first and second regions.
  • The border between the first and third regions in the cross-sectional shape of the device has a curved-surface shape.


Original Abstract Submitted

An acoustic wave device that includes a piezoelectric substrate that has a piezoelectric layer and a hollow portion, and first and second electrodes and. The piezoelectric layer has a first region that overlaps the first and second electrodes and the hollow portion in plan view, a second region that does not overlap the hollow portion and surrounds the first region in plan view, and a third region that overlaps the hollow portion and is located between the first region and the second region in plan view. A portion including the border between the first region and the third region of a cross-sectional shape in a lamination direction of the piezoelectric substrate includes a curved-surface shape.

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