Title:
ELASTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/060512
Kind Code:
A1
Abstract:
Provided is an elastic wave device that makes it possible to achieve size reduction but also increase Q value and that also makes it possible to adjust resonant frequency. An elastic wave device (1) that comprises a piezoelectric layer (4), a first electrode (51), and a second electrode (52). The first electrode (51) and the second electrode (52) are opposite in a direction (D2) that intersects the thickness direction (D1) of the piezoelectric layer (4). The elastic wave device (1) uses thickness shear primary mode bulk waves. The elastic wave device (1) comprises a first resonator and a second resonator. The first resonator and the second resonator each have a first electrode (51), a second electrode (52), and an installation region (400) that is a portion of the piezoelectric layer (4) that includes an installation area in which the first electrode (51) and the second electrode (52) are provided. The thickness of each of the first resonator and the second resonator excludes the thickness of the first electrode (51) and the second electrode (52) that are included in the resonator. The thickness of the first resonator and the thickness of the second resonator are different.
Inventors:
YAMANE TAKASHI
NAGATOMO SHOU
KIMURA TETSUYA
DAIMON KATSUYA
KOYANAGI TAKUYA
NAGATOMO SHOU
KIMURA TETSUYA
DAIMON KATSUYA
KOYANAGI TAKUYA
Application Number:
PCT/JP2020/036400
Publication Date:
April 01, 2021
Filing Date:
September 25, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01L41/047; H01L41/187; H01L41/316; H03H9/145; H03H9/25
Domestic Patent References:
| WO2012073871A1 | 2012-06-07 |
Foreign References:
| JP2018007239A | 2018-01-11 | |||
| JP2013528996A | 2013-07-11 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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