Title:
PIEZOELECTRIC DIAPHRAGM AND PIEZOELECTRIC VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/270543
Kind Code:
A1
Abstract:
A crystal oscillation plate (10) is provided with an oscillating portion (11), an outer frame portion (12) surrounding the periphery of the oscillating portion (11), and a holding portion (13) coupling the oscillating portion (11) and the outer frame portion (12). A plurality of crystalline surfaces are formed on a side surface of the outer frame portion (12) and on a side surface of the holding portion (13), the side surfaces connecting to a connection part between the outer frame portion (12) and the holding portion (13). The crystalline surfaces form a plurality of ridge lines. At least one of a first main surface side and a second main surface side of the connection part between the outer frame portion (12) and the holding portion (13) is provided with an intersection-preventing portion that prevents intersection of two or more of the ridge lines at the connection part.
Inventors:
ONISHI MANABU (JP)
FUJIWARA HIROKI (JP)
FUJIWARA HIROKI (JP)
Application Number:
PCT/JP2022/024902
Publication Date:
December 29, 2022
Filing Date:
June 22, 2022
Export Citation:
Assignee:
DAISHINKU CORP (JP)
International Classes:
H03H9/19
Domestic Patent References:
| WO2019176616A1 | 2019-09-19 |
Foreign References:
| JP2014197728A | 2014-10-16 | |||
| JP2020043484A | 2020-03-19 |
Attorney, Agent or Firm:
ARC PATENT ATTORNEYS' OFFICE (JP)
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