Title:
PIEZOELECTRIC VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/024741
Kind Code:
A1
Abstract:
In a crystal oscillator 101, hermetic sealing is performed by sandwiching a crystal vibration plate 2, on which first and second excitation electrodes 221, 222 are formed, between first and second sealing members 3, 4 disposed above and below the crystal vibration plate, and joining respective sealing portions thereof. In the first sealing member 3, a fourth through-hole 323 penetrating from a first principal surface 311 side to a second principal surface 312 side is formed, the opening area of an opening 323a on the first principal surface 311 side of the fourth through-hole 323 is formed larger than the opening area of an opening 323b on the second principal surface 312 side, and the width W2 of a sealing surface-side opening peripheral electrode 323c is larger than the width W1 of an outer surface-side opening peripheral electrode 37a in a Z'-axis direction.
Inventors:
FUJIWARA HIROKI (JP)
Application Number:
PCT/JP2023/027051
Publication Date:
February 01, 2024
Filing Date:
July 24, 2023
Export Citation:
Assignee:
DAISHINKU CORP (JP)
International Classes:
H03H9/02
Foreign References:
| JP2009164776A | 2009-07-23 | |||
| JP2016206202A | 2016-12-08 | |||
| JP2005216544A | 2005-08-11 |
Attorney, Agent or Firm:
ARC PATENT ATTORNEYS' OFFICE (JP)
Download PDF:
Previous Patent: COMMUNICATION CONTROL METHOD
Next Patent: IN VITRO CULTURING METHOD FOR INDUCING OVARIAN FOLLICLES FROM FETAL OVARIAN CELLS OF PRIMATE
Next Patent: IN VITRO CULTURING METHOD FOR INDUCING OVARIAN FOLLICLES FROM FETAL OVARIAN CELLS OF PRIMATE