Title:
PIEZOELECTRIC VIBRATION DEVICE AND METHOD FOR ADJUSTING FREQUENCY OF PIEZOELECTRIC VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/140070
Kind Code:
A1
Abstract:
Provided is a method for adjusting the frequency of a quartz oscillator (100), wherein: a metal film (36) for frequency adjustment that comprises a base metal layer (36a) and a metal layer (36b) layered thereon is formed on a first principal surface (301) of a second sealing member (30) facing a second excitation electrode (112); and the second sealing member (30) is formed from quartz. Frequency adjustment is performed by: irradiating the metal film (36) for frequency adjustment with a laser from outside the second sealing member (30); and allowing the laser to pass through the interior of the second sealing member (30) to heat the base metal layer (36a) so that at least part of the metal layer (36b) is caused to vaporize, by melting, and adhere to the second excitation electrode (112). At such time, the melting temperature of the base metal layer (36a) is higher than the melting temperature of the metal layer (36b), and the difference between the melting temperatures of the base metal layer (36a) and the metal layer (36b) is at least 1500K.
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Inventors:
MARUMOTO MANABU (JP)
Application Number:
PCT/JP2022/048143
Publication Date:
July 27, 2023
Filing Date:
December 27, 2022
Export Citation:
Assignee:
DAISHINKU CORP (JP)
International Classes:
H03H3/04; H03H9/02
Foreign References:
| JP2011250225A | 2011-12-08 | |||
| JP2003060470A | 2003-02-28 | |||
| JP2010283526A | 2010-12-16 | |||
| JPH09172348A | 1997-06-30 | |||
| JP2015119467A | 2015-06-25 |
Attorney, Agent or Firm:
ARC PATENT ATTORNEYS' OFFICE (JP)
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