Title:
METHOD FOR ADJUSTING FREQUENCY OF PIEZOELECTRIC VIBRATION DEVICE AND PIEZOELECTRIC VIBRATION DEVICE
Document Type and Number:
Japanese Patent JP2023132930
Kind Code:
A
Abstract:
To provide a method for adjusting the frequency of a piezoelectric vibration device capable of suppressing decrease in frequency adjustment amount due to laser irradiation.SOLUTION: A method for adjusting the frequency of crystal oscillator 100 includes: a frequency adjustment metal film 36 is formed, comprising a base metal layer 36a, a first metal layer 36b, and a second metal layer 36c, on a first principal surface 301 opposite to a second excitation electrode 112 of a second sealing member 30. The second metal layer 36c has a higher melting temperature than the first metal layer 36b and has an opening. Frequency adjustment is performed by: irradiating the frequency adjustment metal film 36 with a laser from outside the second sealing member 30; heating the base metal layer 36a by allowing a laser to penetrate inside the second sealing member 30; melting and vaporizing at least a portion of the first metal layer 36b; and attaching it to the second excitation electrode 112.SELECTED DRAWING: Figure 11
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Inventors:
MARUMOTO MANABU
Application Number:
JP2022038532A
Publication Date:
September 22, 2023
Filing Date:
March 11, 2022
Export Citation:
Assignee:
DAISHINKU CORP
International Classes:
H03H3/04; H03H9/02
Attorney, Agent or Firm:
Patent Attorney Corporation ARK Office