Title:
FREQUENCY ADJUSTING METHOD FOR PIEZOELECTRIC VIBRATION DEVICE AND PIEZOELECTRIC VIBRATION DEVICE
Document Type and Number:
Japanese Patent JP2023125801
Kind Code:
A
Abstract:
To provide a frequency adjusting method for a piezoelectric vibration device that makes it possible to suppress a molten metal layer from remaining on an underlying metal layer as a ball-shaped lump.SOLUTION: In a frequency adjusting method for a quartz crystal oscillator 100, a metal film 36 for adjusting frequency composed of an underlying metal layer 36a and a metal layer 36b stacked on top of the underlying metal layer 36a is formed on a first main surface 301 opposing to a second excitation electrode 112 of a second sealing member 30, and the second sealing member 30 is made of crystal. The metal film 36 for adjusting frequency is irradiated with a laser from an external source of the second sealing member 30 at a plurality of locations at a predetermined interval. By transmitting the laser through the inside of the second sealing member 30 to heat the underlying metal layer 36a, at least a portion of the metal layer 36b is evaporated by melting and is adhered to the second excitation electrode 112 so that a frequency is adjusted.SELECTED DRAWING: Figure 10
Inventors:
MARUMOTO MANABU
Application Number:
JP2022030102A
Publication Date:
September 07, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
DAISHINKU CORP
International Classes:
H03H3/04; H03H9/02
Attorney, Agent or Firm:
Patent Attorney Corporation ARK Office
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