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Piezoelectric vibrator and its fabricating method, piezoelectric oscillator, electronic apparatus and radio wave timepiece

A piezoelectric and vibrator technology, applied in the direction of electrical components, impedance networks, etc., can solve problems such as oscillation instability and frequency offset, and achieve the effect of suppressing the reduction of production efficiency

Inactive Publication Date: 2006-11-22
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these particles stick to the vibrating piece 4, a slight frequency shift occurs, and the oscillation becomes unstable

Method used

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  • Piezoelectric vibrator and its fabricating method, piezoelectric oscillator, electronic apparatus and radio wave timepiece
  • Piezoelectric vibrator and its fabricating method, piezoelectric oscillator, electronic apparatus and radio wave timepiece
  • Piezoelectric vibrator and its fabricating method, piezoelectric oscillator, electronic apparatus and radio wave timepiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] figure 1 is an exploded perspective view showing the configuration of the piezoelectric vibrator according to the first embodiment.

[0065] like figure 1 As shown, the piezoelectric vibrator 6 is composed of an airtight terminal 1, a piezoelectric vibrating piece 4 made of a piezoelectric material such as quartz, and a sealing tube 5 of a cylindrical cylindrical bottom member made of metal. In addition, the airtight terminal 1 includes an annular stem 8 made of metal material, and two lead terminals passing through the stem 8 . The shorter ends of the two lead terminals welded to the piezoelectric vibrating piece 4 and included in the sealed tube 5 constitute the inner lead 2 , and the longer ends protruding to the outside constitute the outer lead 3 . The surface of the lead terminal and the outer edge of the stem 8 are plated.

[0066] The piezoelectric vibrating piece 4 of the present embodiment is a tuning-fork type vibrating piece having a base portion and a ...

Embodiment 2

[0107] Figure 10 is a schematic outline diagram showing the constitution of a tuning fork type quartz crystal oscillator according to the present invention, and is using the tuning fork type quartz crystal oscillator having inner leads and mounting electrodes welded by the welding method explained in Embodiment 1, A plan view of a surface mount piezoelectric oscillator.

[0108] exist Figure 10 In, a tuning-fork type quartz crystal oscillator 51 is set to a predetermined position on a circuit board 52, and an oscillator integrated circuit indicated by reference numeral 53 is mounted adjacent to the quartz crystal oscillator. In addition, electronic components 54 such as capacitors are mounted. The various components are electrically connected by wiring diagrams, not shown. The mechanical vibration of the piezoelectric vibrating piece of the tuning-fork type quartz crystal vibrator 51 is converted into an electrical signal to be input to the integrated circuit 53 by the pi...

Embodiment 3

[0111] Next, an explanation will be given of an example of an electronic device using a piezoelectric vibrator manufactured by the manufacturing method of the present invention. Here, a detailed explanation will be given of a preferred embodiment of a portable information device represented by a portable telephone.

[0112] First, as a premise, the portable information device according to the present embodiment is constructed by developing and improving related art wristwatches. Its appearance is similar to that of a watch, and a liquid crystal display is arranged on its part corresponding to the dial, so that the current time and the like can be displayed on its screen. When used as a communication device, the device is detached from the wrist, and communication similar to that of a related art portable phone is enabled through a speaker and a microphone contained inside the belt portion. However, the device is remarkably small and light in weight compared with the related a...

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PUM

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Abstract

To provide a method of fabricating a piezoelectric vibrator capable of excellently bonding a lead terminal and a piezoelectric vibrating piece despite being small-sized for ensuring an accuracy of a frequency and various properties and reliability of the piezoelectric vibrator, there is provided a method of fabricating a piezoelectric vibrator including an airtight terminal having a lead terminal and a piezoelectric vibrating piece comprising a piezoelectric member and formed with an exciting electrode and a mount electrode at a surface thereof, in which an inner lead of the lead terminal and the mount electrode are bonded, wherein when the inner lead and the mount electrode are bonded, a plasma arc is discharged to a portion of bonding the inner lead and the mount electrode in argon gas to bond the inner lead and the mount electrode by a solder, thereby, a controlled heat amount is locally supplied and therefore, solid bonding can be carried out and the piezoelectric vibrator having high reliability can be provided.

Description

technical field [0001] The present invention relates to a piezoelectric vibrator with a piezoelectric vibrating piece welded to a lead terminal and a manufacturing method thereof, a piezoelectric oscillator, an electronic device, and a radio wave timepiece. Background technique [0002] A piezoelectric vibrator is an electronic component essential to the manufacture of industrial products such as timepieces, oscillators, electronic devices, or the like, and is used as a time source, timing source, or signal reference source. As a package for a piezoelectric vibrator, a cylindrical package is generally used. The configuration of the cylindrical package piezoelectric vibrator will be explained below with reference to the drawings. [0003] Figure 13 is an exploded perspective view showing the internal structure of a cylindrical packaged piezoelectric vibrator, and Figure 14 is a manufacturing flowchart schematically showing the manufacturing of a piezoelectric vibrator. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H9/02H03H3/02H03H9/19
Inventor 佐藤正行福地盛吾富崎淳
Owner SEIKO INSTR INC
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