Package for glass sealing of piezoelectric vibrator

A technology of glass sealing and piezoelectric vibrators, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc.

Inactive Publication Date: 2015-11-25
NIHON DEMPA KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Therefore, there is a problem that, when the crystal resonator is viewed from above, the sealing glass spread and fused inside the cover is provided at a position facing the crystal piece mounted on the ceramic base and the electrodes formed on the crystal piece, as if It has the same configuration as a seam-welded hermetic package using a metal lid (lid)

Method used

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  • Package for glass sealing of piezoelectric vibrator
  • Package for glass sealing of piezoelectric vibrator
  • Package for glass sealing of piezoelectric vibrator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] As shown in FIG. 4(a), in Example 1 of the glass sealing package of the piezoelectric vibrator of the present invention, the ground terminal #2 and the ground terminal #4 of the external terminals 5 are close to each other, and at least the sealing surface S is formed A conductor 10a, the figure 4(a) is obtained by observing the sealing surface S and cavity C of the ceramic base 2 from the obliquely above after removing the ceramic cover 3 and the crystal piece 7 from the ceramic base 2.

[0068] Furthermore, as shown in FIG. 5(a), the conductor 10a and the through electrode 11 may be formed integrally or separately, and the through electrode 11 is formed in a through hole formed by penetrating the ceramic base 2 in the longitudinal direction. 11a. What is necessary is just to be formed so that it can electrically connect the ground terminal #2 and the ground terminal #4 of the external terminal 5, or any one of them.

[0069] Here, the material of the conductor 10a may be ...

Embodiment 2

[0073] As shown in Figure 4(b), in Example 2 of the glass sealing package of the piezoelectric vibrator of the present invention, it is close to the ground terminal #2 or ground terminal #4 of the external terminals 5, and is formed on the ceramic base 2 of the four corners of the castle-shaped structure 2a, as shown in FIG. 5(b), at least one conductor 10b is formed by metalize printing so as to be electrically connected to the connection terminal 5a, the FIG. 4(b) ) Is obtained by removing the ceramic cover 3 and the crystal piece 7 from the ceramic base 2, and observing the sealing surface S and the cavity C of the ceramic base 2 from an obliquely above, as in the above-mentioned Example 1.

[0074] Therefore, in this way, the conductor 10b formed in the castle-shaped structure 2a is joined to the ceramic cover 3 via the sealing material 4 containing low-melting glass, and the two external terminals 5 functioning as ground terminals or either one of them and the ceramic The co...

Embodiment 3

[0076] As shown in FIG. 4(c), in Example 3 of the glass sealing package of the piezoelectric vibrator of the present invention, it is close to the ground terminal #2 or the ground terminal #4 of the external terminals 5, and is formed on the ceramic base Any one of the inner four corners (recesses) of the cavity C in the center of 2 is shown in FIG. 5(c). The conductor 10c is formed by metallization printing, and the conductor 10c penetrates the connection terminal 5a and the ceramic base 2 and electrically connected to the connection terminal 5a penetrating and extending to the inner bottom surface of the cavity C. The Fig. 4(c) is the same as in the first embodiment. The ceramic cover 3 and the crystal piece are removed from the ceramic base 2 After 7, observe the sealing surface S and cavity C of the ceramic base 2 from diagonally above.

[0077] Therefore, in this way, the conductors 10c formed in the recesses 2 at the inner four corners of the cavity C are joined to the cera...

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Abstract

The invention relates to a package for glass sealing of a piezoelectric vibrator. The package for glass sealing of the piezoelectric vibrator has a main surface of a ceramic base of a castle-shaped structure, and the main surface is rectangular in a plan view, is formed at four corners of the package and carries a piezoelectric element. The package for glass sealing includes: holding electrodes of a piezoelectric element, which are formed on a main surface in a cavity of the ceramic base; external terminals arranged at four corners of an external bottom surface of the ceramic base; and a ceramic cover which covers the ceramic base and hermetically seals the inside of the ceramic base with a sealing surface using low-melting-point glass. According to the package for glass sealing of the piezoelectric vibrator, an electric conductor which is electrically connected to any of the two external terminals that serves as a grounding terminal is arranged on the ceramic base, and via the electric conductor, two or any of the external terminals which serves as the grounding terminal is electrically connected with the ceramic cover.

Description

Technical field [0001] The present invention relates to a package for glass sealing of a piezoelectric vibrator. The package for glass sealing is on a ceramic base of the piezoelectric vibrator, and a low-melting glass containing a metal component is used to make a ceramic material The formed ceramic cover (ceramiccover) is hermetically sealed. The glass sealing package is provided with a conductor on the ceramic base. The conductor connects the ground (GND) terminal provided on the outer bottom surface of the ceramic base with the ceramic cover. It is connected to reduce the influence of capacitance change or noise near the circuit board of the piezoelectric vibrator and prevent abnormal operation of the circuit board. Background technique [0002] As shown in the perspective view of FIG. 6(a) and FIG. 6(b) which is a cross-sectional view in the direction of the BB arrow in FIG. 6(a), the conventional piezoelectric vibrator, for example, the ceramic package 21 for crystal resona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/053
Inventor 大竹浩実久保拓也
Owner NIHON DEMPA KOGYO CO LTD
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