JP2003283280A - Method of manufacturing oscillator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing an oscillator which uses a solder paste, without depositing its solder particulates to an oscillating piece. <P>SOLUTION: The oscillator manufacturing method comprises solidifying once molten solder particulates in a solder paste, remelting the solidified solder, and settling it with an oscillating piece. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrator manufacturing method using a solder paste.

[0002]

2. Description of the Related Art FIG. 1 is a perspective view of a cylindrical crystal resonator 1 according to the present invention. The container of the cylindrical crystal resonator 1 is composed of a sealing tube 2, a metal ring 3, an insulating member 4, two lead wires 5 and the like, and a rectangular crystal piece obtained by processing the crystal into a rectangular shape is housed inside. Has been done.

FIG. 2 is a perspective view of the airtight terminal 6. The airtight terminal 6 includes two lead wires 5 via the insulating member 4 and the metal ring 3
It is fixed to.

FIG. 3 is a perspective view of the internal structure of a cylindrical crystal unit 1 according to the present invention. In the rectangular crystal piece 7, the X-axis direction shown in the drawing is called the rectangular crystal piece lateral direction and the Y-axis direction is called the rectangular crystal piece longitudinal direction, and the rectangular crystal piece plane including the X axis and the Y axis is the main surface. Call. Electrodes 8 are formed on both sides of the main surface, and the two inner lead wires 5A are solder 9
Thus, the rectangular crystal piece 7 is electrically connected to one end of the main surface of the rectangular crystal piece 7 in the longitudinal direction by one-sided support.

FIG. 4 is a sectional view of the airtight terminal 6 to which the solder paste 10 is applied. The solder paste 10 contains solder fine particles 10A and an organic solvent 10B.

FIG. 5 is a sectional view of the solder 9, the airtight terminal 6, and the rectangular crystal piece 7 after heating. After applying the solder paste 10 to the inner lead wires 5A, the rectangular crystal piece 7 is inserted between the inner lead wires 5A and heated. The solder fine particles 10A in the heated solder paste 10 become a solution (melted state) at a liquidus temperature or higher. Then, it becomes solid again below the solidus temperature, and the inner lead wire 5A and the electrode 8 on the rectangular quartz piece 7 are electrically connected and fixed.

As described above, the method of manufacturing a crystal unit using solder includes a step of applying a solder paste to the inner leads, a step of inserting a rectangular crystal piece between the inner leads coated with the solder paste, and then heating. This is a step of melting and solidifying the solder fine particles to electrically connect and fix the inner lead and the electrode on the rectangular crystal piece.

[0008]

When the solder paste containing the fine solder particles and the organic solvent is heated, the organic solvent in the solder paste is boiled due to the temperature rise and bumping occurs.
The bumps cause the fine solder particles to scatter and adhere to the rectangular crystal piece. The attached solder fine particles may adversely affect various characteristics of the vibrator. The present invention aims to solve this problem.

[0009]

A method for manufacturing a vibrator in which two inner leads of an airtight terminal in which two lead wires are fixed to a metal ring via an insulating member and a rectangular crystal piece are fixed by a solder paste. In at least an inner lead, a step of applying a solder paste to the inner lead, a step of heating the applied solder paste to melt and then solidifying, and a step of remelting the solidified solder to fix a rectangular crystal piece Manufacturing method.

In the above-mentioned vibrator manufacturing method, a vibrator having a step of removing solder flux or the like after the step of melting and solidifying or after the step of remelting the solidified solder and fixing it to the rectangular crystal piece. Manufacturing method.

In a method of manufacturing a vibrator, two inner leads of an airtight terminal in which two lead wires are fixed to a metal ring via an insulating member and a rectangular crystal piece are fixed by a solder paste, at least the inner After applying the solder paste to the leads, heating the applied solder paste to solidify it after melting and solidifying, and then applying flux to the solder and remelting the solidified solder to fix the rectangular crystal piece. A method of manufacturing a vibrator, comprising:

In a method of manufacturing a vibrator, in which two inner leads of an airtight terminal in which two lead wires are fixed to a metal ring via an insulating member and a rectangular crystal piece are fixed by a solder paste, at least the inner After applying the solder paste to the leads, heating the applied solder paste to solidify after melting, and solidifying after melting, the process of removing flux etc. of the solder, the process of applying flux to the solder again, and the solidified solder And a step of melting and fixing the rectangular crystal piece.

In a method of manufacturing a vibrator, two inner leads of an airtight terminal in which two lead wires are fixed to a metal ring via an insulating member and a rectangular crystal piece are fixed by a solder paste, at least the inner After applying the solder paste to the leads, heating the applied solder paste to solidify after melting, and melting and solidifying the solder, apply flux to the solder and remelt the solidified solder to fix it to the rectangular crystal piece. A method of manufacturing a vibrator, comprising: a step and a step of removing solder flux and the like.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In step 1, a solder paste 10 is applied to an inner lead wire 5A of an airtight terminal 6. The solder paste 10 to be applied has a Sn: Pb ratio of 63%: 37%,
Eutectic temperature (liquidus temperature and solidus temperature are the same) is about 18
The thing of 3 times was used.

In step 2, the airtight terminal 6 coated with the solder paste 10 is heated to melt and solidify the solder fine particles 10A. The solder fine particles 10A in the solder paste 10 are melted at a liquidus temperature (about 183 ° C.) or higher, are naturally cooled after melting, and are solidified at a solidus temperature (about 183 ° C.) or lower.

In step 2, the organic solvent 10B such as flux in the solder paste 10 is volatilized to some extent by heating, so the organic solvent 10B is applied again. This is because the surface of the solder 9 solidified after melting is covered with an oxide film, and due to the effect, it is difficult to electrically connect and fix with the electrode 8 on the rectangular crystal piece 7, so the step of applying the organic solvent 10B again in order to increase the activity. Should be added, but can be omitted.

In step 3, the rectangular crystal piece 7 is inserted between the inner lead wires 5A of the hermetic terminal 6, and the solder 9 is remelted.
The rectangular crystal piece 7 is solidified and fixed. The solder 9 is melted at a liquidus temperature (about 183 ° C.) or higher, is naturally cooled after melting, and is an electrode 8 on the rectangular crystal piece 7 at a solidus temperature (about 183 ° C.) or lower.
And is solidified with conduction.

The organic solvent 10B such as flux remains on the surface of the solidified solder 9. If the organic solvent 10B remains, it may adversely affect various characteristics of the vibrator. Therefore, it is better to add a step of removing the organic solvent 10B using a chlorine-based solvent or the like.

Although the present invention has been described with reference to the rectangular crystal oscillator, the present invention can be applied to a resonator element using ceramics or the like (single crystal piezoelectric element or the like).

[0020]

According to the present invention, since the fine solder particles in the solder paste are melted and solidified before the lead wire and the electrode on the vibrating piece are electrically connected, the solder fine particles are not deposited on the vibrating piece when soldering the vibrating piece. It does not adhere.

[Brief description of drawings]

FIG. 1 is a perspective view of a cylindrical crystal unit according to the present invention.

FIG. 2 is a perspective view of an airtight terminal.

FIG. 3 is a perspective view of the inside of a cylindrical crystal unit according to the present invention.

FIG. 4 is a sectional view of the solder paste and the airtight terminal before heating.

FIG. 5 is a sectional view of the solder, the airtight terminal, and the rectangular crystal piece after heating.

[Explanation of symbols]

1 Cylindrical crystal unit 2 Sealed tube 3 metal tubes 4 Insulation member 5 lead wires 5A inner lead wire 6 Airtight terminal 7 rectangular crystal pieces 8 electrodes 9 solder 10 Solder paste 10A solder fine particles 10B organic solvent

Claims (5)

[Claims] 1. A vibrator manufacturing method in which two inner leads of an airtight terminal in which two lead wires are fixed to a metal ring via an insulating member and a vibrating piece are fixed by a solder paste, and at least an inner member is provided. A method of manufacturing a vibrator, comprising: a step of applying a solder paste to a lead; a step of heating the applied solder paste to melt it and then solidifying it; and a step of remelting the solidified solder to fix a vibrating piece. . 2. The manufacturing method according to claim 1, wherein a step of removing solder flux or the like is added after the step of melting and solidifying or after the step of remelting the solidified solder and fixing it to the resonator element. And a method of manufacturing a vibrator. 3. The method of manufacturing a vibrator according to claim 1, further comprising a step of applying flux or the like to the solder after the melting and solidifying step. 4. The manufacturing method according to claim 1, wherein after the melting and solidifying step, a step of removing the flux or the like of the solder and a step of again applying the flux or the like to the solder after removing the flux or the like are added. And a method of manufacturing a vibrator. 5. The manufacturing method according to claim 1, wherein after the step of melting and solidifying, the step of applying flux to the solder and the step of remelting the solidified solder and fixing it to the vibrating piece A method of manufacturing a vibrator, which is characterized by adding a step of removing the vibrator.