JP2001111379A - Manufacturing method of sealing tube for crystal oscillator - Google Patents
Manufacturing method of sealing tube for crystal oscillatorInfo
- Publication number
- JP2001111379A JP2001111379A JP28363499A JP28363499A JP2001111379A JP 2001111379 A JP2001111379 A JP 2001111379A JP 28363499 A JP28363499 A JP 28363499A JP 28363499 A JP28363499 A JP 28363499A JP 2001111379 A JP2001111379 A JP 2001111379A
- Authority
- JP
- Japan
- Prior art keywords
- sealing tube
- heat treatment
- crystal oscillator
- manufacturing
- nickel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は表面にニッケルメッ
キを施した水晶振動子用封止管の製造方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a sealing tube for a quartz crystal resonator, the surface of which is plated with nickel.
【０００２】[0002]
【従来の技術】リフロー炉等によるはんだ付けができる
ようにするため、耐熱性を向上した表面実装タイプ水晶
振動子が実用化されている。図１は本発明に係わる水晶
振動子の分解斜視図である。１は封止管、２は気密端
子、３はリード、４は水晶片、５は水晶片に形成された
電極である。水晶振動子は、水晶片４が気密端子２に埋
設されたリード３のインナーリード３ａに固定され、水
晶片４が固定された気密端子２を封止管１に圧入封止し
て完成されるシリンダータイプ水晶振動子である。2. Description of the Related Art In order to enable soldering in a reflow furnace or the like, a surface mount type crystal unit having improved heat resistance has been put to practical use. FIG. 1 is an exploded perspective view of a crystal unit according to the present invention. 1 is a sealing tube, 2 is an airtight terminal, 3 is a lead, 4 is a crystal piece, and 5 is an electrode formed on the crystal piece. The crystal resonator is completed by fixing the crystal blank 4 to the inner lead 3a of the lead 3 embedded in the airtight terminal 2 and press-fitting the airtight terminal 2 to which the crystal blank 4 is fixed into the sealing tube 1. It is a cylinder type crystal oscillator.
【０００３】図２は表面実装対応したシリンダータイプ
水晶振動子の側面図である。前述のように完成されたシ
リンダータイプ水晶振動子は、リード３を所定形状に折
り曲げて、表面実装に対応するように図２の如く成形さ
れる。表面実装において、回路基板への水晶振動子搭載
は他の電子部品と同様自動機であるマウンターが使用さ
れ、リフロー炉内ではんだ付けがなされる。この際、封
止管をアースするために直接回路パターンにはんだ付け
される。FIG. 2 is a side view of a cylinder type crystal unit which is compatible with surface mounting. The cylinder type crystal resonator completed as described above is formed as shown in FIG. 2 by bending the lead 3 into a predetermined shape and corresponding to surface mounting. In surface mounting, a quartz oscillator is mounted on a circuit board using a mounter which is an automatic machine like other electronic components, and is soldered in a reflow furnace. At this time, it is soldered directly to the circuit pattern to ground the sealing tube.
【０００４】リフロー炉内では水晶振動子が２４０〜２
６０℃の高温雰囲気に晒されるので、水晶振動子は耐熱
性を向上しておかなければならない。図３は気密端子の
断面図である。気密端子２は外周金属部６、ガラス７、
リード３、外周金属部６に施されたメッキ８で構成され
ているが、前記高温雰囲気中の晒されてもよいように、
メッキ８は高温はんだ（例えば鉛：残部＝９：１）を使
用している。高温はんだメッキは外周金属部６と同時に
リード３にもされるが、高温はんだメッキはリフロー時
のはんだ付け性が良くないため、更に共晶はんだメッキ
を施すことがある。一方、封止管も耐熱性を得るため、
一般に素材表面にニッケルメッキを施している。[0004] In a reflow furnace, the crystal oscillator is 240-2.
Since the crystal unit is exposed to a high temperature atmosphere of 60 ° C., the heat resistance of the crystal unit must be improved. FIG. 3 is a sectional view of the hermetic terminal. The hermetic terminal 2 has an outer peripheral metal part 6, glass 7,
Although the lead 3 and the outer peripheral metal portion 6 are formed by plating 8, the lead 3 may be exposed in the high-temperature atmosphere.
The plating 8 uses a high-temperature solder (for example, lead: remainder = 9: 1). High-temperature solder plating is applied to the leads 3 at the same time as the outer peripheral metal portion 6. However, since high-temperature solder plating has poor solderability during reflow, eutectic solder plating may be further applied. On the other hand, in order to obtain heat resistance of the sealing tube,
Generally, the material surface is plated with nickel.
【０００５】[0005]
【発明が解決しようとする課題】封止管は封止する前に
真空熱処理をするが、ニッケルメッキを施した封止管は
真空熱処理を行なう前に表面被膜（酸化被膜等）が形成
され、真空熱処理の条件によっては表面被膜の形成が促
進される。表面被膜が形成されることにより、はんだ付
け性が悪くなる。The sealing tube is subjected to a vacuum heat treatment before sealing, but the nickel-plated sealing tube is formed with a surface film (an oxide film or the like) before performing the vacuum heat treatment. Depending on the conditions of the vacuum heat treatment, the formation of a surface film is promoted. The formation of the surface coating deteriorates the solderability.
【０００６】はんだ付けが不良になると封止管のアース
が取れなくなり、発振周波数が不安定になることがあっ
た。[0006] If the soldering becomes defective, the grounding of the sealing tube cannot be taken, and the oscillation frequency may become unstable.
【０００７】[0007]
【課題を解決するための手段】表面にニッケルメッキを
施した水晶振動子用封止管を、真空熱処理炉内圧力を
６．６５Ｐａ以下の圧力（真空）にして熱処理をする。Means for Solving the Problems A sealed tube for a crystal unit, whose surface is nickel-plated, is heat-treated at a pressure (vacuum) of 6.65 Pa or less in a vacuum heat treatment furnace.
【０００８】[0008]
【発明の実施の形態】図４は本発明に係わる封止管の断
面図である。封止管９の表面にニッケルメッキ１０が施
されているが、ニッケルメッキ１０の表面には次第に被
膜１１が形成される。本発明の水晶振動子用封止管の製
造方法では、封止管９の熱処理は、真空熱処理内の圧力
を６．６５Ｐａ以下にして行なうこととした。その他の
真空熱処理の条件は、熱処理温度を２００℃、熱処理時
間は７２時間で行なった。FIG. 4 is a sectional view of a sealing tube according to the present invention. Nickel plating 10 is applied to the surface of the sealing tube 9, and a coating 11 is gradually formed on the surface of the nickel plating 10. In the method of manufacturing a sealed tube for a crystal resonator according to the present invention, the heat treatment of the sealed tube 9 is performed by setting the pressure in the vacuum heat treatment to 6.65 Pa or less. Other conditions of the vacuum heat treatment were a heat treatment temperature of 200 ° C. and a heat treatment time of 72 hours.
【０００９】図５は、真空熱処理炉内圧力とはんだ付け
不良発生率を示すグラフである。真空熱処理炉内圧力を
１．３３〜６６５００Ｐａの範囲で封止管の真空熱処理
を行ない、回路基板搭載後、リフロー炉にてはんだ付け
の確認をした。グラフに示すとおり、真空熱処理炉内圧
力とはんだ付け不良発生率には相関があることが分か
る。そして、真空熱処理内圧力を６．６５Ｐａ以下にし
て熱処理をするとはんだ付け不良が発生しないことが分
かった。FIG. 5 is a graph showing the pressure in the vacuum heat treatment furnace and the rate of occurrence of defective soldering. Vacuum heat treatment of the sealing tube was performed at a pressure in the vacuum heat treatment furnace of 1.33 to 66500 Pa, and after mounting the circuit board, soldering was confirmed in a reflow furnace. As shown in the graph, it can be seen that there is a correlation between the pressure in the vacuum heat treatment furnace and the incidence of defective soldering. And it turned out that a soldering failure does not generate | occur | produce when heat processing is carried out by setting the pressure in a vacuum heat treatment to 6.65 Pa or less.
【００１０】[0010]
【発明の効果】耐熱性を高めるために表面にニッケルメ
ッキをした封止管でも、本発明の製造方法によりはんだ
付け不良の発生を押さえることができるようになった。According to the manufacturing method of the present invention, occurrence of defective soldering can be suppressed even in a sealing tube whose surface is nickel-plated in order to enhance heat resistance.
【図１】本発明に係わる水晶振動子の分解斜視図FIG. 1 is an exploded perspective view of a crystal resonator according to the present invention.
【図２】表面実装対応したシリンダータイプ水晶振動子
の側面図FIG. 2 is a side view of a cylinder-type crystal unit compatible with surface mounting.
【図３】気密端子の断面図FIG. 3 is a sectional view of an airtight terminal.
【図４】本発明に係わる封止管の断面図FIG. 4 is a sectional view of a sealing tube according to the present invention.
【図５】真空熱処理炉内圧力とはんだ付け不良発生率を
示すグラフFIG. 5 is a graph showing the pressure inside the vacuum heat treatment furnace and the incidence of soldering defects.
１ 封止管 ２ 気密端子 ３ リード ３ａ インナーリード ４ 水晶片 ５ 電極 ６ 外周金属部 ７ ガラス ８ メッキ部 ９ 封止管 １０ ニッケルメッキ部 １１ 表面被膜 DESCRIPTION OF SYMBOLS 1 Sealing tube 2 Airtight terminal 3 Lead 3a Inner lead 4 Crystal piece 5 Electrode 6 Outer peripheral metal part 7 Glass 8 Plating part 9 Sealing tube 10 Nickel plating part 11 Surface coating
Claims (1)
子用封止管を、炉内圧力を６．６５Ｐａ以下の圧力にし
て熱処理することを特徴とする水晶振動子用封止管の製
造方法。1. A method for manufacturing a sealed tube for a quartz oscillator, wherein the sealed tube for a quartz oscillator having a nickel plated surface is heat-treated at a furnace pressure of 6.65 Pa or less. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28363499A JP2001111379A (en) | 1999-10-05 | 1999-10-05 | Manufacturing method of sealing tube for crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28363499A JP2001111379A (en) | 1999-10-05 | 1999-10-05 | Manufacturing method of sealing tube for crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001111379A true JP2001111379A (en) | 2001-04-20 |
Family
ID=17668068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28363499A Pending JP2001111379A (en) | 1999-10-05 | 1999-10-05 | Manufacturing method of sealing tube for crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001111379A (en) |
-
1999
- 1999-10-05 JP JP28363499A patent/JP2001111379A/en active Pending
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