JP2005229338A - Sealing and manufacturing method of crystal resonator - Google Patents

Sealing and manufacturing method of crystal resonator Download PDF

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Publication number
JP2005229338A
JP2005229338A JP2004036033A JP2004036033A JP2005229338A JP 2005229338 A JP2005229338 A JP 2005229338A JP 2004036033 A JP2004036033 A JP 2004036033A JP 2004036033 A JP2004036033 A JP 2004036033A JP 2005229338 A JP2005229338 A JP 2005229338A
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crystal
crystal resonator
resistance welding
base
frequency
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Katsunori Yanagisawa
勝則 柳沢
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Miyota KK
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Miyota KK
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent outflow of crystal resonators having metal waste stuck to crystal pieces, which has factors inducing deteriorations of oscillation characteristics and electric characteristics such as reduction of a CI value to be not able to maintain reliability. <P>SOLUTION: In a crystal resonator sealing and manufacturing method of joining a base which has a metallic flange in an outer periphery thereof and has a pair of lead wires airtightly insulated with an insulating member between them, and a metallic cap by resistance welding to hold airtightness, a frequency of a crystal resonator is monitored when the base and the metallic cap are joined by resistance welding, and it is determined whether the crystal resonator is good or not by the variation of the frequency of the crystal resonator. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は水晶振動子の封止製造方法に関するものである。   The present invention relates to a sealing manufacturing method for a crystal resonator.

水晶振動子は、共振特性に優れており時間及び周波数の基準源として広く用いられ小型化とともに振動特性の変化が少なく電気的特性の安定した製品が要求されている。水晶振動子の封止形態の一つに抵抗溶接によるものがある。抵抗溶接による封止は、抵抗溶接時に発生する金属屑が飛散し、水晶片に付着し振動特性を劣化させることから、金属容器等に改良が求められている。   Quartz resonators are excellent in resonance characteristics and are widely used as a reference source for time and frequency, and there is a demand for products that are small in size and have little change in vibration characteristics and stable electrical characteristics. One of the sealing forms of the crystal resonator is one by resistance welding. Sealing by resistance welding is required to improve metal containers and the like because metal scraps generated during resistance welding scatter and adhere to a crystal piece to deteriorate vibration characteristics.

図２、図３は封止に抵抗溶接を用いた水晶振動子の断面図である。従来の技術を図２、図３とともに説明する。従来の水晶振動子は図２に示すように一対のリード線３を、絶縁部材（不図示）を介して気密かつ絶縁したベース２と、このベース２上に突出したリード線３に溶接される支持体４と、この支持体４に搭載され導電性接着材６で接合される水晶片５と金属製キャップ１からなり、金属製キャップ１のフランジとベース２のフランジを抵抗溶接機により押圧するとともに通電させ両者を接合する。図３はベースのフランジ外周に金属製の突起２ｂを形成し、抵抗溶接を行なう水晶振動子を示す。抵抗溶接では一般的に前記のように接合部分に突起２ｂを設け、この部分に抵抗溶接時の電流および圧力を集中させることで、溶接を容易にしていた。   2 and 3 are cross-sectional views of a crystal resonator using resistance welding for sealing. The prior art will be described with reference to FIGS. As shown in FIG. 2, the conventional quartz resonator is welded to a base 2 in which a pair of lead wires 3 are airtight and insulated via an insulating member (not shown), and a lead wire 3 protruding above the base 2. It consists of a support 4, a crystal piece 5 mounted on the support 4 and joined by a conductive adhesive 6 and a metal cap 1, and the flange of the metal cap 1 and the flange of the base 2 are pressed by a resistance welder. And energize them together to join them together. FIG. 3 shows a crystal resonator in which a metal protrusion 2b is formed on the outer periphery of the flange of the base and resistance welding is performed. In resistance welding, generally, as described above, the protrusion 2b is provided at the joint portion, and the current and pressure at the time of resistance welding are concentrated on this portion to facilitate welding.

抵抗溶接による封止では、溶接時に圧力が加わることもあり金属屑７が飛散することがあった。前記のように抵抗溶接は金属製キャップ１とベース２のフランジを溶接するため、金属製キャップ１とベース２の側面が密接しないように、金属製キャップ１の内周はベース２の外周より大きく設定される。したがって金属製キャップ１とベース２の間には隙間がある状態であり、この隙間から前記の金属屑７が金属容器内に侵入して、水晶片５に付着する。   In sealing by resistance welding, pressure may be applied during welding, and the metal scrap 7 may be scattered. As described above, since the resistance welding welds the flanges of the metal cap 1 and the base 2, the inner periphery of the metal cap 1 is larger than the outer periphery of the base 2 so that the side surfaces of the metal cap 1 and the base 2 do not come into close contact with each other. Is set. Therefore, there is a gap between the metal cap 1 and the base 2, and the metal scrap 7 enters the metal container from this gap and adheres to the crystal piece 5.

前記のように、水晶片５に金属屑７が付着した水晶振動子は周波数の変化やＣＩ値の低下等、振動特性や電気特性の劣化を引き起こし、信頼性を維持できなくなることがあった。このような不具合は水晶振動子が小型化されることで顕在化し、電気的性能や信頼性の低下の要因とされていた。このような不具合を回避する手段として、ベース２のフランジ領域を除く上面に、金属製キャップの開口とほぼ同じ外形形状のフレキシブル絶縁シートを設置することでベース２と金属製キャップ１間にできる隙間の上部を塞ぐ構造が開示されている（例えば、特許文献１参照）。
特開平１１−１６８３４９号公報 As described above, the crystal resonator in which the metal scrap 7 adheres to the crystal piece 5 may cause deterioration in vibration characteristics and electrical characteristics such as a change in frequency and a decrease in CI value, and the reliability may not be maintained. Such inconveniences became apparent as the crystal unit was miniaturized, and was regarded as a cause of a decrease in electrical performance and reliability. As a means for avoiding such a problem, a gap formed between the base 2 and the metal cap 1 by installing a flexible insulating sheet having substantially the same outer shape as the opening of the metal cap on the upper surface of the base 2 excluding the flange region. The structure which closes the upper part of is disclosed (for example, refer patent document 1).
JP-A-11-168349

ＣＩ値の低下等、振動特性や電気特性の劣化を引き起こし、信頼性を維持できなくなる要因を持つ、水晶片に金属屑の付着した水晶振動子を判別できない点である。   It is a point that a crystal resonator in which metal debris adheres to a crystal piece that causes deterioration of vibration characteristics and electrical characteristics such as a decrease in CI value and cannot maintain reliability cannot be identified.

また、水晶片に金属屑を付着させないためにベースと金属製キャップ間にできる隙間の上部を塞ぐ構造では、フレキシブル絶縁シート等の隙間の上部を塞ぐ部材が必要であり、部品点数の増加、工数の増加となっていた。   In addition, a structure that closes the upper part of the gap between the base and the metal cap in order to prevent metal chips from adhering to the crystal piece requires a member that closes the upper part of the gap, such as a flexible insulating sheet, increasing the number of parts and man-hours. It was an increase.

上記課題を解決するために、本発明は外周に金属製のフランジを有し、一対のリード線を、絶縁部材を介して気密かつ絶縁したベースと、金属製キャップを抵抗溶接により接合し気密性を保持する水晶振動子の封止製造方法において、前記ベースと金属製キャップの抵抗溶接を行なう際に水晶振動子の周波数を監視し、水晶振動子の周波数の変化量により水晶振動子の良否判定をする水晶振動子の封止製造方法とする。   In order to solve the above problems, the present invention has a metal flange on the outer periphery, a pair of lead wires that are airtight and insulated via an insulating member, and a metal cap joined by resistance welding to form an airtight In the method of manufacturing a crystal resonator that holds the crystal, the frequency of the crystal resonator is monitored when resistance welding is performed between the base and the metal cap, and the quality of the crystal resonator is determined based on the amount of change in the frequency of the crystal resonator. A method for manufacturing a sealed quartz crystal resonator.

本発明の封止製造方法は、抵抗溶接時に水晶振動子の周波数を監視し、水晶振動子の周波数の変化量により金属屑が水晶片に付着した水晶振動子を検出する事が可能となる。   According to the sealing manufacturing method of the present invention, it is possible to monitor the frequency of the crystal unit during resistance welding and detect the crystal unit in which metal scraps adhere to the crystal piece based on the amount of change in the frequency of the crystal unit.

金属容器の改良や新たに部材を追加することなく、水晶片に金属屑が付着していない信頼性のある水晶振動子を提供できる。   It is possible to provide a reliable crystal resonator in which metal chips are not attached to a crystal piece without improving the metal container or adding a new member.

封止時に水晶片に金属屑等の異物付着により周波数が変化したことを検出し、後工程に不良を流出しない様にすることを、部品変更や部材追加をせずに実現した。   It was possible to detect that the frequency was changed due to adhesion of foreign matter such as metal scraps on the quartz piece at the time of sealing, and to prevent defects from flowing out into the subsequent process without changing parts or adding members.

図１は本発明の実施例を説明するための模式図である。一対のリード線３を絶縁部材を介して気密かつ絶縁したベース２のフランジと金属製キャップ１のフランジを抵抗溶接電極８により押圧するとともに通電させ両者を接合する。   FIG. 1 is a schematic diagram for explaining an embodiment of the present invention. The flange of the base 2 and the flange of the metal cap 1 in which the pair of lead wires 3 are airtight and insulated via an insulating member are pressed by the resistance welding electrode 8 and are energized to join them.

本発明の水晶振動子の封止製造方法では、抵抗溶接時に周波数カウンター９等の外部計測器により水晶振動子の周波数を監視し、金属屑７等が水晶片５に付着して周波数が変化した水晶振動子を検出する。   In the sealing manufacturing method of the crystal resonator according to the present invention, the frequency of the crystal resonator is monitored by an external measuring instrument such as the frequency counter 9 during resistance welding, and the frequency is changed due to metal scraps 7 or the like adhering to the crystal piece 5. Detect a quartz crystal.

本発明の実施例を説明するための模式図Schematic diagram for explaining an embodiment of the present invention 封止に抵抗溶接を用いた水晶振動子の断面図Cross section of quartz crystal using resistance welding for sealing 封止に抵抗溶接を用いた水晶振動子の断面図Cross section of quartz crystal using resistance welding for sealing

符号の説明Explanation of symbols

１ 金属製キャップ
２ ベース
２ａ 外周部に突起を有するベース
２ｂ 突起
３ リード線
４ 支持体
５ 水晶片
６ 導電性接着剤
７ 金属屑
８ 抵抗溶接電極
９ 周波数カウンター
DESCRIPTION OF SYMBOLS 1 Metal cap 2 Base 2a Base which has protrusion in the outer peripheral part 2b Protrusion 3 Lead wire 4 Support body 5 Crystal piece 6 Conductive adhesive 7 Metal scrap 8 Resistance welding electrode 9 Frequency counter

Claims (1)

外周に金属製のフランジを有し、一対のリード線を、絶縁部材を介して気密かつ絶縁したベースと、金属製キャップを抵抗溶接により接合し気密性を保持する水晶振動子の封止製造方法において、前記ベースと金属製キャップの抵抗溶接を行なう際に水晶振動子の周波数を監視し、水晶振動子の周波数の変化量により水晶振動子の良否判定することを特徴とした水晶振動子の封止製造方法。   A crystal resonator sealing manufacturing method having a metal flange on the outer periphery, a base in which a pair of lead wires are airtight and insulated via an insulating member, and a metal cap joined by resistance welding to maintain airtightness In this case, the frequency of the crystal unit is monitored when resistance welding of the base and the metal cap is performed, and the quality of the crystal unit is determined based on the amount of change in the frequency of the crystal unit. Stop manufacturing method.
JP2004036033A 2004-02-13 2004-02-13 Sealing and manufacturing method of crystal resonator Pending JP2005229338A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007235729A (en) * 2006-03-02 2007-09-13 Fujitsu Ltd Apparatus and method for detecting foreign substance in package
CN101814904A (en) * 2010-04-24 2010-08-25 烟台大明电子有限公司 Quartz crystal resonator and manufacture process thereof
CN103208976A (en) * 2013-05-09 2013-07-17 铜陵市晶顺电子有限责任公司 Miniaturized high-frequency quartz crystal oscillator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007235729A (en) * 2006-03-02 2007-09-13 Fujitsu Ltd Apparatus and method for detecting foreign substance in package
CN101814904A (en) * 2010-04-24 2010-08-25 烟台大明电子有限公司 Quartz crystal resonator and manufacture process thereof
CN103208976A (en) * 2013-05-09 2013-07-17 铜陵市晶顺电子有限责任公司 Miniaturized high-frequency quartz crystal oscillator

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