JP2000031773A - Crystal vibrator of surface mount type - Google Patents
Crystal vibrator of surface mount typeInfo
- Publication number
- JP2000031773A JP2000031773A JP10213530A JP21353098A JP2000031773A JP 2000031773 A JP2000031773 A JP 2000031773A JP 10213530 A JP10213530 A JP 10213530A JP 21353098 A JP21353098 A JP 21353098A JP 2000031773 A JP2000031773 A JP 2000031773A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- crystal
- plate surface
- center
- mount type
- 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、形状が小型で良好
な振動特性を得ることができる表面実装型の水晶振動子
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-mount type crystal unit having a small shape and capable of obtaining good vibration characteristics.
【０００２】[0002]
【従来の技術】近時、種々の電子機器では周波数、時間
の基準として水晶振動子が多用されている。一方、電子
機器の小型、軽量化および組立工程の自動化が望まれ、
表面実装型の部品が多用される傾向にある。このため水
晶振動子も表面実装型のものが望まれている。2. Description of the Related Art In recent years, various kinds of electronic devices often use a quartz oscillator as a reference for frequency and time. On the other hand, miniaturization and weight reduction of electronic equipment and automation of the assembly process are desired,
Surface mount components tend to be used extensively. For this reason, a crystal resonator of a surface mount type is also desired.
【０００３】このような表面実装型の水晶振動子では、
たとえば図２に示す斜視図のようにセラミックのベース
１の内側板面に保持電極２を形成し、ここに短冊型の水
晶片３の一端部を載置し、導電性接着剤を用いて固着す
るとともに水晶片３の板面の中央部に形成した励振電極
４との電気的な導通を図るようにしている。In such a surface-mount type crystal unit,
For example, as shown in the perspective view of FIG. 2, a holding electrode 2 is formed on an inner plate surface of a ceramic base 1, one end of a strip-shaped quartz piece 3 is placed thereon, and fixed using a conductive adhesive. At the same time, electrical conduction with the excitation electrode 4 formed at the center of the plate surface of the crystal blank 3 is achieved.
【０００４】なおベース１の周縁には環状のシールリン
グ５を固着し、このシールリング５の上面を図示しない
蓋体で気密に封止する。またベース１の外側板面には、
上記保持電極２に導通して実装電極を形成し、この実装
電極をプリント基板へ半田付けして実装するようにして
いる。An annular seal ring 5 is fixed to the periphery of the base 1, and the upper surface of the seal ring 5 is hermetically sealed with a lid (not shown). Also, on the outer plate surface of the base 1,
The mounting electrode is formed by being electrically connected to the holding electrode 2, and the mounting electrode is soldered and mounted on a printed circuit board.
【０００５】しかして、このような構造の場合、保持電
極と水晶片の電極の導出端との間の導電性接着剤が水晶
片の板面中央方向へ広がると振動特性を著しく損なうこ
とになる。したがって水晶片を保持電極に載置、固定す
る作業には細心の注意を必要とし、工数の増加及び歩留
まりの低下によりコストの増大する問題があった。However, in the case of such a structure, if the conductive adhesive between the holding electrode and the lead-out end of the electrode of the crystal blank spreads toward the center of the plate surface of the crystal blank, the vibration characteristics are significantly impaired. . Therefore, the work of mounting and fixing the crystal blank on the holding electrode requires careful attention, and there has been a problem that the cost increases due to an increase in the number of steps and a decrease in the yield.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記の事情に
鑑みてなされたもので、水晶片を保持する工程における
導電性接着剤の水晶片の板面中央方向への流れ出しを防
止し、良好な振動特性を得ることができ、しかも組立工
程の歩留まりを向上しコストの低減を図ることができる
表面実装型の水晶振動子を提供することを目的とするも
のである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and prevents the conductive adhesive from flowing toward the center of the plate surface of the crystal piece in the step of holding the crystal piece. It is an object of the present invention to provide a surface-mount type crystal unit which can obtain excellent vibration characteristics and can improve the yield of the assembling process and reduce the cost.
【０００７】[0007]
【課題を解決するための手段】本発明は、セラミック製
のベースの外側板面に設けた実装電極に導通して内側板
面に設けた保持電極に板面中央部に励振電極を形成した
水晶片を導電性接着剤を用いて保持するとともに上記励
振電極を上記実装電極へ導出するものにおいて、上記保
持電極は上記水晶片の板面中央方向の縁部に水晶片の板
面中央方向への導電性接着剤の広がりを阻止する凸堤を
形成したことを特徴とするものである。SUMMARY OF THE INVENTION The present invention is directed to a quartz crystal in which a mounting electrode provided on an outer plate surface of a ceramic base is electrically connected to a holding electrode provided on an inner plate surface and an excitation electrode is formed in the center of the plate surface. While holding the piece using a conductive adhesive and leading the excitation electrode to the mounting electrode, the holding electrode is located at the edge of the crystal piece in the direction of the plate surface center in the direction of the plate surface center of the crystal piece. The present invention is characterized in that a ridge for preventing spread of the conductive adhesive is formed.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図１に示す要部の
組立斜視図を参照して詳細に説明する。図中１１は板状
のセラミックからなる概略矩形のベースで、このベース
１１の上側板面の周縁部には金属製のシールリング１２
を設けている。そしてベース１１とシールリング１２に
よって概略図２に示すような箱形の容器を形成するよう
にしている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to an assembled perspective view of main parts shown in FIG. In the figure, reference numeral 11 denotes a substantially rectangular base made of a plate-like ceramic, and a metal seal ring 12
Is provided. The base 11 and the seal ring 12 form a box-shaped container as shown in FIG.
【０００９】そしてベース１１の外側底面には図示しな
い実装電極を形成し、この実装電極を印刷配線基板の導
電パターンに半田付けして実装するようにしている。ベ
ース１１の内側板面には上記実装電極に導通して保持電
極１３を形成している。この実装電極および保持電極１
３は、たとえばメタライズ処理によって形成した金属厚
膜上にニッケル、金等をメッキ処理したものである。A mounting electrode (not shown) is formed on the outer bottom surface of the base 11, and the mounting electrode is soldered to a conductive pattern of a printed wiring board for mounting. The holding electrode 13 is formed on the inner plate surface of the base 11 so as to be electrically connected to the mounting electrode. This mounting electrode and holding electrode 1
Numeral 3 is obtained by plating nickel, gold or the like on a thick metal film formed by, for example, a metallizing process.
【００１０】そして上記保持電極１３に導電性接着剤を
塗布して水晶片１４を載置、固定する。この水晶片１４
は、たとえば厚み滑り振動を励振するＡＴカットの水晶
片である。このような水晶片１４は、人工水晶の結晶を
結晶軸に対して所定角度に切断して板状に成形し、所望
の共振周波数に応じた厚みに研磨する。そして外形をた
とえば短冊型に成形し、表裏板面に相対面して励振電極
１５を形成したものである。[0010] Then, a conductive adhesive is applied to the holding electrode 13, and the crystal blank 14 is placed and fixed. This crystal piece 14
Is, for example, an AT-cut crystal blank that excites thickness-shear vibration. Such a crystal blank 14 is formed by cutting an artificial quartz crystal at a predetermined angle with respect to the crystal axis, forming a plate shape, and polishing the crystal to a thickness corresponding to a desired resonance frequency. The external shape is formed into, for example, a strip shape, and the excitation electrode 15 is formed facing the front and back plate surfaces.
【００１１】そして水晶片１４の片端を保持するもので
は、上記励振電極１５をそれぞれ水晶片１４の長手方向
の一端部へ延出している。そして、上記保持電極１３
は、たとえば略正方形であってベース１１内側の長手方
向に沿った中心線の両側で、かつ長手方向の端部に所定
の間隔を存して設けている。そして保持電極１３のベー
ス１１の中央側の内側の角部１３ａを円弧状に成形して
いる。In the case where one end of the crystal blank 14 is held, the excitation electrodes 15 extend to one end of the crystal blank 14 in the longitudinal direction. Then, the holding electrode 13
Are, for example, substantially square and are provided on both sides of a center line along the longitudinal direction inside the base 11 and at predetermined intervals at longitudinal ends. The inner corner 13a of the holding electrode 13 on the center side of the base 11 is formed in an arc shape.
【００１２】そして、この保持電極１３の上面には、ベ
ース１１の中央側の内側の角部１３ａおよびこの角部１
３ａをはさむ辺に沿って厚み２０ミクロン〜１００ミク
ロン程度の金属厚膜からなる凸堤１６を形成している。
この凸堤１６は、たとえば保持電極１３の上にメタライ
ズ処理を行って形成すればよい。On the upper surface of the holding electrode 13, an inner corner 13a on the center side of the base 11 and the corner 1a
A convex bank 16 made of a metal thick film having a thickness of about 20 to 100 microns is formed along the side sandwiching 3a.
The convex ridge 16 may be formed by, for example, performing a metallizing process on the holding electrode 13.
【００１３】なお保持電極１３の上面には、上記凸堤１
６から離れた位置に、たとえば上記円弧状の角部１３ａ
に向かって棒状に凸堤１６と同じ高さの凸部１７を設け
るようにしてもよい。この凸部１７も上記凸堤１６と同
様にメタライズ処理によって形成すればよい。The upper surface of the holding electrode 13 is provided with
6, for example, at the above-mentioned arc-shaped corner portion 13a
A convex portion 17 having the same height as the convex bank 16 may be provided in a bar shape toward. This convex portion 17 may be formed by metallization similarly to the above-mentioned convex bank 16.
【００１４】そして保持電極１３に導電性接着剤を塗布
して、ここに水晶片１４の励振電極１５の導出端を載
置、固着し、水晶片を保持するとともに励振電極１５と
保持電極１３とを電機的に導通させるようにしている。
そしてシールリングの上面を図示しない蓋体で気密に封
止するようにしている。Then, a conductive adhesive is applied to the holding electrode 13, and the lead-out end of the excitation electrode 15 of the crystal blank 14 is placed and fixed thereon, and the crystal blank is held. Are electrically conducted.
The upper surface of the seal ring is hermetically sealed with a lid (not shown).
【００１５】このようにすれば、保持電極１３に導電性
接着剤を塗布してここに水晶片１４の励振電極１５の導
出端を載置、固着する際に、凸堤１６によって導電性接
着剤の水晶片１４の板面の中央方向への広がりを阻止す
ることができる。したがって、水晶片１４を保持電極１
３へ載置、固着する作業を容易に行え、しかも良好な振
動特性を得ることができる。In this way, when the conductive adhesive is applied to the holding electrode 13 and the lead-out end of the excitation electrode 15 of the crystal blank 14 is placed and fixed thereon, the conductive adhesive is Of the crystal blank 14 in the center direction can be prevented. Therefore, the crystal blank 14 is connected to the holding electrode 1.
The work of mounting and fixing to 3 can be easily performed, and good vibration characteristics can be obtained.
【００１６】このため水晶片を保持電極に固着する工程
における歩留まりを高くでき、しかも特性のばらつきも
極めて少なくなる。また凸部１７を設けると、水晶片１
４の端部を保持電極１３に載置した際に水晶片１４を容
易にベース１１の板面に平行に保持することができる。Therefore, the yield in the step of fixing the crystal blank to the holding electrode can be increased, and the variation in characteristics can be extremely reduced. In addition, when the convex portion 17 is provided, the crystal blank 1
The crystal blank 14 can be easily held parallel to the plate surface of the base 11 when the end of the base 4 is placed on the holding electrode 13.
【００１７】さらに保持電極１３の上面は複雑な凹凸が
形成されるために導電性接着剤の接着力を高めることが
できる利点がある。なお図１に示すようにベース１１の
板面中央方向の保持電極１３の縁部を円弧状に形成すれ
ば、水晶片１４の板面中央方向への導電性接着剤の広が
りをさらに確実に防止することができる。Furthermore, since the upper surface of the holding electrode 13 is formed with complicated irregularities, there is an advantage that the adhesive force of the conductive adhesive can be increased. If the edge of the holding electrode 13 in the center direction of the plate surface of the base 11 is formed into an arc shape as shown in FIG. can do.
【００１８】なお上記実施例によれば水晶片１４の端部
はベース１１の上側板面よりも保持電極１３の凸堤の厚
みだけ高い位置に保持されることになる。したがって水
晶片１４の板面を凸レンズ状に成形する、たとえばベベ
ル加工を行った場合にも水晶片１４の板面中央部がベー
ス１１に接触することを防止できる効果がある。According to the above-described embodiment, the end of the crystal blank 14 is held at a position higher than the upper plate surface of the base 11 by the thickness of the ridge of the holding electrode 13. Therefore, even when the plate surface of the crystal blank 14 is formed into a convex lens shape, for example, when beveling is performed, there is an effect that the center of the plate surface of the crystal blank 14 can be prevented from contacting the base 11.
【００１９】[0019]
【発明の効果】以上詳述したように、本発明によれば、
水晶片の保持及び励振電極の導出のために用いる導電性
接着剤の水晶片の板面中央方向への流れ出しを防止で
き、それによって均一かつ良好な振動特性を得ることが
でき、しかも組立工程の歩留まりを向上し、製品の価格
を低減することができる表面実装型の水晶振動子を提供
することができる。As described in detail above, according to the present invention,
The conductive adhesive used for holding the crystal blank and leading the excitation electrode can be prevented from flowing out toward the center of the plate surface of the crystal blank, whereby uniform and good vibration characteristics can be obtained. It is possible to provide a surface-mount type crystal unit that can improve the yield and reduce the price of a product.
【図１】本発明の一実施例の要部の組立斜視図であるFIG. 1 is an assembled perspective view of a main part of an embodiment of the present invention.
【図２】従来の表面実装型の水晶振動子の内部を示す斜
視図である。FIG. 2 is a perspective view showing the inside of a conventional surface mount type crystal unit.
１１ ・・ ベース １３ ・・ 保持電極 １４ ・・ 水晶片 １６ ・・ 凸堤 １７ ・・ 凸部 11 base 13 holding electrode 14 crystal blank 16 ridge 17 ridge
Claims (6)
実装電極に導通して内側板面に設けた保持電極に板面中
央部に励振電極を形成した水晶片を導電性接着剤を用い
て保持するとともに上記励振電極を上記実装電極へ導出
するものにおいて、 上記保持電極はベースの板面中央方向の縁部に導電性接
着剤の水晶片の板面中央方向への広がりを阻止する凸堤
を形成したことを特徴とする表面実装型の水晶振動子。1. A quartz chip having an excitation electrode formed at the center of the plate surface on a holding electrode provided on the inner plate surface and electrically connected to a mounting electrode provided on an outer plate surface of a ceramic base, using a conductive adhesive. Wherein the excitation electrode is led out to the mounting electrode, wherein the holding electrode has a projection on an edge of the base in the center of the plate surface to prevent the conductive adhesive from spreading in the center of the crystal blank in the plate surface. A surface-mount type crystal unit characterized by forming a bank.
板面中央方向の保持電極の縁部は円弧状であることを特
徴とする表面実装型の水晶振動子。2. The surface-mounted crystal resonator according to claim 1, wherein the edge of the holding electrode in the center direction of the plate surface of the base has an arc shape.
短冊型であることを特徴とする表面実装型の水晶振動
子。3. A surface-mounted crystal resonator according to claim 1, wherein the crystal piece is a strip.
は水晶片をベース板面に平行に保持するために凸堤から
離れた位置に同じ高さの凸部を形成したことを特徴とす
る表面実装型の水晶振動子。4. A holding electrode according to claim 1, wherein the holding electrode is formed with a convex portion having the same height at a position away from the convex bank to hold the crystal blank parallel to the base plate surface. Surface mount type crystal unit.
短冊型の長手方向の一端部を保持することを特徴とする
表面実装型の水晶振動子。5. A surface-mount type crystal resonator according to claim 1, wherein the crystal piece holds one end in a longitudinal direction of a strip shape.
短冊型の長手方向の両端部を保持することを特徴とする
表面実装型の水晶振動子。6. A surface-mount type crystal unit according to claim 1, wherein the crystal piece holds both ends of the strip in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10213530A JP2000031773A (en) | 1998-07-13 | 1998-07-13 | Crystal vibrator of surface mount type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10213530A JP2000031773A (en) | 1998-07-13 | 1998-07-13 | Crystal vibrator of surface mount type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000031773A true JP2000031773A (en) | 2000-01-28 |
Family
ID=16640725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10213530A Pending JP2000031773A (en) | 1998-07-13 | 1998-07-13 | Crystal vibrator of surface mount type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000031773A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009294404A (en) * | 2008-06-04 | 2009-12-17 | Citizen Finetech Miyota Co Ltd | Compact liquid crystal display device |
| JP2010086649A (en) * | 2008-09-08 | 2010-04-15 | Nhk Spring Co Ltd | Electrical connecting structure for piezoelectric element, piezoelectric actuator, head suspension, and electrical connecting structure for conductive member |
| WO2011155600A1 (en) * | 2010-06-11 | 2011-12-15 | 株式会社大真空 | Oscillator |
| JP2012119848A (en) * | 2010-11-30 | 2012-06-21 | Kyocera Kinseki Corp | Piezoelectric device |
| JP2014030085A (en) * | 2012-07-31 | 2014-02-13 | Kyocera Corp | Resonator |
| JP2016219094A (en) * | 2016-08-26 | 2016-12-22 | 大日本印刷株式会社 | Suspension substrate, suspension, suspension with head, and hard disk drive |
| US10326455B2 (en) | 2015-11-02 | 2019-06-18 | Seiko Epson Corporation | Integrated circuit device, electronic device, electronic apparatus, and base station |
-
1998
- 1998-07-13 JP JP10213530A patent/JP2000031773A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009294404A (en) * | 2008-06-04 | 2009-12-17 | Citizen Finetech Miyota Co Ltd | Compact liquid crystal display device |
| JP2010086649A (en) * | 2008-09-08 | 2010-04-15 | Nhk Spring Co Ltd | Electrical connecting structure for piezoelectric element, piezoelectric actuator, head suspension, and electrical connecting structure for conductive member |
| WO2011155600A1 (en) * | 2010-06-11 | 2011-12-15 | 株式会社大真空 | Oscillator |
| CN102893516A (en) * | 2010-06-11 | 2013-01-23 | 株式会社大真空 | Oscillator |
| US8884712B2 (en) | 2010-06-11 | 2014-11-11 | Daishinku Corporation | Oscillator |
| JP2015149788A (en) * | 2010-06-11 | 2015-08-20 | 株式会社大真空 | oscillator |
| CN102893516B (en) * | 2010-06-11 | 2015-10-21 | 株式会社大真空 | Oscillator |
| JP5861460B2 (en) * | 2010-06-11 | 2016-02-16 | 株式会社大真空 | Oscillator |
| JP2012119848A (en) * | 2010-11-30 | 2012-06-21 | Kyocera Kinseki Corp | Piezoelectric device |
| JP2014030085A (en) * | 2012-07-31 | 2014-02-13 | Kyocera Corp | Resonator |
| US10326455B2 (en) | 2015-11-02 | 2019-06-18 | Seiko Epson Corporation | Integrated circuit device, electronic device, electronic apparatus, and base station |
| JP2016219094A (en) * | 2016-08-26 | 2016-12-22 | 大日本印刷株式会社 | Suspension substrate, suspension, suspension with head, and hard disk drive |
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