JPH09284082A - Support structure for piezoelectric vibrator - Google Patents
Support structure for piezoelectric vibratorInfo
- Publication number
- JPH09284082A JPH09284082A JP8113097A JP11309796A JPH09284082A JP H09284082 A JPH09284082 A JP H09284082A JP 8113097 A JP8113097 A JP 8113097A JP 11309796 A JP11309796 A JP 11309796A JP H09284082 A JPH09284082 A JP H09284082A
- Authority
- JP
- Japan
- Prior art keywords
- support
- piezoelectric
- piezoelectric vibrator
- support structure
- piezoelectric plate
- 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、水晶等を用いた圧
電振動子の支持構造に関する物である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric vibrator support structure using quartz or the like.
【０００２】[0002]
【従来の技術】従来の構造をセラミックケースを用いた
表面実装型の圧電振動子を例にして説明する。従来、図
４に示すように、セラミック基板１の上部にサポート
２，３が対向して搭載されており、このサポート２，３
はＣｕ−Ｎｉ−Ｚｎ系合金等の金属板からなり、基板結
合部２１，３１と素子搭載部２２，３２と連結部２３，
３３とを有する構造となっている。そして、前記サポー
ト２，３の基板結合部２１，３１は基板１に形成された
導電パッド１ａ，１ｂに導電性接合材により必要な接続
がなされており、表裏面に励振電極が形成された矩形状
の水晶板４をサポート２，３の素子搭載部２２，３２に
搭載し、導電性接合材により電気的機械的な接続が施さ
れ、キャップ５をかぶせて気密封止していた。2. Description of the Related Art A conventional structure will be described by taking a surface mount type piezoelectric vibrator using a ceramic case as an example. Conventionally, as shown in FIG. 4, supports 2 and 3 are mounted on the top of a ceramic substrate 1 so as to face each other.
Is made of a metal plate such as Cu—Ni—Zn alloy, and is composed of the substrate coupling portions 21 and 31, the element mounting portions 22 and 32, and the coupling portion 23
33 and 33. Then, the substrate coupling portions 21 and 31 of the supports 2 and 3 are connected to the conductive pads 1a and 1b formed on the substrate 1 by a conductive bonding material as necessary, and rectangular electrodes having excitation electrodes formed on the front and back surfaces. The shaped crystal plate 4 was mounted on the element mounting portions 22 and 32 of the supports 2 and 3, and electro-mechanical connection was performed by a conductive bonding material, and the cap 5 was covered to hermetically seal.
【０００３】[0003]
【発明が解決しようとする課題】しかし、サポートは耐
衝撃性を考慮して緩衝性に優れた材質や構造を有してお
り、水晶板（特に重量のある低周波帯の水晶板）を搭載
した場合、図５（ａ）、（ｂ）、（ｃ）に示すように外
部衝撃が加わると狭いケースのキャップ、ベース間の隙
間で水晶板が上下に自由可動（撓み）し、キャップ、ベ
ースの壁面や、サポートの基部に水晶板が接触して、一
時的な振動停止を招くことがあった。この瞬間の振動停
止が、例えば車載用の圧電振動子においては重大な事故
原因となることも考えられる。これらを防止するため、
キャップ、ベースといったパッケージの空間の余裕を鑑
みて、パッケージを若干大きく設ける手段もあるが、こ
の方法では圧電振動子の小型化の障壁となるものであ
り、近年の電子部品の小型化、薄型化等の流れにそぐわ
ないものであった。However, the support has a material and a structure excellent in cushioning in consideration of impact resistance, and is equipped with a crystal plate (especially a heavy crystal plate in a low frequency band). In this case, as shown in FIGS. 5 (a), (b), and (c), when an external impact is applied, the crystal plate freely moves (flexes) up and down in the gap between the cap and the base of the narrow case, and the cap and the base. The crystal plate may come into contact with the wall surface of the base or the base of the support, causing a temporary vibration stop. It is possible that the vibration stop at this moment may cause a serious accident in, for example, a vehicle-mounted piezoelectric vibrator. To prevent these,
Considering the space of the package such as the cap and the base, there is also a means of providing the package with a slightly larger size, but this method is a barrier to the miniaturization of the piezoelectric vibrator, and the recent miniaturization and thinning of electronic components. It did not match the flow of the above.
【０００４】本発明は、圧電振動子の小型化を妨げず、
かつ、圧電振動子の振動停止等の重大な事故を防止でき
る信頼性の高い圧電振動子の支持構造を提供することを
目的とする。The present invention does not prevent miniaturization of the piezoelectric vibrator,
Moreover, it is an object of the present invention to provide a highly reliable support structure for a piezoelectric vibrator that can prevent a serious accident such as vibration stop of the piezoelectric vibrator.
【０００５】[0005]
【課題を解決するための手段】そこで、本発明は、ベー
スの外部回路と導通する導通手段の上にサポートを設
け、かつ、このサポートに圧電板を搭載して、キャップ
により気密封止した圧電振動子の支持構造において、前
記サポートは、基板結合部と圧電板搭載部とこれらを連
結する連結部とを有し、さらに、前記サポートには、圧
電板の位置決めを行う位置決め部と、サポートの撓みを
規制する撓み規制部とを設けた。Therefore, according to the present invention, a support is provided on a conducting means for conducting to an external circuit of a base, and a piezoelectric plate is mounted on the support, and the piezoelectric is hermetically sealed by a cap. In the support structure of the vibrator, the support has a substrate coupling portion, a piezoelectric plate mounting portion, and a connecting portion that connects these, and the support further includes a positioning portion for positioning the piezoelectric plate and a support portion. A flexure restricting portion for restricting flexure is provided.
【０００６】また、前記圧電板の厚み寸法に対し位置決
め部の高さ寸法を大きく設定した。Further, the height dimension of the positioning portion is set larger than the thickness dimension of the piezoelectric plate.
【０００７】また、前記圧電板の幅寸法に対し圧電板搭
載部の幅寸法を大きく設定した。Further, the width of the piezoelectric plate mounting portion is set larger than the width of the piezoelectric plate.
【０００８】[0008]
【発明の実施形態】そして、上記実施形態として、セラ
ミック基板の引出電極の上にサポートを取り付け、この
サポートに圧電板を搭載して導電性接合材により電気的
機械的に接合し、キャップにより気密封止した圧電振動
子の支持構造において、前記サポートは、基板結合部と
圧電板搭載部とこれらを連結する連結部とを有し、さら
に、前記サポートには、圧電板の位置決めを行う位置決
め片と、サポートの撓みを規制する撓み規制片とを設け
た。In the above embodiment, a support is mounted on the extraction electrode of a ceramic substrate, a piezoelectric plate is mounted on the support, and the conductive bonding material is used for electromechanical bonding. In the tightly sealed piezoelectric vibrator support structure, the support includes a substrate coupling portion, a piezoelectric plate mounting portion, and a coupling portion that couples these, and the support further includes a positioning piece for positioning the piezoelectric plate. And a bending restriction piece for restricting the bending of the support.
【０００９】[0009]
【実施例】次に、本発明の圧電振動子の支持構造とし
て、セラミックケースを用いた表面実装型の水晶振動子
を例にして説明する。図１は本発明の実施例を示す分解
斜視図である。図２は本発明の一部破断斜視図である。
尚、従来と同様の部分については同番号を付した。EXAMPLES Next, a surface mount type crystal resonator using a ceramic case will be described as an example of a support structure for a piezoelectric vibrator of the present invention. FIG. 1 is an exploded perspective view showing an embodiment of the present invention. FIG. 2 is a partially cutaway perspective view of the present invention.
Note that the same parts as those in the related art are denoted by the same reference numerals.
【００１０】セラミック基板１はアルミナからなり、薄
板状に加工され、かつその側面に４つの切り欠きが設け
られている。このセラミック基板１上には、前記４つの
切り欠きから導電パッド１ａ，１ｂにかけて、図示しな
い引出電極がメタライズ処理されている。そして、サポ
ート２Ａ，３ＡはＣｕ−Ｎｉ−Ｚｎ系合金、ＳＵＳ、洋
白、コバール、リン青銅、４２アロイ等の金属板からな
り、基板結合部２１Ａ，３１Ａと素子搭載部２２Ａ，３
２Ａと連結部２３Ａ，３３Ａとを有する構造となってお
り、前記素子搭載部２２Ａ，３２Ａには、後述する水晶
板を搭載する際の位置決めとズレ防止を行う位置決め部
２２１Ａ，３２１Ａと、撓み規制部２２２Ａ，３２２Ａ
とが形成されている。この撓み規制部が、外部衝撃等に
対するサポートの下方向の緩衝作用（撓み）に対して前
記サポートの素子搭載部の前記基板内壁への直接接触を
防止する。これらのサポート２，３はプレス加工等によ
り容易に作成できる。そして、このサポートの２Ａ，３
Ａの基板結合部２１Ａ，３１Ａを、レーザー溶接、スポ
ット溶接、ろう接、接着剤等により、導電パッド１ａ，
１ｂに電気的機械的な接合を施し、サポート２Ａ，３Ａ
はセラミック基板１並びに１１上に対向して設けられ
る。そして表裏面に励振電極が形成された（図示せず）
矩形状の水晶板４をサポート２Ａ，３Ａの素子搭載部２
２Ａ，３２Ａに搭載し、図示しない導電性接合材により
電気的機械的な接続を施した後、キャップ５をかぶせて
気密封止していた。以上のようにして、表面実装型の水
晶振動子が完成する。The ceramic substrate 1 is made of alumina, is processed into a thin plate, and has four notches on its side surface. On the ceramic substrate 1, lead electrodes (not shown) are metallized from the four cutouts to the conductive pads 1a and 1b. The supports 2A and 3A are made of a metal plate such as Cu-Ni-Zn alloy, SUS, nickel silver, kovar, phosphor bronze, 42 alloy, and the like, and the substrate coupling portions 21A and 31A and the element mounting portions 22A and 3A.
2A and connecting portions 23A and 33A are provided, and the element mounting portions 22A and 32A have positioning portions 221A and 321A that perform positioning and displacement prevention when mounting a crystal plate, which will be described later, and deflection regulation. Parts 222A, 322A
Are formed. The bending restriction portion prevents direct contact of the element mounting portion of the support with the inner wall of the substrate against a downward buffering effect (bending) of the support against external impact or the like. These supports 2 and 3 can be easily created by pressing or the like. And this support 2A, 3
The board connecting portions 21A and 31A of A are connected to the conductive pads 1a, by laser welding, spot welding, brazing, adhesive, etc.
1b is electromechanically joined to support 2A, 3A
Are provided on the ceramic substrates 1 and 11 so as to face each other. Then, excitation electrodes were formed on the front and back surfaces (not shown).
Supports rectangular crystal plate 4 Element mounting part 2 of 2A, 3A
After being mounted on 2A and 32A and electrically and mechanically connected by a conductive bonding material (not shown), the cap 5 was put on and hermetically sealed. The surface mount type crystal unit is completed as described above.
【００１１】尚、前記実施例において、前記水晶板の厚
み寸法Ｔに対して位置決め部の高さ寸法Ｈを大きく設定
したり、前記水晶板の幅寸法Ｗ1に対して圧電板搭載部
の幅寸法Ｗ2を大きく設定するとより好ましい。つま
り、前者（寸法Ｔ＜寸法Ｈ）により外部衝撃等に対する
サポートの上方向の緩衝作用（撓み）が生じても、前記
サポートの素子搭載部上の水晶板が封止したキャップの
内壁に直接接触しないように防止し、撓み規制部として
の働きもする。また、後者（寸法Ｗ1＜寸法Ｗ2）により
外部衝撃等に対するサポートの横方向の緩衝作用（撓
み）が生じても、前記サポートの素子搭載部上の水晶板
が封止したキャップの内部側壁に直接接触しないように
防止し、撓み規制部としての働きする。また、前記実施
例で示された撓み規制部に限らず、図３の（ａ）〜
（ｆ）のようなサポート形態であってもよい（図中の２
２１は位置決め部、２２２は撓み規制部を示す）。In the above embodiment, the height dimension H of the positioning portion is set to be larger than the thickness dimension T of the crystal plate, or the width of the piezoelectric plate mounting portion is set to the width dimension W 1 of the crystal plate. It is more preferable to set the dimension W 2 large. That is, even if the former (dimension T <dimension H) causes an upward buffering effect (deflection) of the support against external impact, etc., the crystal plate on the element mounting portion of the support directly contacts the inner wall of the cap. It also functions as a bending control portion. Further, even if the support (dimension W 1 <dimension W 2 ) causes a lateral buffering effect (deflection) of the support against external impact or the like, the inner side wall of the cap sealed by the crystal plate on the element mounting portion of the support It prevents it from coming into direct contact with and acts as a bending restriction part. Further, not only the bending restriction portion shown in the above-described embodiment, but also FIG.
It may be a support form such as (f) (2 in the figure).
Reference numeral 21 is a positioning portion, and 222 is a bending restriction portion).
【００１２】また、本発明の実施例では、圧電振動子の
支持構造として表面実装型の水晶振動子についてのみ説
明したが、圧電振動子としては水晶に限らず、タンタル
酸リチウム等の他の単結晶、セラミックであっても特に
問題はない。さらに圧電振動子に限らず、フィルタ、発
振器中の圧電振動子等であってもよい。Further, in the embodiments of the present invention, only the surface mount type crystal resonator has been described as the supporting structure of the piezoelectric vibrator, but the piezoelectric vibrator is not limited to the crystal and other single crystal such as lithium tantalate is used. There is no particular problem even with crystals or ceramics. Further, it is not limited to the piezoelectric vibrator, and may be a filter, a piezoelectric vibrator in an oscillator, or the like.
【００１３】[0013]
【発明の効果】特許請求項１により、水晶板等の圧電板
をサポートに搭載する際の位置決めを容易にすると共に
圧電板のズレを防止する。そして、外部衝撃等に対する
サポートの緩衝作用（撓み）により圧電板が前記基板内
壁およびサポート基板結合部に直接接触するのを防止す
る。このため、圧電振動子の小型化を妨ぐことがないの
で生産性を向上させることができ、また、圧電板の搭載
精度を向上させることができ、かつ、圧電振動子の振動
停止等の重大な事故を防止できるので信頼性の高い圧電
振動子の支持構造を提供することができる。According to the first aspect of the present invention, when the piezoelectric plate such as a crystal plate is mounted on the support, the positioning is facilitated and the displacement of the piezoelectric plate is prevented. Then, it is possible to prevent the piezoelectric plate from directly contacting the inner wall of the substrate and the support substrate joint portion by the buffering action (flexure) of the support against external impact or the like. For this reason, it is possible to improve productivity because it does not hinder the miniaturization of the piezoelectric vibrator, it is possible to improve the mounting accuracy of the piezoelectric plate, and it is important to stop the vibration of the piezoelectric vibrator. Since it is possible to prevent such accidents, it is possible to provide a highly reliable support structure for the piezoelectric vibrator.
【００１４】特許請求項２により、外部衝撃等に対する
撓み規制部として、より信頼性が向上した圧電振動子の
支持構造を提供できる。According to the second aspect, it is possible to provide a support structure for the piezoelectric vibrator, which is more reliable as a bending restricting portion against an external impact or the like.
【００１５】特許請求項３により、外部衝撃等に対する
撓み規制部として、より信頼性が向上した圧電振動子の
支持構造を提供できる。According to the third aspect, it is possible to provide a support structure for the piezoelectric vibrator with improved reliability, as the bending restricting portion against an external impact or the like.
【図１】本発明の実施例を示す分解斜視図である。FIG. 1 is an exploded perspective view showing an embodiment of the present invention.
【図２】本発明の一部破断斜視図である。FIG. 2 is a partially cutaway perspective view of the present invention.
【図３】本発明の他の実施例を示すサポート斜視図であ
る。FIG. 3 is a support perspective view showing another embodiment of the present invention.
【図４】従来の実施例を示す断面図である。FIG. 4 is a sectional view showing a conventional example.
【図５】従来の問題点を示す簡略断面図である。FIG. 5 is a simplified cross-sectional view showing a conventional problem.
１・・・セラミック基板 １ａ，１ｂ・・・導電パッド ２，３・・・サポート ２Ａ，３Ａ・・・サポート ４・・・水晶板 ５・・・キャップ 1 ... Ceramic substrate 1a, 1b ... Conductive pad 2, 3 ... Support 2A, 3A ... Support 4 ... Crystal plate 5 ... Cap
Claims (3)
たベースと、前記導通手段の上に搭載するサポートと、
このサポートに搭載する圧電板と、これらを封止するキ
ャップとを具備した圧電振動子であって、前記サポート
は、基板結合部と圧電板搭載部とこれらを連結する連結
部とを有し、さらに、前記サポートには、圧電板の位置
決めを行う位置決め部と、サポートの撓みを規制する撓
み規制部とを設けたことを特徴とする圧電振動子の支持
構造。1. A base provided with conducting means for conducting with an external circuit, and a support mounted on the conducting means.
A piezoelectric vibrator comprising a piezoelectric plate mounted on the support and a cap for sealing the piezoelectric plate, wherein the support has a substrate coupling portion, a piezoelectric plate mounting portion, and a coupling portion coupling these. Further, the support structure for a piezoelectric vibrator is characterized in that the support is provided with a positioning part for positioning the piezoelectric plate and a flexure restricting part for restricting flexure of the support.
の高さ寸法を大きく設定したことを特徴とする特許請求
項１記載の圧電振動子の支持構造。2. The support structure for a piezoelectric vibrator according to claim 1, wherein the height dimension of the positioning portion is set larger than the thickness dimension of the piezoelectric plate.
の幅寸法を大きく設定したことを特徴とする特許請求項
１記載、又は特許請求項２記載の圧電振動子の支持構
造。3. The support structure for a piezoelectric vibrator according to claim 1, wherein the width dimension of the piezoelectric plate mounting portion is set larger than the width dimension of the piezoelectric plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8113097A JPH09284082A (en) | 1996-04-09 | 1996-04-09 | Support structure for piezoelectric vibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8113097A JPH09284082A (en) | 1996-04-09 | 1996-04-09 | Support structure for piezoelectric vibrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09284082A true JPH09284082A (en) | 1997-10-31 |
Family
ID=14603412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8113097A Pending JPH09284082A (en) | 1996-04-09 | 1996-04-09 | Support structure for piezoelectric vibrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09284082A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008099570A1 (en) * | 2007-02-13 | 2008-08-21 | Daishinku Corporation | Piezoelectric vibration device |
-
1996
- 1996-04-09 JP JP8113097A patent/JPH09284082A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008099570A1 (en) * | 2007-02-13 | 2008-08-21 | Daishinku Corporation | Piezoelectric vibration device |
| JPWO2008099570A1 (en) * | 2007-02-13 | 2010-05-27 | 株式会社大真空 | Piezoelectric vibration device |
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