JPS63296508A - Piezoelectric component - Google Patents
Piezoelectric componentInfo
- Publication number
- JPS63296508A JPS63296508A JP13273787A JP13273787A JPS63296508A JP S63296508 A JPS63296508 A JP S63296508A JP 13273787 A JP13273787 A JP 13273787A JP 13273787 A JP13273787 A JP 13273787A JP S63296508 A JPS63296508 A JP S63296508A
- Authority
- JP
- Japan
- Prior art keywords
- lead terminal
- electrode
- curved part
- curved
- piezoelectric
- 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
- 239000000758 substrate Substances 0.000 claims description 20
- 238000000605 extraction Methods 0.000 claims description 12
- 229910000679 solder Inorganic materials 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は圧電共振子や圧電フィルタ等の圧電部品に関し
、より詳しくは、圧電部品のリード端子の取付構造に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to piezoelectric components such as piezoelectric resonators and piezoelectric filters, and more particularly to a mounting structure for lead terminals of piezoelectric components.
（従来技術）
近年、電子機器の小形化に伴い、電子部品もますます小
形のものが要求される傾向にある。(Prior Art) In recent years, with the miniaturization of electronic devices, there is a tendency for electronic components to be increasingly smaller.
このため、テレビジョン受像機の音声信号トラップ等の
圧電部品においても、たとえば第３図に示すように、幅
の狭い長方形状の圧電基板ｌ上にこの圧電基ｉ＆ｔのエ
ネルギー閉込め型厚みすべり振動モードを利用した２端
子形共振子２，３を形成したエレメント４を使用して低
背化を図ったものが市販されている。上記圧電基板１の
一つの主表面には、第３図（ａ）に示すように、２端子
形共振子の一方の電極５および２端子形共振子３の一方
の電極７が形成されるとともに、両端部に夫々端部引出
し電極９および１１が形成される。そして、２端子形共
振子２の上記電極５は接続電極Ｉ２により端部引出し電
極９に接続され、また、２端子形共振子３の上記電極７
は接続型［！１４によりいま一つの端部引出し電極ＩＮ
こ接続される。一方、上記圧電基板ｌのいま一つの主表
面には、第３図（ｂ）に示すように、２端子形共振子２
および３の他方の電極１５および１６が形成されるとと
もに、これら電極１５と１６との間に中間引出し電極１
７が形成され、この中間引出し電極Ｉ７は接続電極１８
および１９により夫々上記電極１５および１６に接続さ
れる。For this reason, even in piezoelectric components such as audio signal traps of television receivers, as shown in FIG. A low profile device using an element 4 formed with two-terminal resonators 2 and 3 utilizing a mode is commercially available. As shown in FIG. 3(a), one electrode 5 of the two-terminal resonator and one electrode 7 of the two-terminal resonator 3 are formed on one main surface of the piezoelectric substrate 1. , end extraction electrodes 9 and 11 are formed at both ends, respectively. The electrode 5 of the two-terminal resonator 2 is connected to the end extraction electrode 9 by the connecting electrode I2, and the electrode 7 of the two-terminal resonator 3 is
is a connection type [! 14, another end extraction electrode IN
This is connected. On the other hand, as shown in FIG. 3(b), there is a two-terminal resonator 2 on the other main surface of the piezoelectric substrate l.
The other electrodes 15 and 16 of 3 and 3 are formed, and the intermediate extraction electrode 1
7 is formed, and this intermediate extraction electrode I7 is connected to the connection electrode 18.
and 19 are connected to the electrodes 15 and 16, respectively.
従来、上記のような幅の狭いエレメント４を使用して低
背化を図った圧電部品では、第４図に示すように、端部
引出し電極９，１１および中間引出し電極１７（第３図
（ａ）および（ｂ）参照）に直接、一定幅を有するリー
ド片状のリード端子２Ｉ、２２および２３を半田付けし
、圧電基板ｌの２端子形共振子２および３の形成部分が
振動できるように、エレメント４をシリコンゴム等のゴ
ム状弾性体（図示せず。）で被覆し、その上から、第５
図に示すように、外装樹脂２４で被覆していた。Conventionally, in a piezoelectric component whose height has been reduced by using the narrow element 4 as described above, as shown in FIG. (a) and (b)) are directly soldered with lead terminals 2I, 22 and 23 in the form of lead pieces having a constant width, so that the portions forming the two-terminal resonators 2 and 3 of the piezoelectric substrate l can vibrate. Next, the element 4 is covered with a rubber-like elastic body (not shown) such as silicone rubber, and a fifth
As shown in the figure, it was covered with an exterior resin 24.
ところで、上記圧電部品は、取り扱う周波数が高くなる
ほど圧電基板ＩＬ厚みが薄くなる。たとえば、テレビジ
ョン受像機の音声信号トラップでは、上記圧電基板ｌの
厚みは数分のｌａ＋程度と非常に薄くなる。このように
厚みの非常に薄い圧電基板ｌに、上記のように、リード
端子２１．２２および２３を直接、半田付けし、ゴム状
弾性体および外装樹脂２４で外装するので、圧電フィル
タの製造途中に圧電基板ｌにストレスが加わると、圧電
基板ｌに割れやクラックが発生するという問題があった
。By the way, in the above piezoelectric component, the higher the frequency handled, the thinner the piezoelectric substrate IL becomes. For example, in the audio signal trap of a television receiver, the thickness of the piezoelectric substrate l is extremely thin, approximately several minutes la+. As described above, the lead terminals 21, 22 and 23 are directly soldered to the very thin piezoelectric substrate l, and the piezoelectric filter is covered with a rubber-like elastic body and the outer resin 24. There is a problem in that when stress is applied to the piezoelectric substrate l, cracks or cracks occur in the piezoelectric substrate l.
また、上記圧電フィルタを低背化とともに小形化しよう
とすると、フィルタ周波数に対して圧電基板１の面積が
ほぼ決まるため、端部引出し電極９および１１を小さく
しなければならず、リード端子２１および２２の半田付
は時に端部引出し電極９および１１が圧電基板Ｉから剥
離する等のトラブルが発生し、信頼性が低下するという
問題かあった。Furthermore, when attempting to reduce the height and size of the piezoelectric filter, the area of the piezoelectric substrate 1 is approximately determined by the filter frequency, so the end extraction electrodes 9 and 11 must be made smaller, and the lead terminals 21 and 22 sometimes causes troubles such as peeling of the end lead-out electrodes 9 and 11 from the piezoelectric substrate I, resulting in lower reliability.
（発明の目的）
本発明の目的は、信頼性が高く小形化および低背化が容
易な圧電部品を提供することである。(Object of the Invention) An object of the present invention is to provide a piezoelectric component that has high reliability and can be easily reduced in size and height.
（発明の構成）
このため、本発明は、ほぼ一定幅を有する圧電基板の一
つの主表面の端部に圧電基板の幅方向に走る端部引き出
し電極が形成されてなるエレメントを有し、このエレメ
ントの上記圧電基板のいま一つの主表面側から上記端部
引き出し電極上にほぼ一定の幅を有する板状のリード端
子がＵ字状に湾曲されて上記端部引き出し電極に導電的
に接着されるとともに、この湾曲部分の内側にて上記エ
レメントの端部に両側からリード端子の上記湾曲部分を
間にして対向する部分が圧接していることを特徴として
いる。上記エレメントはその端部がリード端子の湾曲部
にて保持され、リード端子とエレメントの端部引き出し
電極との半田等による導電的な接着力に加えて、リード
端子の湾曲部が有しているばね力により、エレメントに
対するリード端子の固定強度が高まる。(Structure of the Invention) Therefore, the present invention has an element in which an end lead-out electrode running in the width direction of the piezoelectric substrate is formed at the end of one main surface of a piezoelectric substrate having a substantially constant width; A plate-shaped lead terminal having a substantially constant width is curved into a U-shape from the other main surface side of the piezoelectric substrate of the element onto the end lead-out electrode, and is electrically conductively bonded to the end lead-out electrode. In addition, portions of the lead terminals facing each other with the curved portion in between are in pressure contact with the ends of the element from both sides inside the curved portion. The above element is held at its end by the curved part of the lead terminal, and in addition to the conductive adhesive force between the lead terminal and the end-extracted electrode of the element by soldering, etc., the curved part of the lead terminal has The spring force increases the strength of fixing the lead terminal to the element.
（発明の効果）
本発明によれば、リード端子とエレメントの端部引き出
し電極との半田等による導電的な接着力に加えて、リー
ド端子の湾曲部が有しているばね力がエレメントに作用
してこのエレメントを保持しているので、エレメントに
対するリード端子の固定強度が高まり、リード端子とエ
レメントの端部引き出し電極との電気的な接続か確実に
なるとともに、端部引き出し電極の剥離等のトラブルも
なくすことができる。(Effects of the Invention) According to the present invention, in addition to the conductive adhesive force generated by soldering or the like between the lead terminal and the end-extracted electrode of the element, the spring force of the curved portion of the lead terminal acts on the element. Since this element is held in place, the strength of fixing the lead terminal to the element is increased, ensuring electrical connection between the lead terminal and the end electrode of the element, and preventing peeling of the end electrode. Trouble can be eliminated.
（実施例） 以下、添付の図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
本発明を第３図において説明した電極構成を有するエレ
メント４を使用した圧電部品に適用した実施例の内部構
造の斜視図および部分断面図を夫々第１図および第２図
に示す。A perspective view and a partial cross-sectional view of an internal structure of an embodiment in which the present invention is applied to a piezoelectric component using an element 4 having the electrode configuration described in FIG. 3 are shown in FIGS. 1 and 2, respectively.
上記圧電部品は、第４図にて説明した圧電部品において
、リード端子２１が圧電基板ｌの中間引出し電極１７の
形成側の主表面から電極（端部引き出し電極）９側にＵ
字状に湾曲しており、この湾曲部分２１ａの内側にて、
上記エレメント４の端部に両側からリード端子２１の上
記湾曲部分２１ａを間にして対向する部分２１ｂ、２１
ｃが圧接するようにしたものである。また、いま一つの
リード端子２２についても、上記リード端子２１と全く
同様に、Ｕ字状に湾曲され、上記エレメント４のいま一
つの端部に両側からリード端子２２の湾曲部分２２ａを
間にして対向する部分２２ｂ、２２ｃが圧接するように
したものである。In the piezoelectric component described in FIG. 4, the lead terminal 21 extends from the main surface of the piezoelectric substrate 1 on the side where the intermediate extraction electrode 17 is formed to the electrode (end extraction electrode) 9 side.
It is curved in a character shape, and inside this curved part 21a,
Portions 21b, 21 facing the end of the element 4 from both sides with the curved portion 21a of the lead terminal 21 in between.
c is in pressure contact. Further, the other lead terminal 22 is also curved in a U-shape in exactly the same way as the lead terminal 21, and is attached to the other end of the element 4 from both sides with the curved portion 22a of the lead terminal 22 in between. The opposing portions 22b and 22c are brought into pressure contact.
なお、第り図および第２図において、第４図に対応する
部分には対応する符号を付して示し、重複した説明は省
略する。In addition, in FIG. 1 and FIG. 2, parts corresponding to those in FIG. 4 are indicated with corresponding reference numerals, and redundant explanation will be omitted.
リード端子２１の上記湾曲部２１ａおよびいま一つのリ
ード端子２２の上記湾曲部２２ａの内部には、半田等の
導電性接着材２４が供給される。A conductive adhesive 24 such as solder is supplied inside the curved portion 21 a of the lead terminal 21 and the curved portion 22 a of the other lead terminal 22 .
このような構成であれば、エレメント４は導電性接着材
２４による接着力に加えて、リード端子２１．２２の湾
曲部２１ａ、２２ａが有しているばね力によりエレメン
ト４の両端部が夫々上記湾［１２１ａ、２２ａ内に保持
される。これにより、エレメント４に対するリード端子
２１．２２の固定強度が高くなり、製造工程等において
、リード端子２１．２２にストレスか加えられても、端
部引出し電極９．１１等が剥離することはなくなる。With such a configuration, in addition to the adhesive force of the conductive adhesive 24, the spring force of the curved portions 21a and 22a of the lead terminals 21 and 22 causes both ends of the element 4 to It is held within the bay [121a, 22a. This increases the fixing strength of the lead terminals 21.22 to the element 4, and even if stress is applied to the lead terminals 21.22 during the manufacturing process, the end extraction electrodes 9.11, etc. will not peel off. .
上記では、圧電基板ｌ上にエネルギー閉じ込め型厚みす
べり振動モードを利用した２端子型共振子２．３を形成
したエレメント４に本発明を適用した実施例について説
明したが、本発明は、圧電基板ｌ上にエネルギー閉じ込
め型厚みすべり振動モードを利用した３端子型共振子を
形成したエレメント等にも適用することができる。In the above, an embodiment has been described in which the present invention is applied to an element 4 in which a two-terminal resonator 2.3 using an energy-trapped thickness shear vibration mode is formed on a piezoelectric substrate l. The present invention can also be applied to an element in which a three-terminal resonator using an energy-trapped thickness-shear vibration mode is formed on the L.
第１図は本発明に係る圧電部品の一実施例の内部構造を
示す斜視図、
第２図は第１図の圧電部品のリード端子の湾曲部分の縦
断面図、
第３図（ａ）および（ｂ）はエレメントの平面図および
底面図、
第４図は従来の圧電部品の内部構造を示す斜視図、
第５図は第４図の圧電部品の外観の斜視図である。
１・・・圧電基板、 ４・・・エレメント、９．１
１・・・端部引出し電極、
１７・・・中間引出し電極、
２１・＝−リード端子（２１ａ−湾曲部、２１ｂ、２１
ｃ・・・湾曲部の両側の部分）、
２２ ・・・リード端子（２２ａ−湾曲部、２２ｂ、２
２ｃ・・・湾曲部の両側の部分）。
特 許 出 願 人 株式会社村田製作所代 理 人
弁理士 青 山 葆ほか２名第２図FIG. 1 is a perspective view showing the internal structure of an embodiment of the piezoelectric component according to the present invention, FIG. 2 is a vertical cross-sectional view of the curved portion of the lead terminal of the piezoelectric component in FIG. 1, and FIG. (b) is a plan view and a bottom view of the element, FIG. 4 is a perspective view showing the internal structure of a conventional piezoelectric component, and FIG. 5 is a perspective view of the external appearance of the piezoelectric component shown in FIG. 4. 1... Piezoelectric substrate, 4... Element, 9.1
DESCRIPTION OF SYMBOLS 1... End extraction electrode, 17... Intermediate extraction electrode, 21.=-Lead terminal (21a-curved part, 21b, 21
c...portions on both sides of the curved part), 22...lead terminals (22a-curved part, 22b, 2
2c...portions on both sides of the curved part). Patent applicant Murata Manufacturing Co., Ltd. Agent
Patent attorney Aoyama Aoyama and 2 others Figure 2
Claims (1)
基板の一つの主表面の端部に上記圧電基板の幅方向に走
る端部引き出し電極が形成されてなるエレメントを有し
、このエレメントの上記端部引き出し電極に合致してほ
ぼ一定の幅を有する板状のリード端子が導電的に接着さ
れてなる圧電部品において、 上記リード端子は圧電基板のいま一つの主表面側から上
記端部引き出し電極側にＵ字状に湾曲しておりこの湾曲
部分の内側にて上記エレメントの端部に両側からリード
端子の上記湾曲部分を間にして対向する部分が圧接して
いることを特徴とする圧電部品。(1) It is composed of a piezoelectric substrate having a substantially constant width, and has an element in which an end extraction electrode running in the width direction of the piezoelectric substrate is formed at the end of one main surface of the piezoelectric substrate, and In a piezoelectric component in which a plate-shaped lead terminal having a substantially constant width is electrically bonded to match the end-extracting electrode, the lead terminal is connected to the end-extracting electrode from the other main surface side of the piezoelectric substrate. A piezoelectric device characterized in that it is curved in a U-shape on the electrode side, and on the inside of this curved part, opposing parts of the lead terminal are in pressure contact with the ends of the element from both sides with the curved part in between. parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13273787A JPS63296508A (en) | 1987-05-28 | 1987-05-28 | Piezoelectric component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13273787A JPS63296508A (en) | 1987-05-28 | 1987-05-28 | Piezoelectric component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63296508A true JPS63296508A (en) | 1988-12-02 |
Family
ID=15088417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13273787A Pending JPS63296508A (en) | 1987-05-28 | 1987-05-28 | Piezoelectric component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63296508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0334321U (en) * | 1989-08-14 | 1991-04-04 | ||
| JPH0390521U (en) * | 1989-12-30 | 1991-09-13 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6267913A (en) * | 1985-09-19 | 1987-03-27 | Murata Mfg Co Ltd | Electronic component |
-
1987
- 1987-05-28 JP JP13273787A patent/JPS63296508A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6267913A (en) * | 1985-09-19 | 1987-03-27 | Murata Mfg Co Ltd | Electronic component |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0334321U (en) * | 1989-08-14 | 1991-04-04 | ||
| JPH0390521U (en) * | 1989-12-30 | 1991-09-13 |
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