JPS62142408A - Piezo-electric vibration parts - Google Patents
Piezo-electric vibration partsInfo
- Publication number
- JPS62142408A JPS62142408A JP28617985A JP28617985A JPS62142408A JP S62142408 A JPS62142408 A JP S62142408A JP 28617985 A JP28617985 A JP 28617985A JP 28617985 A JP28617985 A JP 28617985A JP S62142408 A JPS62142408 A JP S62142408A
- Authority
- JP
- Japan
- Prior art keywords
- piezo
- electrodes
- electric substrate
- piezoelectric
- sheath material
- 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
【発明の詳細な説明】
（ａ）技術分野
この発明は、圧電セラミックス等からなる基板の厚み振
動を利用したエネルギー閉込型の圧電振動部品に関する
。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to an energy-trapping piezoelectric vibrating component that utilizes thickness vibration of a substrate made of piezoelectric ceramics or the like.
（ｂ）従来技術とその欠点
エネルギー閉込型の圧電振動部品は、圧電共振子や圧電
フィルタ等のそれぞれの目的に応じた圧電特性を有する
圧電基板を使用し、電極を形成した後、空洞を形成する
エネルギー閉込領域を除いたこの圧電基板全体を合成樹
脂の外装材で覆うことにより形成される。ところが、こ
の合成樹脂の外装材は、一般的にはエポキシ樹脂を使用
し、圧電基板の特性には関わりなく電子部品の種類が変
わっても同じ組成のものを使用していた。すなわち外装
材の選択の際には、圧電基板の特性とのマツチングは何
ら考慮されていなかった。したがって従来の外装材は、
圧電振動部品の振動特性の改善に何ら貢献しないばかり
でなく、圧電基板とのマツチングが悪い場合には振動特
性の悪化を助長するおそれさえあった。(b) Prior art and its drawbacks Energy-trapping piezoelectric vibrating components use piezoelectric substrates that have piezoelectric properties depending on their purpose, such as piezoelectric resonators and piezoelectric filters, and after forming electrodes, a cavity is opened. It is formed by covering the entire piezoelectric substrate except for the energy confinement region to be formed with a synthetic resin exterior material. However, this synthetic resin exterior material generally uses epoxy resin, and has the same composition regardless of the characteristics of the piezoelectric substrate and even if the type of electronic component changes. That is, when selecting the exterior material, no consideration was given to matching the characteristics of the piezoelectric substrate. Therefore, conventional exterior materials
Not only does it not contribute in any way to improving the vibration characteristics of the piezoelectric vibrating component, but if the matching with the piezoelectric substrate is poor, there is a fear that the vibration characteristics may worsen.
（Ｃ）発明の目的
この発明は、このような事情に鑑みなされたものであっ
て、圧電基板の特性と相補的な特性を外装材に持たせる
ことにより、振動特性の向」二を図ることができる圧電
振動部品を提供することを目的とする。(C) Purpose of the Invention This invention was made in view of the above circumstances, and aims to improve the vibration characteristics by providing the exterior material with characteristics complementary to those of the piezoelectric substrate. The purpose is to provide piezoelectric vibrating components that can.
（ｄ１発明の構成および効果
この発明の圧電振動部品は、空洞を形成する工ネルギー
閉じ込め領域を除いた圧電基板全体を合成樹脂の外装材
で覆うことにより形成される圧電振動部品において、圧
電基板に対して外装材の特性が相補的となるように、合
成樹脂の組成を選択して使用したことを特徴とする。(d1 Structure and Effect of the Invention The piezoelectric vibrating component of the present invention is a piezoelectric vibrating component formed by covering the entire piezoelectric substrate except for an energy confinement area forming a cavity with a synthetic resin exterior material. The composition of the synthetic resin is selected and used so that the characteristics of the exterior material are complementary.
この発明を上記のように構成すると、圧電基板が振動特
性の劣化に繋がる特性変化を生ずるのを外装材の特性に
よって補うことができる。したがって、従来圧電基板の
振動特性とは関わりがなくまたはかえって悪化させるお
それのあった外装材が、この発明では振動特性の向］二
に貢献することができる。このため、この発明は圧電振
動部品の品質の向上を図ることができる。When the present invention is configured as described above, the characteristics of the exterior material can compensate for changes in the characteristics of the piezoelectric substrate that lead to deterioration of vibration characteristics. Therefore, the exterior material, which conventionally has no relation to the vibration characteristics of the piezoelectric substrate or may even worsen them, can contribute to improving the vibration characteristics in the present invention. Therefore, the present invention can improve the quality of piezoelectric vibrating components.
ｔｅ＋実施例
第１図はこの発明の実施例で用いる圧電振動部品の縦断
面図である。この実施例は、圧電基板１と外装材２とで
構成される。圧電ノ、（板ｌは、圧電セラミックスの薄
い板であり、両面中央部に電極３．３が向かい合わせに
形成され、エネルギー閉込型の厚み振動を行う。また、
これらの電極３゜３は、引出電極を介してそれぞれり−
Ｆ４．４に接続されている。外装材２は、エポキシ樹脂
をモールドした保護部材であり、リード４，４のみを突
出させて圧電基板１全体を覆っている。ただし、圧電基
板１両面の電極３．３周辺はエネルギー閉込型の厚み振
動のための領域となるので、外装材２を排除して空洞５
．５を形成している。この外装材２は、エポキシ樹脂の
組成を選択して粘度やチクソトロピー等を調節すること
により、圧電基板１の温度特性に対し゛（相補的となる
厚めに形成される。te+ Embodiment FIG. 1 is a longitudinal sectional view of a piezoelectric vibrating component used in an embodiment of the present invention. This embodiment is composed of a piezoelectric substrate 1 and an exterior material 2. Piezoelectric (plate 1 is a thin plate of piezoelectric ceramics, electrodes 3.3 are formed facing each other in the center of both sides, and performs energy-confined thickness vibration.
These electrodes 3゜3 are connected to each other via extraction electrodes.
Connected to F4.4. The exterior material 2 is a protective member molded with epoxy resin, and covers the entire piezoelectric substrate 1 with only the leads 4, 4 protruding. However, since the area around the electrodes 3 and 3 on both sides of the piezoelectric substrate 1 is an area for energy-confined thickness vibration, the exterior material 2 is removed and the cavity 5 is
．． 5 is formed. This exterior material 2 is formed to be thick enough to be complementary to the temperature characteristics of the piezoelectric substrate 1 by selecting the composition of the epoxy resin and adjusting the viscosity, thixotropy, etc.
この実施例を」−〕記のように構成すると、圧電基ティ
ブ化させることができ、結局、圧電振動部品全体の温度
特性が改善される。したがって、この実施例は外装材２
の厚みをコントロールすることにより、圧電振動部品の
特性の向上を図ることができる。When this embodiment is configured as described in ``-'', it can be made into a piezoelectric substrate, and as a result, the temperature characteristics of the piezoelectric vibrating component as a whole are improved. Therefore, in this embodiment, the exterior material 2
By controlling the thickness of the piezoelectric vibrating component, it is possible to improve the characteristics of the piezoelectric vibrating component.
第１図はこの発明の実施例で用いる圧電振動部品の縦断
面図である。
１−圧電基板、２−外装材。FIG. 1 is a longitudinal sectional view of a piezoelectric vibrating component used in an embodiment of the present invention. 1-piezoelectric substrate, 2-exterior material.
Claims (1)
基板全体を合成樹脂の外装材で覆うことにより形成され
る圧電振動部品において、 圧電基板に対して外装材の特性が相補的となるように、
合成樹脂の組成を選択して使用したことを特徴とする圧
電振動部品。(1) In piezoelectric vibrating parts that are formed by covering the entire piezoelectric substrate except for the energy confinement region forming a cavity with a synthetic resin exterior material, the characteristics of the exterior material are complementary to those of the piezoelectric substrate. To,
A piezoelectric vibrating component characterized by using a selected composition of synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28617985A JPS62142408A (en) | 1985-12-17 | 1985-12-17 | Piezo-electric vibration parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28617985A JPS62142408A (en) | 1985-12-17 | 1985-12-17 | Piezo-electric vibration parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62142408A true JPS62142408A (en) | 1987-06-25 |
Family
ID=17700968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28617985A Pending JPS62142408A (en) | 1985-12-17 | 1985-12-17 | Piezo-electric vibration parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62142408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4017023A1 (en) * | 1989-05-27 | 1990-11-29 | Murata Manufacturing Co | PIEZOELECTRIC DEVICE WITH VIBRATION DIRECTION IN THICKNESS EXTENSION AND METHOD FOR THEIR PRODUCTION |
| JPH04280506A (en) * | 1991-03-08 | 1992-10-06 | Murata Mfg Co Ltd | Manufacture of resin package piezoelectric component |
| US6957475B2 (en) | 1998-10-20 | 2005-10-25 | Murata Manufacturing Co., Ltd. | Method of manufacturing piezoelectric component |
-
1985
- 1985-12-17 JP JP28617985A patent/JPS62142408A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4017023A1 (en) * | 1989-05-27 | 1990-11-29 | Murata Manufacturing Co | PIEZOELECTRIC DEVICE WITH VIBRATION DIRECTION IN THICKNESS EXTENSION AND METHOD FOR THEIR PRODUCTION |
| DE4017023C2 (en) * | 1989-05-27 | 1999-04-08 | Murata Manufacturing Co | Piezoelectric device with direction of oscillation in thickness and method for its production |
| JPH04280506A (en) * | 1991-03-08 | 1992-10-06 | Murata Mfg Co Ltd | Manufacture of resin package piezoelectric component |
| US6957475B2 (en) | 1998-10-20 | 2005-10-25 | Murata Manufacturing Co., Ltd. | Method of manufacturing piezoelectric component |
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