JPS61212109A - Piezoelectric vibrator - Google Patents

Piezoelectric vibrator

Info

Publication number
JPS61212109A
JPS61212109A JP5264785A JP5264785A JPS61212109A JP S61212109 A JPS61212109 A JP S61212109A JP 5264785 A JP5264785 A JP 5264785A JP 5264785 A JP5264785 A JP 5264785A JP S61212109 A JPS61212109 A JP S61212109A
Authority
JP
Japan
Prior art keywords
electrode
external terminal
frame
piezoelectric film
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
Application number
JP5264785A
Other languages
Japanese (ja)
Inventor
Takeshi Nakamura
武 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP5264785A priority Critical patent/JPS61212109A/en
Publication of JPS61212109A publication Critical patent/JPS61212109A/en
Pending legal-status Critical Current

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  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To prevent a connection failure between an electrode and an external terminal by forming the electrode on the surface of a part of a supporting frame connected to a vibration substrate and connecting the external terminal to this electrode. CONSTITUTION:A substrate 12 consisting of a constant elastic metallic material is formed by a square island-shaped vibrator element 14, and a supporting frame for surrounding it. This vibrator element 14 is connected to an opposed side part of the supporting frame 16 by a connecting part 18a and 18b. On the upper face or one main surface of the vibrator element 14, a piezoelectric film 20 is formed by sputtering, etc. On the surface of this piezoelectric film 20, the first electrode 22 is formed, and the electrode 22 is formed in a shape connected to a leader electrode 22a through the connecting part 18a. Also, on the upper face of a side opposed to a side of the supporting frame 16 on which the leader electrode 22a has been formed, the second electrode 24 is formed by a vapor deposition, etc. An external terminal 26b and the frame 16 are connected through the electrode 24, therefore, when forming the piezoelectric film 20 by sputtering, even if the piezoelectric film or an oxide film sticks to a part of the frame 16, it can be prevented that a connection failure is generated between the frame and the external terminal.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は圧電振動子に関し、特にたとえば広がり振動
、屈曲振動あるいは輪郭振動などの振動モードを利用す
る、圧電振動子に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a piezoelectric vibrator, and more particularly to a piezoelectric vibrator that utilizes a vibration mode such as spreading vibration, bending vibration, or contour vibration.

(従来技術) 圧電振動子の一例がたとえば実開昭59−84921号
公報などで知られている。この圧電振動子は、エリンバ
などのような恒弾性金属材料からなる基板を含み、この
基板がたとえばエツチングによって島状の振動子エレメ
ント部分およびこれを囲むフレームとして形成され、振
動子エレメント部分(振動基板)には圧電薄膜および電
極が順次積層的に形成される。そして、フレームが一方
電極として用いられ、そこに外部端子が接続されていた
(Prior Art) An example of a piezoelectric vibrator is known from, for example, Japanese Utility Model Application Publication No. 59-84921. This piezoelectric vibrator includes a substrate made of a constant elastic metal material such as Elinva, and this substrate is formed by etching, for example, as an island-shaped vibrator element part and a frame surrounding it. ), a piezoelectric thin film and an electrode are sequentially formed in a laminated manner. The frame was used as one electrode, and an external terminal was connected thereto.

(発明が解決しようとする問題点) 従来、圧電振動子は、フレームなど不要な部分をマスク
して島状の振動子エレメントに酸化亜鉛(Z n O)
などをスパッタリングして圧電膜を形成していた。しか
し、スパッタマスクの取り付けのずれや浮き、およびス
パッタリングに際しての温度変化などによってスパッタ
マスクの浮きによって、ZnOが廻り込んでフレームの
一部表面に付着する。圧電振動子が小型になるほど、マ
スキング処理が難しく、このZnOの廻り込みが多くな
る。また、スパッタリング中の酸化性雰囲気によってフ
レームの一部に酸化膜が形成されることもある。したが
って、フレームを電極として利用する場合、その部分に
圧電膜や酸化膜が形成されれば、たとえばフレームに外
部端子を溶接する際に溶接の付きが悪く、また、フレー
ムに外部端子を圧接する際には接触不良が生じ易い。こ
のように、従来の圧電振動子は接続不良を生じ易い。
(Problems to be Solved by the Invention) Conventionally, piezoelectric vibrators have been manufactured by masking unnecessary parts such as the frame and using zinc oxide (ZnO) as an island-shaped vibrator element.
A piezoelectric film was formed by sputtering. However, due to the misalignment or lifting of the sputter mask, and the lifting of the sputter mask due to temperature changes during sputtering, ZnO gets around and adheres to a part of the surface of the frame. The smaller the piezoelectric vibrator becomes, the more difficult the masking process becomes, and the more ZnO wraps around the piezoelectric vibrator. Furthermore, an oxide film may be formed on a portion of the frame due to the oxidizing atmosphere during sputtering. Therefore, when using the frame as an electrode, if a piezoelectric film or oxide film is formed on that part, it may result in poor welding when welding an external terminal to the frame, or when pressure-welding an external terminal to the frame. poor contact is likely to occur. As described above, conventional piezoelectric vibrators are prone to connection failures.

それゆえに、この発明の主たる目的は、接続不良の生じ
ない圧電振動子を提供することである。
Therefore, the main object of the present invention is to provide a piezoelectric vibrator that does not cause poor connection.

(問題点を解決するための手段) この発明は、恒弾性金属材料からなる振動基板と、基板
上に形成される圧電膜と、圧電膜上に形成される第1の
電極と、振動基板に一体的に連結される支持フレームと
、支持フレームの一部表面に形成されかつ外部端子に接
続される第2の電極とを備える、圧電振動子である。
(Means for Solving the Problems) This invention provides a vibrating substrate made of a constant elastic metal material, a piezoelectric film formed on the substrate, a first electrode formed on the piezoelectric film, and a vibrating substrate made of a constant elastic metal material. The piezoelectric vibrator includes a support frame that is integrally connected to the support frame, and a second electrode formed on a part of the surface of the support frame and connected to an external terminal.

(作用) フレームに形成された第2の電極に外部端子を接続する
(Function) An external terminal is connected to the second electrode formed on the frame.

(発明の効果) この発明によれば、支持フレームの一部表面に第2の電
極を形成しているので、この第2の電極と外部端子との
間には接続不良を生じることが少ない。
(Effects of the Invention) According to the present invention, since the second electrode is formed on a part of the surface of the support frame, poor connection between the second electrode and the external terminal is less likely to occur.

また、第2の電極を第1の電極と同じ側の面に形成すれ
ば、組み立てが容易となり、さらに、第2の電極と第1
の電極を同じ材料で形成すれば、同時にこれら電極を形
成できるなどの利点がある。
Furthermore, if the second electrode is formed on the same side as the first electrode, assembly becomes easier, and furthermore, the second electrode and the first
If the two electrodes are made of the same material, there is an advantage that these electrodes can be formed at the same time.

この発明の上述の目的、その他の目的、特徴および利点
は、図面を参照して行なう以下の実施例の詳細な説明か
ら一層明らかとなろう。
The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(実施例) 図はこの発明の一実施例の斜視図である。この圧電振動
子10は、恒弾性金属材料(機械振動が生じ易い合金)
からなる基板12を含む。このような恒弾性金属材料と
しては、たとえばエリンバ、アンバ、コニリンパ、42
アロイおよび36アロイ (インバ)などが利用可能で
ある。基板12は、たとえばプレス成型やエツチングな
どによって、四角形の島状の振動子エレメント14とこ
れを囲む支持フレーム16とに形成される。この振動基
板すなわち振動子エレメント14は連結部18aおよび
18bによって支持フレーム16の対向する辺部分と連
結される。
(Embodiment) The figure is a perspective view of an embodiment of the present invention. This piezoelectric vibrator 10 is made of a constant elastic metal material (an alloy that easily generates mechanical vibration).
It includes a substrate 12 consisting of. Examples of such constant elasticity metal materials include Erinba, Amba, Konirinpa, and 42
Alloy and 36 Alloy (Inva) are available. The substrate 12 is formed into a rectangular island-shaped vibrator element 14 and a support frame 16 surrounding the vibrator element 14 by, for example, press molding or etching. This vibrating substrate or vibrator element 14 is connected to opposing side portions of the support frame 16 by connecting portions 18a and 18b.

振動子エレメント14の上面ないし一方主面上には、圧
電膜20がスパッタリングなどによって形成される。こ
のとき、フレーム16の大部分がマスクされ、この圧電
膜20が、一方の連結部18aを通って支持フレーム1
6の1つの辺の上面まで引き出される形にスパッタリン
グなどによって形成される。圧電膜20の材料としては
、酸化亜鉛(Z n O)の他に窒化アルミニウム(/
l!N)などが利用可能である。
A piezoelectric film 20 is formed on the upper surface or one main surface of the vibrator element 14 by sputtering or the like. At this time, most of the frame 16 is masked, and the piezoelectric film 20 passes through one of the connecting parts 18a to the supporting frame 1.
It is formed by sputtering or the like so as to extend up to the upper surface of one side of 6. The piezoelectric film 20 is made of aluminum nitride (ZnO) as well as zinc oxide (ZnO).
l! N) etc. are available.

さらに、振動子エレメント14上に形成された圧電膜2
0の表面には、第1の電極22が蒸着などによって形成
される。このとき、第1の電極22は、連結部18aを
通って支持フレーム16の1つの辺部分まで引き出され
て、引出電極22aに接続された形に蒸着などによって
形成される。
Furthermore, the piezoelectric film 2 formed on the vibrator element 14
A first electrode 22 is formed on the surface of 0 by vapor deposition or the like. At this time, the first electrode 22 is drawn out to one side of the support frame 16 through the connecting portion 18a, and is formed by vapor deposition or the like in a form connected to the lead-out electrode 22a.

この第1の電極22の材料としては、たとえばニッケル
、アルミニウム、 IMおよび金などが利用可能である
As the material of this first electrode 22, for example, nickel, aluminum, IM, gold, etc. can be used.

一方、引出電極22aの形成された支持フレーム16の
辺と対向する辺の上面には、第2の電極24が蒸着など
によって形成される。この第2の電極24は、好ましく
は、第1の電極22と同じ材料が用いられる。これによ
って、第1の電極22と第2の電極24が同じ工程で同
時に形成できるので、従来に比べて製造工程が増加する
ことばない。さらに、第1の電極22すなわち引出電極
22aと第2の電極24とを同じ側の面に形成するよう
にすれば、1枚の蒸着マスクで同時にその形成領域を規
定でき、この面でも製造コストの上昇はない。
On the other hand, a second electrode 24 is formed by vapor deposition or the like on the upper surface of the side opposite to the side of the support frame 16 on which the extraction electrode 22a is formed. This second electrode 24 is preferably made of the same material as the first electrode 22. As a result, the first electrode 22 and the second electrode 24 can be formed simultaneously in the same process, so there is no need to increase the number of manufacturing steps compared to the conventional method. Furthermore, if the first electrode 22, that is, the extraction electrode 22a, and the second electrode 24 are formed on the same side, the formation area can be defined at the same time with one vapor deposition mask, which also reduces the manufacturing cost. There is no increase in

このように構成された圧電振動子10は、第1の電極2
2すなわち引出電極22aが外部端子26aに、第2の
電極24が外部端子26bに、それぞれ溶接または圧接
などによって、接続して用いられる。この場合、外部端
子26bと支持フレーム16とが第2の電極24を介し
て電気的に接続されるので、圧電膜20をスパッタリン
グによって形成する際に、圧電膜や酸化膜が支持フレー
ム16の一部に付着しても、フレームと外部端子との間
に接続不良が生じるのを防止できる。また、引出電極2
2aと外部端子26aとの接続、および電極24と外部
端子との接続をそれぞれ圧接構造にすれば接続が簡単と
なる。この場合、第1の電極22すなわち引出電極22
aと第2の電極24とを基板の同じ面に形成すれば、一
方面から圧接するだけですむので、組み立てが容易にな
る。
The piezoelectric vibrator 10 configured in this way has a first electrode 2
In other words, the extraction electrode 22a is connected to the external terminal 26a, and the second electrode 24 is connected to the external terminal 26b by welding or pressure welding. In this case, since the external terminal 26b and the support frame 16 are electrically connected via the second electrode 24, when the piezoelectric film 20 is formed by sputtering, the piezoelectric film and the oxide film are connected to one part of the support frame 16. It is possible to prevent a connection failure between the frame and the external terminal even if it adheres to the frame and the external terminal. In addition, extraction electrode 2
If the connection between the electrode 2a and the external terminal 26a and the connection between the electrode 24 and the external terminal are made into a pressure contact structure, the connection becomes simple. In this case, the first electrode 22, that is, the extraction electrode 22
If a and the second electrode 24 are formed on the same side of the substrate, it is only necessary to press them together from one side, which facilitates assembly.

また、従来では圧電膜20をスパッタリングで形成する
際に、圧電膜材料がスパッタリングマスクの浮いている
部分から廻り込んで支持フレーム16に付着するのを低
減するために、振動子エレメント14と支持フレーム1
6との間隔を大きくする必要があったが、この実施例の
ように第2の電極24を形成すれば、絶縁膜材料の廻り
込みを殆ど問題としないので、振動子エレメント14と
支持フレーム16との間隔を小さくでき、圧電振動子l
O全全体外形寸法を小さくできるという別の利点がある
Conventionally, when forming the piezoelectric film 20 by sputtering, in order to prevent the piezoelectric film material from coming around from the floating part of the sputtering mask and adhering to the support frame 16, the vibrator element 14 and the support frame 1
However, if the second electrode 24 is formed as in this embodiment, there is almost no problem with the insulating film material getting around, so the distance between the vibrator element 14 and the support frame 16 It is possible to reduce the distance between the piezoelectric vibrator l
Another advantage is that the overall overall external dimensions can be reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

図面はこの発明の一実施例を示す斜視図である。 図において、10は圧電振動子、12は基板、14は振
動子エレメント(振動基板)、16は支持フレーム、2
0および20aは圧電膜、22は第1の電極、22aは
引出電極、24は第2の電極、26aおよび26bは外
部接続端子を示す。
The drawing is a perspective view showing an embodiment of the invention. In the figure, 10 is a piezoelectric vibrator, 12 is a substrate, 14 is a vibrator element (vibration substrate), 16 is a support frame, 2
0 and 20a are piezoelectric films, 22 is a first electrode, 22a is an extraction electrode, 24 is a second electrode, and 26a and 26b are external connection terminals.

Claims (1)

【特許請求の範囲】 1 恒弾性金属材料からなる振動基板、 前記振動基板上に形成される圧電膜、 前記圧電膜上に形成されかつ外部端子に接続されるべき
第1の電極、 前記振動基板に一体的に連結されて振動基板を支持する
支持フレーム、および 前記支持フレームの一部表面に形成されかつ外部端子に
接続されるべき第2の電極を備える、圧電振動子。 2 前記第2の電極は、前記第1の電極と同じ側の面に
形成される、特許請求の範囲第1項記載の圧電振動子。 3 前記第2の電極は、前記第1の電極と同じ材料で形
成される、特許請求の範囲第2項記載の圧電振動子。 4 前記圧電膜および前記第1の電極は、前記支持フレ
ーム上の前記第2の電極の形成位置とは異なる部分まで
引き出して形成される、特許請求の範囲第1項ないし第
3項のいずれかに記載の圧電振動子。
[Scope of Claims] 1. A vibrating substrate made of a constant elastic metal material, a piezoelectric film formed on the vibrating substrate, a first electrode formed on the piezoelectric film and to be connected to an external terminal, and the vibrating substrate. A piezoelectric vibrator, comprising: a support frame that is integrally connected to the support frame to support a vibrating substrate; and a second electrode that is formed on a part of the surface of the support frame and is to be connected to an external terminal. 2. The piezoelectric vibrator according to claim 1, wherein the second electrode is formed on the same side as the first electrode. 3. The piezoelectric vibrator according to claim 2, wherein the second electrode is made of the same material as the first electrode. 4. Any one of claims 1 to 3, wherein the piezoelectric film and the first electrode are formed by being drawn out to a different position on the support frame from where the second electrode is formed. Piezoelectric vibrator described in.
JP5264785A 1985-03-15 1985-03-15 Piezoelectric vibrator Pending JPS61212109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5264785A JPS61212109A (en) 1985-03-15 1985-03-15 Piezoelectric vibrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5264785A JPS61212109A (en) 1985-03-15 1985-03-15 Piezoelectric vibrator

Publications (1)

Publication Number Publication Date
JPS61212109A true JPS61212109A (en) 1986-09-20

Family

ID=12920632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5264785A Pending JPS61212109A (en) 1985-03-15 1985-03-15 Piezoelectric vibrator

Country Status (1)

Country Link
JP (1) JPS61212109A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537033A (en) * 1978-09-07 1980-03-14 Seiko Instr & Electronics Ltd Piezo-electric vibrator
JPS59161084A (en) * 1983-03-03 1984-09-11 Murata Mfg Co Ltd Optical control piezoelectric device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537033A (en) * 1978-09-07 1980-03-14 Seiko Instr & Electronics Ltd Piezo-electric vibrator
JPS59161084A (en) * 1983-03-03 1984-09-11 Murata Mfg Co Ltd Optical control piezoelectric device

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