JPH0584685B2 - - Google Patents
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- Publication number
- JPH0584685B2 JPH0584685B2 JP59127095A JP12709584A JPH0584685B2 JP H0584685 B2 JPH0584685 B2 JP H0584685B2 JP 59127095 A JP59127095 A JP 59127095A JP 12709584 A JP12709584 A JP 12709584A JP H0584685 B2 JPH0584685 B2 JP H0584685B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric vibrator
- electrode
- piezoelectric
- piezoelectric ceramic
- electrode pattern
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/13—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials
- H03H9/132—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials characterized by a particular shape
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、例えば455kHzのAMバンドの圧電フ
イルタとして使用するのに好適な圧電振動子及び
この圧電振動子を得るのに好適な圧電振動子要素
集合体に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a piezoelectric vibrator suitable for use as a piezoelectric filter in the AM band of 455 kHz, and a piezoelectric vibrator suitable for obtaining this piezoelectric vibrator. Regarding element collections.
〈従来の技術〉
この種の圧電振動子としては、例えば第１図及
び第２図に示すように、平行四辺形の平板状に形
成された圧電磁器素体１の一面上に、その外周縁
に沿つて外側電極２を矩形リング状に設けると共
に、この外側電極２の内側にギヤツプg1を隔て
て、内側電極３を矩形状に設け、更に圧電磁器素
体１の他面の略全面に内側電極３及び外側電極２
に共通に対向する対向電極４を設けた角板型のも
のが知られている。<Prior Art> As shown in FIGS. 1 and 2, for example, as shown in FIGS. An outer electrode 2 is provided in a rectangular ring shape along the outer electrode 2, and an inner electrode 3 is provided in a rectangular shape on the inside of this outer electrode 2 with a gap g1 in between. Inner electrode 3 and outer electrode 2
A rectangular plate type is known in which a common electrode 4 is provided.
角板型の圧電振動子は、一枚の圧電磁器素体上
に複数個の圧電振動子要素を形成した圧電振動子
要素集合体を、直線的に切断することによつて製
造できるので、切打抜き加工等を経なければなら
ない円板状圧電振動子と比較して、製造が容易で
あり、圧電磁器素体の無駄が少なくて済む。 A square plate type piezoelectric vibrator can be manufactured by linearly cutting a piezoelectric vibrator element assembly in which a plurality of piezoelectric vibrator elements are formed on a single piezoelectric ceramic body. Compared to a disc-shaped piezoelectric vibrator that requires punching or the like, it is easier to manufacture, and there is less waste of the piezoelectric ceramic body.
しかし、第１図及び第２図に示した角型圧電振
動子の場合、基本共振周波数に対する高次高調波
のスプリアスが非常に大きく、圧電フイルタとし
て使用することが困難である。高調波スプリアス
抑圧を目的とした従来技術としては、例えば特公
昭46−18457号、特開昭55−143815、或いは特開
昭55−143816号等を挙げることができる。これら
の従来技術の内、特公昭46−18457号は外側電極
と内側電極との外辺比を特定の値に設定すること
により、また特開昭55−143815号及び特開昭55−
143816号は圧電磁器素体の長辺と短辺の辺比及び
二辺のなす頂角の角度を特定の値に設定して、高
調波スプリアスを低減させるものである。 However, in the case of the rectangular piezoelectric vibrator shown in FIGS. 1 and 2, spurious high-order harmonics relative to the fundamental resonance frequency are extremely large, making it difficult to use as a piezoelectric filter. Examples of conventional techniques aimed at suppressing harmonic spurious waves include Japanese Patent Publication No. 46-18457, Japanese Patent Application Laid-open No. 143815-1982, and Japanese Patent Application Laid-open No. 143816-1982. Among these conventional techniques, Japanese Patent Publication No. 46-18457 sets the outer edge ratio of the outer electrode and the inner electrode to a specific value, and
No. 143816 reduces harmonic spurious by setting the ratio of the long side to the short side of the piezoelectric ceramic body and the apex angle formed by the two sides to specific values.
〈発明が解決しようとする課題〉
しかしながら、特公昭46−18457号は或る特定
の高調波スプリアス、例えば基本共振周波数
455kHzとした場合、その３次高調波付近の1.2M
Hzにおけるスプリアスを抑圧できるだけで、他の
高調波のスプリアスを抑圧することはできない。<Problems to be Solved by the Invention> However, Japanese Patent Publication No. 18457/1984 deals with a certain harmonic spurious, for example, the fundamental resonant frequency.
When set to 455kHz, 1.2M near the third harmonic
It can only suppress spurious at Hz, but not spurious at other harmonics.
また、特開昭55−143815号及び特開昭55−
143816号は特公昭46−18457号の上記欠点を解決
することを狙つたものであるが、圧電磁器素体を
製造するに当つて、長辺及び短辺の辺比を特定の
寸法比に設定し、更に頂角の角度を特定の値に設
定する必要があるため、圧電磁器素体の製造が面
倒であること、辺比及び角度を要求値に正確にセ
ツトすることが容易ではなく、所期のスプリアス
抑圧効果を得ることが困難であること、圧電磁器
素体の材料無駄を生じ易いこと等の難点がある。 Also, JP-A-55-143815 and JP-A-55-
No. 143816 aims to solve the above-mentioned shortcomings of Japanese Patent Publication No. 46-18457, but when manufacturing a piezoelectric ceramic body, the side ratio of the long side and short side is set to a specific dimensional ratio. However, since it is necessary to set the apex angle to a specific value, manufacturing the piezoelectric ceramic body is troublesome, and it is not easy to accurately set the side ratio and angle to the required values, and However, there are disadvantages such as difficulty in obtaining the desired spurious suppression effect and the tendency to waste material in the piezoelectric ceramic body.
更に、上述した各従来例においては、内側電極
３と外側電極２とが互いの独立しているため、分
極する場合、第３図に示すように、内側電極３と
外側電極２との間のギヤツプg1を埋める仮電極５
を塗布して分極せざるを得なかつた。６は直流電
源である。このため、分極処理作業が面倒で、量
産性が上がらず、コスト高になる。 Furthermore, in each of the above-mentioned conventional examples, since the inner electrode 3 and the outer electrode 2 are independent of each other, when polarization occurs, the gap between the inner electrode 3 and the outer electrode 2 as shown in FIG. Temporary electrode 5 filling gap g1
I had no choice but to polarize it by applying it. 6 is a DC power supply. For this reason, the polarization process is troublesome, mass productivity is not improved, and costs are high.
本発明の課題は、上述する従来の問題点を解決
し、高調波スプリアス抑圧作用が大きく、分極処
理が非常に容易で、量産性に優れた圧電振動子及
びこの圧電振動子を得るのに好適な圧電振動子要
素集合体を提供することである。 An object of the present invention is to solve the above-mentioned conventional problems, and to provide a piezoelectric vibrator that has a large harmonic spurious suppression effect, is extremely easy to polarize, and is suitable for mass production, and is suitable for obtaining this piezoelectric vibrator. An object of the present invention is to provide a piezoelectric vibrator element assembly.
〈課題を解決するための手段〉
上述した課題解決のため、本発明は、平行四辺
形の外形を有して平板状に形成された圧電磁器素
体の一面上に、その外周縁に沿つて外側電極を設
けると共に、この外側電極の内側にギヤツプを隔
てて内側電極を設け、前記圧電磁器素体の他面側
に前記内側電極及び外側電極に共通に対向する対
向電極を設けた圧電振動子において、前記圧電磁
器素体の少なくとも一つの隅部に前記外側電極の
存在しない領域を設け、該領域を通つて前記内側
電極を前記圧電磁器素体の外周端縁に導出したこ
とを特徴とする。<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides a piezoelectric ceramic body having a parallelogram outer shape and formed into a flat plate, on one surface thereof, along its outer periphery. A piezoelectric vibrator comprising an outer electrode, an inner electrode separated by a gap on the inside of the outer electrode, and a counter electrode that commonly faces the inner electrode and the outer electrode on the other surface of the piezoelectric ceramic body. A region where the outer electrode does not exist is provided in at least one corner of the piezoelectric ceramic body, and the inner electrode is led out to the outer peripheral edge of the piezoelectric ceramic body through the region. .
また、上記圧電振動子を得るための本発明に係
る圧電振動子要素集合体は、一枚の圧電磁器素体
上に複数個の未分極の圧電振動子要素を形成した
圧電振動子要素集合体において、前記圧電振動子
要素の各々は、前記圧電磁器素体の一面上に形成
された内側電極パターン、この内側電極パターン
をギヤツプを介して包囲するように形成された外
側電極パターン及び前記圧電磁器素体の他面側に
おいて前記内側電極パターン及び外側電極パター
ンに共通に対向する対向電極パターンを備え、各
圧電振動子要素の前記外側電極パターンは互いに
連続するパターンとし、前記内側電極パターンは
各圧電振動子要素における前記外側電極パターン
の少なくとも一つの隅部に形成された電極非形成
領域を通して外側電極パターンにそれぞれ連続さ
せたことを特徴とする。 Further, the piezoelectric vibrator element assembly according to the present invention for obtaining the piezoelectric vibrator is a piezoelectric vibrator element assembly in which a plurality of unpolarized piezoelectric vibrator elements are formed on a single piezoelectric ceramic body. Each of the piezoelectric vibrator elements includes an inner electrode pattern formed on one surface of the piezoelectric ceramic element, an outer electrode pattern formed to surround the inner electrode pattern via a gap, and the piezoelectric ceramic. A counter electrode pattern that commonly faces the inner electrode pattern and the outer electrode pattern is provided on the other side of the element body, the outer electrode patterns of each piezoelectric vibrator element are continuous patterns, and the inner electrode pattern Each of the outer electrode patterns is continuous with the outer electrode pattern through an electrode-free region formed at at least one corner of the outer electrode pattern in the vibrator element.
〈作用〉
本発明に係る圧電振動子は、平行四辺形の外形
を有して平板状に形成された圧電磁器素体の一面
上に、その外周縁に沿つて外側電極を設けると共
に、この外側電極の内側にギヤツプを隔てて内側
電極を設け、圧電磁器素体の他面側に内側電極及
び外側電極に共通に対向する対向電極を設けたか
ら、角板型の圧電振動子となる。このため、一枚
の圧電磁器素体上に複数個の圧電振動子要素を形
成した圧電振動子要素集合体を、直線的に切断す
ることによつて製造できるようになり、打抜き加
工等を経なければならない円板状圧電振動子と比
較して、製造が容易であり、圧電磁器素体の無駄
が少なくて済む。<Function> The piezoelectric vibrator according to the present invention has an outer electrode provided along the outer periphery on one surface of a piezoelectric ceramic element having a parallelogram outer shape and formed into a flat plate. An inner electrode is provided inside the electrode with a gap therebetween, and a counter electrode that commonly faces the inner electrode and the outer electrode is provided on the other side of the piezoelectric ceramic body, resulting in a square plate type piezoelectric vibrator. For this reason, it has become possible to manufacture a piezoelectric vibrator element assembly in which a plurality of piezoelectric vibrator elements are formed on a single piezoelectric ceramic body by cutting it in a straight line, and by going through a punching process, etc. Compared to a disc-shaped piezoelectric vibrator, which requires the use of a piezoelectric vibrator, it is easier to manufacture, and there is less waste of the piezoelectric ceramic body.
上述した角型圧電振動子において、圧電磁器素
体の四隅部の少なくとも一隅部に、外側電極の存
在しない領域を設けたから、角型圧電振動子にお
いて発生する高調波スプリアスを確実に抑圧する
ことができる。 In the above-mentioned square piezoelectric vibrator, since an area where no outer electrode exists is provided in at least one of the four corners of the piezoelectric ceramic body, harmonic spurious generated in the square piezoelectric vibrator can be reliably suppressed. can.
しかも、外側電極の存在しない領域を通つて内
側電極を圧電磁器素体の外周端縁に導出したか
ら、外側電極を跨ぐ内側電極用リード導体を必要
とすることなしに、内側電極を外部に引出すこと
ができ、内部電極引き出し構造が簡単になる。ま
た、後で詳述するように、分極処理を集合体の形
で一挙に行ない、分極処理作業能率を向上させ
て、量産性を上げ、コストダウンを達成すること
が可能になる。 Moreover, since the inner electrode is led out to the outer peripheral edge of the piezoelectric ceramic body through the area where the outer electrode does not exist, the inner electrode can be led out to the outside without requiring a lead conductor for the inner electrode that straddles the outer electrode. This simplifies the internal electrode extraction structure. Furthermore, as will be described in detail later, the polarization process can be performed all at once in the form of an aggregate, thereby improving the efficiency of the polarization process, increasing mass productivity, and reducing costs.
本発明に係る圧電振動子要素集合体は、一枚の
圧電磁器素体上に複数個の未分極の圧電振動子要
素を形成した圧電振動子要素集合体において、前
記圧電振動子要素の各々は、前記圧電磁器素体の
一面上に形成された内側電極パターン、この内側
電極パターンをギヤツプを介して包囲するように
形成された外側電極パターン及び前記圧電磁器素
体の他面側において前記内側電極パターン及び外
側電極パターンに共通に対向する対向電極パター
ンを備え、各圧電振動子要素の前記外側電極パタ
ーンは互いに連続するパターンとし、前記内側電
極パターンは各圧電振動子要素における前記外側
電極パターンの少なくとも一つの隅部に形成され
た電極非形成領域を通して外側電極パターンにそ
れぞれ連続させたから、前述の圧電振動子を得る
に当つて、分極作業が簡単で、個々の圧電振動子
を簡単に取出すことができ、しかも保管等に便利
な圧電振動子要素集合体が得られる。 A piezoelectric vibrator element assembly according to the present invention is a piezoelectric vibrator element assembly in which a plurality of unpolarized piezoelectric vibrator elements are formed on a single piezoelectric ceramic element, in which each of the piezoelectric vibrator elements is , an inner electrode pattern formed on one surface of the piezoelectric ceramic element, an outer electrode pattern formed to surround the inner electrode pattern through a gap, and the inner electrode on the other surface of the piezoelectric ceramic element. The outer electrode pattern of each piezoelectric vibrator element includes a counter electrode pattern that commonly faces the pattern and the outer electrode pattern, the outer electrode pattern of each piezoelectric vibrator element is a mutually continuous pattern, and the inner electrode pattern has at least one of the outer electrode patterns of each piezoelectric vibrator element. Since the electrode patterns are connected to each other through the non-electrode forming area formed at one corner, the polarization process is easy and the individual piezoelectric vibrators can be easily taken out when obtaining the piezoelectric vibrator described above. A piezoelectric vibrator element assembly that can be easily stored and conveniently stored can be obtained.
〈実施例〉
第４図は本発明に係る圧電振動子の平面図、第
５図は第４図B1−B1線上における断面図である。
図において、第１図及び第２図と同一の参照符号
は同一性ある構成部分を示す。図示するように、
平行四辺形の外形を有して平板状に形成された圧
電磁器素体１の一面上の外周縁に沿つて、外側電
極２を矩形リング状に設けると共に、この外側電
極２の内側にギヤツプg1を隔てて、内側電極３を
矩形状に設け、更に圧電磁器素体１の他面の略全
面に内側電極３及び外側電極２に共通に対向する
対向電極４を設けた構造となつている。この角板
型圧電振動子は、一枚の圧電磁器素体１上に複数
個の圧電振動子要素を形成した圧電振動子要素集
合体を、直線的に切断することによつて製造でき
る。このため、打抜き加工等を経なければならな
い円板状圧電振動子と比較して、製造が容易であ
り、圧電磁器素体１の無駄が少なくて済む。<Example> FIG. 4 is a plan view of a piezoelectric vibrator according to the present invention, and FIG. 5 is a sectional view taken along the line B1 - B1 in FIG.
In the figures, the same reference numerals as in FIGS. 1 and 2 indicate identical components. As shown,
An outer electrode 2 is provided in the shape of a rectangular ring along the outer periphery of one surface of the piezoelectric ceramic body 1, which is formed into a flat plate shape with a parallelogram outer shape, and a gap g is provided inside the outer electrode 2. 1 , an inner electrode 3 is provided in a rectangular shape, and a counter electrode 4 that commonly faces the inner electrode 3 and the outer electrode 2 is provided on substantially the entire other surface of the piezoelectric ceramic body 1. . This square plate type piezoelectric vibrator can be manufactured by linearly cutting a piezoelectric vibrator element assembly in which a plurality of piezoelectric vibrator elements are formed on a single piezoelectric ceramic body 1. Therefore, compared to a disc-shaped piezoelectric vibrator that requires punching or the like, it is easier to manufacture and there is less waste of the piezoelectric ceramic body 1.
外側電極２を矩形リング状に設ける場合に、圧
電磁器素体１の四隅部イ〜ニの内の少なくとも一
つの隅部イに、外側電極２の存在しない領域７を
設ける。この実施例では、領域７は隅部イの頂角
を構成する二辺８，９から対角方向に向かつて、
外側電極２を分断するように形成されている。 When the outer electrode 2 is provided in a rectangular ring shape, a region 7 where the outer electrode 2 does not exist is provided at at least one corner A of the four corners A to D of the piezoelectric ceramic body 1. In this embodiment, the area 7 faces diagonally from the two sides 8 and 9 forming the apex angle of the corner A, and
It is formed so as to divide the outer electrode 2.
そして、前記隅部イに対応する内側電極３の隅
部から領域７を通り圧電磁器素体１の隅部イの外
周端縁に向つて延びるリード電極部１０を設け、
該リード電極部１０により内側電極３を圧電磁器
素体１の外周端縁に導出してある。 Then, a lead electrode portion 10 is provided extending from the corner of the inner electrode 3 corresponding to the corner A through the region 7 toward the outer peripheral edge of the corner A of the piezoelectric ceramic body 1,
The inner electrode 3 is led out to the outer peripheral edge of the piezoelectric ceramic body 1 through the lead electrode portion 10 .
上述のように、圧電磁器素体１の四隅部イ〜ニ
の少なくとも一隅部イに、外側電極２の存在しな
い領域７を設けると、高調波スプリアスを確実に
抑圧することができることが解つた。例えば、基
本共振周波数をAMバンドの455kHzに選定した場
合には、650kHz、950kHz付近における各スプリ
アスを抑圧できる。第６図は第１図及び第２図に
示した従来の圧電振動子の周波数一利得特性図、
第７図は第４図及び第５図に示した圧電振動子の
周波数一利得特性図である。第６図と第７図との
比較から明らかなように、基本共振周波数455k
Hzに対して、650kHz、950kHzの何れの高調波に
おけるスプリアス減衰量も、本発明に係る圧電振
動子の方が従来例の場合より大きくなつている。
より詳しいデータを挙げると、基本共振周波数
455kHzに対して、650kHz及び950kHz付近のスプ
リアス減衰量が、第１図及び第２図に示す従来例
では、それぞれ、−13.23dB及び−9.64dBであつ
たが、本発明の実施例では、それぞれ、−
17.10dB及び−11.45dBとなり、明らかなスプリ
アス改善効果が得られた。 As mentioned above, it has been found that harmonic spurious can be reliably suppressed by providing the region 7 where the outer electrode 2 does not exist in at least one corner A of the four corners A to D of the piezoelectric ceramic body 1. For example, if the fundamental resonance frequency is selected to be 455kHz in the AM band, each spurious at around 650kHz and 950kHz can be suppressed. FIG. 6 is a frequency-gain characteristic diagram of the conventional piezoelectric vibrator shown in FIGS. 1 and 2,
FIG. 7 is a frequency-gain characteristic diagram of the piezoelectric vibrator shown in FIGS. 4 and 5. FIG. As is clear from the comparison between Figures 6 and 7, the fundamental resonance frequency is 455k.
With respect to Hz, the amount of spurious attenuation at both harmonics of 650 kHz and 950 kHz is larger in the piezoelectric vibrator according to the present invention than in the conventional example.
To give more detailed data, the fundamental resonant frequency
With respect to 455kHz, the spurious attenuation around 650kHz and 950kHz was -13.23dB and -9.64dB, respectively, in the conventional examples shown in Figs. ,−
The results were 17.10dB and -11.45dB, and a clear spurious improvement effect was obtained.
また、外側電極２の存在しない領域７を通つて
内側電極３を圧電磁器素体１の外周端縁に導出し
たから、外側電極２を跨ぐ内側電極用リード導体
を必要とすることなしに、内側電極３を外部に引
出すことができ、内部電極引き出し構造が簡単に
なる。 In addition, since the inner electrode 3 is led out to the outer peripheral edge of the piezoelectric ceramic body 1 through the region 7 where the outer electrode 2 does not exist, there is no need for a lead conductor for the inner electrode that straddles the outer electrode 2. The electrode 3 can be drawn out to the outside, and the internal electrode drawing structure becomes simple.
更に、圧電磁器素体１の四隅部イ〜〜ニの少な
くとも一隅部イに、外側電極２の存在しない領域
７を設け、前記隅部イに対応する内側電極３の隅
部から、領域７の間を通り、圧電磁器素体１の隅
部イの外周端縁に向つて延びるリード電極部１０
を設け、該リード電極部１０により内側電極３を
圧電磁器素体１の外周端縁に導出したことによ
り、分極処理を集合体の形で一挙に行ない、分極
処理作業能率を向上させて、量産性を上げ、コス
トダウンを達成することが可能になる。次にこれ
を本発明に係る圧電振動子要素集合体と共に説明
する。 Further, a region 7 where the outer electrode 2 does not exist is provided in at least one corner A of the four corners A to D of the piezoelectric ceramic body 1, and a region 7 where the outer electrode 2 does not exist is provided from the corner of the inner electrode 3 corresponding to the corner A. The lead electrode portion 10 extends toward the outer peripheral edge of the corner A of the piezoelectric ceramic body 1 through the gap.
By introducing the inner electrode 3 to the outer peripheral edge of the piezoelectric ceramic body 1 through the lead electrode portion 10, the polarization process can be performed all at once in the form of an aggregate, improving the efficiency of the polarization process and facilitating mass production. This makes it possible to improve performance and reduce costs. Next, this will be explained together with the piezoelectric vibrator element assembly according to the present invention.
第８図は本発明に係る圧電振動子要素集合体の
一部の平面図、第９図は第８図のX1−X1線上に
おける断面図である。図において、１１は焼結済
の一枚の圧電磁器素体である。この圧電磁器素体
１１の上には複数個の圧電振動子要素Q11〜Q44
を縦及び横方向に配列して形成してある。これら
の圧電振動子要素Q11〜Q44の各々は、未分極で
あつて、圧電磁器素体１１の一面上に矩形状に形
成された内側電極パターン１３、この内側電極パ
ターン１３をギヤツプG1を介して矩形状に包囲
するように形成された外側電極パターン１２及び
圧電磁器素体１１の他面側において内側電極パタ
ーン１３及び外側電極パターン１２に共通に対向
する対向電極パターン１４を備えている。ここ
で、各圧電振動子要素Q11〜Q44の外側電極パタ
ーン１２は互いに連続するパターンとし、また内
側電極パターン１３は圧電振動子要素Q11〜Q44
における外側電極パターン１２の少なくとも一つ
の隅部に形成された電極非形成領域１７を通して
外側電極パターン１２にそれぞれ連続させてあ
る。従つて、集合体の状態では、内側電極パター
ン１３及び外側電極パターン１２は連続したパタ
ーンとなつていて、電気的には同一電位となる。
このため、分極する場合、内側電極１３または外
側電極パターン１２と対向電極パターン１４との
間に直流電源１６からの直流電圧を印加（第９図
参照）するだけで、分極処理を行なうことがで
き、分極処理作業が非常に簡単になり、量産性が
向上し、コストが安価になる。 FIG. 8 is a plan view of a part of the piezoelectric vibrator element assembly according to the present invention, and FIG. 9 is a sectional view taken along the line X 1 -X 1 in FIG. 8. In the figure, 11 is a piece of sintered piezoelectric ceramic element. On this piezoelectric ceramic body 11, a plurality of piezoelectric vibrator elements Q 11 to Q 44 are arranged.
are arranged vertically and horizontally. Each of these piezoelectric vibrator elements Q 11 to Q 44 is unpolarized and has an inner electrode pattern 13 formed in a rectangular shape on one surface of the piezoelectric ceramic body 11, and a gap G 1 between the inner electrode pattern 13 and a rectangular inner electrode pattern 13. An outer electrode pattern 12 is formed to surround the piezoelectric ceramic body 11 in a rectangular shape, and a counter electrode pattern 14 is provided which commonly faces the inner electrode pattern 13 and the outer electrode pattern 12 on the other side of the piezoelectric ceramic body 11. . Here, the outer electrode patterns 12 of the piezoelectric vibrator elements Q 11 to Q 44 are continuous patterns, and the inner electrode patterns 13 of the piezoelectric vibrator elements Q 11 to Q 44 are continuous.
The outer electrode patterns 12 are connected to each other through an electrode non-forming region 17 formed at at least one corner of the outer electrode patterns 12 in the . Therefore, in the aggregate state, the inner electrode pattern 13 and the outer electrode pattern 12 form a continuous pattern and have the same electrical potential.
Therefore, when polarizing, the polarization process can be performed simply by applying a DC voltage from the DC power supply 16 between the inner electrode 13 or outer electrode pattern 12 and the counter electrode pattern 14 (see FIG. 9). , the polarization process becomes very simple, mass productivity is improved, and costs are reduced.
また、上述のような電極パターンであると、
（X1−X1）〜（X4−X4）及び（Y1−Y1）〜（Y4
−Y4）の位置で切断することにより、集合体上
の各圧電振動子要素Q11〜Q44を簡単に取出すこ
とができる。このため、各圧電振動子の切出し作
業が簡単になる。しかも、複数の圧電振動子要素
Q11〜Q44を同一の圧電磁器素体１１の上に形成
してあるので、圧電振動子単独の場合より、保管
及び持運び等に便利である。 In addition, if the electrode pattern is as described above,
(X 1 −X 1 )～(X 4 −X 4 ) and (Y 1 −Y 1 )～(Y 4
-Y 4 ), each piezoelectric vibrator element Q 11 to Q 44 on the assembly can be easily taken out. This simplifies the work of cutting out each piezoelectric vibrator. Moreover, multiple piezoelectric vibrator elements
Since Q 11 to Q 44 are formed on the same piezoelectric ceramic body 11, it is more convenient to store and carry than a piezoelectric vibrator alone.
〈本発明の効果〉
以上述べたように、本発明によれば、次のよう
な効果を得ることができる。<Effects of the Present Invention> As described above, according to the present invention, the following effects can be obtained.
(a) 角型の圧電振動子であるので、一枚の圧電磁
器素体上に複数個の圧電振動子要素を形成した
圧電振動子要素集合体を、直線的に切断するこ
とによつて製造でき、打抜き加工等を経なけれ
ばならない円板状圧電振動子と比較して、製造
が容易であり、圧電磁器素体の無駄が少なくて
済む圧電振動子を提供できる。(a) Since it is a square piezoelectric vibrator, it is manufactured by cutting a piezoelectric vibrator element assembly in which a plurality of piezoelectric vibrator elements are formed on a single piezoelectric ceramic body in a straight line. It is possible to provide a piezoelectric vibrator that is easier to manufacture and requires less wasted piezoelectric ceramic body than a disk-shaped piezoelectric vibrator that requires punching or the like.
(b) 角型圧電振動子において発生する高調波スプ
リアスを確実に抑圧し得る圧電振動子を提供で
きる。(b) A piezoelectric vibrator that can reliably suppress harmonic spurious generated in a square piezoelectric vibrator can be provided.
(c) 外側電極の存在しない領域を通つて内側電極
を圧電磁器素体の外周端縁に導出したから、外
側電極を跨ぐ内側電極用リード導体を必要とす
ることなしに、内側電極を外部に引出すことが
でき、内部電極引き出し構造を簡単化し得る圧
電振動子を提供できる。(c) Since the inner electrode is led out to the outer peripheral edge of the piezoelectric ceramic body through the area where the outer electrode does not exist, the inner electrode can be led to the outside without requiring a lead conductor for the inner electrode that straddles the outer electrode. It is possible to provide a piezoelectric vibrator that can be drawn out and whose internal electrode drawing structure can be simplified.
(d) 分極処理を集合体の形で一挙に行ない、分極
処理作業能率を向上させて、量産性を上げ、コ
ストダウンを達成し得る圧電振動子を提供でき
る。(d) It is possible to provide a piezoelectric vibrator that can perform polarization treatment all at once in the form of an aggregate, improve polarization treatment efficiency, increase mass productivity, and achieve cost reduction.
(e) 本発明に係る圧電振動子を得るに当つて、分
極作業が簡単で、個々の圧電振動子を簡単に取
出すことができ、しかも保管等に便利な圧電振
動子要素集合体を提供できる。(e) In obtaining the piezoelectric vibrator according to the present invention, it is possible to provide a piezoelectric vibrator element assembly in which polarization is easy, individual piezoelectric vibrators can be easily taken out, and furthermore, it is convenient for storage, etc. .
第１図は従来の圧電振動子の平面図、第２図は
第１図のA1−A1線上における断面図、第３図は
従来の圧電振動子の分極方法を説明する図、第４
図は本発明に係る圧電振動子の平面図、第５図は
第４図B1−B1線上における断面図、第６図は従
来の圧電振動子の周波数−利得特性図、第７図は
第４図及び第５図に示した本発明に係る圧電振動
子の周波数−利得特性図、第８図は本発明に係る
圧電振動子要素集合体の一部の平面図、第９図は
第８図のX1−X1線上断面図である。
１……圧電磁器素体、２……外側電極、３……
内側電極、４……対向電極、５……外側電極の存
在しない領域、イ……隅部、１０……リード電極
部。
Figure 1 is a plan view of a conventional piezoelectric vibrator, Figure 2 is a cross-sectional view taken along line A1 - A1 in Figure 1, Figure 3 is a diagram explaining the polarization method of a conventional piezoelectric vibrator, and Figure 4 is a diagram illustrating the polarization method of a conventional piezoelectric vibrator.
The figure is a plan view of a piezoelectric vibrator according to the present invention, FIG . 4 and 5 are frequency-gain characteristic diagrams of the piezoelectric vibrator according to the present invention, FIG. 8 is a plan view of a part of the piezoelectric vibrator element assembly according to the present invention, and FIG. 9 is a partial plan view of the piezoelectric vibrator element assembly according to the present invention. 8 is a sectional view taken along the line X 1 -X 1 in FIG. 8. FIG. 1...Piezoelectric ceramic element body, 2...Outer electrode, 3...
Inner electrode, 4... Counter electrode, 5... Area where no outer electrode exists, A... Corner, 10... Lead electrode portion.
Claims (1)
た圧電磁器素体の一面上に、その外周縁に沿つて
外側電極を設けると共に、この外側電極の内側に
ギヤツプを隔てて内側電極を設け、前記圧電磁器
素体の他面側に前記内側電極及び外側電極に共通
に対向する対向電極を設けた圧電振動子におい
て、前記圧電磁器素体の少なくとも一つの隅部に
前記外側電極の存在しない領域を設け、該領域を
通つて前記内側電極を前記圧電磁器素体の外周端
縁に導出したことを特徴とする圧電振動子。 ２ 一枚の圧電磁器素体上に複数個の未分極の圧
電振動子要素を形成した圧電振動子要素集合体に
おいて、前記圧電振動子要素の各々は、前記圧電
磁器素体の一面上に形成された内側電極パター
ン、この内側電極パターンをギヤツプを介して包
囲するように形成された外側電極パターン及び前
記圧電磁器素体の他面側において前記内側電極パ
ターン及び外側電極パターンに共通に対向する対
向電極パターンを備え、各圧電振動子要素の前記
外側電極パターンは互いに連続するパターンと
し、前記内側電極パターンは各圧電振動子要素に
おける前記外側電極パターンの少なくとも一つの
隅部に形成された電極非形成領域を通して外側電
極パターンにそれぞれ連続させたことを特徴とす
る圧電振動子要素集合体。[Claims] 1. An outer electrode is provided along the outer periphery on one surface of a piezoelectric ceramic element having a parallelogram outer shape and formed into a flat plate, and a gap is provided inside the outer electrode. In the piezoelectric vibrator, an inner electrode is provided with an inner electrode spaced apart from the piezoelectric ceramic element, and a counter electrode that commonly faces the inner electrode and the outer electrode is provided on the other side of the piezoelectric ceramic element, at least one corner of the piezoelectric ceramic element. A piezoelectric vibrator characterized in that a region where the outer electrode does not exist is provided in the piezoelectric vibrator, and the inner electrode is led out to the outer peripheral edge of the piezoelectric ceramic body through the region. 2. In a piezoelectric vibrator element assembly in which a plurality of unpolarized piezoelectric vibrator elements are formed on a single piezoelectric ceramic element, each of the piezoelectric vibrator elements is formed on one surface of the piezoelectric ceramic element. an inner electrode pattern, an outer electrode pattern formed to surround the inner electrode pattern via a gap, and an opposing electrode pattern that commonly faces the inner electrode pattern and the outer electrode pattern on the other side of the piezoelectric ceramic body. The outer electrode patterns of each piezoelectric vibrator element are continuous patterns, and the inner electrode pattern is a non-electrode pattern formed at at least one corner of the outer electrode pattern of each piezoelectric vibrator element. A piezoelectric vibrator element assembly characterized in that each region is continuous with an outer electrode pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12709584A JPS614315A (en) | 1984-06-19 | 1984-06-19 | Piezoelectric vibrator and piezoelectric vibrator assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12709584A JPS614315A (en) | 1984-06-19 | 1984-06-19 | Piezoelectric vibrator and piezoelectric vibrator assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS614315A JPS614315A (en) | 1986-01-10 |
| JPH0584685B2 true JPH0584685B2 (en) | 1993-12-02 |
Family
ID=14951458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12709584A Granted JPS614315A (en) | 1984-06-19 | 1984-06-19 | Piezoelectric vibrator and piezoelectric vibrator assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS614315A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666624B2 (en) * | 1986-02-24 | 1994-08-24 | 東光株式会社 | Method of manufacturing piezoelectric vibrating element |
| JPH07109971B2 (en) * | 1989-02-20 | 1995-11-22 | 株式会社村田製作所 | Filter device |
| JPH04102405U (en) * | 1991-01-21 | 1992-09-03 | 株式会社山田製作所 | gauge holder |
| US5185589A (en) * | 1991-05-17 | 1993-02-09 | Westinghouse Electric Corp. | Microwave film bulk acoustic resonator and manifolded filter bank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5496987A (en) * | 1978-01-17 | 1979-07-31 | Seikosha Kk | Piezooelectric vibrator |
-
1984
- 1984-06-19 JP JP12709584A patent/JPS614315A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS614315A (en) | 1986-01-10 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |