JP2003133893A - Quartz vibrator structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that short circuit may be caused at mounting on a circuit board because two external electrodes are too close to each other in a structure in which the external electrodes are provided on a lower box body side in a conventional technique, and a problem that it is hard to gain conduction from an upper box body side in a structure in which the external electrodes are separately provided on the upper and lower box body sides, respectively. SOLUTION: One electrode of a quartz vibrator is connected electrically to an external electrode provided to an end of the lower surface of the lower box body through a through hole. The other electrode is connected electrically to another external electrode provided to an end on the opposite side of the lower surface of the lower box body through a frame-part metal film provided to a frame part of the quartz oscillator, an upper joining member and a lower joining member, so that the two external electrodes are provided on the lower box body side while keeping distance. Consequently, mounting onto the circuit board is easily done.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、時計や移動体通信
機の基準信号源として用いられる水晶振動子を筐体に収
納した水晶振動子構造体に関する。詳しくは、水晶振動
子と水晶振動子を囲む枠部とが一体に形成されており、
上部筐体と下部筐体とが該枠部を挟持して気密封止され
る水晶振動子構造体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crystal oscillator structure in which a crystal oscillator used as a reference signal source for a timepiece or a mobile communication device is housed. Specifically, the crystal unit and the frame surrounding the crystal unit are integrally formed,
The present invention relates to a crystal unit structure in which an upper housing and a lower housing sandwich the frame portion and are hermetically sealed.

【０００２】[0002]

【従来の技術】時計や移動体通信機の基準信号源として
２本の振動する脚を持った、いわゆる音叉型の水晶振動
子が広く用いられている。このような水晶振動子は振動
による空気との摩擦によって性能が落ちるため、真空雰
囲気で用いる必要があり気密封止できる筐体に収納され
た状態で用いられる。最も広く用いられているのは図５
に示すような筐体を金属からなる円筒で構成した円筒型
水晶振動子構造体２５である。内部にある水晶振動子と
外部との導通は底面部に設けられた２本のリード線２７
を介して行われる。リード線は筐体の底部において貫通
しており、筐体の内部と外部とを導通している。貫通部
はガラスよって埋められており、絶縁を図ると同時に気
密性が保たれている。このような円筒型水晶振動子構造
体２５は図６の様にリード線２７が回路基板２９に接続
された上で横に寝かされるようにして使用される。時計
や移動体通信機の小型化薄型化の要請から水晶振動子構
造体にも薄型化が求められており、その要請に対し、上
記円筒形状では部品の高さが円筒の径によって決まりそ
れ以上は小さくできなかった。この課題に対し様々な提
案がなされているが、特開昭５６−４４２１３号公報で
は水晶振動子と一体に周囲を囲む枠（以下、「水晶振動
子枠板」と称する。）を製作し、例えば図７および図８
の様に水晶振動子枠板１を別に製作した上部筐体９およ
び下部筐体１１で挟み込むことにより水晶振動子構造体
を得る技術が開示されている。この構造によれば、水晶
振動子構造体を薄くすることが出来る。該公報では内部
の水晶振動子の電極、即ち内部電極と筐体外部にあり回
路基板とを接続するために用いる外部電極２１との導通
は筐体に開けられた貫通孔３によってなしている。貫通
孔は図７の様に下部筐体に二つ開けて、二つの外部電極
を近接して設ける構造と図８の様に上部筐体と下部筐体
のそれぞれに一つずつ貫通孔３を開けて水晶振動子構造
体の上面および下面に極性の異なる外部電極２１を一つ
ずつ設ける構造がある。2. Description of the Related Art A so-called tuning fork type crystal oscillator having two vibrating legs is widely used as a reference signal source for a timepiece and a mobile communication device. The performance of such a crystal oscillator deteriorates due to friction with air due to vibration, and thus it is necessary to use it in a vacuum atmosphere and used in a state where it is housed in a hermetically sealed case. Figure 5 is the most widely used
It is a cylindrical crystal resonator structure 25 in which the casing as shown in (1) is made of a metal cylinder. Conduction between the crystal unit inside and the outside is done by two lead wires 27 provided on the bottom surface.
Done through. The lead wire penetrates through the bottom of the housing and connects the inside and the outside of the housing. The penetrating part is filled with glass, and at the same time airtightness is maintained while achieving insulation. Such a cylindrical crystal oscillator structure 25 is used such that the lead wire 27 is connected to the circuit board 29 and then laid down sideways as shown in FIG. Due to the demand for smaller and thinner watches and mobile communication equipment, the quartz crystal structure is also required to be thinner. In response to the request, the height of the parts in the above-mentioned cylindrical shape is determined by the diameter of the cylinder. Couldn't be smaller. Although various proposals have been made for this problem, in Japanese Patent Laid-Open No. 56-44213, a frame surrounding the crystal unit (hereinafter referred to as "crystal unit frame plate") is manufactured, For example, FIG. 7 and FIG.
As described above, there is disclosed a technique for obtaining a crystal resonator structure by sandwiching the crystal resonator frame plate 1 between the separately manufactured upper housing 9 and lower housing 11. According to this structure, the crystal resonator structure can be thinned. In this publication, the electrode of the internal crystal unit, that is, the external electrode 21 which is outside the housing and is used for connecting the circuit board is electrically connected by the through hole 3 formed in the housing. As shown in FIG. 7, two through-holes are provided in the lower housing, and two external electrodes are provided close to each other. One through-hole 3 is provided in each of the upper housing and the lower housing as shown in FIG. There is a structure in which external electrodes 21 having different polarities are provided one by one on the upper surface and the lower surface of the crystal resonator structure when opened.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上述し
た従来の技術では、下部筐体に二つの外部電極を近接し
て設けた構造では、回路基板への実装時に両者が短絡し
てしまうことがあるという課題があった。これを避ける
ため二つの外部電極の距離を離すと平面寸法が大きくな
ってしまうという課題があった。また、上部筐体と下部
筐体のそれぞれに一つずつ外部電極を設ける構造では、
回路基板への実装時に上部筐体に設けた外部電極との導
通を得ることが困難であるという課題があった。However, in the above-mentioned conventional technique, in the structure in which the two external electrodes are provided close to each other in the lower housing, they may be short-circuited during mounting on the circuit board. There was a problem. If the two external electrodes are separated from each other in order to avoid this, there is a problem that the plane dimension becomes large. Further, in the structure in which one external electrode is provided for each of the upper housing and the lower housing,
There is a problem that it is difficult to obtain electrical continuity with the external electrodes provided on the upper housing when the semiconductor device is mounted on the circuit board.

【０００４】上記課題を解決するため、本発明の目的
は、平面寸法を変更することなく下部筐体の下面に２つ
の外部電極を設け、回路基板への実装を容易にするとと
もに、実装による短絡の発生が生じることのない水晶振
動子構造体を提供することにある。In order to solve the above-mentioned problems, an object of the present invention is to provide two external electrodes on the lower surface of the lower housing without changing the plane dimension, to facilitate mounting on a circuit board and to cause a short circuit due to mounting. It is an object of the present invention to provide a crystal oscillator structure in which the occurrence of

【０００５】[0005]

【課題を解決するための手段】上記課題を達成するため
に、本発明では、水晶振動子と水晶振動子を囲む枠部を
一体化した水晶振動子枠板と、第１の筐体と、第２の筐
体を備え、水晶振動子枠板を第１の筐体と該第２の筐体
で挟み込んで気密封止する水晶振動子構造体において、
枠部の上面と下面と側面のそれぞれの少なくとも一部に
枠部金属膜を設け、枠部の上面は、導電性を有する上部
接合部材を介して第１の筐体と接合されるとともに、枠
部の下面は、導電性を有する下部接合部材を介して第２
の筐体と接合され、水晶振動子の一方の内部電極は、枠
部金属膜と上部接合部材と下部接合部材と第２の筐体の
下面に設けられた一方の外部電極に導通され、水晶振動
子の他方の内部電極は、枠部金属膜と第２の筐体に設け
られた貫通孔と第２の筐体の下面に設けられた他方の外
部電極に導通されていることを特徴とする。In order to achieve the above object, according to the present invention, a crystal oscillator frame plate in which a crystal oscillator and a frame portion surrounding the crystal oscillator are integrated, a first casing, A crystal unit structure including a second case, wherein a crystal unit frame plate is hermetically sealed by sandwiching the crystal unit frame plate between the first unit and the second unit,
A frame metal film is provided on at least a part of each of the upper surface, the lower surface, and the side surface of the frame section, and the upper surface of the frame section is bonded to the first housing through an upper bonding member having conductivity, and at the same time, the frame is formed. The lower surface of the portion is connected to the second lower surface through a lower joint member having conductivity.
And one of the internal electrodes of the crystal unit is electrically connected to the frame metal film, the upper bonding member, the lower bonding member, and one external electrode provided on the lower surface of the second housing. The other internal electrode of the vibrator is electrically connected to the frame metal film, the through hole provided in the second housing, and the other external electrode provided on the lower surface of the second housing. To do.

【０００６】また、上記課題を達成するために、本発明
では、水晶振動子と水晶振動子を囲む枠部を一体化した
水晶振動子枠板と、第１の筐体と、第２の筐体を備え、
水晶振動子枠板を第１の筐体と第２の筐体で挟み込んで
気密封止する水晶振動子構造体において、枠部の下面の
少なくとも一部に枠部金属膜を設け、枠部の上面は、導
電性を有する上部接合部材を介して第１の筐体と接合さ
れるとともに、枠部の下面は、導電性を有する下部接合
部材を介して第２の筐体と接合され、水晶振動子の一方
の内部電極は、枠部金属膜と下部接合部材と第２の筐体
の下面に設けられた一方の外部電極に導通され、水晶振
動子の他方の内部電極は、枠部金属膜と第２の筐体に設
けられた貫通孔と第２の筐体の下面に設けられた他方の
外部電極に導通されていることを特徴とする。In order to achieve the above object, according to the present invention, a crystal oscillator frame plate in which a crystal oscillator and a frame portion surrounding the crystal oscillator are integrated, a first casing, and a second casing. Equipped with a body,
In a quartz oscillator structure in which a quartz oscillator frame plate is sandwiched between a first casing and a second casing and hermetically sealed, a frame portion metal film is provided on at least a part of a lower surface of the frame portion, The upper surface is joined to the first casing through the conductive upper joining member, and the lower surface of the frame portion is joined to the second casing through the conductive lower joining member. One of the internal electrodes of the oscillator is electrically connected to the frame metal film, the lower bonding member, and one external electrode provided on the lower surface of the second casing, and the other internal electrode of the crystal oscillator is connected to the frame metal. It is characterized in that the film, the through hole provided in the second housing, and the other external electrode provided on the lower surface of the second housing are electrically connected.

【０００７】さらに、本発明による水晶振動子構造体に
おける一方の外部電極と他方の外部電極は、それぞれ第
２の筐体の長手方向の両端部に位置することを特徴とす
る。Further, in the crystal resonator structure according to the present invention, one external electrode and the other external electrode are located at both ends in the longitudinal direction of the second casing.

【０００８】本発明では、水晶振動子を囲む枠部を一方
の電極の一部として用いることによって、内部電極の一
方を水晶振動子の基部とは反対側に導くことができるの
で、２つの外部電極の距離を離すことができる。In the present invention, by using the frame portion surrounding the crystal unit as a part of the one electrode, one of the internal electrodes can be guided to the side opposite to the base unit of the crystal unit, so that two external electrodes can be introduced. The electrodes can be separated.

【０００９】[0009]

【発明の実施の形態】以下、本発明による実施の形態を
図面に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

【００１０】（実施例）図１から図３は本発明による水
晶振動子構造体の形態を示す図である。図１は本発明に
よる水晶振動子構造体の斜視図である。図２は本発明に
よる水晶振動子構造体を構成する部品の一つである水晶
振動子枠板１の図である。図３は本発明による水晶振動
子構造体の貫通孔３を通る断面図である。本発明による
水晶振動子構造体は水晶振動子５とそれを支える枠部７
とからなる水晶振動子枠板１と水晶振動子枠板１を枠部
７で挟持する上部筐体９および下部筐体１１とからな
る。上部筐体９および下部筐体１１には水晶振動子との
干渉を避けるために凹部が設けられている。図１では下
面の様子を見やすくするために上部筐体９を下に描き、
下部筐体１１を上に描いている。実際には下部筐体側を
回路基板側に付着して実装される。(Embodiment) FIGS. 1 to 3 are views showing a form of a crystal resonator structure according to the present invention. FIG. 1 is a perspective view of a crystal resonator structure according to the present invention. FIG. 2 is a view of a crystal unit frame plate 1 which is one of the components constituting the crystal unit structure according to the present invention. FIG. 3 is a sectional view through the through hole 3 of the crystal unit structure according to the present invention. The crystal unit structure according to the present invention includes a crystal unit 5 and a frame portion 7 supporting the crystal unit 5.
The crystal resonator frame plate 1 and the upper and lower cases 9 and 11 sandwiching the crystal resonator frame plate 1 with the frame portion 7. The upper casing 9 and the lower casing 11 are provided with recesses in order to avoid interference with the crystal unit. In FIG. 1, the upper housing 9 is drawn below in order to make it easier to see the state of the lower surface.
The lower housing 11 is drawn above. Actually, the lower housing side is attached to the circuit board side for mounting.

【００１１】水晶振動子枠板１、上部筐体９および下部
筐体１１はそれぞれ水晶から構成され、フッ酸とフッ化
アンモニウム水溶液を混合した液体を用いたエッチング
加工によって形成される。本発明の水晶振動子枠板１、
上部筐体９および下部筐体１１は同じ結晶方位を有する
水晶からなる。これは熱膨張による接合部への影響を軽
減するためである。本発明の水晶振動子構造体では水晶
振動子５の脚の幅方向は水晶の結晶軸のＸ軸方向に一致
している。脚の伸びている方向および厚み方向は、それ
ぞれ水晶の結晶軸のＹ軸およびＺ軸に一致させた状態か
らＸ軸を回転軸として角度θ回転した方向である。θは
０〜５°である。水晶振動子枠板１は上述したように水
晶振動子５とそれを支える枠部７で構成される。枠部７
と水晶振動子５は水晶振動子５の基部でつながった構造
をしている。水晶振動子５と枠部７は一体であり、一枚
の水晶板からエッチング加工により形成される。水晶振
動子５には振動を励起するための電極即ち内部電極１３
が設けられている。枠部７の上面、下面、および側面の
一部または全部には枠部金属膜１５が施されている。枠
部金属膜１５の目的は枠部７の上面および下面において
上部筐体９および下部筐体１１を上部接合部材１７およ
び下部接合部材１９を介してそれぞれ接合し気密封止す
ることに用いられることであり、また同時に枠部７の上
面と下面とを電気的に導通をとることである。また、水
晶振動子枠板１の枠部７が当接される上部筐体９および
下部筐体１１の部分には金属膜が施されている。これは
上部筐体９および下部筐体１１を上部接合部材１７およ
び下部接合部材１９を介してそれぞれ水晶振動子枠板１
に接合し、気密封止することに用いられるためである。
上部接合部材１７、下部接合部材１９にはＳｎやＳｎを
約２０ｗｔ％含有するＡｕＳｎ合金などの低融点金属ま
たは低融点の導電性ガラスが用いられる。The crystal resonator frame plate 1, the upper casing 9 and the lower casing 11 are each made of quartz and are formed by etching using a liquid in which hydrofluoric acid and an ammonium fluoride aqueous solution are mixed. Crystal oscillator frame plate 1 of the present invention,
The upper housing 9 and the lower housing 11 are made of quartz having the same crystal orientation. This is to reduce the influence of thermal expansion on the joint. In the crystal resonator structure of the present invention, the width direction of the legs of the crystal resonator 5 coincides with the X-axis direction of the crystal axis of the crystal. The extending direction and the thickness direction of the legs are the directions rotated by the angle θ with the X axis as the axis of rotation from the state in which they are aligned with the Y axis and the Z axis of the crystal axis of quartz, respectively. θ is 0 to 5 °. The crystal oscillator frame plate 1 is composed of the crystal oscillator 5 and the frame portion 7 supporting the crystal oscillator 5 as described above. Frame 7
The crystal oscillator 5 and the crystal oscillator 5 are connected at the base of the crystal oscillator 5. The crystal unit 5 and the frame 7 are integrated, and are formed by etching from a single crystal plate. The crystal oscillator 5 has electrodes for exciting vibration, that is, internal electrodes 13
Is provided. A frame portion metal film 15 is applied to a part or all of the upper surface, the lower surface, and the side surface of the frame portion 7. The purpose of the frame metal film 15 is to bond the upper housing 9 and the lower housing 11 to the upper surface and the lower surface of the frame 7 via the upper joining member 17 and the lower joining member 19, respectively, and hermetically seal them. At the same time, the upper surface and the lower surface of the frame portion 7 are electrically connected to each other. Further, a metal film is applied to the portions of the upper casing 9 and the lower casing 11 with which the frame portion 7 of the crystal unit frame plate 1 is brought into contact. This is because the upper housing 9 and the lower housing 11 are connected via the upper joining member 17 and the lower joining member 19 respectively to the crystal oscillator frame plate 1
This is because it is used for bonding to and hermetically sealing.
For the upper joining member 17 and the lower joining member 19, a low melting point metal such as Sn or an AuSn alloy containing about 20 wt% Sn or a low melting point conductive glass is used.

【００１２】水晶振動子の内部電極１３の一方は、水晶
振動子枠板１の上面側において枠部金属膜１５に接続さ
れており電気的に導通されている。さらに、枠部金属膜
１５は下部接合部材１９を介して下部筐体１１に形成し
た導電体である金属膜によって下部筐体１１の下面の端
部に設けられた外部電極２１に導通がとられている。こ
れによって、水晶振動子５の内部電極１３の一方は上部
接合部材１７、下部接合部材１９および枠部金属膜１５
を介して下部筐体の端部に設けられた外部電極２１と導
通されている。他方の内部電極１３は下部筐体１１に開
けられた貫通孔３を通して下部筐体の反対側の端部に設
けた外部電極２１に導通している。貫通孔３の内側面２
３には真空蒸着などにより金属膜が形成されており、筐
体内部にある水晶振動子の内部電極１３と下部筐体１１
の下面端部に形成された外部電極２１とを導通してい
る。これによって、２つの外部電極を下部筐体の両端部
に配置することができる。One of the internal electrodes 13 of the crystal unit is connected to the frame metal film 15 on the upper surface side of the crystal unit frame plate 1 and is electrically connected. Further, the frame metal film 15 is electrically connected to the external electrode 21 provided at the end of the lower surface of the lower housing 11 by the metal film which is a conductor formed on the lower housing 11 via the lower joining member 19. ing. As a result, one of the internal electrodes 13 of the crystal unit 5 is connected to the upper joining member 17, the lower joining member 19 and the frame metal film 15.
It is electrically connected to the external electrode 21 provided at the end of the lower housing via the. The other internal electrode 13 is electrically connected to an external electrode 21 provided at the opposite end of the lower housing through a through hole 3 formed in the lower housing 11. Inner surface 2 of through hole 3
3, a metal film is formed by vacuum deposition or the like, and the internal electrodes 13 of the crystal unit and the lower housing 11 inside the housing are formed.
Is electrically connected to the external electrode 21 formed at the lower end of the. This allows the two external electrodes to be arranged at both ends of the lower housing.

【００１３】また、図４は、水晶振動子枠板についての
他の実施例を示したものであり、図２と同じ番号を記し
たものは、同じものを表している。図４の場合において
は、水晶振動子枠板の下面のみに枠部金属膜を設けた点
において、水晶振動子枠板の上面と下面と側面のそれぞ
れに枠部金属膜を設けた図２の場合と相違する。図４に
示す水晶振動子枠板を用いても、本願発明の課題を解決
することができる。Further, FIG. 4 shows another embodiment of the crystal oscillator frame plate, and the elements having the same numbers as those in FIG. 2 represent the same elements. In the case of FIG. 4, in that the frame portion metal film is provided only on the lower surface of the crystal unit frame plate, in FIG. 2, the frame portion metal film is provided on each of the upper surface, the lower surface and the side surface of the crystal unit frame plate. Different from the case. The problem of the present invention can also be solved by using the crystal resonator frame plate shown in FIG.

【００１４】本実施例では上部筐体９、下部筐体１１に
水晶を用いた例を示したが、内部電極の片方と外部電極
の導通に枠部を利用することが大切なのであって、本発
明の課題を解決するためには必ずしも水晶を用いる必要
はなく、アルミナ、ジルコニア等のセラミックスあるい
はガラスセラミックスなどを用いても同様な効果が得ら
れるのは明らかである。また、本実施例では水晶振動子
として音叉型の例を示したが、ＡＴ板など２つの電極を
用いて駆動するものであれば本発明が有効であることは
明らかである。In this embodiment, an example in which quartz is used for the upper casing 9 and the lower casing 11 is shown, but it is important to use the frame portion for conduction between one of the internal electrodes and the external electrode. In order to solve the problems of the invention, it is not always necessary to use quartz, and it is clear that the same effect can be obtained by using ceramics such as alumina and zirconia or glass ceramics. In addition, although a tuning fork type crystal oscillator is shown as an example in the present embodiment, it is clear that the present invention is effective as long as it is driven by using two electrodes such as an AT plate.

【００１５】[0015]

【発明の効果】以上に記したように、本発明の水晶振動
子構造体は、回路基板への実装に用いる二つの外部電極
を平面寸法を広げることなく水晶振動子構造体の下面に
共に設けることができるので、回路基板への実装が容易
になるという効果がある。また、二つの外部電極間の距
離を大きくすることができるので回路基板への実装時に
短絡が生じることがないという効果がある。さらに、両
電極間の対向面積が増えることがないので、並列容量を
小さく抑えることができ、周波数可変幅を広く保つこと
ができるという効果がある。As described above, in the crystal resonator structure of the present invention, the two external electrodes used for mounting on the circuit board are provided on the lower surface of the crystal resonator structure without expanding the plane dimension. Therefore, there is an effect that mounting on a circuit board becomes easy. Further, since the distance between the two external electrodes can be increased, there is an effect that a short circuit does not occur during mounting on the circuit board. Further, since the facing area between both electrodes does not increase, the parallel capacitance can be suppressed to be small, and the frequency variable width can be kept wide.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明による水晶振動子構造体の斜視図であ
る。FIG. 1 is a perspective view of a crystal unit structure according to the present invention.

【図２】本発明による水晶振動子構造体を構成する部品
の一つである水晶振動子枠板の図である。FIG. 2 is a diagram of a crystal oscillator frame plate that is one of the components that constitute the crystal oscillator structure according to the present invention.

【図３】本発明による水晶振動子構造体の貫通孔を通る
断面図である。FIG. 3 is a cross-sectional view through a through hole of a crystal resonator structure according to the present invention.

【図４】本発明による水晶振動子構造体を構成する部品
の一つである水晶振動子枠板についての他の実施例を示
す図である。FIG. 4 is a diagram showing another embodiment of the crystal unit frame plate which is one of the components constituting the crystal unit structure according to the present invention.

【図５】従来の円筒型水晶振動子構造体を示す図であ
る。FIG. 5 is a diagram showing a conventional cylindrical crystal resonator structure.

【図６】従来の円筒型水晶振動子構造体の実装状態を示
す図である。FIG. 6 is a diagram showing a mounted state of a conventional cylindrical crystal oscillator structure.

【図７】従来の水晶振動子構造体を示す図である。FIG. 7 is a diagram showing a conventional crystal resonator structure.

【図８】従来の水晶振動子構造体を示す図である。FIG. 8 is a diagram showing a conventional crystal resonator structure.

【符号の説明】[Explanation of symbols]

１ 水晶振動子枠板 ３ 貫通孔 ５ 水晶振動子 ７ 枠部 ９ 上部筐体 １１ 下部筐体 １３ 内部電極 １５ 枠部金属膜 １７ 上部接合部材 １９ 下部接合部材 ２１ 外部電極 ２３ 内側面 ２５ 円筒型水晶振動子構造体 ２７ リード線 ２９ 回路基板 1 Crystal oscillator frame plate 3 through holes 5 Crystal unit 7 frame 9 Upper case 11 Lower case 13 internal electrodes 15 Frame metal film 17 Upper joining member 19 Lower joining member 21 External electrode 23 Inside 25 Cylindrical crystal unit 27 lead wire 29 circuit board

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 水晶振動子と該水晶振動子を囲む枠部を
一体化した水晶振動子枠板と、第１の筐体と、第２の筐
体を備え、該水晶振動子枠板を該第１の筐体と該第２の
筐体で挟み込んで気密封止する水晶振動子構造体におい
て、前記枠部の上面と下面と側面のそれぞれの少なくと
も一部に枠部金属膜を設け、前記枠部の上面は、導電性
を有する上部接合部材を介して前記第１の筐体と接合さ
れるとともに、前記枠部の下面は、導電性を有する下部
接合部材を介して前記第２の筐体と接合され、前記水晶
振動子の一方の内部電極は、前記枠部金属膜と前記上部
接合部材と前記下部接合部材と前記第２の筐体の下面に
設けられた一方の外部電極に導通され、前記水晶振動子
の他方の内部電極は、前記枠部金属膜と前記第２の筐体
に設けられた貫通孔と前記第２の筐体の下面に設けられ
た他方の外部電極に導通されていることを特徴とする水
晶振動子構造体。1. A crystal resonator frame plate comprising a crystal resonator and a frame portion surrounding the crystal resonator, a first casing, and a second casing. In a crystal unit structure which is sandwiched between the first casing and the second casing and hermetically sealed, a frame metal film is provided on at least a part of each of an upper surface, a lower surface and a side surface of the frame, An upper surface of the frame portion is joined to the first casing via an upper joint member having conductivity, and a lower surface of the frame portion is joined to the second housing via a lower joint member having conductivity. One internal electrode of the crystal unit bonded to the housing is connected to the frame metal film, the upper bonding member, the lower bonding member, and one external electrode provided on the lower surface of the second housing. The other internal electrode of the crystal unit, which is made conductive, has a through hole provided in the frame metal film and the second casing. And a crystal resonator structure, which is electrically connected to the other external electrode provided on the lower surface of the second housing. 【請求項２】 水晶振動子と該水晶振動子を囲む枠部を
一体化した水晶振動子枠板と、第１の筐体と、第２の筐
体を備え、該水晶振動子枠板を該第１の筐体と該第２の
筐体で挟み込んで気密封止する水晶振動子構造体におい
て、前記枠部の下面の少なくとも一部に枠部金属膜を設
け、前記枠部の下面は、導電性を有する下部接合部材を
介して前記第２の筐体と接合され、前記水晶振動子の一
方の内部電極は、前記枠部金属膜と前記下部接合部材と
前記第２の筐体の下面に設けられた一方の外部電極に導
通され、前記水晶振動子の他方の内部電極は、前記枠部
金属膜と前記第２の筐体に設けられた貫通孔と前記第２
の筐体の下面に設けられた他方の外部電極に導通されて
いることを特徴とする水晶振動子構造体。2. A crystal unit, a crystal unit frame plate in which a crystal unit and a frame portion surrounding the crystal unit are integrated, a first case, and a second case. In a quartz resonator structure sandwiched between the first casing and the second casing and hermetically sealed, a frame metal film is provided on at least a part of the lower surface of the frame portion, and the lower surface of the frame portion is , The second casing is joined to the second casing via a conductive lower joining member, and one internal electrode of the crystal unit is formed of the frame metal film, the lower joining member, and the second casing. The other internal electrode of the crystal unit, which is electrically connected to one external electrode provided on the lower surface, has the frame metal film, the through hole provided in the second casing, and the second internal electrode.
A crystal resonator structure, wherein the crystal resonator structure is electrically connected to the other external electrode provided on the lower surface of the casing. 【請求項３】 前記一方の外部電極と前記他方の外部電
極は、それぞれ前記第２の筐体の長手方向の両端部に位
置することを特徴とする請求項１または請求項２に記載
の水晶振動子構造体。3. The crystal according to claim 1, wherein the one external electrode and the other external electrode are located at both ends in the longitudinal direction of the second casing, respectively. Oscillator structure.