JP2004040400A - Substrate for mounting piezoelectric vibrator - Google Patents

Substrate for mounting piezoelectric vibrator Download PDF

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JP2004040400A
JP2004040400A JP2002193751A JP2002193751A JP2004040400A JP 2004040400 A JP2004040400 A JP 2004040400A JP 2002193751 A JP2002193751 A JP 2002193751A JP 2002193751 A JP2002193751 A JP 2002193751A JP 2004040400 A JP2004040400 A JP 2004040400A
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piezoelectric vibrator
electrically connected
piezoelectric
vibrator
connection terminal
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JP2002193751A
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Japanese (ja)
Inventor
Makoto Hashimoto
橋元　誠
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Kyocera Corp
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Kyocera Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly versatile substrate for mounting a piezoelectric vibrator, capable of mounting different types of piezoelectric vibrators. <P>SOLUTION: Four terminals 2a, 2b, 2c, and 2d for connecting the piezoelectric vibrators are provided, corresponding to each corner part on the upper face of an insulation base 1, and at the same time, a pair of terminals 3a, 3b for outside connection are provided at both ends on the lower face of the insulation base 1. Among them, the terminal 2a for connecting the piezoelectric vibrator, provided corresponding to one corner part on one end side of the insulation base 1 and the terminal 2c for connecting the piezoelectric vibrator provided corresponding to the corner part in the same direction on the other end side, are electrically connected with each other. They are electrically connected to one terminal 3a for outside connection, and the terminal 2b for connecting the piezoelectric vibrator provided corresponding to the other corner part on one end side of the insulation base 1 and the terminal 2d provided corresponding to the corner part in the same direction on the other end side, are electrically connected each other, and they are electrically connected to the other terminal 3b for outside connection. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、圧電振動子を搭載するための圧電振動子搭載用基板に関するものである。
【０００２】
【従来の技術】
従来、圧電振動子は、水晶等の圧電材料から成る短冊状の振動子片の上下両面に一対の励振電極を設けるとともに該励振電極のそれぞれから前記振動子片の端部に延びる接続電極を設けて成り、通常、このような圧電振動子を搭載する圧電振動子搭載用基板と、この圧電振動子搭載用基板に搭載された圧電振動子を気密に封止するための蓋体とから成る圧電振動子収納用パッケージ内に気密に封止されて用いられる。
【０００３】
このような圧電振動子には、図９に斜視図で示すように、振動子片３１の上下面に設けた励振電極３２ａ、３２ｂから振動子片３１の一方の端部に接続電極３３ａ、３３ｂを延出させたタイプの圧電振動子３０と、図１０に斜視図で示すように、振動子片４１の上下面に設けた励振電極４２ａ、４２ｂから振動子片４１の両方の端部に接続電極４３ａ、４３ｂを別々に延出させたタイプの圧電振動子４０とがある。
【０００４】
そして、接続電極３３ａ、３３ｂを各励振電極３２ａ、３２ｂから振動子片３１の一方の端部に延出させたタイプの圧電振動子３０を収容する圧電振動子収納用パッケージに用いられる圧電振動子搭載用基板は、例えば図５に上面図で、図６に断面図で示すように、セラミック等の電気絶縁材料から成り、上面中央部に圧電振動子３０を搭載するための四角形状の凹部１１ａを有する略直方体状の絶縁基体１１と、この絶縁基体１１の凹部１１ａ内の上面における一端側の各角部に並設されており、圧電振動子３０の接続電極３３ａ、３３ｂが電気的に接続される一対の圧電振動子接続用端子１２ａ、１２ｂと、絶縁基体１１の下面の両端部に設けられており、圧電振動子接続用端子１２ａ、１２ｂに接続導体１４ａ、１４ｂを介して電気的に接続された外部接続用端子１３ａ、１３ｂとを備えている。そして、凹部１１ａ内に圧電振動子３０を搭載するとともに圧電振動子３０の各接続電極３３ａ、３３ｂを圧電振動子接続用端子１２ａ、１２ｂに導電性接着剤を介してそれぞれ接続固定した後、絶縁基体２１の上面に凹部１１ａを塞ぐようにして蓋体を接合させることにより、圧電振動子３０が気密に封止されるとともに圧電振動子３０の励振電極３２ａ、３２ｂと圧電振動子搭載用基板の外部接続用端子１３ａ、１３ｂとが電気的に接続された製品としての圧電振動装置となる。
【０００５】
他方、接続電極４３ａ、４３ｂを各励振電極４２ａ、４２ｂから振動子片４１の両方の端部に別々に延出させたタイプの圧電振動子４０を収容する圧電振動子収納用パッケージに用いられる圧電振動子搭載用基板は、例えば図７に上面図で、図８に断面図で示すように、セラミック等の電気絶縁材料から成り、上面中央部に圧電振動子４０を搭載するための凹部２１ａを有する略直方体状の絶縁基体２１と、この絶縁基体２１の凹部２１ａ内の上面における両端部に設けられており、圧電振動子４０の接続電極４３ａ、４３ｂが電気的に接続される一対の圧電振動子接続用端子２２ａ、２２ｂと、絶縁基体２１の下面の両端部に設けられており、圧電振動子接続用端子２２ａ、２２ｂに接続導体２４ａ、２４ｂを介して電気的に接続されている外部接続用電極２３ａ、２３ｂとを備えている。そして、凹部２１ａ内に圧電振動子４０を搭載するとともに圧電振動子４０の各接続電極４３ａ、４３ｂを圧電振動子接続用端子２２ａ、２２ｂに導電性接着剤を介して接続固定した後、絶縁基体２１の上面に凹部２１ａを塞ぐようにして蓋体を接合させることにより、圧電振動子４０が気密に封止されるとともに圧電振動子４０の励振電極４２ａ、４２ｂと圧電振動子搭載用基板の外部接続用端子２３ａ、２３ｂとが電気的に接続された製品としての圧電振動装置となる。
【０００６】
そして、これらの圧電振動装置は絶縁基体１１や２１の下面に被着させた外部接続用端子１３ａ、１３ｂや２３ａ、２３ｂを外部電気回路基板の配線導体に半田を介して接続させることにより、内部に収容する圧電振動子３０や４０の励振電極３２ａ、３２ｂや４２ａ、４２ｂが外部電気回路に電気的に接続されることとなる。
【０００７】
【発明が解決しようとする課題】
しかしながら、上述したような従来の圧電振動子搭載用基板によれば、搭載する圧電振動子が接続電極を振動子片の一方の端部に延出させたタイプと、接続電極を振動子片の両側の端部に別々に延出させたタイプとで、それぞれ圧電振動子接続用端子の配置が異なる二種類の圧電振動子搭載用基板を別々に準備する必要があり、圧電振動装置の製造が煩雑になってしまうという問題点を有していた。
【０００８】
本発明は、かかる従来の問題点に鑑み案出されたものであり、圧電振動子が接続電極を各励振電極から振動子片の一方の端部に延出させたタイプであっても、接続電極を各励振電極から振動子片の両方の端部に別々に延出させたタイプであっても、一種類の圧電振動子搭載用基板に搭載して圧電振動装置となすことが可能な汎用性の高い圧電振動子搭載用基板を提供することにある。
【０００９】
【課題を解決するための手段】
本発明の圧電振動子搭載用基板は、上面に圧電振動子が搭載される略直方体状の絶縁基体と、該絶縁基体の上面の一端側に、該一端側における前記上面の一方の角部に対応して位置するように設けられた第一の圧電振動子接続用端子および他方の角部に対応して位置するように設けられた第二の圧電振動子接続用端子と、前記絶縁基体の上面の他端側に、該他端側における前記上面の前記一方の角部と同じ側の角部に対応して位置するように設けられているとともに前記第一の圧電振動子接続用端子に電気的に接続された第三の圧電振動子接続用端子および前記他方の角部と同じ側の角部に対応して位置するように設けられているとともに前記第二の圧電振動子接続用端子に電気的に接続された第四の圧電振動子接続用端子と、前記絶縁基体の前記一端側下面に設けられており、前記第一および第三の圧電振動子接続用端子に電気的に接続された第一の外部接続用端子と、前記絶縁基体の前記他端側下面に設けられており、前記第二および第四の圧電振動子接続用端子に電気的に接続された第二の外部接続用端子とを具備することを特徴とするものである。
【００１０】
本発明の圧電振動子搭載用基板によれば、上述の構成としたことから、これに搭載する圧電振動子が接続電極を振動子片の一方の端部に延出させたタイプの場合であれば、その圧電振動子の接続電極を例えば第一および第二の圧電振動子接続用端子にそれぞれ接続させるように搭載することによって、他方、両方の端部に延出させたタイプの場合であれば、その圧電振動子の接続電極を例えば第一および第四の圧電振動子接続用端子にそれぞれ接続させるように搭載することにより、圧電振動子の各励振電極を絶縁基体の下面両端部に形成された一対の外部接続用端子に接続させた圧電振動装置とすることができる。
【００１１】
【発明の実施の形態】
次に本発明を添付の図面に基づき詳細に説明する。
【００１２】
図１は、本発明の圧電振動子搭載用基板の実施の形態の一例を示す上面図であり、図２はその断面図である。これらの図中において、１は絶縁基体、２ａ、２ｂ、２ｃ、２ｄは圧電振動子接続用端子、３ａおよび３ｂは外部接続用端子である。
【００１３】
絶縁基体１は、酸化アルミニウム質焼結体や窒化アルミニウム質焼結体、ムライト質焼結体、炭化珪素質焼結体、ガラス−セラミック等のセラミック材料から成る略直方体状であり、その上面中央部に圧電振動子を搭載するための略四角形状の凹部１ａが形成されており、凹部１ａ内には圧電振動子が搭載される。
【００１４】
このような絶縁基体１は、例えば酸化アルミニウム質焼結体から成る場合であれば、酸化アルミニウム、酸化珪素、酸化カルシウム、酸化マグネシウム等のセラミック原料粉末に適当な有機バインダー、溶剤、可塑剤、分散剤等を添加混合して泥漿状のセラミックスラリーとなすとともに、そのセラミックスラリーを従来周知のドクターブレード法を採用してシート状となすことにより複数枚のセラミックグリーンシートを得、次にそれらのセラミックグリーンシートに適当な打ち抜き加工を施すとともに、それらを上下に積層してセラミックグリーンシート積層体となし、最後にそのセラミックグリーンシート積層体を還元雰囲気中、約１６００℃の温度で焼成することによって製作される。
【００１５】
また、絶縁基体１はその凹部１ａ内の上面の各角部に四つの圧電振動子接続用端子２ａ、２ｂ、２ｃ、２ｄが被着形成されており、これらの圧電振動子接続用端子２ａ、２ｂ、２ｃ、２ｄには圧電振動子の接続電極が導電性接着剤を介して接続される。なお、これらの圧電振動子接続用端子２ａ、２ｂ、２ｃ、２ｄは、圧電振動子接続用端子２ａと２ｃとが絶縁基体１の内部に設けた接続導体４ａにより互いに電気的に接続されているとともに、圧電振動子接続用端子２ｂと２ｄとが絶縁基体１の内部に設けた接続導体４ｂにより互いに電気的に接続されている。
【００１６】
また、絶縁基体１の下面には、その両端部に一対の外部接続用端子３ａ、３ｂが被着形成されている。そして、これらの外部接続用端子３ａ、３ｂのうち、外部接続用端子３ａは絶縁基体１の内部および側面に設けた接続導体４ｃを介して圧電振動子接続用端子２ａに電気的に接続されており、外部接続用端子３ｂは絶縁基体１の内部および側面に設けた接続導体４ｄを介して圧電振動子接続用端子２ｄに電気的に接続されている。このように接続することによって、圧電振動子接続用端子２ａ、２ｃと外部接続用端子３ａとが、および圧電振動子接続用端子２ｂ、２ｄと外部接続用端子３ｂとがそれぞれ電気的に接続されることとなる。
そして、本発明の圧電振動子搭載用基板に圧電振動子を搭載した後、この外部接続用端子３ａ、３ｂを外部電気回路基板の配線導体に半田を介して接続することにより搭載する圧電振動子が外部電気回路に電気的に接続されることとなる。
【００１７】
なお、圧電振動子接続用端子２ａ、２ｂ、２ｃ、２ｄおよび外部接続用端子３ａ、３ｂおよび接続導体４ａ、４ｂ、４ｃ、４ｄは、タングステンやモリブデン、銅、銀等の金属粉末メタライズから成り、例えばタングステンメタライズから成る場合であれば、タングステン粉末に適当な有機バインダー、溶剤を添加混合して得たメタライズペーストを従来周知のスクリーン印刷法等の厚膜手法を採用することによって、絶縁基体１用のセラミックグリーンシートに所定パターンに印刷塗布しておき、それらを絶縁基体１用のセラミックグリーンシート積層体とともに焼成することによって絶縁基体１の所定位置に所定の形状に被着形成される。
【００１８】
そして、本発明においては、絶縁基体１の上面の各角部に対応して四つの圧電振動子接続用端子２ａ、２ｂ、２ｃ、２ｄが設けられているとともに絶縁基体１の下面の両端に一対の外部接続用端子３ａ、３ｂが設けられており、これらのうち、絶縁基体１の一端側の一方の角部に対応して設けた圧電振動子接続用端子２ａと他端側の同じ方の角部に対応して設けた圧電振動子接続用端子２ｃとが互いに電気的に接続されているとともに一方の外部接続用端子３ａに電気的に接続されており、絶縁基体１の一端側の他方の角部に対応して設けた圧電振動子接続用端子２ｂと他端側の同じ方の角部に対応して設けた圧電振動子接続用端子２ｄとが互いに電気的に接続されているとともに他方の外部接続用端子３ｂに電気的に接続されており、そのことが重要である。このように、絶縁基体１の上面の各角部に対応して四つの圧電振動子接続用端子２ａ、２ｂ、２ｃ、２ｄが設けられているとともに絶縁基体１の下面の両端に一対の外部接続用端子３ａ、３ｂが設けられており、これらのうち、絶縁基体１の一端側の一方の角部に対応して設けた圧電振動子接続用端子２ａと他端側の同じ方の角部に対応して設けた圧電振動子接続用端子２ｃとが互いに電気的に接続されているとともに一方の外部接続用端子３ａに電気的に接続されており、絶縁基体１の一端側の他方の角部に対応して設けた圧電振動子接続用端子２ｂと他端側の同じ方の角部に対応して設けた圧電振動子接続用端子２ｄとが互いに電気的に接続されているとともに他方の外部接続用端子３ｂに電気的に接続されていることから、例えば、例えば図９に示したように振動子片３１の一方の端部に接続電極３３ａ、３３ｂを延出させたタイプの圧電振動子３０を搭載する場合であれば、図３に上面図で示すように、圧電振動子３０の接続電極３３ａ、３３ｂが圧電振動子接続用端子２ａ、２ｂに電気的に接続されるようにして搭載した後、絶縁基体１の上面に図示しない蓋体を凹部１ａを覆うようにして接合させることによって、圧電振動装置となり、他方、図１０に示したように接続電極４３ａ、４３ｂを振動子片４１の両方の端部に別々に延出させるタイプの圧電振動子４０を搭載する場合であれば、図４に上面図で示すように、圧電振動子４０の接続電極４３ａ、４３ｂが圧電振動子接続用端子２ａ、２ｄに電気的に接続されるようにして搭載した後、絶縁基体１の上面に図示しない蓋体を凹部１ａを覆うようにして接合させることによって、圧電振動装置となる。そして、これらの圧電振動装置の外部接続用端子３ａ、３ｂを外部電気回路基板の配線導体に半田を介して接続することにより、内部に収容する圧電振動子３０や４０の励振電極３２ａ、３２ｂや４２ａ、４２ｂが外部電気回路に電気的に接続されることとなる。
【００１９】
このように、本発明の圧電振動子搭載用基板によれば、搭載される圧電振動子が接続電極を振動子片の一方の端部に延出させたタイプの圧電振動子であっても、接続電極を振動子片の両方の端部に延出させたタイプの圧電振動子であっても搭載することができる。
【００２０】
なお、本発明は上述の実施の形態の一例に限定されるものではなく、本発明の要旨を逸脱しない範囲であれば種々の変更は可能であることはいうまでもない。
【００２１】
【発明の効果】
本発明の圧電振動子搭載用基板によれば、上面に圧電振動子が搭載される略直方体状の絶縁基体の上面の一端側に、該一端側における前記上面の一方の角部に対応して位置するように設けられた第一の圧電振動子接続用端子および他方の角部に対応して位置するように設けられた第二の圧電振動子接続用端子と、前記絶縁基体の上面の他端側に、該他端側における前記上面の前記一方の角部と同じ側の角部に対応して位置するように設けられているとともに前記第一の圧電振動子接続用端子に電気的に接続された第三の圧電振動子接続用端子および前記他方の角部と同じ側の角部に対応して位置するように設けられているとともに前記第二の圧電振動子接続用端子に電気的に接続された第四の圧電振動子接続用端子と、前記絶縁基体の前記一端側下面に設けられており、前記第一および第三の圧電振動子接続用端子に電気的に接続された第一の外部接続用端子と、前記絶縁基体の前記他端側下面に設けられており、前記第二および第四の圧電振動子接続用端子に電気的に接続された第二の外部接続用端子とを具備することから、これに搭載する圧電振動子が接続電極を振動子片の一方の端部に延出させたタイプの場合であれば、その圧電振動子の接続電極を例えば第一および第二の圧電振動子接続用端子にそれぞれ接続させるように搭載することによって、他方、両方の端部に延出させたタイプの場合であれば、その圧電振動子の接続電極を例えば第一および第四の圧電振動子接続用端子にそれぞれ接続させるように搭載することにより、圧電振動子の各励振電極を絶縁基体の下面両端部に形成された一対の外部接続用端子に接続させた圧電振動装置とすることができる。したがって、汎用性に優れた圧電振動子搭載用基板を提供することができる。
【図面の簡単な説明】
【図１】本発明の圧電振動子搭載用基板の実施の形態の一例を示す上面図である。
【図２】図１に示す圧電振動子搭載用基板の断面図である。
【図３】図１および図２に示す圧電振動子搭載用基板に圧電振動子３０を搭載した例を示す上面図である。
【図４】図１および図２に示す圧電振動子搭載用基板に圧電振動子４０を搭載した例を示す上面図である。
【図５】従来の圧電振動子搭載用基板の一例を示す上面図である。
【図６】図５に示す圧電振動子搭載用基板の断面図である。
【図７】従来の圧電振動子搭載用基板の他の例を示す上面図である。
【図８】図７に示す圧電振動子搭載用基板の断面図である。
【図９】圧電振動子の一例を示す斜視図である。
【図１０】圧電振動子の別の例を示す断面図である。
【符号の説明】
１・・・・・・・・・・・・・絶縁基体
２ａ、２ｂ、２ｃ、２ｄ・・・圧電振動子接続用端子
３ａ、３ｂ・・・・・・・・・外部接続用端子[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a substrate for mounting a piezoelectric vibrator for mounting a piezoelectric vibrator.
[0002]
[Prior art]
Conventionally, a piezoelectric vibrator is provided with a pair of excitation electrodes on both upper and lower surfaces of a strip-shaped vibrator piece made of a piezoelectric material such as quartz and provided with connection electrodes extending from each of the excitation electrodes to an end of the vibrator piece. In general, a piezoelectric vibrator mounting substrate on which such a piezoelectric vibrator is mounted, and a lid for hermetically sealing the piezoelectric vibrator mounted on the piezoelectric vibrator mounting substrate are provided. It is used by being hermetically sealed in a package for housing a vibrator.
[0003]
As shown in a perspective view in FIG. 9, such a piezoelectric vibrator includes connection electrodes 33a, 33b from excitation electrodes 32a, 32b provided on the upper and lower surfaces of the vibrator piece 31 to one end of the vibrator piece 31, respectively. The piezoelectric vibrator 30 of the type in which is extended, and as shown in a perspective view in FIG. 10, the excitation electrodes 42 a and 42 b provided on the upper and lower surfaces of the vibrator piece 41 are connected to both ends of the vibrator piece 41. There is a type of piezoelectric vibrator 40 in which the electrodes 43a and 43b are separately extended.
[0004]
A piezoelectric vibrator used in a piezoelectric vibrator housing package for accommodating a piezoelectric vibrator 30 of a type in which the connection electrodes 33a and 33b are extended from the excitation electrodes 32a and 32b to one end of the vibrator piece 31. The mounting substrate is made of, for example, an electrically insulating material such as ceramic as shown in a top view in FIG. 5 and a cross-sectional view in FIG. 6, and has a rectangular recess 11a for mounting the piezoelectric vibrator 30 in the center of the upper surface. The insulating substrate 11 has a substantially rectangular parallelepiped shape, and is provided in parallel with each corner portion on one end side of the upper surface in the concave portion 11a of the insulating substrate 11 so that the connection electrodes 33a and 33b of the piezoelectric vibrator 30 are electrically connected. The pair of piezoelectric vibrator connection terminals 12a and 12b are provided at both ends of the lower surface of the insulating base 11, and are electrically connected to the piezoelectric vibrator connection terminals 12a and 12b via the connection conductors 14a and 14b. Connected external connection terminals 13a, and a 13b. Then, the piezoelectric vibrator 30 is mounted in the recess 11a, and the connection electrodes 33a, 33b of the piezoelectric vibrator 30 are connected and fixed to the piezoelectric vibrator connection terminals 12a, 12b via a conductive adhesive, respectively. By bonding the lid to the upper surface of the base 21 so as to cover the concave portion 11a, the piezoelectric vibrator 30 is hermetically sealed and the excitation electrodes 32a and 32b of the piezoelectric vibrator 30 and the substrate for mounting the piezoelectric vibrator are mounted. A piezoelectric vibration device as a product in which the external connection terminals 13a and 13b are electrically connected.
[0005]
On the other hand, a piezoelectric element used in a package for accommodating a piezoelectric vibrator for accommodating a piezoelectric vibrator 40 of a type in which connection electrodes 43a and 43b are separately extended from the excitation electrodes 42a and 42b to both ends of the vibrator piece 41, respectively. The vibrator mounting substrate is made of, for example, an electrically insulating material such as ceramic as shown in a top view in FIG. 7 and a cross-sectional view in FIG. 8, and has a concave portion 21a for mounting the piezoelectric vibrator 40 in the center of the upper surface. And a pair of piezoelectric vibrators provided at both ends of the upper surface inside the concave portion 21a of the insulating base 21 and electrically connected to the connection electrodes 43a and 43b of the piezoelectric vibrator 40. Terminals 22a and 22b for connecting the transducers are provided at both ends of the lower surface of the insulating base 21, and are electrically connected to the terminals 22a and 22b for connecting the piezoelectric vibrator via the connection conductors 24a and 24b. External connection electrode 23a, and a 23b. After mounting the piezoelectric vibrator 40 in the recess 21a and connecting and fixing the connection electrodes 43a and 43b of the piezoelectric vibrator 40 to the piezoelectric vibrator connection terminals 22a and 22b via a conductive adhesive, the insulating base The piezoelectric vibrator 40 is hermetically sealed by joining a lid to the upper surface of the piezoelectric vibrator 21 so as to cover the concave portion 21a, and the excitation electrodes 42a and 42b of the piezoelectric vibrator 40 and the outside of the piezoelectric vibrator mounting substrate. A piezoelectric vibration device as a product in which the connection terminals 23a and 23b are electrically connected.
[0006]
These piezoelectric vibrating devices are internally connected by connecting the external connection terminals 13a, 13b, 23a, and 23b attached to the lower surfaces of the insulating bases 11 and 21 to the wiring conductors of the external electric circuit board via solder. The excitation electrodes 32a, 32b, 42a, and 42b of the piezoelectric vibrators 30 and 40 housed in the piezoelectric element 30 are electrically connected to an external electric circuit.
[0007]
[Problems to be solved by the invention]
However, according to the conventional piezoelectric vibrator mounting board as described above, the piezoelectric vibrator to be mounted has a type in which the connection electrode extends to one end of the vibrator piece, and the connection electrode has the same shape as the vibrator piece. It is necessary to separately prepare two types of substrates for mounting the piezoelectric vibrator, which have different arrangements of the terminals for connecting the piezoelectric vibrators, depending on the type that is separately extended to both ends. There was a problem that it became complicated.
[0008]
The present invention has been devised in view of such a conventional problem, and even when the piezoelectric vibrator is of a type in which the connection electrodes extend from each excitation electrode to one end of the vibrator piece, the connection is made even if Even if the electrodes are separately extended from each excitation electrode to both ends of the vibrator piece, it can be used as a piezoelectric vibrator by mounting it on one type of piezoelectric vibrator mounting substrate It is an object of the present invention to provide a substrate for mounting a piezoelectric vibrator with high performance.
[0009]
[Means for Solving the Problems]
The substrate for mounting a piezoelectric vibrator of the present invention has a substantially rectangular parallelepiped insulating base on which the piezoelectric vibrator is mounted on the upper surface, and one end of the upper surface of the insulating base, and one corner of the upper surface at the one end. A first piezoelectric vibrator connection terminal provided correspondingly and a second piezoelectric vibrator connection terminal provided correspondingly to the other corner, The other end of the upper surface is provided so as to correspond to a corner on the same side as the one corner of the upper surface at the other end, and is connected to the first piezoelectric vibrator connection terminal. A third piezoelectric vibrator connection terminal electrically connected and the second piezoelectric vibrator connection terminal provided so as to correspond to a corner on the same side as the other corner; A fourth piezoelectric vibrator connection terminal electrically connected to the A first external connection terminal, which is provided on the lower surface on one end side and is electrically connected to the first and third piezoelectric vibrator connection terminals, is provided on the lower surface on the other end side of the insulating base. And a second external connection terminal electrically connected to the second and fourth piezoelectric vibrator connection terminals.
[0010]
According to the substrate for mounting a piezoelectric vibrator of the present invention, since the above-described configuration is adopted, the piezoelectric vibrator mounted on the substrate may be of a type in which a connection electrode extends to one end of a vibrator piece. For example, in the case of a type in which the connection electrodes of the piezoelectric vibrator are mounted so as to be connected to, for example, the first and second piezoelectric vibrator connection terminals, respectively, and on the other hand, extend to both ends. For example, by mounting the connection electrodes of the piezoelectric vibrator so as to be connected to, for example, the first and fourth piezoelectric vibrator connection terminals, the excitation electrodes of the piezoelectric vibrator are formed at both ends of the lower surface of the insulating base. The piezoelectric vibrating device can be connected to the pair of external connection terminals.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described in detail with reference to the accompanying drawings.
[0012]
FIG. 1 is a top view showing an example of an embodiment of a piezoelectric vibrator mounting substrate according to the present invention, and FIG. 2 is a sectional view thereof. In these figures, 1 is an insulating base, 2a, 2b, 2c, and 2d are piezoelectric vibrator connection terminals, and 3a and 3b are external connection terminals.
[0013]
The insulating substrate 1 is a substantially rectangular parallelepiped made of a ceramic material such as an aluminum oxide sintered body, an aluminum nitride sintered body, a mullite sintered body, a silicon carbide sintered body, and a glass-ceramic. A substantially rectangular concave portion 1a for mounting a piezoelectric vibrator is formed in the portion, and the piezoelectric vibrator is mounted in the concave portion 1a.
[0014]
When such an insulating substrate 1 is made of, for example, an aluminum oxide sintered body, an organic binder, a solvent, a plasticizer, and a dispersion suitable for ceramic raw material powders such as aluminum oxide, silicon oxide, calcium oxide, and magnesium oxide. The slurry is formed into a slurry-like ceramic slurry by adding an agent and the like, and the ceramic slurry is formed into a sheet by using a conventionally known doctor blade method to obtain a plurality of ceramic green sheets. The green sheet is subjected to appropriate punching, and is laminated on top and bottom to form a ceramic green sheet laminate. Finally, the ceramic green sheet laminate is fired in a reducing atmosphere at a temperature of about 1600 ° C. Is done.
[0015]
The insulating substrate 1 has four piezoelectric vibrator connection terminals 2a, 2b, 2c, and 2d attached to respective corners of the upper surface in the concave portion 1a, and these piezoelectric vibrator connection terminals 2a, The connection electrodes of the piezoelectric vibrators are connected to 2b, 2c, and 2d via a conductive adhesive. The piezoelectric vibrator connection terminals 2a, 2b, 2c, and 2d are electrically connected to each other by the connection conductor 4a provided inside the insulating base 1. At the same time, the piezoelectric vibrator connection terminals 2b and 2d are electrically connected to each other by a connection conductor 4b provided inside the insulating base 1.
[0016]
A pair of external connection terminals 3a and 3b are formed on the lower surface of the insulating base 1 at both ends thereof. Of these external connection terminals 3a and 3b, the external connection terminal 3a is electrically connected to the piezoelectric vibrator connection terminal 2a via the connection conductor 4c provided inside and on the side surface of the insulating base 1. The external connection terminal 3b is electrically connected to the piezoelectric vibrator connection terminal 2d via a connection conductor 4d provided inside and on the side surface of the insulating base 1. With such a connection, the piezoelectric vibrator connection terminals 2a and 2c and the external connection terminal 3a are electrically connected, and the piezoelectric vibrator connection terminals 2b and 2d and the external connection terminal 3b are electrically connected. The Rukoto.
Then, after mounting the piezoelectric vibrator on the piezoelectric vibrator mounting board of the present invention, the piezoelectric vibrator is mounted by connecting the external connection terminals 3a and 3b to the wiring conductors of the external electric circuit board via solder. Are electrically connected to an external electric circuit.
[0017]
Note that the piezoelectric vibrator connection terminals 2a, 2b, 2c, 2d and the external connection terminals 3a, 3b and the connection conductors 4a, 4b, 4c, 4d are made of metal powder metallization such as tungsten, molybdenum, copper, silver, etc. For example, in the case of tungsten metallization, a metallization paste obtained by adding and mixing an appropriate organic binder and a solvent to tungsten powder is applied to the insulating substrate 1 by employing a conventionally known thick film method such as a screen printing method. Are printed and applied in a predetermined pattern on the ceramic green sheet, and are fired together with the ceramic green sheet laminate for the insulating substrate 1 so as to be formed in a predetermined shape on the insulating substrate 1 at a predetermined position.
[0018]
In the present invention, four piezoelectric vibrator connection terminals 2 a, 2 b, 2 c, and 2 d are provided corresponding to each corner of the upper surface of the insulating substrate 1, and a pair of terminals are provided at both ends of the lower surface of the insulating substrate 1. The external connection terminals 3a and 3b are provided. Of these, the piezoelectric vibrator connection terminal 2a provided corresponding to one corner on one end side of the insulating base 1 and the same other end on the other end side are provided. The piezoelectric vibrator connection terminals 2c provided corresponding to the corners are electrically connected to each other and electrically connected to one of the external connection terminals 3a, and the other end on one end side of the insulating base 1. And the piezoelectric vibrator connection terminal 2b provided corresponding to the same corner on the other end is electrically connected to each other. It is electrically connected to the other external connection terminal 3b, Door is important. As described above, four piezoelectric vibrator connection terminals 2a, 2b, 2c, and 2d are provided corresponding to the respective corners on the upper surface of the insulating base 1, and a pair of external connection terminals are provided at both ends of the lower surface of the insulating base 1. Terminals 3a and 3b are provided. Of these, the piezoelectric vibrator connection terminal 2a provided corresponding to one corner on one end of the insulating base 1 and the same corner on the other end are provided. The corresponding piezoelectric vibrator connection terminals 2c are electrically connected to each other and electrically connected to one external connection terminal 3a, and the other corner of one end of the insulating base 1 is provided. And a piezoelectric vibrator connection terminal 2d provided corresponding to the same corner on the other end side are electrically connected to each other and the other external terminal. Because it is electrically connected to the connection terminal 3b, for example, For example, as shown in FIG. 9, when a piezoelectric vibrator 30 of a type in which connection electrodes 33a and 33b are extended at one end of a vibrator piece 31 is mounted, as shown in a top view in FIG. Then, after the connection electrodes 33a and 33b of the piezoelectric vibrator 30 are mounted so as to be electrically connected to the piezoelectric vibrator connection terminals 2a and 2b, a cover (not shown) is provided on the upper surface of the insulating base 1 with the concave portion 1a. A piezoelectric vibrating device is obtained by joining so as to cover the piezoelectric vibrating device. On the other hand, as shown in FIG. In the case of mounting, as shown in the top view in FIG. 4, the mounting is performed such that the connection electrodes 43a and 43b of the piezoelectric vibrator 40 are electrically connected to the piezoelectric vibrator connection terminals 2a and 2d. Later, illustrated on the upper surface of the insulating base 1 Without lid by bonding so as to cover the recess 1a, the piezoelectric vibrating device. Then, by connecting the external connection terminals 3a and 3b of these piezoelectric vibrating devices to the wiring conductors of the external electric circuit board via solder, the excitation electrodes 32a and 32b of the piezoelectric vibrators 30 and 40 housed inside are connected. 42a and 42b are electrically connected to an external electric circuit.
[0019]
Thus, according to the piezoelectric vibrator mounting substrate of the present invention, even if the mounted piezoelectric vibrator is a piezoelectric vibrator of a type in which the connection electrode extends to one end of the vibrator piece, A piezoelectric vibrator of the type in which the connection electrodes extend to both ends of the vibrator piece can be mounted.
[0020]
It is to be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention.
[0021]
【The invention's effect】
According to the piezoelectric vibrator mounting substrate of the present invention, one end of the upper surface of the substantially rectangular parallelepiped insulating base on which the piezoelectric vibrator is mounted on the upper surface corresponds to one corner of the upper surface at the one end. A first piezoelectric vibrator connection terminal provided so as to be located and a second piezoelectric vibrator connection terminal provided so as to be located corresponding to the other corner, and an upper surface of the insulating base. On the end side, the other end side is provided so as to correspond to a corner on the same side as the one corner of the upper surface, and is electrically connected to the first piezoelectric vibrator connection terminal. The third piezoelectric vibrator connection terminal connected to the second piezoelectric vibrator connection terminal is provided so as to correspond to a corner on the same side as the other corner and electrically connected to the second piezoelectric vibrator connection terminal. A fourth piezoelectric vibrator connection terminal connected to the A first external connection terminal that is provided on the side lower surface and is electrically connected to the first and third piezoelectric vibrator connection terminals; and a first external connection terminal that is provided on the other end lower surface of the insulating base. And a second external connection terminal electrically connected to the second and fourth piezoelectric vibrator connection terminals, so that the piezoelectric vibrator mounted on the second and fourth piezoelectric vibrator connection terminals connects the connection electrode to the vibrator piece. In the case of the type extended to one end of the piezoelectric vibrator, the connection electrodes of the piezoelectric vibrator are mounted so as to be connected to, for example, the first and second piezoelectric vibrator connection terminals, respectively. In the case of a type extending to both ends, the piezoelectric vibrator is mounted by connecting the connection electrodes of the piezoelectric vibrator to, for example, the first and fourth piezoelectric vibrator connection terminals, respectively. Connect each excitation electrode of the vibrator to the lower surface of the insulating base. It may be a piezoelectric vibrating device with connected to the pair of external connection terminals formed on the end portion. Therefore, it is possible to provide a piezoelectric vibrator mounting substrate excellent in versatility.
[Brief description of the drawings]
FIG. 1 is a top view illustrating an example of an embodiment of a substrate for mounting a piezoelectric vibrator according to the present invention.
FIG. 2 is a cross-sectional view of the piezoelectric vibrator mounting substrate shown in FIG.
3 is a top view showing an example in which a piezoelectric vibrator 30 is mounted on the piezoelectric vibrator mounting substrate shown in FIGS. 1 and 2. FIG.
4 is a top view showing an example in which a piezoelectric vibrator 40 is mounted on the piezoelectric vibrator mounting substrate shown in FIGS. 1 and 2. FIG.
FIG. 5 is a top view showing an example of a conventional piezoelectric vibrator mounting substrate.
6 is a cross-sectional view of the piezoelectric vibrator mounting substrate shown in FIG.
FIG. 7 is a top view showing another example of the conventional piezoelectric vibrator mounting substrate.
8 is a sectional view of the substrate for mounting a piezoelectric vibrator shown in FIG. 7;
FIG. 9 is a perspective view illustrating an example of a piezoelectric vibrator.
FIG. 10 is a sectional view showing another example of the piezoelectric vibrator.
[Explanation of symbols]
1 ... Insulating bases 2a, 2b, 2c, 2d ... Terminals 3a, 3b for connecting piezoelectric vibrators ... Terminals for external connection

Claims (1)

上面に圧電振動子が搭載される略直方体状の絶縁基体と、該絶縁基体の上面の一端側に、該一端側における前記上面の一方の角部に対応して位置するように設けられた第一の圧電振動子接続用端子および他方の角部に対応して位置するように設けられた第二の圧電振動子接続用端子と、前記絶縁基体の上面の他端側に、該他端側における前記上面の前記一方の角部と同じ側の角部に対応して位置するように設けられているとともに前記第一の圧電振動子接続用端子に電気的に接続された第三の圧電振動子接続用端子および前記他方の角部と同じ側の角部に対応して位置するように設けられているとともに前記第二の圧電振動子接続用端子に電気的に接続された第四の圧電振動子接続用端子と、前記絶縁基体の前記一端側下面に設けられており、前記第一および第三の圧電振動子接続用端子に電気的に接続された第一の外部接続用端子と、前記絶縁基体の前記他端側下面に設けられており、前記第二および第四の圧電振動子接続用端子に電気的に接続された第二の外部接続用端子とを具備することを特徴とする圧電振動子搭載用基板。A substantially rectangular parallelepiped insulating base on which the piezoelectric vibrator is mounted on the upper surface; One piezoelectric vibrator connection terminal and a second piezoelectric vibrator connection terminal provided so as to correspond to the other corner, and the other end of the upper surface of the insulating base, A third piezoelectric vibrator provided so as to correspond to a corner on the same side as the one corner of the upper surface and electrically connected to the first piezoelectric vibrator connection terminal A fourth piezoelectric vibrator provided so as to correspond to a corner portion on the same side as the other connecting portion and the other corner portion, and electrically connected to the second piezoelectric vibrator connecting terminal; A vibrator connection terminal and a lower surface on the one end side of the insulating base; A first external connection terminal electrically connected to the first and third piezoelectric vibrator connection terminals, and a first external connection terminal provided on the lower surface on the other end side of the insulating base; And a second external connection terminal electrically connected to the piezoelectric vibrator connection terminal.
JP2002193751A 2002-07-02 2002-07-02 Substrate for mounting piezoelectric vibrator Pending JP2004040400A (en)

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Cited By (7)

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JP2005260600A (en) * 2004-03-11 2005-09-22 Nippon Dempa Kogyo Co Ltd Crystal oscillator for surface mounting
JPWO2005109638A1 (en) * 2004-05-12 2008-03-21 株式会社大真空 Package for piezoelectric vibration element and piezoelectric vibrator
WO2009122704A1 (en) * 2008-03-31 2009-10-08 株式会社村田製作所 Piezoelectric vibrating part
JP2011139338A (en) * 2009-12-28 2011-07-14 Daishinku Corp Base for electronic component package, and the electronic component package
JP2015029181A (en) * 2013-07-30 2015-02-12 京セラクリスタルデバイス株式会社 Crystal device
JP2015142214A (en) * 2014-01-28 2015-08-03 京セラクリスタルデバイス株式会社 crystal device
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JP2005260600A (en) * 2004-03-11 2005-09-22 Nippon Dempa Kogyo Co Ltd Crystal oscillator for surface mounting
JP4636018B2 (en) * 2004-05-12 2011-02-23 株式会社大真空 Package for piezoelectric vibration element and piezoelectric vibrator
JPWO2005109638A1 (en) * 2004-05-12 2008-03-21 株式会社大真空 Package for piezoelectric vibration element and piezoelectric vibrator
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JPWO2009122704A1 (en) * 2008-03-31 2011-07-28 株式会社村田製作所 Piezoelectric vibration parts
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US8247953B2 (en) 2008-03-31 2012-08-21 Murata Manufacturing Co., Ltd. Piezoelectric oscillator part
CN102160285B (en) * 2008-03-31 2014-04-30 株式会社村田制作所 Piezoelectric vibrating part
JP2011139338A (en) * 2009-12-28 2011-07-14 Daishinku Corp Base for electronic component package, and the electronic component package
JP2015029181A (en) * 2013-07-30 2015-02-12 京セラクリスタルデバイス株式会社 Crystal device
JP2015142214A (en) * 2014-01-28 2015-08-03 京セラクリスタルデバイス株式会社 crystal device
CN108141197A (en) * 2015-12-21 2018-06-08 株式会社村田制作所 Harmonic oscillator and resonance device
CN108141197B (en) * 2015-12-21 2021-07-16 株式会社村田制作所 Harmonic oscillator and resonance device

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