JP4162384B2 - Crystal oscillator - Google Patents

Crystal oscillator Download PDF

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Publication number
JP4162384B2
JP4162384B2 JP2001018639A JP2001018639A JP4162384B2 JP 4162384 B2 JP4162384 B2 JP 4162384B2 JP 2001018639 A JP2001018639 A JP 2001018639A JP 2001018639 A JP2001018639 A JP 2001018639A JP 4162384 B2 JP4162384 B2 JP 4162384B2
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JP
Japan
Prior art keywords
resin
electrode
disposed
lead wire
terminal
Prior art date
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Expired - Lifetime
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JP2001018639A
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Japanese (ja)
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JP2001244774A (en
Inventor
政良 白石
雄起 星
茂夫 高城
徹 五十嵐
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Seiko Instruments Inc
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Seiko Instruments Inc
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Priority to JP2001018639A priority Critical patent/JP4162384B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、携帯電話及びコンピューターなどの情報機器に用いる水晶振動子に関する。
【0002】
【従来の技術】
従来のリードフレームを有する電子部品においては、図7に示す様に、樹脂40の垂直方向の中央部にリードフレーム500を配置し、リードフレームの端部を曲げて電極端子510を部品の外側に配置している。
【0003】
【発明が解決しようとする課題】
従来の電子部品にあっては、リードフレームの曲げ加工は、モールド樹脂の封止後に行う。そのためリード端子を作成するために、モールド樹脂の外側でクランプし、モールド樹脂の表面から離間してリード端子を形成する必要があり、モールド樹脂の幅よりもリード端子の外側の幅が大きくなり、小型化ができない、という問題点があった。
【0004】
さらに、リード端子の先端も基板と接触するために電子部品の外側に曲げ加工を行う必要があり、リード端子の先端部と先端部の幅は、モールド樹脂の幅より大きくなる欠点があった。
【0005】
図8は従来の電子部品の側面図であり、リードフレーム500が射出成形により、上下に樹脂40が配置されており、リードフレーム500の先端を折り曲げ電極端子510と、電極端子の先端部520と530の間隔が樹脂40の幅より大きくなっている。
【0006】
【課題を解決するための手段】
本発明は、内部に振動片を有し軸方向を水平に配置した缶と、前記缶の一端に配置され前記振動片に接続されたリード線と、前記リード線に接続された電極端子と、前記缶と前記リード線と前記電極端子を覆う樹脂からなり、前記電極端子が前記リード線と接続された上面電極と、前記上面電極と一体形成された下面電極の裏面を、前記樹脂の前記リード線側の底面の角に有する水晶振動子を形成することにより、缶とほぼ同じ幅と高さの小型水晶振動子を得ることができ、水晶振動子の小型化の妨げとなるリードフレームの面積の増加を最小にすることができ、小型で薄型の水晶振動子を得ることができる。
【0007】
また本発明では、リードフレームを抜き加工し、曲げ加工し電極端子形成する工程と、前記電極端子に振動片に接続されたリード線を接合する工程と、前記電極端子の上面を樹脂でモールドする工程と、前記電極端子を切断する工程により、1つのリードフレーム上に複数の水晶振動子を同時に形成することができる。
【0008】
【発明の実施の形態】
本発明の装置では、水晶振動子のモールド樹脂の底部にリードフレームから形成された電極端子を設け、さらに電極端子は屈曲部を介して、振動子に接続されたリード線と接続する。そして全体を樹脂によるモールド成形を行う。
【0009】
上記のように構成された水晶振動子はリードフレームの底面が振動子の底面となり、振動片との接続が樹脂内部のリードフレームの屈曲により行われるため電極端子の引き回しを最小にすることができる。
【0010】
また本発明では、振動片を有する缶のリード線を有する面と反対の面に間隔をおいて端子を設け、端子の底面を水晶振動子の底部に配置した。この端子に水晶振動子の実装時に、電極端子と合わせて基板とはんだで接続することができ、その結果基板にたいして水晶振動子を強固に表面実装することができる。
【0011】
【実施例】
以下、実施例について図面を参照に説明する
図1は本願発明の水晶振動子の実施例の断面図であり、図1において、水晶振動子は缶10と電極端子100と樹脂40から構成される。ここで、内部にVTカットの振動子片を有するチューブ型の缶10の軸方向を水平にして配置した。
【0012】
また、缶10の一端に配置され心材のコバーをハンダによりメッキしたリード線20に、リードフレームを屈曲して形成した電極端子100を接続している。ここで、電極端子100は、それぞれ一体に形成された水晶振動子の下面の下面電極120と、リード線20に接続する上面電極110からなる。
【0013】
そして、缶10のリード線20がある面と反対の面の近傍の、水晶振動子下面に頭部の端子50が配置される。
【0014】
缶10の頭部の上部には射出成形時の位置決めピンが挿入される穴80があり、同じく缶10の頭部の下部にも位置決めピンが挿入される穴70がある。ここで、射出成形時に樹脂が挿入される下部電極と缶の間に、ジャンクション60が形成される
【0015】
図2は本願発明の水晶振動子の下面を示す図であり、図1のリード線側に、一方のリード線と接続される第1の電極端子140が右上方の角に形成されており、他方のリード線と接続される第2の電極端子150が右下方の角に形成されている。そして、第1の電極端子140と第2の電極端子150がある端面より内側にジャンクション60を穴がある。
【0016】
さらに、リード線と反対側の、図2の左側に頭部の端子50があり、端子50がある端面の内側に位置決めピン挿入のための穴70がある。
【0017】
図3は本願発明の水晶振動子の側面図であり、樹脂40の底部の左端に端子50と右端に第2の電極端子150がある。
【0018】
次に、本発明の実施例の製造方法について述べる。図4に示す水晶振動子の製造工程において、リン青銅からなるリードフレーム300の上に缶10を配置し、リード線20と上面電極110を溶接する。さらにこの工程の側面図を図5に示す。打ち抜き加工により所定の形状に成形したリードフレーム300の上面に曲げ加工により、上面電極110と端子50と垂直部320を形成し、上面電極110とリード線20を溶接する。
【0019】
図6は、図4の工程の1個の水晶振動子を拡大したもので、リードフレーム300の一部に下部電極120と、下部電極120に一体成形された上部電極110と上部電極に接続されたリード線20からなる。また、端子50の缶10の頭部に向かいあう部分を折り曲げ垂直部52を形成し、缶10の頭部と一定の間隔を持って配置する。最後に点線で囲むように金型で覆い、液晶ポリマーを射出成形する。最後に点線の範囲でリードフレーム300を切断し電極形状を得る。
【0020】
本願発明の他の実施例として、水晶振動子の代わりに、PLZTやPZTなどを用いた圧電振動子、コンデンサ、抵抗などの電子部品を使用した実装部品にも適応可能である。
【0021】
【発明の効果】
本発明は、以上説明したような形態で実施され、以下に記載されるような効果を奏する。
【0022】
モールド樹脂の底部に電極端子を設け、樹脂内部に屈曲部を設けることにより、振動子のリードを曲げずに電極端子と振動子の接続ができるので、小型で振動子の周囲の缶とほぼ同じ大きさの水晶振動子ができる。
【0023】
そして、リードフレームを曲げ加工し、振動子を有する缶を接続した後、モールド成形し、電極端子部を接続することができ、1つのリードフレームから小型の水晶振動子を複数同時に製造することができる。
【図面の簡単な説明】
【図1】本発明の水晶振動子の断面図である。
【図2】本発明の水晶振動子の下面図である。
【図3】本発明の水晶振動子の側面図である。
【図4】本発明の実施例を示す上面図である。
【図5】本発明の実施例を示す側面図である。
【図6】本発明の実施例を示す上面図である。
【図7】従来の水晶振動子の側面図である。
【図8】従来の水晶振動子の側面図である。
【符号の説明】
10 缶
20 リード線
40 樹脂
50 端子
60 ジャンクション
70、80 穴
100 電極端子
110 上面電極
120 下面電極
140 第1の電極端子
150 第2の電極端子
300 リードフレーム
310 金型部
320 垂直部
500 リードフレーム
510 電極端子
520、530 先端部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crystal resonator used in information equipment such as a mobile phone and a computer.
[0002]
[Prior art]
In an electronic component having a conventional lead frame, as shown in FIG. 7, a lead frame 500 is disposed at the center in the vertical direction of the resin 40, and the end of the lead frame is bent to bring the electrode terminal 510 to the outside of the component. It is arranged.
[0003]
[Problems to be solved by the invention]
In a conventional electronic component, the lead frame is bent after the molding resin is sealed. Therefore, in order to create a lead terminal, it is necessary to clamp the outside of the mold resin and form the lead terminal away from the surface of the mold resin, and the width of the outside of the lead terminal becomes larger than the width of the mold resin, There was a problem that miniaturization was impossible.
[0004]
Further, since the tip of the lead terminal is also in contact with the substrate, it is necessary to bend the outside of the electronic component, and the width of the lead terminal and the tip of the lead terminal is larger than that of the mold resin.
[0005]
FIG. 8 is a side view of a conventional electronic component. The lead frame 500 is formed by injection molding so that the resin 40 is arranged vertically. The lead frame 500 is bent at the tip, an electrode terminal 510, and the tip 520 of the electrode terminal. The interval 530 is larger than the width of the resin 40.
[0006]
[Means for Solving the Problems]
The present invention includes a can having a vibration piece therein and horizontally arranged in the axial direction, a lead wire disposed at one end of the can and connected to the vibration piece, an electrode terminal connected to the lead wire, The lead of the resin is formed of a resin that covers the can, the lead wire, and the electrode terminal, and the back surface of the lower surface electrode that is integrally formed with the upper surface electrode, the electrode terminal being connected to the lead wire. By forming a crystal unit at the corner of the bottom on the wire side, a small crystal unit with the same width and height as the can can be obtained, and the lead frame area that hinders miniaturization of the crystal unit Can be minimized, and a small and thin crystal resonator can be obtained.
[0007]
In the present invention, the lead frame is punched and bent to form an electrode terminal, the lead wire connected to the vibrating piece is joined to the electrode terminal, and the upper surface of the electrode terminal is molded with resin. A plurality of crystal resonators can be simultaneously formed on one lead frame by the step and the step of cutting the electrode terminal.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the apparatus of the present invention, an electrode terminal formed from a lead frame is provided at the bottom of the mold resin of the crystal resonator, and the electrode terminal is connected to a lead wire connected to the resonator via a bent portion. Then, the whole is molded by resin.
[0009]
In the crystal resonator configured as described above, the bottom surface of the lead frame becomes the bottom surface of the resonator, and the connection to the resonator element is performed by bending the lead frame inside the resin, so that the electrode terminal can be minimized. .
[0010]
In the present invention, the terminal is provided on the surface opposite to the surface having the lead wire of the can having the resonator element, and the bottom surface of the terminal is disposed at the bottom of the crystal unit. When the crystal unit is mounted on this terminal, it can be connected to the substrate together with the electrode terminal by soldering. As a result, the crystal unit can be firmly surface-mounted on the substrate.
[0011]
【Example】
1 is a cross-sectional view of an embodiment of a crystal resonator according to the present invention. In FIG. 1, the crystal resonator includes a can 10, an electrode terminal 100, and a resin 40. . Here, the axial direction of the tube-type can 10 having the VT-cut vibrator piece inside is arranged horizontally.
[0012]
In addition, an electrode terminal 100 formed by bending a lead frame is connected to a lead wire 20 disposed at one end of the can 10 and plated with a core of a cover of core material by solder. Here, the electrode terminal 100 includes a lower surface electrode 120 on the lower surface of the crystal unit formed integrally and an upper surface electrode 110 connected to the lead wire 20.
[0013]
And the terminal 50 of the head is arrange | positioned in the crystal oscillator lower surface near the surface on the opposite side to the surface with the lead wire 20 of the can 10.
[0014]
There is a hole 80 for inserting a positioning pin at the time of injection molding in the upper part of the head of the can 10, and there is also a hole 70 for inserting a positioning pin in the lower part of the head of the can 10. Here, a junction 60 is formed between the lower electrode into which the resin is inserted during injection molding and the can .
[0015]
FIG. 2 is a view showing the lower surface of the crystal resonator according to the present invention. On the lead wire side of FIG. 1, a first electrode terminal 140 connected to one lead wire is formed at the upper right corner, A second electrode terminal 150 connected to the other lead wire is formed at the lower right corner. And the junction 60 has a hole inside the end face where the first electrode terminal 140 and the second electrode terminal 150 are located.
[0016]
Further, a terminal 50 on the head is provided on the left side of FIG. 2 on the opposite side of the lead wire, and a hole 70 for inserting a positioning pin is provided on the inner side of the end face where the terminal 50 is located.
[0017]
FIG. 3 is a side view of the crystal resonator according to the present invention. The resin 40 has a terminal 50 at the left end of the bottom and a second electrode terminal 150 at the right end.
[0018]
Next, the manufacturing method of the Example of this invention is described. 4, the can 10 is placed on a lead frame 300 made of phosphor bronze, and the lead wire 20 and the upper surface electrode 110 are welded. Further, a side view of this step is shown in FIG. The upper surface electrode 110, the terminal 50, and the vertical portion 320 are formed by bending on the upper surface of the lead frame 300 formed into a predetermined shape by punching, and the upper surface electrode 110 and the lead wire 20 are welded.
[0019]
FIG. 6 is an enlarged view of one crystal resonator in the process of FIG. 4, and is connected to the lower electrode 120, the upper electrode 110 integrally formed with the lower electrode 120, and the upper electrode on a part of the lead frame 300. Lead wire 20. Further, a portion of the terminal 50 facing the head of the can 10 is bent to form a vertical portion 52, and the terminal 50 is disposed with a certain distance from the head of the can 10. Finally, it is covered with a mold so as to be surrounded by a dotted line, and a liquid crystal polymer is injection molded. Finally, the lead frame 300 is cut within a dotted line range to obtain an electrode shape.
[0020]
As another embodiment of the present invention, the present invention can be applied to mounting parts using electronic parts such as piezoelectric vibrators, capacitors, resistors, etc. using PLZT, PZT, etc., instead of quartz vibrators.
[0021]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0022]
By providing an electrode terminal at the bottom of the mold resin and a bent part inside the resin, the electrode terminal and the vibrator can be connected without bending the vibrator lead, so it is small and almost the same as the can around the vibrator A crystal resonator of a size can be made.
[0023]
Then, after bending the lead frame and connecting the can having the vibrator, it can be molded and connected to the electrode terminal portion, and a plurality of small crystal vibrators can be manufactured simultaneously from one lead frame. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a crystal resonator according to the present invention.
FIG. 2 is a bottom view of the crystal resonator of the present invention.
FIG. 3 is a side view of the crystal resonator according to the present invention.
FIG. 4 is a top view showing an embodiment of the present invention.
FIG. 5 is a side view showing an embodiment of the present invention.
FIG. 6 is a top view showing an embodiment of the present invention.
FIG. 7 is a side view of a conventional crystal resonator.
FIG. 8 is a side view of a conventional crystal resonator.
[Explanation of symbols]
10 Can 20 Lead wire 40 Resin 50 Terminal 60 Junction 70, 80 Hole 100 Electrode terminal 110 Upper surface electrode 120 Lower surface electrode 140 First electrode terminal 150 Second electrode terminal 300 Lead frame 310 Mold portion 320 Vertical portion 500 Lead frame 510 Electrode terminals 520, 530 Tip

Claims (2)

内部に振動片を有し軸方向を水平に配置した缶と、
前記缶の一端に配置され前記振動片に接続されたリード線と、
前記リード線に接続された電極端子と、
前記缶と前記リード線と前記電極端子を覆う樹脂からなる水晶振動子であって、
前記電極端子が前記リード線と接続された上面電極と、屈曲部を介して前記上面電極と一体形成され、前記軸方向かつ前記上面電極の端部の向きとは逆の方向に向かって端部が配置され、前記樹脂の底部に設けられた下面電極を有し、
前記樹脂の底部上に、前記缶の底部が配置され
前記下面電極の裏面が前記樹脂の底部の角に配置され、
一対の前記下面電極が前記樹脂の前記リード線側に形成され、一方の前記下面電極の裏面が前記樹脂の底部の一方の角に配置され、他方の前記下面電極の裏面が前記樹脂の底部の他方の角に配置され、
前記リード線側と反対側に一端が前記樹脂の底面に配置され、他端が前記一端と略垂直かつ前記缶と離間して配置された端子を有し、
前記樹脂の底部及び上部のうち、前記缶の頭部が配置されている箇所に、前記樹脂の射出成形時に位置決めピンを挿入するための穴を有し、
前記樹脂の底部のうち、前記下面電極と前記缶の間に設けられたジャンクションを有する水晶振動子。
A can having a resonator element inside and horizontally arranged in the axial direction;
A lead wire disposed at one end of the can and connected to the resonator element;
An electrode terminal connected to the lead wire;
A quartz resonator made of a resin covering the can, the lead wire and the electrode terminal,
The electrode terminal is formed integrally with the upper surface electrode via a bent portion with the upper surface electrode connected to the lead wire, and ends in the direction opposite to the axial direction and the direction of the end of the upper surface electrode Is disposed and has a lower surface electrode provided on the bottom of the resin,
The bottom of the can is disposed on the bottom of the resin ,
The back surface of the bottom electrode is disposed at the corner of the bottom of the resin;
The pair of lower surface electrodes are formed on the lead wire side of the resin, the back surface of one of the lower surface electrodes is disposed at one corner of the bottom portion of the resin, and the back surface of the other lower surface electrode is disposed on the bottom portion of the resin. Placed on the other corner,
One end is disposed on the bottom surface of the resin on the side opposite to the lead wire side, and the other end has a terminal disposed substantially perpendicular to the one end and spaced from the can,
Of the bottom and top of the resin, at the location where the head of the can is disposed, there is a hole for inserting a positioning pin during the injection molding of the resin,
A crystal resonator having a junction provided between the bottom electrode and the can in the bottom of the resin .
内部に振動片を有し軸方向を水平に配置した缶と、
前記缶の一端に配置され前記振動片に接続されたリード線と、
前記リード線に接続された電極端子と、
前記缶と前記リード線と前記電極端子を覆う樹脂からなる水晶振動子であって、
前記電極端子が前記リード線と接続された上面電極と、屈曲部を介して前記上面電極と一体形成され、前記軸方向かつ前記上面電極の端部の向きとは逆の方向に向かって端部が配置され、前記樹脂の底部に設けられた下面電極を有し、
前記樹脂の底部上に、前記缶の底部が配置され
前記電極端子が、前記上面電極と前記下面電極の間に屈曲部を有し、前記屈曲部の一端側から前記上面電極が前記屈曲部と略垂直に延設され、他端側から前記上面電極と反対の方向に前記下面電極が前記屈曲部と略垂直に延設され、
前記リード線側と反対側に一端が前記樹脂の底面に配置され、他端が前記一端と略垂直かつ前記缶と離間して配置された端子を有し、
前記樹脂の底部及び上部のうち、前記缶の頭部が配置されている箇所に、前記樹脂の射出成形時に位置決めピンを挿入するための穴を有し、
前記樹脂の底部のうち、前記下面電極と前記缶の間に設けられたジャンクションを有する水晶振動子。
A can having a resonator element inside and horizontally arranged in the axial direction;
A lead wire disposed at one end of the can and connected to the resonator element;
An electrode terminal connected to the lead wire;
A quartz resonator made of a resin covering the can, the lead wire and the electrode terminal,
The electrode terminal is formed integrally with the upper surface electrode via a bent portion with the upper surface electrode connected to the lead wire, and ends in the direction opposite to the axial direction and the direction of the end of the upper surface electrode Is disposed and has a lower surface electrode provided on the bottom of the resin,
The bottom of the can is disposed on the bottom of the resin ,
The electrode terminal has a bent portion between the upper surface electrode and the lower surface electrode, the upper surface electrode extends substantially perpendicularly to the bent portion from one end side of the bent portion, and the upper surface electrode from the other end side. The bottom electrode extends substantially perpendicular to the bent portion in the opposite direction,
One end is disposed on the bottom surface of the resin on the side opposite to the lead wire side, and the other end has a terminal disposed substantially perpendicular to the one end and spaced from the can,
Of the bottom and top of the resin, at the location where the head of the can is disposed, there is a hole for inserting a positioning pin during the injection molding of the resin,
A crystal resonator having a junction provided between the bottom electrode and the can in the bottom of the resin .
JP2001018639A 2001-01-26 2001-01-26 Crystal oscillator Expired - Lifetime JP4162384B2 (en)

Priority Applications (1)

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