JP4720038B2 - Non-reciprocal circuit element measurement device - Google Patents

Non-reciprocal circuit element measurement device Download PDF

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JP4720038B2
JP4720038B2 JP2001218708A JP2001218708A JP4720038B2 JP 4720038 B2 JP4720038 B2 JP 4720038B2 JP 2001218708 A JP2001218708 A JP 2001218708A JP 2001218708 A JP2001218708 A JP 2001218708A JP 4720038 B2 JP4720038 B2 JP 4720038B2
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Prior art keywords
circuit board
measurement
circuit element
nonreciprocal
isolator
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JP2003035736A (en
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陸宏 常門
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、例えばマイクロ波帯で使用されるアイソレータやサーキュレータ等の非可逆回路素子の測定装置に関する。
【0002】
【従来の技術】
従来より、携帯電話等の移動用の通信装置に採用される表面実装型アイソレータの電気特性を測定する測定装置が知られている。この測定装置は、アイソレータ本体から導出している表面実装用外部端子を測定用回路基板に設けた電極パターンに押し当てた状態で、アイソレータの電気特性を測定する。このとき、従来の測定装置は、アイソレータ本体を押さえ棒で上から押して、外部端子を測定用回路基板に押し当てていた。
【0003】
【発明が解決しようとする課題】
しかしながら、アイソレータ本体を押さえ棒で上から押す場合には、アイソレータ内部にオープン不良(内部部品同士の電気的接続不良)が発生していても、押さえられたときの力でオープン箇所が接触して導通してしまい、オープン不良を検出できないことがある。また、押さえられたときの力が内部部品にかかるため、この押圧力が強過ぎると、内部部品である永久磁石やフェライトにクラック等が入る等の問題が生じる。あるいは、押圧力が強過ぎると、内部部品同士の電気的接続が破壊されたり、外部端子が変形する等の問題があった。
【0004】
そこで、本発明の目的は、非可逆回路素子に損傷を与えることなく、正確に電気特性を測定することが可能な非可逆回路素子の測定装置を提供することにある。
【0005】
【課題を解決するための手段及び作用】
前記目的を達成するため、本発明に係る非可逆回路素子の測定装置は、表面実装型の非可逆回路素子を測定用回路基板の表面に載置し、非可逆回路素子本体から導出している外部端子を測定用回路基板に圧接して電気特性を測定する非可逆回路素子の測定装置であって、前記測定用回路基板の非可逆回路素子載置エリア内に穴が設けられ、該穴を覆うように、前記測定用回路基板の裏面に吸引用パッドが配設されており、さらに、前記測定用回路基板に設けた穴の周囲部に、前記測定用回路基板と前記非可逆回路素子との隙間からのエアー漏れを防止するための密閉部材が設けられていること、又は、前記測定用回路基板の表面の所定の位置に導電性ゴム材を配設し、前記測定用回路基板が前記導電性ゴム材を介して前記非可逆回路素子の外部端子と電気的に接続していることを特徴とする。あるいは、前記穴内に吸引用パッドが配設されており、前記吸引用パッドがジャバラ構造であることを特徴とする。
【0006】
吸引用パッドにてエアーを吸引することにより、非可逆回路素子は測定用回路基板側に吸引され、非可逆回路素子の外部端子が測定用回路基板に圧接し、電気測定が可能となる。さらに、測定用回路基板に設けた穴の周囲部に、測定用回路基板と非可逆回路素子との隙間からのエアー漏れを防止するための密閉部材を設けることにより、非可逆回路素子が確実に測定用回路基板側に吸引される。
【0007】
また、吸引用パッドをジャバラ構造にすることにより、吸引の際に、ジャバラ構造の吸引用パッドが一時的に縮み、吸引用パッドに吸着した非可逆回路素子が測定用回路基板側により一層引き寄せられる。従って、非可逆回路素子の外部端子が測定用回路基板に確実に圧接する。
【0008】
【発明の実施の形態】
以下に、本発明に係る非可逆回路素子の測定装置の実施の形態について添付の図面を参照して説明する。なお、各実施形態において、同一部品及び同一部分には同じ符号を付し、重複した説明は省略する。
【0009】
[第1実施形態、図1〜図5]
図1に示すように、測定装置1は、概略、測定用回路基板10と、気密シート14と、吸引用パッド21と、金属ベース30と、入出力用同軸コネクタ33,34等で構成されている。
【0010】
測定用回路基板10は、例えば誘電体材料からなり、後述の非可逆回路素子(アイソレータ)の外部端子の位置に合わせて、上面には入力電極11、出力電極12及びアース電極13(図5参照)が形成されている。測定用回路基板10の中央部(言い換えると、非可逆回路素子載置エリア内)には、穴10aが設けられている。穴10aの径は、吸引用パッド21の吸引口の径より小さく設定されている。
【0011】
さらに、この穴10aの周囲部に気密シート14が配設されている。気密シート14は、非可逆回路素子の電気特性測定時に、測定用回路基板10と非可逆回路素子の底面との間に形成される隙間からのエアー漏れを防止するためのものである。気密シート14の材質としては、気密性に優れ、かつ、柔軟性及び絶縁性があるものが採用され、例えば、ゴム、フッ素樹脂、ポリイミド等がある。
【0012】
入力電極11及び出力電極12は、測定用回路基板10の左右に取り付けられた入出力用同軸コネクタ33,34に電気的に接続されている。入出力用同軸コネクタ33,34はそれぞれ同軸ケーブルを介して、電気特性測定器であるネットワークアナライザに接続されている。測定用回路基板10は、金属ベース30の上面にねじ留め等の方法により固定されている。
【0013】
吸引用パッド21は、測定用回路基板10の下面に、穴10aを覆うように当接されている。吸引用パッド21はエアーチューブ22を通して真空ポンプ(図示せず)に繋がっている。真空ポンプを稼働させると、吸引用パッド21はエアーを吸引する。吸引用パッド21は、測定用回路基板10の下面の接触部分からエアー漏れを防ぐ機能を有している。吸引用パッド21は金属ベース30内に収容されており、エアーチューブ22を介して金属ベース30に固定されている。この吸引用パッド21の材質としては、気密性に優れ、かつ、柔軟性がある材料が採用され、例えば、シリコンゴム、ネオプレンゴム、天然ゴム等がある。
【0014】
次に、前述の測定装置1を用いて非可逆回路素子の電気特性を測定する方法について説明する。
【0015】
本第1実施形態では非可逆回路素子として、図2〜図4に示す集中定数型アイソレータ41を用いる。図2に示すように、アイソレータ41は、概略、金属製下側ケース44と、樹脂製端子ケース43と、中心電極組立体53と、金属製上側ケース48と、永久磁石49と、絶縁性部材47と、抵抗素子Rと、整合用コンデンサ素子C1〜C3等を備えている。
【0016】
中心電極組立体53は、矩形板状のマイクロ波フェライト60の上面に、中心電極61〜63を略矩形状の絶縁性シート66(点線にて表示)を介在させて、それぞれの交差角が略120度になるように交差させて配置している。中心電極61〜63は、それぞれの一端側にポート部P1〜P3を有し、他端側にアース電極65が接続されている。中心電極61〜63共通のアース電極65は、フェライト60の下面を略覆うように設けられている。中心電極組立体53は、フェライト60の裏面に形成されたアース電極65が、樹脂製端子ケース43の窓部43cを通して、金属製下側ケース44の底壁44bにはんだ付け等の方法により接続され、接地される。
【0017】
図3に示すように、樹脂製端子ケース43には、表面実装用の入力外部端子54、出力外部端子55及び四つのアース外部端子56がインサートモールドされている。これらの外部端子54〜56は、一端が樹脂製端子ケース43の対向する側壁43aからそれぞれ外方向へ導出され、他端が樹脂製端子ケース43の底部43bに露出してそれぞれ入力引出電極部54a、出力引出電極部55a及びアース引出電極部56aを形成している(図1及び図6参照)。入力引出電極部54a及び出力引出電極部55aは、ポート部P1,P2にそれぞれはんだ付けされている。
【0018】
整合用コンデンサ素子C1〜C3は、ホット側コンデンサ電極がポート部P1〜P3にそれぞれはんだ付けされ、コールド側コンデンサ電極が樹脂製端子ケース43に露出しているアース引出電極部56aにそれぞれはんだ付けされている。
【0019】
抵抗素子Rは回路基板58上にはんだ付けされている。抵抗素子Rの一方は、回路基板58に設けられた信号パターンを介して、整合用コンデンサ素子C3のホット側コンデンサ電極に接続され、他方は樹脂製端子ケース43の底部43bに露出しているアース引出電極部56aに接続される。つまり、整合用コンデンサ素子C3と抵抗素子Rとは、中心電極63のポート部P3とアースとの間に電気的に並列に接続される。
【0020】
そして、樹脂製端子ケース43の下方から金属製下側ケース44が装着されている。金属製下側ケース44は、樹脂製端子ケース43にインサートモールドされているアース外部端子56にはんだ付けされている(図5参照)。この樹脂製端子ケース43内に、中心電極組立体53や整合用コンデンサ素子C1〜C3や抵抗素子R等を収容し、金属製上側ケース48を装着している。金属製上側ケース48と中心電極組立体53の間には、永久磁石49が配置されている。また、永久磁石49と整合用コンデンサ素子C1〜C3の間には、絶縁性部材47が配置されている。永久磁石49は中心電極組立体53に直流磁界を印加する。金属製下側ケース44と金属製上側ケース48は接合して金属ケースをなし、磁気回路を構成しており、ヨークとしても機能している。こうして、図4に示すアイソレータ41が得られる。
【0021】
さて、このアイソレータ41を、図1に示すように、搬送装置(図示せず)等を用いて、測定用回路基板10上に置く。このとき、アイソレータ41の各外部端子54,55,56は、それぞれの対応する電極11,12,13上に載置される(図1及び図5参照)。
【0022】
次に、真空ポンプを稼働させて、エアーチューブ22を通して、吸引用パッド21にてアイソレータ41の底面と測定用回路基板10の隙間のエアーを吸引する。このエアーの吸引によって、アイソレータ41の底面側と上面側に大気圧差が生じ、最大1気圧の力がアイソレータ41の上面にかかる。従って、アイソレータ41が測定用回路基板10側に引き寄せられ、アイソレータ41を一時的に固定する。こうして、アイソレータ41の外部端子54〜56を電極11,12,13に圧接して確実に接触させる。そして、エアーの吸引が行われている間に、アイソレータ41の電気測定を行う。
【0023】
アイソレータ41の電気測定が終わると、真空ポンプを停止させ、エアーの吸引をやめ、アイソレータ41を解放する。この後、電気測定が終了したアイソレータ41を搬送装置等で良否に分類されたトレイに移送する。
【0024】
以上の測定装置1は、吸引用パッド21によるエアーの吸引によって、大気圧でアイソレータ41の上面を均等に押さえ、アイソレータ41を測定用回路基板10に固定するので、従来の測定装置のように押さえ棒でアイソレータ41を押さえつける必要がない。従って、アイソレータ41内の永久磁石49や中心電極組立体53等を損傷しない。また、アイソレータ41の外部端子54〜56を押さえ治具等で押さえる必要がないので、外部端子54〜56が押さえ治具等で損傷することがない。
【0025】
また、アイソレータ41内にオープン不良があれば、このオープン不良を確実に検出することができる。例えば、図3の一点鎖線の円Aで囲んだ箇所で、ポート部P2と出力引出電極部55aが、はんだ70の量が不足してオープン不良を起こしていたとする(図1の左側参照)。この場合、アイソレータ41の上面は大気圧で均等に押さえられるが、この大気圧はアイソレータ41の内部に殆ど作用しない。従って、ポート部P2が出力引出電極部55aに接合されていないオープン不良を検出できる。これに対して従来の測定装置のように、押さえ棒を用いて金属製上側ケース48の上面を押圧力Fで押さえた場合には、大気圧と比較してバラツキの大きい押圧力Fが局部的に加わるためにポート部P2がたわみ、ポート部P2と出力引出電極部55aが一時的に接触してしまうことがある。このため、オープン不良を検出することができず、電気特性の測定を正確に行うことができない。
【0026】
また、最大1気圧の大気圧が、アイソレータ41の上面に均等にかかるだけなので、アイソレータ41内のはんだ接合を破損する心配がない。例えば、アース外部端子56と金属製下側ケース44のはんだ70による接合を破損することはない(図5参照)。ところが、従来の測定装置のように、押さえ棒を用いて金属製上側ケース48の上面を押圧力Fで押さえた場合には、押圧力Fのために金属製下側ケース44がたわみ、はんだ70の接合部でアース外部端子56と金属製下側ケース44が外れてしまう場合がある。
【0027】
さらに、気密シート14により、アイソレータ41の底面と測定用回路基板10の間にできる隙間を塞ぐので、アイソレータ41の底面と測定用回路基板10との間から漏れるエアーの量が減り、アイソレータ41を測定用回路基板10側に強力に吸引することができる。従って、アイソレータ41の外部端子54〜56を電極11〜13に確実に接触させることができるので、信頼性の高い電気測定をすることができる。なお、この気密シート14は必ずしも設ける必要はない。
【0028】
[第2実施形態、図6]
図6に示すように、測定装置2は、吸引用パッド21をアイソレータ41の底面に直接に当接するものである。測定用回路基板10の中央部には、吸引用パッド21の吸引口の径より大きい穴10cが設けられている。吸引用パッド21は穴10c内に配設され、その吸引口が測定用回路基板10の上面から若干突出している。
【0029】
以上の測定装置2は、吸引用パッド21が直接にアイソレータ41の底面を吸着するので、エアー漏れが殆どなくなる。従って、アイソレータ41の外部端子54〜56を、測定用回路基板10の電極11〜13に確実に接触させることができるので、信頼性の高い電気測定をすることができる。
【0030】
[第3実施形態、図7]
図7に示すように、測定装置3は、前記第2実施形態の吸引用パッド21の替わりに、伸縮自在なジャバラ構造の吸引用パッド21Aを用いたものである。吸引用パッド21Aは穴10c内に配設され、その吸引口が測定用回路基板10の上面から若干突出している。
【0031】
従って、吸引用パッド21Aの吸引口が確実にアイソレータ41の底面に吸着する。さらに、吸着した瞬間に、ジャバラ構造の吸引用パッド21Aが、吸引により下方向に縮み、吸引用パッド21Aに吸着されているアイソレータ41が測定用回路基板10側に引き寄せられる。こうして、アイソレータ41の外部端子54〜56が測定用回路基板10の電極11〜13に確実に接触することができるので、信頼性の高い電気測定をすることができる。
【0032】
[第4実施形態、図8]
図8に示すように、測定装置4は、測定用回路基板10の電極11〜13とアイソレータ41の外部端子54〜56とを、導電性ゴム材24を介して電気的に確実に接続したものである。導電性ゴム材24は測定用回路基板10の中央部に設けた複数の穴10a,10bの周囲部に配設されている。導電性ゴム材24には、ゴム材24の厚み方向には導通するが、水平方向には非導通の異方性導電ゴムを使用する。あるいは、測定用回路基板10の電極11〜13に対応した部分のみに通常の導電性ゴムを使用し、その他の部分には絶縁性ゴムを使用して構成した複合導電性ゴム材であってもよい。これにより、信頼性の高い電気測定をすることができる。また、この導電性ゴム材24は、アイソレータ41の底面と測定用回路基板10の間に形成される隙間を塞いでおり、前記第1実施形態の気密シート14と同様の機能を有する。
【0033】
さらに、測定装置4は、穴10aの周りに複数の小径穴10bを設けたものである。これにより、アイソレータ41を吸引するための穴の総面積が増え、アイソレータ41を吸引する力が強力になる。従って、アイソレータ41の外部端子54〜56を測定用回路基板10の電極11〜13に確実に接触させることができるので、信頼性の高い電気測定をすることができる。
【0034】
なお、本発明は、前記実施形態に限定されるものではなく、本発明の要旨の範囲内で種々の構成に変更することができる。
【0035】
【発明の効果】
以上の説明から明らかなように、本発明によれば、吸引用パッドにてエアーを吸引することにより非可逆回路素子を測定用回路基板側に引き寄せ、非可逆回路素子の外部端子を測定用回路基板に接触させるので、従来の測定装置のように非可逆回路素子を上から押さえ棒で押さえつける必要がなくなる。つまり、非可逆回路素子の内部に押圧力等の外力が殆ど作用せず、非可逆回路素子内のオープン不良を一時的に接触させたり、内部部品を破損させてしまう心配がなくなる。この結果、非可逆回路素子に損傷を与えることなく、正確に電気特性を測定することが可能な非可逆回路素子の測定装置を得ることができる。
【図面の簡単な説明】
【図1】本発明に係る非可逆回路素子の測定装置の第1実施形態を示す垂直断面図。
【図2】非可逆回路素子の一例を示す分解斜視図。
【図3】図2に示した非可逆回路素子の内部平面図。
【図4】図2に示した非可逆回路素子の外観斜視図。
【図5】本発明に係る非可逆回路素子の測定装置の作用効果を説明するための垂直断面図。
【図6】本発明に係る非可逆回路素子の測定装置の第2実施形態を示す垂直断面図。
【図7】本発明に係る非可逆回路素子の測定装置の第3実施形態を示す垂直断面図。
【図8】本発明に係る非可逆回路素子の測定装置の第4実施形態を示す垂直断面図。
【符号の説明】
1,2,3,4…測定装置
10…測定用回路基板
10a,10b,10c…穴
11,12,13…電極
14…気密シート(密閉部材)
21,21A…吸引用パッド
24…導電性ゴム材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a measuring device for non-reciprocal circuit elements such as isolators and circulators used in the microwave band, for example.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a measuring apparatus for measuring electrical characteristics of a surface mount type isolator employed in a mobile communication device such as a mobile phone is known. This measuring apparatus measures the electrical characteristics of the isolator in a state where the external terminal for surface mounting derived from the isolator body is pressed against the electrode pattern provided on the measurement circuit board. At this time, in the conventional measuring apparatus, the isolator body is pushed from above with a holding bar, and the external terminal is pressed against the circuit board for measurement.
[0003]
[Problems to be solved by the invention]
However, when the isolator body is pushed from above with a holding rod, even if there is an open failure inside the isolator (incorrect electrical connection between internal components), the open part will come into contact with the pressed force. Conduction may occur and open defects may not be detected. Further, since the force when pressed is applied to the internal parts, if this pressing force is too strong, problems such as cracks in the permanent magnets and ferrite that are internal parts occur. Or, if the pressing force is too strong, there is a problem that the electrical connection between the internal components is broken or the external terminal is deformed.
[0004]
Accordingly, an object of the present invention is to provide a non-reciprocal circuit element measuring apparatus capable of accurately measuring electrical characteristics without damaging the non-reciprocal circuit element.
[0005]
[Means and Actions for Solving the Problems]
In order to achieve the above object, a non-reciprocal circuit element measuring apparatus according to the present invention has a surface-mounted nonreciprocal circuit element placed on the surface of a circuit board for measurement and derived from the nonreciprocal circuit element body. An apparatus for measuring a nonreciprocal circuit element that measures an electrical property by pressing an external terminal to a measurement circuit board, wherein a hole is provided in the nonreciprocal circuit element placement area of the measurement circuit board, A suction pad is disposed on the back surface of the measurement circuit board so as to cover , and the measurement circuit board, the nonreciprocal circuit element, and a peripheral portion of a hole provided in the measurement circuit board. A sealing member for preventing air leakage from the gap is provided, or a conductive rubber material is disposed at a predetermined position on the surface of the measurement circuit board, and the measurement circuit board is Outside the nonreciprocal circuit element through a conductive rubber material And wherein the connecting terminal electrically. Alternatively, a suction pad is disposed in the hole, and the suction pad has a bellows structure .
[0006]
By sucking air with the suction pad, the nonreciprocal circuit element is sucked to the measurement circuit board side, and the external terminal of the nonreciprocal circuit element comes into pressure contact with the measurement circuit board, thereby enabling electrical measurement. Furthermore, by providing a sealing member for preventing air leakage from the gap between the measurement circuit board and the nonreciprocal circuit element around the hole provided in the measurement circuit board, the nonreciprocal circuit element is reliably Suction to the circuit board for measurement.
[0007]
Further, by adopting a bellows structure for the suction pad, the suction pad having the bellows structure is temporarily contracted during suction, and the nonreciprocal circuit element adsorbed to the suction pad is further drawn closer to the measurement circuit board side. . Therefore, the external terminal of the nonreciprocal circuit element is securely pressed against the measurement circuit board.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a nonreciprocal circuit device measuring apparatus according to the present invention will be described below with reference to the accompanying drawings. In each embodiment, the same parts and the same parts are denoted by the same reference numerals, and redundant description is omitted.
[0009]
[First Embodiment, FIGS. 1 to 5]
As shown in FIG. 1, the measuring apparatus 1 is roughly composed of a circuit board for measurement 10, an airtight sheet 14, a suction pad 21, a metal base 30, and input / output coaxial connectors 33, 34, and the like. Yes.
[0010]
The measurement circuit board 10 is made of, for example, a dielectric material, and has an input electrode 11, an output electrode 12, and a ground electrode 13 (see FIG. 5) on the upper surface in accordance with the position of an external terminal of a non-reciprocal circuit element (isolator) described later. ) Is formed. A hole 10a is provided in the central portion of the measurement circuit board 10 (in other words, in the nonreciprocal circuit element mounting area). The diameter of the hole 10 a is set smaller than the diameter of the suction port of the suction pad 21.
[0011]
Further, an airtight sheet 14 is disposed around the hole 10a. The airtight sheet 14 is for preventing air leakage from a gap formed between the measurement circuit board 10 and the bottom surface of the nonreciprocal circuit element when measuring the electrical characteristics of the nonreciprocal circuit element. As the material of the airtight sheet 14, a material having excellent airtightness and flexibility and insulating properties is adopted, and examples thereof include rubber, fluororesin, polyimide, and the like.
[0012]
The input electrode 11 and the output electrode 12 are electrically connected to input / output coaxial connectors 33 and 34 attached to the left and right of the measurement circuit board 10. The input / output coaxial connectors 33 and 34 are each connected to a network analyzer, which is an electrical characteristic measuring instrument, via a coaxial cable. The measurement circuit board 10 is fixed to the upper surface of the metal base 30 by a method such as screwing.
[0013]
The suction pad 21 is in contact with the lower surface of the measurement circuit board 10 so as to cover the hole 10a. The suction pad 21 is connected to a vacuum pump (not shown) through the air tube 22. When the vacuum pump is operated, the suction pad 21 sucks air. The suction pad 21 has a function of preventing air leakage from the contact portion on the lower surface of the measurement circuit board 10. The suction pad 21 is accommodated in the metal base 30 and is fixed to the metal base 30 via the air tube 22. As a material of the suction pad 21, a material having excellent airtightness and flexibility is employed, and examples thereof include silicon rubber, neoprene rubber, and natural rubber.
[0014]
Next, a method for measuring the electrical characteristics of the nonreciprocal circuit element using the above-described measuring apparatus 1 will be described.
[0015]
In the first embodiment, a lumped constant isolator 41 shown in FIGS. 2 to 4 is used as the nonreciprocal circuit element. As shown in FIG. 2, the isolator 41 generally includes a metal lower case 44, a resin terminal case 43, a center electrode assembly 53, a metal upper case 48, a permanent magnet 49, and an insulating member. 47, a resistance element R, matching capacitor elements C1 to C3, and the like.
[0016]
In the center electrode assembly 53, the center electrodes 61 to 63 are interposed on the upper surface of the rectangular plate-shaped microwave ferrite 60 with a substantially rectangular insulating sheet 66 (indicated by a dotted line), and the respective crossing angles are approximately. They are arranged so as to intersect at 120 degrees. The center electrodes 61 to 63 have port portions P1 to P3 on one end side, and a ground electrode 65 is connected to the other end side. The ground electrode 65 common to the center electrodes 61 to 63 is provided so as to substantially cover the lower surface of the ferrite 60. In the center electrode assembly 53, the ground electrode 65 formed on the back surface of the ferrite 60 is connected to the bottom wall 44b of the metal lower case 44 through a window 43c of the resin terminal case 43 by a method such as soldering. , Grounded.
[0017]
As shown in FIG. 3, a surface mounting input external terminal 54, an output external terminal 55, and four ground external terminals 56 are insert-molded in the resin terminal case 43. One end of each of the external terminals 54 to 56 is led out from the opposing side wall 43 a of the resin terminal case 43, and the other end is exposed to the bottom 43 b of the resin terminal case 43. The output lead electrode portion 55a and the ground lead electrode portion 56a are formed (see FIGS. 1 and 6). The input extraction electrode portion 54a and the output extraction electrode portion 55a are soldered to the port portions P1 and P2, respectively.
[0018]
In the matching capacitor elements C1 to C3, the hot side capacitor electrodes are soldered to the port portions P1 to P3, respectively, and the cold side capacitor electrodes are soldered to the ground lead electrode portions 56a exposed to the resin terminal case 43, respectively. ing.
[0019]
The resistance element R is soldered on the circuit board 58. One of the resistance elements R is connected to the hot-side capacitor electrode of the matching capacitor element C3 via a signal pattern provided on the circuit board 58, and the other is grounded exposed at the bottom 43b of the resin terminal case 43. Connected to the extraction electrode portion 56a. That is, the matching capacitor element C3 and the resistance element R are electrically connected in parallel between the port portion P3 of the center electrode 63 and the ground.
[0020]
A metal lower case 44 is mounted from below the resin terminal case 43. The metal lower case 44 is soldered to a ground external terminal 56 that is insert-molded in the resin terminal case 43 (see FIG. 5). In the resin terminal case 43, the center electrode assembly 53, the matching capacitor elements C1 to C3, the resistance element R and the like are accommodated, and a metal upper case 48 is mounted. A permanent magnet 49 is disposed between the metal upper case 48 and the center electrode assembly 53. An insulating member 47 is disposed between the permanent magnet 49 and the matching capacitor elements C1 to C3. The permanent magnet 49 applies a DC magnetic field to the center electrode assembly 53. The metal lower case 44 and the metal upper case 48 are joined to form a metal case, constitute a magnetic circuit, and also function as a yoke. In this way, the isolator 41 shown in FIG. 4 is obtained.
[0021]
Now, as shown in FIG. 1, the isolator 41 is placed on the measurement circuit board 10 by using a transfer device (not shown) or the like. At this time, the external terminals 54, 55, and 56 of the isolator 41 are placed on the corresponding electrodes 11, 12, and 13 (see FIGS. 1 and 5).
[0022]
Next, the vacuum pump is operated, and air in the gap between the bottom surface of the isolator 41 and the measurement circuit board 10 is sucked by the suction pad 21 through the air tube 22. By this air suction, an atmospheric pressure difference is generated between the bottom surface side and the top surface side of the isolator 41, and a force of 1 atm maximum is applied to the top surface of the isolator 41. Therefore, the isolator 41 is drawn toward the measurement circuit board 10 side, and the isolator 41 is temporarily fixed. In this way, the external terminals 54 to 56 of the isolator 41 are brought into pressure contact with the electrodes 11, 12, and 13 to be surely contacted. Then, the electrical measurement of the isolator 41 is performed while the air is being sucked.
[0023]
When the electrical measurement of the isolator 41 is completed, the vacuum pump is stopped, the air suction is stopped, and the isolator 41 is released. Thereafter, the isolator 41 for which the electrical measurement has been completed is transferred to a tray classified as good or bad by a transport device or the like.
[0024]
The above measuring apparatus 1 presses the upper surface of the isolator 41 evenly at atmospheric pressure by sucking air by the suction pad 21 and fixes the isolator 41 to the measurement circuit board 10, so that it is pressed like a conventional measuring apparatus. There is no need to press the isolator 41 with a stick. Therefore, the permanent magnet 49 and the center electrode assembly 53 in the isolator 41 are not damaged. Further, since it is not necessary to hold the external terminals 54 to 56 of the isolator 41 with a holding jig or the like, the external terminals 54 to 56 are not damaged by the holding jig or the like.
[0025]
Further, if there is an open defect in the isolator 41, this open defect can be reliably detected. For example, it is assumed that the port portion P2 and the output extraction electrode portion 55a have an open defect due to insufficient amount of the solder 70 in a portion surrounded by a one-dot chain line circle A in FIG. 3 (see the left side in FIG. 1). In this case, the upper surface of the isolator 41 is uniformly pressed by atmospheric pressure, but this atmospheric pressure hardly acts on the inside of the isolator 41. Therefore, it is possible to detect an open failure in which the port portion P2 is not joined to the output extraction electrode portion 55a. On the other hand, when the upper surface of the metal upper case 48 is pressed by the pressing force F using a pressing bar as in the conventional measuring apparatus, the pressing force F having a large variation compared to the atmospheric pressure is locally localized. Therefore, the port part P2 may bend and the port part P2 and the output extraction electrode part 55a may be in temporary contact with each other. For this reason, open defects cannot be detected, and electrical characteristics cannot be measured accurately.
[0026]
Further, since an atmospheric pressure of 1 atm at maximum is applied evenly to the upper surface of the isolator 41, there is no fear of damaging the solder joint in the isolator 41. For example, the joint between the ground external terminal 56 and the metal lower case 44 by the solder 70 is not damaged (see FIG. 5). However, when the upper surface of the metal upper case 48 is pressed with a pressing force F using a pressing bar as in a conventional measuring apparatus, the metal lower case 44 bends due to the pressing force F, and the solder 70 In some cases, the ground external terminal 56 and the metal lower case 44 come off at the joint.
[0027]
Further, since the airtight sheet 14 closes the gap formed between the bottom surface of the isolator 41 and the measurement circuit board 10, the amount of air leaking from between the bottom surface of the isolator 41 and the measurement circuit board 10 is reduced, and the isolator 41 is Powerful suction can be performed on the measurement circuit board 10 side. Therefore, since the external terminals 54 to 56 of the isolator 41 can be reliably brought into contact with the electrodes 11 to 13, highly reliable electrical measurement can be performed. The airtight sheet 14 is not necessarily provided.
[0028]
[Second Embodiment, FIG. 6]
As shown in FIG. 6, the measuring device 2 directly contacts the suction pad 21 with the bottom surface of the isolator 41. A hole 10 c larger than the diameter of the suction port of the suction pad 21 is provided in the center of the measurement circuit board 10. The suction pad 21 is disposed in the hole 10 c, and the suction port slightly protrudes from the upper surface of the measurement circuit board 10.
[0029]
In the measuring apparatus 2 described above, since the suction pad 21 directly adsorbs the bottom surface of the isolator 41, there is almost no air leakage. Therefore, since the external terminals 54 to 56 of the isolator 41 can be reliably brought into contact with the electrodes 11 to 13 of the measurement circuit board 10, highly reliable electrical measurement can be performed.
[0030]
[Third Embodiment, FIG. 7]
As shown in FIG. 7, the measuring device 3 uses a suction pad 21 </ b> A having an expandable bellows structure instead of the suction pad 21 of the second embodiment. The suction pad 21A is disposed in the hole 10c, and the suction port slightly protrudes from the upper surface of the measurement circuit board 10.
[0031]
Accordingly, the suction port of the suction pad 21 </ b> A is reliably adsorbed to the bottom surface of the isolator 41. Further, at the moment of suction, the bellows structure suction pad 21A is contracted downward by suction, and the isolator 41 sucked by the suction pad 21A is drawn toward the measurement circuit board 10 side. Thus, since the external terminals 54 to 56 of the isolator 41 can reliably contact the electrodes 11 to 13 of the measurement circuit board 10, highly reliable electrical measurement can be performed.
[0032]
[Fourth Embodiment, FIG. 8]
As shown in FIG. 8, the measuring device 4 is a device in which the electrodes 11 to 13 of the measurement circuit board 10 and the external terminals 54 to 56 of the isolator 41 are electrically and reliably connected via the conductive rubber material 24. It is. The conductive rubber material 24 is disposed around the plurality of holes 10 a and 10 b provided in the central portion of the measurement circuit board 10. The conductive rubber material 24 is made of anisotropic conductive rubber that conducts in the thickness direction of the rubber material 24 but is non-conductive in the horizontal direction. Or even if it is the composite conductive rubber material comprised using normal conductive rubber only for the part corresponding to the electrodes 11-13 of the circuit board 10 for a measurement, and using insulating rubber for the other part. Good. Thereby, electrical measurement with high reliability can be performed. Further, the conductive rubber material 24 closes a gap formed between the bottom surface of the isolator 41 and the measurement circuit board 10 and has the same function as the airtight sheet 14 of the first embodiment.
[0033]
Furthermore, the measuring apparatus 4 is provided with a plurality of small diameter holes 10b around the hole 10a. Thereby, the total area of the holes for sucking the isolator 41 is increased, and the force for sucking the isolator 41 becomes strong. Therefore, since the external terminals 54 to 56 of the isolator 41 can be reliably brought into contact with the electrodes 11 to 13 of the measurement circuit board 10, highly reliable electrical measurement can be performed.
[0034]
In addition, this invention is not limited to the said embodiment, It can change into a various structure within the range of the summary of this invention.
[0035]
【The invention's effect】
As is apparent from the above description, according to the present invention, the nonreciprocal circuit element is drawn to the measurement circuit board side by sucking air with the suction pad, and the external terminal of the nonreciprocal circuit element is connected to the measurement circuit. Since it is brought into contact with the substrate, it is not necessary to press the nonreciprocal circuit element from above with a pressing bar as in the conventional measuring apparatus. That is, almost no external force such as a pressing force is applied to the inside of the nonreciprocal circuit element, and there is no fear that the open defect in the nonreciprocal circuit element is temporarily brought into contact or the internal components are damaged. As a result, it is possible to obtain a non-reciprocal circuit device measuring apparatus capable of accurately measuring electrical characteristics without damaging the non-reciprocal circuit device.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view showing a first embodiment of a non-reciprocal circuit device measuring apparatus according to the present invention.
FIG. 2 is an exploded perspective view showing an example of a non-reciprocal circuit element.
3 is an internal plan view of the non-reciprocal circuit device shown in FIG. 2;
4 is an external perspective view of the non-reciprocal circuit device shown in FIG. 2. FIG.
FIG. 5 is a vertical sectional view for explaining the operation and effect of the non-reciprocal circuit device measuring apparatus according to the present invention.
FIG. 6 is a vertical sectional view showing a second embodiment of the nonreciprocal circuit device measuring apparatus according to the invention.
FIG. 7 is a vertical sectional view showing a third embodiment of the non-reciprocal circuit device measuring apparatus according to the invention.
FIG. 8 is a vertical sectional view showing a fourth embodiment of the nonreciprocal circuit device measuring apparatus according to the invention.
[Explanation of symbols]
1, 2, 3, 4 ... measuring device 10 ... circuit boards for measurement 10a, 10b, 10c ... holes 11, 12, 13 ... electrode 14 ... airtight sheet (sealing member)
21, 21A ... Suction pad 24 ... Conductive rubber material

Claims (3)

表面実装型の非可逆回路素子を測定用回路基板の表面に載置し、非可逆回路素子本体から導出している外部端子を測定用回路基板に圧接して電気特性を測定する非可逆回路素子の測定装置において、
前記測定用回路基板の非可逆回路素子載置エリア内に穴が設けられ、該穴を覆うように、前記測定用回路基板の裏面に吸引用パッドが配設されており、
前記測定用回路基板に設けた穴の周囲部に、前記測定用回路基板と前記非可逆回路素子との隙間からのエアー漏れを防止するための密閉部材が設けられていること、
を特徴とする非可逆回路素子の測定装置。
A non-reciprocal circuit element that mounts a surface mount type nonreciprocal circuit element on the surface of a circuit board for measurement and presses an external terminal derived from the main body of the nonreciprocal circuit element to the circuit board for measurement to measure electrical characteristics. In the measuring device of
A hole is provided in the nonreciprocal circuit element mounting area of the measurement circuit board, and a suction pad is disposed on the back surface of the measurement circuit board so as to cover the hole ,
A sealing member for preventing air leakage from a gap between the measurement circuit board and the non-reciprocal circuit element is provided around a hole provided in the measurement circuit board.
An apparatus for measuring a nonreciprocal circuit device.
表面実装型の非可逆回路素子を測定用回路基板の表面に載置し、非可逆回路素子本体から導出している外部端子を測定用回路基板に圧接して電気特性を測定する非可逆回路素子の測定装置において、
前記測定用回路基板の非可逆回路素子載置エリア内に穴が設けられ、該穴を覆うように、前記測定用回路基板の裏面に吸引用パッドが配設されており、
前記測定用回路基板の表面の所定の位置に導電性ゴム材を配設し、前記測定用回路基板が前記導電性ゴム材を介して前記非可逆回路素子の外部端子と電気的に接続していること、
を特徴とする非可逆回路素子の測定装置。
A non-reciprocal circuit element that mounts a surface mount type nonreciprocal circuit element on the surface of a circuit board for measurement and presses an external terminal derived from the main body of the nonreciprocal circuit element to the circuit board for measurement to measure electrical characteristics. In the measuring device of
A hole is provided in the nonreciprocal circuit element mounting area of the measurement circuit board, and a suction pad is disposed on the back surface of the measurement circuit board so as to cover the hole,
A conductive rubber material is disposed at a predetermined position on the surface of the measurement circuit board, and the measurement circuit board is electrically connected to an external terminal of the nonreciprocal circuit element through the conductive rubber material. Being
Measuring device of the non-reciprocal circuit element you characterized.
表面実装型の非可逆回路素子を測定用回路基板の表面に載置し、非可逆回路素子本体から導出している外部端子を測定用回路基板に圧接して電気特性を測定する非可逆回路素子の測定装置において、
前記測定用回路基板の非可逆回路素子載置エリア内に穴が設けられ、該穴内に吸引用パッドが配設されており、
前記吸引用パッドがジャバラ構造であること、
を特徴とする非可逆回路素子の測定装置。
A non-reciprocal circuit element that mounts a surface mount type nonreciprocal circuit element on the surface of a circuit board for measurement and presses an external terminal derived from the main body of the nonreciprocal circuit element to the circuit board for measurement to measure electrical characteristics. In the measuring device of
A hole is provided in the nonreciprocal circuit element mounting area of the measurement circuit board, and a suction pad is disposed in the hole ,
The suction pad has a bellows structure;
An apparatus for measuring a nonreciprocal circuit device.
JP2001218708A 2001-07-18 2001-07-18 Non-reciprocal circuit element measurement device Expired - Fee Related JP4720038B2 (en)

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JPH01187835A (en) * 1988-01-22 1989-07-27 Hitachi Ltd Attraction pad
JPH0370383U (en) * 1989-11-13 1991-07-15
JPH0945442A (en) * 1995-07-27 1997-02-14 Hitachi Ltd Handling method for ic socket and semiconductor device using it

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Publication number Priority date Publication date Assignee Title
JP2773276B2 (en) * 1989-08-10 1998-07-09 ソニー株式会社 Comb filter
JPH05275506A (en) * 1992-03-27 1993-10-22 Nec Kansai Ltd Device for inspecting semiconductor device

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Publication number Priority date Publication date Assignee Title
JPH01187835A (en) * 1988-01-22 1989-07-27 Hitachi Ltd Attraction pad
JPH0370383U (en) * 1989-11-13 1991-07-15
JPH0945442A (en) * 1995-07-27 1997-02-14 Hitachi Ltd Handling method for ic socket and semiconductor device using it

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