JPH07130541A - Manufacture of coil device - Google Patents
Manufacture of coil deviceInfo
- Publication number
- JPH07130541A JPH07130541A JP29737793A JP29737793A JPH07130541A JP H07130541 A JPH07130541 A JP H07130541A JP 29737793 A JP29737793 A JP 29737793A JP 29737793 A JP29737793 A JP 29737793A JP H07130541 A JPH07130541 A JP H07130541A
- Authority
- JP
- Japan
- Prior art keywords
- shaped core
- groove
- shaped
- core
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気、電子機器等に用
いられるトランスやインダクタンス素子等のコイル装置
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a coil device such as a transformer or an inductance element used in electric or electronic equipment.
【０００２】[0002]
【従来の技術】トランスやインダクタンス素子等の各種
のコイル装置は、フェライト等の磁性材料で形成された
磁性コアに線材を巻回することにより巻線した構成であ
り、近年、電気、電子機器の小型化に伴ってコイル装置
の小型化、薄型化が要求されている。2. Description of the Related Art Various coil devices such as transformers and inductance elements are constructed by winding a wire around a magnetic core made of a magnetic material such as ferrite. Along with the miniaturization, miniaturization and thinning of the coil device are required.
【０００３】特公昭５３−３６１４０号等に開示されて
いるように、従来のコイル装置の製造方法は、磁性コア
に直接線材を巻回して巻線するか、あるいはボビンを介
して巻線を施す構成が主流であった。As disclosed in Japanese Examined Patent Publication No. Sho 53-36140 and the like, in the conventional method for manufacturing a coil device, a wire is directly wound around a magnetic core and wound, or wound through a bobbin. The composition was the mainstream.
【０００４】また、本出願人が特公昭６０−５０３３１
号で提案しているように、コイル装置としてのインダク
タンス素子の製造方法において、磁性体のフェライト粉
末を含む絶縁性塗料と、巻線となる周回する導体パター
ンを形成するための導電性塗料とを交互に印刷積層し
て、磁性体と導電性塗料を同時焼成させる構成が開示さ
れている。Further, the applicant of the present invention has disclosed that the Japanese Patent Publication No. 60-50331.
In the method for manufacturing an inductance element as a coil device, an insulating coating material containing ferrite powder of a magnetic material and a conductive coating material for forming a winding conductive pattern to be a winding are proposed in A configuration is disclosed in which the magnetic material and the conductive paint are fired simultaneously by alternately printing and laminating.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記の従来
例で示したコイル装置の製造方法では以下のようにそれ
ぞれ問題点がある。The coil device manufacturing method shown in the above-mentioned conventional example has the following problems.
【０００６】磁性コアに直接あるいはボビンを介し線材
を巻回して巻線を施す方法では、磁性コア、ボビン及び
コイルの寸法誤差の影響を受けるため、コイルの小型化
又は高密度化への対応が困難であり、コイル装置の小型
化あるいは薄型化に不向きである。In the method of winding a wire around a magnetic core directly or via a bobbin for winding, the size of the coil is reduced because of the influence of the dimensional error of the magnetic core, the bobbin and the coil. It is difficult and not suitable for making the coil device smaller or thinner.
【０００７】磁性体と導電性塗料とを交互に印刷積層
し、同時焼成したものはコイルを形成する導電性塗料の
膜厚が薄いため、電流容量が小さいという欠点があり、
大きな電流容量を必要とするコイル装置の製造方法には
適さない。A magnetic material and a conductive paint which are alternately printed and laminated and co-fired have a drawback that the current capacity is small because the thickness of the conductive paint forming the coil is thin.
It is not suitable for a manufacturing method of a coil device that requires a large current capacity.
【０００８】本発明は、上記の点に鑑み、コイル装置の
小型化に伴うコイル導体パターンの小型化又は高密度化
に対応し、十分な電流容量を確保できるコイル装置の製
造方法を提供することを目的とする。In view of the above points, the present invention provides a method for manufacturing a coil device, which can cope with the miniaturization or high density of the coil conductor pattern accompanying the miniaturization of the coil device and can secure a sufficient current capacity. With the goal.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明のコイル装置の製造方法は、相互に一体化さ
れる第１の板状磁性コアと第２の板状磁性コアとで構成
される内部空間にコイルを配した場合において、前記第
１の板状磁性コアの一面に前記内部空間の少なくとも一
部を構成する凹部を設け、該凹部に導電性ペーストを印
刷し焼結することにより導電層を形成し、エッチングに
より該導電層でコイル導体パターンを形成することを特
徴としている。In order to achieve the above object, a method of manufacturing a coil device according to the present invention comprises a first plate-shaped magnetic core and a second plate-shaped magnetic core which are integrated with each other. When a coil is arranged in the internal space that is formed, a concave portion that forms at least a part of the internal space is provided on one surface of the first plate-shaped magnetic core, and a conductive paste is printed and sintered in the concave portion. Thus, the conductive layer is formed, and the coil conductor pattern is formed by the conductive layer by etching.
【００１０】また、前記第１の板状磁性コアの前記凹部
の底面から当該磁性コアの裏面に貫通する貫通孔を形成
し、該貫通孔の内部及び前記凹部に導電性ペーストを印
刷し焼結してもよい。A through hole penetrating from the bottom surface of the recess of the first plate-shaped magnetic core to the back surface of the magnetic core is formed, and a conductive paste is printed inside the through hole and the recess and sintered. You may.
【００１１】また、前記導電性ペーストとして銀ペース
トを用いてもよい。A silver paste may be used as the conductive paste.
【００１２】[0012]
【作用】本発明のコイル装置の製造方法においては、第
１の板状磁性コアの凹部に導電性ペーストを印刷、焼結
（焼き付け）して導電層を形成した後、該導電層にエッ
チングを施すことにより、凹部にスパイラル状等のコイ
ル導体パターンを形成しており、コイル導体パターンの
巻き数や線幅がエッチングにより自在に設定可能であ
り、コイル導体パターンの小型化又は高密度化が可能で
ある。また、凹部に形成する前記導電層は、十分な厚さ
で形成することができるため、コイル導体パターンの電
流容量を大きくすることが可能である。さらに、工程の
自動化が可能であるため量産に適し、製造コストの低減
が可能である。従って、従来の磁性コアに線材からなる
巻線を直接あるいはボビンを介して巻回したり、磁性体
と導電性塗料とを交互に印刷積層し、同時焼成してコイ
ルを形成する方法と比較して、コイル装置の小型化や薄
型化に適しており、コイルの電流容量も大きくすること
が可能であり、製造が容易で低コストである。In the method for manufacturing a coil device of the present invention, the conductive paste is printed and sintered (baked) in the recess of the first plate-shaped magnetic core to form the conductive layer, and then the conductive layer is etched. By applying it, a spiral-shaped coil conductor pattern is formed in the recess, and the number of turns and line width of the coil conductor pattern can be freely set by etching, enabling miniaturization or higher density of the coil conductor pattern. Is. Further, since the conductive layer formed in the recess can be formed with a sufficient thickness, it is possible to increase the current capacity of the coil conductor pattern. Furthermore, since the process can be automated, it is suitable for mass production and the manufacturing cost can be reduced. Therefore, in comparison with the conventional method in which a coil made of a wire is wound around a magnetic core directly or via a bobbin, or by alternately printing and laminating a magnetic material and a conductive coating and simultaneously firing to form a coil. The coil device is suitable for downsizing and thinning, the current capacity of the coil can be increased, and the manufacturing is easy and the cost is low.
【００１３】また、第１の板状磁性コアにその凹部の底
面から裏面に貫通する貫通孔を形成し、該貫通孔の内部
及び前記凹部に導電性ペーストを印刷し焼結することに
より、凹部に形成された導電層と一体となった接続用の
リード部を同時に形成することができ、導電層をエッチ
ングすることで得られたコイル導体パターンと第１の板
状磁性コア裏面の端子（又は電極）とをそのリード部で
接続することができる。Further, a through hole penetrating from the bottom surface of the recess to the back surface is formed in the first plate-shaped magnetic core, and a conductive paste is printed and sintered in the through hole and in the recess to form the recess. A connecting lead portion integrated with the conductive layer formed on the first conductive magnetic layer can be formed at the same time, and the coil conductor pattern obtained by etching the conductive layer and the terminal on the back surface of the first plate-shaped magnetic core (or The electrode) can be connected with the lead portion.
【００１４】なお、導電性ペーストは、銀ペーストを用
いることにより、エッチング後のスパイラル状等のコイ
ル導体パターンにメッキ処理等の腐食防止を施す必要が
なく、電気抵抗の低い良好な特性が得られる。By using a silver paste as the conductive paste, it is not necessary to perform corrosion prevention such as plating on the spiral coil conductor pattern after etching, and good characteristics with low electric resistance can be obtained. .
【００１５】[0015]
【実施例】以下、本発明に係るコイル装置の製造方法の
実施例を図面に従って説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a coil device according to the present invention will be described below with reference to the drawings.
【００１６】図１乃至図８は本発明の第１実施例を示
す。図１は本実施例によって得られるインダクタンス素
子１を示しており、該インダクタンス素子１は、スパイ
ラル状コイル導体パターン２を設けた第１の板状磁性コ
アとしての凹溝付き円板状コア（極めて薄型の円形ポッ
トコア）３と、第２の板状磁性コアとしての円板状コア
４とを接着等で一体化したものであり、以下にこのイン
ダクタンス素子１の製造方法を示す。1 to 8 show a first embodiment of the present invention. FIG. 1 shows an inductance element 1 obtained according to the present embodiment. The inductance element 1 is a disc-shaped core with a groove as a first plate-shaped magnetic core provided with a spiral coil conductor pattern 2 (extremely A thin circular pot core 3 and a disk-shaped core 4 as a second plate-shaped magnetic core are integrated by adhesion or the like. The method for manufacturing the inductance element 1 will be described below.
【００１７】前記凹溝付き円板状コア３は、図２及び図
３に示すように、平板部５の一面の中央に円柱状部６
を、周縁部に円環状部７をそれぞれ一体に有し、円柱状
部６と円環状部７の間に円環状凹溝（凹部）８が設けら
れたものであり、高抵抗フェライトを一体成型して焼結
したものである。前記円柱状部６及び円環状部７は、両
者の端面が同一高さになるように形成し、前記円環状凹
溝８の幅は用途に応じた所望のコイル導体パターンに対
応させて任意の幅に設定する。なお、凹溝付き円板状コ
ア３は数mm程度の厚さ（高さ）とし、円環状凹溝８の深
さは１００μｍ〜２００μｍ程度としている。As shown in FIGS. 2 and 3, the disc-shaped core 3 with the concave groove has a cylindrical portion 6 at the center of one surface of the flat plate portion 5.
Is integrally formed with a ring-shaped portion 7 at the peripheral portion, and a ring-shaped groove (recess) 8 is provided between the column-shaped portion 6 and the ring-shaped portion 7, and a high resistance ferrite is integrally molded. And then sintered. The columnar portion 6 and the annular portion 7 are formed so that both end surfaces thereof have the same height, and the width of the annular recessed groove 8 is arbitrary corresponding to a desired coil conductor pattern according to the application. Set to width. The disc-shaped core 3 with concave grooves has a thickness (height) of about several mm, and the depth of the circular concave groove 8 is about 100 μm to 200 μm.
【００１８】次に、図４のように前記凹溝付き円板状コ
ア３の円環状凹溝８の底面に導電性ペーストとしての銀
ペーストを印刷し焼結する（焼き付ける）ことで円環状
導電層９を形成する。すなわち、スクリーン印刷あるい
はパット印刷（転写による印刷）といった印刷方法によ
り、円環状凹溝８底面に銀ペーストを印刷し乾燥する工
程を数回繰り返した後焼結するか、あるいは印刷、焼結
工程を数回繰り返し行うことにより、所望の厚さの円環
状導電層９を得る。なお、後工程のフォトエッチング法
による処理を考慮した場合、円環状導電層９の上面が前
記円柱状部６及び円環状部７と実質的に同一高さとなる
ことが望ましい。Next, as shown in FIG. 4, silver paste as a conductive paste is printed on the bottom surface of the annular groove 8 of the disk-shaped core 3 with the groove and sintered (baked) to form an annular conductive material. Form the layer 9. That is, by a printing method such as screen printing or pad printing (printing by transfer), the step of printing the silver paste on the bottom surface of the annular groove 8 and drying it is repeated several times and then sintered, or the printing and sintering steps are performed. By repeating the process several times, the annular conductive layer 9 having a desired thickness is obtained. It is preferable that the upper surface of the annular conductive layer 9 has substantially the same height as the cylindrical portion 6 and the annular portion 7 in consideration of the treatment by the photoetching method in the subsequent step.
【００１９】それから、図５及び図６に示すように、前
記円環状導電層９にフォトエッチング法によるエッチン
グを施し、円環状凹溝８底面に所望の導体パターンとし
てのスパイラル状コイル導体パターン２をそれぞれ形成
する。すなわち、円環状導電層９上面にフォトレジスト
を塗布し、そのフォトレジスト層に数ターン周回するス
パイラル状パターンを露光し、スパイラル状パターンの
フォトレジスト層で被覆された部分以外をエッチングで
除去してスパイラル状コイル導体パターン２をそれぞれ
形成する。Then, as shown in FIGS. 5 and 6, the annular conductive layer 9 is etched by a photo-etching method to form a spiral coil conductor pattern 2 as a desired conductor pattern on the bottom surface of the annular groove 8. Form each. That is, a photoresist is applied to the upper surface of the ring-shaped conductive layer 9, a spiral pattern that circulates for several turns is exposed to the photoresist layer, and the portion of the spiral pattern other than the portion covered with the photoresist layer is removed by etching. The spiral coil conductor patterns 2 are formed respectively.
【００２０】前記円板状コア４は、図７及び図８に示す
ように、前記凹溝付き円板状コア３と同径の円板状磁性
コアであり、高抵抗フェライトを一体成型して焼結した
ものである。As shown in FIGS. 7 and 8, the disk-shaped core 4 is a disk-shaped magnetic core having the same diameter as that of the disk-shaped core 3 with a groove, and is formed by integrally molding a high resistance ferrite. It is a sintered product.
【００２１】そして、前記円環状凹溝８を有する凹溝付
き円板状コア３の上面と前記円板状コア４の底面とを対
向させ、円板状コア４の底面に凹溝付き円板状コア３の
円柱状部６及び円環状部７の端面を接面し、凹溝付き円
板状コア３と円板状コア４とを一体に固定する。なお、
凹溝付き円板状コア３と円板状コア４とは、接着剤を用
いて接着固定するか、あるいは両者を接面した状態で固
定金具等で挟持する。Then, the upper surface of the disk-shaped core 3 with a groove having the annular groove 8 and the bottom surface of the disk-shaped core 4 are opposed to each other, and the disk with a groove is formed on the bottom surface of the disk-shaped core 4. The end faces of the cylindrical portion 6 and the annular portion 7 of the cylindrical core 3 are brought into contact with each other, and the disc-shaped core 3 with a groove and the disc-shaped core 4 are integrally fixed. In addition,
The disk-shaped core 3 with a groove and the disk-shaped core 4 are adhered and fixed using an adhesive agent, or are sandwiched by fixing metal fittings or the like in a state where they are in contact with each other.
【００２２】以上により、図１に示した如く、凹溝付き
円板状コア３と円板状コア４とで囲まれた円環状凹溝８
からなる内部空間１０にスパイラル状コイル導体パター
ン２を有し、凹溝付き円板状コア３の円柱状部６及び円
環状部７の端面と円板状コア４底面とが接面して閉磁路
が構成されたインダクタンス素子１が得られる。As described above, as shown in FIG. 1, the annular groove 8 surrounded by the disk-shaped core 3 with a groove and the disk-shaped core 4 is formed.
Has a spiral coil conductor pattern 2 in an inner space 10 made of, and the end faces of the columnar portion 6 and the annular portion 7 of the disk-shaped core 3 with concave grooves are in contact with the bottom surface of the disk-shaped core 4 to close the magnetic field. An inductance element 1 having a path is obtained.
【００２３】以上の第１実施例によると、印刷法により
円環状凹溝８の形状に合う円環状導電層９を形成するた
め、円環状凹溝８の形状への対応が容易で、小型のフェ
ライトコアにも対応できる。また、スパイラル状コイル
導体パターン２は円環状凹溝８底面に焼き付けられた前
記円環状導電層９をフォトエッチング法により所望の導
体パターンに加工して形成するため、コイルの巻き数や
線幅を高い寸法精度で自在に設定でき、スパイラル状コ
イル導体パターンの高密度化も容易であり、インダクタ
ンス素子の小型化や薄型化に適している。また、前記円
環状導電層９は、導電性ペーストを印刷し乾燥する工程
を数回繰り返した後焼結するか、あるいは印刷、焼結工
程を数回繰り返し行うことにより十分な厚さで形成する
ことができるため、コイル導体パターンの電流容量の大
きくすることが可能である。さらに、前記各工程は自動
化が可能であるため量産に適し、製造コストの低減を図
ることができる。According to the first embodiment described above, since the ring-shaped conductive layer 9 that matches the shape of the ring-shaped groove 8 is formed by the printing method, the shape of the ring-shaped groove 8 can be easily accommodated and the size can be reduced. It can also be used for ferrite cores. Further, since the spiral coil conductor pattern 2 is formed by processing the ring-shaped conductive layer 9 baked on the bottom surface of the ring-shaped groove 8 into a desired conductor pattern by a photo-etching method, the number of turns and the line width of the coil can be reduced. It can be freely set with high dimensional accuracy, and it is easy to increase the density of the spiral coil conductor pattern, making it suitable for downsizing and thinning of inductance elements. In addition, the annular conductive layer 9 is formed to have a sufficient thickness by repeating the steps of printing and drying the conductive paste several times and then sintering, or repeating the printing and sintering steps several times. Therefore, the current capacity of the coil conductor pattern can be increased. Furthermore, since each of the above steps can be automated, it is suitable for mass production, and the manufacturing cost can be reduced.
【００２４】また、円環状導電層９を形成する導電性ペ
ーストとして銀ペーストを用いることにより、フォトエ
ッチング後のスパイラル状コイル導体パターン２にメッ
キ処理等の腐食防止を施す必要がなく、該スパイラル状
コイル導体パターン２は電気抵抗が低く、良好な特性が
得られる。Further, by using a silver paste as the conductive paste for forming the annular conductive layer 9, it is not necessary to prevent the spiral coil conductor pattern 2 after photoetching from being corroded by plating or the like. The coil conductor pattern 2 has a low electric resistance and good characteristics can be obtained.
【００２５】図９乃至図１１は本発明の第２実施例を示
す。図９は本実施例によって得られるインダクタンス素
子１Ａを示しており、該インダクタンス素子１Ａは前記
第１実施例で示したスパイラル状コイル導体パターン２
を有する第１の板状磁性コアとしての凹溝付き円板状コ
ア３と、第２の板状磁性コアとしての凹部付き円板状コ
ア２１とを一体化したものである。この第２実施例の場
合も凹溝付き円板状コア３にスパイラル状コイル導体パ
ターン２をフォトエッチングで形成する工程は前述の第
１実施例と同じである。9 to 11 show a second embodiment of the present invention. FIG. 9 shows an inductance element 1A obtained according to this embodiment. The inductance element 1A is the spiral coil conductor pattern 2 shown in the first embodiment.
The disc-shaped core 3 with a groove as a first plate-shaped magnetic core and the disc-shaped core 21 with a recess as a second plate-shaped magnetic core are integrated. Also in the case of the second embodiment, the step of forming the spiral coil conductor pattern 2 on the disk-shaped core 3 with the concave groove by photoetching is the same as that of the first embodiment.
【００２６】前記凹部付き円板状コア２１は、図１０及
び図１１に示すように、前記凹溝付き円板状コア３と同
径の円板の底面周縁部に円環状部２２を突設する如く底
面側に円形状凹部２３を形成した磁性コアであり、高抵
抗フェライトを一体成型して焼結したものである。As shown in FIGS. 10 and 11, the recessed disk-shaped core 21 has an annular portion 22 protruding from the bottom peripheral edge of a disk having the same diameter as the recessed disk-shaped core 3. As described above, the magnetic core has a circular concave portion 23 formed on the bottom surface side, and is formed by integrally molding and sintering high-resistance ferrite.
【００２７】そして、円環状凹溝８を有する前記凹溝付
き円板状コア３の上面と円形状凹部２３を有する前記円
板状コア２１の底面とを対向させ、凹溝付き円板状コア
３の円環状部７の端面と円板状コア２１の円環状部２２
の端面とを接面し、凹溝付き円板状コア３と円板状コア
２１とを接着等の固定手段で固定一体化する。Then, the upper surface of the disc-shaped core 3 with the concave groove having the annular concave groove 8 and the bottom surface of the disc-shaped core 21 having the circular concave portion 23 are opposed to each other, and the disc-shaped core with the concave groove is provided. 3, the end surface of the annular portion 7 and the annular portion 22 of the disk-shaped core 21.
And the disk-shaped core 3 with concave groove and the disk-shaped core 21 are fixed and integrated by a fixing means such as bonding.
【００２８】以上により、図９に示すように、凹溝付き
円板状コア３と凹部付き円板状コア２１とで囲まれた円
環状凹溝８及び円形状凹部２３からなる内部空間２０に
スパイラル状コイル導体パターン２を有し、凹溝付き円
板状コア３の円環状部７と円板状コア２１の円環状部２
２とが接面して閉磁路を構成し、凹溝付き円板状コア３
の円柱状部６端面と円板状コア２１の円形状凹部２３天
井面との間に磁気ギャップ（エアギャップ）２５を有す
るインダクタンス素子１Ａが得られる。なお、磁気ギャ
ップ２５は、円形状凹部２３の深さを変更することで任
意の大きさに設定できる。As described above, as shown in FIG. 9, the inner space 20 composed of the circular concave groove 8 and the circular concave portion 23 surrounded by the circular disk-shaped core 3 with concave groove and the circular disk-shaped core 21 with concave portion is formed. An annular portion 7 of the disc-shaped core 3 with a groove and a circular portion 2 of the disc-shaped core 21 having the spiral coil conductor pattern 2.
2 and the surface 2 form a closed magnetic circuit, and a disk-shaped core 3 with a groove is formed.
The inductance element 1A having a magnetic gap (air gap) 25 between the end surface of the cylindrical portion 6 and the ceiling surface of the circular recess 23 of the disk-shaped core 21 is obtained. The magnetic gap 25 can be set to an arbitrary size by changing the depth of the circular recess 23.
【００２９】図１２乃至図１４は本発明の第３実施例を
示す。図１２は本実施例によって得られるインダクタン
ス素子１Ｂを示しており、該インダクタンス素子１Ｂは
前記第１実施例で示したスパイラル状コイル導体パター
ン２を有する第１の板状磁性コアとしての凹溝付き円板
状コア３と、第２の板状磁性コアとしての凹溝付き円板
状コア３１とを一体化したものである。この第３実施例
の場合も凹溝付き円板状コア３にスパイラル状コイル導
体パターン２をフォトエッチングで形成する工程は前述
の第１実施例と同じである。12 to 14 show a third embodiment of the present invention. FIG. 12 shows an inductance element 1B obtained according to this embodiment, which has a groove as a first plate-shaped magnetic core having the spiral coil conductor pattern 2 shown in the first embodiment. The disc-shaped core 3 and the disc-shaped core 31 with a groove as a second plate-shaped magnetic core are integrated. Also in the case of the third embodiment, the step of forming the spiral coil conductor pattern 2 on the disk-shaped core 3 with the concave groove by photoetching is the same as that of the first embodiment.
【００３０】前記凹溝付き円板状コア３１は、図１３及
び図１４に示すように、前記凹溝付き円板状コア３と同
径の円板の底面周縁部に円環状部３２を突設する如く底
面側に形成した円環状凹溝３３の中央に円柱状部３４を
突設した磁性コアであり、高抵抗フェライトを一体成型
して焼結したものである。前記円柱状部３４は、その端
面が円環状部３２の端面より低くなるように形成されて
いる。As shown in FIGS. 13 and 14, the disc-shaped core with concave groove 31 projects an annular portion 32 on the bottom peripheral portion of a disc having the same diameter as the disc-shaped core with concave groove 3. It is a magnetic core in which a cylindrical portion 34 is provided in the center of an annular recessed groove 33 formed on the bottom surface side as provided, and is formed by integrally molding and sintering high-resistance ferrite. The cylindrical portion 34 is formed so that its end surface is lower than the end surface of the annular portion 32.
【００３１】そして、円環状凹溝８を有する前記凹溝付
き円板状コア３の上面と円環状凹溝３３を有する前記凹
溝付き円板状コア３１の底面とを対向させ、凹溝付き円
板状コア３の円環状部７の端面と凹溝付き円板状コア３
１の円環状部３２の端面とを接面し、凹溝付き円板状コ
ア３と凹溝付き円板状コア３１とを接着等の固定手段で
固定一体化する。Then, the upper surface of the disk-shaped core 3 with the groove having the annular groove 8 and the bottom surface of the disk-shaped core 31 with the groove having the annular groove 33 are opposed to each other, and The end surface of the annular portion 7 of the disk-shaped core 3 and the disk-shaped core 3 with the concave groove
The end face of the annular portion 32 of No. 1 is in contact with the end face, and the disc-shaped core 3 with concave groove and the disc-shaped core 31 with concave groove are fixed and integrated by a fixing means such as bonding.
【００３２】以上により、図１２に示したように、凹溝
付き円板状コア３と凹溝付き円板状コア３１とで囲まれ
た円環状凹溝８及び凹溝３３からなる内部空間３０にス
パイラル状コイル導体パターン２を有し、凹溝付き円板
状コア３の円環状部７と凹溝付き円板状コア３１の円環
状部３２とが接面して閉磁路を構成し、凹溝付き円板状
コア３の円柱状部６端面と凹溝付き円板状コア３１の円
柱状部３４端面との間に磁気ギャップ（エアギャップ）
３５を有するインダクタンス素子１Ｂが得られる。な
お、磁気ギャップ３５は、円柱状部３４の高さを変更す
ることで任意の大きさに設定できる。As described above, as shown in FIG. 12, the internal space 30 composed of the annular groove 8 and the groove 33 surrounded by the disk-shaped core 3 with a groove and the disk-shaped core 31 with a groove. Has a spiral coil conductor pattern 2, and the annular portion 7 of the disk-shaped core 3 with concave groove and the annular portion 32 of the disk-shaped core 31 with concave groove are in contact with each other to form a closed magnetic circuit. A magnetic gap (air gap) is formed between the end surface of the cylindrical portion 6 of the disk-shaped core 3 with the groove and the end surface of the cylindrical portion 34 of the disk-shaped core 31 with the groove.
An inductance element 1B having 35 is obtained. The magnetic gap 35 can be set to any size by changing the height of the cylindrical portion 34.
【００３３】図１５乃至図２１は本発明の第４実施例を
示す。図１５は本実施例によって得られるインダクタン
ス素子１Ｃを示しており、該インダクタンス素子１Ｃ
は、角形スパイラル状コイル導体パターン４２を設けた
第１の板状磁性コアとしての凹溝付き角板状コア（極め
て薄型の角形ポットコア）４３と、第２の板状磁性コア
としての角板状コア４４とを一体化したものであり、以
下にこのインダクタンス素子１Ｃの製造方法を示す。15 to 21 show a fourth embodiment of the present invention. FIG. 15 shows an inductance element 1C obtained according to this embodiment.
Are rectangular plate cores with concave grooves (extremely thin rectangular pot cores) 43 as the first plate magnetic cores provided with the rectangular spiral coil conductor patterns 42, and rectangular plate cores as the second plate magnetic cores. This is integrated with the core 44, and the manufacturing method of the inductance element 1C will be described below.
【００３４】前記凹溝付き角板状コア４３は、図１６及
び図１７に示すように、正方形状の平板部４５の一面に
て、中央に角柱状部４６を、周縁部に環状部４７をそれ
ぞれ一体に有し、角柱状部４６と角形の環状部４７の間
に環状凹部４８が設けられた磁性コアであり、高抵抗フ
ェライトを一体成型して焼結したものである。前記角柱
状部４６及び環状部４７は、両者の端面が同一高さにな
るように形成し、前記環状凹部４８の幅は用途に応じた
所望のコイルパターンに対応させて任意の幅に設定す
る。なお、凹溝付き角板状コア４３は数mm程度の厚さと
し、環状凹部４８の深さは１００μｍ〜２００μｍ程度
としている。As shown in FIGS. 16 and 17, the square grooved core 43 with a groove has a square columnar portion 46 at the center and an annular portion 47 at the peripheral edge on one surface of a square flat plate portion 45. These are magnetic cores that are integrally formed with each other and have an annular recess 48 provided between a prismatic portion 46 and a rectangular annular portion 47, and are formed by integrally molding and sintering high-resistance ferrite. The prismatic portion 46 and the annular portion 47 are formed so that both end faces have the same height, and the width of the annular recessed portion 48 is set to an arbitrary width corresponding to a desired coil pattern according to the application. . The rectangular plate-shaped core 43 with a groove has a thickness of about several mm, and the annular recess 48 has a depth of about 100 μm to 200 μm.
【００３５】次に、前記第１実施例の図４で示したのと
同様に、前記凹溝付き角板状コア４３の環状凹部４８の
底面に導電性ペーストとしての銀ペーストを印刷し焼結
することで環状導電層を形成する。Next, as in the case of the first embodiment shown in FIG. 4, silver paste as a conductive paste is printed and sintered on the bottom surface of the annular recess 48 of the rectangular plate-shaped core 43 with the recessed groove. By doing so, an annular conductive layer is formed.
【００３６】それから、図１８及び図１９に示すよう
に、前記環状導電層にフォトエッチング法によるエッチ
ングを施し、環状凹部４８底面に所望の角形スパイラル
状コイル導体パターン４２をそれぞれ形成する。この工
程は、導体パターン形状が角形スパイラル状になる他は
前述した第１実施例と同様である。Then, as shown in FIGS. 18 and 19, the annular conductive layer is subjected to etching by a photoetching method to form desired spiral spiral coil conductor patterns 42 on the bottom surface of the annular recess 48, respectively. This step is the same as that of the above-described first embodiment except that the conductor pattern has a rectangular spiral shape.
【００３７】前記角板状コア４４は、図２０及び図２１
に示すように、前記凹溝付き角板状コア４３と平面形状
が同一の正方形状の平板状磁性コアであり、高抵抗フェ
ライトを一体成型して焼結したものである。The square plate-shaped core 44 is shown in FIGS.
As shown in (4), it is a square plate-shaped magnetic core having the same planar shape as the rectangular plate-shaped core 43 with concave grooves, and is made by integrally molding and sintering high-resistance ferrite.
【００３８】そして、前記環状凹部４８を有する凹溝付
き角板状コア４３の上面と前記角板状コア４４の底面と
を対向させ、角板状コア４４の底面に凹溝付き角板状コ
ア４３の角柱状部４６及び環状部４７の端面を接面し、
凹溝付き角板状コア４３と角板状コア４４とを接着等の
固定手段で固定一体化する。The upper surface of the rectangular plate-shaped core 43 with the groove having the annular recess 48 and the bottom surface of the rectangular plate-shaped core 44 are opposed to each other, and the rectangular plate-shaped core with the grooved groove is formed on the bottom surface of the rectangular plate-shaped core 44. The end faces of the prismatic portion 46 and the annular portion 47 of 43 are brought into contact with each other,
The rectangular plate-shaped core 43 with a groove and the rectangular plate-shaped core 44 are fixed and integrated by a fixing means such as bonding.
【００３９】以上により、図１５に示した如く、凹溝付
き角板状コア４３と角板状コア４４とで囲まれた環状凹
部４８からなる内部空間４０に角形スパイラル状コイル
導体パターン４２を有し、凹溝付き角板状コア４３の角
柱状部４６及び環状部４７の端面と角板状コア４４底面
とが接面して閉磁路が構成されたインダクタンス素子１
Ｃが得られる。As described above, as shown in FIG. 15, the rectangular spiral coil conductor pattern 42 is provided in the internal space 40 formed of the annular recess 48 surrounded by the rectangular plate-shaped core 43 with the concave groove and the rectangular plate-shaped core 44. Then, the inductance element 1 in which the end faces of the prismatic portion 46 and the annular portion 47 of the rectangular plate-shaped core 43 with the groove and the bottom face of the rectangular plate-shaped core 44 are in contact with each other to form a closed magnetic circuit.
C is obtained.
【００４０】なお、第４実施例で用いた角板状コア４４
の代わりに、図２２及び図２３の凹部付き角板状コア５
１を用いてもよい。この凹部付き角板状コア５１は、方
形平板の底面周縁部に環状部５２を突設する如く、底面
側に正方形状の凹部５３を形成したものであり、高抵抗
フェライトを一体成型して焼結したものである。この場
合、図１８及び図１９を示したコイル導体パターン４２
を形成した凹溝付き角板状コア４３の上面と、前記角板
状コア５１の底面とを対向させ、角板状コア５１の環状
部５２の端面と凹溝付き角板状コア４３の環状部４７の
端面とを接面し、凹溝付き角板状コア４３と角板状コア
５１とを接着等の固定手段で固定一体化すれば、凹溝付
き角板状コア４３の角柱状部４６端面と角板状コア５１
の凹部５３天井面との間に磁気ギャップ（エアギャッ
プ）を有するインダクタンス素子が得られる。なお、前
記磁気ギャップは、凹部５３の深さを変更することで任
意の大きさに設定できる。The square plate core 44 used in the fourth embodiment is used.
Instead of the square plate-shaped core 5 with concave portions shown in FIGS.
1 may be used. The rectangular plate-shaped core 51 with concave portions is formed by forming a square concave portion 53 on the bottom surface side so as to project an annular portion 52 on the peripheral edge portion of the bottom surface of a rectangular flat plate. It is a tied one. In this case, the coil conductor pattern 42 shown in FIGS.
The upper surface of the rectangular plate-shaped core 43 with concave grooves and the bottom surface of the rectangular plate-shaped core 51 are opposed to each other, and the end surface of the annular portion 52 of the rectangular plate-shaped core 51 and the annular plate of the rectangular plate-shaped core 43 with concave groove are formed. If the end face of the portion 47 is brought into contact with each other and the rectangular plate-shaped core 43 with concave groove and the rectangular plate-shaped core 51 are fixed and integrated by a fixing means such as adhesion, the prismatic portion of the rectangular plate-shaped core 43 with concave groove. 46 End Face and Square Plate Core 51
An inductance element having a magnetic gap (air gap) with the ceiling surface of the recess 53 is obtained. The magnetic gap can be set to any size by changing the depth of the recess 53.
【００４１】また、第４実施例で用いた角板状コア４４
の代わりに、図２４及び図２５の凹溝付き角板状コア６
１を用いてもよい。この凹溝付き角板状コア６１は、底
面周縁部に環状部６２を突設する如く、底面側に形成し
た正方形状の凹部６３の中央に角柱状部６４を突設した
ものであり、高抵抗フェライトを一体成型して焼結した
ものである。前記角柱状部６４は、その端面が環状部６
２の端面より低くなるように形成されている。この場
合、図１８及び図１９で示した凹溝付き角板状コア４３
の上面と、前記凹溝付き角板状コア６１の底面とを対向
させ、凹溝付き角板状コア６１の環状部６２の端面と凹
溝付き角板状コア４３の環状部４７の端面とを接面し、
凹溝付き角板状コア４３と凹溝付き角板状コア６１とを
接着等の固定手段で固定一体化すれば、凹溝付き角板状
コア４３の角柱状部４６端面と凹溝付き角板状コア６１
の角柱状部６４端面との間に磁気ギャップ（エアギャッ
プ）を有するインダクタンス素子が得られる。なお、前
記磁気ギャップは、角柱状部６４の高さを変更すること
で任意の大きさに設定できる。Also, the rectangular plate core 44 used in the fourth embodiment is used.
Instead of the square plate-shaped core 6 with concave grooves shown in FIGS.
1 may be used. The rectangular plate-shaped core 61 with a groove is such that a square columnar portion 64 is provided at the center of a square-shaped recess 63 formed on the bottom surface side like an annular portion 62 is provided at the peripheral portion of the bottom surface. The resistance ferrite is integrally molded and sintered. The end face of the prismatic portion 64 is the annular portion 6
It is formed so as to be lower than the end face of No. 2. In this case, the rectangular plate-shaped core 43 with the groove shown in FIGS.
And the bottom surface of the rectangular plate-shaped core 61 with concave grooves are opposed to each other, and the end surface of the annular portion 62 of the rectangular plate-shaped core 61 with concave grooves and the end surface of the annular portion 47 of the rectangular-plate-shaped core 43 with concave grooves are formed. Face the
If the rectangular plate-shaped core 43 with concave groove and the rectangular plate-shaped core 61 with concave groove are fixed and integrated by a fixing means such as bonding, the end face of the prismatic portion 46 of the rectangular plate-shaped core 43 with concave groove and the corner with concave groove. Plate-shaped core 61
An inductance element having a magnetic gap (air gap) with the end face of the prismatic portion 64 of is obtained. The magnetic gap can be set to an arbitrary size by changing the height of the prismatic portion 64.
【００４２】なお、前記各実施例では図示は省したが、
例えば、スパイラル状コイル導体パターン２，４２の両
端部にリード線を接続し、凹溝付き円板状、角板状コア
３，４３の環状部７，４７を横断する如く形成した溝か
ら前記リード線を引き出すことにより、スパイラル状コ
イル導体パターン２，４２の引き出し端を設けてもよ
い。Although not shown in the above embodiments,
For example, a lead wire is connected to both ends of the spiral coil conductor patterns 2 and 42, and the lead is formed from a groove formed so as to traverse the annular portions 7 and 47 of the disk-shaped concave groove-shaped core 3 and 43. The lead-out end of the spiral coil conductor patterns 2 and 42 may be provided by pulling out the wire.
【００４３】また、前記各実施例では、円形あるいは角
形の板状コア同士を一体化して構成していたが、インダ
クタンス素子の用途に応じて、他の形状（多角形）の板
状コアを同士を一体化する構成としてもよい。同様に、
コイル導体パターンを設けた第１の磁性コア側の凹溝あ
るいは柱状部、第２の板状磁性コア側の凹部あるいは柱
状部もインダクタンス素子の仕様に応じて適宜変更して
もよい。Further, in each of the above-mentioned embodiments, the circular or rectangular plate-shaped cores are integrated with each other. However, plate-shaped cores of other shapes (polygons) are combined with each other depending on the application of the inductance element. May be integrated. Similarly,
The groove or columnar portion on the side of the first magnetic core provided with the coil conductor pattern and the recessed portion or columnar portion on the side of the second plate-shaped magnetic core may be appropriately changed according to the specifications of the inductance element.
【００４４】図５及び図６または図１８及び図１９で示
したように、前記スパイラル状コイル導体パターン２，
４２は、環状凹溝８，４８の全幅を利用して周回形成さ
れているが、ターン数や線幅をインダクタンス素子の仕
様に応じて適宜変更してもよい。As shown in FIGS. 5 and 6 or FIGS. 18 and 19, the spiral coil conductor pattern 2,
Although 42 is formed so as to circulate using the entire widths of the annular recessed grooves 8 and 48, the number of turns and the line width may be appropriately changed according to the specifications of the inductance element.
【００４５】図２６乃至図３１は本発明の第５実施例で
あって、環状導電層と同時に凹溝付き円板状コアを貫通
するリード部を形成する場合を示す。図２６は本実施例
によって得られるトランス７１を示しており、該トラン
ス７１は一対のスパイラル状コイル導体パターン７２
Ａ，７２Ｂを設けた第１の板状磁性コアとしての凹溝付
き円板状コア７３と、前記第１実施例の図７及び図８で
示した第２の板状磁性コアとしての円板状コア４を一体
化したものであり、以下にこのトランス７１の製造方法
を示す。FIGS. 26 to 31 show a fifth embodiment of the present invention in which a lead portion penetrating a disk-shaped core with a groove is formed simultaneously with an annular conductive layer. FIG. 26 shows a transformer 71 obtained according to this embodiment. The transformer 71 includes a pair of spiral coil conductor patterns 72.
A disk-shaped core 73 with a groove as a first plate-shaped magnetic core provided with A and 72B, and a disk as the second plate-shaped magnetic core shown in FIGS. 7 and 8 of the first embodiment. The core 4 is integrated, and a method of manufacturing the transformer 71 will be described below.
【００４６】図２７及び図２８に示すように、凹溝付き
円板状コア７３の円形状の平板部７５の一面には、中央
に円柱状部７６が、周縁部に円環状部７７が、それぞれ
の端面が同一高さになるように突設され、円柱状部７６
及び円環状部７７の間に円環状凹部７８が形成されてい
る。この円環状凹部７８の幅は用途に応じた所望のコイ
ルパターンに対応させて任意の幅に設定する。また、円
環状凹部７８には、２対の貫通孔９１Ａ，９１Ｂ，９２
Ａ，９２Ｂが凹部底面から凹溝付き円板状コア７３裏面
まで貫通するように形成されている。なお、貫通孔９１
Ａ，９１Ｂ，９２Ａ，９２Ｂを設ける位置は、所望のコ
イル導体パターンの端部に位置するように設定する。As shown in FIGS. 27 and 28, on one surface of the circular flat plate portion 75 of the disk-shaped core 73 with concave groove, a cylindrical portion 76 is formed at the center, and an annular portion 77 is formed at the peripheral portion. Each end face is projected so as to have the same height, and the cylindrical portion 76
An annular recess 78 is formed between the annular recess 77 and the annular recess 77. The width of the annular recess 78 is set to an arbitrary width corresponding to a desired coil pattern according to the application. Further, the annular recess 78 has two pairs of through holes 91A, 91B, 92.
A and 92B are formed so as to penetrate from the bottom surface of the concave portion to the back surface of the disk-shaped core 73 with the concave groove. The through hole 91
The positions where A, 91B, 92A, and 92B are provided are set so as to be located at the ends of the desired coil conductor pattern.
【００４７】次に、図２９のように、前記凹溝付き円板
状コア７３の円環状凹部７８の底面に導電性ペーストと
しての銀ペーストを印刷し焼結することで円環状導電層
７９を形成する。すなわち、スクリーン印刷あるいはパ
ット印刷（転写による印刷）といった印刷方法により、
円環状凹部７８底面に銀ペーストを印刷し乾燥する工程
を数回繰り返した後焼結するか、あるいは印刷、焼結工
程を数回繰り返し行うことにより、所望の厚さの円環状
導電層７９を得る。その際、前記銀ペーストの印刷時に
貫通孔９１Ａ，９１Ｂ，９２Ａ，９２Ｂ内を凹溝付き円
板状コア７３の裏面から負圧源で吸引することにより、
銀ペーストは貫通孔９１Ａ，９１Ｂ，９２Ａ，９２Ｂ内
にも充填され、印刷後の焼結により円環状導電層７９と
一体となった２対の接続用リード部９３Ａ，９３Ｂ，９
４Ａ，９４Ｂがそれぞれ同時に形成される。Next, as shown in FIG. 29, a silver paste as a conductive paste is printed on the bottom surface of the annular concave portion 78 of the disk-shaped core 73 with concave grooves and sintered to form an annular conductive layer 79. Form. That is, by a printing method such as screen printing or pad printing (printing by transfer),
By repeating the step of printing the silver paste on the bottom surface of the annular recess 78 and drying several times and then sintering, or repeating the printing and sintering steps several times, the annular conductive layer 79 having a desired thickness is formed. obtain. At this time, when the silver paste is printed, the inside of the through-holes 91A, 91B, 92A, 92B is sucked from the back surface of the disk-shaped core 73 with concave grooves by a negative pressure source,
The silver paste is also filled in the through holes 91A, 91B, 92A, 92B, and two pairs of connecting lead portions 93A, 93B, 9 integrated with the annular conductive layer 79 by sintering after printing are formed.
4A and 94B are simultaneously formed.
【００４８】それから、図３０及び図３１に示すよう
に、前記円環状導電層７９にフォトエッチング法による
エッチングを施し、円環状凹部７８底面に所望の一対の
スパイラル状コイル導体パターン７２Ａ，７２Ｂをそれ
ぞれ形成する。前記スパイラル状コイル導体パターン７
２Ａは両端部が接続用リード部９３Ａ，９３Ｂに接続さ
れ、スパイラル状コイル導体パターン７２Ｂは両端部が
接続用リード部９４Ａ，９４Ｂに接続されている。この
エッチング工程は前述した第１実施例と同様である。Then, as shown in FIGS. 30 and 31, the annular conductive layer 79 is etched by a photo-etching method to form a desired pair of spiral coil conductor patterns 72A and 72B on the bottom surface of the annular recess 78, respectively. Form. The spiral coil conductor pattern 7
2A has both ends connected to the connection lead parts 93A and 93B, and both ends of the spiral coil conductor pattern 72B are connected to the connection lead parts 94A and 94B. This etching process is similar to that of the first embodiment described above.
【００４９】そして、前記円環状凹部７８を有する凹溝
付き円板状コア３７の上面と前記円板状コア４の底面と
を対向させ、円板状コア４の底面に凹溝付き円板状コア
７３の円柱状部７６及び円環状部７７の端面を接面し、
凹溝付き円板状コア７３と円板状コア４とを接着等の固
定手段で固定一体化する。The upper surface of the disk-shaped core 37 with the groove having the annular recess 78 and the bottom surface of the disk-shaped core 4 are opposed to each other, and the disk-shaped core 4 with the groove is formed on the bottom surface of the disk-shaped core 4. Contact the end faces of the cylindrical portion 76 and the annular portion 77 of the core 73,
The disk-shaped core 73 with a groove and the disk-shaped core 4 are fixed and integrated by a fixing means such as adhesion.
【００５０】以上により、図２６に示した如く、凹溝付
き円板状コア７３と円板状コア４とで囲まれた円環状凹
部７８からなる内部空間７０に一対のスパイラル状コイ
ル導体パターン７２Ａ，７２Ｂを有し、凹溝付き円板状
コア７３の円柱状部７６及び円環状部７７の端面と円板
状コア４底面とが接面して閉磁路が構成されたトランス
７１が得られる。As described above, as shown in FIG. 26, a pair of spiral coil conductor patterns 72A are provided in the internal space 70 formed by the disk-shaped core 73 with a groove and the ring-shaped recess 78 surrounded by the disk-shaped core 4. , 72B, and the end portion of the cylindrical portion 76 and the annular portion 77 of the disk-shaped core 73 with concave grooves and the bottom surface of the disk-shaped core 4 are in contact with each other to form a closed magnetic circuit. .
【００５１】以上の第５実施例の場合、凹溝付き円板状
コア７３に円環状凹部７８の底面から凹溝付き円板状コ
ア７３の裏面に貫通する貫通孔９１Ａ，９１Ｂ，９２
Ａ，９２Ｂを形成し、該貫通孔９１Ａ，９１Ｂ，９２
Ａ，９２Ｂの内部及び前記円環状凹部７８に導電性ペー
ストを印刷し焼結することで、円環状凹部７８底部の円
環状導電層７９と一体となった接続用リード部９３Ａ，
９３Ｂ，９４Ａ，９４Ｂを同時に簡単に形成することが
でき、該接続用リード部９３Ａ，９３Ｂ，９４Ａ，９４
Ｂを各々のスパイラル状コイル導体パターン７２Ａ，７
２Ｂの端部に接続する引出線として利用でき、各々のス
パイラル状コイル導体パターン７２Ａ，７２Ｂと凹溝付
き円板状コア７３裏面の端子（又は電極）とを各々の接
続用リード部９３Ａ，９３Ｂ，９４Ａ，９４Ｂで接続す
ることができる。その他の作用効果は、前述した第１実
施例と同様であり、トランスの小型化や薄型化を図るこ
とができる。In the case of the fifth embodiment described above, the through hole 91A, 91B, 92 penetrating from the bottom surface of the annular recess 78 to the back surface of the recessed disk-shaped core 73 in the recessed disk-shaped core 73.
A, 92B are formed and the through holes 91A, 91B, 92 are formed.
By printing and sintering a conductive paste inside the A and 92B and the annular recess 78, the connecting lead portion 93A integrated with the annular conductive layer 79 at the bottom of the annular recess 78,
93B, 94A, 94B can be easily formed at the same time, and the connecting lead portions 93A, 93B, 94A, 94 can be formed.
B is each spiral coil conductor pattern 72A, 7
It can be used as a lead wire to connect to the end of 2B, and each spiral coil conductor pattern 72A, 72B and the terminal (or electrode) on the back surface of the disk-shaped core 73 with a groove groove are connected to each lead portion 93A, 93B. , 94A, 94B. Other functions and effects are similar to those of the above-described first embodiment, and the size and thickness of the transformer can be reduced.
【００５２】なお、上記第５実施例では、前記貫通孔９
１Ａ，９１Ｂ，９２Ａ，９２Ｂを所望のコイルパターン
の端部に位置するように設けたが、コイルの中間に引き
出し端を設ける場合、貫通孔をコイルパターンの任意の
中間部に設け、スパイラル状コイルの中間に接続用リー
ド部を設けてもよい。また、コイルパターンとして、一
対のスパイラル状コイルを設ける構成としたが、コイル
の数はトランスの仕様に応じて適宜変更できる。同様
に、スパイラル状コイルの周回数や線幅もトランスの仕
様に応じて適宜変更できる。In the fifth embodiment, the through hole 9
1A, 91B, 92A, and 92B are provided so as to be positioned at the ends of the desired coil pattern. However, when the lead-out end is provided in the middle of the coil, a through hole is provided at any middle part of the coil pattern to form a spiral coil. You may provide a connection lead part in the middle of. Further, although a pair of spiral coils is provided as the coil pattern, the number of coils can be appropriately changed according to the specifications of the transformer. Similarly, the number of turns and the line width of the spiral coil can be appropriately changed according to the specifications of the transformer.
【００５３】また、上記第５実施例では、円環状凹部７
８を形成した凹溝付き円板状コア７３に対して、前記図
７及び図８で示した第１実施例と同様の円板状コア４を
接面一体化した構成としたが、円板状コア４の代わり
に、前記第２実施例で示した図１０及び図１１と同様の
凹部付き円板状コア２１や前記第３実施例で示した図１
３及び図１４と同様の凹溝付き円板状コア３１と一体化
する構成としてもよい。これらの場合、磁気ギャップを
有するトランスが得られる。同様に、前記第１乃至第４
実施例で示した凹溝付き円板状、角板状コアに貫通孔を
形成したものを用いてコイル導体パターン及び接続用リ
ード部を形成し、これと円板状、角形板状コアとの組み
合わせとしてもよい。すなわち、前記第１乃至第４実施
例において、スパイラル状コイル導体パターン２，４２
の両端部に接続用リード部を設けるために、環状凹溝
８，４８からコア裏面に達する貫通孔を設ける構成とし
てもよい。In the fifth embodiment, the annular recess 7
The disk-shaped core 73 with a groove having the groove 8 has the disk-shaped core 4 similar to that of the first embodiment shown in FIG. 7 and FIG. Instead of the core 4, the disk-shaped core 21 with a recess similar to that of FIGS. 10 and 11 shown in the second embodiment and FIG. 1 shown in the third embodiment.
3 and the disk-shaped core 31 with a groove similar to FIG. 14 may be integrated. In these cases, a transformer with a magnetic gap is obtained. Similarly, the first to fourth
The coiled conductor pattern and the connecting lead portion are formed by using the disc-shaped grooved disc-shaped core shown in the example and the through-hole formed in the prismatic core, and the disc-shaped and the rectangular plate-shaped cores. It may be a combination. That is, in the first to fourth embodiments, the spiral coil conductor patterns 2, 42
In order to provide the connecting lead portions at both ends of the core, through holes extending from the annular recessed grooves 8 and 48 to the core back surface may be provided.
【００５４】図３２は本発明の第６実施例を示す。この
場合、凹溝付き円板状又は角板状コア３，４３の一面に
設けた環状凹溝８，７８底部の環状導電層８５をエッチ
ングしてスパイラル状コイル８６を形成した後、スパイ
ラル状コイル８６の露出部分に腐食防止のためのメッキ
を施し、はんだ等のメッキ層８７を設けている。銀以外
の導電性ペーストで導電層８５を形成したときは、メッ
キ層８７が必要となる場合が多い。なお、凹溝付き円板
状、又は角板状コア３，４３等の全体構成は前述の第１
乃至第５実施例と同様である。FIG. 32 shows a sixth embodiment of the present invention. In this case, the spiral conductive coil 85 is formed by etching the annular conductive groove 85 at the bottom of the annular recessed grooves 8 and 78 provided on one surface of the disk-shaped or rectangular plate-shaped cores 3 and 43 with recessed grooves, and then forming the spiral coil 86. The exposed portion of 86 is plated to prevent corrosion, and a plated layer 87 of solder or the like is provided. When the conductive layer 85 is formed of a conductive paste other than silver, the plated layer 87 is often required. The overall structure of the disk-shaped or groove-shaped cores 3, 43 with a groove is the same as the first
The same as the fifth embodiment.
【００５５】以上本発明の実施例について説明してきた
が、本発明はこれに限定されることなく請求項の記載の
範囲内において各種の変形、変更が可能なことは当業者
には自明であろう。Although the embodiment of the present invention has been described above, it is obvious to those skilled in the art that the present invention is not limited to this and various modifications and changes can be made within the scope of the claims. Let's do it.
【００５６】[0056]
【発明の効果】以上説明したように、本発明のコイル装
置の製造方法によれば、相互に一体化される第１の板状
磁性コアと第２の板状磁性コアとで構成される内部空間
にコイルを配する場合において、前記第１の板状磁性コ
アの一面に前記内部空間の少なくとも一部を構成する凹
部を設け、該凹部に導電性ペーストを印刷し焼結するこ
とにより導電層を形成し、エッチングにより該導電層で
コイル導体パターンを形成するようにしたので、コイル
となる導体パターンの巻き数や線幅等を自在に設定可能
であり、コイルの小型化又は高密度化が可能になる。ま
た、前記導電層は導電性ペーストの印刷焼結を繰り返す
ことにより、所望の厚さに形成できるため、電流容量の
大きいコイルを形成することができる。さらに、工程の
自動化が可能であって量産に適し、製造コストも低減で
きる。従って、小型、薄型化に適し、しかも電流容量の
大きい安価なコイル装置を得ることができる。As described above, according to the method for manufacturing the coil device of the present invention, the interior made up of the first plate-shaped magnetic core and the second plate-shaped magnetic core which are integrated with each other. In the case of arranging a coil in a space, a concave portion forming at least a part of the internal space is provided on one surface of the first plate-shaped magnetic core, and a conductive paste is printed in the concave portion and sintered to form a conductive layer. Since the coil conductor pattern is formed with the conductive layer by etching, it is possible to freely set the number of turns, the line width, etc. of the conductor pattern to be the coil, and to reduce the size or density of the coil. It will be possible. Further, since the conductive layer can be formed to have a desired thickness by repeating printing and sintering of the conductive paste, a coil having a large current capacity can be formed. Further, the process can be automated, suitable for mass production, and the manufacturing cost can be reduced. Therefore, it is possible to obtain an inexpensive coil device that is suitable for downsizing and thinning and has a large current capacity.
【図１】本発明に係るコイル装置の製造方法の第１実施
例で得られるインダクタンス素子を示す正断面図であ
る。FIG. 1 is a front sectional view showing an inductance element obtained in a first embodiment of a method for manufacturing a coil device according to the present invention.
【図２】第１実施例で用いる第１の板状磁性コアとして
の凹溝付き円板状コアを示す平面図である。FIG. 2 is a plan view showing a disk-shaped core with a groove as a first plate-shaped magnetic core used in the first embodiment.
【図３】同正断面図である。FIG. 3 is a front sectional view of the same.
【図４】凹溝付き円板状コアの円環状凹部の底面に導電
性ペーストを印刷し、焼結して円環状導電層を形成する
工程を示す正断面図である。FIG. 4 is a front cross-sectional view showing a step of printing a conductive paste on the bottom surface of an annular recess of a disk-shaped core with a groove and sintering the paste to form an annular conductive layer.
【図５】円環状導電層にフォトエッチングを施して凹溝
付き円板状コアの円環状凹部の底面にスパイラル状コイ
ルを形成する工程を示す正断面図である。FIG. 5 is a front cross-sectional view showing a step of performing photoetching on the annular conductive layer to form a spiral coil on the bottom surface of the annular recess of the disk-shaped core with a groove.
【図６】同平面図である。FIG. 6 is a plan view of the same.
【図７】第１実施例で用いる第２の板状磁性コアとして
の円板状コアを示す平面図である。FIG. 7 is a plan view showing a disk-shaped core as a second plate-shaped magnetic core used in the first embodiment.
【図８】同正断面図である。FIG. 8 is a front sectional view of the same.
【図９】本発明の第２実施例で得られるインダクタンス
素子を示す正断面図である。FIG. 9 is a front sectional view showing an inductance element obtained in a second embodiment of the present invention.
【図１０】第２実施例で用いる第２の板状磁性コアとし
ての凹部付き円板状コアを示す底面図である。FIG. 10 is a bottom view showing a disk-shaped core with recesses as a second plate-shaped magnetic core used in the second embodiment.
【図１１】同正断面図である。FIG. 11 is a front sectional view of the same.
【図１２】本発明の第３実施例で得られるインダクタン
ス素子を示す正断面図である。FIG. 12 is a front sectional view showing an inductance element obtained in the third embodiment of the present invention.
【図１３】第３実施例で用いる第２の板状磁性コアとし
ての凹溝付き円板状コアを示す底面図である。FIG. 13 is a bottom view showing a disk-shaped core with a groove as a second plate-shaped magnetic core used in the third embodiment.
【図１４】同正断面図である。FIG. 14 is a front sectional view of the same.
【図１５】本発明の第４実施例で得られるインダクタン
ス素子を示す正断面図である。FIG. 15 is a front sectional view showing an inductance element obtained in the fourth embodiment of the present invention.
【図１６】第４実施例で用いる第１の板状磁性コアとし
ての凹溝付き角板状コアを示す平面図である。FIG. 16 is a plan view showing a square plate-shaped core with a groove as a first plate-shaped magnetic core used in the fourth embodiment.
【図１７】同正断面図である。FIG. 17 is a front sectional view of the same.
【図１８】環状導電層にフォトエッチングを施して凹溝
付き角板状コアの環状凹部の底面に角形スパイラル状コ
イルを形成する工程を示す正断面図である。FIG. 18 is a front cross-sectional view showing a step of performing photoetching on the annular conductive layer to form a rectangular spiral coil on the bottom surface of the annular recess of the rectangular plate-shaped core with a groove.
【図１９】同平面図である。FIG. 19 is a plan view of the same.
【図２０】第４実施例で用いる第２の板状磁性コアとし
ての平板状コアを示す底面図である。FIG. 20 is a bottom view showing a flat plate-shaped core as a second plate-shaped magnetic core used in the fourth embodiment.
【図２１】同正断面図である。FIG. 21 is a front sectional view of the same.
【図２２】第４実施例の第２の板状磁性コアとして使用
可能な凹部付き角板状コアを示す底面図である。FIG. 22 is a bottom view showing a square plate core with recesses that can be used as the second plate magnetic core of the fourth embodiment.
【図２３】同正断面図である。FIG. 23 is a front sectional view of the same.
【図２４】第４実施例の第２の板状磁性コアとして使用
可能な凹溝付き角板状コアを示す底面図である。FIG. 24 is a bottom view showing a square plate-shaped core with a groove that can be used as a second plate-shaped magnetic core of the fourth embodiment.
【図２５】同正断面図である。FIG. 25 is a front sectional view of the same.
【図２６】本発明の第５実施例で得られるトランスを示
す正断面図である。FIG. 26 is a front sectional view showing a transformer obtained in a fifth embodiment of the present invention.
【図２７】第５実施例で用いる第１の板状磁性コアとし
ての凹溝付き円板状コアを示す平面図である。FIG. 27 is a plan view showing a disk-shaped core with a groove as a first plate-shaped magnetic core used in the fifth embodiment.
【図２８】同正断面図である。FIG. 28 is a front sectional view of the same.
【図２９】凹溝付き円板状コアの円環状凹部の底面に導
電性ペーストを印刷し、焼結して円環状導電層を形成す
るとともに、貫通孔内にリード部を形成する工程を示す
正断面図である。FIG. 29 shows a step of printing a conductive paste on the bottom surface of an annular recess of a disk-shaped core with a groove and sintering the paste to form an annular conductive layer and a lead portion in the through hole. FIG.
【図３０】円環状導電層にフォトエッチングを施して凹
溝付き円板状コアの円環状凹部の底面にスパイラル状コ
イルを形成する工程を示す正断面図である。FIG. 30 is a front cross-sectional view showing a step of performing photoetching on the annular conductive layer to form a spiral coil on the bottom surface of the annular recess of the disk-shaped core with a groove.
【図３１】同平面図である。FIG. 31 is a plan view of the same.
【図３２】本発明の第６実施例であって、スパイラル状
コイル上にメッキ層を設ける工程を示す部分拡大断面図
である。FIG. 32 is a partial enlarged cross-sectional view showing a step of providing a plating layer on the spiral coil according to the sixth embodiment of the present invention.
１，１Ａ，１Ｂ，１Ｃ インダクタンス素子 ２，７２Ａ，７２Ｂ スパイラル状コイル導体パターン ３，３１，７３ 凹溝付き円板状コア ４ 円板状コア ５，４５，７５ 平板部 ６，７６ 円柱状部 ７，７７ 円環状部 ８，７８ 円環状凹溝 ９，７９ 円環状導電層 １０，２０，３０，４０，７０ 内部空間 ２１ 凹部付き円板状コア ４２ 角形スパイラル状コイル導体パターン ４３，６１ 凹溝付き角板状コア ４４ 角板状コア ４６ 角柱状部 ４７ 環状部 ４８ 環状凹溝 ５１ 凹部付き角板状コア ８７ メッキ層 ９１Ａ，９１Ｂ，９２Ａ，９２Ｂ 貫通孔 ９３Ａ，９３Ｂ，９４Ａ，９４Ｂ 接続用リード部 1, 1A, 1B, 1C Inductance element 2, 72A, 72B Spiral coil conductor pattern 3, 31, 73 Disc-shaped core with concave groove 4 Disc-shaped core 5, 45, 75 Flat plate portion 6, 76 Cylindrical portion 7 , 77 annular portion 8, 78 annular concave groove 9, 79 annular conductive layer 10, 20, 30, 40, 70 internal space 21 concave disk-shaped core 42 square spiral coil conductor pattern 43, 61 with concave groove Square plate core 44 Square plate core 46 Square column part 47 Annular part 48 Annular recess groove 51 Square plate core with recess 87 Plating layer 91A, 91B, 92A, 92B Through hole 93A, 93B, 94A, 94B Connection lead part
Claims (3)
と第２の板状磁性コアとで構成される内部空間にコイル
を配したコイル装置の製造方法において、 前記第１の板状磁性コアの一面に前記内部空間の少なく
とも一部を構成する凹部を設け、該凹部に導電性ペース
トを印刷し焼結することにより導電層を形成し、エッチ
ングにより該導電層でコイル導体パターンを形成するこ
とを特徴とするコイル装置の製造方法。1. A method of manufacturing a coil device, wherein a coil is arranged in an internal space composed of a first plate-shaped magnetic core and a second plate-shaped magnetic core, which are integrated with each other, wherein the first plate is provided. A concave portion forming at least a part of the internal space is provided on one surface of the magnetic core, a conductive layer is formed by printing and sintering a conductive paste in the concave portion, and a coil conductor pattern is formed on the conductive layer by etching. A method for manufacturing a coil device, comprising forming the coil device.
面から当該磁性コアの裏面に貫通する貫通孔を有してお
り、該貫通孔の内部及び前記凹部に導電性ペーストを印
刷し焼結することにより前記導電層を形成する請求項１
記載のコイル装置の製造方法。2. The first plate-shaped magnetic core has a through hole penetrating from the bottom surface of the recess to the back surface of the magnetic core, and a conductive paste is printed inside the through hole and in the recess. The conductive layer is formed by sintering.
A method for manufacturing the described coil device.
請求項１又は２記載のコイル装置の製造方法。3. The method for manufacturing a coil device according to claim 1, wherein the conductive paste is a silver paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29737793A JPH07130541A (en) | 1993-11-02 | 1993-11-02 | Manufacture of coil device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29737793A JPH07130541A (en) | 1993-11-02 | 1993-11-02 | Manufacture of coil device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07130541A true JPH07130541A (en) | 1995-05-19 |
Family
ID=17845704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29737793A Pending JPH07130541A (en) | 1993-11-02 | 1993-11-02 | Manufacture of coil device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07130541A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013504891A (en) * | 2009-09-16 | 2013-02-07 | マラディン テクノロジーズ リミテッド | Micro-coil device and manufacturing method thereof |
| US9153547B2 (en) | 2004-10-27 | 2015-10-06 | Intel Corporation | Integrated inductor structure and method of fabrication |
-
1993
- 1993-11-02 JP JP29737793A patent/JPH07130541A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9153547B2 (en) | 2004-10-27 | 2015-10-06 | Intel Corporation | Integrated inductor structure and method of fabrication |
| JP2013504891A (en) * | 2009-09-16 | 2013-02-07 | マラディン テクノロジーズ リミテッド | Micro-coil device and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4103267A (en) | Hybrid transformer device | |
| JP2004128506A (en) | Stacked coil component and its manufacturing method | |
| KR20010085376A (en) | Multilayer inductor | |
| JPS60214510A (en) | Electronic part | |
| US5900797A (en) | Coil assembly | |
| JPH06333742A (en) | Laminated coil | |
| JPH056829A (en) | Thin transformer | |
| JPH07130541A (en) | Manufacture of coil device | |
| JP3225637B2 (en) | Chip type choke coil | |
| JP2002203718A (en) | Laminated common mode choke coil | |
| JPH0732908U (en) | electromagnet | |
| CN110415940B (en) | Integrated transformer and electronic device | |
| JPH06260342A (en) | Surface-mount type coil component | |
| JP2539613Y2 (en) | Chip inductor | |
| JP2008130942A (en) | Method for manufacturing winding type electronic component | |
| JPH07192925A (en) | Bead inductor | |
| JPH02256214A (en) | Chip inductor and its manufacture | |
| JPH09148135A (en) | Coil component | |
| JPH08264320A (en) | Chip inductor array | |
| JPH08293417A (en) | Printed coil component and printed coil board | |
| JPH07320939A (en) | Inductance component and manufacture thereof | |
| JP2003197430A (en) | Laminated type sheet coil and transformer | |
| JPH03159206A (en) | Structure of hybrid integrated circuit part | |
| JPH0555062A (en) | Choke coil and fabrication thereof | |
| JPH05175060A (en) | Chip-shaped transformer and its manufacture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20030924 |