JP6241090B2 - coil - Google Patents

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JP6241090B2
JP6241090B2 JP2013131571A JP2013131571A JP6241090B2 JP 6241090 B2 JP6241090 B2 JP 6241090B2 JP 2013131571 A JP2013131571 A JP 2013131571A JP 2013131571 A JP2013131571 A JP 2013131571A JP 6241090 B2 JP6241090 B2 JP 6241090B2
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sheet
base material
coil
conductor path
bent
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JP2015005694A (en
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工藤 和秀
和秀 工藤
直也 穂坂
直也 穂坂
雅司 大室
雅司 大室
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Murata Manufacturing Co Ltd
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Description

本発明は、導体路が巻かれて構成されるコイルに関するものである。 The present invention relates to a configured coil and conductor is wound.

従来この種のコイルとしては、例えば、特許文献1に開示された折り曲げコイルがある。この折り曲げコイルは、電気絶縁性および可撓性を有したシート状基板が曲げ軸で折り曲げられて構成される。シート状基板の片面には、曲げ軸に対して、1つのパターンの端部の曲げ軸方向の位置と、隣接するパターンの別の端部の曲げ軸方向の位置とが一致するパターンで、多数の導電体が一定の間隔をおいて形成されている。このシート状基板が、導電体が形成された面を内側にして曲げ軸で曲げられ、互いに重なる導電体の端部が半田からなる接合材によって接合されることで、連続した導体路が形成されてヘリカル型巻線コイルが構成される。   Conventionally, as this type of coil, for example, there is a bending coil disclosed in Patent Document 1. This bending coil is configured by bending a sheet-like substrate having electrical insulation and flexibility with a bending axis. On one side of the sheet-like substrate, there are many patterns in which the position of the end of one pattern in the direction of the bending axis matches the position of the other end of the adjacent pattern in the direction of the bending axis with respect to the bending axis. Are formed at regular intervals. This sheet-like substrate is bent by a bending axis with the surface on which the conductor is formed inside, and the ends of the conductors that overlap each other are bonded by a bonding material made of solder, thereby forming a continuous conductor path. Helical winding coils are constructed.

また、従来、この種のコイルとして、例えば、特許文献2に開示されたボビンコイルもある。このボビンコイルは、絶縁フィルムが円筒状に湾曲されて構成される。絶縁フィルム上には、その対向する2辺に沿って複数の導体の各両端が配置され、かつ、一定のピッチで互いに隔たるように配設されて、導体列が形成されている。この絶縁フィルムが、導体列が略螺旋状に一列に繋がるように対向する2辺が合わされて円筒状に湾曲され、一方の辺に位置する導体の端部が他方の辺に位置する隣列する導体の端部に電気的に接続されることで、空芯コイル体が構成される。   Conventionally, as this type of coil, for example, there is a bobbin coil disclosed in Patent Document 2. The bobbin coil is configured by bending an insulating film into a cylindrical shape. On the insulating film, both ends of the plurality of conductors are disposed along the two opposing sides, and are arranged so as to be separated from each other at a constant pitch, thereby forming a conductor row. This insulating film is curved in a cylindrical shape with two opposite sides being combined so that the conductor rows are connected in a row in a substantially spiral shape, and the end of the conductor located on one side is adjacent to the other side. An air-core coil body is configured by being electrically connected to the end of the conductor.

特開平11−265813号公報Japanese Patent Laid-Open No. 11-265813 特開2002−93649号公報JP 2002-93649 A

しかしながら、上記従来の特許文献1および特許文献2に開示されたいずれのコイルにおいても、複数の導電体を接合材によって接合することで、巻線状の導体路を形成している。このため、上記従来のいずれのコイルも、導電体を接合材によって接合する工程が必須となり、製品価格の低廉化を図ることができない。また、導電体の接続部が多数存在するため、コイルの製品としての接続部信頼性の低下を招く可能性が高い。従って、上記従来の各コイルは、導電体の一つ一つの各接続部の接続信頼性を向上させる構造もしくは製法がさらに必要となり、製品価格の上昇は免れ得ない。   However, in any of the coils disclosed in Patent Document 1 and Patent Document 2 described above, a winding conductor path is formed by joining a plurality of conductors with a joining material. For this reason, in any of the conventional coils described above, the step of joining the conductors with the joining material is essential, and the product price cannot be reduced. In addition, since there are a large number of conductor connection portions, there is a high possibility that the reliability of the connection portion as a coil product will be lowered. Therefore, each of the conventional coils further requires a structure or manufacturing method for improving the connection reliability of each connection portion of each conductor, and an increase in product price cannot be avoided.

本発明はこのような課題を解決するためになされたもので、
幅方向において所定のパターンで振幅し、長さ方向において前記パターンが所定回数周期的に繰り返される単一の導体路が電気絶縁性を有するシート上に形成され、厚み方向において、前記パターンが繰り返される周期でシートが曲げられて、導体路が巻かれて構成され、
シートの曲がりに嵌合する凹凸形状を一面に有する基材を備え、
導体路が、その巻き始めおよび巻き終わりのシート両端部上に電極パットを備え、
シートが、基材の両側部を覆って基材の底面側に両端部が曲げ返され、内側に折り返された両端部上の電極パットを基材の底面に露出させて曲げられる
コイルを構成した。
The present invention has been made to solve such problems,
A single conductor path having a predetermined pattern in the width direction and periodically repeating the pattern a predetermined number of times in the length direction is formed on the sheet having electrical insulation, and the pattern is repeated in the thickness direction. The sheet is bent at a period, and the conductor path is wound ,
Provided with a base material having an uneven shape that fits into the bend of the sheet on one side,
The conductor track has electrode pads on both ends of the sheet at the start and end of winding,
The sheet covers both side portions of the base material, and both end portions are bent back to the bottom surface side of the base material, and the electrode pads on both end portions folded inward are exposed and exposed to the bottom surface of the base material. A coil was constructed.

本構成によれば、単一の導体路が形成されたシートが単に曲げられことで、シート上に形成された導体路が巻かれて、コイルが形成される。従って、従来のコイルのように、複数の導電体を接続してコイルを構成する導体路を形成する必要がなくなる。このため、導電体の接続部を備えること無く、巻線型コイルに似た巻き構造のコイルを形成することが可能になる。この結果、導電体を接合する工程が不要となってコイル製品価格の低廉化を図りながら、接続部信頼性の低下を招くことのない、巻線型コイルに似た巻き構造のコイルを簡単に提供することができる。   According to this configuration, the sheet on which the single conductor path is formed is simply bent, so that the conductor path formed on the sheet is wound and a coil is formed. Therefore, it is not necessary to form a conductor path constituting the coil by connecting a plurality of conductors as in the conventional coil. For this reason, it is possible to form a coil having a winding structure similar to a wound coil without providing a connection portion of a conductor. As a result, it is easy to provide a coil with a winding structure similar to a wound coil without reducing the coil product price by eliminating the need to join the conductors and reducing the reliability of the connection part. can do.

本構成によれば、シートの曲げ形状が、シートの曲がりに嵌合する凹凸形状を一面に有する基材によって保たれ、強度が確保されるので、コイルの製品取り扱い性が向上する According to this configuration, the bending shape of the sheet is maintained by the base material having the uneven shape fitted to the bending of the sheet on one side, and the strength is ensured, so that the product handleability of the coil is improved .

本構成によれば、導体路の巻き始めおよび巻き終わりに導体路に一体に形成された電極パットが基材の底面に露出し、外部電極を構成する。このため、導電体の接続部を全く有すること無く、コイルに外部電極を備えることができ、外部電極を備えた巻き構造のコイルを安価にかつ接続信頼性高く提供することができる。また、基材の両側部で導体路が曲げ返されることで、コイルの長さ方向に外部電極形成のための寸法を取る必要がなくなり、コイルの長さ方向を全て巻線形成に使用することができる。このため、同外形寸法および同構成材料のコイルにおけるインダクタンス取得効率を上げることができる。   According to this configuration, the electrode pads formed integrally with the conductor path at the start and end of winding of the conductor path are exposed on the bottom surface of the base material, and constitute the external electrode. For this reason, an external electrode can be provided in a coil, without having any connection part of a conductor, and the coil of the winding structure provided with the external electrode can be provided cheaply and with high connection reliability. Also, since the conductor track is bent back on both sides of the base material, it is not necessary to take the dimensions for forming the external electrodes in the length direction of the coil, and the entire length direction of the coil must be used for winding formation. Can do. For this reason, the inductance acquisition efficiency in the coil of the same outer dimension and the same constituent material can be increased.

また、本発明は、
幅方向において所定のパターンで振幅し、長さ方向において前記パターンが所定回数周期的に繰り返される単一の導体路が電気絶縁性を有するシート上に形成され、厚み方向において、前記パターンが繰り返される周期でシートが曲げられて、導体路が巻かれて構成され、
シートの周囲を囲む基材、または、シートの曲がりに嵌合する凹凸形状を一面に有する基材、または、シートの曲がりに下方から嵌合する凹凸形状を一面に有する下側基材およびシートの曲がりに上方から嵌合する凹凸形状を一面に有する上側基材からなる基材と、
基材の側面に露出する導体路の巻き始めおよび巻き終わりに電気的に接続され、基材の側面一面に形成される外部電極を備える
コイルを構成した。
The present invention also provides:
A single conductor path having a predetermined pattern in the width direction and periodically repeating the pattern a predetermined number of times in the length direction is formed on the sheet having electrical insulation, and the pattern is repeated in the thickness direction. The sheet is bent at a period, and the conductor path is wound,
A base material that surrounds the periphery of the sheet, a base material that has a concave and convex shape that fits into the curvature of the sheet, or a lower base material and sheet that has a concave and convex shape that fits into the curvature of the sheet from below. A base material composed of an upper base material having a concave and convex shape that fits from above into a bend; and
It is electrically connected to the winding start and winding end of the conductive paths exposed at the side surface of the substrate, and an external electrode formed on one surface side of the substrate
A coil was constructed.

本構成によれば、基材の側面に露出する導体路の巻き始めおよび巻き終わりにだけ外部電極を接続することで、基材の側面一面に外部電極を備える巻き構造のコイルを構成することができる。このため、導電体の接続箇所が2箇所で、接続信頼性の低下を招くことの懸念が極めて少ない、外部電極を備えた巻き構造のコイルを安価にかつ接続信頼性高く提供することができる。
本構成によれば、シートの曲げ形状が基材によって保たれ、強度が確保されるので、コイルの製品取り扱い性が向上する。
本構成によれば、コイルの長さ方向に外部電極形成のための寸法を取る必要がなくなり、コイルの長さ方向を全て巻線形成に使用することができる。このため、同外形寸法および同構成材料のコイルにおけるインダクタンス取得効率を上げることができる。
According to this configuration, it is possible to configure a coil having a wound structure including an external electrode on one side surface of the base material by connecting the external electrode only at the start and end of winding of the conductor path exposed on the side surface of the base material. it can. For this reason, it is possible to provide a coil having a wound structure including the external electrode at low cost and with high connection reliability, with only two conductor connection points and very little fear of causing a decrease in connection reliability.
According to this configuration, the bending shape of the sheet is maintained by the base material and the strength is ensured, so that the coil product handling property is improved.
According to this structure, it is not necessary to take the dimension for external electrode formation in the length direction of a coil, and all the length directions of a coil can be used for winding formation. For this reason, the inductance acquisition efficiency in the coil of the same outer dimension and the same constituent material can be increased.

また、本発明は、基材が、非磁性体または磁性体からなることを特徴とする。   Further, the present invention is characterized in that the substrate is made of a nonmagnetic material or a magnetic material.

本構成によれば、基材が非磁性体からなる場合には基材の透磁率が小さくなり、インダクタンスを低く抑えることができるので、高周波用途の巻き構造コイルが提供される。また、基材が磁性体からなる場合には基材の透磁率が大きくなるので、用いる磁性体の種類を選択することで、所望の大きさのインダクタンスを有する巻き構造コイルが得られる。   According to this configuration, when the base material is made of a non-magnetic material, the magnetic permeability of the base material becomes small and the inductance can be kept low, so that a wound structure coil for high frequency applications is provided. Moreover, since the magnetic permeability of a base material becomes large when the base material is made of a magnetic material, a wound structure coil having a desired magnitude of inductance can be obtained by selecting the type of magnetic material to be used.

本発明によれば、上記のように、導電体を接合する工程が不要となってコイル製品価格の低廉化を図りながら、接続部信頼性の低下を招くことのない、巻線型コイルに似た巻き構造のコイルを簡単に提供することができる。   According to the present invention, as described above, it is similar to a wound coil that does not require a process of joining conductors and reduces the coil product price, and does not cause a decrease in reliability of the connection portion. A coil having a winding structure can be easily provided.

本発明の一実施の形態によるコイルの外観斜視図である。1 is an external perspective view of a coil according to an embodiment of the present invention. 図1に示すコイルを構成する下側基材および上側基材の外観斜視図である。It is an external appearance perspective view of the lower side base material and upper side base material which comprise the coil shown in FIG. 図1に示すコイルを構成するシートが折り曲げられる前の平面図である。It is a top view before the sheet | seat which comprises the coil shown in FIG. 1 is bent. 図3に示すシート上に形成された導体路のパターン周期を説明するための模式図である。It is a schematic diagram for demonstrating the pattern period of the conductor path formed on the sheet | seat shown in FIG. 図3に示すシートが折り曲げられた状態の斜視図である。FIG. 4 is a perspective view of a state in which the sheet illustrated in FIG. 3 is bent. 一実施の形態の変形例によるコイルに用いられるシートの折り曲げ状態を示す斜視図である。It is a perspective view which shows the bending state of the sheet | seat used for the coil by the modification of one embodiment. 図6に示すシートを用いた一実施の形態の変形例によるコイルの外観斜視図である。It is an external appearance perspective view of the coil by the modification of one Embodiment using the sheet | seat shown in FIG. 一実施の形態の他の変形例によるコイルの構造を示す外観斜視図である。It is an external appearance perspective view which shows the structure of the coil by the other modification of one Embodiment. 図8に示す構造のコイルが得られるマザー基板の側面図である。It is a side view of the mother board | substrate from which the coil of the structure shown in FIG. 8 is obtained.

次に、本発明の一実施の形態によるコイルおよびその製造方法について、説明する。   Next, a coil and a manufacturing method thereof according to an embodiment of the present invention will be described.

図1は、本実施の形態によるコイル1の外観斜視図である。   FIG. 1 is an external perspective view of a coil 1 according to the present embodiment.

コイル1は、非磁性体または磁性体からなる下側基材2および上側基材3と、電気絶縁性を有するシート4とを備えて構成されており、幅W,長さL,厚みtの直方体状をしている。下側基材2は、その外観が図2(b)に示されるラック歯車状をしており、底面2aに対向する一面2bに、シート4の矩形状の曲がりに下方から嵌合する凹凸形状をコイル1の巻き数分有する。上側基材3は、その外観が図2(a)に示され、上面3aに対向する一面3bに、シート4の矩形状の曲がりに上方から嵌合する凹凸形状をコイル1の巻き数分有する。また、上側基材3は、下側基材2の両側部2c,2cを覆って山面3c,3cが下側基材2の底面2aと並ぶ凸部3d,3dを両端部に備えている。これら凸部3d,3dは、基材中央部に形成された凸部よりも大きなものとなっている。下側基材2の長さは、これら凸部3d,3dの分、上側基材3の長さよりも短くなっている。シート4は、エポキシ、ポリイミドなどの樹脂や、セラミック等の材質からなり、これら下側基材2および上側基材3の各凹凸形状部間に挟まれて、設けられている。   The coil 1 includes a lower base material 2 and an upper base material 3 made of a nonmagnetic material or a magnetic material, and a sheet 4 having electrical insulation, and has a width W, a length L, and a thickness t. It has a rectangular parallelepiped shape. The lower base material 2 has a rack gear shape whose external appearance is shown in FIG. 2 (b), and has an uneven shape that fits from below into a rectangular bend of the sheet 4 on one surface 2b facing the bottom surface 2a. Has the number of turns of the coil 1. The external appearance of the upper base material 3 is shown in FIG. 2A, and the surface 3b facing the upper surface 3a has an uneven shape that fits from above into the rectangular bend of the sheet 4 for the number of turns of the coil 1. . Further, the upper base material 3 includes convex portions 3d and 3d at both ends so as to cover both side portions 2c and 2c of the lower base material 2 and the crest surfaces 3c and 3c are aligned with the bottom surface 2a of the lower base material 2. . These convex parts 3d and 3d are larger than the convex part formed in the base-material center part. The length of the lower base material 2 is shorter than the length of the upper base material 3 by the amount of the convex portions 3d and 3d. The sheet 4 is made of a resin such as epoxy or polyimide, or a material such as ceramic, and is provided between the concave and convex portions of the lower base material 2 and the upper base material 3.

図3は、シート4が折り曲げられる前の平面図である。シート4上には単一の導体路5が、銅、銀などの一般的な内部電極材料を用いて、印刷法やリソグラフィー技術などの一般的な電極形成法によって形成されている。この導体路5は、コイル1の幅W方向において、所定の台形波状パターンで振幅し、コイル1の長さL方向において、この台形波状パターンがコイル1の巻き数に相当する所定回数周期的に繰り返されて、ミアンダ形状に形成されている。このシート4が、図1に示すように、厚みt方向において、台形波状パターンが繰り返される1周期を1周期とする周期で折り曲げられることで、導体路5は巻き線形状を呈する。   FIG. 3 is a plan view before the sheet 4 is bent. A single conductor path 5 is formed on the sheet 4 by a general electrode forming method such as a printing method or a lithography technique using a general internal electrode material such as copper or silver. The conductor path 5 is oscillated with a predetermined trapezoidal wave pattern in the width W direction of the coil 1, and the trapezoidal wave pattern is periodically rotated a predetermined number of times corresponding to the number of turns of the coil 1 in the length L direction of the coil 1. It is repeated to form a meander shape. As shown in FIG. 1, the sheet 4 is bent at a period in which one period in which the trapezoidal wave pattern is repeated is one period in the thickness t direction, so that the conductor path 5 has a winding shape.

シート4の上記の折り曲げは、図3に一点鎖線で示す線を谷折り線v、破線で示す線を山折り線mとして行われ、長さL方向において谷面Vと山面Mとが側面Sを介して交互に現れる、連続する4つの面を1周期とする周期で折り曲げられる。この折り曲げパターンは、図4の模式図に示すように、谷折り−山折り−山折り−谷折りを1周期としている。なお、同図において図3と同一または相当する部分には同一符号を付してその説明は省略する。導体路5は、連続する4つの面の内の、始めの谷折り線vで区切られる第1面Iの谷面Vにおいて、次に連続する第2面IIの側面Sに近付くに連れて振幅高さが高くなる幅W方向に振幅し、対角線方向に横切る。そして、次の第2面IIの側面Sを振幅高さを保って、長さL方向に平行に横切る。その後、第2面IIに連続する次の第3面IIIの山面Mにおいて、次に連続する第4面IVの側面Sに近付くに連れて振幅高さが低くなる幅W方向に振幅し、対角線方向に横切る。そして、次の第4面IVの側面Sを振幅高さを保って、長さL方向に平行に横切る。   The above-described bending of the sheet 4 is performed with the line indicated by the alternate long and short dash line in FIG. 3 as the valley fold line v and the line indicated by the broken line as the mountain fold line m, and the valley surface V and the mountain surface M are side surfaces in the length L direction. It is bent with a period of four consecutive surfaces appearing alternately through S as one period. As shown in the schematic diagram of FIG. 4, this folding pattern has one cycle of valley fold-mountain fold-mountain fold-valley fold. In the figure, the same or corresponding parts as in FIG. The conductor path 5 has an amplitude as it approaches the side surface S of the second surface II that is next continuous in the valley surface V of the first surface I divided by the first valley fold line v among the four continuous surfaces. It swings in the width W direction where the height increases and crosses in the diagonal direction. Then, the side surface S of the next second surface II is traversed in parallel with the length L direction while maintaining the amplitude height. After that, the peak surface M of the next third surface III that is continuous with the second surface II swings in the width W direction in which the amplitude height decreases as it approaches the side surface S of the next continuous fourth surface IV, Cross diagonally. Then, the side surface S of the next fourth surface IV is traversed in parallel with the length L direction while maintaining the amplitude height.

従って、導体路5は、長さL方向に進行するのに連れ、コイル1の厚みt方向において、曲げられたシート4の谷面Vへの下降と山面Mへの上昇を側面Sを介して交互に繰り返し、幅W方向において、振幅高さを第1面Iで高くし、第2面IIで保ち、第3面IIIで低くし、第4面IVで保って振幅し、巻き構造を呈する。コイル1のインダクタンス分は、第1面Iおよび第3面IIIでの振幅高さ変化が急で、導体路5の台形波状パターンが急峻なほど大きくなるが、コイル1を製造し難くなる。   Accordingly, as the conductor path 5 advances in the length L direction, the bent sheet 4 descends to the valley surface V and rises to the mountain surface M via the side surface S in the thickness t direction of the coil 1. In the width W direction, the amplitude height is increased on the first surface I, maintained on the second surface II, decreased on the third surface III, maintained on the fourth surface IV, and amplified in the width W direction. Present. The inductance of the coil 1 increases as the amplitude height changes sharply on the first surface I and the third surface III and the trapezoidal wave pattern of the conductor path 5 becomes steeper, but the coil 1 becomes difficult to manufacture.

導体路5は、図3に示すように、その巻き始めおよび巻き終わりのシート4上に電極パット5a,5aを備える。シート4は、上側基材3の両端部に備えられた凸部3d,3dの山面3c,3cに、電極パット5a,5aが露出して折り曲げられる。このため、電極パット5a,5aの前の側面Sにおける導体路5は、他の側面Sにおけるミアンダ周期の長さよりも長く形成されており、コイル1の厚みtとなる凸部3d,3dの高さ寸法とほぼ同じになっている。図5は、このようにして折り曲げられた状態のシート4の斜視図である。なお、同図において図3と同一または相当する部分には同一符号を付してその説明は省略する。   As shown in FIG. 3, the conductor path 5 includes electrode pads 5a and 5a on the sheet 4 at the start and end of winding. In the sheet 4, the electrode pads 5 a and 5 a are exposed and bent on the crest surfaces 3 c and 3 c of the convex portions 3 d and 3 d provided at both ends of the upper base material 3. For this reason, the conductor path 5 on the side surface S in front of the electrode pads 5a, 5a is formed longer than the length of the meander period on the other side surface S, and the height of the convex portions 3d, 3d that becomes the thickness t of the coil 1 is increased. It is almost the same as the size. FIG. 5 is a perspective view of the sheet 4 in a state of being folded in this manner. In the figure, the same or corresponding parts as in FIG.

本実施形態では、下側基材2と上側基材3との間にシート4を挟んでプレスすることで、シート4が図5に示すように折り曲げられ、コイル1が製造される。この際、シート4の両面に接着剤が付けられて、プレス加工が行われる。用いる接着剤の種類は一般的な接着剤でよく、例えば、エポキシ樹脂系の接着剤などが用いられる。   In the present embodiment, by pressing the sheet 4 between the lower base material 2 and the upper base material 3 and pressing, the sheet 4 is bent as shown in FIG. At this time, an adhesive is applied to both surfaces of the sheet 4 and press working is performed. The type of adhesive used may be a general adhesive, for example, an epoxy resin adhesive.

このような本実施形態のコイル1によれば、単一の導体路5が形成された図3に示すシート4が単に曲げられことで、シート4上に形成された導体路5が巻かれて、コイル1が形成される。従って、従来のコイルのように、複数の導電体を接続してコイルを構成する導体路を形成する必要がなくなる。このため、導電体の接続部を備えること無く、巻線型コイルに似た巻き構造のコイル1を形成することが可能になる。この結果、導電体を接合する工程が不要となってコイル製品価格の低廉化を図りながら、接続部信頼性の低下を招くことのない、巻線型コイルに似た巻き構造のコイル1を簡単に提供することができる。   According to the coil 1 of this embodiment, the sheet 4 shown in FIG. 3 in which the single conductor path 5 is formed is simply bent, and the conductor path 5 formed on the sheet 4 is wound. The coil 1 is formed. Therefore, it is not necessary to form a conductor path constituting the coil by connecting a plurality of conductors as in the conventional coil. For this reason, it becomes possible to form the coil 1 having a winding structure similar to a wound coil without providing a connection portion of a conductor. As a result, the coil 1 having a winding structure similar to the winding coil can be easily obtained without reducing the coil product price while eliminating the need to join the conductors and reducing the coil product price. Can be provided.

また、本実施形態のコイル1によれば、シート4の曲がりに下方および上方から嵌合する凹凸形状をそれぞれ一面2bおよび3bに有する下側基材2および上側基材3によってシート4が挟まれることで、シート4の図5に示す折り曲げ形状が保たれ、強度が確保されるので、コイル1の製品取り扱い性が向上する。   Moreover, according to the coil 1 of this embodiment, the sheet | seat 4 is pinched | interposed by the lower side base material 2 and the upper side base material 3 which have the uneven | corrugated shape which fits into the curvature of the sheet | seat 4 from the downward direction and the upper direction on the one surface 2b and 3b, respectively. Thus, the folded shape shown in FIG. 5 of the sheet 4 is maintained and the strength is ensured, so that the product handleability of the coil 1 is improved.

また、本実施形態のコイル1においては、導体路5の巻き始めおよび巻き終わりに導体路5に一体に形成された電極パット5a,5aが、上側基材3の両端部に備えられた凸部3d,3dの山面3c,3cに露出し、外部電極を構成する。このため、導電体の接続部を全く有すること無く、コイル1に外部電極を備えることができ、外部電極を備えた巻き構造のコイル1を安価にかつ接続信頼性高く提供することができる。   Further, in the coil 1 of the present embodiment, electrode pads 5 a and 5 a formed integrally with the conductor path 5 at the start and end of winding of the conductor path 5 are convex portions provided at both ends of the upper substrate 3. It is exposed to the crest surfaces 3c and 3c of 3d and 3d, and constitutes an external electrode. For this reason, it is possible to provide the coil 1 with an external electrode without having any connection portion of the conductor, and to provide the coil 1 having a winding structure including the external electrode at low cost and with high connection reliability.

また、本実施形態のコイル1においては、下側基材2および上側基材3がアルミナ等の非磁性体からなる場合には、下側基材2および上側基材3の透磁率が小さくなる。このため、コイル1のインダクタンスを低く抑えることができるので、高周波用途の巻き構造コイル1が提供される。また、下側基材2および上側基材3がフェライト等の磁性体からなる場合には、下側基材2および上側基材3の透磁率が大きくなる。このため、用いる磁性体の種類を選択することで、所望の大きさのインダクタンスを有する巻き構造コイル1が得られる。   Moreover, in the coil 1 of this embodiment, when the lower base material 2 and the upper base material 3 are made of a nonmagnetic material such as alumina, the magnetic permeability of the lower base material 2 and the upper base material 3 is reduced. . For this reason, since the inductance of the coil 1 can be kept low, the wound structure coil 1 for high frequency applications is provided. Further, when the lower base material 2 and the upper base material 3 are made of a magnetic material such as ferrite, the magnetic permeability of the lower base material 2 and the upper base material 3 is increased. For this reason, the winding structure coil 1 which has the inductance of a desired magnitude | size is obtained by selecting the kind of magnetic body to be used.

また、本実施形態のコイル1の製造方法によれば、シート4を曲げて導体路5を巻き構造に加工する工程と、下側基材2と上側基材3とを嵌合させてシート4の曲げ形状を保つ強度に加工する工程とが、下側基材2と上側基材3との間にシート4を挟んでプレスする1つの工程で行われる。このため、製造工程が少なくなり、巻き構造コイル1の製品コストをさらに低減することができる。   Moreover, according to the manufacturing method of the coil 1 of this embodiment, the process of bending the sheet 4 to process the conductor path 5 into a winding structure, and fitting the lower base material 2 and the upper base material 3 together to form the sheet 4 The step of processing to a strength that maintains the bent shape is performed in one step of pressing the sheet 4 between the lower substrate 2 and the upper substrate 3 and pressing. For this reason, a manufacturing process decreases and the product cost of the winding structure coil 1 can further be reduced.

また、本実施形態のコイル1の製造方法によれば、シート4の両面に接着剤が付けられて上記のプレス加工が行われるので、シート4を曲げて導体路5を巻き構造に加工する工程と、下側基材2と上側基材3とを嵌合させてシート4の曲げ形状を保つ強度に加工する工程と、下側基材2と上側基材3との間にシート4を接合する工程とが、下側基材2と上側基材3との間にシート4を挟んでプレスする1つの工程で行われる。このため、製造工程がさらに少なくなり、巻き構造コイル1の製品コストをさらに低減することができる。   Moreover, according to the manufacturing method of the coil 1 of this embodiment, since adhesives are attached to both surfaces of the sheet 4 and the above pressing is performed, the sheet 4 is bent and the conductor path 5 is processed into a winding structure. And bonding the sheet 4 between the lower substrate 2 and the upper substrate 3, and the step of fitting the lower substrate 2 and the upper substrate 3 to the strength to keep the bent shape of the sheet 4. Is a single step of pressing the sheet 4 between the lower base material 2 and the upper base material 3 and pressing. For this reason, the number of manufacturing steps is further reduced, and the product cost of the wound structure coil 1 can be further reduced.

なお、上記の実施形態では、導体路5が、連続する面の内の第1面Iにおいて第2面IIに近付くに連れて振幅高さが高くなる幅W方向に振幅し、第3面IIIにおいて第4面IVに近付くに連れて振幅高さが低くなる幅W方向に振幅する場合について、説明した。しかし、導体路5は、連続する面の内の第1面Iにおいて第2面IIに近付くに連れて振幅高さが低くなる幅W方向に振幅し、第3面IIIにおいて第4面IVに近付くに連れて振幅高さが高くなる幅W方向に振幅するように構成してもよい。また、上記の実施形態では、導体路5が、第2面IIおよび第3面IIIを振幅高さを保って横切る場合について、説明した。しかし、導体路5は、第2面IIおよび第3面IIIを振幅高さをほぼ変えずに、例えば円弧状に横切るように構成してもよい。   In the above-described embodiment, the conductor path 5 swings in the width W direction in which the amplitude height increases as it approaches the second surface II in the first surface I of the continuous surfaces, and the third surface III. The case where the amplitude is increased in the width W direction in which the amplitude height decreases as it approaches the fourth surface IV has been described. However, the conductor path 5 swings in the width W direction in which the amplitude height decreases as it approaches the second surface II on the first surface I of the continuous surfaces, and on the fourth surface IV on the third surface III. You may comprise so that it may amplitude in the width W direction where an amplitude height becomes high as it approaches. In the above embodiment, the case where the conductor path 5 crosses the second surface II and the third surface III while maintaining the amplitude height has been described. However, the conductor path 5 may be configured to cross the second surface II and the third surface III, for example, in an arc shape without changing the amplitude height.

また、上記の実施形態では、導体路5が、振幅高さを第1面Iで高くし、第2面IIで保ち、第3面IIIで低くし、第4面IVで保って振幅する場合について、説明した。しかし、導体路5は、振幅高さを第1面Iで保ち、第2面IIで高くまたは低くし、第3面IIIで保ち、第4面IVで低くまたは高くなるように振幅する構成であってもよい。   Further, in the above-described embodiment, the conductor path 5 has an amplitude height increased on the first surface I, maintained on the second surface II, decreased on the third surface III, and maintained on the fourth surface IV to swing. Explained. However, the conductor path 5 has such a configuration that the amplitude height is maintained on the first surface I, is increased or decreased on the second surface II, is maintained on the third surface III, and is amplitude is decreased or increased on the fourth surface IV. There may be.

また、上記の実施形態では、シート4を谷折り線vおよび山折り線mに沿って折り曲げる場合について、説明した。しかし、シート4は必ずしも折り線に沿って折り曲げる必要は無く、波状などに湾曲させることで、シート4上に形成された導体路5を巻き構造にするようにしてもよい。この場合、下側基材2および上側基材3に設けられる凹凸形状も、図2に示すような階段状では無く、波状などの湾曲状となる。   In the above embodiment, the case where the sheet 4 is bent along the valley fold line v and the mountain fold line m has been described. However, the sheet 4 does not necessarily have to be bent along the fold line, and the conductor path 5 formed on the sheet 4 may be formed into a winding structure by being bent in a wavy shape or the like. In this case, the concavo-convex shape provided on the lower base material 2 and the upper base material 3 is not a step shape as shown in FIG.

また、上記の実施形態では、シート4の曲がりに下方および上方から嵌合する下側基材2および上側基材3により、シート4の強度を保つ構造を構成した場合について、説明した。しかし、電極パット5a,5aを露出させてシート4の周囲に樹脂を充填し、シート4の周囲を樹脂で直方体状に囲む樹脂基材などを備えることで、シート4の強度を保つ構造を構成するようにしてもよい。本構成によれば、シート4の曲げ形状がシート4の周囲を囲む樹脂などの基材によって保たれ、強度が確保されるので、本構成によっても、コイル1の製品取り扱い性が向上する。   Further, in the above-described embodiment, the case where the structure that maintains the strength of the sheet 4 is configured by the lower base material 2 and the upper base material 3 that are fitted to the bend of the sheet 4 from below and above has been described. However, the structure which maintains the intensity | strength of the sheet | seat 4 is comprised by exposing the electrode pad 5a, 5a, filling the circumference | surroundings of the sheet | seat 4 with resin, and providing the resin base material etc. which enclose the circumference | surroundings of the sheet | seat 4 in a rectangular parallelepiped shape. You may make it do. According to this configuration, the bent shape of the sheet 4 is maintained by the base material such as a resin surrounding the periphery of the sheet 4 and the strength is ensured, so that the product handleability of the coil 1 is also improved by this configuration.

また、上側基材3を備えず、シート4の曲がりに下方から嵌合する凹凸形状を一面2bに有する下側基材2だけを備えることで、シート4の強度を保つ構造を構成するようにしてもよい。本構成によれば、シート4の曲げ形状が下側基材2だけによって保たれ、強度が確保されるので、本構成によっても、コイル1の製品取り扱い性が向上する。   Moreover, the structure which maintains the intensity | strength of the sheet | seat 4 is comprised by not providing the upper side base material 3 but providing only the lower base material 2 which has the uneven | corrugated shape which fits in the curvature of the sheet | seat 4 from below on the one surface 2b. May be. According to the present configuration, the bent shape of the sheet 4 is maintained only by the lower base material 2 and the strength is ensured, so that the product handleability of the coil 1 is also improved by this configuration.

この際、シート4の電極パット5a,5a前の折り方を、上記の実施形態と異なり山折りとすることで、シート4は、図6の斜視図に示すように、両端部が内側に折り返された形状に折られる。なお、同図において図5と同一または相当する部分には同一符号を付してその説明は省略する。このため、下側基材2だけを備えることで得られるコイル1Aは、図7の斜視図に外観が示されるようになる。なお、同図において図2および図6と同一または相当する部分には同一符号を付してその説明は省略する。このコイル1Aにおいては、シート4は、下側基材2の両側部2c,2cを覆って下側基材2の底面2a側に両端部が曲げ返され、下側基材2の底面2aに電極パット5a,5aを露出させて、曲げられている。   At this time, the sheet 4 is folded in front of the electrode pads 5a and 5a in a mountain fold unlike the above embodiment, so that the sheet 4 is folded back inward as shown in the perspective view of FIG. Folded into a shape. In the figure, the same or corresponding parts as in FIG. For this reason, the external appearance of the coil 1 </ b> A obtained by providing only the lower substrate 2 is shown in the perspective view of FIG. 7. In the figure, the same or corresponding parts as those in FIGS. 2 and 6 are designated by the same reference numerals, and the description thereof is omitted. In this coil 1 </ b> A, the sheet 4 covers both side portions 2 c, 2 c of the lower substrate 2, and both end portions are bent back to the bottom surface 2 a side of the lower substrate 2, so that the sheet 4 is formed on the bottom surface 2 a of the lower substrate 2. The electrode pads 5a and 5a are exposed and bent.

本構成のコイル1Aによれば、導体路5の巻き始めおよび巻き終わりに導体路5に一体に形成された電極パット5a,5aが下側基材2の底面2aに露出し、外部電極を構成する。このため、本構成のコイル1Aによっても、導電体の接続部を全く有すること無く、コイル1Aに外部電極を備えることができ、外部電極を備えた巻き構造のコイル1Aを安価にかつ接続信頼性高く提供することができる。また、下側基材2の両側部で導体路5が曲げ返されることで、コイル1Aの長さL方向に外部電極形成のための寸法を図1に示すコイル1のように取る必要がなくなり、コイル1Aの長さL方向を全て巻線形成に使用することができる。このため、同外形寸法および同構成材料のコイルにおけるインダクタンス取得効率を上げることができる。図7に示すコイル1Aが奏するこのような作用効果は、凸部3d,3dを備えない次述する図8に示す上側基材3Aを用い、シート4を下側基材2と上側基材3Aとの間に挟んだ構成においても、得られる。   According to the coil 1A of this configuration, the electrode pads 5a, 5a formed integrally with the conductor path 5 at the start and end of winding of the conductor path 5 are exposed to the bottom surface 2a of the lower base member 2, thereby constituting an external electrode. To do. For this reason, even with the coil 1A of this configuration, the coil 1A can be provided with an external electrode without having a conductor connecting portion at all, and the coil 1A having a wound structure including the external electrode can be inexpensively connected. Can be offered high. Further, since the conductor path 5 is bent back at both sides of the lower base material 2, it is not necessary to take the dimension for forming the external electrode in the length L direction of the coil 1A as in the coil 1 shown in FIG. The entire length L direction of the coil 1A can be used for the winding formation. For this reason, the inductance acquisition efficiency in the coil of the same outer dimension and the same constituent material can be increased. Such an effect produced by the coil 1A shown in FIG. 7 is obtained by using the upper base material 3A shown in FIG. 8 described below, which does not include the convex portions 3d and 3d, and the sheet 4 is made of the lower base material 2 and the upper base material 3A. It can also be obtained in a configuration sandwiched between the two.

また、上記の実施形態では、上側基材3の両端部に、基材中央部に形成された凸部よりも大きな凸部3d,3dを備え、凸部3d,3dの山面3c,3cに電極パット5a,5aを露出させて外部電極を構成した場合について、説明した。しかし、このような凸部3d,3dを備えずに、例えば図8(a)の外観斜視図に示すように、上側基材3Aを構成するようにしてもよい。なお、同図において図1と同一または相当する部分には同一符号を付してその説明は省略する。この場合、下側基材2と上側基材3Aとによって構成される基材6の側面6aに露出する導体路5の巻き始めおよび巻き終わりに、同図(b)に示すように外部電極7を電気的に接続する。この外部電極7の形成は例えばディップ塗布法などで行われる。   Moreover, in said embodiment, it has convex part 3d, 3d larger than the convex part formed in the base-material center part in the both ends of the upper base material 3, and it forms in the crest surfaces 3c, 3c of convex part 3d, 3d. The case where the electrode pads 5a and 5a are exposed to form the external electrode has been described. However, the upper base material 3A may be configured, for example, as shown in the external perspective view of FIG. 8A without providing the convex portions 3d and 3d. In the figure, the same or corresponding parts as in FIG. In this case, at the start and end of winding of the conductor path 5 exposed on the side surface 6a of the base 6 constituted by the lower base 2 and the upper base 3A, as shown in FIG. Are electrically connected. The external electrode 7 is formed by, for example, a dip coating method.

本構成によれば、基材6の側面6aに露出する導体路5の巻き始めおよび巻き終わりにだけ外部電極7を接続することで、基材6の側面6aに外部電極7を備える巻き構造のコイル1Bを構成することができる。また、上記の実施形態のように、上側基材3の両端部に凸部3d,3dを形成する必要が無く、また、導体路5の巻き始めおよび巻き終わりに電極パット5a,5aを形成する必要も無い。このため、導電体の接続箇所が2箇所で、接続信頼性の低下を招くことの懸念が極めて少ない、外部電極7を備えた巻き構造のコイル1Bを安価にかつ接続信頼性高く提供することができる。   According to this configuration, the external electrode 7 is connected only at the start and end of winding of the conductor path 5 exposed on the side surface 6a of the base material 6, so that the winding structure includes the external electrode 7 on the side surface 6a of the base material 6. The coil 1B can be configured. Further, unlike the above-described embodiment, it is not necessary to form the convex portions 3d and 3d at both end portions of the upper base material 3, and the electrode pads 5a and 5a are formed at the start and end of winding of the conductor path 5. There is no need. For this reason, it is possible to provide the coil 1B having a wound structure including the external electrode 7 at a low cost and with high connection reliability, with two conductor connection points and very little concern about a decrease in connection reliability. it can.

また、シート4の周囲を樹脂で直方体状に囲む樹脂基材などを備えて構成される上述した巻き構造のコイルや、シート4の曲がりに下方から嵌合する凹凸形状を一面2bに有する下側基材2だけを備えて構成される上述した巻き構造のコイル1Aにおいて、導体路5の両端部に電極パット5a,5aを備えず、樹脂基材または下側基材2の側面に導体路5の巻き始めおよび巻き終わりを露出させることで、上記の外部電極7のような外部電極を基材の側面に構成することできる。このため、このような巻き構造のコイルによっても、導電体の接続箇所が2箇所で、接続信頼性の低下を招くことの懸念が極めて少ない、外部電極を備えた巻き構造のコイルを安価にかつ接続信頼性高く提供することができる。   Moreover, the coil | winding structure coil | winding structure comprised by providing the resin base material etc. which enclose the circumference | surroundings of the sheet | seat 4 in a rectangular parallelepiped shape with resin, or the lower side which has the uneven | corrugated shape fitted from the downward | lower direction to the bending of the sheet | seat 4 In the coil 1A having the above-described winding structure configured only by the base material 2, the electrode pads 5a and 5a are not provided at both ends of the conductor path 5, and the conductor path 5 is provided on the side surface of the resin base material or the lower base material 2. By exposing the start and end of winding, an external electrode such as the external electrode 7 can be formed on the side surface of the substrate. For this reason, even with such a coil having a wound structure, there are only two conductor connection points, and there is very little concern that the connection reliability will be lowered. Connection reliability can be provided with high reliability.

また、このように外部電極を導体路5とは別に形成する上記の巻き構造コイルにおいては、シート4の曲がりに嵌合する凹凸形状が連続して1面に形成された、基材の材質からなるマザー基板を用いて、マザー基板の上に、電極パット5a,5aを備えない導体路5が連続して形成されたシート4を嵌合させて、ダイシング等によって個々の製品に分割することができる。また、電極パット5a,5aを備えない導体路5が連続して形成されたシート4の周囲を囲む樹脂基材をマザー基板とし、このマザー基板をダイシング等によって分割することで、個々の製品を得ることができる。このため、1枚のマザー基板から多数個の製品を取るウエハ加工により、上記各構造のコイルを製造することができる。   Further, in the above-described wound structure coil in which the external electrode is formed separately from the conductor path 5 in this manner, the uneven shape that fits to the bend of the sheet 4 is continuously formed on one surface. A sheet 4 on which a conductor path 5 without electrode pads 5a and 5a is continuously formed is fitted on the mother board, and divided into individual products by dicing or the like. it can. In addition, the resin base material surrounding the periphery of the sheet 4 on which the conductor paths 5 not including the electrode pads 5a and 5a are continuously formed is used as a mother substrate, and the mother substrate is divided by dicing or the like, whereby individual products can be obtained. Can be obtained. For this reason, the coil of each said structure can be manufactured by the wafer processing which takes many products from one mother board | substrate.

また、図9に示す、基材の材質からなる下側マザー基板22および上側マザー基板33を用いて、これら下側マザー基板22および上側マザー基板23の間にシート4を挟んで図の点線に沿う箇所でダイシングをし、個々の製品に分割することによっても、マザー基板22,33から多数個の製品を取るウエハ加工によって図8に示す構造のコイル1Bを製造することができる。この場合、下側マザー基板22および上側マザー基板33には、シート4の曲がりに下方および上方から嵌合する凹凸形状が連続してそれぞれの1面に形成されている。   Further, the lower mother substrate 22 and the upper mother substrate 33 made of the material of the base material shown in FIG. 9 are used, and the sheet 4 is sandwiched between the lower mother substrate 22 and the upper mother substrate 23, and the dotted line in the figure. 8 can be manufactured by wafer processing in which a large number of products are taken from the mother substrates 22 and 33 by dicing along a portion along the line and dividing the product into individual products. In this case, the lower mother board 22 and the upper mother board 33 are each formed with a concave-convex shape that fits from below and above the bend of the sheet 4 on one surface.

また、図8に示す巻き構造のコイル1Bにおいて、下側基材2の凹凸形状と上側基材3Aの凹凸形状との各凹凸ピッチおよび各凹凸深さが均一でかつ同一の構造にすると、下側基材2または上側基材3Aの一方を他方に対して1ピッチずらし、かつ反転させることで、下側基材2または上側基材3Aの一方を下側基材2および上側基材3Aの双方として用いることができる。従って、下側基材2と上側基材3Aとの間に互換性が生じ、下側基材2および上側基材3Aの成形加工をプレスによって行う場合、同一のプレス金型で下側基材2および上側基材3Aのプレス成形加工を行うことができる。このため、コイル1Bの製品1個当たりに必要とされる金型のコストを半減することができ、巻き構造コイル1Bの製造コストをさらに低減することが可能になる。   Further, in the coil 1B having a winding structure shown in FIG. 8, when the unevenness pitch and the unevenness depth of the uneven shape of the lower substrate 2 and the uneven shape of the upper substrate 3A are uniform and the same structure, By shifting one of the side substrate 2 or the upper substrate 3A by one pitch with respect to the other and inverting it, one of the lower substrate 2 or the upper substrate 3A is changed between the lower substrate 2 and the upper substrate 3A. It can be used as both. Therefore, compatibility occurs between the lower base material 2 and the upper base material 3A, and when forming the lower base material 2 and the upper base material 3A by pressing, the lower base material is used with the same press mold. 2 and the upper substrate 3A can be press-molded. For this reason, the cost of the metal mold | die required per product of the coil 1B can be halved, and it becomes possible to further reduce the manufacturing cost of the winding structure coil 1B.

1,1A,1B…コイル
2…下側基材
2a…底面
2b…一面
2c…側面
3,3A…上側基材
3a…上面
3b…一面
3c…山面
3d…凸部
4…シート
5…導体路
5a…電極パット
W…幅
L…長さ
t…厚み
v…谷折り線
V…谷面
m…山折り線
M…山面
S…側面
DESCRIPTION OF SYMBOLS 1,1A, 1B ... Coil 2 ... Lower side base material 2a ... Bottom surface 2b ... One side 2c ... Side surface 3, 3A ... Upper side base material 3a ... Upper side 3b ... One side 3c ... Mountain surface 3d ... Convex part 4 ... Sheet 5 ... Conductor path 5a ... Electrode pad W ... Width L ... Length t ... Thickness v ... Valley fold line V ... Valley surface m ... Mountain fold line M ... Mountain surface S ... Side surface

Claims (3)

幅方向において所定のパターンで振幅し、長さ方向において前記パターンが所定回数周期的に繰り返される単一の導体路が電気絶縁性を有するシート上に形成され、厚み方向において、前記パターンが繰り返される周期で前記シートが曲げられて、前記導体路が巻かれて構成され、
前記シートの曲がりに嵌合する凹凸形状を一面に有する基材を備え、
前記導体路は、その巻き始めおよび巻き終わりの前記シート両端部上に電極パットを備え、
前記シートは、前記基材の両側部を覆って前記基材の底面側に両端部が曲げ返され、内側に折り返された両端部上の前記電極パットを前記基材の底面に露出させて曲げられる
コイル。
A single conductor path having a predetermined pattern in the width direction and periodically repeating the pattern a predetermined number of times in the length direction is formed on the sheet having electrical insulation, and the pattern is repeated in the thickness direction. The sheet is bent at a period, and the conductor path is wound and configured.
A substrate having an uneven shape that fits into the bend of the sheet on one side,
The conductor path includes electrode pads on both ends of the sheet at the beginning and end of winding thereof,
The sheet covers both side portions of the base material, and both end portions are bent back to the bottom surface side of the base material, and the electrode pads on both end portions folded inward are exposed to the bottom surface of the base material and bent. coil to be.
幅方向において所定のパターンで振幅し、長さ方向において前記パターンが所定回数周期的に繰り返される単一の導体路が電気絶縁性を有するシート上に形成され、厚み方向において、前記パターンが繰り返される周期で前記シートが曲げられて、前記導体路が巻かれて構成され、
前記シートの周囲を囲む基材、または、前記シートの曲がりに嵌合する凹凸形状を一面に有する基材、または、前記シートの曲がりに下方から嵌合する凹凸形状を一面に有する下側基材および前記シートの曲がりに上方から嵌合する凹凸形状を一面に有する上側基材からなる基材と、
前記基材の側面に露出する前記導体路の巻き始めおよび巻き終わりに電気的に接続され、前記基材の側面一面に形成される外部電極を備え
イル。
A single conductor path having a predetermined pattern in the width direction and periodically repeating the pattern a predetermined number of times in the length direction is formed on the sheet having electrical insulation, and the pattern is repeated in the thickness direction. The sheet is bent at a period, and the conductor path is wound and configured.
A base material that surrounds the periphery of the sheet, a base material that has a concave and convex shape that fits to the bend of the sheet, or a lower base material that has a concave and convex shape that fits to the bend of the sheet from below. And the base material which consists of an upper base material which has the uneven shape which fits from above into the curvature of the sheet,
Is electrically connected to the winding start and winding end of the conductive path exposed to the side surface of the substrate, Ru and an external electrode formed on one surface side of the substrate
Coils.
前記基材は、非磁性体または磁性体からなることを特徴とする請求項1または請求項2に記載のコイル。 The coil according to claim 1 , wherein the base material is made of a non-magnetic material or a magnetic material.
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