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JP4133677B2 - Multilayer electronic components - Google Patents
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JP4133677B2 - Multilayer electronic components - Google Patents

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JP4133677B2
JP4133677B2 JP2003298303A JP2003298303A JP4133677B2 JP 4133677 B2 JP4133677 B2 JP 4133677B2 JP 2003298303 A JP2003298303 A JP 2003298303A JP 2003298303 A JP2003298303 A JP 2003298303A JP 4133677 B2 JP4133677 B2 JP 4133677B2
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coil conductor
magnetic
conductor pattern
magnetic layer
coil
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JP2005072169A (en
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正憲 家入
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Toko Inc
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Description

本発明は、磁性体層とコイル用導体パターンを積層し、磁性体層間のコイル用導体パターンを接続して積層体内にコイルが形成された積層型電子部品に関する。   The present invention relates to a multilayer electronic component in which a magnetic layer and a coil conductor pattern are laminated, and a coil is formed in the laminate by connecting the coil conductor patterns between magnetic layers.

従来の積層型電子部品に、例えば、図3に示す様に、磁性体層31とコイル用導体パターン32を積層し、磁性体層間のコイル用導体パターン32を螺旋状に接続し、これら積層体内にコイルが形成されたものがある(例えば、特許文献1、2を参照。)。このコイルの両端は、積層体の端面に引き出され、外部端子に接続される。
特開昭62-61305号公報 特開平8-167535号公報
For example, as shown in FIG. 3, a magnetic layer 31 and a coil conductor pattern 32 are stacked on a conventional multilayer electronic component, and the coil conductor pattern 32 between the magnetic layers is spirally connected. In some cases, a coil is formed (see, for example, Patent Documents 1 and 2). Both ends of the coil are drawn out to the end face of the laminate and connected to external terminals.
JP-A-62-61305 Japanese Patent Laid-Open No. 8-167535

このような積層型電子部品をシート積層法で製造した場合、同じ厚みの磁性体シートを用いるため各磁性体層の厚みが同じになる。   When such a multilayer electronic component is manufactured by the sheet lamination method, the magnetic layers having the same thickness are used, so that the thickness of each magnetic layer is the same.

この様に形成された従来の積層型電子部品は、図3に点線で示す様に、各磁性体層を貫く磁束数が積層体の磁性体層とコイル用導体パターンの積層方向の中心に行くほど多くなっており、積層体を構成する磁性体が局所的に磁気飽和するという問題があった。積層体を構成する磁性体が局所的に磁気飽和した場合、インダクタンスが減少したり、ヒステリシス損の増加によって発熱したりする。通常、この様な現象を評価するのにコイルの直流重畳特性が用いられる。コイルに直流電流が重畳されていない時の値から10%低下する重畳電流を定格電流と称し、この値が大きい程コイルとして良好な製品と判断されている。しかしながら、従来の積層型電子部品は、前述の様に積層体を構成する磁性体が局所的に磁気飽和してしまうために、定格電流を大きくすることができなかった。   In the conventional multilayer electronic component formed in this way, as indicated by a dotted line in FIG. 3, the number of magnetic fluxes penetrating each magnetic layer goes to the center in the stacking direction of the multilayer magnetic layer and the coil conductor pattern. There was a problem that the magnetic material constituting the laminate was locally magnetically saturated. When the magnetic body constituting the laminated body is locally magnetically saturated, the inductance decreases or heat is generated due to an increase in hysteresis loss. Usually, the DC superposition characteristics of the coil are used to evaluate such a phenomenon. The superimposed current that decreases by 10% from the value when no direct current is superimposed on the coil is referred to as the rated current, and the larger this value, the better the product is determined as the coil. However, in the conventional multilayer electronic component, the rated current cannot be increased because the magnetic bodies constituting the multilayer body are locally magnetically saturated as described above.

本発明は、積層体を構成する磁性体が局所的に磁気飽和するのを防止して定格電流を大きくすることができる積層型電子部品を提供することを目的とする。   An object of the present invention is to provide a multilayer electronic component capable of increasing a rated current by preventing local magnetic saturation of a magnetic body constituting the multilayer body.

本発明の積層型電子部品は、積層体を構成する磁性体層の厚みや透磁率を改良することにより前述の課題を解決するものである。すなわち、磁性体層とコイル用導体パターンを積層し、磁性体層間のコイル用導体パターンを接続して積層体内にコイルが形成された積層型電子部品において、コイルは、磁性体層とコイル用導体パターンの積層方向に隣接するコイル用導体パターン間の間隔を、積層体の表面から積層体の中心へ向けて順次拡大して形成される。
また、本発明は、磁性体層とコイル用導体パターンを積層し、磁性体層間のコイル用導体パターンを接続して積層体内にコイルが形成された積層型電子部品において、積層体は、磁性体層とコイル用導体パターンの積層方向において積層体の表面から積層体の中心へ向けて磁性体層の透磁率を小さくして形成する。
The multilayer electronic component of the present invention solves the above-mentioned problems by improving the thickness and magnetic permeability of the magnetic layer constituting the multilayer body. That is, in a laminated electronic component in which a magnetic layer and a coil conductor pattern are stacked and a coil conductor pattern between magnetic layers is connected to form a coil in the laminate, the coil is composed of the magnetic layer and the coil conductor. The distance between the coil conductor patterns adjacent to each other in the pattern stacking direction is sequentially increased from the surface of the stack toward the center of the stack.
The present invention also relates to a multilayer electronic component in which a magnetic layer and a coil conductor pattern are laminated, and a coil conductor pattern is connected between the magnetic layers to form a coil in the laminate. The magnetic layer is formed so that the magnetic permeability of the magnetic layer is reduced from the surface of the multilayer body toward the center of the multilayer body in the lamination direction of the layer and the coil conductor pattern.

本発明の積層型電子部品は、積層体内に形成されたコイルが、磁性体層とコイル用導体パターンの積層方向に隣接するコイル用導体パターン間の間隔を積層体の表面側から積層体の中心へ向けて順次拡大して形成されるので、積層体を構成する磁性体が局所的に磁気飽和するのを防止することができ、定格電流を大きくすることができる。
また、本発明の積層型電子部品は、積層体が、磁性体層とコイル用導体パターンの積層方向において積層体の表面側から積層体の中心へ向けて磁性体層の透磁率を小さくして形成されるので、積層体を構成する磁性体が局所的に磁気飽和するのを防止することができ、定格電流を大きくすることができる。
In the multilayer electronic component of the present invention, the coil formed in the multilayer body has a gap between the coil conductor patterns adjacent to each other in the lamination direction of the magnetic layer and the coil conductor pattern from the surface side of the multilayer body to the center of the multilayer body. Therefore, it is possible to prevent local magnetic saturation of the magnetic body constituting the laminated body and increase the rated current.
In the multilayer electronic component according to the present invention, the laminate has a reduced permeability of the magnetic layer from the surface side of the laminate to the center of the laminate in the lamination direction of the magnetic layer and the coil conductor pattern. Since it is formed, it is possible to prevent the magnetic body constituting the laminated body from being locally magnetically saturated and to increase the rated current.

本発明の積層型電子部品は、磁性体層とコイル用導体パターンを積層し、磁性体層間のコイル用導体パターンを螺旋状に接続して積層体内にコイルが形成される。この時、コイルは、磁性体層とコイル用導体パターンの積層方向に隣接するコイル用導体パターンを積層体の表面側から積層体の中心へ向けて順次拡大して形成される。この様な積層型電子部品は、コイル用導体パターン間に位置する磁性体層の厚みが積層体の中心部にいくほど厚くなる。一般に磁束ΦはNI=RΦ(ただし、Nはターン数、Iは電流、Rは磁気抵抗)の関係にあり、磁気抵抗RはR=l/μA(ただし、lは実効磁路長、Aは実効磁路断面積、μは透磁率)となる。本発明の積層型電子部品は、磁性体層の厚みが積層体の中心に行くほど厚くなっているので、積層体の中心に行くほど実効磁路長lが長くなって磁気抵抗Rが大きくなる。
また、本発明の積層型電子部品は、コイル用導体パターン間に位置する磁性体層の透磁率が磁性体層とコイル用導体パターンの積層方向において積層体の表面側から積層体の中心に向けて順次小さくなる様に形成される。この様な積層型電子部品は、磁性体層の透磁率が積層体の中心に行くほど小さくなっているので、前述の式より積層体の中心に行くほど磁気抵抗Rが大きくなる。
従って、本発明の積層型電子部品は、コイル用導体パターンにより発生する磁束Φの大きさを調整して積層体の表面側の磁束密度と積層体の中心部の磁束密度をほぼ等しくすることができる。
In the multilayer electronic component of the present invention, a magnetic layer and a coil conductor pattern are laminated, and the coil conductor pattern between the magnetic layers is spirally connected to form a coil in the laminate. At this time, the coil is formed by sequentially enlarging the coil conductor pattern adjacent in the stacking direction of the magnetic layer and the coil conductor pattern from the surface side of the stack toward the center of the stack. In such a multilayer electronic component, the thickness of the magnetic layer located between the coil conductor patterns increases as the thickness increases toward the center of the multilayer body. In general, the magnetic flux Φ has a relationship of NI = R m Φ (where N is the number of turns, I is a current, and R m is a magnetic resistance), and the magnetic resistance R m is R m = l e / μA e (where l e Is the effective magnetic path length, Ae is the effective magnetic path cross-sectional area, and μ is the magnetic permeability). In the multilayer electronic component according to the present invention, the thickness of the magnetic layer increases toward the center of the multilayer body. Therefore, the effective magnetic path length l e increases and the magnetic resistance R m increases toward the center of the multilayer body. growing.
Further, in the multilayer electronic component of the present invention, the magnetic permeability of the magnetic layer located between the coil conductor patterns is directed from the surface side of the laminate to the center of the laminate in the lamination direction of the magnetic layer and the coil conductor pattern. Are formed so as to become sequentially smaller. Such multilayer electronic component, since the magnetic permeability of the magnetic layer is reduced toward the center of the stack, the magnetoresistive R m is increased toward the center of the laminate from the above equation.
Therefore, in the multilayer electronic component of the present invention, the magnitude of the magnetic flux Φ generated by the coil conductor pattern can be adjusted so that the magnetic flux density on the surface side of the multilayer body and the magnetic flux density at the center of the multilayer body are substantially equal. it can.

以下、本発明の積層型電子部品を図1、図2を参照して説明する。
図1は本発明の積層型電子部品の第1の実施例を示す断面図である。
図1において、11A〜11Iは磁性体層、12A〜12Hはコイル用導体パターンである。
磁性体層11A〜11Iは、フェライトを用いて形成される。この時、磁性体層11A〜11Iは、同じ透磁率となる様に形成される。また、積層型電子部品をシート積層法で製造する場合には磁性体シートを用いて磁性体層が形成され、積層型電子部品を印刷積層法で製造する場合には下層の磁性体層上にフェライトを印刷することにより磁性体層が形成される。
磁性体層11Aの表面には、コイル用導体パターン12Aが形成される。コイル用導体パターン12Aは、1ターン未満分が形成され、その一端が磁性体層11Aの端面に引き出される。
磁性体層11Bの表面には、コイル用導体パターン12Bが形成される。コイル用導体パターン12Bは、1ターン未満分が形成され、その一端がコイル用導体パターン12Aの他端に接続される。
磁性体層11Cの表面には、コイル用導体パターン12Cが形成される。コイル用導体パターン12Cは、1ターン未満分が形成され、一端がコイル用導体パターン12Bの他端に接続される。
磁性体層11Dの表面には、1ターン未満のコイル用導体パターン12Dが形成される。コイル用導体パターン12Dは、一端がコイル用導体パターン12Cの他端に接続される。
磁性体層11Eの表面には、1ターン未満のコイル用導体パターン12Eが形成され、一端がコイル用導体パターン12Dの他端に接続される。
磁性体層11Fの表面には、コイル用導体パターン12Fが形成される。コイル用導体パターン12Fの一端は、コイル用導体パターン12Eの他端に接続される。
磁性体層11Gの表面には、コイル用導体パターン12Gが形成され、その一端がコイル用導体パターン12Fの他端に接続される。
磁性体層11Hの表面には、コイル用導体パターン12Hが形成される。コイル用導体パターン12Hは、一端がコイル用導体パターン12Gの他端に接続され、他端が磁性体層11Hの端面に引き出される。この様にコイル用導体パターン12A〜12Hを螺旋状に接続することにより積層体内にコイルが形成される。
磁性体層11Iは、保護用の磁性体層であり、磁性体層11H上に積層することによりコイル用導体パターン12Hが保護される。
この様に磁性体層11A〜11Iとコイル用導体パターン12A〜12Hが積層された積層体の端面には、外部端子が形成される。この外部端子は、積層体の端面に引き出されたコイル用導体パターンと接続される。
また、コイル用導体パターン間に位置する磁性体層11B〜11Hは、磁性体層11Bの厚みt1から順に磁性体層11Cの厚みt2、磁性体層11Dの厚みt3、磁性体層11Eの厚みt4と積層体の中心にいくほど磁性体層の厚みが厚くなり、磁性体層11Eの厚みt4から順に磁性体層11Fの厚みt5、磁性体層11Gの厚みt6、磁性体層11Hの厚みt7と積層体の表面側にいくほど磁性体層の厚みが薄くなる。
Hereinafter, the multilayer electronic component of the present invention will be described with reference to FIGS.
FIG. 1 is a sectional view showing a first embodiment of the multilayer electronic component of the present invention.
In FIG. 1, 11A to 11I are magnetic layers, and 12A to 12H are coil conductor patterns.
The magnetic layers 11A to 11I are formed using ferrite. At this time, the magnetic layers 11A to 11I are formed to have the same magnetic permeability. In addition, when a multilayer electronic component is manufactured by a sheet lamination method, a magnetic layer is formed using a magnetic sheet, and when a multilayer electronic component is manufactured by a print lamination method, the magnetic layer is formed on a lower magnetic layer. A magnetic layer is formed by printing ferrite.
A coil conductor pattern 12A is formed on the surface of the magnetic layer 11A. The coil conductor pattern 12A is formed with less than one turn, and one end thereof is drawn out to the end face of the magnetic layer 11A.
A coil conductor pattern 12B is formed on the surface of the magnetic layer 11B. The coil conductor pattern 12B is formed with less than one turn, and one end thereof is connected to the other end of the coil conductor pattern 12A.
A coil conductor pattern 12C is formed on the surface of the magnetic layer 11C. The coil conductor pattern 12C is formed for less than one turn, and one end is connected to the other end of the coil conductor pattern 12B.
A coil conductor pattern 12D having less than one turn is formed on the surface of the magnetic layer 11D. One end of the coil conductor pattern 12D is connected to the other end of the coil conductor pattern 12C.
A coil conductor pattern 12E having less than one turn is formed on the surface of the magnetic layer 11E, and one end is connected to the other end of the coil conductor pattern 12D.
A coil conductor pattern 12F is formed on the surface of the magnetic layer 11F. One end of the coil conductor pattern 12F is connected to the other end of the coil conductor pattern 12E.
A coil conductor pattern 12G is formed on the surface of the magnetic layer 11G, and one end thereof is connected to the other end of the coil conductor pattern 12F.
A coil conductor pattern 12H is formed on the surface of the magnetic layer 11H. One end of the coil conductor pattern 12H is connected to the other end of the coil conductor pattern 12G, and the other end is drawn out to the end face of the magnetic layer 11H. Thus, a coil is formed in the laminated body by connecting the coil conductor patterns 12A to 12H in a spiral shape.
The magnetic layer 11I is a protective magnetic layer, and the coil conductor pattern 12H is protected by being laminated on the magnetic layer 11H.
In this way, external terminals are formed on the end surfaces of the laminate in which the magnetic layers 11A to 11I and the coil conductor patterns 12A to 12H are laminated. This external terminal is connected to the coil conductor pattern drawn out on the end face of the laminate.
Further, the magnetic layers 11B to 11H located between the coil conductor patterns have a thickness t2 of the magnetic layer 11C, a thickness t3 of the magnetic layer 11D, and a thickness t4 of the magnetic layer 11E in order from the thickness t1 of the magnetic layer 11B. The thickness of the magnetic layer increases as it goes to the center of the laminated body. The thickness t5 of the magnetic layer 11F, the thickness t6 of the magnetic layer 11G, and the thickness t7 of the magnetic layer 11H are sequentially increased from the thickness t4 of the magnetic layer 11E. The thickness of the magnetic layer becomes thinner toward the surface side of the laminate.

この様に形成された積層型電子部品は、磁性体層の厚みが積層体の中心にいくほど厚くなるので、積層体の中心にいくほど磁気抵抗Rが大きくなり、図1に点線で示す様にそれぞれのコイル用導体パターンにより発生する磁束Φ1〜Φ8の大きさが等しくなる。 The formed multilayer electronic component in this manner, since the thickness of the magnetic layer becomes thicker toward the center of the stack, the magnetoresistive R m is increased toward the center of the stack, indicated by the dotted line in FIG. 1 Similarly, the magnitudes of the magnetic fluxes Φ1 to Φ8 generated by the coil conductor patterns are equal.

図2は、本発明の積層型電子部品の第2の実施例を示す断面図である。
磁性体層21A〜21Iは、フェライトを用いて形成される。この時、磁性体層21A〜21Iは、同じ厚みとなる様に形成される。
磁性体層21Aの表面には、コイル用導体パターン22Aが形成される。コイル用導体パターン22Aは、その一端が磁性体層21Aの端面に引き出される。
磁性体層21Bの表面には、コイル用導体パターン22Bが形成される。コイル用導体パターン22Bは、一端がコイル用導体パターン22Aの他端に接続される。
磁性体層21Cの表面には、コイル用導体パターン22Cが形成され、一端がコイル用導体パターン22Bの他端に接続される。
磁性体層21Dの表面には、コイル用導体パターン22Dが形成され、一端がコイル用導体パターン22Cの他端に接続される。
磁性体層21Eの表面には、コイル用導体パターン22Eが形成され、一端がコイル用導体パターン22Dの他端に接続される。
磁性体層21Fの表面には、コイル用導体パターン22Fが形成され、一端がコイル用導体パターン22Eの他端に接続される。
磁性体層21Gの表面には、コイル用導体パターン22Gが形成され、一端がコイル用導体パターン22Fの他端に接続される。
磁性体層21Hの表面には、コイル用導体パターン22Hが形成される。コイル用導体パターン22Hは、一端がコイル用導体パターン22Gの他端に接続され、他端が磁性体層21Hの端面に引き出される。
磁性体層21Iは、保護用の磁性体層であり、磁性体層21H上に積層することによりコイル用導体パターン22Hが保護される。
この様に磁性体層とコイル用導体パターンが積層された積層体の端面には、外部端子が形成される。この外部端子は、積層体の端面に引き出されたコイル用導体パターンと接続される。
また、コイル用導体パターン間に位置する磁性体層21B〜21Hは、磁性体層21Bの透磁率から順に磁性体層21Cの透磁率、磁性体層21Dの透磁率、磁性体層21Eの透磁率と積層体の中心にいくほど磁性体層の透磁率が小さくなり、逆に、磁性体層21Eの透磁率から順に磁性体層21Fの透磁率、磁性体層21Gの透磁率、磁性体層21Hの透磁率と積層体の表面側にいくほど磁性体層の透磁率が大きくなる。
FIG. 2 is a sectional view showing a second embodiment of the multilayer electronic component of the present invention.
The magnetic layers 21A to 21I are formed using ferrite. At this time, the magnetic layers 21A to 21I are formed to have the same thickness.
A coil conductor pattern 22A is formed on the surface of the magnetic layer 21A. One end of the coil conductor pattern 22A is drawn to the end surface of the magnetic layer 21A.
A coil conductor pattern 22B is formed on the surface of the magnetic layer 21B. One end of the coil conductor pattern 22B is connected to the other end of the coil conductor pattern 22A.
A coil conductor pattern 22C is formed on the surface of the magnetic layer 21C, and one end is connected to the other end of the coil conductor pattern 22B.
A coil conductor pattern 22D is formed on the surface of the magnetic layer 21D, and one end is connected to the other end of the coil conductor pattern 22C.
A coil conductor pattern 22E is formed on the surface of the magnetic layer 21E, and one end is connected to the other end of the coil conductor pattern 22D.
A coil conductor pattern 22F is formed on the surface of the magnetic layer 21F, and one end is connected to the other end of the coil conductor pattern 22E.
A coil conductor pattern 22G is formed on the surface of the magnetic layer 21G, and one end is connected to the other end of the coil conductor pattern 22F.
A coil conductor pattern 22H is formed on the surface of the magnetic layer 21H. One end of the coil conductor pattern 22H is connected to the other end of the coil conductor pattern 22G, and the other end is drawn to the end face of the magnetic layer 21H.
The magnetic layer 21I is a protective magnetic layer and is laminated on the magnetic layer 21H to protect the coil conductor pattern 22H.
Thus, external terminals are formed on the end face of the laminate in which the magnetic layer and the coil conductor pattern are laminated. This external terminal is connected to the coil conductor pattern drawn out on the end face of the laminate.
Further, the magnetic layers 21B to 21H located between the coil conductor patterns are arranged in order from the magnetic permeability of the magnetic layer 21B, the magnetic permeability of the magnetic layer 21C, the magnetic permeability of the magnetic layer 21D, and the magnetic permeability of the magnetic layer 21E. The magnetic permeability of the magnetic layer decreases as it goes to the center of the laminate, and conversely, the magnetic permeability of the magnetic layer 21F, the permeability of the magnetic layer 21G, and the magnetic layer 21H in order from the permeability of the magnetic layer 21E. The magnetic permeability of the magnetic layer increases as it goes to the surface side of the laminate.

この様に形成された積層型電子部品は、磁性体層の透磁率が積層体の中心にいくほど小さくなるので、積層体の中心にいくほど磁気抵抗Rが大きくなり、それぞれのコイル用導体パターンにより発生する磁束の大きさが等しくなる。 The formed multilayer electronic component in this manner, since the magnetic permeability of the magnetic layer is decreased toward the center of the laminate, the magnetoresistance R m toward the center of the laminate is increased, conductor each coil The magnitude of the magnetic flux generated by the pattern becomes equal.

この様に本発明の積層型電子部品は、積層体の中心にいくほど磁気抵抗Rを大きくすることができるので、それぞれのコイル導体パターンにより発生する磁束の大きさを積層体内で局所的に磁気飽和しない様に調整することができる。 Multilayer electronic components such as the present invention, it is possible to increase the magnetic resistance R m toward the center of the laminate locally the magnitude of the magnetic flux generated by the respective coil conductor patterns in the laminate It can be adjusted so as not to cause magnetic saturation.

以上、本発明の積層型電子部品の実施例を述べたが、本発明はこれらの実施例に限定されるものではない。例えば、第1の実施例において、磁性体層に同じ透磁率のもの用いる場合を示したが、磁性体層は、積層体の中心にいくほど透磁率が小さくなるように材料を選択してもよい。また、第2の実施例において、磁性体層の厚みを同じにする場合を示したが、磁性体層の厚みを積層体の中心にいくほど厚くなるようにしてもよい。さらに、実施例ではコイルの場合を示したが、本発明は、積層体内に複数のコイルが形成されたり、コイルとコンデンサが一体に形成されたものについても適用することができる。   As mentioned above, although the Example of the multilayer electronic component of this invention was described, this invention is not limited to these Examples. For example, in the first embodiment, the case where the magnetic layer having the same magnetic permeability is used is shown. However, the magnetic layer may be selected by selecting a material so that the magnetic permeability becomes smaller toward the center of the laminated body. Good. In the second embodiment, the case where the thickness of the magnetic layer is the same is shown. However, the thickness of the magnetic layer may be increased toward the center of the laminate. Furthermore, although the case of a coil was shown in the embodiment, the present invention can be applied to a case in which a plurality of coils are formed in a laminated body or a coil and a capacitor are integrally formed.

本発明の積層型電子部品の第1の実施例を示す断面図である。It is sectional drawing which shows the 1st Example of the multilayer electronic component of this invention. 本発明の積層型電子部品の第2の実施例を示す断面図である。It is sectional drawing which shows the 2nd Example of the multilayer electronic component of this invention. 従来の積層型電子部品の断面図である。It is sectional drawing of the conventional multilayer electronic component.

符号の説明Explanation of symbols

11A〜11I 磁性体層
12A〜12H コイル用導体パターン
11A-11I Magnetic layer 12A-12H Conductor pattern for coil

Claims (2)

磁性体層とコイル用導体パターンを積層し、磁性体層間のコイル用導体パターンを接続して積層体内にコイルが形成された積層型電子部品において、
該コイルは、3層以上の磁性体層と該磁性体層間のコイル用導体パターンを備え、該コイル用導体パターンを螺旋状に接続して構成され、磁性体層とコイル用導体パターンの積層方向に隣接するコイル用導体パターン間の間隔を、積層体の表面側から積層体の中心へ向けて順次大きくし、かつ、各磁性体層が同じ透磁率となる様に形成して、該積層体の中心に行くほど磁気抵抗が大きくなる様に形成されたことを特徴とする積層型電子部品。
In a laminated electronic component in which a magnetic layer and a coil conductor pattern are laminated, and a coil conductor pattern is connected between magnetic layers to form a coil in the laminate,
The coil includes three or more magnetic layers and a coil conductor pattern between the magnetic layers, and is formed by connecting the coil conductor patterns in a spiral shape, and the lamination direction of the magnetic layer and the coil conductor pattern The gap between the coil conductor patterns adjacent to each other is sequentially increased from the surface side of the laminate toward the center of the laminate , and each magnetic layer has the same magnetic permeability. A multilayer electronic component characterized in that the magnetic resistance increases toward the center of the substrate.
磁性体層とコイル用導体パターンを積層し、磁性体層間のコイル用導体パターンを接続して積層体内にコイルが形成された積層型電子部品において、
該積層体は、3層以上の磁性体層と該磁性体層間に配置されて螺旋状に接続されたコイル用導体パターンによって構成され、磁性体層とコイル用導体パターンの積層方向において積層体の表面側から積層体の中心へ向けて磁性体層の透磁率を各層ごとに順次小さくして形成して、該コイルの巻軸と平行な方向の中心に行くほど磁気抵抗が大きくなる様に形成されたことを特徴とする積層型電子部品。
In a laminated electronic component in which a magnetic layer and a coil conductor pattern are laminated, and a coil conductor pattern is connected between magnetic layers to form a coil in the laminate,
The laminate is composed of three or more magnetic layers and a coil conductor pattern disposed between the magnetic layers and spirally connected, and the laminate is formed in the stacking direction of the magnetic layer and the coil conductor pattern. The magnetic permeability of the magnetic material layer is gradually reduced from the surface side toward the center of the laminated body, and the magnetic resistance increases toward the center in the direction parallel to the winding axis of the coil. A multilayer electronic component characterized by being made.
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