JP2008270269A - Core for winding-type electronic component, its production process and winding-type electronic component - Google Patents

Core for winding-type electronic component, its production process and winding-type electronic component Download PDF

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JP2008270269A
JP2008270269A JP2007107252A JP2007107252A JP2008270269A JP 2008270269 A JP2008270269 A JP 2008270269A JP 2007107252 A JP2007107252 A JP 2007107252A JP 2007107252 A JP2007107252 A JP 2007107252A JP 2008270269 A JP2008270269 A JP 2008270269A
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core
winding
electronic component
magnetic
magnetic permeability
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JP5098409B2 (en
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Masayasu Shigenaga
正健 繁永
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a core for winding-type electronic component in which inductance can be adjusted suitably owing to a DC superimposition property improved by employing an H shape. <P>SOLUTION: The core 13 for winding-type electronic component comprises a core portion 11 around which a winding 14 is wound, and a pair of flanges 12 formed at both ends of the core portion 11 wherein the core portion 11 has first and second high permeability material layers 11A and 11B, and a second nonmagnetic or low permeability material layer 11C interposed between these material layers 11A and 11B in the axial direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、直流重畳特性を改善した巻線型電子部品用コア、その製造方法及び巻線型電子部品に関するものである。   The present invention relates to a core for a wound electronic component having improved direct current superposition characteristics, a manufacturing method thereof, and a wound electronic component.

特許文献１には巻線コイル部品が記載されている。この巻線型コイルは、図６に示すように、巻芯部１Ａ及び鍔部１Ｂを有するコア１と、コア１の巻芯部１Ａに巻回されるワイヤ２と、コア１の下側の鍔部１Ｂに設けられ且つワイヤ２の両端が電気的に接続された一対の端子電極３と、を備えている。そして、コア１は、フェライト粉末等のコア材料の粉末を金型のＨ型凹部内に充填し、圧縮成形することによって一体形成されている。   Patent Document 1 describes a wound coil component. As shown in FIG. 6, the wire-wound coil includes a core 1 having a winding core portion 1 </ b> A and a flange portion 1 </ b> B, a wire 2 wound around the core portion 1 </ b> A of the core 1, and a lower hook of the core 1. A pair of terminal electrodes 3 provided on the portion 1B and electrically connected at both ends of the wire 2; The core 1 is integrally formed by filling a core material powder such as ferrite powder into an H-shaped concave portion of a mold and compression molding.

また、特許文献２には電源回路用積層インダクタが記載されている。このインダクタは、コイルを形成する導体と絶縁体とが交互に積層された積層体を備えて構成されている。この積層体は、高透磁率の磁性体からなる第１絶縁体と、積層体の内層に配置された低透磁率の磁性体または非磁性体からなる少なくとも一つの第２絶縁体とを備え、高透磁率の第１絶縁体と低透磁率の第２絶縁体がそれぞれのフェライトシートを焼成した焼結体として形成されている。このように透磁率の異なる絶縁体を積層することによって、任意の直流重畳性を有する積層インダクタを得ることができる。   Patent Document 2 describes a multilayer inductor for a power supply circuit. The inductor includes a laminated body in which conductors and insulators forming a coil are alternately laminated. The laminate includes a first insulator made of a magnetic material having a high magnetic permeability, and at least one second insulator made of a low permeability magnetic material or a non-magnetic material disposed in an inner layer of the laminate, A high-permeability first insulator and a low-permeability second insulator are formed as sintered bodies obtained by firing the respective ferrite sheets. Thus, by laminating insulators having different magnetic permeability, a multilayer inductor having an arbitrary direct current superimposition can be obtained.

特開２００５−１９１３９５JP-A-2005-191395 特許第３６２１３００Patent No. 3621300

しかしながら、特許文献１の巻線コイル部品は、コア１が一体的に形成されているため、巻芯部１Ａに磁束が集中し、直流電流を印加した時のインダクタ値の変化率が大きくなり、直流重畳性が悪化することがある。直流重畳性を改善するためには、巻芯部の内部に磁束の向きと直交する非磁性層を平面状に形成すれば磁束の集中が軽減される。しかしながら、この場合には例えばＨ型の充填部を有する金型を用いて充填部内の磁性材料を加圧してコアを一体成形するため、巻芯部１Ａの軸芯方向と直交する方向の非磁性層を巻芯部に設けることができない。   However, since the core 1 is integrally formed in the wound coil component of Patent Document 1, the magnetic flux concentrates on the core portion 1A, and the change rate of the inductor value when a direct current is applied increases. Direct current superimposition may deteriorate. In order to improve the direct current superimposition, the concentration of the magnetic flux can be reduced by forming a non-magnetic layer perpendicular to the direction of the magnetic flux inside the core portion in a planar shape. However, in this case, for example, the core is integrally formed by pressurizing the magnetic material in the filling portion using a mold having an H-type filling portion, so that the nonmagnetic property in the direction orthogonal to the axial direction of the core portion 1A A layer cannot be provided on the core.

一方、特許文献２の電源回路用積層インダクタの場合には、透磁率の低い第２絶縁体を磁束と直交する方向に設け、直流重畳性を改善することができるが、この場合には透磁率の高い第１絶縁層と透磁率の低い第２絶縁層が積層して形成されているため、図４に示すようなＨ型のコア１Ａを加工することができない。   On the other hand, in the case of the multilayer inductor for power supply circuit disclosed in Patent Document 2, the second insulator having a low magnetic permeability can be provided in a direction orthogonal to the magnetic flux to improve DC superimposition. Since the first insulating layer having a high thickness and the second insulating layer having a low magnetic permeability are laminated, the H-type core 1A as shown in FIG. 4 cannot be processed.

本発明は、上記課題を解決するためになされたもので、Ｈ型で直流重畳性を改善し、インダクタンスを適宜調整することができる巻線型電子部品用コア、その製造方法及び巻線型電子部品を提供することを目的としている。   The present invention has been made in order to solve the above-described problems. A core for a wound electronic component that can improve direct current superimposition with an H type and can appropriately adjust the inductance, a manufacturing method thereof, and a wound electronic component are provided. It is intended to provide.

本発明の請求項１に記載の巻線型電子部品用コアは、巻線を巻回するための巻芯部と、この巻芯部の両端に形成された一対の鍔部と、を備え、上記巻芯部は、その軸芯方向に互いに透磁率の異なる複数の材料層を有することを特徴とするものである。   A core for a wound electronic component according to claim 1 of the present invention includes a winding core portion for winding a winding, and a pair of flange portions formed at both ends of the winding core portion. The winding core portion has a plurality of material layers having different magnetic permeability in the axial direction.

また、本発明の請求項２に記載の巻線型電子部品用コアは、請求項１に記載の発明において、上記複数の材料層は、透磁率の高い磁性材料からなる第１、第２の材料層と、これらの第１、第２の材料層の間に介在する非磁性材料または透磁率の低い磁性材料からなる第３の材料層とからなることを特徴とするものである。   According to a second aspect of the present invention, there is provided a core for a wound electronic component according to the first aspect, wherein the plurality of material layers are first and second materials made of a magnetic material having high magnetic permeability. And a third material layer made of a non-magnetic material or a magnetic material having a low magnetic permeability interposed between the first and second material layers.

また、本発明の請求項３に記載の巻線型電子部品用コアは、請求項２に記載の発明において、上記第１の材料層と上記第２の材料層は、互いに透磁率が異なる磁性材料からなることを特徴とするものである。   According to a third aspect of the present invention, there is provided the core for a wound electronic component according to the second aspect, wherein the first material layer and the second material layer have different magnetic permeability. It is characterized by comprising.

また、本発明の請求項４に記載の巻線型電子部品用コアの製造方法は、巻線を巻回するための巻芯部と、この巻芯部に両端に形成された一対の鍔部と、を備え、上記巻芯部は、その軸芯方向に互いに透磁率の異なる複数の材料層を有する巻線型電子部品用コアを製造する方法であって、上記透磁率の異なる複数の材料板を互いに接着剤によって接合して積層体として一体化する工程と、上記積層体の上下両端部以外を部分的に除去して上記巻芯部及び上記一対の鍔部を形成する工程と、を備えたことを特徴とするものである。   According to a fourth aspect of the present invention, there is provided a winding type electronic component core manufacturing method comprising: a core portion for winding a winding; and a pair of flange portions formed on both ends of the core portion. The winding core portion is a method for manufacturing a core for a wound electronic component having a plurality of material layers having different magnetic permeability in the axial direction, and the plurality of material plates having different magnetic permeability are provided. A step of joining together with an adhesive and integrating as a laminated body, and a step of partially removing portions other than the upper and lower ends of the laminated body to form the core portion and the pair of flange portions. It is characterized by this.

また、本発明の請求項５に記載の巻線型電子部品は、巻芯部及びこの巻芯部の左右両端に形成された鍔部からなるコアと、上記巻芯部に巻回された巻線と、上記鍔部に形成され且つ上記巻線の両端がそれぞれ電気的に接続された端子電極と、を備え、上記コアが請求項１〜請求項３のいずれか１項の巻線型電子部品用コアによって形成されていることを特徴とするものである。   According to a fifth aspect of the present invention, there is provided a wound-type electronic component comprising: a core comprising a core portion and flanges formed at both left and right ends of the core portion; and a winding wound around the core portion. And a terminal electrode formed on the flange and electrically connected to both ends of the winding, and the core is for the wound electronic component according to any one of claims 1 to 3. It is formed by a core.

また、本発明の請求項６に記載の巻線型電子部品は、請求項５に記載の発明において、少なくとも上記巻芯部が磁性材料を含む樹脂によって被覆されていることを特徴とするものである。   According to a sixth aspect of the present invention, in the wound electronic component according to the fifth aspect, at least the core is covered with a resin containing a magnetic material. .

本発明によれば、Ｈ型で直流重畳性を改善し、インダクタンスを適宜調整することができる巻線型電子部品用コア、その製造方法及び巻線型電子部品を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the direct current | flow superimposition property can be improved by H type | mold, and the core for winding type electronic components which can adjust an inductance suitably, its manufacturing method, and a winding type electronic component can be provided.

以下、図１〜図５に示す実施形態に基づいて本発明について説明する。尚、各図中、図１は本発明の巻線型電子部品の一実施形態を示す断面図、図２の（ａ）〜（ｃ）はそれぞれ図１に示す巻線型電子部品に用いられるコアの製造方法の要部を工程順に示す工程図、図３は本発明の巻線型電子部品の他の実施形態を示す断面図、図４の（ａ）〜（ｃ）はそれぞれ図３に示す巻線型電子部品に用いられるコアの製造方法の要部を工程順に示す工程図、図５は本発明の巻線型電子部品の更に他の実施形態を示す断面図である。   Hereinafter, the present invention will be described based on the embodiment shown in FIGS. In each figure, FIG. 1 is a cross-sectional view showing an embodiment of the wound electronic component of the present invention, and FIGS. 2A to 2C are cores used in the wound electronic component shown in FIG. FIG. 3 is a cross-sectional view showing another embodiment of the wire wound electronic component of the present invention, and FIGS. 4A to 4C are wire winding types shown in FIG. 3, respectively. The process figure which shows the principal part of the manufacturing method of the core used for an electronic component in order of a process, FIG. 5 is sectional drawing which shows other embodiment of the winding type | mold electronic component of this invention.

第１の実施形態
本実施形態の巻線型コイル１０は、例えば図１に示すように、巻芯部１１及びその上下両端に形成された鍔部１２を有するコア１３と、コア１３の巻芯部１１に巻回された絶縁皮膜付きの巻線（以下、「ワイヤ」と称す。）１４と、下方の鍔部１２の下面に設けられ且つワイヤ１４の端部が接続された端子電極１５と、を備え、コア１３の断面形状がＨ型に形成されている。 First Embodiment As shown in FIG. 1, for example, the winding type coil 10 of the present embodiment includes a core 13 having a core 11 and flanges 12 formed at both upper and lower ends thereof, and a core of the core 13. 11, a winding 14 with an insulating film wound around 11 (hereinafter referred to as “wire”), a terminal electrode 15 provided on the lower surface of the lower flange 12 and connected to the end of the wire 14, The cross section of the core 13 is formed in an H shape.

本実施形態では巻芯部１１は、図１に示すように、第１、第２の材料層１１Ａ、１１Ｂと、これら両者１１Ａ、１１Ｂ間に介在する第３の材料層１１Ｃと、を有する三層構造になっている。第１、第３の材料層１１Ａ、１１Ｂは、いずれも例えばフェライト等の透磁率の高い同一の磁性材料によって形成されている。これらの材料層１１Ａ、１１Ｂは、それぞれ上下の鍔部１２、１２から連設されていて、上下の鍔部１２もフェライト等の透磁率の高い磁性材料によって形成されている。第３の材料層１１Ｃは、非磁性材料または第１、第２の材料層１１Ａ、１Ｂの磁性材料より透磁率の低い磁性材料によって形成されている。また、第３の材料層１１Ｃは、磁性粉末を含有する樹脂接着剤によって形成しても良い。例えば、第１、第２の材料層１１Ａ、１１Ｂの透磁率は、２５〜１５００の範囲が好ましく、第３の材料層１１Ｃの透磁率は、１〜２５の範囲が好ましい。また、端子電極１５の材料は、電極として用いられる金属であれば特に制限されないが、例えば銀、ニッケル、銅及び錫の合金によって形成されている。   In the present embodiment, as shown in FIG. 1, the core portion 11 includes three first and second material layers 11A and 11B, and a third material layer 11C interposed between the both 11A and 11B. It has a layered structure. The first and third material layers 11A and 11B are both made of the same magnetic material having a high magnetic permeability such as ferrite. These material layers 11A and 11B are connected to the upper and lower flanges 12 and 12, respectively, and the upper and lower flanges 12 are also made of a magnetic material having a high magnetic permeability such as ferrite. The third material layer 11C is formed of a nonmagnetic material or a magnetic material having a lower permeability than the magnetic materials of the first and second material layers 11A and 1B. Further, the third material layer 11C may be formed of a resin adhesive containing magnetic powder. For example, the permeability of the first and second material layers 11A and 11B is preferably in the range of 25 to 1500, and the permeability of the third material layer 11C is preferably in the range of 1 to 25. The material of the terminal electrode 15 is not particularly limited as long as it is a metal used as an electrode, but is formed of, for example, an alloy of silver, nickel, copper, and tin.

このように巻芯部１１は、透磁率の高い第１、第２の材料層１１Ａ、１１Ｂの間に透磁率の低い第３の材料層１１Ｃが介在する三層構造になっているため、第３の材料層１１Ｃの働きで第１の材料層１１Ａと第２の材料層１１Ｂとの磁気的結合が弱められるため、第１、第２の材料層１１Ａ、１１Ｂにおいて磁束密度の低い領域が独立して形成される。そのため、第３の材料層１１Ｃがない場合と比較して、巻芯部１１での磁束の集中を抑制あるいは防止して磁気的に飽和し難く、直流重畳性が改善されて、定格電流を大きく取ることができ、安定したインダクタンスを得ることができる。また、第３の材料層１１Ｃの厚みを調整することにより、インダクタンスを適宜調整することができる。   As described above, the core portion 11 has a three-layer structure in which the third material layer 11C having a low magnetic permeability is interposed between the first and second material layers 11A and 11B having a high magnetic permeability. Since the magnetic coupling between the first material layer 11A and the second material layer 11B is weakened by the action of the third material layer 11C, the regions where the magnetic flux density is low in the first and second material layers 11A and 11B are independent. Formed. Therefore, compared with the case where the third material layer 11C is not provided, the concentration of magnetic flux in the core portion 11 is suppressed or prevented, and it is difficult to be magnetically saturated, the direct current superimposition is improved, and the rated current is increased. And a stable inductance can be obtained. Further, the inductance can be adjusted as appropriate by adjusting the thickness of the third material layer 11C.

次に、図１に示すコア１３の製造方法について図２を参照しながら説明する。まず、透磁率の高いフェライトからなる第１、第２の材料板１１１Ａ、１１１Ｂと、非磁性材料または透磁率の低い磁性材料からなる第３の材料板１１１Ｃを準備する。次いで、図２の（ａ）に示すように、第２の材料板１１１Ｂが下層に、第３の材料板１１１Ｃが中層に、そして、第１の材料板１１１Ａが上層になるように、それぞれの材料板を配置して重ね合わせ、これらの材料板を接着剤または粘着シートによって接合し、所定の圧力で一体化することによって同図の（ｂ）に示す積層板を得る。   Next, a method for manufacturing the core 13 shown in FIG. 1 will be described with reference to FIG. First, first and second material plates 111A and 111B made of ferrite having a high magnetic permeability and a third material plate 111C made of a nonmagnetic material or a magnetic material having a low magnetic permeability are prepared. Next, as shown in FIG. 2A, the second material plate 111B is the lower layer, the third material plate 111C is the middle layer, and the first material plate 111A is the upper layer. The material plates are arranged and overlapped, these material plates are joined with an adhesive or a pressure-sensitive adhesive sheet, and integrated at a predetermined pressure to obtain a laminated plate shown in FIG.

次いで、図２の（ａ）に示すように積層板をダイサー等の切断工具によってコア１３の外径寸法となるようにチップ状のブロック１０’として切り出す。このブロック１０’の側面の中央部をレーザーあるいは切削等の手段で掘り込み、同図の（ｃ）に示すようにブロック１０’の側面の上下方向の中央部を除去して巻芯部１１を形成すると共に上下両端に鍔部１２を形成する。これにより、第１、第２の材料層１１Ａ、１１Ｂの間に第３の材料層１１Ｃが介在するＨ型コア１３を得ることができる。更に、このコア１３の下側の鍔部１２に導電性ペーストを塗布し、加熱処理して左右一対の端子電極１５を形成した後、巻線１４を所定の巻数だけ巻芯部１１に巻回することによって図１に示す巻線型電子部品１０を得ることができる。   Next, as shown in FIG. 2A, the laminated plate is cut out as a chip-shaped block 10 'so as to have the outer diameter of the core 13 by a cutting tool such as a dicer. The central portion of the side surface of the block 10 ′ is dug by means of laser or cutting, and the central portion in the vertical direction of the side surface of the block 10 ′ is removed as shown in FIG. At the same time, the flanges 12 are formed at both upper and lower ends. Thereby, the H-type core 13 in which the third material layer 11C is interposed between the first and second material layers 11A and 11B can be obtained. Further, a conductive paste is applied to the lower flange portion 12 of the core 13 and heat-treated to form a pair of left and right terminal electrodes 15, and then the winding 14 is wound around the core portion 11 by a predetermined number of turns. By doing so, the wire wound electronic component 10 shown in FIG. 1 can be obtained.

以上説明したように本実施形態によれば、透磁率の高いフェライトからなる第２の材料板１１１Ｂを下層に、非磁性材料または透磁率の低い磁性材料からなる第３の材料板１１１Ｃを中層に、第２の材料板１１１Ｂと同一の材料からなる第１の材料板１１１Ａを上層にし、これらを接着剤または粘着シートによって接合して積層板として一体化する工程と、積層板から切り出された個々のブロック１０’の上下両端部以外を部分的に除去して巻芯部１１及び上下一対の鍔部１２を形成する工程と、を備えているため、透磁率の低い第３の材料層１１Ｃを透磁率の高い第１、第２の材料層１１Ａ、１１Ｂで挟んだ巻芯部１１を有するコア１３を得ることができる。   As described above, according to the present embodiment, the second material plate 111B made of ferrite having a high magnetic permeability is used as a lower layer, and the third material plate 111C made of a nonmagnetic material or a magnetic material having a low magnetic permeability is used as a middle layer. The first material plate 111A made of the same material as the second material plate 111B is used as an upper layer, and these are joined together by an adhesive or an adhesive sheet to be integrated as a laminated plate, and the individual cut out from the laminated plate A portion of the block 10 ′ other than the upper and lower ends is partially removed to form the core portion 11 and the pair of upper and lower flange portions 12. Therefore, the third material layer 11C having a low magnetic permeability is provided. The core 13 having the core part 11 sandwiched between the first and second material layers 11A and 11B having high magnetic permeability can be obtained.

このようなコア１３の巻芯部１１に巻線１４を施した巻線型電子部品１０は、巻線１４に直流を印加すると、透磁率の低い巻芯部１１の第３の材料層１１Ｃによって、透磁率の高い第１、第２の材料層１１Ａ、１１Ｂの磁気的結合が弱められて、第１、第２の材料層１１Ａ、１１Ｂにおいて磁束密度の低い領域が独立して形成されるため、巻芯部１１での磁束の集中を抑制あるいは防止して直流重畳性が改善されて、定格電流を大きく取ることができ、安定したインダクタンスを得ることができる。また、第３の材料層１１Ｃの厚みを調整することにより、インダクタンスを適宜調整することができる。   When the winding type electronic component 10 in which the winding 14 is applied to the winding core 11 of the core 13 as described above, when a direct current is applied to the winding 14, the third material layer 11C of the winding core 11 having a low magnetic permeability Since the magnetic coupling of the first and second material layers 11A and 11B having a high magnetic permeability is weakened and regions having a low magnetic flux density are independently formed in the first and second material layers 11A and 11B, The direct current superimposition is improved by suppressing or preventing the concentration of the magnetic flux in the winding core portion 11, the rated current can be increased, and a stable inductance can be obtained. Further, the inductance can be adjusted as appropriate by adjusting the thickness of the third material layer 11C.

第２の実施形態
本実施形態の巻線型コイル２０は、例えば図３に示すように、巻芯部２１及びその上下両端に形成された鍔部２２Ａ、２２Ｂを有するコア２３と、巻芯部１１に巻回された絶縁皮膜付きのワイヤ２４と、下方の鍔部２２の下面に設けられ且つワイヤ２４の端部が接続された端子電極２５と、を備え、コア２３以外は第１の実施形態に準じて構成されている。 Second Embodiment As shown in FIG. 3, for example, the winding coil 20 of the present embodiment includes a core 23 having a core portion 21 and flanges 22 </ b> A and 22 </ b> B formed at both upper and lower ends thereof, and the core portion 11. And a terminal electrode 25 provided on the lower surface of the lower flange 22 and connected to the end of the wire 24, except for the core 23, the first embodiment. It is constituted according to.

本実施形態においても巻芯部２１は、図３に示すように、透磁率の高い第１、第２の材料層２１Ａ、２１Ｂと、これら両者２１Ａ、２１Ｂ間に介在する第３の材料層２１Ｃと、を有する三層構造になっている。第１、第２の材料層２１Ａ、２１Ｂは、いずれもフェライト等の透磁率の高い磁性材料によって形成されているが、本実施形態では第１の材料層２１Ａが第２の材料層２１Ｂより透磁率の高いフェライト等の磁性材料によって形成されている。第３の材料層２１Ｃは、第２の材料層２１Ｂより透磁率の低い磁性材料または非磁性材料によって形成されている。上側の鍔部２２Ａは、第１の材料層２１Ａと同一の磁性材料によって形成され、下側の鍔部２２Ｂは、第２の材料層２１Ｂと同一の磁性材料によって形成されている。   Also in the present embodiment, as shown in FIG. 3, the core portion 21 includes first and second material layers 21A and 21B having a high magnetic permeability, and a third material layer 21C interposed between the two material layers 21A and 21B. And has a three-layer structure. The first and second material layers 21A and 21B are both made of a magnetic material having a high magnetic permeability such as ferrite. In the present embodiment, the first material layer 21A is more permeable than the second material layer 21B. It is made of a magnetic material such as ferrite having a high magnetic permeability. The third material layer 21C is formed of a magnetic material or a nonmagnetic material having a lower magnetic permeability than the second material layer 21B. The upper flange portion 22A is formed of the same magnetic material as that of the first material layer 21A, and the lower flange portion 22B is formed of the same magnetic material as that of the second material layer 21B.

本実施形態のコア２３を製造する場合には、図４の（ａ）に示すように透磁率の高いフェライトからなる第１の材料板１２１Ａ、第１の材料板１２１Ａより透磁率の低いフェライトからなる第２の材料板１２１Ｂと、非磁性材料または透磁率の低い磁性材料からなる第３の材料板１２１Ｃを準備する。次いで、図４の（ａ）〜（ｃ）に示すように第１の実施形態と同一要領で、第２の材料板１２１Ｂが下層に、第３の材料板１２１Ｃが中層に、そして、第１の材料板１２１Ａが上層になるように重ね合わせて接着剤を介して一体化することにより積層板を得ることができる。その後、積層板をダイサー等によってチップ状のブロック２０’として切り出した後、ブロック２０’の側面の中央部をレーザーあるいは切削等の手段で掘り込み、同図の（ｃ）に示すＨ型コア２３を得ることができる。更に、このコア２３の下側の鍔部２２に左右一対の端子電極２５形成した後、巻芯部２１に巻線２４を所定の巻数だけ巻回することによって図１に示す巻線型電子部品２０を得ることができる。   When the core 23 of the present embodiment is manufactured, as shown in FIG. 4A, the first material plate 121A made of ferrite having a high magnetic permeability and the ferrite having a lower magnetic permeability than the first material plate 121A are used. A second material plate 121B and a third material plate 121C made of a nonmagnetic material or a magnetic material with low magnetic permeability are prepared. Next, as shown in FIGS. 4A to 4C, in the same manner as the first embodiment, the second material plate 121B is the lower layer, the third material plate 121C is the middle layer, and the first A laminated plate can be obtained by overlapping the material plates 121A so as to be an upper layer and integrating them with an adhesive. Thereafter, the laminated plate is cut out as a chip-like block 20 ′ by a dicer or the like, and then the central portion of the side surface of the block 20 ′ is dug by means of laser or cutting, and an H-shaped core 23 shown in FIG. Can be obtained. Further, after a pair of left and right terminal electrodes 25 are formed on the lower flange portion 22 of the core 23, the winding-type electronic component 20 shown in FIG. Can be obtained.

本実施形態によれば、第１の実施形態と同様に、巻芯部２１の軸芯方向の中間層である透磁率の低い第３の材料層２１Ｃによって透磁率の高い第１、第２の材料層２１Ａ、２１Ｂ間の磁気的結合が弱められて直流重畳性を改善することができる。更に、第１、第２の材料層２１Ａ、２１Ｂで透磁率が異なる材料を用いるため、両材料層２１Ａ、２１Ｂの温度特性の違いにより電子部品の温度特性を適宜調整することができる他、第１の実施形態と同様の作用効果を期することができる。   According to the present embodiment, similarly to the first embodiment, the first and second magnetic materials having high magnetic permeability are provided by the third material layer 21C having low magnetic permeability, which is an intermediate layer in the axial direction of the core portion 21. The magnetic coupling between the material layers 21A and 21B is weakened, and the direct current superimposition can be improved. Furthermore, since materials having different magnetic permeability are used in the first and second material layers 21A and 21B, the temperature characteristics of the electronic component can be adjusted as appropriate depending on the temperature characteristics of the two material layers 21A and 21B. The same effects as those of the first embodiment can be expected.

第３の実施形態
本実施形態の巻線型電子部品３０は、図５に示すように、巻芯部３１の巻線３４が磁性材料粉末を含む磁性樹脂３６によって被覆されている以外は、第１の実施形態の巻線型電子部品１０に準じて構成されている。 Third Embodiment As shown in FIG. 5, the wound electronic component 30 of the present embodiment is the first except that the winding 34 of the core 31 is covered with a magnetic resin 36 containing magnetic material powder. It is comprised according to the winding type electronic component 10 of the embodiment.

即ち、本実施形態では巻芯部３１の巻線３４を被覆する磁性樹脂３６が閉磁路を形成し、この閉磁路によって漏洩磁束を防止することができ、直流重畳性が更に改善されると共に外部への磁気的影響を防止することができる。また、第３の材料層３１Ｃの厚みの調整により取得インダクタンスの調整が容易になる。また、本実施形態では磁性樹脂３６によって閉磁路を形成しているが、磁性樹脂３６に代えて磁性材料からなるスリーブをコア３３に嵌合して閉磁路を形成しても良い。   That is, in this embodiment, the magnetic resin 36 that covers the winding 34 of the winding core portion 31 forms a closed magnetic circuit, and this closed magnetic circuit can prevent leakage magnetic flux. The magnetic influence on can be prevented. Further, adjustment of the acquired inductance is facilitated by adjusting the thickness of the third material layer 31C. Further, in the present embodiment, the closed magnetic path is formed by the magnetic resin 36, but a closed magnetic path may be formed by fitting a sleeve made of a magnetic material to the core 33 instead of the magnetic resin 36.

尚、本発明は上記各実施形態に何等制限されるものではない。例えば上記各実施形態では、巻芯部が三層構造になっているが、必要に応じて三層以上の構造であっても良い。また、第１、第２の材料層は、必要に応じてフェライト以外の適宜の磁性材料を選択することができる。第３の材料層は第１、第２の材料層の透磁率との関係に基づいて非磁性材料または透磁率の低い磁性材料を適宜選択することができる。要は、巻芯部がその軸芯方向に互いに透磁率の異なる複数の材料層を有するＨ型の巻線型電子部品用コアであれば本発明に包含される。   The present invention is not limited to the above embodiments. For example, in each of the above embodiments, the core portion has a three-layer structure, but may have a structure of three or more layers as necessary. For the first and second material layers, an appropriate magnetic material other than ferrite can be selected as necessary. As the third material layer, a nonmagnetic material or a magnetic material having a low magnetic permeability can be appropriately selected based on the relationship with the magnetic permeability of the first and second material layers. The point is that the core is included in the present invention as long as the core is an H-shaped wound electronic component core having a plurality of material layers having different magnetic permeability in the axial direction.

本発明は、電子機器や通信機器等に使用される巻線型電子部品用コア、その製造方法及び巻線型電子部品に好適に利用することができる。   INDUSTRIAL APPLICABILITY The present invention can be suitably used for a wound electronic component core used in electronic devices, communication devices, and the like, a manufacturing method thereof, and a wound electronic component.

本発明の巻線型電子部品の一実施形態を示す軸芯方向の断面図である。It is sectional drawing of the axial direction which shows one Embodiment of the winding type | mold electronic component of this invention. （ａ）〜（ｃ）はそれぞれ図１に示す巻線型電子部品用コアを製造する方法の要部を工程順に示す工程図である。(A)-(c) is process drawing which shows the principal part of the method of manufacturing the core for winding type | mold electronic components shown in FIG. 本発明の巻線型電子部品の他の実施形態を示す軸芯方向の断面図である。It is sectional drawing of the axial direction which shows other embodiment of the winding type | mold electronic component of this invention. （ａ）〜（ｃ）はそれぞれ図３に示す巻線型電子部品用コアを製造する方法を示す図２相当図である。(A)-(c) is a figure corresponding to Drawing 2 showing a method of manufacturing a core for winding type electronic parts shown in Drawing 3, respectively. 本発明の巻線型電子部品の更に他の実施形態を示す軸芯方向の断面図である。It is sectional drawing of the axial direction which shows other embodiment of the winding type | mold electronic component of this invention. 従来の巻線型電子部品の一例施形態を示す軸芯方向の断面図である。It is sectional drawing of the axial direction which shows an example embodiment of the conventional winding type electronic component.

符号の説明Explanation of symbols

１０、２０、３０ 巻線型電子部品
１１、２１、３２ 巻芯部
１１Ａ、２１Ａ、３１Ａ 透磁率の高い第１の材料層
１１Ｂ、２１Ｂ、３１Ｂ 透磁率の高い第２の材料層
１１Ｃ、２１Ｃ、３１Ｃ 透磁率の低い第３の材料層
１２、２２、３２ 鍔部
１３ コア（巻線型電子部品用コア）
１４、２４、３４ ワイヤ（巻線）
１５、２５、３５ 端子電極
３６ 磁性樹脂 10, 20, 30 Winding type electronic parts 11, 21, 32 Core portions 11A, 21A, 31A First material layers with high magnetic permeability 11B, 21B, 31B Second material layers with high magnetic permeability 11C, 21C, 31C Third material layer with low magnetic permeability 12, 22, 32 鍔 part 13 core (core for wire wound electronic component)
14, 24, 34 Wire (winding)
15, 25, 35 Terminal electrode 36 Magnetic resin

Claims (6)

巻線を巻回するための巻芯部と、この巻芯部の両端に形成された一対の鍔部と、を備え、上記巻芯部は、その軸芯方向に互いに透磁率の異なる複数の材料層を有することを特徴とする巻線型電子部品用コア。   A winding core portion for winding the winding wire, and a pair of flanges formed at both ends of the winding core portion. The winding core portion has a plurality of magnetic permeability different from each other in the axial direction. A core for a wound electronic component, comprising a material layer. 上記複数の材料層は、透磁率の高い磁性材料からなる第１、第２の材料層と、これらの第１、第２の材料層の間に介在する非磁性材料または透磁率の低い磁性材料からなる第３の材料層とからなることを特徴とする請求項１に記載の巻線型電子部品用コア。   The plurality of material layers include a first material layer and a second material layer made of a magnetic material having a high magnetic permeability, and a nonmagnetic material or a magnetic material having a low magnetic permeability interposed between the first and second material layers. The core for a wound electronic component according to claim 1, wherein the core is a third material layer. 上記第１の材料層と上記第２の材料層は、互いに透磁率が異なる磁性材料からなることを特徴とする請求項２に記載の巻線型電子部品用コア。   The core for a wound electronic component according to claim 2, wherein the first material layer and the second material layer are made of magnetic materials having different magnetic permeability. 巻線を巻回するための巻芯部と、この巻芯部に両端に形成された一対の鍔部と、を備え、上記巻芯部は、その軸芯方向に互いに透磁率の異なる複数の材料層を有する巻線型電子部品用コアを製造する方法であって、
上記透磁率の異なる複数の材料板を互いに接着剤によって接合して積層体として一体化する工程と、
上記積層体の上下両端部以外を部分的に除去して上記巻芯部及び上記一対の鍔部を形成する工程と、を備えた
ことを特徴とする巻線型電子部品用コアの製造方法。 A winding core portion for winding the winding; and a pair of flanges formed at both ends of the winding core portion. The winding core portion has a plurality of magnetic permeability different from each other in the axial direction. A method of manufacturing a core for a wound electronic component having a material layer,
A step of joining together a plurality of material plates having different magnetic permeability by an adhesive and integrating them as a laminate;
And a step of partially removing portions other than the upper and lower ends of the laminate to form the core and the pair of flanges. A method for producing a core for a wound electronic component, comprising: 巻芯部及びこの巻芯部の左右両端に形成された鍔部からなるコアと、上記巻芯部に巻回された巻線と、上記鍔部に形成され且つ上記巻線の両端がそれぞれ電気的に接続された端子電極と、を備え、上記コアが請求項１〜請求項３のいずれか１項の巻線型電子部品用コアによって形成されていることを特徴とする巻線型電子部品。   A core consisting of a core part and a flange part formed on both right and left ends of the core part, a winding wound around the core part, and both ends of the winding formed on the flange part are electrically connected. And a terminal electrode connected thereto, wherein the core is formed by the core for a wound electronic component according to any one of claims 1 to 3. 少なくとも上記巻芯部が磁性材料を含む樹脂によって包囲されていることを特徴とする請求項５に記載の巻線型電子部品。   6. The wound electronic component according to claim 5, wherein at least the winding core is surrounded by a resin containing a magnetic material.
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