JP5689091B2 - Manufacturing method of surface mount multiphase inductor - Google Patents

Manufacturing method of surface mount multiphase inductor Download PDF

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JP5689091B2
JP5689091B2 JP2012079239A JP2012079239A JP5689091B2 JP 5689091 B2 JP5689091 B2 JP 5689091B2 JP 2012079239 A JP2012079239 A JP 2012079239A JP 2012079239 A JP2012079239 A JP 2012079239A JP 5689091 B2 JP5689091 B2 JP 5689091B2
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air
core
tablet
sealing material
coil
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JP2013211330A (en
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齋藤 公一
公一 齋藤
敬太 宗内
敬太 宗内
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Toko Inc
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Toko Inc
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Priority to TW102107585A priority patent/TWI566264B/en
Priority to KR1020130028483A priority patent/KR102009694B1/en
Priority to CN201310105411.2A priority patent/CN103366945B/en
Priority to CN201610671202.8A priority patent/CN106158293B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • H01F27/022Encapsulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/24Magnetic cores
    • H01F27/255Magnetic cores made from particles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2847Sheets; Strips
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/29Terminals; Tapping arrangements for signal inductances
    • H01F27/292Surface mounted devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/32Insulating of coils, windings, or parts thereof
    • H01F27/327Encapsulating or impregnating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00Fixed inductances of the signal type 
    • H01F17/04Fixed inductances of the signal type  with magnetic core
    • H01F2017/048Fixed inductances of the signal type  with magnetic core with encapsulating core, e.g. made of resin and magnetic powder
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2847Sheets; Strips
    • H01F2027/2857Coil formed from wound foil conductor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Description

本発明は面実装マルチフェーズインダクタの製造方法に関する。   The present invention relates to a method of manufacturing a surface mount multiphase inductor.

近年、デジタル機器等の小型・薄型化に伴う高密度実装化が進んでおり、電子部品の小型化や低背化への要求が強まっている。そこで出願人は、先に出願した特許文献1において、平角導線をその端部の両方が外周に引き出されるように渦巻き状に巻回したコイルと予備成形されたタブレットを用いた小型の面実装インダクタとその製造方法を提案した。   In recent years, high-density mounting is progressing along with miniaturization and thinning of digital devices and the like, and there is an increasing demand for miniaturization and low profile of electronic components. In view of this, the applicant has disclosed a small surface-mount inductor using a coil and a pre-formed tablet in which a flat conductor is wound in a spiral shape so that both ends thereof are drawn to the outer periphery in Patent Document 1 previously filed. And the manufacturing method was proposed.

特開2010−245473JP 2010-245473 A

回路基板上に同特性のインダクタが複数個並列に実装できるような回路パターンになっている場合、単品を複数個実装するよりも複数個が1パッケージに内設される方が実装効率を高めることができる。そのため、複数個のインダクタが1パッケージ化された面実装マルチフェーズインダクタが求められている。   When the circuit pattern is such that a plurality of inductors with the same characteristics can be mounted in parallel on the circuit board, mounting efficiency is improved by installing a plurality of inductors in one package rather than mounting a plurality of single products. Can do. Therefore, there is a demand for a surface mount multiphase inductor in which a plurality of inductors are packaged.

そこで本発明では、面実装マルチフェーズインダクタの製造方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a method for manufacturing a surface-mounted multiphase inductor.

上記課題を解決するために、本発明の面実装マルチフェーズインダクタの製造方法は、成型金型を用いて主に樹脂と磁性粉末とからなる封止材で複数のコイルを封止し、以下の工程を有する。
(1)封止材を平板形状の周縁部に柱状凸部を有する形状に予備成形して複数のタブレットを形成する
(2)導線を巻回してコイルを形成する
(3)タブレットにコイルを載置し、コイルの両端部をタブレットの柱状凸部の外側側面に沿わせたものを成型金型内の1つのキャビティに対して複数配置する
(4)コイルの両端部がタブレットの柱状凸部の外側側面とキャビティの内壁面との間に挟まれた状態でコイルと封止材を樹脂成形法もしくは圧粉成形法を用いて一体化させてコア部を形成する
(5)コア部の表面にコイルの両端部の少なくとも一部が露出する部分と接続する外部電極をコア部の表面または外周に設ける
In order to solve the above-described problems, a method for manufacturing a surface-mount multiphase inductor according to the present invention uses a molding die to seal a plurality of coils with a sealing material mainly composed of resin and magnetic powder, Process.
(1) Preliminarily molding a sealing material into a shape having a columnar convex portion on a flat peripheral edge to form a plurality of tablets (2) Winding a conductive wire to form a coil (3) Mount the coil on the tablet A plurality of coils having both ends of the coil along the outer side surface of the columnar convex portion of the tablet are arranged with respect to one cavity in the molding die. (4) Both ends of the coil are the columnar convex portions of the tablet. A core part is formed by integrating a coil and a sealing material using a resin molding method or a compacting method while being sandwiched between an outer side surface and an inner wall surface of a cavity. (5) On the surface of the core part Provide external electrodes on the surface or outer periphery of the core to connect to the exposed portions of at least part of both ends of the coil

本発明の面実装マルチフェーズインダクタの製造方法は、回路基板上の高密度実装を実現することができる。   The method for manufacturing a surface-mounted multi-phase inductor according to the present invention can realize high-density mounting on a circuit board.

本発明の面実装マルチフェーズインダクタの製造方法では、タブレットを用いてそれぞれのコイルおよびその端部の位置だしが容易となる。そのため、コイルおよびその端部の位置ズレを防止する。そして、コイルとそれに対応するタブレットを複数用いることによって、コイルの巻回方向や個数、配置などの設計変更に柔軟に対応することができる。   In the method for manufacturing a surface-mounted multiphase inductor according to the present invention, it is easy to position each coil and its end using a tablet. Therefore, displacement of the coil and its end is prevented. Further, by using a plurality of coils and tablets corresponding to the coils, it is possible to flexibly cope with design changes such as the winding direction, the number, and the arrangement of the coils.

封止材として主に金属磁性粉末と樹脂を用い、その透磁率を10〜30となるように調製した封止材でタブレットを作製した場合には、コイル間の結合係数を0.1以下とした面実装マルチフェーズインダクタを作成することができる。   When using a metal magnetic powder and a resin as the sealing material and producing a tablet with the sealing material prepared so that the magnetic permeability is 10 to 30, the coupling coefficient between the coils is 0.1 or less. Surface mounted multiphase inductors can be created.

本発明の実施例で用いるコイルの斜視図。The perspective view of the coil used in the Example of this invention. 本発明の実施例で用いるコイルとタブレットと板状タブレットの配置を示す斜視図・The perspective view which shows arrangement | positioning of the coil used in the Example of this invention, a tablet, and a plate-shaped tablet. 本発明の第1の実施例のコイルとタブレットの成形金型での配置を示す上面図。The top view which shows arrangement | positioning with the shaping die of the coil and tablet of 1st Example of this invention. 本発明の第1の実施例の面実装マルチフェーズインダクタの製造工程の一部を示す図3のA−B−C−D組合せ断面に対応する断面図。Sectional drawing corresponding to the ABCD combined cross section of FIG. 3 which shows a part of manufacturing process of the surface mount multiphase inductor of 1st Example of this invention. 本発明の第1の実施例の面実装マルチフェーズインダクタの製造工程の一部を示す図3のA−B−C−D組合せ断面に対応する断面図。Sectional drawing corresponding to the ABCD combined cross section of FIG. 3 which shows a part of manufacturing process of the surface mount multiphase inductor of 1st Example of this invention. 本発明の第1の実施例の面実装マルチフェーズインダクタの製造工程の一部を示す図3のA−B−C−D組合せ断面に対応する断面図。Sectional drawing corresponding to the ABCD combined cross section of FIG. 3 which shows a part of manufacturing process of the surface mount multiphase inductor of 1st Example of this invention. 本発明の第1の実施例のコア部の構造を示す斜視図。The perspective view which shows the structure of the core part of the 1st Example of this invention. 本発明の第1の実施例の面実装マルチフェーズインダクタの斜視図。1 is a perspective view of a surface-mount multiphase inductor according to a first embodiment of the present invention. FIG. 本発明の第1の実施例におけるその他の電極構成を有する面実装マルチフェーズインダクタの斜視図。The perspective view of the surface-mount multiphase inductor which has the other electrode structure in 1st Example of this invention. 本発明の第2の実施例のコイルとタブレットの成型金型での配置を示す上面図。The top view which shows arrangement | positioning with the shaping die of the coil and tablet of 2nd Example of this invention. 本発明の第2の実施例のコア部の構造を示す斜視図。The perspective view which shows the structure of the core part of the 2nd Example of this invention. 本発明の第2の実施例の面実装マルチフェーズインダクタの斜視図。The perspective view of the surface-mount multiphase inductor of the 2nd Example of this invention. 本発明のその他の実施例の面実装マルチフェーズインダクタの構造を示す斜視図。The perspective view which shows the structure of the surface mount multiphase inductor of the other Example of this invention. 本発明のその他の実施例の面実装マルチフェーズインダクタの構造を示す斜視図。The perspective view which shows the structure of the surface mount multiphase inductor of the other Example of this invention.

以下に、図面を参照しながら本発明の面実装マルチフェーズインダクタの製造方法について説明する。   Hereinafter, a method for manufacturing a surface-mounted multiphase inductor according to the present invention will be described with reference to the drawings.

(第1の実施例)
図1〜図9を参照しながら、本発明の第1の実施例の面実装マルチフェーズインダクタの製造方法について説明する。まず、本発明の実施例で用いるコイルについて説明する。図1に本発明の実施例で用いるコイルの斜視図を示す。図1に示すように、平角線を両端部1bが最外周となるように2段の外外巻きに巻回して巻回部1aを形成してコイル1を得る。端部1bは巻回部1aを挟んで対向するように引き出されるようにした。
(First embodiment)
A method for manufacturing the surface-mounted multiphase inductor according to the first embodiment of the present invention will be described with reference to FIGS. First, the coil used in the embodiment of the present invention will be described. FIG. 1 is a perspective view of a coil used in an embodiment of the present invention. As shown in FIG. 1, a coil 1 is obtained by winding a flat wire around two stages of outer and outer windings so that both end portions 1b are at the outermost periphery to form a wound portion 1a. The end portion 1b was pulled out so as to face each other with the winding portion 1a interposed therebetween.

次に、本発明の実施例で用いる封止材について説明する。本実施例では封止材として、鉄系金属磁性粉末とエポキシ樹脂とを混合して粉末状に造粒したものを用いる。本実施例では封止材の透磁率が25となるように鉄系金属磁性粉末の充填量を調整した。この封止材を用いてタブレットを作成する。図2に第1の実施例のコイルとタブレットと板状タブレットの配置関係を示す。タブレット2と板状タブレット3は加圧成型で作成する。本実施例ではタブレット2の強度を高めるために、さらに熱処理をして封止材を半硬化状態とした。図2に示すように、タブレット2はコイル1を囲うように平面部の周縁に2つの柱状凸部2aを有する形状に形成する。コイル1の両端部1bは柱状凸部2aの外側側面に沿うように配置する。   Next, the sealing material used in the examples of the present invention will be described. In this embodiment, a sealing material obtained by mixing iron-based metal magnetic powder and an epoxy resin and granulating the powder is used. In this example, the filling amount of the iron-based metal magnetic powder was adjusted so that the permeability of the sealing material was 25. A tablet is produced using this sealing material. FIG. 2 shows the positional relationship among the coil, tablet, and plate tablet of the first embodiment. The tablet 2 and the plate-like tablet 3 are created by pressure molding. In this example, in order to increase the strength of the tablet 2, the heat treatment was further performed to make the sealing material semi-cured. As shown in FIG. 2, the tablet 2 is formed in a shape having two columnar convex portions 2 a on the periphery of the flat portion so as to surround the coil 1. Both end portions 1b of the coil 1 are arranged along the outer side surface of the columnar convex portion 2a.

次に、第1の実施例の製造方法のコイルとタブレットを成型金型へ配置する工程を説明する。図3と図4に成型金型におけるコイルとタブレットの配置について示す。なお、図4は図3のA−B−C−D組み合わせ断面に対応する断面図である。図3と図4に示すように、第1の実施例では割型ダイ4aと割型ダイ4bとからなるダイ4と、下型6とを有する成型金型を用いる。ダイ4と下型6とを組み合わせることによってキャビティ5が形成される。キャビティ5にコイル1が配置されたタブレット2を2つを装填する。このようにコイル1とタブレット2を配置すれば、コイル1はタブレット2の平面部の厚みによって成型金型内で適正な高さに配置される。そして、コイル1の端部1bは、タブレット2の柱状凸部2aと割型ダイ4aの内壁面もしくはタブレット2の柱状凸部2aと割型ダイ4bの内壁面とで挟まれた状態となり、コイル1の両端部1bが適正な位置で固定される。   Next, the process of arranging the coil and tablet of the manufacturing method of the first embodiment in a molding die will be described. 3 and 4 show the arrangement of coils and tablets in the molding die. FIG. 4 is a cross-sectional view corresponding to the cross section taken along the line ABCD in FIG. As shown in FIGS. 3 and 4, in the first embodiment, a molding die having a die 4 composed of a split die 4a and a split die 4b and a lower die 6 is used. A cavity 5 is formed by combining the die 4 and the lower die 6. Two tablets 2 in which the coil 1 is arranged in the cavity 5 are loaded. If the coil 1 and the tablet 2 are arranged in this way, the coil 1 is arranged at an appropriate height in the molding die depending on the thickness of the flat portion of the tablet 2. And the edge part 1b of the coil 1 will be in the state pinched | interposed by the columnar convex part 2a of the tablet 2, and the inner wall face of the split die 4a, or the columnar convex part 2a of the tablet 2 and the inner wall face of the split die 4b, Both end portions 1b of 1 are fixed at appropriate positions.

次に、第1の実施例の製造方法のコア部を形成する工程を説明する。図5と図6に第1の実施例の製造方法のコア部の成形工程を説明する断面図を示す。なお、図5と図6の断面は図3のA−B−C−D組み合わせ断面に対応する。図5に示すように、コイル1とタブレット2の上に板状タブレット3を2つ配置し、その上にパンチ7をセットして、成型金型を予熱する。本実施例では成型金型を封止材の軟化温度以上に予熱しており、タブレット2と板状タブレット3は軟化状態となるようにした。   Next, the process of forming the core part of the manufacturing method of the first embodiment will be described. 5 and 6 are sectional views for explaining the core part forming step of the manufacturing method of the first embodiment. 5 and 6 correspond to the cross section taken along the line ABCD in FIG. As shown in FIG. 5, two plate-like tablets 3 are arranged on the coil 1 and the tablet 2, and the punch 7 is set thereon, and the molding die is preheated. In this embodiment, the molding die is preheated to a temperature higher than the softening temperature of the sealing material, and the tablet 2 and the plate-like tablet 3 are in a softened state.

次に、サンドブラスト処理を行いバリ取りと露出する両端部1bの被膜を除去し、磁性体コア8の4隅に導電性ペーストをディップ法で被覆し硬化させる。これにより導電性ペーストと内部のコイル1は導通する。最後に、めっき処理を行い導電性ペーストの表面上に外部電極9を形成し、図8に示すような面実装マルチフェーズインダクタを得る。なお、めっき処理によって形成される電極は、Ni、Sn、Cu、Au、Pdなどから1つもしくは複数を適宜選択して形成すれば良い。また、印刷法を用いて導電性ペーストを転写塗布させて、図9に示すようなL字状に外部電極9を形成してもよい。   Next, sandblasting is performed to remove the deburred and exposed coatings on both end portions 1b, and a conductive paste is coated on the four corners of the magnetic core 8 by dipping and cured. As a result, the conductive paste and the internal coil 1 are conducted. Finally, plating is performed to form the external electrode 9 on the surface of the conductive paste, and a surface-mount multiphase inductor as shown in FIG. 8 is obtained. Note that the electrode formed by plating may be formed by appropriately selecting one or a plurality of electrodes such as Ni, Sn, Cu, Au, and Pd. Alternatively, the external electrode 9 may be formed in an L shape as shown in FIG. 9 by transferring and applying a conductive paste using a printing method.

第1の実施例で作成した面実装マルチフェーズインダクタのコイル間の磁気結合係数を求めたところ0.03であり、コイル間の結合は認められなかった。そして、第1の実施例では2つのコイル1を点対称となるように配置した。そのように配置することで、左右の方向性のない構造となる。   The magnetic coupling coefficient between the coils of the surface mount multiphase inductor prepared in the first example was 0.03, and no coupling between the coils was observed. In the first embodiment, the two coils 1 are arranged so as to be point-symmetric. By arranging in such a manner, a structure with no left-right directionality is obtained.

(第2の実施例)
図10〜図12を参照しながら、本発明の面実装マルチフェーズインダクタの第2実施例を説明する。第2の実施例では、第1の実施例と同一構成のコイルと、封止材およびタブレットと、同様の成形金型を用いてコイルを3つ内包した面実装マルチフェーズインダクタを作成する。なお、第1実施例と重複する部分の説明は割愛する。
(Second embodiment)
A second embodiment of the surface-mounted multiphase inductor according to the present invention will be described with reference to FIGS. In the second embodiment, a surface-mount multiphase inductor including three coils is produced using a coil having the same configuration as that of the first embodiment, a sealing material and a tablet, and a similar molding die. In addition, description of the part which overlaps with 1st Example is omitted.

図10に成型金型におけるコイルとタブレットの配置について示す。第2の実施例では第1の実施例と同様に割型ダイ11と割型ダイ12とからなるダイと、下型と、パンチを有する成型金型を用いる。ダイと下型を組み合わせることによってキャビティ13が形成される。第1の実施例と異なる点は、図10に示すように割型ダイ11に凸部11aと割型ダイ12に凸部12aがそれぞれ2つずつ設けられている。キャビティ13にコイル1が配置されたタブレット2を3つを装填する。このとき、ダイの凸部11a、12aが隣り合うタブレット2同士の間になるようにタブレット2とコイルを配置する。このようにすると、凸部11a、12aによって複数のタブレット2の位置だし精度が向上するという効果を奏する。なお、本実施例では3つのコイルは同方向に並列するように配置した。   FIG. 10 shows the arrangement of coils and tablets in the molding die. In the second embodiment, similarly to the first embodiment, a die composed of a split die 11 and a split die 12, a lower die, and a molding die having a punch are used. The cavity 13 is formed by combining the die and the lower die. The difference from the first embodiment is that the split die 11 is provided with two convex portions 11a and the split die 12 is provided with two convex portions 12a as shown in FIG. Three tablets 2 in which the coil 1 is arranged in the cavity 13 are loaded. At this time, the tablet 2 and the coil are arranged so that the convex portions 11a and 12a of the die are between the adjacent tablets 2. If it does in this way, there exists an effect that the positioning accuracy of the some tablet 2 improves by convex part 11a, 12a. In this embodiment, the three coils are arranged in parallel in the same direction.

次に、キャビティ13に秤量した封止材をさらに充填し、型締めした後パンチを用いて圧粉成形し、硬化して図11に示すコア部14を得た。図11に示すように、凸部11a、12aによって、コア部14のコイルの端部1bが露出する側面は凹部14aが2つずつ形成された状態となる。   Next, the cavity 13 was further filled with the weighed sealing material, clamped, compacted with a punch, and cured to obtain the core portion 14 shown in FIG. As shown in FIG. 11, the convex portions 11 a and 12 a are in a state where two concave portions 14 a are formed on the side surface where the end portion 1 b of the coil of the core portion 14 is exposed.

次に、サンドブラスト処理を行いバリ取りと露出する両端部1bの被膜を除去し、磁性体コア14に転写印刷法を用いて内部のコイル1と導通するように導電性ペーストを塗布し、硬化させる。さらに、めっき処理して外部電極15を形成して図12に示すような面実装マルチフェーズインダクタを得る。図12に示すように、コア部14の凹部14aによって容易に分割された外部電極15を形成することができる。これによって、内部のコイルはそれぞれに対応した外部電極を有する構成となる。本実施例では成形金型に凸部を設けてコア部の凹部を作成したが、コア部を切除するような加工を行って形成しても良い。   Next, sandblasting is performed to remove the deburred and exposed coatings on both ends 1b, and a conductive paste is applied to the magnetic core 14 so as to be electrically connected to the internal coil 1 using a transfer printing method, and cured. . Further, the external electrode 15 is formed by plating to obtain a surface mount multiphase inductor as shown in FIG. As shown in FIG. 12, it is possible to form the external electrode 15 that is easily divided by the concave portion 14 a of the core portion 14. As a result, the internal coils have external electrodes corresponding thereto. In this embodiment, the convex portion is provided on the molding die to form the concave portion of the core portion. However, the core portion may be formed by performing a process of cutting the core portion.

第2の実施例で作成した面実装マルチフェーズインダクタのコイル間の磁気結合係数を求めたところ0.03であり、コイル間の結合は認められなかった。なお、本実施例ではコイルを3つ内包する面実装インダクタを作成したが、2つあるいは4つ以上であってもよく、適宜凹部の数を増減させればよい。   When the magnetic coupling coefficient between the coils of the surface-mount multiphase inductor prepared in the second example was determined to be 0.03, no coupling between the coils was observed. In the present embodiment, a surface mount inductor including three coils is created, but it may be two or four or more, and the number of recesses may be increased or decreased as appropriate.

(その他の実施例)
図13と図14を参照しながらその他の実施例について説明する。図13と図14は1つの入力電極と複数の出力電極を有する構成の面実装マルチフェーズインダクタの斜視図を示す。1つの入力電極と複数の出力電極を有する面実装マルチフェーズインダクタを実現させるため、図13に示すように、コア部22の一方の側面だけに任意の数の凹部22aを設けて、1つの入力電極23と複数の出力電極24を有する構成にする。もしくは、図14に示すように、コイル31の端部を隣り合うようにコア部32に露出させ、隣り合うように露出するコイル31の端部の両方と導通するように電極を形成して入力電極33を形成し、他方のコイルの31の端部と導通するようにそれぞれ出力電極34を形成する。
(Other examples)
Other embodiments will be described with reference to FIGS. 13 and 14. 13 and 14 show perspective views of a surface-mount multiphase inductor having a configuration having one input electrode and a plurality of output electrodes. In order to realize a surface-mount multiphase inductor having one input electrode and a plurality of output electrodes, as shown in FIG. 13, an arbitrary number of recesses 22a are provided only on one side surface of the core portion 22, and one input A configuration having an electrode 23 and a plurality of output electrodes 24 is adopted. Alternatively, as shown in FIG. 14, the end portions of the coil 31 are exposed to the core portion 32 so as to be adjacent to each other, and electrodes are formed so as to be electrically connected to both ends of the coil 31 exposed so as to be adjacent to each other. The electrode 33 is formed, and the output electrode 34 is formed so as to be electrically connected to the end portion 31 of the other coil.

上記実施例では、封止材として磁性粉末に鉄系金属磁性粉末、樹脂にエポキシ樹脂を混合し、透磁率が25となるように調製したものを用いた。しかしながら、これに限らず例えば、磁性粉末としてフェライト系磁性粉末などや、絶縁皮膜形成や表面酸化などの表面改質を行った磁性粉末を用いても良い。また、ガラス粉末などの無機物を加えても良い。そして、樹脂としてポリイミド樹脂やフェノール樹脂などの熱硬化性樹脂やポリエチレン樹脂やポリアミド樹脂などの熱可塑性樹脂を用いても良い。   In the above-described example, a sealing material prepared by mixing magnetic powder with iron-based metal magnetic powder and resin with epoxy resin and having a magnetic permeability of 25 was used. However, the present invention is not limited thereto, and for example, ferrite magnetic powder or the like as magnetic powder, or magnetic powder subjected to surface modification such as insulation film formation or surface oxidation may be used. Further, an inorganic substance such as glass powder may be added. Further, a thermosetting resin such as a polyimide resin or a phenol resin, or a thermoplastic resin such as a polyethylene resin or a polyamide resin may be used as the resin.

上記実施例では、コイルとして2段の渦巻き状に巻回したものを用いたが、これに限らず例えば、エッジワイズ巻きや整列巻きに巻回したものや、楕円形だけでなく円形や矩形や台形、半円状、それらを組み合わせた形状に巻回したものでもよい。   In the above embodiment, a coil wound in a two-stage spiral shape is used. However, the coil is not limited to this, for example, an edgewise winding or an aligned winding, not only an ellipse but also a circle, a rectangle, It may be trapezoidal, semicircular, or a combination of them.

上記実施例では、導電性ペーストの塗布方法について、転写法、ディップ法、ポッティング法など最適な方法を適宜選択すれば良い。   In the above embodiment, an optimal method such as a transfer method, a dipping method, or a potting method may be appropriately selected as a method for applying the conductive paste.

上記実施例では、コイルの端部表面の皮膜を剥離する方法としてサンドブラスト処理を用いたが、これに限らず他の機械剥離等の方法を用いても可能である。また、コアを形成する前に予め端部の皮膜を剥離してもよい。   In the above embodiment, sandblasting is used as a method for peeling the film on the end surface of the coil. However, the present invention is not limited to this, and other methods such as mechanical peeling may be used. Moreover, you may peel the film | membrane of an edge part beforehand, before forming a core.

第1の実施例において、板状タブレットを用いたが、板状に限ることなくT型やE型などの形状に予備成形しても良い。また、未硬化状態ではなく半硬化状態でも良い。そして、その成形方法も加圧成形法やシート状成形物から切り出すなど用途に合わせて適宜選択すれば良い。   In the first embodiment, a plate-like tablet is used, but it may be preformed into a shape such as a T shape or an E shape without being limited to a plate shape. Moreover, not a non-hardened state but a semi-hardened state may be sufficient. The molding method may be appropriately selected according to the application such as a pressure molding method or cutting out from a sheet-like molded product.

1:コイル(1a:巻回部、1b:端部)
2:タブレット
3:板状タブレット
4:ダイ(4a、4b:割型ダイ)
5:キャビティ
6:下型
7:パンチ
8:コア部
9:外部電極
11、12:割型ダイ(11a、12a:凸部)
13:キャビティ
14:コア部
14a:凹部
15:外部電極
21、31:コイル
22、32:コア部
22a:凹部
23、33:入力電極
24、34:出力電極
1: Coil (1a: winding part, 1b: end part)
2: Tablet 3: Plate-shaped tablet 4: Die (4a, 4b: Split die)
5: Cavity 6: Lower die 7: Punch 8: Core portion 9: External electrode 11, 12: Split die (11a, 12a: convex portion)
13: Cavity 14: Core 14a: Recess 15: External electrode 21, 31: Coil 22, 32: Core 22a: Recess 23, 33: Input electrode 24, 34: Output electrode

Claims (4)

成型金型を用いて主に樹脂と磁性粉末とからなる封止材で複数のコイルを封止した面実装マルチフェーズインダクタの製造方法において、
導線を両端部が外周に位置する様に巻回して形成された空芯コイルを、該封止材を平板形状の周縁部に柱状凸部を有する形状に予備成形して形成されたタブレットに載置し、該空芯コイルの引き出し端部を該タブレットの柱状凸部の外側側面に沿わせる工程と、
該空芯コイルが載置されたタブレットを、該成型金型内の1つのキャビティに対して複数組、対を構成する空芯コイルの引き出し端部が互いに反対方向に延在し、かつ、それぞれの空芯コイルの引き出し端部が該タブレットの柱状凸部の外側側面と該キャビティの内壁面との間に挟まれる様に配置する工程と、
空芯コイルの引き出し端部が該タブレットの柱状凸部の外側側面と該キャビティの内壁面との間に挟まれた状態で複数の空芯コイルと該封止材を樹脂成形法もしくは圧粉成形法を用いて一体化させて複数の空芯コイルを内蔵するコア部を形成する工程と、
該コア部の表面に該空芯コイルの引き出し部の少なくとも一部が露出する部分と接続する外部電極を該コア部の表面または外周に設ける工程を有することを特徴とする面実装マルチフェーズインダクタの製造方法。
In a method for manufacturing a surface mount multiphase inductor in which a plurality of coils are sealed with a sealing material mainly made of resin and magnetic powder using a molding die,
An air-core coil formed by winding a conducting wire so that both ends are positioned on the outer periphery is placed on a tablet formed by pre-molding the sealing material into a shape having columnar protrusions on a flat peripheral edge. Placing the lead-out end of the air-core coil along the outer side surface of the columnar protrusion of the tablet ;
Plural sets of tablets on which the air- core coils are placed with respect to one cavity in the molding die, and the lead-out ends of the air-core coils constituting the pairs extend in directions opposite to each other, and A step of arranging the lead-out end portion of the air-core coil so as to be sandwiched between the outer side surface of the columnar convex portion of the tablet and the inner wall surface of the cavity ;
A plurality of air-core coils and sealing material of the resin molding method or a powder in a sandwiched state between the outer side and the inner wall surface of the cavity of the columnar protrusions withdrawal end portion of the tablet of the air-core coil Forming a core part that incorporates a plurality of air-core coils by using a molding method; and
Multiphase inductor surface-mounted, characterized in that it comprises the step of providing an external electrode connected to at least a partially exposed portion of the lead portions of the air-core coil on the surface of the core portion to the surface or periphery of the core portion Production method.
型金型を用いて主に樹脂と磁性粉末とからなる封止材で複数のコイルを封止した面実装マルチフェーズインダクタの製造方法において、
導線を両端部が外周に位置する様に巻回して形成された空芯コイルを、該封止材を平板形状の周縁部に柱状凸部を有する形状に予備成形して形成されたタブレットに載置し、該空芯コイルの引き出し端部を該タブレットの柱状凸部の外側側面に沿わせる工程と、
該空芯コイルが載置されたタブレットを、内壁に凸部が設けられた成型金型内の1つのキャビティに対して複数、互いの間に該内壁の凸部が位置し、かつ、それぞれのコイルの引き出し端部が該タブレットの柱状凸部の外側側面と該キャビティの内壁面との間に挟まれる様に配置する工程と、
該空芯コイルの引き出し端部が該タブレットの柱状凸部の外側側面と該キャビティの内壁面との間に挟まれた状態で複数の空芯コイルと該封止材を樹脂成形法もしくは圧粉成形法を用いて一体化させて複数の空芯コイルを内蔵し、少なくとも1つ以上の側面に凹部が設けられたコア部を形成する工程と、
該コア部の表面に該空芯コイルの両端部の少なくとも一部が露出する部分と接続する外部電極を該コア部の表面または外周に設ける工程を有することを特徴とする面実装マルチフェーズインダクタの製造方法。
Mainly in the production method of the resin and magnetic powder and sealed surface mount multiphase inductors a plurality of coils with a sealing material made of using a forming metal mold,
An air-core coil formed by winding a conducting wire so that both ends are positioned on the outer periphery is placed on a tablet formed by pre-molding the sealing material into a shape having columnar protrusions on a flat peripheral edge. Placing the lead-out end of the air-core coil along the outer side surface of the columnar protrusion of the tablet;
A plurality of tablets on which the air-core coil is placed are located in a mold having a convex portion on the inner wall, and the convex portions of the inner wall are positioned between each of the cavities. Arranging the coil drawing end so that it is sandwiched between the outer side surface of the columnar convex portion of the tablet and the inner wall surface of the cavity;
A plurality of air core coils and the sealing material are molded by resin molding or powder compaction in a state where the lead end of the air core coil is sandwiched between the outer side surface of the columnar convex portion of the tablet and the inner wall surface of the cavity. Integrating a plurality of air-core coils by using a molding method, and forming a core portion provided with a recess on at least one side surface; and
A surface-mount multiphase inductor comprising: a step of providing an external electrode on a surface or an outer periphery of the core portion, which is connected to a portion of at least a part of both ends of the air-core coil exposed on the surface of the core portion . Production method.
前記封止材において、
前記磁性粉末が金属磁性粉末からなり、封止材の透磁率が10〜30となるように前記封止材を調製した請求項1または請求項2に記載の面実装マルチフェーズインダクタの製造方法。
In the sealing material,
The method for manufacturing a surface-mount multiphase inductor according to claim 1, wherein the magnetic powder is made of a metal magnetic powder, and the sealing material is prepared so that the magnetic permeability of the sealing material is 10 to 30.
前記外部電極を形成する工程において、
該外部電極に導電性ペーストを用いた請求項1乃至請求項3のいずれかに記載の面実装マルチフェーズインダクタの製造方法。
In the step of forming the external electrode,
The method for manufacturing a surface-mount multiphase inductor according to claim 1, wherein a conductive paste is used for the external electrode.
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Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014033037A (en) * 2012-08-02 2014-02-20 Denso Corp Reactor and manufacturing method of coil used in the same
JP5894119B2 (en) * 2013-06-14 2016-03-23 東光株式会社 Manufacturing method of surface mount inductor
JP6409332B2 (en) * 2014-05-16 2018-10-24 Tdk株式会社 Coil device
JP6112078B2 (en) 2014-07-18 2017-04-12 株式会社村田製作所 Manufacturing method of surface mount inductor
CN106469606A (en) * 2015-08-21 2017-03-01 莱尔德电子材料(深圳)有限公司 Electrical inductor assembly including shield clip
JP2017168472A (en) * 2016-03-14 2017-09-21 株式会社村田製作所 Multilayer substrate
JP6623930B2 (en) * 2016-05-20 2019-12-25 株式会社村田製作所 Common mode filter
JP2019036649A (en) * 2017-08-17 2019-03-07 株式会社村田製作所 Inductor
JP6784269B2 (en) * 2018-03-01 2020-11-11 株式会社村田製作所 Surface mount inductor
KR102204003B1 (en) * 2019-03-15 2021-01-18 삼성전기주식회사 Coil component
JP7078004B2 (en) * 2019-03-28 2022-05-31 株式会社村田製作所 Inductors and their manufacturing methods
JP7442975B2 (en) * 2019-04-05 2024-03-05 株式会社トーキン Reactor and booster circuit
JP7427392B2 (en) 2019-08-27 2024-02-05 株式会社村田製作所 inductor parts
JP7247860B2 (en) 2019-10-25 2023-03-29 株式会社村田製作所 inductor components
JP7247942B2 (en) * 2020-04-14 2023-03-29 株式会社村田製作所 Inductor and manufacturing method thereof
JP7279688B2 (en) * 2020-06-08 2023-05-23 株式会社村田製作所 inductor
JP7226409B2 (en) * 2020-07-31 2023-02-21 株式会社村田製作所 Inductor parts and DCDC converters
CN112509783B (en) * 2020-08-09 2022-04-12 华为数字能源技术有限公司 Power inductor and preparation method thereof, and system-in-package module
WO2023122953A1 (en) * 2021-12-28 2023-07-06 深圳顺络电子股份有限公司 Vertical multiphase inductor and manufacturing method therefor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04257208A (en) * 1991-02-12 1992-09-11 Murata Mfg Co Ltd Coil unit component
JPH08148367A (en) * 1994-11-24 1996-06-07 Tokin Corp Surface-mount electronic component
JP3403861B2 (en) * 1995-04-28 2003-05-06 太陽誘電株式会社 Manufacturing method of chip inductor and inductor array
JP2000106312A (en) * 1998-09-29 2000-04-11 Murata Mfg Co Ltd Composite inductor element
JPWO2004019352A1 (en) * 2002-08-26 2005-12-15 松下電器産業株式会社 Multi-phase magnetic element and manufacturing method thereof
JP2004186550A (en) * 2002-12-05 2004-07-02 Sumitomo Special Metals Co Ltd Inductor
JP4378956B2 (en) * 2003-01-17 2009-12-09 パナソニック株式会社 Choke coil and electronic device using the same
TWI234790B (en) * 2003-06-03 2005-06-21 Traben Co Ltd Inductor element and manufacturing method thereof
JP2006100738A (en) * 2004-09-30 2006-04-13 Taiyo Yuden Co Ltd Surface-mounting coil component
JP4714779B2 (en) * 2009-04-10 2011-06-29 東光株式会社 Manufacturing method of surface mount inductor and surface mount inductor

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