JP2002008922A - Coil part - Google Patents
Coil partInfo
- Publication number
- JP2002008922A JP2002008922A JP2000183212A JP2000183212A JP2002008922A JP 2002008922 A JP2002008922 A JP 2002008922A JP 2000183212 A JP2000183212 A JP 2000183212A JP 2000183212 A JP2000183212 A JP 2000183212A JP 2002008922 A JP2002008922 A JP 2002008922A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- magnetic core
- coil pattern
- thickness
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子機器や電源装
置に用いられる薄型トランスやチョークコイル等のコイ
ル部品に係り、特にコアギャップを必要とするフライバ
ック回路用のトランスやチョークコイルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component such as a thin transformer and a choke coil used for an electronic device and a power supply device, and more particularly to a transformer and a choke coil for a flyback circuit requiring a core gap.
【０００２】[0002]
【従来の技術】最近の電子機器の小型化に伴い、電源用
トランスやチョークコイルにおいても小型化、薄型化が
要求されている。このような要求に応えるべく、ボビン
を使用せず、巻線をプリントコイルにより構成した各種
のトランスやチョークコイルが使用されてきている。2. Description of the Related Art With the recent miniaturization of electronic equipment, there is a demand for miniaturization and thinning of power transformers and choke coils. In order to meet such demands, various transformers and choke coils in which the winding is formed by a printed coil without using a bobbin have been used.
【０００３】この種の従来のトランスの外観図を図１１
（Ａ）に、層構造を図１１（Ｂ）に示す。このコイル部
品は、片面または両面に渦巻き状のコイルパターンが形
成された複数枚の絶縁基材を絶縁層を介して積層し、積
層された基板２０の中心に貫通穴２１をあけ、該基板２
０をＩ型磁性コア２２と、Ｅ型磁性コア２３で挟み、か
つＥ型コア２３の中脚２４を貫通穴２１に挿入して組み
付ける。２５は基板２０に設けたスルーホール２６に挿
着する端子である。FIG. 11 is an external view of a conventional transformer of this kind.
FIG. 11A shows the layer structure. This coil component is formed by laminating a plurality of insulating base materials having a spiral coil pattern formed on one or both sides thereof via an insulating layer, and forming a through hole 21 at the center of the laminated substrate 20.
0 is sandwiched between the I-type magnetic core 22 and the E-type magnetic core 23, and the middle leg 24 of the E-type core 23 is inserted into the through hole 21 and assembled. Reference numeral 25 denotes a terminal to be inserted into a through hole 26 provided in the substrate 20.
【０００４】[0004]
【発明が解決しようとする課題】上述の従来のコイル部
品においては、多層プリント基板２０に貫通穴２１を設
け、その貫通穴２１に磁性コア２３の中脚２４を嵌合し
て構成しているため、貫通穴２１の加工が必要となり、
この穴あけ加工は、貫通穴２１のサイズが大きいため
に、貫通穴２１の形成位置の周辺部にそれぞれレーザ等
により同心状に複数の***をあけてその***の集合によ
り、全体として貫通穴２１をあけるという工程を採用せ
ざるをえず、その穴加工をコイル部品の１個ずつ行う必
要があるので、加工工数が多くなり、コスト高を招くと
いう問題点があった。In the above-mentioned conventional coil component, a through hole 21 is provided in a multilayer printed circuit board 20, and a center leg 24 of a magnetic core 23 is fitted into the through hole 21. Therefore, processing of the through hole 21 is required,
In this drilling process, since the size of the through hole 21 is large, a plurality of small holes are concentrically formed by a laser or the like around the position where the through hole 21 is formed, and the through hole 21 is formed as a whole by collecting the small holes. Inevitably, a step of drilling must be adopted, and the hole must be drilled one by one for each coil component, so that the number of processing steps is increased and the cost is increased.
【０００５】また、トランスなどのコイル部品において
は、Ｅ型磁性コア２３の中脚２４とＩ型コア２２との間
にギャップを形成することにより、コア２２、２３が飽
和しにくい状態で作動するように構成している。しかし
このギャップの部分から発生する漏れ磁束がギャップ近
傍のコイルを発熱させることが一般に知られている。そ
こでこの漏れ磁束を少なくするために、ギャップ近傍の
コイルを中脚から離すか、またはギャップ周辺部にコイ
ルを設けない等の対策をとることが必要となり、これら
のことがコイル部品の小型化の妨げとなっている。Further, in a coil component such as a transformer, a gap is formed between the middle leg 24 of the E-shaped magnetic core 23 and the I-shaped core 22 so that the cores 22 and 23 are operated in a state where they are hardly saturated. It is configured as follows. However, it is generally known that the leakage magnetic flux generated from the gap generates heat in the coil near the gap. Therefore, in order to reduce this leakage flux, it is necessary to take measures such as separating the coil near the gap from the center leg or not providing a coil around the gap. Hindered.
【０００６】本発明は、上記した問題点に鑑み、プリン
トコイルパターンを用いたコイル部品において、コアの
中脚挿入のための貫通穴の加工を不要とすることにより
コスト低減が可能となり、かつ前記ギャップによるコイ
ルの発熱の問題が低減されて小型化できる構成のコイル
部品を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to reduce the cost of a coil component using a printed coil pattern by eliminating the need for machining a through hole for inserting a center leg of a core. It is an object of the present invention to provide a coil component having a configuration in which the problem of heat generation of the coil due to the gap can be reduced and the size can be reduced.
【０００７】[0007]
【課題を解決するための手段】請求項１のコイル部品
は、絶縁基材の表裏面に８０〜３００μｍの厚さにプリ
ントコイルパターンを形成し、前記表裏面のコイルパタ
ーンの中央部に、前記コイルパターンの厚さとほぼ同じ
かあるいはやや薄い第１の磁性コアを前記絶縁基材を挟
んで配置し、前記コイルパターンを有する絶縁基材およ
び第１の磁性コアを絶縁材で覆うように接合して基板を
構成し、前記第１の磁性コアと共に磁路を構成する第２
の磁性コアを前記基板に組み付けたことを特徴とする。According to a first aspect of the present invention, there is provided a coil component, wherein a printed coil pattern having a thickness of 80 to 300 μm is formed on the front and rear surfaces of an insulating base material, and the printed pattern is formed at the center of the coil pattern on the front and rear surfaces. A first magnetic core having a thickness substantially equal to or slightly smaller than the thickness of the coil pattern is disposed with the insulating base material interposed therebetween, and the first magnetic core having the coil pattern and the first magnetic core are joined so as to be covered with an insulating material. To form a substrate, and to form a magnetic path together with the first magnetic core.
Wherein the magnetic core is assembled to the substrate.
【０００８】請求項２のコイル部品は、複数枚の絶縁基
材の表裏面にそれぞれ８０〜３００μｍの厚さにプリン
トコイルパターンを形成し、前記表裏面のコイルパター
ンの中央部に、コイルパターンの厚さとほぼ同じ厚さま
たはやや薄い第１の磁性コアを前記絶縁基材を挟んで配
置し、前記コイルパターンおよび第１の磁性コアを有す
る複数のコイルユニットを、絶縁材を介して積層すると
共に、最上層、最下層を絶縁材で覆って基板を構成し、
前記第１の磁性コアと共に磁路を構成する第２の磁性コ
アを前記基板に組み付けたことを特徴とする。According to a second aspect of the present invention, there is provided the coil component, wherein a printed coil pattern is formed on each of the front and back surfaces of the plurality of insulating base materials to a thickness of 80 to 300 μm, and the center of the coil pattern on the front and back surfaces is provided with the coil pattern. A first magnetic core having substantially the same thickness as or slightly thinner than the first magnetic core is disposed with the insulating base material interposed therebetween, and a plurality of coil units having the coil pattern and the first magnetic core are laminated with an insulating material interposed therebetween. , The top layer and the bottom layer are covered with an insulating material to form a substrate,
A second magnetic core forming a magnetic path together with the first magnetic core is assembled to the substrate.
【０００９】請求項１、２のように、磁性コアを積層体
でなる基板の一部に内蔵させることにより、磁性コアの
中脚挿入用の貫通穴の加工が不要となる。第１の磁性コ
アは積層体の一部として構成できるので、第１の磁性コ
アを多数取りにより同時に積層することができる。As described in the first and second aspects, the magnetic core is incorporated in a part of the substrate made of the laminated body, so that the processing of the through hole for inserting the middle leg of the magnetic core becomes unnecessary. Since the first magnetic core can be configured as a part of the laminated body, a large number of first magnetic cores can be simultaneously laminated.
【００１０】また、積層体でなる基板の内部に第１の磁
性コアが配置されるので、第２の磁性コアとの間のギャ
ップが分散され、漏れ磁束によるコイルの発熱も大幅に
減少する。このため、コアを大型にして磁束を減らした
り、ギャップとコイルとの間に空間を設ける必要がなく
なり、小型化が可能となる。[0010] Further, since the first magnetic core is disposed inside the substrate made of the laminated body, the gap between the first magnetic core and the second magnetic core is dispersed, and the heat generation of the coil due to the leakage magnetic flux is greatly reduced. For this reason, it is not necessary to reduce the magnetic flux by increasing the size of the core, or to provide a space between the gap and the coil, thereby enabling downsizing.
【００１１】請求項３のコイル部品は、複数枚の絶縁基
材の表裏面に８０〜３００μｍの厚さにプリントコイル
パターンを形成し、前記コイルパターンを有する複数枚
の絶縁基材を、対向するコイルパターンの合計の厚さよ
り大きい厚さの第３の磁性コアを、コイルパターンの中
央部に介在させて積層し、該積層体の表裏面に、コイル
パターンの厚さとほぼ同じ厚さまたはやや薄い第１の磁
性コアをコイルパターンの中央部に配置し、さらに積層
体の表裏面を絶縁材により覆って基板を構成し、前記第
１、第３の磁性コアと共に磁路を構成する第２の磁性コ
アを前記基板に組み付けたことを特徴とする。According to a third aspect of the present invention, in the coil component, a printed coil pattern having a thickness of 80 to 300 μm is formed on the front and back surfaces of the plurality of insulating bases, and the plurality of insulating bases having the coil pattern are opposed to each other. A third magnetic core having a thickness greater than the total thickness of the coil pattern is laminated with the central portion of the coil pattern interposed therebetween, and on the front and back surfaces of the laminate, the thickness is substantially the same as or slightly smaller than the thickness of the coil pattern. A first magnetic core is disposed at the center of the coil pattern, and a front and back surface of the laminate is covered with an insulating material to form a substrate, and a second magnetic path is formed together with the first and third magnetic cores. A magnetic core is assembled to the substrate.
【００１２】このように、コイルパターンの中心部に、
対向するコイルパターンの合計厚さよりも厚い第３の磁
性コアを挟むことにより、コイルユニット間の絶縁材が
不要になり、コイルユニット間の第３の磁性コアが１つ
ですむ。また、第３の磁性コアの厚さによりコイルパタ
ーンの間隔が調整できる。ただし、対向するコイルパタ
ーン間の絶縁材は必要になる。Thus, at the center of the coil pattern,
By sandwiching the third magnetic core that is thicker than the total thickness of the opposing coil patterns, an insulating material between the coil units becomes unnecessary, and only one third magnetic core between the coil units is required. Further, the interval between the coil patterns can be adjusted by the thickness of the third magnetic core. However, an insulating material between the opposing coil patterns is required.
【００１３】請求項４のコイル部品は、請求項３のコイ
ル部品において、前記対向するコイルパターン間を絶縁
する絶縁性の樹脂を封入したことを特徴とする。According to a fourth aspect of the present invention, there is provided a coil component according to the third aspect, wherein an insulating resin for insulating the opposed coil patterns from each other is sealed.
【００１４】このように、対向するコイルパターン間に
樹脂を封入する構造とすれば、コイルパターン上に絶縁
材を塗布する場合に比較し、絶縁処理が簡単でずむ。As described above, the structure in which the resin is sealed between the opposing coil patterns makes the insulation process simpler than in the case where an insulating material is applied on the coil patterns.
【００１５】[0015]
【発明の実施の形態】図１（Ａ）は本発明のコイル部品
の一実施の形態であるチョークコイル（インダクタ）を
示す斜視図、図１（Ｂ）はその分解斜視図、図２（Ａ）
はその基板の層構造図、図２（Ｂ）はこのコイル部品の
断面図である。FIG. 1A is a perspective view showing a choke coil (inductor) as an embodiment of a coil component of the present invention, FIG. 1B is an exploded perspective view thereof, and FIG. )
Is a layer structure diagram of the substrate, and FIG. 2B is a sectional view of the coil component.
【００１６】図１（Ａ）、（Ｂ）において、１は積層構
造の基板、２、３はそれぞれ基板１に外側から組み付け
るＩ型磁性コアおよびＣ型磁性コア、４は基板１に設け
たスルーホール１ａに挿着して固定する端子である。図
２（Ａ）、（Ｂ）において、５は樹脂等でなる絶縁基
材、６はそれぞれ該絶縁基材５の表裏面に形成された渦
巻き状のコイルパターンであり、これらのコイルパター
ン６、６はその内周側において、絶縁基材５のスルーホ
ールに設けた導体７によって接続される。表裏面のコイ
ルパターン６、６の引き出し部６ｘ、６ｙは、表裏面の
端部に形成された端子挿着用スルーホールを形成する複
数のランド８の異なる位置のものにそれぞれ一体に接続
される。1A and 1B, reference numeral 1 denotes a substrate having a laminated structure, reference numerals 2 and 3 denote an I-type magnetic core and a C-type magnetic core which are respectively assembled to the substrate 1 from the outside, and 4 denotes a through-hole provided on the substrate 1. This terminal is inserted into and fixed to the hole 1a. 2A and 2B, reference numeral 5 denotes an insulating base made of resin or the like, and reference numeral 6 denotes a spiral coil pattern formed on the front and back surfaces of the insulating base 5, respectively. 6 is connected on its inner peripheral side by a conductor 7 provided in a through hole of the insulating base material 5. The lead portions 6x, 6y of the coil patterns 6, 6 on the front and back surfaces are integrally connected to different positions of a plurality of lands 8 forming terminal insertion through holes formed at the end portions of the front and back surfaces.
【００１７】９は絶縁基材５の表裏面におけるコイルパ
ターン６、６の中央部に配置する第１の磁性コアであ
る。該第１の磁性コア９の厚さは、コイルパターン６の
厚さとほぼ同じかあるいはやや薄く形成される。１０は
コイルパターン６および第１の磁性コア９を覆うよう
に、絶縁基材５の表裏面に配置して接合する絶縁材であ
る。該絶縁材１０は絶縁基材５側に加熱圧着により接合
しうる絶縁性のプリプレグを用いることができる。ま
た、この絶縁材１０として、シート状のものではなく、
コイルパターンや第１の磁性コア９を設けた絶縁基材５
上に塗布により絶縁層を形成する絶縁材料を用いてもよ
い。Reference numeral 9 denotes a first magnetic core disposed at the center of the coil patterns 6 on the front and back surfaces of the insulating base 5. The thickness of the first magnetic core 9 is substantially the same as or slightly smaller than the thickness of the coil pattern 6. Reference numeral 10 denotes an insulating material which is disposed on the front and back surfaces of the insulating base material 5 so as to cover the coil pattern 6 and the first magnetic core 9 and is joined. As the insulating material 10, an insulating prepreg that can be bonded to the insulating base material 5 by heating and pressure bonding can be used. The insulating material 10 is not a sheet-like material,
Insulating base material 5 provided with coil pattern and first magnetic core 9
An insulating material which forms an insulating layer by coating may be used.
【００１８】このコイル部品の絶縁基材５およびコイル
パターン６、第１の磁性コア９および絶縁材１０は、積
層工程が終了するまでは多数のコイル部品分に相当する
要素が同一面上に同時に形成される。前記コイルパター
ン６は、例えば特開平１１−２０４３６１号に記載のよ
うに、ガラスエポキシ樹脂やセラミック等でなる絶縁基
材５上に下地薄膜層とその上のレジストを形成し、レジ
ストを小幅の溝のコイルパターン状に除去し、レジスト
を除去した溝部分とその近傍部上に、溝幅より拡大され
た断面形状がマッシュルーム状のコイルパターンを形成
する方法を用いることが、コイルパターン６の半径方向
の間隔を精度良く設定しかつ狭くし、かつコイルパター
ン６の断面積を大きくして電流容量を大きくする意味に
おいて有効である。The insulating substrate 5 and coil pattern 6, the first magnetic core 9 and the insulating material 10 of the coil component have elements corresponding to a large number of coil components on the same surface at the same time until the laminating step is completed. It is formed. For example, as described in JP-A-11-204361, the coil pattern 6 is formed by forming a base thin film layer and a resist thereon on an insulating base material 5 made of glass epoxy resin, ceramic, or the like, and forming the resist into a narrow groove. It is possible to use a method of forming a mushroom-shaped coil pattern having a cross-sectional shape larger than the groove width on the groove portion where the resist has been removed and on the vicinity thereof, in the radial direction of the coil pattern 6. Are accurately set and narrowed, and the current capacity is increased by increasing the cross-sectional area of the coil pattern 6.
【００１９】また、第１の磁性コア９はフェライト成形
品あるいは絶縁膜で被覆した金属製のもの等が用いられ
る。これらの第１の磁性コア９は、例えば治具の表面に
縦横に凹部等のセット部にセットしておき、その表面に
接着剤を塗布し、その上にコイルパターン６の中央部を
対向させて接合する方法を用いることができる。また、
絶縁材１０に第１の磁性コア９を一定の縦横ピッチで配
置しておき、第１の磁性コア９側の面をコイルパターン
６の形成面の各中央部に対向させて接合することによ
り、コイルパターン６の中央部に配置することができ
る。As the first magnetic core 9, a ferrite molded product or a metal coated with an insulating film is used. These first magnetic cores 9 are set, for example, vertically and horizontally on a surface of a jig in a set portion such as a concave portion, an adhesive is applied to the surface, and a center portion of the coil pattern 6 is placed on the surface. Can be used. Also,
By arranging the first magnetic cores 9 at a constant vertical and horizontal pitch on the insulating material 10 and joining the surface of the first magnetic core 9 to the center of the surface on which the coil pattern 6 is formed, It can be arranged at the center of the coil pattern 6.
【００２０】なお、絶縁基材５の厚みは一例として６０
μｍ、コイルパターン６の厚さは２００μｍが採用され
る。コイル部品を薄型に構成し、かつ電流容量を確保す
る意味においては、絶縁基材５の厚みは１０μｍ〜２０
０μｍ、コイルパターン６の厚さは８０μｍ〜３００μ
ｍとすることが好ましい。また、本例においては、第１
の磁性コア９の厚みはコイルパターン６の厚みと同じく
２００μｍに設定した。この第１の磁性コア９の厚み
は、コイルパターン６の厚さとほぼ同じかあるいはやや
薄く設定すればよい。The thickness of the insulating substrate 5 is, for example, 60
μm, and the thickness of the coil pattern 6 is 200 μm. In order to make the coil component thin and secure the current capacity, the thickness of the insulating base 5 is 10 μm to 20 μm.
0 μm, thickness of coil pattern 6 is 80 μm to 300 μm
m is preferable. In this example, the first
The thickness of the magnetic core 9 was set to 200 μm similarly to the thickness of the coil pattern 6. The thickness of the first magnetic core 9 may be set to be substantially the same as or slightly smaller than the thickness of the coil pattern 6.
【００２１】前記のように構成される基板１に、Ｉ型磁
性コア２およびＣ型磁性コア３（これらを以下第２の磁
性コアと称す）を組み付けて接着剤あるいはテープ等に
よって固定する。An I-type magnetic core 2 and a C-type magnetic core 3 (hereinafter, referred to as a second magnetic core) are assembled on the substrate 1 having the above-described structure and fixed with an adhesive or a tape.
【００２２】このように、基板１の内部に第１の磁性コ
ア９を設ける構造とすれば、第１の磁性コア９と第２の
磁性コア２、３間のギャップを絶縁材１０によって形成
することができ、基板１にコア挿入用の貫通穴を設ける
必要がない。このため、工数が削減される。また、第２
の磁性コア２、３と第１の磁性コア９との間にそれぞれ
ギャップが形成され、ギャップが分散形成されるので、
それぞれのギャップを小さくすることができ、漏洩磁束
によるコイルパターン６の発熱を低減することができ、
コイルパターン６を第１の磁性コア９に近接配置するこ
とができるので、小型化が図れる。As described above, with the structure in which the first magnetic core 9 is provided inside the substrate 1, the gap between the first magnetic core 9 and the second magnetic cores 2, 3 is formed by the insulating material 10. It is not necessary to provide a through hole for inserting a core in the substrate 1. Therefore, the number of steps is reduced. Also, the second
Gaps are respectively formed between the magnetic cores 2 and 3 and the first magnetic core 9, and the gaps are dispersedly formed.
Each gap can be reduced, and the heat generation of the coil pattern 6 due to the leakage magnetic flux can be reduced.
Since the coil pattern 6 can be arranged close to the first magnetic core 9, the size can be reduced.
【００２３】図３は本発明のコイル部品の他の実施の形
態を示す層構造図である。本実施の形態は、薄型トラン
スとして構成されるもので、絶縁基材５Ａの表裏面に、
内周側でスルーホール導体により接続されるコイルパタ
ーン６Ａを形成したコイルユニットと、絶縁基材５Ｂの
表裏面にコイルパターン６Ｂを形成したコイルユニット
（本例の表裏面のコイルパターン６Ｂの両端は表裏面の
ランド８に接続され、かつランド８を貫通する端子４に
より共通に並列に接続されるが、前記スルーホール導体
７により直列に接続される構造としてもよい。）と、絶
縁基材５Ｃの表裏面に、内周側でスルーホール導体７に
より接続されるコイルパターン６Ｃを形成したコイルユ
ニットとを、それぞれのコイルパターン６Ａ〜６Ｃの中
央に第１の磁性コア９を配置し、かつ各コイルユニット
間に絶縁材１０を介在させ、さらに、これら複数枚のコ
イルユニットの表裏面を絶縁材１０で覆って積層し、一
体に固着して基板を構成したものである。該基板には前
記第１の磁性コア９と共に磁路を形成する第２の磁性コ
ア２、３が組み付けられる。FIG. 3 is a layer structure diagram showing another embodiment of the coil component of the present invention. The present embodiment is configured as a thin transformer, and is provided on the front and back surfaces of the insulating base material 5A.
A coil unit formed with a coil pattern 6A connected by a through-hole conductor on the inner peripheral side, and a coil unit formed with a coil pattern 6B on the front and back surfaces of an insulating base material 5B (both ends of the coil pattern 6B on the front and back surfaces in this example are It is connected to the lands 8 on the front and back surfaces, and is commonly connected in parallel by the terminals 4 passing through the lands 8, but may be connected in series by the through-hole conductors 7) and the insulating base material 5C. And a coil unit having a coil pattern 6C connected by a through-hole conductor 7 on the inner peripheral side on the front and back surfaces of the first and second coil patterns 6A to 6C. The insulating material 10 is interposed between the coil units, and the front and back surfaces of the plurality of coil units are covered with the insulating material 10 and laminated, and integrally fixed. Are those that you configured. Second magnetic cores 2 and 3 forming a magnetic path together with the first magnetic core 9 are assembled to the substrate.
【００２４】この構成において、コイルパターン６Ａ〜
６Ｃのいずれかを一次巻線として用い、他を二次巻線と
して用いる。このように、本発明においては、用途に応
じてコイルユニットの積層枚数が設定される。In this configuration, the coil patterns 6A to 6A
6C is used as a primary winding and the other is used as a secondary winding. Thus, in the present invention, the number of stacked coil units is set according to the application.
【００２５】図４は本発明によるコイル部品の他の実施
の形態を示す層構造図、図５はその断面図である。図中
５Ａ〜５Ｃは前述のように表裏面が互いに接続されるコ
イルパターン６Ａ〜６Ｃを設けた絶縁基材である。１１
は各コイルユニット間において、コイルパターン６Ａ〜
６Ｃの中央部に配置して介在させる第３の磁性コアであ
る。FIG. 4 is a layer structure diagram showing another embodiment of the coil component according to the present invention, and FIG. 5 is a sectional view thereof. 5A to 5C in the figure are insulating base materials provided with the coil patterns 6A to 6C whose front and back surfaces are connected to each other as described above. 11
Are coil patterns 6A to
This is a third magnetic core disposed at the center of 6C and interposed therebetween.
【００２６】前記第３の磁性コア１１は、対向するコイ
ルパターン６Ａと６Ｂ、または６Ｂと６Ｃの合計の厚さ
より大きい厚さに設定される。一例として、コイルパタ
ーン６Ａ〜６Ｃの厚さは２００μｍとし、第３の磁性コ
ア１１の厚みは４６０μｍとした。従って、これらのコ
イルユニットを積層したとき、コイルパターン６Ａ、６
Ｂ間、または６Ｂ、６Ｃ間に約６０μｍの間隔が形成さ
れる。The thickness of the third magnetic core 11 is set to be larger than the total thickness of the opposing coil patterns 6A and 6B or 6B and 6C. As an example, the thickness of the coil patterns 6A to 6C is 200 μm, and the thickness of the third magnetic core 11 is 460 μm. Therefore, when these coil units are stacked, the coil patterns 6A, 6A
An interval of about 60 μm is formed between B or between 6B and 6C.
【００２７】第１の磁性コア９は、最上層の絶縁基材５
Ａの上面中央と、最下層の絶縁基材５Ｃの下面中央にそ
れぞれ配置される。本例においては、第１の磁性コア９
の厚さは、コイルパターン６Ａ、６Ｃの厚みと同じく２
００μｍとした。これら最上層のコイルパターン６Ａお
よび第１の磁性コア９の上面と、最下層のコイルパター
ン６Ｃの下面は、それぞれ絶縁材１０により覆われる。
各コイルユニット間には、積層体を個々のチップに切断
する前に真空状態で流動状の樹脂１２を封入し硬化させ
ることにより、対向するコイルパターン６Ａと６Ｂ、６
Ｂと６Ｃ間が絶縁される。そしてこれらのコイルユニッ
トを第１の磁性コア９や上下の絶縁材１０と共に一体化
することにより基板が構成される。The first magnetic core 9 is provided on the uppermost insulating base material 5.
A is arranged at the center of the upper surface and at the center of the lower surface of the lowermost insulating base material 5C. In this example, the first magnetic core 9
Is the same as the thickness of the coil patterns 6A and 6C.
It was set to 00 μm. The upper surface of the uppermost coil pattern 6A and the first magnetic core 9 and the lower surface of the lowermost coil pattern 6C are covered with an insulating material 10, respectively.
Before cutting the laminated body into individual chips, the flow resin 12 is sealed and cured in a vacuum state between the coil units, so that the opposing coil patterns 6A, 6B, 6
B and 6C are insulated. A substrate is formed by integrating these coil units together with the first magnetic core 9 and the upper and lower insulating materials 10.
【００２８】このように構成した基板に、前記した構造
の第２の磁性コア２、３を組み付けることにより、第２
の磁性コア２、３と前記第１の磁性コア９、第３の磁性
コア１１と共に磁路を構成する。By assembling the second magnetic cores 2 and 3 having the above-mentioned structure on the substrate thus configured,
And the first magnetic core 9 and the third magnetic core 11 constitute a magnetic path.
【００２９】このように、コイルパターンの中心部に、
対向するコイルパターン６Ａと６Ｂ、または６Ｂと６Ｃ
の合計厚さよりも厚い第３の磁性コア１１を挟むことに
より、コイルユニット間の絶縁材が不要になり、コイル
ユニット間の第３の磁性コア１１が１つですみ、部品点
数が低減する。また、対向するコイルパターン間の絶縁
は、封入される樹脂１２により容易に行える。また、第
３の磁性コアの厚さによりコイルパターンの間隔が調整
できる。Thus, at the center of the coil pattern,
Opposite coil patterns 6A and 6B, or 6B and 6C
By sandwiching the third magnetic core 11 which is thicker than the total thickness, the insulating material between the coil units becomes unnecessary, and only one third magnetic core 11 between the coil units is required, and the number of parts is reduced. In addition, insulation between the opposing coil patterns can be easily performed by the encapsulated resin 12. Further, the interval between the coil patterns can be adjusted by the thickness of the third magnetic core.
【００３０】図６（Ａ）は本発明のコイル部品の他の実
施の形態であるチョークコイルを示す斜視図、（Ｂ）は
その分解斜視図、図７はその層構造図、図８はその断面
図である。本実施の形態は、図１に示した第２の磁性コ
ア３の側脚３ａを無くし、その代わりに基板１Ａに内蔵
される第４の磁性コア１３を、絶縁基材５上の表裏面に
おけるコイルパターン６の外周側に配置したものであ
る。図６〜図８において、図１、図２と同じ符号は同じ
機能を発揮する部品を示す。FIG. 6A is a perspective view showing a choke coil according to another embodiment of the coil component of the present invention, FIG. 6B is an exploded perspective view thereof, FIG. 7 is a layer structure diagram thereof, and FIG. It is sectional drawing. In the present embodiment, the side legs 3a of the second magnetic core 3 shown in FIG. 1 are eliminated, and the fourth magnetic core 13 built in the substrate 1A is replaced by It is arranged on the outer peripheral side of the coil pattern 6. 6 to 8, the same reference numerals as those in FIGS. 1 and 2 indicate components that perform the same functions.
【００３１】本実施の形態においては、コイル部品の中
央部における第１の磁性コア１０と第２の磁性コア２、
３Ａとの間にギャップが形成されるのみならず、側面部
においても第２の磁性コア２、３Ａと第４の磁性コア１
３との間にもギャップが形成される。In the present embodiment, the first magnetic core 10 and the second magnetic core 2 at the center of the coil component,
3A, the second magnetic cores 2 and 3A and the fourth magnetic core 1
3 is also formed.
【００３２】図９は、第４の磁性コア１３を有する構造
を、図３に示したように、コイルユニット間に絶縁材１
０を介在させて積層した構造に適用した例を示す層構造
図である。FIG. 9 shows a structure having the fourth magnetic core 13 as shown in FIG.
FIG. 9 is a layer structure diagram showing an example applied to a structure in which layers are interposed with zeros interposed therebetween.
【００３３】図１０は、第４の磁性コア１３を有する構
造を、図４、図５に示したように、コイルユニット間に
第３の磁性コア１１を介在させて積層した構造に適用し
た例を示す層構造図である。FIG. 10 shows an example in which the structure having the fourth magnetic core 13 is applied to a structure in which the third magnetic core 11 is interposed between coil units as shown in FIGS. FIG.
【００３４】[0034]
【発明の効果】請求項１、２によれば、第２の磁性コア
磁性コアを積層体でなる基板の一部に内蔵させたので、
磁性コアの中脚挿入用の貫通穴の加工が不要となる。こ
のため、工数削減が可能になり、コスト低減に寄与す
る。According to the first and second aspects of the present invention, the second magnetic core is built in a part of the substrate made of the laminated body.
The processing of the through hole for inserting the center leg of the magnetic core becomes unnecessary. Therefore, man-hours can be reduced, which contributes to cost reduction.
【００３５】また、積層体でなる基板の内部に第１の磁
性コアが配置されるので、第２の磁性コアとの間のギャ
ップが分散され、漏れ磁束によるコイルの発熱も大幅に
減少する。このため、コアを大型にして磁束を減らした
り、ギャップとコイルとの間に空間を設ける必要がなく
なり、小型化が可能となる。Further, since the first magnetic core is arranged inside the substrate made of the laminated body, the gap between the first magnetic core and the second magnetic core is dispersed, and the heat generation of the coil due to the leakage magnetic flux is greatly reduced. For this reason, it is not necessary to reduce the magnetic flux by increasing the size of the core, or to provide a space between the gap and the coil, thereby enabling downsizing.
【００３６】請求項３によれば、コイルユニット間に、
対向するコイルパターンの合計厚さよりも厚い第３の磁
性コアを挟む構造としたので、コイルユニット間の絶縁
材が不要になり、コイルユニット間の第３の磁性コアが
１つですみ、前記効果に加え、さらに部品点数の削減が
図れる。According to the third aspect, between the coil units,
Since the third magnetic core thicker than the total thickness of the opposing coil patterns is sandwiched between the coil units, there is no need for an insulating material between the coil units, and only one third magnetic core between the coil units is required. In addition, the number of parts can be further reduced.
【００３７】請求項４によれば、請求項３において、対
向するコイルパターン間に樹脂を封入する構造としたの
で、コイルパターン上に絶縁材を塗布する場合に比較
し、絶縁処理が簡単となる。According to the fourth aspect of the present invention, the resin is sealed between the opposed coil patterns in the third aspect, so that the insulating process is simplified as compared with the case where an insulating material is applied on the coil pattern. .
【図１】（Ａ）は本発明のコイル部品の一実施の形態で
あるチョークコイル（インダクタ）を示す斜視図、
（Ｂ）はその分解斜視図である。FIG. 1A is a perspective view showing a choke coil (inductor) which is an embodiment of a coil component of the present invention,
(B) is an exploded perspective view thereof.
【図２】（Ａ）は図１のコイル部品の基板の層構造図、
（Ｂ）はこのコイル部品の断面図である。。FIG. 2A is a diagram showing a layer structure of a substrate of the coil component of FIG. 1;
(B) is a sectional view of the coil component. .
【図３】本発明のコイル部品の他の実施の形態であるト
ランスを示す層構造図である。FIG. 3 is a layer structure diagram showing a transformer as another embodiment of the coil component of the present invention.
【図４】本発明のコイル部品の他の実施の形態であるト
ランスを示す層構造図である。FIG. 4 is a layer structure diagram showing a transformer according to another embodiment of the coil component of the present invention.
【図５】図４のトランスの断面図である。FIG. 5 is a cross-sectional view of the transformer of FIG.
【図６】（Ａ）は本発明のコイル部品の他の実施の形態
であるチョークコイル（インダクタ）を示す斜視図、
（Ｂ）はその分解斜視図である。FIG. 6A is a perspective view showing a choke coil (inductor) according to another embodiment of the coil component of the present invention,
(B) is an exploded perspective view thereof.
【図７】本発明のコイル部品の他の実施の形態であるト
ランスを示す層構造図である。FIG. 7 is a layer structure diagram showing a transformer according to another embodiment of the coil component of the present invention.
【図８】図７のトランスの断面図である。FIG. 8 is a sectional view of the transformer of FIG. 7;
【図９】本発明のコイル部品の他の実施の形態であるト
ランスを示す層構造図である。FIG. 9 is a layer structure diagram showing a transformer as another embodiment of the coil component of the present invention.
【図１０】本発明のコイル部品の他の実施の形態である
トランスを示す層構造図である。FIG. 10 is a layer structure diagram showing a transformer as another embodiment of the coil component of the present invention.
【図１１】（Ａ）は従来のコイル部品を示す斜視図、
（Ｂ）はその分解斜視図である。FIG. 11A is a perspective view showing a conventional coil component,
(B) is an exploded perspective view thereof.
１、１Ａ：基板、１ａ：スルーホール、２、３、３Ａ：
第２の磁性コア、４：端子、５、５Ａ〜５Ｃ：絶縁基
材、６、６Ａ〜６Ｃ：コイルパターン、７：スルーホー
ル導体、８：ランド、９：第１の磁性コア、１０：絶縁
材、１１：第３の磁性コア、１２：封入樹脂、１３：第
４の磁性コア1, 1A: substrate, 1a: through hole, 2, 3, 3A:
Second magnetic core, 4: terminal, 5, 5A to 5C: insulating base material, 6, 6A to 6C: coil pattern, 7: through-hole conductor, 8: land, 9: first magnetic core, 10: insulating Material, 11: third magnetic core, 12: encapsulating resin, 13: fourth magnetic core
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｆ 37/00 Ｈ０１Ｆ 15/02 Ｄ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01F 37/00 H01F 15/02 D
Claims (4)
さにプリントコイルパターンを形成し、 前記表裏面のコイルパターンの中央部に、コイルパター
ンの厚さとほぼ同じ厚さまたはやや薄い第１の磁性コア
を前記絶縁基材を挟んで配置し、 前記コイルパターンを有する絶縁基材および第１の磁性
コアを絶縁材で覆って基板を構成し、 前記第１の磁性コアと共に磁路を構成する第２の磁性コ
アを前記基板に組み付けたことを特徴とするコイル部
品。1. A printed coil pattern having a thickness of 80 to 300 μm is formed on the front and back surfaces of an insulating base material, and a thickness substantially equal to or slightly smaller than the thickness of the coil pattern is formed at the center of the coil pattern on the front and back surfaces. A first magnetic core is disposed with the insulating base material interposed therebetween, a substrate is formed by covering the insulating base material having the coil pattern and the first magnetic core with an insulating material, and a magnetic path is formed together with the first magnetic core. A coil component, wherein a second magnetic core to be configured is mounted on the substrate.
〜３００μｍの厚さにプリントコイルパターンを形成
し、 前記表裏面のコイルパターンの中央部に、コイルパター
ンの厚さとほぼ同じ厚さまたはやや薄い第１の磁性コア
を前記絶縁基材を挟んで配置し、 前記コイルパターンおよび第１の磁性コアを有する複数
のコイルユニットを、絶縁材を介して積層すると共に、
最上層、最下層を絶縁材で覆って基板を構成し、 前記第１の磁性コアと共に磁路を構成する第２の磁性コ
アを前記基板に組み付けたことを特徴とするコイル部
品。2. The method according to claim 1, wherein each of the plurality of insulating substrates has an 80
A printed coil pattern having a thickness of about 300 μm is formed, and a first magnetic core having substantially the same thickness as or slightly thinner than the thickness of the coil pattern is disposed at the center of the coil pattern on the front and back surfaces with the insulating base material interposed therebetween. And a plurality of coil units having the coil pattern and the first magnetic core are laminated with an insulating material interposed therebetween.
A coil component, wherein a substrate is formed by covering an uppermost layer and a lowermost layer with an insulating material, and a second magnetic core forming a magnetic path together with the first magnetic core is assembled to the substrate.
μｍの厚さにプリントコイルパターンを形成し、 前記コイルパターンを有する複数枚の絶縁基材を、対向
するコイルパターンの合計の厚さより大きい厚さの第３
の磁性コアを、コイルパターンの中央部に介在させて積
層し、 該積層体の表裏面に、コイルパターンの厚さとほぼ同じ
厚さまたはやや薄い第１の磁性コアをコイルパターンの
中央部に配置し、さらに積層体の表裏面を絶縁材により
覆って基板を構成し、 前記第１、第３の磁性コアと共に磁路を構成する第２の
磁性コアを前記基板に組み付けたことを特徴とするコイ
ル部品。3. The method according to claim 1, wherein the front and back surfaces of the plurality of insulating substrates have a thickness of 80 to 300.
forming a printed coil pattern having a thickness of μm, and forming a plurality of insulating base materials having the coil pattern on a third sheet having a thickness larger than the total thickness of the opposing coil patterns.
The first magnetic core having substantially the same thickness as or slightly thinner than the thickness of the coil pattern is disposed at the center of the coil pattern on the front and back surfaces of the laminated body. Further, a substrate is formed by covering the front and back surfaces of the laminate with an insulating material, and a second magnetic core forming a magnetic path together with the first and third magnetic cores is assembled to the substrate. Coil parts.
を封入したことを特徴とするコイル部品。4. The coil component according to claim 3, wherein an insulating resin for insulating between the opposed coil patterns is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000183212A JP2002008922A (en) | 2000-06-19 | 2000-06-19 | Coil part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000183212A JP2002008922A (en) | 2000-06-19 | 2000-06-19 | Coil part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002008922A true JP2002008922A (en) | 2002-01-11 |
Family
ID=18683830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000183212A Withdrawn JP2002008922A (en) | 2000-06-19 | 2000-06-19 | Coil part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002008922A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7330676B2 (en) | 2002-10-28 | 2008-02-12 | Oce Printing Systems Gmbh | Graphical user surface and method for indicating a malfunction state of an electrophotographic printing or copying system |
| JP2010045127A (en) * | 2008-08-11 | 2010-02-25 | Tdk Corp | Coil, transformation element and switching power supply device |
| WO2010064505A1 (en) * | 2008-12-03 | 2010-06-10 | 株式会社村田製作所 | Electronic component |
| WO2015029976A1 (en) * | 2013-09-02 | 2015-03-05 | 株式会社村田製作所 | Electronic component, and common mode choke coil |
-
2000
- 2000-06-19 JP JP2000183212A patent/JP2002008922A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7330676B2 (en) | 2002-10-28 | 2008-02-12 | Oce Printing Systems Gmbh | Graphical user surface and method for indicating a malfunction state of an electrophotographic printing or copying system |
| JP2010045127A (en) * | 2008-08-11 | 2010-02-25 | Tdk Corp | Coil, transformation element and switching power supply device |
| WO2010064505A1 (en) * | 2008-12-03 | 2010-06-10 | 株式会社村田製作所 | Electronic component |
| JP5327231B2 (en) * | 2008-12-03 | 2013-10-30 | 株式会社村田製作所 | Electronic components |
| WO2015029976A1 (en) * | 2013-09-02 | 2015-03-05 | 株式会社村田製作所 | Electronic component, and common mode choke coil |
| CN105518811A (en) * | 2013-09-02 | 2016-04-20 | 株式会社村田制作所 | Electronic component, and common mode choke coil |
| JPWO2015029976A1 (en) * | 2013-09-02 | 2017-03-02 | 株式会社村田製作所 | Electronic components and common mode choke coils |
| US9865388B2 (en) | 2013-09-02 | 2018-01-09 | Murata Manufacturing Co., Ltd. | Electronic component and common mode choke coil |
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