JPH0888125A - Laminated electronic part - Google Patents
Laminated electronic partInfo
- Publication number
- JPH0888125A JPH0888125A JP6222189A JP22218994A JPH0888125A JP H0888125 A JPH0888125 A JP H0888125A JP 6222189 A JP6222189 A JP 6222189A JP 22218994 A JP22218994 A JP 22218994A JP H0888125 A JPH0888125 A JP H0888125A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- permeability material
- magnetic
- laminated
- low
- 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- Withdrawn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]
【産業上の利用分野】本発明は、トランス部を有する積
層型電子部品、例えば積層トランス、或いは、積層トラ
ンスと積層インダクタをと組み込んだＬＣ複合積層型電
子部品に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated electronic component having a transformer, for example, a laminated transformer or an LC composite laminated electronic component incorporating a laminated transformer and a laminated inductor.
【０００２】[0002]
【従来の技術】従来、この種の積層型電子部品、例えば
積層トランスとして図３３及び図３４に示されたものが
知られている。2. Description of the Related Art Conventionally, a laminated electronic component of this type, for example, a laminated transformer shown in FIGS. 33 and 34 is known.
【０００３】この積層トランスは、図３３に示すように
ＮｉーＺｎ系フェライト等で調製された高透磁率材で形
成されたグリーンシート１を多数枚積層してなるもの
で、この積層されるグリーンシート１中、上方及び下方
に位置するグリーンシート１ａにはコイル導体が印刷さ
れていないダミーシートを積層し、他方、この上下のダ
ミーシート間のグリーンシート１ｂにはスルーホールで
螺旋状に接続されるコイル導体が印刷されている。As shown in FIG. 33, this laminated transformer is formed by laminating a large number of green sheets 1 made of a high magnetic permeability material prepared from Ni-Zn ferrite or the like. In the sheet 1, the green sheets 1a located above and below are laminated with dummy sheets on which coil conductors are not printed, and on the other hand, the green sheets 1b between the upper and lower dummy sheets are spirally connected by through holes. The coil conductor is printed.
【０００４】このように構成されたグリーンシート１を
上下に圧着し、得られた磁性体層を焼成し、更にこの積
層体に外部電極を印刷することにより積層トランスが形
成される。The green sheet 1 thus constructed is pressure-bonded to the upper and lower sides, the obtained magnetic layer is fired, and the external electrodes are printed on the laminated body to form a laminated transformer.
【０００５】図３４はこの方法により製造された積層ト
ランス２の断面を示している。この積層トランス２はコ
イル導体３ａにより螺旋状に接続された１次コイル３
と、また、この１次コイル３の外側でコイル導体４ａに
より同じく螺旋状に接続された２次コイル４とを有し、
これらのコイル３，４を引き出し電極３ｂ，３ｃ，４
ｂ，４ｃにより図示しない外部電極に接続している。こ
れにより、各引き出し電極３ｂ，３ｃ，４ｂ，４ｃを通
じて各コイル３，４に通電され、左右に磁束φ１の流れ
が形成される。FIG. 34 shows a cross section of the laminated transformer 2 manufactured by this method. This laminated transformer 2 has a primary coil 3 spirally connected by a coil conductor 3a.
And a secondary coil 4 which is also spirally connected to the outside of the primary coil 3 by a coil conductor 4a.
These coils 3 and 4 are connected to the extraction electrodes 3b, 3c and 4
It is connected to an external electrode (not shown) by b and 4c. As a result, each coil 3, 4 is energized through each extraction electrode 3b, 3c, 4b, 4c, and a flow of the magnetic flux φ1 is formed on the left and right.
【０００６】[0006]
【発明が解決しようとする課題】ところで、前記従来の
積層型電子部品、即ち積層トランス２では前述の如く高
いインダクタンスを得るため、積層トランス２を高透磁
率材で構成している。By the way, in the above-mentioned conventional multilayer electronic component, that is, the multilayer transformer 2, the multilayer transformer 2 is made of a high magnetic permeability material in order to obtain a high inductance as described above.
【０００７】しかしながら、積層トランス２の磁性体層
全体を高透磁率材で構成しているため、磁束φ１はもと
より、各コイル３，４中、隣接するコイル導体３ａ，４
ｂ相互間でも磁束φ２が流れ、更にはコイル導体３ａ或
いはコイル導体４ｂ自体でも磁束φ３が流れ、１次コイ
ル３と２次コイル４とを貫く磁束φ１が少なくなり、結
合係数が小さくなるという問題点を有していた。However, since the entire magnetic layer of the laminated transformer 2 is made of a high magnetic permeability material, not only the magnetic flux φ1 but also the adjacent coil conductors 3a and 4 in each coil 3 and 4 are provided.
The magnetic flux φ2 also flows between b, and the magnetic flux φ3 also flows in the coil conductor 3a or the coil conductor 4b itself, so that the magnetic flux φ1 penetrating the primary coil 3 and the secondary coil 4 decreases, and the coupling coefficient decreases. Had a point.
【０００８】本発明の目的は前記従来の課題に鑑み、磁
気の結合係数を向上させることができる積層型電子部品
を提供することにある。In view of the above-mentioned conventional problems, an object of the present invention is to provide a laminated electronic component capable of improving the magnetic coupling coefficient.
【０００９】[0009]
【課題を解決するための手段】本発明は前記課題を解決
するため、請求項１の発明は、高透磁率材で形成された
磁性体層内部に螺旋状の１次コイルと２次コイルとを埋
設してなる積層型電子部品において、前記磁性体層内部
の内寄りには前記１次コイル又は２次コイルの一方のコ
イルを配置し、その外寄りには一方のコイルと間隔をお
いて他方コイルを対向配置し、該１次コイルと２次コイ
ルとの間には空洞或いは低透磁率材層を介在したことを
特徴とする。In order to solve the above-mentioned problems, the present invention according to claim 1 provides a spiral primary coil and a secondary coil inside a magnetic layer formed of a high magnetic permeability material. In the multilayer electronic component in which the magnetic field layer is embedded, one of the primary coil and the secondary coil is arranged inside the magnetic layer, and one coil is arranged outside the coil. On the other hand, the coils are arranged opposite to each other, and a cavity or a low magnetic permeability material layer is interposed between the primary coil and the secondary coil.
【００１０】請求項２の発明は、高透磁率材で形成され
た磁性体層内部に螺旋状の１次コイルと２次コイルとを
埋設してなる積層型電子部品において、前記１次コイル
と前記２次コイルとを上下に対向配置するとともに、該
各コイルをそれぞれ間隔をおいて配置された内側コイル
導体と外側コイル導体とにより構成し、該内側コイル導
体と外側コイル導体との間には空洞或いは低透磁率材層
を介在したことを特徴とする。According to a second aspect of the present invention, there is provided a laminated electronic component in which a spiral primary coil and a secondary coil are embedded inside a magnetic layer formed of a high magnetic permeability material. The secondary coil is arranged to face each other vertically, and each coil is composed of an inner coil conductor and an outer coil conductor which are arranged with a space therebetween, and between the inner coil conductor and the outer coil conductor. It is characterized in that a cavity or a low magnetic permeability material layer is interposed.
【００１１】請求項３の発明は、高透磁率材で形成され
た磁性体層内部に螺旋状の１次コイルと２次コイルとを
埋設してなる積層型電子部品において、前記１次コイル
と前記２次コイルとを上下に対向配置するとともに、該
１次コイルの内側から該２次コイルの内側に亘って空洞
或いは低透磁率材層を配置したことを特徴とする。According to a third aspect of the present invention, there is provided a laminated electronic component in which a spiral primary coil and a secondary coil are embedded inside a magnetic layer formed of a high magnetic permeability material, wherein The secondary coil and the secondary coil are vertically opposed to each other, and a cavity or a low-permeability material layer is arranged from the inside of the primary coil to the inside of the secondary coil.
【００１２】請求項４の発明は、高透磁率材で形成され
た磁性体層内部に螺旋状の１次コイルと２次コイルとを
埋設してなる積層型電子部品において、前記１次コイル
と前記２次コイルを左右に配置してなり、該各コイルの
外側には空洞或いは低透磁率材層を配置したことを特徴
とする。According to a fourth aspect of the present invention, there is provided a laminated electronic component in which a spiral primary coil and a secondary coil are embedded in a magnetic material layer formed of a high magnetic permeability material. The secondary coils are arranged on the left and right sides, and a cavity or a low magnetic permeability material layer is arranged outside each coil.
【００１３】[0013]
【作用】請求項１の発明によれば、磁性体層内部の内寄
りには１次コイル又は２次コイルの一方のコイルを配置
し、その外寄りには一方のコイルと間隔をおいて他方コ
イルを対向配置しているから、一方のコイルの内側から
他方のコイルの外側に亘って磁束が流れる。また、この
各コイル間には空洞或いは低透磁率材層を介在している
から、左右に隣接するコイル導体同士で流れる磁束がこ
の空洞等で遮断される。また、この空洞等が各コイルに
近接しているときは、コイル導体自体で形成される小ル
ープの磁束の流れが遮断される。According to the first aspect of the present invention, one of the primary coil and the secondary coil is arranged inside the magnetic layer, and the other coil is arranged outside the magnetic layer with a distance from one coil. Since the coils are arranged to face each other, the magnetic flux flows from the inside of one coil to the outside of the other coil. Further, since a cavity or a low-permeability material layer is interposed between the coils, magnetic flux flowing between the coil conductors adjacent to each other on the left and right is blocked by the cavity or the like. Further, when the cavity or the like is close to each coil, the flow of the magnetic flux of the small loop formed by the coil conductor itself is blocked.
【００１４】請求項２の発明によれば、１次コイルと２
次コイルとを上下に対向配置するとともに、各コイルを
それぞれ間隔をおいて配置された内側コイル導体と外側
コイル導体とにより構成しており、各コイルの内側コイ
ル導体と外側コイル導体との間で上下に亘って磁束が流
れる。また、一次コイル及び２次コイルで内側コイル導
体と外側コイル導体との間に空洞或いは低透磁率材層を
介在しているため、左右隣接する内外コイル導体同士で
磁束が流れることがない。また、この空洞等が各コイル
に近接しているときは、請求項１の発明と同様に各コイ
ル導体自体で形成される小ループの磁束の流れが遮断さ
れる。According to the second aspect of the present invention, the primary coil and the second coil are provided.
The next coil is arranged vertically opposite to each other, and each coil is composed of an inner coil conductor and an outer coil conductor which are arranged at intervals, respectively, and between the inner coil conductor and the outer coil conductor of each coil. Magnetic flux flows up and down. Moreover, since a cavity or a low-permeability material layer is interposed between the inner coil conductor and the outer coil conductor in the primary coil and the secondary coil, magnetic flux does not flow between the left and right adjacent inner and outer coil conductors. Further, when this cavity or the like is close to each coil, the flow of the magnetic flux of the small loop formed by each coil conductor itself is blocked as in the first aspect of the invention.
【００１５】請求項３の発明によれば、１次コイルと２
次コイルとを上下に対向配置しており、、上下の各コイ
ルの内側から外側に亘って磁束の流れが形成される。ま
た、１次コイルの内側から２次コイルの内側に亘って空
洞或いは低透磁率材層を配置したから、この空洞等が各
コイルに近接しているときは、請求項１の発明と同様
に、各コイル導体自体で形成される小ループの磁束の流
れが遮断される。According to the invention of claim 3, the primary coil and the secondary coil
The next coil is vertically opposed to each other, and a magnetic flux flow is formed from the inside to the outside of each of the upper and lower coils. Further, since the cavity or the low-permeability material layer is arranged from the inside of the primary coil to the inside of the secondary coil, when the cavity or the like is close to each coil, the same as in the invention of claim 1. , The flow of magnetic flux in a small loop formed by each coil conductor itself is blocked.
【００１６】請求項４の発明によれば、１次コイルと２
次コイルを間隔をおいて左右に配置しており、１次コイ
ルの内側から左右に隣接する２次コイルの内側に亘って
磁束の流れが形成される。また、各コイルの外側には空
洞或いは低透磁率材層を配置しているため、各コイルの
コイル導体同士で流れる磁束が遮断される。また、請求
項１の発明と同様に各コイル導体自体で形成される小ル
ープの磁束の流れが遮断される。According to the invention of claim 4, the primary coil and the second coil
The secondary coils are arranged on the left and right with an interval, and a flow of magnetic flux is formed from the inside of the primary coil to the inside of the secondary coils adjacent to each other on the left and right. Further, since the cavity or the low magnetic permeability material layer is arranged outside each coil, the magnetic flux flowing between the coil conductors of each coil is blocked. Further, as in the case of the first aspect of the invention, the flow of the magnetic flux of the small loop formed by each coil conductor itself is blocked.
【００１７】[0017]
【実施例】図１乃至図７は本発明に係る積層型電子部品
の第１実施例を示すもので、この積層型電子部品として
積層トランスを例として掲げ説明する。ここで、図１は
積層トランスの断面図、図２は積層トランスのコイル導
体及び低透磁率材層の積層領域を示す平面図、図３乃至
図７は積層トランスの製造工程図である。1 to 7 show a first embodiment of a laminated electronic component according to the present invention. A laminated transformer will be described as an example of the laminated electronic component. Here, FIG. 1 is a cross-sectional view of the laminated transformer, FIG. 2 is a plan view showing a laminated region of a coil conductor and a low magnetic permeability material layer of the laminated transformer, and FIGS. 3 to 7 are manufacturing process diagrams of the laminated transformer.
【００１８】この積層トランス１０の磁性体層１１は既
に説明した従来例と同様に高透磁率材で形成されたもの
で、その内部に螺旋状に印刷されたコイル導体１２ａ，
１３ａで１次コイル１２及び２次コイル１３が形成され
ている。また、この１次コイル１２はその磁性体層１１
の内側中央に、２次コイル１３は１次コイル１２の外側
に対向するようそれぞれ配置されており、その引き出し
電極１２ｂ，１２ｃ，１３ｂ，１３ｃを通じて図示しな
い外部端子電極に接続している。これにより、各引き出
し電極１２ｂ，１２ｃ，１３ｂ，１３ｃを通じて流れる
電流により磁性体層１１内に図１の破線矢印に示すよう
な磁束φが形成される。The magnetic layer 11 of the laminated transformer 10 is made of a high magnetic permeability material as in the conventional example described above, and has a coil conductor 12a, which is spirally printed, inside thereof.
The primary coil 12 and the secondary coil 13 are formed by 13a. Further, the primary coil 12 has the magnetic layer 11
In the center of the inside of the secondary coil 13, the secondary coil 13 is arranged so as to face the outside of the primary coil 12, and is connected to an external terminal electrode (not shown) through the extraction electrodes 12b, 12c, 13b, 13c. As a result, the magnetic flux φ as shown by the broken line arrow in FIG. 1 is formed in the magnetic layer 11 by the current flowing through each of the extraction electrodes 12b, 12c, 13b, 13c.
【００１９】このような構成は前記従来例も同様であ
り、本発明の第１実施例はこの磁性体層１１内の所定位
置に低透磁率材層１４を配置したことにある。Such a structure is the same as in the prior art example, and the first embodiment of the present invention resides in that the low magnetic permeability material layer 14 is arranged at a predetermined position in the magnetic layer 11.
【００２０】即ち、この１次コイル１２のコイル導体１
２ａの外側と２次コイル１３の内側のコイル導体１３ａ
との間にＮｉーＺｎ系フェライト等で低透磁率に調製さ
れた低透磁率材層１４を配置している。That is, the coil conductor 1 of the primary coil 12
Coil conductor 13a outside 2a and inside secondary coil 13
And a low-permeability material layer 14 prepared with a low magnetic permeability by Ni-Zn ferrite or the like.
【００２１】これにより、コイル導体１２ａとコイル導
体１３ａとの間が低透磁率材層１４で遮断され、従来の
如く隣接する各コイル導体１２ａ，１３ａ間で磁束が流
れることがないし、また、各コイル導体１２ａ，１３ａ
自体に形成される磁束もこの低透磁率材層１４で遮断さ
れ、従来の如く小ループの磁束が形成されることがな
い。ここで、本実施例に係る積層トランス１０と従来の
積層トランスの結合係数を計測したところ、本実施例の
積層トランス１０が０．９５で、従来の積層トランスが
０．６０であり、結合係数が向上していることが明らか
となった。As a result, the coil conductor 12a and the coil conductor 13a are shielded from each other by the low-permeability material layer 14, so that magnetic flux does not flow between the adjacent coil conductors 12a and 13a as in the conventional case, and each coil conductor 12a and 13a does not flow. Coil conductors 12a, 13a
The magnetic flux formed in itself is also blocked by the low magnetic permeability material layer 14, and a small loop magnetic flux is not formed unlike the conventional case. Here, the coupling coefficient between the laminated transformer 10 according to the present embodiment and the conventional laminated transformer was measured. As a result, the laminated transformer 10 according to the present embodiment was 0.95, and the conventional laminated transformer was 0.60. It has become clear that
【００２２】このような積層トランス１０を製作すると
きは、まず、図３に示すように、引き出し電極１２ｃが
印刷された下部ダミー磁性体層１１ａの上面に、コイル
導体１２ａ，１３ａ及び引き出し電極１３ｂ，１３ｃが
印刷されたコイル磁性体層１１ｂを順次積層圧着する。
この積層圧着工程で、各コイル導体１２ａ，１３ａ及び
引き出し電極１２ｃ，１３ｂ，１３ｃが図示しないスル
ーホールで螺旋状に接続される。When manufacturing such a laminated transformer 10, first, as shown in FIG. 3, coil conductors 12a and 13a and an extraction electrode 13b are formed on the upper surface of the lower dummy magnetic layer 11a on which the extraction electrode 12c is printed. , 13c are printed, and the coil magnetic material layers 11b are sequentially laminated and pressure-bonded.
In this lamination pressure-bonding step, the coil conductors 12a, 13a and the lead electrodes 12c, 13b, 13c are spirally connected to each other through through holes (not shown).
【００２３】この工程の後に、図４に示すように１次コ
イル１２と２次コイル１３との間に低透磁率材充填用の
溝１５をドリル１６にて形成する。ここで、この溝１５
は、図２及び図５に示すように、各コイル１２，１３間
に環状に形成する。After this step, as shown in FIG. 4, a groove 16 for filling the low-permeability material is formed between the primary coil 12 and the secondary coil 13 by a drill 16. Here, this groove 15
Is formed in an annular shape between the coils 12 and 13 as shown in FIGS.
【００２４】その後に、図６に示すように低透磁率材を
この溝１５に充填し、コイル磁性体層１１ｂ内に低透磁
率材層１４を形成する。そして、この低透磁率材層１４
が形成されたコイル磁性体層１１ｂの上面に、図７に示
すように、引き出し電極１２ｂが印刷された上部ダミー
磁性体層１１ｃを積層圧着する。しかる後に焼成し、更
に外部電極を印刷して積層トランス１０を形成する。After that, as shown in FIG. 6, a low magnetic permeability material is filled in the groove 15 to form the low magnetic permeability material layer 14 in the coil magnetic material layer 11b. Then, this low magnetic permeability material layer 14
As shown in FIG. 7, an upper dummy magnetic layer 11c on which the extraction electrode 12b is printed is laminated and pressure-bonded on the upper surface of the coil magnetic layer 11b on which is formed. After that, firing is performed, and then external electrodes are printed to form the laminated transformer 10.
【００２５】図８及び図９は本発明に係る積層トランス
の第２実施例を示すもので、図８は積層トランスの断面
図である。前記第１実施例では溝１５に低透磁率材を充
填してコイル磁性体層１１ｂ内に低透磁率材層１４を形
成したが、この実施例では溝１５に低透磁率材を充填す
ることなく、空洞１７を形成している。8 and 9 show a second embodiment of the laminated transformer according to the present invention, and FIG. 8 is a sectional view of the laminated transformer. In the first embodiment, the groove 15 is filled with a low-permeability material to form the low-permeability material layer 14 in the coil magnetic layer 11b. In this embodiment, the groove 15 is filled with a low-permeability material. Instead, the cavity 17 is formed.
【００２６】このように空洞１７を形成することによ
り、小ループの磁束の流れを遮断している。なお、この
ような空洞１７を製作するときは、図９に示すように、
磁性体層１１に溝１５を形成した後に、引き出し電極１
２ｂが印刷された上部ダミー磁性体層１１ｃをそのまま
積層圧着すればよい。この空洞１７を有する積層トラン
ス１０の結合係数を計測したところ、第１実施例と同様
に０．９５であった。By forming the cavity 17 in this way, the flow of magnetic flux in the small loop is blocked. When manufacturing such a cavity 17, as shown in FIG.
After forming the groove 15 in the magnetic layer 11, the extraction electrode 1
The upper dummy magnetic layer 11c on which 2b is printed may be laminated and pressure bonded as it is. When the coupling coefficient of the laminated transformer 10 having the cavity 17 was measured, it was 0.95 as in the first embodiment.
【００２７】図１０乃至図２１は本発明に係る積層トラ
ンスの第３実施例を示すもので、図１０は積層トランス
の断面図、図１１は積層トランスのコイル導体及び低透
磁率材層の積層領域を示す平面図、図１３乃至図２１は
積層トランスの製造工程を示す断面図である。10 to 21 show a third embodiment of the laminated transformer according to the present invention. FIG. 10 is a sectional view of the laminated transformer, and FIG. 11 is a laminated structure of a coil conductor and a low magnetic permeability material layer of the laminated transformer. 13 is a plan view showing a region, and FIGS. 13 to 21 are sectional views showing a manufacturing process of the laminated transformer.
【００２８】この積層トランス２０は、磁性体層２１内
部でその上部側には１次コイル２２を配置し、下部側に
はこの１次コイル２２と対向するよう２次コイル２３が
配置されている。また、この各コイル２２，２３はそれ
ぞれ内側コイル導体２２ａ，２３ａと外側コイル導体２
２ｂ，２３ｂとを接続電極２２ｃ，２３ｃを介して接続
したもので、引き出し電極２２ｄ，２２ｅ，２３ｄ，２
３ｅを通じて図示しない外部電極に接続している。In this laminated transformer 20, a primary coil 22 is arranged inside the magnetic layer 21 on the upper side, and a secondary coil 23 is arranged on the lower side so as to face the primary coil 22. . Further, the coils 22 and 23 are respectively provided with the inner coil conductors 22a and 23a and the outer coil conductor 2.
2b and 23b are connected via connection electrodes 22c and 23c, and extraction electrodes 22d, 22e, 23d and 2
It is connected to an external electrode (not shown) through 3e.
【００２９】このような磁性体層２１内で、１次コイル
２２の内側コイル導体２２ａと外側コイル導体２２ｂと
の間には、図１１にも示すように環状の低透磁率材層２
４ａを配置している。また、２次コイル２３の内側コイ
ル導体２３ａと外側コイル導体２３ｂとの間には、図１
１にも示すように環状の低透磁率材層２４ｂを配置して
いる。更に、この１次コイル２２の内側コイル導体２２
ａと、２次コイル２３の内側コイル導体２３ａとの間に
は、図１１にも示すように環状の低透磁率材層２４ｃを
配置している。In such a magnetic layer 21, between the inner coil conductor 22a and the outer coil conductor 22b of the primary coil 22, an annular low magnetic permeability material layer 2 is formed as shown in FIG.
4a is arranged. Further, between the inner coil conductor 23a and the outer coil conductor 23b of the secondary coil 23, as shown in FIG.
As shown in FIG. 1, an annular low magnetic permeability material layer 24b is arranged. Further, the inner coil conductor 22 of the primary coil 22
As shown in FIG. 11, an annular low-permeability material layer 24c is arranged between a and the inner coil conductor 23a of the secondary coil 23.
【００３０】本実施例によれば、各コイル２２，２３に
引き出し電極２２ｄ，２２ｅ，２３ｄ，２３ｅを通じて
電流を流すことにより、図１０の破線矢印に示すよう
に、１次コイル２２及び２次コイル２３の内側から外側
に亘って磁束φが流れる。また、各コイル２２，２３の
内外コイル導体２２ａ，２２ｂ，２３ａ，２３ｂ間に各
低透磁率材層２４ａ，２４ｂを介在しているため、内外
コイル導体２２ａ，２２ｂ，２３ａ，２３ｂ間で形成さ
れる磁束の流れが各低透磁率材層２４ａ，２４ｂで遮断
される。更に、上方の１次コイル２２と下方の２次コイ
ル２３との間で内側コイル導体２２ａ，２３ａに対応す
る部位に低透磁率材層２４ｃが配置されているため、１
次及び２次コイル２２，２３を貫通する磁束φが外へ漏
れることがない。According to the present embodiment, by supplying a current to the coils 22 and 23 through the extraction electrodes 22d, 22e, 23d and 23e, the primary coil 22 and the secondary coil 22 as shown by the broken line arrows in FIG. The magnetic flux φ flows from the inside to the outside of 23. Further, since the low magnetic permeability material layers 24a, 24b are interposed between the inner and outer coil conductors 22a, 22b, 23a, 23b of the respective coils 22, 23, they are formed between the inner and outer coil conductors 22a, 22b, 23a, 23b. The flow of magnetic flux is blocked by the low magnetic permeability material layers 24a and 24b. Further, since the low-permeability material layer 24c is disposed between the upper primary coil 22 and the lower secondary coil 23 at the portions corresponding to the inner coil conductors 22a and 23a, 1
The magnetic flux φ penetrating the secondary and secondary coils 22 and 23 does not leak outside.
【００３１】このような積層トランス２０を製作すると
きは、まず、図１２に示すように、２次コイル２３の引
き出し電極２３ｄ，２３ｅを印刷した下部ダミー磁性体
層２１ａと、２次コイル２３を印刷した２次コイル磁性
体層２１ｂとを順次積層圧着し、図示しないスルーホー
ルで接続して螺旋状にコイルを形成する。When manufacturing such a laminated transformer 20, first, as shown in FIG. 12, the lower dummy magnetic layer 21a on which the extraction electrodes 23d and 23e of the secondary coil 23 are printed and the secondary coil 23 are formed. The printed secondary coil magnetic material layer 21b is sequentially laminated and pressure-bonded, and connected by a through hole (not shown) to form a spiral coil.
【００３２】次いで、図１３に示すように、２次コイル
２３の内側コイル導体２３ａと外側コイル導体２３ｂと
の間に低透磁率材用の溝２５ａを前記第１実施例と同様
にドリル１６にて環状に形成する。その後に、図１４に
示すように、低透磁率材をこの溝２５ａに充填し、磁性
体層２１内に低透磁率材層２４ｂを形成する。Then, as shown in FIG. 13, a groove 25a for a low magnetic permeability material is formed in the drill 16 between the inner coil conductor 23a and the outer coil conductor 23b of the secondary coil 23 as in the first embodiment. To form a ring. After that, as shown in FIG. 14, a low magnetic permeability material is filled in the groove 25a to form a low magnetic permeability material layer 24b in the magnetic layer 21.
【００３３】この低透磁率材層２４ｂを形成した後、こ
の低透磁率材層２４ｂを配置した１次コイル磁性体層２
１ｂの上面に、図１５に示すように、２次コイル２３の
接続電極２３ｃを印刷した中央ダミー磁性体層２１ｃを
積層圧着する。その後、図１６に示すように、中央ダミ
ー磁性体層２１ｃにドリル１６で環状に低透磁率材用の
溝２５ｂを形成する。ここで、この溝２５ｂは図１０に
示すように、１次コイル２２の内側コイル導体２２ａと
２次コイル２３の内側コイル２３ａの間に対向して位置
している。After forming the low magnetic permeability material layer 24b, the primary coil magnetic material layer 2 in which the low magnetic permeability material layer 24b is arranged.
As shown in FIG. 15, the central dummy magnetic material layer 21c on which the connection electrode 23c of the secondary coil 23 is printed is laminated and pressure-bonded on the upper surface of the 1b. After that, as shown in FIG. 16, a groove 25b for a low magnetic permeability material is formed in a ring shape by a drill 16 in the central dummy magnetic layer 21c. Here, as shown in FIG. 10, the groove 25b is located between the inner coil conductor 22a of the primary coil 22 and the inner coil 23a of the secondary coil 23 so as to face each other.
【００３４】この溝２５ｂには、図１７に示すように、
低透磁率材が充填され、環状の低透磁率材層２４ｃを形
成する。その後、図１８に示すように、１次コイル２２
が形成された１次コイル磁性体層２１ｄを中央ダミー磁
性体層２１ｃの上面に積層する。この積層の後に図１９
に示すように、１次コイル２２の内外コイル導体２２
ａ，２２ｂの間にドリル１６で低透磁率材用の溝２５ｃ
を環状に形成し、この溝２５ｃに、図２０に示すよう
に、低透磁率材を充填して環状の低透磁率材層２４ａを
形成する。In this groove 25b, as shown in FIG.
The low magnetic permeability material is filled to form an annular low magnetic permeability material layer 24c. Then, as shown in FIG. 18, the primary coil 22
The primary coil magnetic material layer 21d having the above is formed on the upper surface of the central dummy magnetic material layer 21c. After this stacking, FIG.
As shown in FIG.
A groove 25c for a low-permeability material with a drill 16 between a and 22b
20, the groove 25c is filled with a low-permeability material to form an annular low-permeability material layer 24a as shown in FIG.
【００３５】その後、図２１に示すように、引き出し電
極２２ｅが印刷された上部ダミー磁性体層２１ｅを１次
コイル磁性体層２１ｄの上面に積層し、その後、これを
焼成し外部電極を印刷することにより、第３実施例に係
る積層トランス２０が形成される。After that, as shown in FIG. 21, an upper dummy magnetic layer 21e on which the extraction electrode 22e is printed is laminated on the upper surface of the primary coil magnetic layer 21d, and then this is fired to print external electrodes. As a result, the laminated transformer 20 according to the third embodiment is formed.
【００３６】図２２及び図２３は本発明に係る積層トラ
ンスの第４実施例を示すもので、図２２は積層トランス
の断面図、図２３は積層トランスのコイル導体及び低透
磁率材層の積層領域を示す平面図である。22 and 23 show a fourth embodiment of the laminated transformer according to the present invention. FIG. 22 is a sectional view of the laminated transformer, and FIG. 23 is a laminated structure of a coil conductor and a low magnetic permeability material layer of the laminated transformer. It is a top view showing a field.
【００３７】この第３実施例に係る積層トランス３０は
その磁性体層３１内部に、中央から上部に１次コイル３
２を、中央から下部に２次コイル３３をそれぞれ配置
し、各コイル３２，３３の内側近傍に上下に貫通する環
状の低透磁率材層３４を形成している。The laminated transformer 30 according to the third embodiment has the primary coil 3 inside the magnetic layer 31 from the center to the top.
2, a secondary coil 33 is arranged from the center to the lower part, and an annular low magnetic permeability material layer 34 that penetrates vertically is formed near the inside of each coil 32, 33.
【００３８】この実施例によれば、前記第１実施例と同
様に、各コイル３２，３３のコイル導体自体に形成され
る磁束が、この低透磁率材層３４により遮断される。According to this embodiment, like the first embodiment, the magnetic flux formed in the coil conductors of the coils 32 and 33 is blocked by the low magnetic permeability material layer 34.
【００３９】図２４乃至図３２は本発明に係る積層トラ
ンスの第５実施例を示すもので、図２４は積層トランス
の断面図、図２５は積層トランスのコイル導体及び低透
磁率材層の積層領域を示す平面図、図２６乃至図３２は
積層トランスの製造工程を示す断面図である。24 to 32 show a fifth embodiment of the laminated transformer according to the present invention. FIG. 24 is a sectional view of the laminated transformer, and FIG. 25 is a laminated structure of a coil conductor and a low magnetic permeability material layer of the laminated transformer. 26 is a plan view showing a region, and FIGS. 26 to 32 are sectional views showing a manufacturing process of the laminated transformer.
【００４０】本実施例に係る積層トランス４０はその磁
性体層４１内の左側に多巻数の１次コイル４２を、右側
に少巻数の２次コイル４３をそれぞれ配置したもので、
１次コイル４２と２次コイル４３との間には低透磁率材
層４４ａを配置している。この低透磁率材層４４ａと左
側に対向する１次コイル４２の外側には低透磁率材層４
４ｂを配置し、また、低透磁率材層４４ａと右側に対向
する２次コイル４３の外側には低透磁率材層４４ｃを配
置している。更に、図２５に示すように、各コイル４
２，４３の外側で前後方向に対向する部位には同じく各
コイル４２，４３の外側を囲うよう低透磁率材層４４
ｄ，４４ｅ，４４ｆ，４４ｇを配置している。このよう
に各低透磁率材層４４ａ〜４４ｇで囲われた各コイル導
体４２ａ，４３ａは、各引き出し電極４２ｂ，４２ｃ，
４３ｂ，４３ｂを通じて通電され、磁性体層４１内に破
線φで示す磁束が流れる。The multi-layer transformer 40 according to this embodiment has a multi-turn primary coil 42 on the left side and a low-turn secondary coil 43 on the right side of the magnetic layer 41.
A low-permeability material layer 44 a is arranged between the primary coil 42 and the secondary coil 43. The low-permeability material layer 4a is provided outside the primary coil 42 facing the low-permeability material layer 44a on the left side.
4b is arranged, and the low magnetic permeability material layer 44c is arranged outside the secondary coil 43 facing the low magnetic permeability material layer 44a on the right side. Further, as shown in FIG.
The low magnetic permeability material layer 44 is formed on the outer sides of the coils 2, 43 to surround the outer sides of the coils 42, 43.
d, 44e, 44f and 44g are arranged. The coil conductors 42a and 43a surrounded by the low-permeability material layers 44a to 44g in this manner are the extraction electrodes 42b and 42c,
Electric current is supplied through 43b and 43b, and a magnetic flux indicated by a broken line φ flows in the magnetic layer 41.
【００４１】この実施例によれば、コイル導体４２ａ
と、これと左右に対向するコイル導体４３ａとの間が低
透磁率材層４４ａで遮断されるし、また、各コイル導体
４２ａ，４３ａ自体に形成される磁束も各低透磁率材層
４４ａ〜４４ｇで遮断され、従来の如く小ループの磁束
が形成されることがない。According to this embodiment, the coil conductor 42a
And the coil conductors 43a facing each other on the left and right are cut off by the low-permeability material layer 44a, and the magnetic fluxes formed on the coil conductors 42a and 43a themselves are also reduced by the low-permeability material layer 44a. Since it is cut off at 44 g, a small loop magnetic flux is not formed unlike the conventional case.
【００４２】この第５実施例に係る積層トランス４０は
次の方法で製造する。まず、図２６に示すように、引き
出し電極４２ｃ，４３ｃ及び各コイル導体４２ａ，４３
ａを印刷したシートを積層して下部磁性体層４１ａを形
成する。次いで、この下部磁性体層４１ａの２次コイル
４３の外側に低透磁率材用の溝４５ａをドリル１６で形
成する。そして、図２８に示すように、この溝４５ａに
低透磁率材を充填して低透磁率材層４４ｃを形成する。
なお、図示しないがこの２次コイル４３の前後に配置さ
れた低透磁率材層４４ｆ，４４ｇを形成するため、同様
の方法で溝を形成する一方、この溝に低透磁率材を充填
する。The laminated transformer 40 according to the fifth embodiment is manufactured by the following method. First, as shown in FIG. 26, the extraction electrodes 42c and 43c and the coil conductors 42a and 43c
Sheets printed with a are laminated to form the lower magnetic layer 41a. Next, a groove 45a for a low magnetic permeability material is formed by a drill 16 outside the secondary coil 43 of the lower magnetic layer 41a. Then, as shown in FIG. 28, the groove 45a is filled with a low magnetic permeability material to form a low magnetic permeability material layer 44c.
Although not shown, in order to form the low magnetic permeability material layers 44f and 44g arranged before and after the secondary coil 43, a groove is formed by the same method, and the low magnetic permeability material is filled in the groove.
【００４３】しかる後、図２９に示すように、この下部
磁性体層４１ａの上面にコイル導体４２ａ及び引き出し
電極４３ｂを印刷した中央磁性体層４１ｂを積層する。
その後、図３０に示すように、１次コイル４２と２次コ
イル４３との間、また、１次コイル４２の外側にそれぞ
れ低透磁率材用の溝４５ｂ，４５ｃをドリル１６で形成
する。そして、図３１に示すように、この溝４５ｂ，４
５ｃに低透磁率材を充填して低透磁率材層４４ａ，４４
ｂを形成する。なお、図示しないが、１次コイル４２の
前後に配置された低透磁率材層４４ｄ，４４ｅを形成す
るため、同様の方法で溝を形成する一方、この溝に低透
磁率材を充填する。Thereafter, as shown in FIG. 29, a central magnetic layer 41b having a coil conductor 42a and an extraction electrode 43b printed thereon is laminated on the upper surface of the lower magnetic layer 41a.
Thereafter, as shown in FIG. 30, grooves 45b and 45c for the low magnetic permeability material are formed by the drill 16 between the primary coil 42 and the secondary coil 43 and outside the primary coil 42, respectively. Then, as shown in FIG. 31, the grooves 45b, 4
5c is filled with a low magnetic permeability material to form low magnetic permeability material layers 44a, 44
b is formed. Although not shown, in order to form the low-permeability material layers 44d and 44e arranged before and after the primary coil 42, a groove is formed by the same method, and the low-permeability material is filled in the groove.
【００４４】このような各低透磁率材層４４ａ〜４４ｇ
の形成工程が終了したときは、図３２に示すように、中
央磁性体層４１ｂの上面に引き出し電極４２ｂを印刷し
た上部磁性体層４１ｃを積層する。その後、この磁性体
層４１を焼成し、更に外部電極を印刷することにより積
層トランス４０が形成される。Each such low magnetic permeability material layer 44a-44g
When the formation step of is completed, as shown in FIG. 32, the upper magnetic layer 41c having the lead electrode 42b printed thereon is laminated on the upper surface of the central magnetic layer 41b. After that, the magnetic layer 41 is fired and the external electrodes are printed to form the laminated transformer 40.
【００４５】なお、前記第３実施例乃至第５実施例に係
る積層トランスでは各低透磁率材層２４ａ〜２４ｃ，３
４，４４ａ〜４４ｇにより、漏れ磁束を遮断している
が、これを前記第２実施例に示すように、空洞状態とす
るようにしてもよい。In the laminated transformers according to the third to fifth embodiments, the low magnetic permeability material layers 24a to 24c, 3 are formed.
Although the leakage magnetic flux is blocked by 4, 44a to 44g, it may be made into a hollow state as shown in the second embodiment.
【００４６】[0046]
【発明の効果】以上説明したように、請求項１乃至請求
項４に係る積層型電子部品によれば、空洞或いは低透磁
率材層により、左右に隣接するコイル導体同士での磁束
の流れが遮断されるし、また、コイル導体自体で形成さ
れる小ループの磁束の流れが遮断されるため、磁気の結
合係数を向上させることができる。As described above, according to the laminated type electronic component according to the first to fourth aspects, the flow of the magnetic flux between the coil conductors adjacent to each other on the left and right is caused by the cavity or the low magnetic permeability material layer. Since the flow of magnetic flux in the small loop formed by the coil conductor itself is cut off, the magnetic coupling coefficient can be improved.
【図１】第１実施例に係る積層トランスの断面図FIG. 1 is a sectional view of a laminated transformer according to a first embodiment.
【図２】第１実施例に係る積層トランスのコイル導体及
び低透磁率材層の積層領域を示す平面図FIG. 2 is a plan view showing a laminated region of a coil conductor and a low magnetic permeability material layer of the laminated transformer according to the first embodiment.
【図３】第１実施例に係る積層トランスの下部ダミー磁
性体層及びコイル磁性体層の積層状態を示す断面図FIG. 3 is a cross-sectional view showing a laminated state of a lower dummy magnetic layer and a coil magnetic layer of the laminated transformer according to the first example.
【図４】第１実施例に係る積層トランスの溝形成工程を
示す断面図FIG. 4 is a sectional view showing a groove forming step of the laminated transformer according to the first embodiment.
【図５】第１実施例に係る積層トランスの溝形成工程を
示す斜視図FIG. 5 is a perspective view showing a groove forming process of the laminated transformer according to the first embodiment.
【図６】第１実施例に係る積層トランスの低透磁率材層
形成工程を示す断面図FIG. 6 is a cross-sectional view showing a low permeability material layer forming step of the laminated transformer according to the first example.
【図７】第１実施例に係る積層トランスの上部ダミー磁
性体層の積層工程を示す断面図FIG. 7 is a cross-sectional view showing a step of stacking an upper dummy magnetic layer of the multilayer transformer according to the first example.
【図８】第２実施例に係る積層トランスの断面図FIG. 8 is a sectional view of a laminated transformer according to a second embodiment.
【図９】第２実施例に係る積層トランスの上部ダミー磁
性体層の積層工程を示す断面図FIG. 9 is a sectional view showing a step of stacking an upper dummy magnetic layer of the multilayer transformer according to the second embodiment.
【図１０】第３実施例に係る積層トランスの断面図FIG. 10 is a sectional view of a laminated transformer according to a third embodiment.
【図１１】第３実施例に係る積層トランスのコイル導体
及び低透磁率材層の積層領域を示す平面図FIG. 11 is a plan view showing a laminated region of a coil conductor and a low magnetic permeability material layer of a laminated transformer according to a third embodiment.
【図１２】第３実施例に係る積層トランスの下部ダミー
磁性体層及び２次コイル磁性体層の積層状態を示す断面
図FIG. 12 is a cross-sectional view showing a laminated state of a lower dummy magnetic layer and a secondary coil magnetic layer of a laminated transformer according to a third example.
【図１３】第３実施例に係る積層トランスの溝形成工程
を示す断面図FIG. 13 is a cross-sectional view showing a groove forming step of the laminated transformer according to the third example.
【図１４】第３実施例に係る積層トランスの低透磁率材
層形成工程を示す断面図FIG. 14 is a cross-sectional view showing a low-permeability material layer forming step of the laminated transformer according to the third example.
【図１５】第３実施例に係る積層トランスの中央ダミー
磁性体層の積層工程を示す断面図FIG. 15 is a sectional view showing a step of stacking a central dummy magnetic layer of the multilayer transformer according to the third example.
【図１６】第３実施例に係る積層トランスの溝形成工程
を示す断面図FIG. 16 is a cross-sectional view showing a groove forming step of the laminated transformer according to the third example.
【図１７】第３実施例に係る積層トランスの低透磁率材
層形成工程を示す断面図FIG. 17 is a cross-sectional view showing a low-permeability material layer forming step of the laminated transformer according to the third example.
【図１８】第３実施例に係る積層トランスの１次コイル
磁性体層の積層工程を示す断面図FIG. 18 is a cross-sectional view showing a step of laminating the primary coil magnetic material layers of the laminated transformer according to the third example.
【図１９】第３実施例に係る積層トランスの溝形成工程
を示す断面図FIG. 19 is a cross-sectional view showing a groove forming step of the laminated transformer according to the third example.
【図２０】第３実施例に係る積層トランスの低透磁率材
層形成工程を示す断面図FIG. 20 is a cross-sectional view showing a low magnetic permeability material layer forming step of the laminated transformer according to the third example.
【図２１】第３実施例に係る積層トランスの上部ダミー
磁性体層の積層工程を示す断面図FIG. 21 is a cross-sectional view showing a step of laminating an upper dummy magnetic layer of the laminated transformer according to the third example.
【図２２】第４実施例に係る積層トランスの断面図FIG. 22 is a sectional view of a laminated transformer according to a fourth embodiment.
【図２３】第４実施例に係る積層トランスのコイル導体
及び低透磁率材層の積層領域を示す平面図FIG. 23 is a plan view showing a laminated region of a coil conductor and a low-permeability material layer of a laminated transformer according to a fourth example.
【図２４】第５実施例に係る積層トランスの断面図FIG. 24 is a sectional view of a laminated transformer according to a fifth embodiment.
【図２５】第５実施例に係る積層トランスのコイル導体
及び低透磁率材層の積層領域を示す平面図FIG. 25 is a plan view showing a laminated region of a coil conductor and a low magnetic permeability material layer of a laminated transformer according to a fifth example.
【図２６】第５実施例に係る積層トランスの下部磁性体
層の積層状態を示す断面図FIG. 26 is a sectional view showing a laminated state of a lower magnetic layer of the laminated transformer according to the fifth example.
【図２７】第５実施例に係る積層トランスの溝形成工程
を示す断面図FIG. 27 is a cross-sectional view showing the groove forming step of the laminated transformer according to the fifth example.
【図２８】第５実施例に係る積層トランスの低透磁率材
層形成工程を示す断面図FIG. 28 is a sectional view showing a low-permeability material layer forming step of the laminated transformer according to the fifth example.
【図２９】第５実施例に係る積層トランスの中央磁性体
層の積層工程を示す断面図FIG. 29 is a sectional view showing a step of laminating a central magnetic layer of a laminated transformer according to a fifth example.
【図３０】第５実施例に係る積層トランスの溝形成工程
を示す断面図FIG. 30 is a cross-sectional view showing the groove forming process of the laminated transformer according to the fifth example.
【図３１】第５実施例に係る積層トランスの低透磁率材
層形成工程を示す断面図FIG. 31 is a cross-sectional view showing a low magnetic permeability material layer forming step of the laminated transformer according to the fifth example.
【図３２】第５実施例に係る積層トランスの上部磁性体
層の積層工程を示す断面図FIG. 32 is a sectional view showing a step of laminating an upper magnetic layer of the laminated transformer according to the fifth example.
【図３３】従来の積層トランスの積層状態を示す斜視図FIG. 33 is a perspective view showing a laminated state of a conventional laminated transformer.
【図３４】従来の積層トランスの断面図FIG. 34 is a sectional view of a conventional laminated transformer.
１０，２０，３０，４０…積層トランス、１１，２１，
３１，４１…磁性体層、１２，２２，３２，４２…１次
コイル、１３，２３，３３，４３…２次コイル、１２
ａ，１２ｂ，１３ａ，１３ｂ…コイル導体、１４，２４
ａ〜２４ｂ，３４，４４ａ〜４４ｇ…低透磁率材層。10, 20, 30, 40 ... Multilayer transformer 11, 21, 21
31, 41 ... Magnetic layer, 12, 22, 32, 42 ... Primary coil, 13, 23, 33, 43 ... Secondary coil, 12
a, 12b, 13a, 13b ... Coil conductor, 14, 24
a to 24b, 34, 44a to 44g ... Low magnetic permeability material layer.
Claims (4)
螺旋状の１次コイルと２次コイルとを埋設してなる積層
型電子部品において、 前記磁性体層内部の内寄りには前記１次コイル又は２次
コイルの一方のコイルを配置し、その外寄りには一方の
コイルと間隔をおいて他方コイルを対向配置し、該１次
コイルと２次コイルとの間には空洞或いは低透磁率材層
を介在したことを特徴とする積層型電子部品。1. A laminated electronic component comprising a spiral primary coil and a secondary coil embedded in a magnetic layer formed of a high magnetic permeability material, wherein the inner side of the magnetic layer is inside. One of the primary coil and the secondary coil is arranged, and the other coil is arranged outside of the primary coil or the secondary coil so as to face the other coil, and a cavity is provided between the primary coil and the secondary coil. Alternatively, a laminated electronic component having a low magnetic permeability material layer interposed.
螺旋状の１次コイルと２次コイルとを埋設してなる積層
型電子部品において、 前記１次コイルと前記２次コイルとを上下に対向配置す
るとともに、該各コイルをそれぞれ間隔をおいて配置さ
れた内側コイル導体と外側コイル導体とにより構成し、
該内側コイル導体と外側コイル導体との間には空洞或い
は低透磁率材層を介在したことを特徴とする積層型電子
部品。2. A laminated electronic component in which a spiral primary coil and a secondary coil are embedded inside a magnetic layer formed of a high magnetic permeability material, wherein the primary coil and the secondary coil are provided. Are arranged to face each other vertically, and each coil is constituted by an inner coil conductor and an outer coil conductor that are arranged at intervals,
A laminated electronic component characterized in that a cavity or a low magnetic permeability material layer is interposed between the inner coil conductor and the outer coil conductor.
螺旋状の１次コイルと２次コイルとを埋設してなる積層
型電子部品において、 前記１次コイルと前記２次コイルとを上下に対向配置す
るとともに、該１次コイルの内側から該２次コイルの内
側に亘って空洞或いは低透磁率材層を配置したことを特
徴とする積層型電子部品。3. A laminated electronic component in which a spiral primary coil and a secondary coil are embedded inside a magnetic layer formed of a high magnetic permeability material, wherein the primary coil and the secondary coil are provided. And a cavity or a low-permeability material layer are arranged from the inner side of the primary coil to the inner side of the secondary coil.
螺旋状の１次コイルと２次コイルとを埋設してなる積層
型電子部品において、 前記１次コイルと前記２次コイルを左右に配置してな
り、該各コイルの外側には空洞或いは低透磁率材層を配
置したことを特徴とする積層型電子部品。4. A laminated electronic component in which a spiral primary coil and a secondary coil are embedded inside a magnetic layer formed of a high magnetic permeability material, wherein the primary coil and the secondary coil are A laminated electronic component characterized in that it is arranged on the left and right, and a cavity or a low-permeability material layer is arranged outside each coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6222189A JPH0888125A (en) | 1994-09-16 | 1994-09-16 | Laminated electronic part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6222189A JPH0888125A (en) | 1994-09-16 | 1994-09-16 | Laminated electronic part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0888125A true JPH0888125A (en) | 1996-04-02 |
Family
ID=16778555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6222189A Withdrawn JPH0888125A (en) | 1994-09-16 | 1994-09-16 | Laminated electronic part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0888125A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2008018203A1 (en) * | 2006-08-07 | 2009-12-24 | 株式会社村田製作所 | Multilayer coil component and manufacturing method thereof |
| JP2015018862A (en) * | 2013-07-09 | 2015-01-29 | 富士通株式会社 | Double helical structure electronic component, method for manufacturing double helical structure electronic component, and multifunction sheet |
| JP2015111734A (en) * | 2015-03-04 | 2015-06-18 | 株式会社村田製作所 | Coil built-in substrate and dc-dc converter module equipped with the same |
-
1994
- 1994-09-16 JP JP6222189A patent/JPH0888125A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2008018203A1 (en) * | 2006-08-07 | 2009-12-24 | 株式会社村田製作所 | Multilayer coil component and manufacturing method thereof |
| JP4737199B2 (en) * | 2006-08-07 | 2011-07-27 | 株式会社村田製作所 | Multilayer coil parts |
| JP2015018862A (en) * | 2013-07-09 | 2015-01-29 | 富士通株式会社 | Double helical structure electronic component, method for manufacturing double helical structure electronic component, and multifunction sheet |
| JP2015111734A (en) * | 2015-03-04 | 2015-06-18 | 株式会社村田製作所 | Coil built-in substrate and dc-dc converter module equipped with the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101983192B1 (en) | Coil electronic component | |
| KR20080042923A (en) | Coil device, composite coil device and transformer device | |
| KR20090015975A (en) | Inductive component and method for manufacturing an inductive component | |
| JP4831101B2 (en) | Multilayer transformer component and manufacturing method thereof | |
| JP2002270428A (en) | Laminated chip inductor | |
| EP1367611A1 (en) | Inductor part, and method of producing the same | |
| KR20050059214A (en) | Laminated coil component and method of producing the same | |
| JPH05217772A (en) | Composite laminated transformer and its production | |
| JPH06224043A (en) | Laminated chip transformer and manufacture thereof | |
| JP2770750B2 (en) | Inductance element | |
| JP3250629B2 (en) | Multilayer electronic components | |
| WO2019235510A1 (en) | Coil component and method of manufacturing same | |
| JPH0888126A (en) | Laminated transformer | |
| JPH0888125A (en) | Laminated electronic part | |
| JP5098409B2 (en) | Wound-type electronic component core, manufacturing method thereof, and wound-type electronic component | |
| JP2010080594A (en) | Laminated common mode choke coil, and method of manufacturing the same | |
| JP6212921B2 (en) | Multilayer inductor element and manufacturing method thereof | |
| JPH023605Y2 (en) | ||
| US20200211759A1 (en) | Laminated transformer and manufacturing method thereof | |
| JPH0456303A (en) | High-frequency inductor | |
| JPS58184710A (en) | Shield type transformer | |
| JP2005136037A (en) | Laminated transformer | |
| JP3220981B2 (en) | Structure of hybrid integrated circuit components | |
| KR102100348B1 (en) | A manufacturing method of power inductor and power inductor | |
| JP3811091B2 (en) | Manufacturing method of laminated transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011120 |