WO2015098355A1 - 電子部品の製造方法、電子部品 - Google Patents
電子部品の製造方法、電子部品 Download PDFInfo
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- WO2015098355A1 WO2015098355A1 PCT/JP2014/080398 JP2014080398W WO2015098355A1 WO 2015098355 A1 WO2015098355 A1 WO 2015098355A1 JP 2014080398 W JP2014080398 W JP 2014080398W WO 2015098355 A1 WO2015098355 A1 WO 2015098355A1
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- Prior art keywords
- magnetic material
- composite magnetic
- electronic component
- plate
- coil
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 239000000696 magnetic material Substances 0.000 claims abstract description 76
- 239000002131 composite material Substances 0.000 claims abstract description 75
- 239000004020 conductor Substances 0.000 claims abstract description 10
- 239000006249 magnetic particle Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus 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
- H01F41/02—Apparatus 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
- H01F41/04—Apparatus 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 for manufacturing coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2871—Pancake coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F2017/048—Fixed inductances of the signal type with magnetic core with encapsulating core, e.g. made of resin and magnetic powder
Definitions
- the present invention relates to a method for manufacturing an electronic component used for a power inductor or the like of a power supply circuit, and an electronic component.
- Power inductors used in power circuits are required to be small, low loss, and capable of handling large currents.
- an inductor has been developed that uses a composite magnetic material such as metal magnetic powder having a high saturation magnetic flux density as the magnetic material (for example, Japanese Patent No. 4714797).
- An inductor using a composite magnetic material has an advantage of a large direct current superposition allowable current.
- it is necessary to thin the portion formed of the composite magnetic material.
- the composite magnetic material is peeled off particularly in the portion where the thickness of the composite magnetic material on the side surface of the element is thin, and the yield
- the yield there was a problem that it was difficult to reduce the size.
- a core made of granulated powder is molded, and a winding is placed therein to perform compression molding one by one.
- an inductor cannot be manufactured unless a core made of granulated powder can be formed.
- the side wall has to be thinned, and a molding die for molding the core cannot be manufactured, and it is difficult to reduce the size.
- One or more embodiments of the present invention are to provide an electronic component manufacturing method and an electronic component that have a large self-inductance L and a large allowable current, a high yield, and an easy size reduction.
- Embodiment 1 In one or more embodiments of the present invention, a coil forming step of forming a coil with a linear conductor and a composite magnetic material in which magnetic particles and a resin are mixed are formed in a plate shape.
- An electronic component manufacturing method comprising: a covering step, a pressing step for pressurizing the whole, and a curing step for curing the composite magnetic material.
- One or more embodiments of the present invention are the size that can arrange a plurality of coils in at least the steps after the press-fitting step in the electronic component manufacturing method of the first embodiment.
- the method for manufacturing an electronic component is characterized in that it is performed simultaneously on a plurality of coils using the plate-like composite magnetic material.
- Embodiment 3 One or more embodiments of the present invention are characterized in that, in the electronic component manufacturing method of Embodiment 1, the pressurizing step and the curing step are performed simultaneously. It is a manufacturing method of components.
- Embodiment 4 In one or more embodiments of the present invention, a magnetic particle and a resin are mixed so as to cover a coil formed of a linear conductor and the coil except for a terminal portion.
- the electronic component is formed by curing a plate-like composite magnetic material after embedding a coil in the plate-like composite magnetic material.
- Embodiment 5 One or more embodiments of the present invention are manufactured by the electronic component manufacturing method according to any one of the first to third embodiments described above in the electronic component of the fourth embodiment. It is an electronic component characterized by the above.
- a coil forming step of forming a coil with a linear conductor, and a plate in which a composite magnetic material obtained by mixing magnetic particles and resin is formed in a plate shape A press-fitting process of embedding a coil in a plate-shaped composite magnetic material in a state where the sheet-shaped composite magnetic material is softened, a cover process of further covering the coil that cannot be covered by the press-fitting process with another softened plate-shaped composite magnetic material, A pressurizing step for pressurizing and molding the composite magnetic material, and a curing step for curing the composite magnetic material. Therefore, according to one or more embodiments of the present invention, even if the magnetic part is formed thin, it can be manufactured with high yield.
- the overall size can be reduced by reducing the thickness of the magnetic body without reducing the shape of the coil itself. Therefore, according to one or more embodiments of the present invention, even if the self-inductance L and the allowable current of the electronic component are kept large, the production can be performed with good yield and the size can be easily reduced. Can be done.
- At least the steps after the press-fitting step are performed on a plurality of coils by using a plate-shaped composite magnetic material having a size that allows a plurality of coils to be arranged side by side. Done at the same time.
- electronic components can be efficiently manufactured.
- the pressing step and the curing step are performed simultaneously. Therefore, according to one or more embodiments of the present invention, an electronic component can be efficiently manufactured and a magnetic body portion can be more firmly formed.
- a magnetic particle and a resin are mixed and cured so as to cover the coil except for the coil formed of a linear conductor and the terminal portion.
- a magnetic part formed of a composite magnetic material, and the magnetic part has a plate-like composite magnetic material in a state where the plate-like composite magnetic material, which is a composite magnetic material formed in a plate shape, is softened. After embedding in the material, the plate-like composite magnetic material is cured. Therefore, one or more embodiments of the present invention have a large self-inductance L and a permissible current, a good yield, and a small size.
- FIG. 1 is a perspective view showing a first embodiment of an electronic component 10 according to the present invention.
- FIG. 2 is a longitudinal sectional view of the electronic component 10 cut along the line ZZ in FIG. 1. It is a figure which shows the manufacturing process of the electronic component 10 of 1st Embodiment. It is a figure which shows the manufacturing process of the electronic component 10 of 1st Embodiment. It is a figure which shows the manufacturing process of the electronic component 10 of 2nd Embodiment. It is a figure which shows the manufacturing process of the electronic component 10 of 2nd Embodiment.
- FIG. 1 is a perspective view showing a first embodiment of an electronic component 10 according to the present invention.
- FIG. 2 is a longitudinal sectional view of the electronic component 10 taken along the line ZZ in FIG.
- words such as up and down are used for easy understanding, but this up and down refers to the up and down direction in the drawing and does not limit the configuration of the present invention.
- each figure shown below including FIG. 1 is a diagram schematically shown, and the size and shape of each part are appropriately exaggerated for easy understanding.
- specific numerical values, shapes, materials, and the like are shown and described, but these can be changed as appropriate.
- the electronic component 10 is an inductor including a magnetic part 11, a winding coil 12, and an external terminal 13.
- the magnetic part 11 is formed by curing a composite magnetic material in which magnetic particles and a resin are mixed.
- a composite magnetic material for example, a mixture of iron-based metal magnetic powder and epoxy resin can be used.
- the magnetic body portion 11 is provided so as to fill a portion where the winding coil 12 does not exist without a gap.
- the winding coil 12 is formed by winding a rectangular wire into two stages of ⁇ windings (outer and outer windings). Further, both end portions 12 a of the winding coil 12 extend from the same side surface of the winding coil 12 to both ends of the electronic component 10.
- the external terminal 13 is a terminal portion formed of a conductive material such as silver or copper so as to be electrically connected to both end portions 12a of the winding coil 12 at both ends of the electronic component 10.
- 3 and 4 are diagrams illustrating a manufacturing process of the electronic component 10 according to the first embodiment.
- the winding coil 12 is formed from a rectangular wire (coil forming step), and a plate-shaped composite magnetic material 111 that is a material of the magnetic body portion 11 is prepared.
- the plate-like composite magnetic material 111 is heated from 70 ° C. to 120 ° C., and the plate-like composite magnetic material 111 is softened. As shown in FIG. The composite magnetic material 111 is pressed by a press die P to embed the winding coil 12 in the plate-shaped composite magnetic material 111.
- the winding coil 12 that has been left uncovered in the second step is disposed so as to be further covered with the softened other plate-like composite magnetic material 111. . And this is pressed by the press die P. Thereby, the upper surface of the winding coil 12 can also be covered with the plate-shaped composite magnetic material 111, and it becomes a form shown in FIG.4 (d).
- external terminals 13 are formed at both ends by dipping a conductive paste such as silver or copper or applying a conductive material such as silver or copper by sputtering or plating.
- a conductive paste such as silver or copper
- a conductive material such as silver or copper by sputtering or plating.
- the external terminal 13 can be formed in an L shape over the bottom surface and the end surface of the magnetic body portion 11, can be formed only on the bottom surface of the magnetic body portion 11, or can be formed in various shapes.
- the steps after the press-fitting step are performed on the plurality of winding coils 12 using the plate-shaped composite magnetic material 111 having a size that allows the plurality of winding coils 12 to be arranged side by side. Done at the same time. Thereby, the electronic component 10 can be manufactured efficiently.
- the winding coil 12 is first formed, and this is pressed into the plate-shaped composite magnetic material 111 to pressurize and cure the composite magnetic material, thereby manufacturing the electronic component 10. did. Therefore, even if the magnetic part 11 is formed thin, it can be manufactured with high yield. That is, according to the first embodiment, the overall size can be reduced by reducing the thickness of the magnetic body portion 11 without reducing the shape of the coil itself. Therefore, according to the first embodiment, even if the self-inductance L and the allowable current of the electronic component 10 are kept large, manufacturing can be performed with good yield, and miniaturization can be easily performed.
- the first embodiment it is possible to manufacture a plurality of electronic components 10 at the same time by arranging a plurality of winding coils 12 with respect to the plate-shaped composite magnetic material 111, thereby efficiently manufacturing the electronic components 10. It can be carried out.
- the electronic component 10 of the second embodiment has the same form as the electronic component 10 of the first embodiment, except that the manufacturing method is partially different. Therefore, the same reference numerals are given to the portions that perform the same functions as those in the first embodiment described above, and repeated descriptions are omitted as appropriate.
- 5 and 6 are diagrams showing a manufacturing process of the electronic component 10 of the second embodiment.
- the winding coil 12 is formed from a rectangular wire (coil forming step), and a plate-like composite magnetic material 111 that is a material of the magnetic body portion 11 is prepared.
- the thickness of the plate-shaped composite magnetic material 111 prepared here is substantially the same as the height of the winding coil 12.
- the plate-like composite magnetic material 111 is heated from 70 ° C. to 120 ° C., and the plate-like composite magnetic material 111 is softened. As shown in FIG. The composite magnetic material 111 is pressed by a press die P to embed the winding coil 12 in the plate-shaped composite magnetic material 111. When the embedding is completed, as shown in FIG. 5C, the upper and lower end portions of the winding coil 12 are in a state where the amount of the composite magnetic material attached is small or partly exposed.
- the other two softened plate-like composite magnetic materials 111 are arranged above and below the winding coil 12 that is not covered in the second step. Then, the winding coil 12 is pressed by a press die P so that the upper and lower sides of the winding coil 12 can be further covered with the two plate-like composite magnetic materials 111. Thereby, both the upper surface and the lower surface of the winding coil 12 can be covered with the plate-like composite magnetic material 111, and the configuration shown in FIG. In the second embodiment, by arranging the plate-like composite magnetic material 111 on both the upper and lower sides, the thickness of the magnetic part 11 (composite magnetic material) formed above and below the winding coil 12 can be controlled more accurately. is there.
- the thicknesses of the magnetic body portions 11 on both the upper and lower surfaces can be accurately controlled, and the upper and lower surfaces can be formed to a thickness closer to the limit because the manufacturing variation is reduced. Therefore, according to the manufacturing method of this embodiment, the electronic component 10 can be reduced in size. Note that the pressurization and curing may be performed separately or simultaneously.
- external terminals 13 are formed at both ends by dipping a conductive paste such as silver or copper or applying a conductive material such as silver or copper by sputtering or plating.
- a conductive paste such as silver or copper
- a conductive material such as silver or copper by sputtering or plating.
- the external terminal 13 can be formed in an L shape over the bottom surface and the end surface of the magnetic body portion 11, can be formed only on the bottom surface of the magnetic body portion 11, or can be formed in various shapes.
- the steps after the press-fitting step are performed using the plate-shaped composite magnetic material 111 having a size that allows the plurality of winding coils 12 to be arranged side by side.
- the winding coil 12 is simultaneously performed. Thereby, the electronic component 10 can be manufactured efficiently.
- the coiled coil 12 is sandwiched and covered by the two plate-like composite magnetic materials 111 from both sides. Therefore, the vertical dimension control can be performed more accurately, and the electronic component 10 can be manufactured with a higher yield and a smaller size.
- the winding coil 12 has been described with an example in which the winding coil 12 is ⁇ -wound.
- the winding coil may be a normal winding method in which end portions are drawn out from each of the outer peripheral side and the inner peripheral side.
- the winding coil 12 has been described with an example having a two-stage configuration.
- the winding coil may have four stages or any configuration.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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- Coils Or Transformers For Communication (AREA)
- Insulating Of Coils (AREA)
Abstract
Description
図1は、本発明による電子部品10の第1実施形態を示す斜視図である。
図2は、電子部品10を図1中のZ-Z線に沿って切断した縦断面図である。
なお、以下の説明において、理解を容易にするために上下等の文言を用いるが、この上下とは、図中における上下方向を指すものであり、本発明の構成を限定するものではない。
また、図1を含め、以下に示す各図は、模式的に示した図であり、各部の大きさ、形状は、理解を容易にするために、適宜誇張して示している。
さらに、以下の説明では、具体的な数値、形状、材料等を示して説明を行うが、これらは、適宜変更することができる。
図3及び図4は、第1実施形態の電子部品10の製造工程を示す図である。
先ず、図3(a)に示すように、巻線コイル12を平角線から形成し(コイル形成工程)、また、磁性体部11の素材である板状複合磁性材料111を用意する。
次に、板状複合磁性材料111を70℃から120℃に加温して、板状複合磁性材料111が軟化した状態で、図3(b)に示すように、巻線コイル12を板状複合磁性材料111に対してプレス金型Pによりプレスして、巻線コイル12を板状複合磁性材料111に埋め込む。
次に、図4(c)に示すように、第2工程では覆いきれずに突出して残った巻線コイル12を、軟化させた他の板状複合磁性材料111によりさらに覆うようにして配置する。そして、これをプレス金型Pによりプレスする。これにより、巻線コイル12の上面も板状複合磁性材料111により覆うことができ、図4(d)に示す形態となる。
次に、図4(d)に示した状態のまま、150℃から200℃に保ちながら全体を加圧(プレス)して成形し(加圧工程)、磁性体部11(複合磁性材料)を硬化させる(硬化工程)。この加圧工程及び硬化工程により磁性体部11が強固に形成されることから、巻線コイル12から外径形状までの距離を、例えば、100μmから200μm程度に薄く形成しても、剥離等が生じず、歩留まりよく製造が可能である。よって、本実施形態の製造方法によれば、電子部品10は、小型化が可能である。
なお、加圧と硬化は、別々に行ってもよいし、150℃から200℃に保ちながら全体を加圧して成形する際に、同時に磁性体部11を硬化させてもよい。
最後に、図4(e)に示すように、銀や銅などの導電ペーストをディップしたり、銀や銅などの導電材料をスパッタ、めっきなどで施したりして外部端子13を両端に形成して、電子部品10が完成する。なお、第4工程と第5工程との間に、所定の外径形状に切断する切断工程等を適宜設けることができる。外部端子13は、磁性体部11の底面と端面に渡ってL字状に形成したり、磁性体部11の底面にのみ形成したり様々な形状に形成することができる。
したがって、第1実施形態によれば、電子部品10の自己インダクタンスL及び許容電流を大きく保ったままであっても、歩留まりがよく製造が可能であり、かつ、小型化を容易に行える。
また、第1実施形態によれば、板状複合磁性材料111に対して複数の巻線コイル12を整列配置して同時に複数の電子部品10を製造可能であり、効率よく電子部品10の製造を行うことができる。
第2実施形態の電子部品10は、製造方法が部分的に異なる他は、第1実施形態の電子部品10と同様な形態をしている。よって、前述した第1実施形態と同様の機能を果たす部分には、同一の符号を付して、重複する説明を適宜省略する。
図5及び図6は、第2実施形態の電子部品10の製造工程を示す図である。
先ず、図5(a)に示すように、巻線コイル12を平角線から形成し(コイル形成工程)、また、磁性体部11の素材である板状複合磁性材料111を用意する。ここで準備する板状複合磁性材料111の厚さは、巻線コイル12の高さと略一致した厚さとしている。
次に、板状複合磁性材料111を70℃から120℃に加温して、板状複合磁性材料111が軟化した状態で、図5(b)に示すように、巻線コイル12を板状複合磁性材料111に対してプレス金型Pによりプレスして、巻線コイル12を板状複合磁性材料111に埋め込む。
埋め込みが完了すると、図5(c)に示すように、巻線コイル12の上下端部は、複合磁性材料の付着量が僅かであるか、一部露出する状態である。
次に、図6(d)に示すように、第2工程では覆いきれていない巻線コイル12の上下それぞれに、軟化させた他の2枚の板状複合磁性材料111を配置する。そして、巻線コイル12の上下をこれら2枚の板状複合磁性材料111によりさらに覆うことができるように、これをプレス金型Pによりプレスする。これにより、巻線コイル12の上面も下面も、板状複合磁性材料111により覆うことができ、図6(e)に示す形態となる。第2実施形態では、上下両側に板状複合磁性材料111を配置することにより、巻線コイル12の上下に形成される磁性体部11(複合磁性材料)の厚さをより正確に制御可能である。
次に、図6(e)に示した状態のまま、150℃から200℃に保ちながら全体を加圧(プレス)して成形し(加圧工程)、磁性体部11(複合磁性材料)を硬化させる(硬化工程)。この加圧工程及び硬化工程により磁性体部11が強固に形成されることから、巻線コイル12から外径形状までの距離を、例えば、100μmから200μm程度に薄く形成しても、剥離等が生じず、歩留まりよく製造が可能である。また、第2実施形態では、上下両面の磁性体部11の厚さも正確に制御できることから、この上下面についても、製造バラツキが減ることから、より限界に近い薄さまで形成が可能である。よって、本実施形態の製造方法によれば、電子部品10は、小型化が可能である。なお、加圧と硬化は、別々に行ってもよいし、同時に行ってもよい。
最後に、図6(f)に示すように、銀や銅などの導電ペーストをディップしたり、銀や銅などの導電材料をスパッタ、めっきなどで施したりして外部端子13を両端に形成して、電子部品10が完成する。なお、第4工程と第5工程との間に、所定の外径形状に切断する切断工程等を適宜設けることができる。外部端子13は、磁性体部11の底面と端面に渡ってL字状に形成したり、磁性体部11の底面にのみ形成したり様々な形状に形成することができる。
以上説明した実施形態に限定されることなく、種々の変形や変更が可能であって、それらも本発明の範囲内である。
11 磁性体部
12 巻線コイル
12a 両端部
13 外部端子
111 板状複合磁性材料
P プレス金型
Claims (5)
- 線状の導体によりコイルを形成するコイル形成工程と、
磁性体粒子と樹脂とを混合した複合磁性材料が板状に形成された板状複合磁性材料を軟化させた状態で前記コイルを前記板状複合磁性材料に埋め込む圧入工程と、
前記圧入工程では覆いきれない前記コイルを、軟化させた他の板状複合磁性材料によりさらに覆うカバー工程と、
全体を加圧して成形する加圧工程と、
前記複合磁性材料を硬化させる硬化工程と、
を備える電子部品の製造方法。 - 請求項1に記載の電子部品の製造方法において、
少なくとも前記圧入工程以降の工程は、複数のコイルを並べて配置可能な大きさの前記板状複合磁性材料を用いて、複数のコイルに対して同時に行われること、
を特徴とする電子部品の製造方法。 - 請求項1に記載の電子部品の製造方法において、
前記加圧工程と前記硬化工程が同時に行われること、
を特徴とする電子部品の製造方法。 - 線状の導体により形成されているコイルと、
端子部を除いて前記コイルを覆うように磁性体粒子と樹脂とを混合して硬化させた複合磁性材料により形成された磁性体部と、
を有し、
前記磁性体部は、板状に形成された前記複合磁性材料である板状複合磁性材料を軟化させた状態で前記コイルを前記板状複合磁性材料に埋め込んだ後に前記板状複合磁性材料を硬化させることにより形成されていること、
を特徴とする電子部品。 - 請求項4に記載の電子部品において、
請求項1から請求項3までのいずれか1項に記載の電子部品の製造方法により製造されていること、
を特徴とする電子部品。
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KR1020167007116A KR101807786B1 (ko) | 2013-12-27 | 2014-11-17 | 전자 부품의 제조 방법 및 전자 부품 |
CN201480057951.0A CN105684110A (zh) | 2013-12-27 | 2014-11-17 | 电子元件的制造方法和电子元件 |
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TW201530580A (zh) | 2015-08-01 |
CN105684110A (zh) | 2016-06-15 |
US10026549B2 (en) | 2018-07-17 |
US20160322160A1 (en) | 2016-11-03 |
KR20160045102A (ko) | 2016-04-26 |
TWI629699B (zh) | 2018-07-11 |
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