WO2022181183A1 - Composant inducteur - Google Patents

Composant inducteur Download PDF

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Publication number
WO2022181183A1
WO2022181183A1 PCT/JP2022/003069 JP2022003069W WO2022181183A1 WO 2022181183 A1 WO2022181183 A1 WO 2022181183A1 JP 2022003069 W JP2022003069 W JP 2022003069W WO 2022181183 A1 WO2022181183 A1 WO 2022181183A1
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WO
WIPO (PCT)
Prior art keywords
axis
magnetic
direction along
ribbons
along
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PCT/JP2022/003069
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English (en)
Japanese (ja)
Inventor
敢 三宅
博美 辻
充 小田原
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株式会社村田製作所
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Publication of WO2022181183A1 publication Critical patent/WO2022181183A1/fr

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    • 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
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • 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

Definitions

  • the present disclosure relates to inductor components.
  • the inductor component described in Patent Document 1 includes an element body and inductor wiring extending inside the element body.
  • the base body is made of a composite body containing inorganic filler and resin.
  • a magnetic composite body among composite bodies contains a magnetic material as a material of an inorganic filler.
  • An inductor component for solving the above problems includes a plurality of flat magnetic ribbons made of a magnetic material, and the plurality of magnetic ribbons are laminated in a direction orthogonal to a main surface of the magnetic ribbons. and an inductor wiring extending along the main surface inside the element.
  • a row of the magnetic ribbons is configured by arranging a plurality of the magnetic ribbons in a direction along the first axis.
  • the average value of the minimum dimensions of the plurality of magnetic ribbons in the direction along the first axis is defined as a first dimension average value
  • the spacing between the magnetic ribbons adjacent to each other in the direction along the first axis There is a portion where the minimum dimension of is 1.01% or more with respect to the first dimension average value.
  • the inventors of the present invention have Research was conducted to suppress the increase in current loss, and the following findings were obtained. That is, in a row of magnetic ribbons configured by arranging a plurality of magnetic ribbons in a direction along the first axis, the dimension of the interval between adjacent magnetic ribbons is 1.0% with respect to the first average dimension value. If there is a portion of 01% or more, it is possible to suppress an increase in the eddy current loss of the inductor component.
  • first axis means not only those that are in direct contact with the first axis and along the first axis, but also those that are not in direct contact with the first axis and are along the first axis at a distance. Also includes Also, “along” means that they are substantially in parallel, and includes those that are slightly inclined due to manufacturing errors or the like.
  • FIG. 3 is an exploded perspective view of an inductor component; FIG. The top view which shows the 1st part of the same inductor component.
  • FIG. 3 is a cross-sectional view of the inductor component taken along line 3-3 in FIG. 2;
  • FIG. 3 is a cross-sectional view of the inductor component taken along line 4-4 in FIG. 2;
  • FIG. 4 is a schematic diagram showing the positional relationship between magnetic strips that are adjacent in the direction along the first axis.
  • FIG. 4 is a schematic diagram showing the positional relationship between adjacent magnetic strips in the direction along the central axis of inductor wiring.
  • inductor component An embodiment of the inductor component will be described below.
  • the drawings may show constituent elements in an enlarged manner.
  • the dimensional ratios of components may differ from those in reality or in other figures.
  • cross-sectional views are hatched, there are cases where the hatching of some components is omitted to facilitate understanding.
  • inductor component 10 includes element body 20 and inductor wiring 30 .
  • the element body 20 has a plurality of magnetic ribbons 40 .
  • the magnetic ribbon 40 is flat.
  • a plurality of magnetic ribbons 40 are laminated in a direction orthogonal to the main surface MF of the magnetic ribbons 40 .
  • the flat plate shape means a thin shape having a main surface, but it is not limited to a rectangular parallelepiped with a thin thickness. There may be holes inside.
  • the inductor wiring 30 extends linearly along the main surface MF inside the element body 20 .
  • the axis along which inductor wiring 30 extends is defined as central axis CA.
  • the direction in which the central axis CA extends matches the direction in which one of the sides of the quadrangular main surface MF extends.
  • the axis along the main surface MF is defined as a first axis X
  • the axis perpendicular to the main surface MF is defined as a second axis Z.
  • One of the two directions along the first axis X is defined as a first positive direction X1
  • the direction opposite to the first positive direction X1 is defined as a first negative direction X2.
  • one of the two directions along the second axis Z is defined as a second positive direction Z1, and the direction opposite to the second positive direction Z1 is defined as a second negative direction Z2.
  • one of the two directions along the central axis CA is defined as the positive direction Y1, and the opposite direction of the positive direction Y1 is defined as the negative direction Y2.
  • the inductor component 10 is composed of a first portion P1, a second portion P2, and a third portion P3, which are sequentially laminated along the second axis Z.
  • the three parts P1-P3 are aligned along the second axis Z.
  • the first portion P1 is positioned at the end in the second negative direction Z2.
  • the first portion P1 has a square shape when viewed from the direction along the second axis Z.
  • the first portion P ⁇ b>1 has a plurality of magnetic strips 40 , a plurality of nonmagnetic layers 50 , a plurality of nonmagnetic portions 60 , and a plurality of nonmagnetic films 70 .
  • each magnetic ribbon 40 of the first portion P1 is laminated in the direction along the second axis Z in a cross-sectional view perpendicular to the central axis CA.
  • each magnetic ribbon 40 of the first portion P1 has a square shape when viewed from the direction along the second axis Z.
  • each side of each magnetic ribbon 40 is parallel to the first axis X or the central axis CA. All the dimensions in the direction along the second axis Z of the plurality of magnetic strips 40 are the same.
  • two magnetic ribbons 40 are arranged side by side at the same position along the second axis Z in the direction along the third axis orthogonal to the second axis Z with a gap therebetween.
  • two magnetic strips 40 are arranged at the same position along the second axis Z with a gap in the direction along the fourth axis perpendicular to the second axis Z and the third axis. That is, in the element body 20, a plurality of magnetic ribbons 40 are aligned in a row in the direction along the third axis. Further, in the element body 20, a plurality of magnetic ribbons 40 are arranged in a row in the direction along the fourth axis.
  • two magnetic ribbons 40 are aligned in the direction along the third axis at the same position along the second axis Z to form a third axis row.
  • Two magnetic strips 40 are aligned in the direction along the fourth axis at the same position along the second axis Z to form a fourth axis row.
  • the third axis is coaxial with the central axis CA, and the fourth axis coincides with the first axis X. Therefore, in the element body 20 , it can be said that a row of the magnetic ribbons 40 is configured by arranging the plurality of magnetic ribbons 40 in the direction along the first axis X. As shown in FIG.
  • the magnetic ribbon 40 is made of a magnetic material.
  • a magnetic ribbon containing a magnetic material in an amorphous state is defined as an amorphous magnetic ribbon, for example, all the magnetic ribbons 40 are amorphous magnetic ribbons. It should be noted that it is not essential to use the magnetic ribbon 40 as an amorphous magnetic ribbon.
  • a magnetic material is, for example, a magnetic material containing 1 or more and 4 or less elements.
  • Elements include, for example, Fe elements, Ni elements, Co elements, Cu elements, Al elements, Si elements, Cr elements, B elements, P elements, and the like.
  • FeSiBCr and FeSiB are examples of amorphous magnetic materials composed of such elements.
  • the nonmagnetic layer 50 is positioned between the magnetic ribbons 40 adjacent to each other in the direction along the second axis Z. As shown in FIGS. The non-magnetic layer 50 fills all the spaces between the magnetic strips 40 adjacent to each other in the direction along the second Z axis.
  • the non-magnetic layer 50 is made of a non-magnetic material. Non-magnetic materials are, for example, acrylic resins, epoxy resins, and silicone resins.
  • a non-magnetic material in the row of the magnetic ribbons 40 configured by arranging the plurality of magnetic ribbons 40 in the direction along the first axis X, between the magnetic ribbons 40 adjacent to each other, a non-magnetic material It can be said that a non-magnetic portion is located. 3 and 4, the non-magnetic layer 50 is illustrated by lines.
  • each nonmagnetic layer 50 is smaller than the dimension along the second axis Z of each magnetic ribbon 40 .
  • the non-magnetic portion 60 is located between the magnetic strips 40 aligned at the same position along the second axis Z.
  • the non-magnetic portion 60 fills all the spaces between the magnetic strips 40 arranged at the same position in the direction along the second axis Z.
  • the non-magnetic portion 60 is made of a non-magnetic material.
  • the non-magnetic material is interposed between the magnetic ribbons 40 adjacent to each other in the direction orthogonal to the second axis Z.
  • the material of the non-magnetic portion 60 is the same material as that of the non-magnetic layer 50 .
  • the non-magnetic film 70 is positioned at each of the ends of the first positive direction X1 and the first negative direction X2 in the first portion P1.
  • the non-magnetic film 70 covers the entire end surfaces of the magnetic ribbon 40 in the direction along the first axis X.
  • the non-magnetic film 70 covers the entire end surfaces of the non-magnetic layer 50 in the direction along the first axis X.
  • the non-magnetic film 70 covers the entire end surfaces of the non-magnetic portion 60 in the direction along the first axis X. As shown in FIG.
  • the end faces of the first portion P1 in the first positive direction X1 along the first axis X are all composed of the non-magnetic film 70 .
  • the end face of the first portion P1 along the first axis X in the first negative direction X2 is entirely composed of the non-magnetic film 70 .
  • the non-magnetic film 70 is made of a non-magnetic material. In this embodiment, the material of the non-magnetic film 70 is the same as that of the non-magnetic layer 50 .
  • the second portion P2 is located in the second positive direction Z1 when viewed from the first portion P1.
  • the second portion P2 is composed of an inductor wiring 30, a plurality of magnetic ribbons 40, a plurality of non-magnetic layers 50, a non-magnetic portion 60, and a plurality of non-magnetic films .
  • the inductor wiring 30 has a rectangular shape when viewed from the direction along the second axis Z, and extends linearly along the central axis CA.
  • the end face of the inductor wiring 30 in the positive direction Y1 constitutes part of the outer surface of the second portion P2 and is exposed from the element body 20 .
  • the end face of the inductor wiring 30 in the negative direction Y2 constitutes part of the outer surface of the second portion P2 and is exposed from the element body 20 .
  • the end face of the inductor wiring 30 in the positive direction Y1 and the end face in the negative direction Y2 are parallel to the first axis X.
  • the central axis CA of the inductor wiring 30 is positioned at the center of the second portion P2 in the direction along the first axis X. As shown in FIG. Therefore, the central axis CA, which is the axis along which the inductor wiring 30 extends, passes through the center of the second portion P2 in the direction along the first axis X.
  • the dimension along the first axis X of the inductor wiring 30 is half the dimension along the first axis X of the second portion P2.
  • the material of the inductor wiring 30 is a conductive material. Conductive materials are, for example, Cu, Ag, Au, Al, or alloys thereof. In this embodiment, the material of the inductor wiring 30 is Cu. As shown in FIG. 3, in a cross section orthogonal to the central axis CA, a hypothetical wire circumscribing the inductor wiring 30 and having the smallest area having a first side along the first axis X and a second side along the second axis Z Draw a rectangle VR. In this embodiment, the inductor wiring 30 is rectangular in the cross section perpendicular to the central axis CA.
  • the long side of the outer shape of the inductor wiring 30 is along the first axis X in the cross section perpendicular to the central axis CA. Furthermore, the short side of the inductor wiring 30 is along the second axis Z in the cross section orthogonal to the central axis CA. Therefore, the virtual rectangle VR matches the contour of the inductor wiring 30 . A first side of the virtual rectangle VR is longer than a second side of the virtual rectangle VR.
  • portions other than the inductor wiring 30 are composed of a plurality of magnetic strips 40, a plurality of nonmagnetic layers 50, a plurality of nonmagnetic portions 60, a plurality of nonmagnetic films, as in the first portion P1. 70 and .
  • each magnetic ribbon 40 of the second portion P2 is laminated in the direction along the second axis Z in a cross-sectional view orthogonal to the central axis CA.
  • each magnetic strip 40 of the second portion P2 has a rectangular shape when viewed from the direction along the second axis Z.
  • the long side of each magnetic strip 40 is parallel to the central axis CA when viewed from the direction along the second axis Z.
  • All the dimensions in the direction along the second axis Z of the plurality of magnetic strips 40 are the same.
  • the magnetic ribbon 40 is arranged both in the first positive direction X1 relative to the inductor wiring 30 and in the first negative direction X2 relative to the inductor wiring 30. That is, in the second portion P2, two magnetic strips 40 are arranged in a line along the first axis X with the inductor wiring 30 interposed therebetween. In addition, two magnetic strips 40 are arranged at the same position along the second axis Z and spaced apart in the direction along the central axis CA.
  • the non-magnetic layer 50 of the second portion P2 is positioned between the magnetic strips 40 adjacent to each other in the direction along the second axis Z, similarly to the first portion P1 described above. That is, as shown in FIGS. 3 and 4, the magnetic ribbons 40 and the nonmagnetic layers 50 are alternately laminated in the direction along the second axis Z, like the first portion P1.
  • the non-magnetic portion 60 of the second portion P2 is located between the magnetic strips 40 arranged at the same position along the second axis Z.
  • the non-magnetic portion 60 fills all the spaces between the magnetic strips 40 arranged at the same position in the direction along the second axis Z.
  • the non-magnetic material is interposed between the magnetic ribbons 40 adjacent to each other in the direction perpendicular to the second axis Z.
  • the position of the non-magnetic portion 60 of the second portion P2 overlaps part of the non-magnetic portion 60 of the first portion P1 when viewed from the direction along the second axis Z.
  • the non-magnetic portion 60 of the second portion P2 is continuous with the non-magnetic portion 60 of the first portion P1.
  • the non-magnetic portion 60 may not be present between the inductor wiring 30 and the magnetic ribbon 40, or the non-magnetic portion 60 may be present between the inductor wiring 30 and the magnetic ribbon 40. may be present.
  • the non-magnetic film 70 is located at the end of the first positive direction X1 and the end of the first negative direction X2 in the second portion P2.
  • the non-magnetic film 70 of the second portion P2 is continuous with the non-magnetic film 70 of the first portion P1.
  • the third portion P3 is located in the second positive direction Z1 of the second portion P2. When viewed from the second axis Z, the third portion P3 has the same square shape as the first portion P1.
  • the third portion P3 is composed of a plurality of magnetic strips 40, a plurality of non-magnetic layers 50, a plurality of non-magnetic portions 60, and a plurality of non-magnetic films .
  • the third portion P3 has a structure symmetrical with the first portion P1 with the second portion P2 interposed therebetween, and thus detailed description thereof will be omitted.
  • FIG. 5 is a schematic diagram showing the positional relationship between the magnetic strips 40 adjacent in the direction along the first axis X.
  • the magnetic ribbon 40 (111) and the magnetic ribbon 40 (121) of the plurality of magnetic ribbons 40 are adjacent to each other in the direction along the first axis X.
  • the magnetic ribbon 40 (111) is arranged in the first negative direction X2, and the magnetic ribbon 40 (121) is arranged in the first positive direction X1.
  • the magnetic ribbon 40 (211) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (111), and the magnetic ribbon 40 (221) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (121). It is Therefore, the magnetic ribbon 40 (211) and the magnetic ribbon 40 (221) are adjacent to each other in the direction along the first axis X.
  • the magnetic ribbon 40 (311) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (211), and the magnetic ribbon 40 (321) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (221). It is Therefore, the magnetic ribbon 40 (311) and the magnetic ribbon 40 (321) are adjacent to each other in the direction along the first axis X. As shown in FIG.
  • the first dimension of the spacing between a pair of magnetic strips 40 adjacent in the direction along the first axis X is defined as the first dimension of the spacing
  • the position for measuring the dimension of the first spacing is changed in the direction along the second axis Z.
  • the first axis spacing dimension can change. Therefore, the portion where the first axial interval dimension between two magnetic ribbons 40 adjacent in the direction along the first axis X is the smallest is defined as the first axial interval minimum portion, and the first axial interval is defined as the first axial interval minimum portion.
  • the interval dimension be the first axial interval dimension minimum value SLx. That is, the minimum first axis spacing dimension SLx is the minimum dimension of the spacing between the magnetic strips 40 adjacent to each other in the direction along the first axis X. As shown in FIG.
  • the first axial spacing dimension minimum value SLx between the magnetic ribbon 40 (111) and the magnetic ribbon 40 (121) adjacent in the direction along the first axis X is referred to as the first axial spacing dimension minimum value SLx (11).
  • a first minimum axial spacing dimension SLx between the magnetic ribbons 40 (211) and 40 (221) adjacent to each other in the direction along the first axis X is referred to as a first minimum axial spacing dimension SLx (21).
  • the first minimum axial spacing dimension SLx between the magnetic ribbons 40 (311) and 40 (321) adjacent to each other in the direction along the first axis X is referred to as the first minimum axial spacing dimension SLx (31).
  • the dimension of the magnetic ribbon 40 in the direction along the first axis X is defined as the first axis magnetic ribbon dimension.
  • the portion where the first axis magnetic ribbon dimension is the smallest in one magnetic ribbon 40 is defined as the first axis magnetic ribbon minimum portion, and the first axis magnetic ribbon dimension at the first axis magnetic ribbon minimum portion is:
  • the minimum dimension of the first axis magnetic ribbon is SZx.
  • a row composed of a plurality of magnetic strips 40 arranged in the direction along the first axis X is called a first axis row.
  • a plurality of first shaft rows are configured in the first portion P1.
  • the average value of the first axial magnetic ribbon dimension minimum values SZx of the plurality of magnetic ribbons 40 constituting one first axial row is defined as the first axial dimension average value SZxAvP1.
  • the average value of the first axial spacing dimension minimum values SLx of the magnetic strips 40 that constitute the first axial row and are adjacent to each other is defined as a first axial spacing dimension average value SLxAvP1.
  • the first axial row of the first portion P1 satisfies the following relational expression (formula 1).
  • the dimension of the interval between the magnetic ribbons 40 is A portion of 1.01% or more comes to exist.
  • a plurality of first shaft rows are configured in the third portion P3.
  • the average value of the first axial magnetic ribbon dimension minimum values SZx of the plurality of magnetic ribbons 40 constituting one first axial row is defined as the first axial dimension average value SZxAvP3.
  • the average value of the first axial spacing dimension minimum values SLx of the magnetic ribbons 40 that constitute the first axial row and are adjacent to each other is defined as a first axial spacing dimension average value SLxAvP3.
  • the first axial row of the third portion P3 satisfies the following relational expression (formula 2).
  • the interval dimension of the magnetic ribbons 40 is A portion of 1.01% or more comes to exist.
  • the first axis X coincides with the fourth axis. Therefore, when the average value of the dimensions in the direction along the fourth axis of the plurality of magnetic strips 40 constituting one fourth axis row is defined as the fourth axis dimension average value, the first axis dimension average values SZxAvP1 and SZxAvP3 are , corresponding to the fourth axis dimension mean value. Therefore, in the present embodiment, between the magnetic ribbons 40 adjacent in the direction along the fourth axis, the dimension of the interval between the magnetic ribbons 40 is 1.01% or more of the average dimension of the fourth axis. It can be said that there are some parts.
  • FIG. 6 is a schematic diagram showing the positional relationship between the magnetic ribbons 40 adjacent in the direction along the central axis CA.
  • the magnetic ribbon 40 (121) and the magnetic ribbon 40 (122) are adjacent in the direction along the central axis CA.
  • the magnetic ribbon 40 (121) is arranged in the negative direction Y2, and the magnetic ribbon 40 (122) is arranged in the positive direction Y1.
  • the magnetic ribbon 40 (221) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (121), and the magnetic ribbon 40 (222) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (122). It is Therefore, the magnetic ribbon 40 (221) and the magnetic ribbon 40 (222) are adjacent to each other in the direction along the central axis CA.
  • the magnetic ribbon 40 (321) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (221), and the magnetic ribbon 40 (322) is arranged in the second negative direction Z2 of the magnetic ribbon 40 (222). It is Therefore, the magnetic ribbon 40 (321) and the magnetic ribbon 40 (322) are adjacent to each other in the direction along the central axis CA.
  • the dimension of the spacing between a pair of magnetic ribbons 40 adjacent in the direction along the central axis CA is the center axis spacing dimension
  • changing the position for measuring the center axis spacing dimension in the direction along the second axis Z results in the center Axle spacing dimensions can vary. Therefore, the portion where the center axis interval dimension between two magnetic ribbons 40 adjacent in the direction along the center axis CA is the smallest is defined as the center axis interval minimum portion, and the center axis interval dimension at the center axis interval portion is defined as the center axis interval.
  • the shaft interval dimension minimum value SLy is assumed that the shaft interval dimension minimum value SLy.
  • the minimum center axis spacing dimension SLy between the magnetic ribbons 40 (121) and 40 (122) adjacent to each other in the direction along the center axis CA is referred to as the center axis spacing minimum dimension SLy (12).
  • the center axis spacing dimension between the magnetic ribbons 40 (221) and 40 (222) adjacent to each other in the direction along the center axis CA is referred to as a center axis spacing dimension minimum value SLy (22).
  • the center axis spacing dimension between the magnetic ribbons 40 (321) and 40 (322) adjacent to each other in the direction along the center axis CA is referred to as the center axis spacing dimension minimum value SLy (32).
  • the dimension of the magnetic ribbon 40 in the direction along the central axis CA is defined as the central axis magnetic ribbon dimension.
  • the portion where the dimension of the central axis magnetic ribbon is the smallest is defined as the minimum portion of the central axis magnetic ribbon
  • the dimension of the central axis magnetic ribbon at the central axis magnetic ribbon minimum portion is defined as the central axis magnetic ribbon.
  • the band size minimum value is SZy.
  • a row composed of a plurality of magnetic ribbons 40 arranged in a direction along the central axis CA is called a central axis row.
  • a plurality of central shaft rows are configured in the first portion P1.
  • the average value of the central axis magnetic ribbon dimension minimum values SZy of the plurality of magnetic ribbons 40 constituting one central axis row is defined as the central axis dimension average value SZyAvP1.
  • the average value of the minimum center axis spacing dimension SLy of the adjacent magnetic strips 40 constituting the center axis row is defined as the center axis spacing average value SLyAvP1.
  • the central axis row of the first portion P1 satisfies the following relational expression (Equation 3).
  • the interval dimension of the magnetic ribbons 40 is 1.01 with respect to the central axis dimension average value SZyAvP1. % or more will exist.
  • a plurality of central axis rows are configured in the third portion P3.
  • the average value of the central axis magnetic ribbon dimension minimum values SZy of the plurality of magnetic ribbons 40 constituting one central axis row is defined as the central axis dimension average value SZyAvP3.
  • the average value of the minimum center axis spacing dimension SLy of the adjacent magnetic strips 40 constituting the center axis row is defined as the center axis spacing average value SLyAvP3.
  • Equation 4 is satisfied in the central axis row of the third portion P3.
  • the interval between the magnetic ribbons 40 adjacent in the direction along the central axis CA is 1.01% of the central axis dimension average value SZyAvP3.
  • the central axis CA coincides with the third axis. Therefore, when the average value of the dimensions in the direction along the third axis of the plurality of magnetic strips 40 constituting one third axis row is defined as the third axis dimension average value, the central axis dimension average values SZyAvP1 and SZyAvP3 are: Corresponds to the third dimension mean value. Therefore, in the present embodiment, between the magnetic ribbons 40 adjacent in the direction along the third axis, the dimension of the interval between the magnetic ribbons 40 is 1.01% or more of the average value of the dimension of the third axis. It can be said that there are some parts.
  • the end of the inductor wiring 30 in the first positive direction X1 is defined as the first wiring end IP1
  • the first negative The end in the direction X2 is defined as a second wiring end IP2.
  • the magnetic ribbon 40 having the shortest distance along the second axis Z from the first wiring end IP1 is selected as the first magnetic ribbon.
  • a ribbon 41 is used.
  • the end in the first positive direction X1 is called a first end MP11
  • the end in the first negative direction X2 is called a second end MP12.
  • the magnetic ribbon 40 having the shortest distance along the second axis Z from the second wiring end IP2 is selected as the first magnetic ribbon 40.
  • 2 magnetic ribbon 42 .
  • the end in the first positive direction X1 is called a first end MP21
  • the end in the first negative direction X2 is called a second end MP22.
  • the magnetic ribbon 40 which at least partially overlaps the inductor wiring 30 when viewed from the direction along the second axis Z, is the magnetic ribbon 40 laminated in the direction along the second axis Z with respect to the inductor wiring 30. be. Therefore, in the present embodiment, the magnetic ribbon 40 in the first portion P1 and the magnetic ribbon 40 in the third portion P3 are laminated in the direction along the second axis Z with respect to the inductor wiring 30. be.
  • the magnetic ribbon 40 located closest to the first wiring end IP1 and the first magnetic ribbon 40 of the plurality of magnetic ribbons 40 of the third portion P3 are located closest to the first wiring end IP1.
  • Each of the magnetic ribbons 40 positioned closest to the wiring end IP1 is the first magnetic ribbon 41 .
  • the magnetic ribbon 40 located closest to the second wiring end IP2 and of the plurality of magnetic ribbons 40 of the third portion P3, the second Each of the magnetic ribbons 40 positioned closest to the wiring end IP2 is the second magnetic ribbon 42 .
  • the end in the first positive direction X1 is the first end, and the end in the first negative direction X2 is the second end.
  • the range excluding both ends of one magnetic strip 40 in the direction along the first axis X is defined as a predetermined range AR11.
  • the first virtual straight line VL1 When the first virtual straight line VL1 extending in the direction along the second axis Z is drawn through the first wiring end IP1 of the inductor wiring 30, the first virtual straight line VL1 passes through the predetermined range AR11 of the first magnetic ribbon 41. ing. Specifically, the first imaginary straight line VL1 passes through the center of the first magnetic ribbon 41 in the direction along the first axis X or near the center thereof.
  • the second virtual straight line VL2 extending in the direction along the second axis Z is drawn through the second end MP12 of the first magnetic ribbon 41, the second virtual straight line VL2 passes through the inductor wiring 30. Specifically, the second virtual straight line VL2 passes through approximately the center of the inductor wiring 30 in the direction along the first axis X. As shown in FIG.
  • the third virtual straight line VL3 extending in the direction along the second axis Z is drawn through the second wiring end IP2 of the inductor wiring 30, the third virtual straight line VL3 passes through the predetermined range AR11 of the second magnetic ribbon 42. ing. Specifically, the third imaginary straight line VL3 passes through the center of the second magnetic ribbon 42 in the direction along the first axis X or near the center thereof.
  • the fourth virtual straight line VL4 extending in the direction along the second axis Z is drawn through the first end MP21 of the second magnetic ribbon 42, the fourth virtual straight line VL4 passes through the inductor wiring 30. Specifically, the fourth virtual straight line VL4 passes through approximately the center of the inductor wiring 30 in the direction along the first axis X. As shown in FIG.
  • a method for manufacturing inductor component 10 will be described.
  • a copper foil preparation step for preparing a copper foil 81 is performed. Since the copper foil 81 constitutes the inductor wiring 30 , the thickness of the copper foil 81 is prepared to have a thickness necessary for the inductor wiring 30 .
  • the copper foil 81 is arranged such that the two main surfaces of the copper foil 81 are orthogonal to the second axis Z, and a cross section orthogonal to the central axis CA is shown. do.
  • a first covering step is performed to cover areas other than the area occupied by 40 .
  • the first covering portion 82 is formed to cover areas other than the area occupied by the plurality of magnetic strips 40 in the second portion P2.
  • the entire surface of the copper foil 81 facing the second negative direction Z2 is coated with a photosensitive dry film resist.
  • the dry film resist is cured by exposing the portion where the first covering portion 82 is to be formed.
  • the dry film resist is similarly applied to the surface of the copper foil 81 facing the second positive direction Z1, and the portion forming the first covering portion 82 is exposed to light to cure the dry film resist. .
  • the uncured portion of the applied dry film resist is peeled off with a chemical solution.
  • the hardened portion of the applied dry film resist is formed as the first covering portion 82 .
  • a copper foil etching step is performed to etch the copper foil 81 exposed from the first covering portion 82 .
  • the exposed copper foil 81 is removed.
  • a first covering portion removing step for removing the first covering portion 82 is performed. Specifically, the first covering portion 82 is peeled off by wet etching the first covering portion 82 with a chemical.
  • a second covering step is performed to cover the range occupied by the plurality of magnetic ribbons 40 when viewed from the direction along the second axis Z of both surfaces of the copper foil 81 orthogonal to the second axis Z.
  • a dry film resist R is applied to the entire surface of the copper foil 81 facing the second positive direction Z1.
  • the magnetic ribbon 40 and the non-magnetic layer are formed by photolithography when viewed from the direction along the second axis Z among the surfaces of the copper foil 81 facing the second positive direction Z1.
  • a second covering portion 83 covering the area other than the area occupied by 50 is formed.
  • a layered body preparation step is performed to prepare a layered body 84 in which the magnetic ribbon 40 and the non-magnetic layer 50 are layered.
  • a laminate 84 in which the magnetic ribbon 40 and the non-magnetic layer 50 are laminated is prepared.
  • a ribbon is prepared as the magnetic ribbon 40 .
  • a ribbon containing a magnetic material in an amorphous state is prepared as the ribbon.
  • the ribbon is made of Metglas (registered trademark), FINEMET (registered trademark), FeSiB, FeSiBCr, etc. manufactured by Hitachi Metals, Ltd., for example. This strip is cut into 10 mm squares.
  • a non-magnetic material is applied to the cut ribbon by spin coating.
  • the non-magnetic material is, for example, epoxy resin varnish.
  • the cut strip is laminated on the coated non-magnetic material. After alternately laminating the thin strips and the non-magnetic material in this manner, the thin strips and the non-magnetic material are hardened and adhered by a vacuum heating and pressurizing device. Then, by dicing into a desired size, a laminated body 84 in which a plurality of magnetic ribbons 40 and nonmagnetic layers 50 are laminated can be prepared.
  • the laminate 84 includes a first laminate 84A that forms the magnetic ribbon 40 and the non-magnetic layer 50 in the first portion P1 and the third portion P3, and a magnetic ribbon 40 and the non-magnetic layer 50 in the second portion P2. Two types are prepared, namely, the second laminate 84B that constitutes the magnetic layer 50 .
  • thermoplastic adhesive 85 is indicated by thick lines in FIGS. 13-18.
  • the whole is inverted in the direction along the second axis Z.
  • the second laminate 84B constituting the magnetic ribbon 40 and the non-magnetic layer 50 in the second portion P2 is aligned with the second positive direction Z1 of the first laminate 84A. is arranged on a portion not in contact with the copper foil 81 of the surface facing the .
  • the second laminate 84B can be arranged by pressing the laminate 84 into the opening of the copper foil 81 by pressing or the like.
  • the first laminate 84A constituting the magnetic ribbon 40 and the non-magnetic layer 50 in the first portion P1 is placed along the second positive direction Z1 of the copper foil 81. Temporarily adhered to the facing surface and the surface facing the second positive direction Z1 of the second laminate 84B with a thermoplastic adhesive 85 . Thereby, the laminated body 84 is arranged.
  • a pressing process is performed. Pressing is performed in a state in which the whole is covered with a resin material 86 that is a non-magnetic material. Thereby, each layer in the direction along the second axis Z is crimped.
  • a singulation process is performed. Specifically, for example, it is separated into pieces by dicing along the break lines DL.
  • the portion between the first laminates 84A arranged in the direction along the first axis X in the second covering portion 83 described above becomes the non-magnetic portion 60.
  • portions of the second covering portion 83 between the first laminates 84A and between the second laminates 84B arranged in the direction along the central axis CA serve as the non-magnetic portions 60 .
  • the thermoplastic adhesive 85 remains on both surfaces of the inductor wiring 30 in the direction along the second axis Z as part of the non-magnetic layer 50 . Note that in the example shown in FIG.
  • the laminate 84 is cut along the end face in the first positive direction X1 and the end face in the first negative direction X2.
  • the non-magnetic film 70 made of a non-magnetic material is applied to the end faces of the laminate 84 in the first positive direction X1 and the end faces in the first negative direction X2.
  • the thermoplastic adhesive 85 also wraps around the side surfaces of the inductor wiring 30 facing the first positive direction X1 and the side surfaces facing the first negative direction X2. Insulation is ensured without contact.
  • the software used is Femtet 2019 manufactured by Murata Software.
  • the solver is static magnetic field analysis.
  • the model is three dimensional.
  • a standard mesh size is 0.25 mm.
  • a magnetic material BH curve that satisfies B Bs ⁇ tanh ( ⁇ 0 ⁇ r ⁇ H/Bs) was used.
  • a portion where the relative permeability ⁇ r is 1 or more is used so as not to fall below the magnetic permeability of the vacuum, and the function of Femtet2019 is used to extrapolate the magnetic permeability of the vacuum.
  • the dimension along the first axis X is 1 mm
  • the dimension along the second axis Z is 0.1 mm
  • the dimension along the central axis CA is 2.4 mm.
  • the material of the inductor wiring 30 is Cu.
  • the magnetic thin ribbon 40 is an amorphous metal magnetic thin film made of Fe, Si, Cr, and B.
  • the relative magnetic permeability ⁇ r is 7000 and the saturation magnetic flux density Bs is 1.3T.
  • the electrical conductivity is 0.568181818MS/m.
  • the dimension along the first axis X is 0.99 mm
  • the dimension along the second axis Z is 0.02 mm
  • the dimension along the central axis CA is 0.99 mm.
  • the dimension between the magnetic ribbons 40 adjacent to each other in the direction along the first axis X is changed between 0.006 mm and 0.1 mm.
  • the dimension between the magnetic ribbons 40 adjacent to each other in the direction along the second axis Z is 0.002 mm.
  • the dimension between the magnetic ribbons 40 adjacent to each other in the direction along the central axis CA is 0.02 mm.
  • a non-magnetic layer having a thickness of 0.01 mm was provided on both end surfaces of the base body 20 in the direction along the central axis CA.
  • two magnetic ribbons 40 are aligned in the direction along the first axis X, and two magnetic ribbons 40 are aligned in the direction along the central axis CA. In the direction along the second axis Z, 41 magnetic strips 40 are arranged.
  • a non-magnetic gap for electrical insulation is provided between the inductor wiring 30 and the magnetic ribbon 40 adjacent to the inductor wiring 30 .
  • the dimension of the base body 20 along the central axis CA is 2.02 mm. That is, the dimension of the element body 20 along the central axis CA is smaller than the dimension of the inductor wiring 30 along the central axis CA by 0.38 mm. Therefore, the simulation is performed with the inductor wiring 30 projecting 0.19 mm from the end face of the element body 20 in the positive direction Y1 and the inductor wiring 30 projecting 0.19 mm from the end face of the element body 20 in the negative direction Y2.
  • a sinusoidal electric signal is input to the inductor wiring 30 of such an inductor component.
  • the amplitude of the electrical signal is 2.25 A and the frequency of the electrical signal is 300 kHz.
  • the simulation results are shown in FIG. In FIG. 19, the horizontal axis is the first axis interval, and the vertical axis is the inductance acquisition efficiency.
  • the first axial distance is the dimension between the magnetic strips 40 adjacent to each other in the direction along the first axis X, and the unit of the first axial distance is " ⁇ m”.
  • the inductance acquisition efficiency is a value obtained by dividing the inductance by the eddy current loss, and the unit of the inductance acquisition efficiency is "nH/mW".
  • the wider the first axis interval the higher the inductance acquisition efficiency.
  • the dimension of the magnetic ribbon 40 in the direction along the first axis X is 0.99 mm.
  • the line of the first approximation formula F1 representing the relationship between the first axial spacing and the inductance acquisition efficiency when the first axial spacing is less than 10 ⁇ m is represented by a chain line in FIG.
  • the dashed line in FIG. 19 represents the line of the second approximation formula F2 that indicates the relationship between the first axial spacing and the inductance acquisition efficiency when the first axial spacing is 10 ⁇ m or more.
  • Both the first approximate expression F1 and the second approximate expression F2 are logarithmic functions.
  • the slope of the logarithmic function in the first approximate expression F1 is 0.0956, while the slope of the logarithmic function in the second approximate expression F2 is 1.0867. That is, the amount of change in the inductance acquisition efficiency due to an increase in the first axis spacing varies greatly between when the first axis spacing is less than 10 ⁇ m and when the first axis spacing is 10 ⁇ m or more.
  • the inductance acquisition efficiency is the value obtained by dividing the inductance by the eddy current loss, as described above. Further, in the above simulation, the number of magnetic strips 40 included in the element body 20 is the same. Therefore, it is presumed that the change in eddy current loss of inductor component 10 is greater than the change in inductance of inductor component 10 even if the first axial distance is varied. In other words, the fact that the inductance acquisition efficiency is increased by widening the first axial distance means that the eddy current loss of the inductor component 10 becomes smaller as the first axial distance becomes wider.
  • the dimension of the inductor wiring 30 in the direction along the first axis X is 1 mm. Therefore, when the first axial interval is 10 ⁇ m or more, it can be said that the first axial interval is 1.01% or more of the dimension of the inductor wiring 30 in the direction along the first axis X. That is, when the first axial spacing is 1.01% or more of the dimension of the inductor wiring 30 along the first axis X, the first axial spacing is It can be said that the amount of increase in the inductance acquisition efficiency with respect to the increase in the first axial distance is large compared to the case where the distance is less than 1.01% with respect to the dimension.
  • the dimension of the magnetic ribbon 40 in the direction along the first axis X is made larger than the dimension in the direction along the second axis Z of the magnetic ribbon 40 . Further, the plurality of magnetic ribbons 40 are arranged in the direction along the first axis X, and the plurality of magnetic ribbons 40 are arranged in the direction along the second axis Z. As shown in FIG. Between the magnetic ribbons 40 adjacent to each other in the direction along the first axis X, there is a portion where the interval dimension of the magnetic ribbons 40 is 1.01% or more of the first dimension average value. make it As a result, an increase in eddy current loss of inductor component 10 can be suppressed.
  • a magnetic ribbon made of a magnetic material in an amorphous state is called an amorphous magnetic ribbon
  • a magnetic ribbon made of a crystallized magnetic material such as nanocrystals is called a crystallized magnetic ribbon.
  • the electrical resistance of the amorphous magnetic ribbon is greater than that of the crystallized magnetic ribbon.
  • all the magnetic ribbons 40 are amorphous magnetic ribbons.
  • the eddy current generated in the magnetic ribbon 40 can be reduced as compared with the case where the magnetic ribbon 40 is a crystallized magnetic ribbon. Therefore, an increase in eddy current loss of inductor component 10 can be suppressed.
  • a plurality of magnetic strips 40 are arranged in the direction along the third axis.
  • a plurality of magnetic strips 40 are also arranged in the direction along the fourth axis. Therefore, an increase in the area of the main surface MF of one magnetic ribbon 40 can be suppressed. As a result, it is possible to suppress an increase in the eddy current generated in each magnetic ribbon 40 . Therefore, an increase in eddy current loss of inductor component 10 can be suppressed.
  • the first virtual straight line VL1 passes through the predetermined range AR11 of the first magnetic ribbon 41. Therefore, of the magnetic flux generated when a current flows through the inductor wiring 30, most of the magnetic flux in the direction along the first imaginary straight line VL1 in the vicinity of the first wiring end IP1 of the inductor wiring 30 is the first magnetic ribbon 41 except for the end in the direction along the first axis X. That is, of the magnetic flux generated when the current flows through the inductor wiring 30, the magnetic flux passing through the ends in the direction along the first magnetic ribbon 41 is reduced. Therefore, it is possible to suppress the disturbance of the magnetic flux and the local concentration of the magnetic flux. According to such a positional relationship between the first magnetic ribbon 41 and the inductor wiring 30, the characteristic index can be increased regardless of the filling rate of the magnetic material.
  • the characteristic index here is, for example, (L ⁇ Isat) ⁇ (L/Rdc).
  • L is the inductance of inductor component 10 .
  • Isat is the current value when the inductance L is reduced by 20% from the initial inductance L at 0.001 A, and is also called DC superposition characteristic.
  • Rdc is the electrical resistance of the inductor wiring 30 to the DC current, that is, the DC wiring resistance.
  • the second virtual straight line VL2 passes through the predetermined range AR11 of the second magnetic ribbon 42. Therefore, of the magnetic flux generated when a current flows through the inductor wiring 30, most of the magnetic flux in the direction along the second virtual straight line VL2 near the second wiring end IP2 of the inductor wiring 30 is generated by the second magnetic ribbon. 42 except for the end in the direction along the first axis X. That is, of the magnetic flux generated when the current flows through the inductor wiring 30, the magnetic flux passing through the ends in the direction along the second magnetic ribbon 42 is reduced. Therefore, it is possible to suppress the disturbance of the magnetic flux and the local concentration of the magnetic flux. According to such a positional relationship between the second magnetic ribbon 42 and the inductor wiring 30, the characteristic index is increased regardless of the filling rate of the magnetic material.
  • the first side of the virtual rectangle VR drawn in the cross section perpendicular to the central axis CA is along the first axis X
  • the second side of the virtual rectangle VR is along the second axis Z.
  • the first side is longer than the second side.
  • the dimensions of the plurality of magnetic ribbons 40 in the direction along the second axis Z are all equal.
  • the magnetic flux density in each magnetic strip 40 is made uniform, and the magnetic flux is hard to concentrate and saturate at a specific location.
  • the magnetic flux density of the entire element body 20 is improved.
  • the shape of the base body 20 is not limited to the example of the above embodiment.
  • it when viewed from the direction along the second axis Z, it may have a rectangular shape, or may have a polygonal shape other than a quadrangle.
  • the shape of the element body 20 may be circular or elliptical when viewed from the direction along the second axis Z. As shown in FIG. Moreover, the shape of the element body 20 may be a cube.
  • the shape of the base body 20 may be a rectangular parallelepiped having different dimensions in the direction along the third axis and the dimension in the direction along the fourth axis, or may be a polygonal column, a cylinder, or the like. may
  • the shape of the inductor wiring 30 can be appropriately changed as long as the inductor wiring 30 can give inductance L to the inductor component 10 by generating a magnetic flux in the magnetic ribbon 40 when a current flows.
  • the inductor wiring 130 is elliptical in the cross section perpendicular to the central axis CA. Then, a hypothetical rectangle VR2 with a minimum area, which circumscribes the inductor wiring 130 and has a first side along the first axis X and a second side along the second axis Z, is drawn. At this time, the first side of the virtual rectangle VR2 is longer than the second side of the virtual rectangle VR2. In this way, if the long side of the virtual rectangle VR2 is parallel to the first axis, the diamagnetic field of the first magnetic ribbon 41 is generated at the end of the wiring cross section in the direction along the first axis X where the magnetic flux is more concentrated. is more preferable because it corresponds to a region with a small .
  • the shape of the inductor wiring 30 in the cross section orthogonal to the central axis CA may be such that the second side along the second axis Z is longer than the first side along the first axis X. Even in this case, the magnetic flux concentrates on the first wiring end IP1, which is the end of the inductor wiring 30 in the first positive direction X1. Therefore, the region of the first magnetic ribbon 41 having a small demagnetizing field corresponds to the first wiring end IP1 of the wiring cross section where the magnetic flux is more concentrated, which is more preferable.
  • the shape of the inductor wiring 30 may be a shape that does not have symmetry such as linear symmetry or rotational symmetry, such as when it includes one or more projecting portions. In this way, if the symmetry is broken in the cross section perpendicular to the central axis CA, there will be a place where the magnetic flux concentrates more than others. Then, it is preferable to determine the positional relationship of the first magnetic ribbon 41 so that the first wiring end IP1 is a portion such as a projecting portion where the magnetic flux concentrates more than others.
  • the shape of the inductor wiring 30 may be square or circular.
  • the virtual rectangle VR drawn in the cross section perpendicular to the central axis CA is a square, and the first side of the virtual rectangle VR does not have to be longer than the second side of the virtual rectangle VR.
  • the first magnetic ribbon 41 is determined in accordance with the shape of the inductor wiring in the cross section perpendicular to the central axis CA.
  • the distance along the second axis Z from the first wiring end IP1 is the shortest among the magnetic ribbons 40 laminated in the direction along the second axis Z with respect to the inductor wiring 130.
  • the magnetic ribbon 40 is one of the magnetic ribbons 40 included in the second portion P2. Even in this case, it is sufficient that the first virtual straight line VL1 passes through the predetermined range AR11 of the first magnetic ribbon 41.
  • the position of the inductor wiring 30 in the direction along the first axis X is not limited to the example of the above embodiment. It is sufficient that the position of the first wiring end IP1 of the inductor wiring 30 in the direction along the first axis X is within the predetermined range AR11 of the first magnetic ribbon 41 .
  • the first wiring end IP1 may be separated from the center of the first magnetic ribbon 41 in the direction along the first axis X.
  • the first virtual straight line VL1 passes through the predetermined range AR11 of the magnetic ribbon 40 different from the first magnetic ribbon 41, the first virtual straight line VL1 passes through the predetermined range AR11 of the first magnetic ribbon 41. VL1 may not pass through.
  • the first imaginary straight line VL1 does not have to pass through the predetermined range AR11 in any of the plurality of magnetic strips 40 forming the element body 20 .
  • the position of the second wiring end IP2 of the inductor wiring 30 in the direction along the first axis X should be within the predetermined range AR11 of the second magnetic ribbon 42 .
  • the second wiring end IP2 may be separated from the center of the second magnetic ribbon 42 in the direction along the first axis X.
  • the second virtual straight line VL2 passes through the predetermined range AR11 of the magnetic ribbon 40 different from the second magnetic ribbon 42, the second virtual straight line VL2 passes through the predetermined range AR11 of the second magnetic ribbon 42. VL2 may not pass.
  • the second imaginary straight line VL2 does not have to pass through the predetermined range AR11 in any of the plurality of magnetic ribbons 40 forming the element body 20 .
  • the shape of the inductor wiring 30 is not limited to a linear shape. It only needs to extend along the main surface MF of the magnetic thin strip 40, and may have, for example, a curved shape as a whole or a meandering shape. When the inductor wiring 30 extends on the same plane, it is easy to adjust the arrangement of the first wiring end IP1 of the inductor wiring 30 and the first magnetic ribbon 41 . In this case, the direction along the first axis X may change depending on the position at which the element body 20 is cut.
  • the inductor wiring 30 may have not only a straight portion extending along the third axis, but also a straight portion extending along the fourth axis. Further, the inductor wiring 30 may be connected to a lead wiring extending in a direction intersecting the main surface MF, a via wiring extending in a direction along the second axis Z, or the like. Furthermore, a plurality of inductor wirings 30 may be connected to via wirings extending in the direction along the second axis Z, and may have a three-dimensional spiral shape such as a spiral shape or a helical shape as a whole. In this case, the inductor wiring 30 is the portion extending along the main surface MF of the magnetic ribbon 40 .
  • the material of the inductor wiring 30 is not limited to the example of the above embodiment as long as it is a conductive material.
  • the material of the inductor wiring 30 may be a conductive resin.
  • the central axis CA and the third axis may not coincide.
  • the first axis X does not have to match the fourth axis.
  • the central axis CA extends in a meandering shape.
  • the third axis should be orthogonal to the second axis Z
  • the fourth axis should be orthogonal to the second axis Z and intersect the third axis.
  • the magnetic ribbons 40 are aligned along the second axis Z.
  • the area of the magnetic ribbon 40 when viewed from the direction along the second axis Z is smaller than when there is one at the same position along the second axis Z. Therefore, the eddy current generated in one magnetic strip 40 is reduced.
  • the positional relationship between the first imaginary straight line VL1 passing through the first wiring end IP1 and the predetermined range AR11 of the first magnetic ribbon 41 described in the above embodiment is determined by: It suffices if it is satisfied in any one cross section. In other words, the positional relationship between the first virtual straight line VL1 and the predetermined range AR11 of the first magnetic ribbon 41 does not have to be satisfied in all areas of the inductor wiring 30 . If the above positional relationship is satisfied in at least one cross section, the effects of the above embodiment can be obtained at that cross section.
  • the positional relationship between the second virtual straight line VL2 passing through the second wiring end IP2 described in the above embodiment and the predetermined range AR11 of the second magnetic ribbon 42 is determined by: It suffices if it is satisfied in any one cross section. In other words, the positional relationship between the second virtual straight line VL2 and the predetermined range AR11 of the second magnetic strip 42 does not have to be satisfied in the entire region of the inductor wiring 30 . If the above positional relationship is satisfied in at least one cross section, the effects of the above embodiment can be obtained at that cross section.
  • An external electrode may be connected to the portion where the inductor wiring 30 is exposed from the element body 20 .
  • external electrodes may be formed on both end surfaces of the inductor wiring 30 in the direction along the central axis CA and both end surfaces of the element body 20 in the direction along the central axis CA by coating, printing, plating, or the like.
  • the direction in which the magnetic ribbon 40 and the non-magnetic layer 50 are laminated may not be orthogonal to the central axis CA and the first axis X due to manufacturing errors.
  • the fact that the magnetic ribbons 40 and the like are "laminated in the direction along the second axis Z" allows for such manufacturing errors.
  • the number of magnetic strips 40 stacked in the direction along the second axis Z should be two or more.
  • the inductor wiring 30 and the non-magnetic layer 50 should be arranged between the two magnetic ribbons 40 .
  • the material of the non-magnetic layer 50 is not limited to the examples of the above embodiments as long as it is a non-magnetic material.
  • the non-magnetic layer 50 may be made of resin other than acrylic resin, epoxy resin, or silicone resin, may be made of non-magnetic ceramics such as alumina, silica, or glass, or may be made of non-magnetic inorganic materials containing these. or a mixture thereof.
  • the materials of the nonmagnetic layer 50, the nonmagnetic portion 60, and the nonmagnetic film 70 may be different from each other, or may be partially different, as long as they are nonmagnetic materials.
  • the nonmagnetic layer 50, the nonmagnetic portion 60, and the nonmagnetic film 70 may be integrated or may be separate members.
  • the non-magnetic layer 50 may be hollow, or may be composed of an insulating oxide film obtained by oxidizing the surface of the magnetic ribbon 40 .
  • the non-magnetic layer 50 may be omitted.
  • the magnetic ribbons 40 adjacent to each other in the direction along the second axis Z may be in direct contact with each other.
  • the non-magnetic portion 60 may be omitted.
  • the magnetic ribbons 40 aligned in the direction along the third axis or the fourth axis may be in direct contact with each other.
  • the nonmagnetic portion 60 may exist between the inductor wiring 30 and the magnetic ribbon 40 . In this case, the nonmagnetic portion 60 can ensure insulation between the inductor wiring 30 and the magnetic ribbon 40 .
  • a plurality of magnetic ribbons 40 are laminated and "a plurality of magnetic ribbons 40 are lined up” specifically mean that the adjacent magnetic ribbons 40 are completely or partially insulated from each other. It refers to the case where there is a physical boundary on a microscopic scale. For example, it does not include a state in which the magnetic strips 40 are sintered and completely integrated.
  • the first magnetic ribbon 41 does not have to exist in the third portion P3. Conversely, if the first magnetic ribbon 41 exists in the third portion P3, the first magnetic ribbon 41 may not exist in the third portion P3.
  • the second magnetic ribbon 42 does not have to exist in the third portion P3. Conversely, if the second magnetic ribbon 42 exists in the third portion P3, the second magnetic ribbon 42 may not exist in the second portion P2.
  • two magnetic ribbons 40 are arranged in the direction along the first axis X at the same position along the second axis Z, and are arranged in the direction along the central axis CA, that is, the third axis. 2 are lined up. That is, when “M” and “N” are positive integers, "M” magnetic ribbons 40 are arranged in the same position along the second axis Z in the direction along the third axis. "N" pieces are arranged in the direction along the first axis X, that is, the fourth axis, and both "M" and “N” are two.
  • M which is the number of first magnetic ribbons 41 arranged in the direction along the fourth axis
  • N which is the number of magnetic ribbons 40 arranged in the direction along the central axis CA
  • M and N are 2 or more, the area of each magnetic ribbon 40 as viewed from the second axis Z can be reduced, so loss due to eddy currents can be reduced. Easy to make small.
  • the magnetic ribbon 40 is not limited to being made of an amorphous magnetic material, and the magnetic ribbon 40 may be made of a magnetic material different from the magnetic materials described in the above embodiments. - The magnetic material forming the magnetic ribbon 40 does not have to be a metallic magnetic material.
  • some of the magnetic ribbons 40 may be amorphous magnetic ribbons, and the remaining magnetic ribbons 40 may not be amorphous magnetic ribbons. good.
  • At least one of all the magnetic strips 40 forming the element body 20 may be a sintered body.
  • at least one magnetic ribbon 40 may be a sintered body of a magnetic material.
  • the second portion P2 does not have to be provided with the magnetic ribbons 40.
  • a composite portion made of insulating resin containing magnetic powder may be provided in the first positive direction X1 of the inductor wiring 30 .
  • a composite portion made of insulating resin containing magnetic powder may be provided in the first negative direction X2 of the inductor wiring 30 .
  • the first shaft train of the third portion P3 may not satisfy the relationship represented by the above relational expression (formula 2). Conversely, if at least one of the plurality of first shaft rows of the third portion P3 satisfies the relationship represented by the above relational expression (Equation 2), the first shaft row of the first portion P1 The relationship expressed by the relational expression (Equation 1) does not have to be satisfied in the axle row.
  • the dimensions of the plurality of magnetic ribbons 40 in the direction along the second axis Z may be different. If the dimension of the magnetic ribbon 40 in the direction along the second axis Z is small, a manufacturing error of about 20% may occur depending on the manufacturing method. Therefore, if the dimension of the magnetic ribbons 40 in the direction along the second axis Z is 80% or more and 120% or less of the average value of the dimensions in the direction along the second axis Z of the plurality of magnetic ribbons 40, , can be regarded as approximately equal.
  • the dimension of one magnetic strip 40 in the direction along the second axis Z is the The smallest dimension in the direction.
  • the dimension of the plurality of magnetic ribbons 40 in the direction along the second axis Z is the second dimension of one magnetic ribbon 40 measured by an electron microscope using a single image in which five or more magnetic ribbons 40 fit. It is the average value of the dimensions along the Z axis.
  • the dimensions of the plurality of magnetic ribbons 40 in the direction along the second axis Z may not all be the same. They may vary from each other, or may vary by more than 20% from the average value.
  • the distance between a pair of magnetic ribbons 40 adjacent to each other in the direction along the second axis Z may be different. For example, if the dimension of the nonmagnetic layer 50 along the second axis Z is small, a manufacturing error of about 20% may occur depending on the manufacturing method. Further, for example, as in the modified example described above, part of the non-magnetic layer 50 may become hollow, so that the gap between a pair of magnetic ribbons 40 adjacent to each other in the direction along the second axis Z may vary. . A gap may also exist between the non-magnetic layer 50 and the magnetic ribbon 40 .
  • the distance between a pair of magnetic ribbons 40 adjacent in the direction along the second axis Z is the sum of the lengths of the nonmagnetic layer 50 and the gap. Therefore, the interval between one pair of magnetic ribbons 40 adjacent in the direction along the second axis Z is , 80% or more and 120% or less, they can be regarded as substantially equal.
  • the interval between a pair of magnetic ribbons 40 adjacent in the direction along the second axis Z is the second Let it be the smallest dimension in the direction along the Z axis.
  • the average value of the spacing between multiple sets of magnetic ribbons 40 adjacent in the direction along the second axis Z is 5 sets measured from one image in which six or more magnetic ribbons 40 are fitted with an electron microscope. is the average value of the spacing between the magnetic strips 40 of .
  • the dimensions of the plurality of non-magnetic layers 50 in the direction along the second axis Z may not be the same, and may vary by more than 20% from the average value.
  • the number and positions of the non-magnetic portions 60 are not limited to those in the above embodiment. The number and positions of the non-magnetic portions 60 may be changed according to the number and positions of the magnetic strips 40 in the direction along the first axis X and in the direction along the central axis CA. Also, the size of the non-magnetic portion 60 may be appropriately changed according to the interval between the magnetic ribbons 40 at the same position in the direction along the second axis Z. FIG.
  • the non-magnetic film 70 may be omitted.
  • the X-axis And the dimension in the direction along the central axis CA may be set small.
  • the non-magnetic film 70 can be formed by the resin material 86 entering the gap between the second covering portion 83 and the laminate 84 .
  • the method of manufacturing the inductor component 10 is not limited to the example of the above embodiment.
  • the element body 20 may be laminated in the direction along the second axis Z to form a plurality of sheets, and the plurality of sheets may be laminated.
  • the base body 20 may be formed by

Abstract

La présente invention concerne un composant inducteur (10) dans lequel les augmentations de la perte de courant de foucault au niveau du courant de temps s'écoulent vers le câblage d'inducteur (30) sont supprimées sans s'appuyer sur le taux de remplissage d'un matériau magnétique dans un élément (20). Le composant inducteur (10) comprend : un élément (20) comprenant une pluralité de bandes minces magnétiques en forme de plaque plate (40) comprenant un matériau magnétique ; et un câblage d'inducteur (30). La pluralité de bandes minces magnétiques (40) sont disposées en couches dans l'élément (20) dans une direction orthogonale à une surface principale (MF) des bandes minces magnétiques (40). Une rangée (40) des bandes minces magnétiques (40) est formée dans l'élément (20) par agencement de la pluralité de bandes minces magnétiques (40) dans une direction le long d'un premier axe. Lorsque la valeur moyenne de la taille minimale de la pluralité de bandes minces magnétiques (40) dans la rangée dans la direction le long du premier axe est désignée comme étant une première valeur moyenne de taille, une partie dans laquelle la taille minimale est de 1,01 % ou plus de la première valeur moyenne de taille est présente entre des bandes minces magnétiques (40) adjacentes dans la direction le long du premier axe.
PCT/JP2022/003069 2021-02-26 2022-01-27 Composant inducteur WO2022181183A1 (fr)

Applications Claiming Priority (2)

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JP2021030985 2021-02-26
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WO2012147341A1 (fr) * 2011-04-25 2012-11-01 株式会社 東芝 Feuille magnétique, et dispositif de réception de puissance sans contact, instrument électronique, et dispositif de charge sans contact employant celui-ci

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012147341A1 (fr) * 2011-04-25 2012-11-01 株式会社 東芝 Feuille magnétique, et dispositif de réception de puissance sans contact, instrument électronique, et dispositif de charge sans contact employant celui-ci

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