WO2016035862A1 - Bobine d'inductance à montage en surface et son procédé de fabrication - Google Patents

Bobine d'inductance à montage en surface et son procédé de fabrication Download PDF

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Publication number
WO2016035862A1
WO2016035862A1 PCT/JP2015/075103 JP2015075103W WO2016035862A1 WO 2016035862 A1 WO2016035862 A1 WO 2016035862A1 JP 2015075103 W JP2015075103 W JP 2015075103W WO 2016035862 A1 WO2016035862 A1 WO 2016035862A1
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WO
WIPO (PCT)
Prior art keywords
coil
molded body
conducting wire
winding
mount inductor
Prior art date
Application number
PCT/JP2015/075103
Other languages
English (en)
Japanese (ja)
Inventor
千寿 境
緑川　智樹
昌明 戸塚
佐々森　邦夫
Original Assignee
東光株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東光株式会社 filed Critical 東光株式会社
Publication of WO2016035862A1 publication Critical patent/WO2016035862A1/fr

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    • 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
    • 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
    • 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
    • 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
    • H01F41/10—Connecting leads to windings

Definitions

  • the present invention relates to a surface-mount inductor including a coil formed by winding a conductive wire, and a molded body that is formed using a sealing material including a resin and a magnetic material and incorporates the coil, and a manufacturing method thereof.
  • a coil 41 is formed on a conventional surface-mount inductor by winding a conducting wire having a flat cross section, and the coil 41 is formed of a sealing material containing magnetic powder and resin.
  • the coil 41 is embedded in and connected to an external terminal 43 formed on the surface of the molded body 42 (see, for example, JP 2010-245473 A).
  • a coil 41 formed by winding a conducting wire is placed on a tablet formed in a shape having a columnar convex portion on a flat peripheral edge portion with a sealing material containing magnetic powder and resin, and the coil
  • the drawer end of the coil 41 is sandwiched between the inner wall surface of the molding die and the outer side surface of the columnar convex portion of the tablet in a state where the drawer end portion of 41 is aligned with the outer side surface of the columnar convex portion of the tablet.
  • the coil 41 and the tablet are placed in a molding die, and a molded body 42 containing the coil 41 is formed by using this die by a compression molding method or a powder molding method.
  • An object of one or more embodiments of the present invention is to provide a surface-mount inductor and a method for manufacturing the same that can reduce the variation in resistance value while reducing the thickness.
  • a surface mount inductor including a coil formed by winding a conducting wire and a sealing material including a resin and a magnetic material, and including a molded body incorporating the coil. Is formed by winding a conducting wire having a circular cross section, and the lead-out end of the coil is formed by crushing the lead, the major diameter of the lead-out end is 1.5 times the diameter of the lead, and the lead-out end of the coil Are exposed on the surface of the molded body so that the major axis direction is parallel to the end face of the molded body.
  • a surface mount inductor including a coil formed by winding a conducting wire and a sealing material including a resin and a magnetic material, and a molded body incorporating the coil.
  • the coil is formed by winding a conducting wire whose cross section is a square, the leading end of the coil is formed by crushing the conducting wire, the major diameter of the leading end is 1.5 times the thickness of the conducting wire, The leading end is exposed on the surface of the molded body so that the major axis direction is parallel to the end surface of the molded body.
  • a surface mount inductor including a coil formed by winding a conductive wire and a sealing material including a resin and a magnetic material, and including a molded body incorporating the coil.
  • the coil is formed by winding a rectangular conductive wire having a vertical / horizontal ratio of 1: 2 or less in cross section, and the lead end of the coil is formed by crushing the lead, and the major axis of the lead end is 1 of the thickness of the lead. .5 times or more, and the lead-out end portion of the coil is exposed on the end surface of the molded body so that the major axis direction thereof is parallel to the end surface of the molded body.
  • a surface mount inductor including a coil formed by winding a conductive wire and a sealing material including a resin and a magnetic material, and a molded body incorporating the coil
  • a step of winding a conducting wire to form a coil a step of crushing the leading end of the coil so that its major axis is 1.5 times or more the thickness of the conducting wire, A step of embedding the coil in the molded body so as to be exposed in parallel with the end face of the molded body.
  • a surface mount inductor including a coil formed by winding a conducting wire and a sealing material including a resin and a magnetic material, and including a molded body incorporating the coil. Is formed by winding a conducting wire having a circular cross section, and the lead-out end of the coil is formed by crushing the lead, the major diameter of the lead-out end is 1.5 times the diameter of the lead, and the lead-out end of the coil Is exposed on the surface of the molded body so that the major axis direction thereof is parallel to the end surface of the molded body, so that the shape can be reduced and the variation in resistance value can be reduced.
  • a surface mount inductor including a coil formed by winding a conducting wire and a sealing material including a resin and a magnetic material, and a molded body incorporating the coil.
  • the coil is formed by winding a conducting wire whose cross section is a square, the leading end of the coil is formed by crushing the conducting wire, the major diameter of the leading end is 1.5 times the thickness of the conducting wire, Since the leading end portion is exposed on the surface of the molded body so that the major axis direction thereof is parallel to the end surface of the molded body, the shape can be reduced and the variation in resistance value can be reduced.
  • a surface mount inductor including a coil formed by winding a conductive wire and a sealing material including a resin and a magnetic material, and including a molded body incorporating the coil.
  • the coil is formed by winding a rectangular conductive wire having a vertical / horizontal ratio of 1: 2 or less in cross section, and the lead end of the coil is formed by crushing the lead, and the major axis of the lead end is 1 of the thickness of the lead. .5 times or more, and the coil drawing end is exposed on the end face of the molded body so that its major axis direction is parallel to the end face of the molded body, so that the shape can be made thin and the variation in resistance value is reduced. can do.
  • a surface mount inductor including a coil formed by winding a conductive wire and a sealing material including a resin and a magnetic material, and a molded body incorporating the coil
  • a step of winding a conducting wire to form a coil a step of crushing the leading end of the coil so that its major axis is 1.5 times or more the thickness of the conducting wire, Since the coil is embedded in the molded body so as to be exposed in parallel with the end surface of the molded body, the shape can be reduced and the variation in resistance value can be reduced.
  • One or more embodiments of the present invention include a coil formed by winding a conductive wire, a sealing material including a resin and a magnetic material, and a molded body that incorporates the coil.
  • the coil is formed by winding a conductive wire having a circular cross section, or formed by winding a conductive wire having a square cross section, or by winding a flat conductive wire having a cross-sectional ratio of 1: 2 or less. Or formed.
  • the leading end of the coil is formed by crushing so that the major axis of the leading end is 1.5 times the thickness of the conducting wire. And the drawer
  • FIG. 1 is a cross-sectional view showing a first embodiment of a surface-mount inductor according to the present invention.
  • 11 is a coil and 12 is a molded body.
  • the coil 11 has a winding section 11A in which a conductor having a circular cross section and a surface covered with an insulator is wound in two outer and outer windings in a spiral shape so that both ends thereof are positioned on the outer periphery.
  • An air-core coil is formed that includes a pair of lead-out end portions 11B that are drawn from the turn portion 11A and face each other with the winding portion 11A interposed therebetween.
  • the lead-out end portion 11B is formed by crushing so that the major axis A2 has 1.5 times or more the diameter A1 of the conducting wire of the portion constituting the winding portion 11A.
  • the molded body 12 is formed so as to incorporate the coil 11 using a sealing material containing a resin and a magnetic material.
  • a sealing material for example, an iron-based metal magnetic powder is used as a magnetic material, and an epoxy resin is used as a resin, and a mixture thereof is used.
  • the surface of the lead-out end portion 11B of the coil 11 is exposed at the end surface of the molded body 12.
  • the leading end portion 11 ⁇ / b> B of the coil 11 is exposed on the surface of the molded body 12 such that the major axis direction thereof is parallel to the end surface of the molded body 12.
  • a pair of external terminals 13 are formed on the surface of the molded body 12. Then, the coil 11 is connected between the pair of external terminals 13 by connecting the leading end portion 11 ⁇ / b> B of the coil 11 exposed at the end face of the molded body 12 to the external terminal 13.
  • Such a surface mount inductor is manufactured as follows. First, after forming a winding part 11A by winding a conductive wire having a circular cross section and having a surface covered with an insulator in a spiral shape so that both ends thereof are positioned on the outer periphery and wound in two outer and outer windings, Both ends of the conducting wire are drawn out from the outer periphery of the winding part 11A so as to face each other with the winding part 11A interposed therebetween, and a lead-out end part 11B is formed to form the air core coil 11. Next, the lead-out end portion 11B of the coil 11 is crushed so that the major axis A2 has 1.5 times or more the diameter A1 of the conducting wire of the portion constituting the winding portion 11A.
  • a molded body 12 containing the coil 11 is formed by a compression molding method or a compacting method using a sealing material including a resin and a magnetic material.
  • the coil 11 is embedded in the molded body 12 so that the major axis direction of the lead-out end portion 11B is exposed in parallel with the end surface of the molded body.
  • the molded body 12 formed in this way is subjected to a treatment for peeling off the insulating film on the lead-out end portion 11B of the coil 11 exposed on the end face and a barrel polishing treatment. The process of peeling off the insulating coating and the barrel polishing process can be performed simultaneously.
  • the external terminal 13 is formed in the surface of this molded object 12, and the drawer
  • FIG. 2 is a cross-sectional view showing a second embodiment of the surface mount inductor of the present invention.
  • the coil 21 has a winding section 21A in which a conductor having a square cross section and a surface covered with an insulator is wound in two spiral outer windings so that both ends thereof are positioned on the outer periphery.
  • An air-core coil that is drawn out from the turn part 21A and includes a pair of lead-out end parts 21B facing each other with the winding part 21A interposed therebetween is formed.
  • the leading end portion 21B is formed by crushing so that the major axis B2 is 1.5 times or more the thickness B1 of the conductive wire of the portion constituting the winding portion 21A.
  • the molded body 22 is formed so as to incorporate the coil 21 using a sealing material including a resin and a magnetic material.
  • a sealing material including a resin and a magnetic material.
  • an iron-based metal magnetic powder is used as a magnetic material
  • an epoxy resin is used as a resin, and a mixture thereof is used.
  • the surface of the lead-out end portion 21B of the coil 21 is exposed at the end surface of the molded body 22.
  • the leading end portion 21 ⁇ / b> B of the coil 21 is exposed on the surface of the molded body 22 such that the major axis direction thereof is parallel to the end surface of the molded body 22.
  • a pair of external terminals 23 are formed on the surface of the molded body 22.
  • the coil 21 is connected between the pair of external terminals 23 by connecting the drawn end portions 21 ⁇ / b> B of the coils 21 exposed at the end surfaces of the molded body 22 to the external terminals 23.
  • Such a surface mount inductor is manufactured as follows. First, after forming a winding part 21A by winding a conductive wire whose cross section is a square and whose surface is coated with an insulator in a spiral shape so that both ends thereof are located on the outer periphery, and wound in two outer and outer windings, The coil 21 is formed by pulling out both ends of the conducting wire from the outer periphery of the winding portion 21A so as to face each other with the winding portion 21A interposed therebetween, thereby forming a lead-out end portion 21B. Next, the leading end portion 21B of the coil 21 is crushed so that the major axis B2 is 1.5 times or more the conductor thickness B1 of the portion constituting the winding portion 21A.
  • a molded body 22 containing the coil 21 is formed by a compression molding method or a compacting method using a sealing material containing a resin and a magnetic material.
  • the coil 21 is embedded in the molded body 22 so that the major axis direction of the lead-out end portion 21B is exposed in parallel with the end surface of the molded body.
  • the molded body 22 formed in this way is subjected to a treatment for peeling off the insulating coating on the lead-out end portion 21B of the coil 21 exposed on the end face and a barrel polishing treatment. The process of peeling off the insulating coating and the barrel polishing process can be performed simultaneously.
  • External terminals 23 are formed on the surface of the molded body 22, and the lead-out end 21 ⁇ / b> B of the coil 21 and the external terminals 23 are connected.
  • FIG. 3 is a sectional view showing a third embodiment of the surface mount inductor of the present invention.
  • the coil 31 includes a winding portion 31A in which a flat rectangular conductor wire whose surface is coated with an insulator is wound in two outer and outer windings in a spiral shape so that both ends thereof are positioned on the outer periphery, and a winding portion 31A.
  • an air-core coil having a pair of lead-out end portions 31B facing each other with the winding portion 31A interposed therebetween is formed.
  • the ratio of the length and width (thickness and width) is 1: 2 or less, and the horizontal direction of the cross section of the conductor, that is, the width direction of the conductor Is wound in two stages of outer and outer windings in a spiral shape in a state of being parallel to the winding axis to form a winding portion 31A.
  • the lead-out end 31B is formed by crushing so that the major axis C2 is 1.5 times or more the width C1 of the conductor in the width direction of the portion constituting the winding part 31A.
  • the molded body 32 is formed so as to incorporate the coil 31 using a sealing material including a resin and a magnetic material.
  • an iron-based metal magnetic powder is used as a magnetic material, and an epoxy resin is used as a resin, and a mixture thereof is used.
  • the surface of the lead-out end portion 31B of the coil 31 is exposed on the end surface of the molded body 32 so that the major axis direction thereof is parallel to the end surface of the molded body 32.
  • a pair of external terminals 33 are formed on the surface of the molded body 32. The coil 31 is connected between the pair of external terminals 33 by connecting the lead end portions 31 ⁇ / b> B of the coils 31 exposed at the end surfaces of the molded body 32 to the external terminals 33.
  • Such a surface mount inductor is manufactured as follows. First, the horizontal direction of the cross section of the conducting wire is such that the ratio of the length and width (thickness and width) of the cross section is 1: 2 or less, and the rectangular conductor wire whose surface is coated with an insulator is positioned at both ends thereof. That is, after forming the winding part 31A wound in a two-stage outer and outer winding in a spiral shape with the width direction of the conducting wire parallel to the winding axis, both ends of the conducting wire are respectively wound from the outer periphery of the winding part 31A.
  • the coil 31 is formed by forming the lead-out end 31B by pulling out so as to face each other across 31A.
  • a molded body 32 containing the coil 31 is formed by a compression molding method or a compacting method using a sealing material including a resin and a magnetic material.
  • the coil 31 is embedded in the molded body 32 such that the major axis direction of the lead-out end portion 31B is exposed in parallel with the end surface of the molded body.
  • the molded body 32 formed in this way is subjected to a treatment for peeling off the insulating coating on the lead-out end portion 31B of the coil 31 exposed on the end face and a barrel polishing treatment. The process of peeling off the insulating coating and the barrel polishing process can be performed simultaneously.
  • the external terminal 33 is formed on the surface of the molded body 32, and the lead-out end 31B of the coil 31 and the external terminal 33 are connected.
  • the sealing material used was an iron-based metal magnetic powder as the magnetic material, and an epoxy resin as the resin.
  • the magnetic material was a metal magnetic powder of another composition, and its surface was coated with an insulator such as glass.
  • Metal magnetic powder, surface-modified metal magnetic powder, ferrite powder, and the like may be used.
  • a thermosetting resin such as a polyimide resin or a phenol resin, or a thermoplastic resin such as a polyethylene resin or a polyamide resin may be used.
  • both ends of the conducting wire are drawn out from the outer periphery of the winding part so as to face each other with the winding part sandwiched therebetween, and the drawing end part is formed, but both ends of the conducting wire are drawn out from the same side of the outer periphery of the winding part.
  • a drawer end may be formed.

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

Abstract

　Lorsque la forme d'une bobine est simplement amincie, la largeur de ligne du fil conducteur sera plus petite, et la zone d'exposition d'une partie d'extrémité de tirage de la bobine exposée sur la surface d'un corps moulé sera réduite. Dans un tel cas, il y a une diminution de la zone de la jonction entre la partie d'extrémité de tirage de la bobine et une borne externe, et une augmentation de la variation dans la valeur de résistance. Selon la présente invention, une bobine formée par enroulement d'un fil conducteur, et un matériau d'étanchéité contenant une résine et un matériau magnétique sont utilisés, l'invention comprenant un corps moulé incorporant la bobine. La bobine est formée par enroulement d'un film conducteur ayant une section transversale circulaire, d'un fil conducteur ayant une section transversale carrée, ou d'un fil conducteur ayant une section transversale rectangulaire ayant un rapport horizontal-vertical de 1:2 ou moins. La partie d'extrémité de tirage de la bobine est formée en aplatissant le fil conducteur de telle sorte que le diamètre long est au moins 1,5 fois le diamètre du fil conducteur. La partie d'extrémité de tirage de la bobine est présentée sur la surface d'extrémité du corps moulé de telle sorte que la direction de diamètre long est parallèle à la surface d'extrémité du corps moulé.
PCT/JP2015/075103 2014-09-05 2015-09-03 Bobine d'inductance à montage en surface et son procédé de fabrication WO2016035862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014180929A JP2016058419A (ja) 2014-09-05 2014-09-05 表面実装インダクタ及びその製造方法
JP2014-180929 2014-09-05

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WO2016035862A1 true WO2016035862A1 (fr) 2016-03-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105895307A (zh) * 2016-06-08 2016-08-24 苏州达方电子有限公司 表面粘着式电感及其制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7247942B2 (ja) * 2020-04-14 2023-03-29 株式会社村田製作所 インダクタおよびその製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005191403A (ja) * 2003-12-26 2005-07-14 Matsushita Electric Ind Co Ltd コイル部品
JP2007258584A (ja) * 2006-03-24 2007-10-04 Tdk Corp コイルの端子相当部潰し装置及びコイルの端子相当部潰し方法
JP2009123927A (ja) * 2007-11-15 2009-06-04 Taiyo Yuden Co Ltd インダクタ及びその製造方法
JP2010245473A (ja) * 2009-04-10 2010-10-28 Toko Inc 表面実装インダクタの製造方法とその表面実装インダクタ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5974283B2 (ja) * 2012-07-06 2016-08-23 パナソニックＩｐマネジメント株式会社 インダクタの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005191403A (ja) * 2003-12-26 2005-07-14 Matsushita Electric Ind Co Ltd コイル部品
JP2007258584A (ja) * 2006-03-24 2007-10-04 Tdk Corp コイルの端子相当部潰し装置及びコイルの端子相当部潰し方法
JP2009123927A (ja) * 2007-11-15 2009-06-04 Taiyo Yuden Co Ltd インダクタ及びその製造方法
JP2010245473A (ja) * 2009-04-10 2010-10-28 Toko Inc 表面実装インダクタの製造方法とその表面実装インダクタ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105895307A (zh) * 2016-06-08 2016-08-24 苏州达方电子有限公司 表面粘着式电感及其制造方法

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