WO2024135042A1 - コイル部品及びその製造方法、並びに、コイル部品を備える回路モジュール - Google Patents

コイル部品及びその製造方法、並びに、コイル部品を備える回路モジュール Download PDF

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Publication number
WO2024135042A1
WO2024135042A1 PCT/JP2023/036478 JP2023036478W WO2024135042A1 WO 2024135042 A1 WO2024135042 A1 WO 2024135042A1 JP 2023036478 W JP2023036478 W JP 2023036478W WO 2024135042 A1 WO2024135042 A1 WO 2024135042A1
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WIPO (PCT)
Prior art keywords
coil component
conductor
holes
main surface
pin
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Ceased
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PCT/JP2023/036478
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English (en)
French (fr)
Japanese (ja)
Inventor
和弘 吉川
啓吾 東田
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TDK Corp
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TDK Corp
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Priority to CN202380086971.XA priority Critical patent/CN120418897A/zh
Priority to JP2024565616A priority patent/JPWO2024135042A1/ja
Publication of WO2024135042A1 publication Critical patent/WO2024135042A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • Patent document 1 discloses a coil component in which metal columnar members are placed in holes provided in a magnetic sheet.
  • the coil component in Patent Document 1 uses cylindrical metal columnar members.
  • This disclosure describes a coil component having a conductor pin with an improved shape and a manufacturing method thereof, as well as a circuit module including such a coil component.
  • a coil component includes an element body having first and second main surfaces located opposite each other and having a plurality of through holes penetrating from the first main surface to the second main surface, a plurality of conductor pins inserted into the plurality of through holes, and a protective member that embeds the space between the inner peripheral wall of the through holes and the outer peripheral wall of the conductor pin, the outer peripheral wall of the conductor pin having a protrusion embedded in the protective member, and the protrusion is provided near a first end located on the first main surface side of the conductor pin and near a second end located on the second main surface side of the conductor pin.
  • a method for manufacturing a coil component includes the steps of preparing an element having first and second main surfaces located opposite each other, forming a plurality of through holes in the element extending from the first main surface to the second main surface, inserting a conductor pin into each of the plurality of through holes, embedding a protective member between the inner peripheral wall of the through hole and the outer peripheral wall of the conductor pin, polishing the first and second main surfaces of the element until both ends of the conductor pin are exposed, and continuing polishing until both ends of the conductor pin are deformed.
  • the present disclosure provides a coil component having a conductor pin with an improved shape and a manufacturing method thereof, as well as technology that can realize a circuit module including such a coil component.
  • FIG. 1 is a schematic perspective view showing the appearance of a coil component 100 according to a first embodiment of the technique disclosed herein.
  • 2(a) is a schematic cross-sectional view taken along line AA shown in FIG. 1
  • FIG. 2(b) is a schematic cross-sectional view taken along line BB shown in FIG.
  • FIG. 3 is an enlarged view for explaining the structure of the vicinity of an end portion in the Z direction of the conductor pin 31 included in the coil component 100.
  • FIG. 4 is an enlarged view for explaining the structure of the vicinity of the end portion in the Z direction of the conductive pin 31 according to the first modified example.
  • FIG. 5 is an enlarged view for explaining the structure of the vicinity of the end portion in the Z direction of the conductive pin 31 according to the second modified example.
  • FIG. 6 is a process diagram for explaining the method of manufacturing the coil component 100.
  • FIG. 7 is a process diagram for explaining the method of manufacturing the coil component 100.
  • FIG. 8 is a process diagram for explaining the method of manufacturing the coil component 100.
  • FIG. 9 is a process diagram for explaining the method of manufacturing the coil component 100.
  • FIG. 10 is a process diagram for explaining the manufacturing method of the coil component 100.
  • FIG. 11 is a process diagram for explaining the method of manufacturing the coil component 100.
  • FIG. 13 is a schematic cross-sectional view for explaining the structure of a coil component 200 according to a second embodiment of the technique disclosed herein.
  • FIG. 13 is a schematic cross-sectional view for explaining the structure of a coil component 200 according to a second
  • FIG. 14 is an enlarged view for explaining the structure of the vicinity of the end portion in the Z direction of the conductor pin 31 included in the coil component 200.
  • FIG. 15 is a schematic cross-sectional view for explaining the structure of a coil component 300 according to a third embodiment of the technique disclosed herein.
  • FIG. 16 is a schematic cross-sectional view for explaining the structure of a coil component 400 according to a fourth embodiment of the technique disclosed herein.
  • FIG. 17 is a schematic cross-sectional view for explaining the structure of a coil component 500 according to a fifth embodiment of the technique disclosed herein.
  • FIG. 18 is a schematic cross-sectional view for explaining the structure of a coil component 600 according to a sixth embodiment of the technique disclosed herein.
  • FIG. 19 is a schematic cross-sectional view for explaining the structure of a coil component 700 according to a seventh embodiment of the technique disclosed herein.
  • FIG. 1 is a schematic perspective view showing the appearance of a coil component 100 according to a first embodiment of the technique disclosed herein.
  • Fig. 2(a) is a schematic cross-sectional view taken along line A-A shown in Fig. 1
  • Fig. 2(b) is a schematic cross-sectional view taken along line B-B shown in Fig. 1.
  • the coil component 100 has an element body 10 having through holes 21-24, and conductor pins 31-34 inserted into the through holes 21-24, respectively.
  • the element body 10 may be made of a composite magnetic material in which magnetic particles made of a high magnetic permeability material such as ferrite or permalloy are bound by a resin binder.
  • the element body 10 has main surfaces 11 and 12 that form an XY plane and are located opposite each other, and the through holes 21-24 are provided so as to penetrate the element body 10 from the main surface 11 to the main surface 12.
  • Through holes 21 and 22 are arranged in the X direction, and their positions in the Y direction are the same.
  • Through holes 23 and 24 are arranged in the X direction, and their positions in the Y direction are the same.
  • the positions of through holes 21, 22 in the Y direction and the positions of through holes 23, 24 in the Y direction are different from each other.
  • the positions of through holes 21 to 24 in the X direction are different from each other.
  • the positional relationship of the conductor pins 31 to 34 is the same as that of the through holes 21 to 24.
  • the conductor pins 31 to 34 are columnar members made of a good conductor such as Cu, and are conductive members formed into a pin shape in advance, separately from the processing of the element body 10. Therefore, they are different from those formed by electrolytic plating or the like when the element body 10 is processed. By using such conductor pins 31 to 34, even if the aspect ratio of the through holes 21 to 24 is high, long-term electrolytic plating is not required and voids are not generated.
  • the diameter of the conductor pins 31 to 34 is smaller than the diameter of the through holes 21 to 24, and thus a gap is formed between the inner wall of the through holes 21 to 24 and the outer wall of the conductor pins 31 to 34. As shown in FIG. 2, this gap is filled with a protective member 60 made of an insulating material such as resin. This prevents the conductor pins 31 to 34 from falling off. Furthermore, even if the insulation of the element body 10 is insufficient, contact between the conductor pins 31 to 34 and the element body 10 is prevented, so insulation between the two can be ensured.
  • the conductor pins 31 to 34 may be cylindrical or prismatic.
  • the main surface 11 of the element body 10 is covered with an insulating film 70, and the main surface 12 of the element body 10 is covered with an insulating film 80.
  • Both insulating films 70, 80 are made of resin or the like.
  • Openings 71-74 are provided in the insulating film 70 at positions overlapping with the conductor pins 31-34 in a plan view from the Z direction. As a result, one end of the conductor pins 31-34 in the Z direction is exposed at the openings 71-74.
  • openings 81-84 are provided in the insulating film 80 at positions overlapping with the conductor pins 31-34 in a plan view from the Z direction. As a result, the other end of the conductor pins 31-34 in the Z direction is exposed at the openings 81-84.
  • Connection patterns 51, 53 extending in the X direction are provided on the surface of the insulating film 70.
  • One end of the connection pattern 51 overlaps with the opening 71, and the other end of the connection pattern 51 overlaps with the opening 72.
  • one end of the conductor pin 31 and one end of the conductor pin 32 are connected via the connection pattern 51.
  • one end of the connection pattern 53 overlaps with the opening 73, and the other end of the connection pattern 53 overlaps with the opening 74.
  • one end of the conductor pin 33 and one end of the conductor pin 34 are connected via the connection pattern 53.
  • External terminals 41, 42 and a connection pattern 52 are provided on the surface of the insulating film 80.
  • the external terminal 41 is disposed at one end of the ion implantation body 10 in the X direction overlapping the opening 81.
  • the external terminal 42 is disposed at the other end of the ion implantation body 10 in the X direction overlapping the opening 84.
  • the connection pattern 52 extends diagonally with respect to the X direction, with one end overlapping the opening 82 and the other end overlapping the opening 83.
  • the other end of the conductor pin 32 and the other end of the conductor pin 33 are connected via the connection pattern 52.
  • the four conductor pins 31-34 are connected in series between the external terminals 41 and 42, and function as a two-terminal coil.
  • the inductance of the coil component 100 is determined mainly by the length of the conductor pins 31-34, but the inductance can also be adjusted by the length of the connection patterns 51-53.
  • the current flowing through the conductor pins 31 to 34 is folded back in the Z direction, causing magnetic fields to reinforce each other inside the element body 10.
  • the current direction in the conductor pin 31 and the current direction in the conductor pin 32 are opposite to each other, so the magnetic fields generated by the conductor pins 31 and 32 reinforce each other, thereby increasing the inductance.
  • the positions of the conductor pins 31 to 34 in the X direction are all different, and the conductor pins 31 and 34 located at both ends in the X direction are connected to the external terminals 41 and 42, respectively, so that it is possible to ensure a sufficient area for the external terminals 41 and 42 without causing interference with the conductor pins 32 and 33.
  • Figure 3 is an enlarged view to explain the structure near the end of the conductor pin 31 in the Z direction.
  • the diameter ⁇ 31 of the conductor pin 31 is smaller than the diameter ⁇ 21 of the through hole 21, and the gap between the two is filled with the protective member 60.
  • the diameter of the conductor pin 31 is not constant in the Z direction, and the diameter is enlarged near the end in the Z direction. This enlargement of the diameter is brought about by the protrusion A provided on the outer peripheral wall of the conductor pin 31.
  • the presence of the protrusion A makes the diameter ⁇ A of the end of the conductor pin 31 in the Z direction larger than the diameter ⁇ 31.
  • This protrusion A is embedded in the protective member 60, and as a result, the adhesion between the conductor pin 31 and the protective member 60 is improved.
  • the protrusion A is not in contact with the element body 10, but if the element body 10 has a certain degree of insulation, the protrusion A may be in contact with the element body 10.
  • the diameter ⁇ 71 of the opening 71 provided in the insulating film 70 is smaller than the diameter ⁇ 31 of the conductor pin 31, and the conductor pin 31 is exposed over the entire surface of the opening 71. This makes it possible to prevent contact between the connection pattern 51 and the element body 10 even if the opening 71 is misaligned.
  • the diameter ⁇ 71 of the opening 71 may be larger than the diameter ⁇ 31 of the conductor pin 31, but even in this case, if the diameter ⁇ 71 of the opening 71 is smaller than the diameter ⁇ 21 of the through hole 21, contact between the connection pattern 51 and the element body 10 can be prevented.
  • the diameter ⁇ 71 of the opening 71 is approximately the same as the diameter ⁇ 21 of the through hole 21, if there is a slight misalignment in the formation position of the opening 71, the connection pattern 51 will come into contact with the element body 10, but this can be prevented in this embodiment.
  • the diameter of the conductor pin 31 is enlarged at the end in the Z direction, so even if the formation position of the opening 71 is shifted, it is possible to ensure a sufficient contact area between the connection pattern 51 and the conductor pin 31.
  • protrusion A is present around the entire outer wall of conductor pin 31, but as in the modified example shown in FIG. 4, protrusion A may be present only on a portion of the outer wall of conductor pin 31. Also, as in the modified example shown in FIG. 5, not only may protrusion A be present at the end of conductor pin 31, but another protrusion B may be present in an intermediate section that is not at the end of conductor pin 31. Protrusion B is also embedded in protective member 60, which further enhances the adhesion between conductor pin 31 and protective member 60.
  • FIGS. 6 to 11 are process diagrams for explaining the manufacturing method of the coil component 100 according to this embodiment.
  • FIGS. 6 to 11 correspond to the A-A cross section shown in FIG. 1.
  • a base body 10 made of a composite magnetic material or the like is prepared, and through holes 21-24 are formed by drilling or the like.
  • the main surface 12 of the base body 10 is covered with a support 90, and the conductor pins 31-34 are inserted into the through holes 21-24.
  • the length of the conductor pins 31-34 may be shorter than the thickness of the base body 10.
  • a protective member 60 is formed from the main surface 11 side of the base body 10, and the entire body is pressurized using water pressure or the like to fill the inside of the through holes 21-24 with the protective member 60. As a result, the protective member 60 is embedded between the inner peripheral walls of the through holes 21-24 and the outer peripheral walls of the conductor pins 31-34.
  • the main surfaces 11, 12 of the element body 10 are polished until both ends of the conductor pins 31 to 34 are exposed.
  • polishing is performed under conditions that make it easy for both ends of the conductor pins 31 to 34 to deform, and polishing is continued until both ends of the conductor pins 31 to 34 are sufficiently deformed.
  • both ends of the conductor pins 31 to 34 are clearly deformed, and protrusions A embedded in the protective member 60 are formed.
  • insulating films 70 and 80 are formed on the main surfaces 11 and 12 of the element body 10, respectively, and then openings 71 to 74 are formed in the insulating film 70, and openings 81 to 84 are formed in the insulating film 80.
  • both ends of the conductor pins 31 to 34 are deformed by polishing and their diameters are enlarged, so that a sufficient margin is ensured for the formation positions of the openings 71 to 74 and 81 to 84.
  • a seed layer (not shown) is formed on the surfaces of the insulating films 70 and 80 by electroless plating, and then resists 91 and 92 are formed on the surfaces of the insulating films 70 and 80, respectively, as shown in FIG. 11.
  • the resists 91 and 92 are peeled off and the seed layer is etched, whereby the external terminals 41 and 42 and the connection patterns 51 to 53 are formed, and the coil component 100 according to this embodiment shown in FIG. 1 is completed.
  • polishing is performed under conditions that make both ends of the conductor pins 31-34 easily deformed, and polishing is continued until both ends of the conductor pins 31-34 are deformed, making it possible to form protrusions A at both ends of the conductor pins 31-34.
  • the coil component 100 thus fabricated can be mounted on the mounting area 100A on the substrate 110 shown in FIG. 12 to form a circuit module 120.
  • Land patterns 111 and 112 are provided on the surface of the substrate 110, and the coil component 100 is mounted on the substrate 110 so that the external terminals 41 and 42 are connected to the land patterns 111 and 112, respectively.
  • Fig. 13 is a schematic cross-sectional view for explaining the structure of a coil component 200 according to a second embodiment of the technique disclosed herein, where Fig. 13(a) corresponds to the cross-section shown in Fig. 2(a), and Fig. 13(b) corresponds to the cross-section shown in Fig. 2(b).
  • the coil component 200 according to the second embodiment differs from the coil component 100 according to the first embodiment in that the outer peripheral walls of the conductor pins 31 to 34 are covered with a protective film 61.
  • the rest of the basic configuration is the same as that of the coil component 100 according to the first embodiment, so the same elements are given the same reference numerals and duplicated explanations are omitted.
  • the protective film 61 is made of an insulating material and is coated in advance on the outer peripheral walls of the conductor pins 31 to 34. By using such conductor pins 31 to 34, it is possible to further improve the insulation against the base body 10. Furthermore, in this embodiment, since the conductor pins 31 to 34 are covered with the protective film 61, it is also possible to use a material that does not have sufficiently high insulation properties as the material for the protective member 60. As an example, a resin material containing a filler made of a magnetic material such as ferrite or permalloy may be used for the protective member 60. This makes it possible to further increase the inductance of the coil component 200.
  • the protrusion A may break through the protective film 61.
  • the protective film 61 may be formed on the outer peripheral wall of the conductor pins 31-34 except for both ends.
  • a part of the protrusion A contacts the protective member 60 without the protective film 61.
  • such a structure is obtained by polishing the conductor pins 31-34 under conditions that make both ends of the conductor pins 31-34 easily deformed, and continuing the polishing until both ends of the conductor pins 31-34 are deformed.
  • the protrusion A on the conductor pins 31-34 having the protective film 61 without performing special processing on the conductor pins 31-34 before insertion into the through holes 21-24.
  • the protective film 61 may be formed on almost the entire outer peripheral wall of the conductor pins 31-34, including both ends. In the case of the embodiment shown in FIG. 14(b), it is possible to further improve the insulation against the element body 10.
  • Fig. 15 is a schematic cross-sectional view for explaining the structure of a coil component 300 according to a third embodiment of the technique disclosed herein, where Fig. 15(a) corresponds to the cross-section shown in Fig. 2(a), and Fig. 15(b) corresponds to the cross-section shown in Fig. 2(b).
  • the coil component 300 according to the third embodiment differs from the coil component 100 according to the first embodiment in that the diameters ⁇ 21, ⁇ 24 of the through holes 21, 24 are larger than the diameters ⁇ 22, ⁇ 23 of the through holes 22, 23, and the diameters ⁇ 31, ⁇ 34 of the conductor pins 31, 34 are larger than the diameters ⁇ 32, ⁇ 33 of the conductor pins 32, 33. Since the other basic configurations are the same as those of the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations are omitted.
  • the diameters ⁇ 31, ⁇ 34 of the conductor pins 31, 34 are larger than the diameters ⁇ 32, ⁇ 33 of the conductor pins 32, 33, and as a result, the cross-sectional area of the conductor pins 31, 34 is larger than the cross-sectional area of the conductor pins 32, 33, increasing the strength of the conductor pins 31, 34. Therefore, even if an external force is applied via the external terminals 41, 42, the conductor pins 31, 34 are less likely to fall off or be damaged. In addition, since the cross-sectional area of the conductor pins 32, 33 is smaller than that of the conductor pins 31, 34, it is possible to ensure sufficient volume for the element body 10.
  • Fig. 16 is a schematic cross-sectional view for explaining the structure of a coil component 400 according to a fourth embodiment of the technique disclosed herein, where Fig. 16(a) corresponds to the cross-section shown in Fig. 2(a), and Fig. 16(b) corresponds to the cross-section shown in Fig. 2(b).
  • the coil component 400 according to the fourth embodiment differs from the coil component 100 according to the first embodiment in that the diameter of the through holes 21-24 increases from the main surface 11 toward the main surface 12 of the element body 10, and the diameter of the conductor pins 31-34 increases from the main surface 11 toward the main surface 12 of the element body 10.
  • the rest of the basic configuration is the same as that of the coil component 100 according to the first embodiment, so the same elements are given the same reference numerals and redundant explanations will be omitted.
  • the diameter of the conductor pins 31 to 34 on the main surface 12 side on which the external terminals 41, 42 are formed is enlarged, so that the external force applied through the external terminals 41, 42 is dispersed, making the conductor pins 31 to 34 less likely to fall off or be damaged.
  • the conductor pins 31 to 34 have the same shape, there is no need to use multiple different types of conductor pins.
  • the conductor pins 31 to 34 can be inserted from the main surface 12 side of the element body 10 in the opposite direction to that shown in Figure 7.
  • Fig. 17 is a schematic cross-sectional view for explaining the structure of a coil component 500 according to a fifth embodiment of the technique disclosed herein, where Fig. 17(a) corresponds to the cross-section shown in Fig. 2(a), and Fig. 17(b) corresponds to the cross-section shown in Fig. 2(b).
  • the coil component 500 according to the fifth embodiment differs from the coil component 100 according to the first embodiment in that the central axes of the through holes 21 to 24 are inclined with respect to the Z direction.
  • the rest of the basic configuration is the same as that of the coil component 100 according to the first embodiment, so the same elements are given the same reference numerals and redundant explanations are omitted.
  • the central axes of the through holes 21-24 are inclined with respect to the Z direction
  • the central axes of the conductor pins 31-34 inserted into the through holes 21-24 are also inclined with respect to the Z direction.
  • the diameters of the through holes 21-24 may be enlarged so that the central axes of the conductor pins 31-34 are inclined inside the through holes 21-24. In this case, the direction of inclination of the conductor pins 31-34 can be controlled by the polishing conditions.
  • Fig. 18 is a schematic cross-sectional view for explaining the structure of a coil component 600 according to a sixth embodiment of the technique disclosed herein, where Fig. 18(a) corresponds to the cross section shown in Fig. 2(a), and Fig. 18(b) corresponds to the cross section shown in Fig. 2(b).
  • the coil component 600 according to the sixth embodiment differs from the coil component 100 according to the first embodiment in that the conductor pins 31 to 34 are curved.
  • the rest of the basic configuration is the same as that of the coil component 100 according to the first embodiment, so the same elements are given the same reference numerals and duplicated explanations are omitted.
  • the conductor pins 31-34 are curved rather than straight, so the length of the conductor pins 31-34 is greater than the height of the element body 10 in the Z direction, making it possible to increase inductance. Furthermore, by using conductor pins 31-34 that are curved in advance, inductance can be increased regardless of control based on polishing conditions, etc.
  • Fig. 19 is a schematic cross-sectional view for explaining the structure of a coil device 700 according to a seventh embodiment of the technique disclosed herein, where Fig. 19(a) corresponds to the cross section shown in Fig. 2(a), and Fig. 19(b) corresponds to the cross section shown in Fig. 2(b).
  • the coil component 700 according to the seventh embodiment differs from the coil component 100 according to the first embodiment in the positions at which the openings 71 to 74 are formed.
  • the rest of the basic configuration is the same as that of the coil component 100 according to the first embodiment, so the same elements are given the same reference numerals and duplicated explanations are omitted.
  • the positions of the openings 71 and 72 are offset outward from the center of the through holes 21 and 22 so that the distance between the openings 71 and 72 in the X direction increases, and the positions of the openings 73 and 74 are offset outward from the center of the through holes 23 and 24 so that the distance between the openings 73 and 74 in the X direction increases.
  • This increases the electrical length of the connection patterns 51 and 53, so that the inductance is finely adjusted to increase.
  • the positions of the openings 71 and 72 may be offset inward from the center of the through holes 21 and 22 so that the distance between the openings 71 and 72 in the X direction decreases, and the positions of the openings 73 and 74 may be offset inward from the center of the through holes 23 and 24 so that the distance between the openings 73 and 74 in the X direction decreases.
  • the electrical length of the connection patterns 51 and 53 is shortened, so that the inductance is finely adjusted to decrease.
  • the inductance can be fine-tuned by adjusting the distance between the openings 82 and 83. Furthermore, the inductance can be fine-tuned by adjusting the size of the openings 71-74 and 81-84.
  • a coil component includes an element body having first and second main surfaces located opposite each other and having a plurality of through holes penetrating from the first main surface to the second main surface, a plurality of conductor pins inserted into the plurality of through holes, respectively, and a protective member that embeds between the inner peripheral wall of the through holes and the outer peripheral wall of the conductor pin, the outer peripheral wall of the conductor pin having a protrusion embedded in the protective member, the protrusion being provided near a first end located on the first main surface side of the conductor pin and near a second end located on the second main surface side of the conductor pin.
  • the outer peripheral wall of the conductor pin is covered with a protective film, and the protrusion may have a portion that contacts the protective member without going through the protective film. This can improve the insulation between the conductor pin and the base body.
  • the protective member may contain a magnetic material. This makes it possible to further increase the inductance.
  • the coil component may further include first and third connection patterns provided on the first main surface of the element body and a second connection pattern provided on the second main surface of the element body, the plurality of through holes including first, second, third and fourth through holes, the plurality of conductor pins including first, second, third and fourth conductor pins inserted into the first, second, third and fourth through holes, respectively, the first end of the first conductor pin and the first end of the second conductor pin may be connected via the first connection pattern, the second end of the second conductor pin and the second end of the third conductor pin may be connected via the second connection pattern, and the first end of the third conductor pin and the first end of the fourth conductor pin may be connected via the third connection pattern. This allows the first to fourth conductor pins to be connected in series.
  • the coil component may further include a first insulating film covering the first main surface of the element body, the first connection pattern being connected to the first and second conductor pins, respectively, through first and second openings provided in the first insulating film, and the third connection pattern being connected to the third and fourth conductor pins, respectively, through third and fourth openings provided in the first insulating film. This makes it possible to ensure insulation between the first and third connection patterns and the element body.
  • the diameters of the first, second, third and fourth openings may be smaller than the diameters of the first, second, third and fourth through holes, respectively. This makes it possible to ensure insulation between the first and third connection patterns and the element body even if there is a deviation in the formation positions of the first to fourth openings.
  • the diameters of the first, second, third, and fourth openings may be smaller than the diameters of the first, second, third, and fourth conductor pins, respectively. This makes it possible to ensure the contact areas between the first and third connection patterns and the first to fourth conductor pins even if there is a deviation in the formation positions of the first to fourth openings.
  • the positions at which the first and second openings are formed may be offset from the centers of the first and second through holes. This allows fine adjustment of the inductance.
  • the coil component may further include first and second external terminals provided on the second main surface of the element body, with the second end of the first conductor pin being connected to the first external terminal and the second end of the fourth conductor pin being connected to the second external terminal. This makes it possible to connect the first to fourth conductor pins in series between the first and second external terminals.
  • the coil component may further include a second insulating film covering the second main surface of the element body, the first external terminal being connected to the first conductor pin through a fifth opening provided in the second insulating film, and the second external terminal being connected to the fourth conductor pin through a sixth opening provided in the second insulating film. This makes it possible to ensure insulation between the first and second external terminals and the element body.
  • the cross-sectional areas of the first and fourth conductor pins may be larger than the cross-sectional areas of the second and third conductor pins. This makes it less likely that the first and fourth conductor pins will fall off or be damaged, even if an external force is applied via the first and second external terminals.
  • a circuit module includes a substrate having first and second land patterns, and the above-mentioned coil component mounted on the substrate, with the first and second external terminals connected to the first and second land patterns, respectively. This makes it possible to provide a circuit module in which a highly reliable coil component is surface-mounted.
  • a method for manufacturing a coil component includes the steps of preparing an element having first and second main surfaces located opposite each other, forming a plurality of through holes penetrating the element from the first main surface to the second main surface, inserting a conductor pin into each of the plurality of through holes, embedding a protective member between the inner peripheral wall of the through hole and the outer peripheral wall of the conductor pin, polishing the first and second main surfaces of the element until both ends of the conductor pin are exposed, and continuing polishing until both ends of the conductor pin are deformed. This makes it possible to easily form a protrusion on the outer peripheral wall of the conductor pin.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
PCT/JP2023/036478 2022-12-19 2023-10-06 コイル部品及びその製造方法、並びに、コイル部品を備える回路モジュール Ceased WO2024135042A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202380086971.XA CN120418897A (zh) 2022-12-19 2023-10-06 线圈部件及其制造方法以及具备线圈部件的电路模块
JP2024565616A JPWO2024135042A1 (enrdf_load_stackoverflow) 2022-12-19 2023-10-06

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5080789A (enrdf_load_stackoverflow) * 1973-10-30 1975-07-01
JPS53150435U (enrdf_load_stackoverflow) * 1977-04-30 1978-11-27
JPS6034009A (ja) * 1983-08-05 1985-02-21 Tohoku Metal Ind Ltd フェライトビードインダクター素子
JPH03125413A (ja) * 1989-10-09 1991-05-28 Tokin Corp 小型チョークコイル及びその製造方法
JP2015106574A (ja) * 2013-11-28 2015-06-08 Ｎｅｃトーキン株式会社 インダクタンス素子
JP2021176166A (ja) * 2020-05-01 2021-11-04 株式会社村田製作所 インダクタ部品及びインダクタ構造体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5080789A (enrdf_load_stackoverflow) * 1973-10-30 1975-07-01
JPS53150435U (enrdf_load_stackoverflow) * 1977-04-30 1978-11-27
JPS6034009A (ja) * 1983-08-05 1985-02-21 Tohoku Metal Ind Ltd フェライトビードインダクター素子
JPH03125413A (ja) * 1989-10-09 1991-05-28 Tokin Corp 小型チョークコイル及びその製造方法
JP2015106574A (ja) * 2013-11-28 2015-06-08 Ｎｅｃトーキン株式会社 インダクタンス素子
JP2021176166A (ja) * 2020-05-01 2021-11-04 株式会社村田製作所 インダクタ部品及びインダクタ構造体

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