WO2023188452A1 - Coil component and circuit board including same - Google Patents

Coil component and circuit board including same Download PDF

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Publication number
WO2023188452A1
WO2023188452A1 PCT/JP2022/031836 JP2022031836W WO2023188452A1 WO 2023188452 A1 WO2023188452 A1 WO 2023188452A1 JP 2022031836 W JP2022031836 W JP 2022031836W WO 2023188452 A1 WO2023188452 A1 WO 2023188452A1
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WO
WIPO (PCT)
Prior art keywords
coil
coil component
terminal electrode
terminal electrodes
differential signal
Prior art date
Application number
PCT/JP2022/031836
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French (fr)
Japanese (ja)
Inventor
祐樹 橋本
武史 奥村
敏之 阿部
将典 鈴木
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Tdk株式会社
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Publication of WO2023188452A1 publication Critical patent/WO2023188452A1/en

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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
    • H01F27/00—Details of transformers or inductances, in general
    • 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

Definitions

  • the present invention relates to a coil component and a circuit board including the same, and particularly relates to a coil component connected between a differential signal line and a power supply circuit and a circuit board including the same.
  • the present invention provides a coil component connected between a differential signal line and a power supply circuit, which is capable of alleviating impedance discontinuity while ensuring symmetry of the differential signal line.
  • An object of the present invention is to provide a coil component and a circuit board equipped with the same.
  • a coil component according to the present invention includes an element body containing a magnetic material, and first and second coils embedded in the element body and arranged in a second direction orthogonal to the first direction, with the first direction being the axial direction. a coil, first and second terminal electrodes connected to one end and the other end of the first coil, respectively, and third and fourth terminal electrodes connected to one end and the other end of the second coil, respectively. and the second, first, third and fourth terminal electrodes are exposed from the mounting surface of the element body and arranged in this order in the second direction, and the second, first, third and fourth terminal electrodes are connected to the first coil and the second coil. It is characterized by including a region in which no magnetic material exists.
  • a circuit board includes the above-described coil component and a board on which the above-described coil component is mounted, and the board has first and second differential signal lines extending in a first direction, and a second differential signal line extending in a first direction.
  • the coil component has a first power supply pad to which one power supply potential is supplied, and a second power supply pad to which a second power supply potential different from the first power supply potential is supplied, and the coil component
  • the device is mounted on the substrate so that the three terminal electrodes are connected to the first and second differential signal lines, respectively, and the second and fourth terminal electrodes are connected to the first and second power supply pads, respectively. It is characterized by
  • the coil component can be mounted on the board so that the first and third terminal electrodes overlap the first and second differential signal lines, respectively.
  • the first and second coils are integrated into a single coil component, the symmetry of the differential signal line is not compromised.
  • the coupling between the first coil and the second coil becomes weaker, which causes a decrease in the signal quality of the differential signal. It is also possible to prevent this.
  • the distance between the first terminal electrode and the third terminal electrode is the distance between the first terminal electrode and the second terminal electrode, and the distance between the third terminal electrode and the fourth terminal electrode. It doesn't matter if it is smaller than the distance. According to this, since the distance between the first terminal electrode and the third terminal electrode is shortened, the land pattern formed on the first and second differential signal lines is not necessary, or the land pattern is can be significantly downsized.
  • the mounting surface may extend in the first and second directions. According to this, it becomes possible to reduce the mounting area.
  • the element body further has first and second side surfaces that are perpendicular to the second direction and located opposite to each other, and the second terminal electrode is further exposed from the first side surface.
  • the fourth terminal electrode may be further exposed from the second side surface. According to this, the connection reliability between the second and fourth terminal electrodes and the first and second power supply pads is improved.
  • the winding direction of the first coil when the first terminal electrode is the starting point and the second terminal electrode is the ending point and the third terminal electrode is the starting point and the fourth terminal electrode is the ending point.
  • the winding directions of the second coils may be opposite to each other. According to this, since the magnetic field generated by the first coil and the magnetic field generated by the second coil cancel each other out, it is possible to prevent the signal quality of the differential signal from deteriorating.
  • the coil component according to the present invention may further include a third coil embedded in the element body and having one end and the other end connected to the first and third terminal electrodes, respectively. According to this, it becomes possible to insert the third coil between the first and second differential signal lines.
  • the first and second coils and the third coil may be arranged in a third direction orthogonal to the first and second directions. According to this, it is possible to prevent an increase in the mounting area.
  • the coil component according to the present invention includes a third coil embedded in the element body and having one end and the other end connected to the first and second terminal electrodes, respectively, and a third coil embedded in the element body and having one end and the other end connected to the first and second terminal electrodes, respectively. It is also possible to further include a fourth coil connected to the third and fourth terminal electrodes. According to this, it becomes possible to obtain higher inductance.
  • the first coil and the third coil are arranged in a third direction orthogonal to the first and second directions, and the second coil and the fourth coil are arranged in a third direction. It doesn't matter if you stay there. According to this, it is possible to prevent an increase in the mounting area.
  • FIG. 1 is a schematic perspective view showing the appearance of a coil component 100 according to a first embodiment of the present invention.
  • FIG. 2 is a schematic perspective view of the coil component 100.
  • FIG. 3 is a schematic cross-sectional view of the coil component 100.
  • FIG. 4 is a schematic plan view showing the pattern shape of the conductor layer 10.
  • FIG. 5 is a schematic plan view showing the pattern shape of the conductor layer 20.
  • FIG. 6 is a schematic plan view showing the pattern shape of the conductor layer 30.
  • FIG. 7 is a schematic plan view showing the pattern shape of the conductor layer 40.
  • FIG. 8 is a schematic exploded perspective view for explaining the configuration of the circuit board 2 including the coil component 100.
  • FIG. 9 is an equivalent circuit diagram of the circuit board 2 including the coil component 100.
  • FIG. 10 is a schematic perspective view showing the appearance of a coil component 200 according to the second embodiment of the present invention.
  • FIG. 11 is an equivalent circuit diagram of the circuit board 2 including the coil component 200.
  • FIG. 12 is a schematic perspective view showing the appearance of a coil component 300 according to the third embodiment of the present invention.
  • FIG. 13 is an equivalent circuit diagram of the circuit board 2 including the coil component 300.
  • FIG. 14 is a schematic cross-sectional view for explaining the configuration of a coil component 400 according to a fourth embodiment of the present invention.
  • FIG. 15 is a schematic diagram for explaining the structure of chips 401 and 402.
  • FIG. 1 is a schematic perspective view showing the appearance of a coil component 100 according to a first embodiment of the present invention.
  • 2 is a schematic perspective view of the coil component 100
  • FIG. 3 is a schematic cross-sectional view of the coil component 100.
  • the coil component 100 includes an element body 50 and coils C1 and C2 embedded therein.
  • the coils C1 and C2 are arranged in the X direction, and their axial directions are both in the Z direction.
  • the element body 50 is made of a composite magnetic member including a metal magnetic filler made of a magnetic material such as iron (Fe) or permalloy, and a resin binder, and constitutes a magnetic path for magnetic flux generated by passing current through the coils C1 and C2. do.
  • the resin binder it is preferable to use a liquid or powdered epoxy resin.
  • An insulating film 70 made of a resin material is provided between the coils C1, C2 and the element body 50, thereby preventing direct contact between the coils C1, C2 and the element body 50.
  • the element body 50 has a mounting surface 51 forming an XZ plane and side surfaces 52 and 53 forming a YZ plane and located on opposite sides, and terminal electrodes 61 to 64 are exposed on the mounting surface 51.
  • the terminal electrode 61 is connected to one end of the coil C1
  • the terminal electrode 62 is connected to the other end of the coil C1
  • the terminal electrode 63 is connected to one end of the coil C2
  • the terminal electrode 64 is connected to the other end of the coil C2. connected to the end.
  • the terminal electrodes 62, 61, 63, and 64 are arranged in this order in the X direction.
  • the terminal electrode 62 is also exposed from the side surface 52 of the element body 50, and the terminal electrode 64 is also exposed from the side surface 53 of the element body 50.
  • the terminal electrodes 62 and 64 constitute L-shaped electrodes.
  • the terminal electrodes 61 and 63 constitute bottom terminals exposed only from the mounting surface 51.
  • the internal shape of the terminal electrodes 61 and 63 may be L-shaped like the terminal electrodes 62 and 64, and the bottom terminals may be configured by exposing only from the mounting surface 51.
  • the distance between the terminal electrodes 61 and 63 in the X direction is L1
  • the distance between the terminal electrodes 61 and 62 in the X direction is L2
  • the distance between the terminal electrodes 63 and 64 in the X direction is L3
  • L3 is defined as L3
  • the separation distance L1 is smaller than the separation distances L2 and L3.
  • the coils C1 and C2 are composed of conductor layers 10, 20, 30, and 40.
  • the conductor layers 10, 20, 30, and 40 are stacked in the Z direction with an insulating film 70 in between.
  • 4 to 7 are schematic plan views showing the pattern shapes of the conductor layers 10, 20, 30, and 40, respectively.
  • the conductor layer 10 includes spiral patterns 11 and 12 and connection patterns 13 and 14.
  • the spiral pattern 11 is a part of the coil C1, and its outer peripheral end is connected to the terminal electrode 62.
  • the spiral pattern 12 is a part of the coil C2, and its outer peripheral end is connected to the terminal electrode 64.
  • Connection patterns 13 and 14 are connected to terminal electrodes 61 and 63, respectively.
  • the conductor layer 20 includes spiral patterns 21 and 22 and connection patterns 23 to 26.
  • the spiral pattern 21 is a part of the coil C1, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 11.
  • the spiral pattern 22 is a part of the coil C2, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 12.
  • the connection patterns 23 to 26 are connected to terminal electrodes 61, 63, 62, and 64, respectively.
  • the conductor layer 30 includes spiral patterns 31 and 32 and connection patterns 33 to 36.
  • the spiral pattern 31 is a part of the coil C1, and its outer peripheral end is connected to the outer peripheral end of the spiral pattern 21.
  • the spiral pattern 32 is a part of the coil C2, and its outer peripheral end is connected to the outer peripheral end of the spiral pattern 22.
  • the connection patterns 33 to 36 are connected to terminal electrodes 61, 63, 62, and 64, respectively.
  • the conductor layer 40 includes spiral patterns 41 and 42 and connection patterns 45 and 46.
  • the spiral pattern 41 is a part of the coil C1, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 31, and its outer peripheral end is connected to the terminal electrode 61.
  • the spiral pattern 42 is a part of the coil C2, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 32, and its outer peripheral end is connected to the terminal electrode 63.
  • Connection patterns 45 and 46 are connected to terminal electrodes 62 and 64, respectively.
  • the spiral patterns 11, 21, 31, and 41 constitute the coil C1
  • the spiral patterns 12, 22, 32, and 42 constitute the coil C2.
  • the winding direction of the coil C1 is counterclockwise
  • the terminal electrode 63 is the starting point
  • the terminal electrode 64 is the winding direction.
  • the winding direction of the coil C2 at the end point is right (clockwise), and both directions are opposite to each other.
  • An element body 50 containing a magnetic material is provided in the inner diameter region and the outer region in the radial direction of the coils C1 and C2 having such a configuration.
  • an insulating film 70 is provided between the coils C1, C2 and the element body 50 to prevent contact between them.
  • a part between the coil C1 and the coil C2 is filled with an insulating film 70, and the element body 50 does not exist between the coil C1 and the coil C2 in this region.
  • connection patterns 13, 23, and 33 are connected to the outer peripheral end of the spiral pattern 41 via via conductors provided through the insulating film 70, and terminal electrodes 61 are provided on their outer surfaces.
  • the connection patterns 14, 24, and 34 are connected to the outer peripheral end of the spiral pattern 42 via via conductors provided through the insulating film 70, and terminal electrodes 63 are provided on their outer surfaces.
  • the connection patterns 25, 35, and 45 are connected to the outer circumferential ends of the spiral pattern 11 via via conductors provided through the insulating film 70, and terminal electrodes 62 are provided on the outer surfaces thereof.
  • connection patterns 26, 36, and 46 are connected to the outer peripheral end of the spiral pattern 12 via via conductors provided through the insulating film 70, and terminal electrodes 64 are provided on their outer surfaces.
  • FIG. 8 is a schematic exploded perspective view for explaining the configuration of the circuit board 2 including the coil component 100 according to the present embodiment.
  • the circuit board 2 shown in FIG. 8 includes a board 80 and a coil component 100 mounted thereon.
  • a mounting area 100A for the coil component 100 is defined on the board 80, and the coil component 100 is mounted on the board 80 such that the mounting surface 51 of the coil component 100 faces the mounting area 100A.
  • a pair of differential signal lines 81 and 82 that are adjacent to each other in the X direction and extend in the Z direction, and power supply pads 83 and 84 are provided on the surface of the substrate 80. Parts of the lines 81 and 82 and the power supply pads 83 and 84 overlap.
  • the differential signal lines 81 and 82 are transmission lines for transmitting differential signals, and in order to improve the symmetry of the differential signals, the distance L0 between them in the X direction is very short.
  • the power supply pad 83 is supplied with, for example, a higher power supply potential Vcc via a power supply line
  • the power supply pad 84 is supplied with, for example, a lower power supply potential GND (ground potential) via a power supply line.
  • the terminal electrodes 61 and 63 are connected to the differential signal lines 81 and 82, respectively, and the terminal electrodes 62 and 64 are connected to the power supply pads 83 and 84, respectively.
  • FIG. 9 which is an equivalent circuit diagram
  • the coil C1 is inserted between the differential signal line 81 and the Vcc node of the power circuit 85, and the coil C1 is inserted between the differential signal line 82 and the GND node of the power circuit 85
  • Coil C2 will be inserted into. Therefore, when the differential signal lines 81 and 82 are used as power supply lines by superimposing a DC voltage on them, the differential signal components flowing through the differential signal lines 81 and 82 do not flow into the power supply circuit 85.
  • the terminal electrodes 61 and 63 are directly connected to the differential signal lines 81 and 82 so as to overlap with the differential signal lines 81 and 82.
  • the distance L1 between the terminal electrodes 61 and 63 is made sufficiently narrow, and is ideally designed to be similar to the distance L0 between the differential signal lines 81 and 82. This makes it possible to reduce impedance discontinuity at the connection with the coil component 100, compared to the case where the coil component is connected to the land pattern drawn out from the differential signal lines 81 and 82.
  • the two coils C1 and C2 connected to the differential signal lines 81 and 82, respectively, are integrated into one coil component 100, the number of components can be reduced, and the differential signal lines 81 and 82 symmetry is also ensured.
  • the distance L2 between the terminal electrodes 61 and 62 and the distance L3 between the terminal electrodes 63 and 64 are larger than the distance L1
  • the distance between the differential signal lines 81 and 82 and the power supply pads 83 and 84 is larger than the distance L1. It becomes possible to ensure sufficient insulation.
  • the winding direction of the coil C1 starts from the terminal electrode 61 connected to the differential signal line 81
  • the winding direction of the coil C2 starts from the terminal electrode 63 connected to the differential signal line 82. Since the winding directions of the coils C1 and C2 are opposite to each other, the magnetic fields generated in the coils C1 and C2 by complementary signals flowing in the differential signal lines 81 and 82 are in the same direction. As a result, the magnetic field generated by the coil C1 and the magnetic field generated by the coil C2 cancel each other out, making it possible to prevent the signal quality of the differential signal from deteriorating.
  • a part between the coil C1 and the coil C2 is filled with the insulating film 70, and since the element body 50 does not exist between the coil C1 and the coil C2 in this region, the coupling between the coil C1 and the coil C2 is prevented. itself can be reduced.
  • the terminal electrodes 62 and 64 connected to the power supply pads 83 and 84 have an L-shaped structure, when the coil component 100 is mounted on the board 80 using solder, the side surface 52 of the element body 50 , 53 are formed with solder fillets. This not only improves the connection reliability between the terminal electrodes 62 and 64 and the power supply pads 83 and 84, but also improves the mounting reliability of the coil component 100 as a whole.
  • the pitch of the terminal electrodes 61, 63 in the X direction and the pitch of the differential signal lines 81, 82 in the X direction completely match; It does not matter if the pitch in the X direction is narrower than that of the terminal electrodes 61 and 63.
  • the width of the differential signal lines 81, 82 in the X direction is slightly expanded outward at the connection portion with the terminal electrodes 61, 63, and the pitch of the differential signal lines 81, 82 is locally adjusted in this portion. By expanding it, it becomes possible to improve connection reliability.
  • FIG. 10 is a schematic perspective view showing the appearance of a coil component 200 according to the second embodiment of the present invention.
  • the coil component 200 according to the second embodiment is different from the coil component 100 according to the first embodiment in that it further includes a coil C3 embedded in the element body 50. Since the other basic configurations are the same as the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted.
  • Coil C3 is arranged above coils C1 and C2 in the Y direction.
  • the axial direction of the coil C3 is the Z direction, and its diameter is larger than the diameters of the coils C1 and C2.
  • One end of the coil C3 is connected to the terminal electrode 61, and the other end of the coil C3 is connected to the terminal electrode 63.
  • the coil component 200 according to this embodiment When the coil component 200 according to this embodiment is mounted on the board 80 shown in FIG. 8, the coil C3 will be inserted between the differential signal lines 81 and 82, as shown in FIG. 11 which is an equivalent circuit diagram. This makes it possible to add a predetermined inductance component between the differential signal lines 81 and 82. Moreover, since the coil C3 is arranged above the coils C1 and C2 in the Y direction, the mounting area does not increase compared to the coil component 100 according to the first embodiment. Note that the positions of the coils C1 and C2 and the coil C3 in the Y direction may be reversed.
  • FIG. 12 is a schematic perspective view showing the appearance of a coil component 300 according to the third embodiment of the present invention.
  • the coil component 300 according to the third embodiment is different from the coil component 100 according to the first embodiment in that it further includes coils C4 and C5 embedded in the element body 50. Since the other basic configurations are the same as the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted.
  • the coil C4 is arranged above the coil C1 in the Y direction, and the coil C5 is arranged above the coil C2 in the Y direction.
  • the axial direction of both the coils C4 and C5 is the Z direction, and the diameter thereof is the same as the diameter of the coils C1 and C2.
  • One end and the other end of the coil C4 are connected to terminal electrodes 61 and 62, respectively, similarly to the coil C1.
  • One end and the other end of the coil C5 are connected to terminal electrodes 63 and 64, respectively, similarly to the coil C2.
  • the coils C1 and C4 are connected between the differential signal line 81 and the Vcc node of the power supply circuit 85, as shown in FIG. are inserted in parallel, and coils C2 and C5 are inserted in parallel between the differential signal line 82 and the GND node of the power supply circuit 85.
  • This makes it possible to reduce the DC resistance between the differential signal lines 81 and 82 and the power supply circuit 85.
  • the coils C4 and C5 are arranged above the coils C1 and C2 in the Y direction, the mounting area does not increase compared to the coil component 100 according to the first embodiment. Note that the positions of the coils C1, C2 and the coils C4, C5 in the Y direction may be reversed.
  • the coils C1 and C4 may be connected in series, and the coils C2 and C5 may be connected in series. According to this, it becomes possible to increase the inductance between the differential signal lines 81 and 82 and the power supply circuit 85.
  • FIG. 14 is a schematic cross-sectional view for explaining the configuration of a coil component 400 according to the fourth embodiment of the present invention.
  • the coil component 400 according to the fourth embodiment is different from the coil according to the first embodiment in that the coils C1 and C2 are manufactured as separate parts and are integrated by an insulating member 71. It is different from part 100. Since the other basic configurations are the same as the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted. As shown in the schematic diagram of FIG. 15, the coil component 400 having such a configuration includes a chip 401 having a coil C1 and terminal electrodes 61, 62 having an L-shaped structure, and a coil C2 having an L-shaped structure.
  • a chip 402 having terminal electrodes 63 and 64 can be fabricated by integrating the chip 402 with an insulating member 71 so that the terminal electrodes 61 to 64 are exposed from the mounting surface 51.
  • the relationship between the axial direction of the coils C1 and C2 and the mounting surface is not particularly limited, and the axial direction of the coils C1 and C2 may both be horizontal to the mounting surface, or the axial direction of the coils C1 and C2 may be horizontal to the mounting surface. It does not matter if both axial directions are perpendicular to the mounting surface, or the axial direction of the coil C1 may be horizontal to the mounting surface, and the axial direction of the coil C2 may be perpendicular to the mounting surface. do not have.
  • Circuit board 10 20, 30, 40 Conductor layer 11, 12, 21, 22, 31, 32, 41, 42 Spiral pattern 13, 14, 23 to 26, 33 to 36, 45, 46 Connection pattern 50 Element body 51 Mounting surfaces 52, 53 Side surfaces 61 to 64 Terminal electrode 70 Insulating film 71 Insulating member 80 Substrate 81, 82 Differential signal lines 83, 84 Power supply pad 85 Power supply circuit 100, 200, 300, 400 Coil component 100A Mounting area 401, 402 Chip C1 ⁇ C5 coil

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  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

[Problem] To mitigate the discontinuity of impedance while securing the symmetry of a differential signal line. [Solution] A coil component 100 comprises: coils C1, C2 which are embedded in a body 50 containing a magnetic material and are arranged in an X-direction with a Z-direction serving as an axial direction; terminal electrodes 61, 62 which are connected to one end and the other end of the coil C1, respectively; and terminal electrodes 63, 64 which are connected to one end and the other end of the coil C2, respectively. The terminal electrodes 62, 61, 63, 64 are exposed from a mounting surface 51, and arranged in this order in the X-direction. A region where no magnetic material is present is included between the coils C1 and C2. Accordingly, due to the weakening of the coupling between the coils C1 and C2, it is possible to prevent a deterioration in signal quality of a differential signal.

Description

コイル部品及びこれを備える回路基板Coil parts and circuit boards equipped with the same
　本発明はコイル部品及びこれを備える回路基板に関し、特に、差動信号ラインと電源回路との間に接続されるコイル部品及びこれを備える回路基板に関する。 The present invention relates to a coil component and a circuit board including the same, and particularly relates to a coil component connected between a differential signal line and a power supply circuit and a circuit board including the same.
　近年、差動信号ラインに直流電圧を重畳させることにより、差動信号ラインを電源ラインとして用いる技術が知られている。差動信号ラインを電源ラインとして用いる場合、差動信号成分が電源回路に流れ込まないよう、差動信号ラインと電源回路の間にコイル部品が挿入される（特許文献１参照）。 In recent years, a technique has been known in which a differential signal line is used as a power supply line by superimposing a DC voltage on the differential signal line. When using a differential signal line as a power supply line, a coil component is inserted between the differential signal line and the power supply circuit so that differential signal components do not flow into the power supply circuit (see Patent Document 1).
国際公開第２０２０／０１２７９４号International Publication No. 2020/012794
　しかしながら、差動信号ラインと電源回路の間の間にコイル部品を挿入する場合、通常は、コイル部品を実装するためのランドパターンが差動信号ラインに設けられることから、ランドパターンが設けられた部分においてインピーダンスの不連続性が生じるという問題があった。しかも、一対の差動信号ラインのそれぞれに別個のコイル部品を接続すると、製造ばらつきや実装ばらつきなどによって、差動信号ラインの対称性が損なわれるおそれもあった。 However, when inserting a coil component between the differential signal line and the power supply circuit, a land pattern is usually provided on the differential signal line to mount the coil component. There was a problem in that impedance discontinuity occurred in some parts. Furthermore, if separate coil components were connected to each of the pair of differential signal lines, there was a risk that the symmetry of the differential signal lines would be lost due to manufacturing variations, mounting variations, and the like.
　したがって、本発明は、差動信号ラインと電源回路との間に接続されるコイル部品であって、差動信号ラインの対称性を確保しつつ、インピーダンスの不連続性を緩和することが可能なコイル部品及びこれを備える回路基板を提供することを目的とする。 Therefore, the present invention provides a coil component connected between a differential signal line and a power supply circuit, which is capable of alleviating impedance discontinuity while ensuring symmetry of the differential signal line. An object of the present invention is to provide a coil component and a circuit board equipped with the same.
　本発明によるコイル部品は、磁性材料を含む素体と、素体に埋め込まれ、第１の方向を軸方向とし、第１の方向と直交する第２の方向に配列された第１及び第２のコイルと、第１のコイルの一端及び他端にそれぞれ接続された第１及び第２の端子電極と、第２のコイルの一端及び他端にそれぞれ接続された第３及び第４の端子電極とを備え、第２、第１、第３及び第４の端子電極は、素体の実装面から露出し、且つ、この順に第２の方向に配列され、第１コイルと第２のコイルの間には磁性材料の存在しない領域が含まれることを特徴とする。 A coil component according to the present invention includes an element body containing a magnetic material, and first and second coils embedded in the element body and arranged in a second direction orthogonal to the first direction, with the first direction being the axial direction. a coil, first and second terminal electrodes connected to one end and the other end of the first coil, respectively, and third and fourth terminal electrodes connected to one end and the other end of the second coil, respectively. and the second, first, third and fourth terminal electrodes are exposed from the mounting surface of the element body and arranged in this order in the second direction, and the second, first, third and fourth terminal electrodes are connected to the first coil and the second coil. It is characterized by including a region in which no magnetic material exists.
　本発明による回路基板は、上記のコイル部品と、上記のコイル部品が実装された基板とを備え、基板は、第１の方向に延在する第１及び第２の差動信号ラインと、第１の電源電位が供給される第１の電源パッドと、第１の電源電位とは異なる第２の電源電位が供給される第２の電源パッドとを有し、コイル部品は、第１及び第３の端子電極がそれぞれ第１及び第２の差動信号ラインに接続され、第２及び第４の端子電極がそれぞれ第１及び第２の電源パッドに接続されるよう、基板に実装されていることを特徴とする。 A circuit board according to the present invention includes the above-described coil component and a board on which the above-described coil component is mounted, and the board has first and second differential signal lines extending in a first direction, and a second differential signal line extending in a first direction. The coil component has a first power supply pad to which one power supply potential is supplied, and a second power supply pad to which a second power supply potential different from the first power supply potential is supplied, and the coil component The device is mounted on the substrate so that the three terminal electrodes are connected to the first and second differential signal lines, respectively, and the second and fourth terminal electrodes are connected to the first and second power supply pads, respectively. It is characterized by
　本発明によれば、第１及び第３の端子電極がそれぞれ第１及び第２の差動信号ラインと重なるよう、コイル部品を基板に実装することができる。これにより、第１及び第２の差動信号ラインに形成するランドパターンが不要となり、或いは、ランドパターンを小型化することができることから、差動信号ラインに生じるインピーダンスの不連続性を低減することが可能となる。しかも、第１及び第２のコイルが単一のコイル部品に集積されていることから、差動信号ラインの対称性が損なわれることもない。さらに、第１コイルと第２のコイルの間には磁性材料の存在しない領域が含まれることから、第１のコイルと第２のコイルの結合が弱くなり、差動信号の信号品質の低下を防止することも可能となる。 According to the present invention, the coil component can be mounted on the board so that the first and third terminal electrodes overlap the first and second differential signal lines, respectively. This eliminates the need for a land pattern to be formed on the first and second differential signal lines, or makes it possible to downsize the land pattern, thereby reducing impedance discontinuity occurring in the differential signal lines. becomes possible. Furthermore, since the first and second coils are integrated into a single coil component, the symmetry of the differential signal line is not compromised. Furthermore, since there is a region between the first coil and the second coil where no magnetic material exists, the coupling between the first coil and the second coil becomes weaker, which causes a decrease in the signal quality of the differential signal. It is also possible to prevent this.
　本発明において、第１の端子電極と第３の端子電極の離間距離は、第１の端子電極と第２の端子電極の離間距離、並びに、第３の端子電極と第４の端子電極の離間距離よりも小さくても構わない。これによれば、第１の端子電極と第３の端子電極の離間距離が短縮されていることから、第１及び第２の差動信号ラインに形成するランドパターンが不要となり、或いは、ランドパターンを大幅に小型化することができる。 In the present invention, the distance between the first terminal electrode and the third terminal electrode is the distance between the first terminal electrode and the second terminal electrode, and the distance between the third terminal electrode and the fourth terminal electrode. It doesn't matter if it is smaller than the distance. According to this, since the distance between the first terminal electrode and the third terminal electrode is shortened, the land pattern formed on the first and second differential signal lines is not necessary, or the land pattern is can be significantly downsized.
　本発明において、実装面は第１及び第２の方向に延在しても構わない。これによれば、実装面積を低減することが可能となる。 In the present invention, the mounting surface may extend in the first and second directions. According to this, it becomes possible to reduce the mounting area.
　本発明において、素体は、第２の方向に対して垂直であり、互いに反対側に位置する第１及び第２の側面をさらに有し、第２の端子電極は第１の側面からさらに露出し、第４の端子電極は第２の側面からさらに露出するものであっても構わない。これによれば、第２及び第４の端子電極と第１及び第２の電源パッドの接続信頼性が高められる。 In the present invention, the element body further has first and second side surfaces that are perpendicular to the second direction and located opposite to each other, and the second terminal electrode is further exposed from the first side surface. However, the fourth terminal electrode may be further exposed from the second side surface. According to this, the connection reliability between the second and fourth terminal electrodes and the first and second power supply pads is improved.
　本発明において、第１の端子電極を始点とし、第２の端子電極を終点とした場合における第１のコイルの巻回方向と、第３の端子電極を始点とし、第４の端子電極を終点とした場合における第２のコイルの巻回方向は、互いに逆向きであっても構わない。これによれば、第１のコイルによって生じる磁界と第２のコイルによって生じる磁界が打ち消し合うことから、差動信号の信号品質の低下を防止することが可能となる。 In the present invention, the winding direction of the first coil when the first terminal electrode is the starting point and the second terminal electrode is the ending point, and the third terminal electrode is the starting point and the fourth terminal electrode is the ending point. In this case, the winding directions of the second coils may be opposite to each other. According to this, since the magnetic field generated by the first coil and the magnetic field generated by the second coil cancel each other out, it is possible to prevent the signal quality of the differential signal from deteriorating.
　本発明によるコイル部品は、素体に埋め込まれ、一端及び他端がそれぞれ第１及び第３の端子電極に接続された第３のコイルをさらに備えていても構わない。これによれば、第１及び第２の差動信号ライン間に第３のコイルを挿入することが可能となる。この場合、第１及び第２のコイルと第３のコイルは、第１及び第２の方向と直交する第３の方向に配列されていても構わない。これによれば、実装面積の増加を防止することが可能となる。 The coil component according to the present invention may further include a third coil embedded in the element body and having one end and the other end connected to the first and third terminal electrodes, respectively. According to this, it becomes possible to insert the third coil between the first and second differential signal lines. In this case, the first and second coils and the third coil may be arranged in a third direction orthogonal to the first and second directions. According to this, it is possible to prevent an increase in the mounting area.
　本発明によるコイル部品は、素体に埋め込まれ、一端及び他端がそれぞれ第１及び第２の端子電極に接続された第３のコイルと、素体に埋め込まれ、一端及び他端がそれぞれ第３及び第４の端子電極に接続された第４のコイルとをさらに備えても構わない。これによれば、より高いインダクタンスを得ることが可能となる。この場合、第１のコイルと第３のコイルは、第１及び第２の方向と直交する第３の方向に配列され、第２のコイルと第４のコイルは、第３の方向に配列されていても構わない。これによれば、実装面積の増加を防止することが可能となる。 The coil component according to the present invention includes a third coil embedded in the element body and having one end and the other end connected to the first and second terminal electrodes, respectively, and a third coil embedded in the element body and having one end and the other end connected to the first and second terminal electrodes, respectively. It is also possible to further include a fourth coil connected to the third and fourth terminal electrodes. According to this, it becomes possible to obtain higher inductance. In this case, the first coil and the third coil are arranged in a third direction orthogonal to the first and second directions, and the second coil and the fourth coil are arranged in a third direction. It doesn't matter if you stay there. According to this, it is possible to prevent an increase in the mounting area.
　このように、本発明によれば、差動信号ラインの対称性を確保しつつ、インピーダンスの不連続性を緩和することが可能となる。 As described above, according to the present invention, it is possible to alleviate impedance discontinuity while ensuring the symmetry of the differential signal line.
図１は、本発明の第１の実施形態によるコイル部品１００の外観を示す略斜視図である。FIG. 1 is a schematic perspective view showing the appearance of a coil component 100 according to a first embodiment of the present invention. 図２は、コイル部品１００の略透視斜視図である。FIG. 2 is a schematic perspective view of the coil component 100. 図３は、コイル部品１００の略断面図である。FIG. 3 is a schematic cross-sectional view of the coil component 100. 図４は、導体層１０のパターン形状を示す略平面図である。FIG. 4 is a schematic plan view showing the pattern shape of the conductor layer 10. 図５は、導体層２０のパターン形状を示す略平面図である。FIG. 5 is a schematic plan view showing the pattern shape of the conductor layer 20. As shown in FIG. 図６は、導体層３０のパターン形状を示す略平面図である。FIG. 6 is a schematic plan view showing the pattern shape of the conductor layer 30. 図７は、導体層４０のパターン形状を示す略平面図である。FIG. 7 is a schematic plan view showing the pattern shape of the conductor layer 40. 図８は、コイル部品１００を備える回路基板２の構成を説明するための略分解斜視図である。FIG. 8 is a schematic exploded perspective view for explaining the configuration of the circuit board 2 including the coil component 100. 図９は、コイル部品１００を備える回路基板２の等価回路図である。FIG. 9 is an equivalent circuit diagram of the circuit board 2 including the coil component 100. 図１０は、本発明の第２の実施形態によるコイル部品２００の外観を示す略透視斜視図である。FIG. 10 is a schematic perspective view showing the appearance of a coil component 200 according to the second embodiment of the present invention. 図１１は、コイル部品２００を備える回路基板２の等価回路図である。FIG. 11 is an equivalent circuit diagram of the circuit board 2 including the coil component 200. 図１２は、本発明の第３の実施形態によるコイル部品３００の外観を示す略透視斜視図である。FIG. 12 is a schematic perspective view showing the appearance of a coil component 300 according to the third embodiment of the present invention. 図１３は、コイル部品３００を備える回路基板２の等価回路図である。FIG. 13 is an equivalent circuit diagram of the circuit board 2 including the coil component 300. 図１４は、本発明の第４の実施形態によるコイル部品４００の構成を説明するための略断面図である。FIG. 14 is a schematic cross-sectional view for explaining the configuration of a coil component 400 according to a fourth embodiment of the present invention. 図１５は、チップ４０１，４０２の構造を説明するための模式図である。FIG. 15 is a schematic diagram for explaining the structure of chips 401 and 402.
　以下、添付図面を参照しながら、本発明の好ましい実施形態について詳細に説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
　図１は、本発明の第１の実施形態によるコイル部品１００の外観を示す略斜視図である。また、図２はコイル部品１００の略透視斜視図であり、図３はコイル部品１００の略断面図である。 FIG. 1 is a schematic perspective view showing the appearance of a coil component 100 according to a first embodiment of the present invention. 2 is a schematic perspective view of the coil component 100, and FIG. 3 is a schematic cross-sectional view of the coil component 100.
　図１～図３に示すように、第１の実施形態によるコイル部品１００は、素体５０及びこれに埋め込まれたコイルＣ１，Ｃ２を備えている。コイルＣ１，Ｃ２はＸ方向に配列されており、その軸方向はいずれもＺ方向である。素体５０は、鉄（Ｆｅ）やパーマロイのなど磁性材料などからなる金属磁性体フィラーと樹脂バインダーを含む複合磁性部材からなり、コイルＣ１，Ｃ２に電流を流すことによって生じる磁束の磁路を構成する。樹脂バインダーとしては、液状又は粉体のエポキシ樹脂を用いることが好ましい。コイルＣ１，Ｃ２と素体５０の間には樹脂材料からなる絶縁膜７０が設けられており、これによりコイルＣ１，Ｃ２と素体５０の直接的な接触が防止されている。 As shown in FIGS. 1 to 3, the coil component 100 according to the first embodiment includes an element body 50 and coils C1 and C2 embedded therein. The coils C1 and C2 are arranged in the X direction, and their axial directions are both in the Z direction. The element body 50 is made of a composite magnetic member including a metal magnetic filler made of a magnetic material such as iron (Fe) or permalloy, and a resin binder, and constitutes a magnetic path for magnetic flux generated by passing current through the coils C1 and C2. do. As the resin binder, it is preferable to use a liquid or powdered epoxy resin. An insulating film 70 made of a resin material is provided between the coils C1, C2 and the element body 50, thereby preventing direct contact between the coils C1, C2 and the element body 50.
　素体５０は、ＸＺ面を構成する実装面５１と、ＹＺ面を構成し互いに反対側に位置する側面５２，５３を有し、実装面５１に端子電極６１～６４が露出している。後述するように、端子電極６１はコイルＣ１の一端に接続され、端子電極６２はコイルＣ１の他端に接続され、端子電極６３はコイルＣ２の一端に接続され、端子電極６４はコイルＣ２の他端に接続される。端子電極６２，６１，６３，６４は、Ｘ方向にこの順に配列されている。このうち、端子電極６２は素体５０の側面５２からも露出し、端子電極６４は素体５０の側面５３からも露出している。これにより、端子電極６２，６４はＬ字型電極を構成する。これに対し、端子電極６１，６３は実装面５１のみから露出する底面端子を構成する。また、端子電極６１，６３の内部形状を端子電極６２，６４と同じくＬ字型とし、実装面５１からのみ露出させることによって底面端子を構成しても構わない。 The element body 50 has a mounting surface 51 forming an XZ plane and side surfaces 52 and 53 forming a YZ plane and located on opposite sides, and terminal electrodes 61 to 64 are exposed on the mounting surface 51. As will be described later, the terminal electrode 61 is connected to one end of the coil C1, the terminal electrode 62 is connected to the other end of the coil C1, the terminal electrode 63 is connected to one end of the coil C2, and the terminal electrode 64 is connected to the other end of the coil C2. connected to the end. The terminal electrodes 62, 61, 63, and 64 are arranged in this order in the X direction. Of these, the terminal electrode 62 is also exposed from the side surface 52 of the element body 50, and the terminal electrode 64 is also exposed from the side surface 53 of the element body 50. Thereby, the terminal electrodes 62 and 64 constitute L-shaped electrodes. On the other hand, the terminal electrodes 61 and 63 constitute bottom terminals exposed only from the mounting surface 51. Alternatively, the internal shape of the terminal electrodes 61 and 63 may be L-shaped like the terminal electrodes 62 and 64, and the bottom terminals may be configured by exposing only from the mounting surface 51.
　ここで、端子電極６１と端子電極６３のＸ方向における離間距離をＬ１とし、端子電極６１と端子電極６２のＸ方向における離間距離をＬ２とし、端子電極６３と端子電極６４のＸ方向における離間距離をＬ３とした場合、離間距離Ｌ１は離間距離Ｌ２，Ｌ３よりも小さい。 Here, the distance between the terminal electrodes 61 and 63 in the X direction is L1, the distance between the terminal electrodes 61 and 62 in the X direction is L2, and the distance between the terminal electrodes 63 and 64 in the X direction. When L3 is defined as L3, the separation distance L1 is smaller than the separation distances L2 and L3.
　図３に示すように、コイルＣ１，Ｃ２は導体層１０，２０，３０，４０によって構成されている。導体層１０，２０，３０，４０は、絶縁膜７０を介してＺ方向に積層されている。 As shown in FIG. 3, the coils C1 and C2 are composed of conductor layers 10, 20, 30, and 40. The conductor layers 10, 20, 30, and 40 are stacked in the Z direction with an insulating film 70 in between.
　図４～図７は、それぞれ導体層１０，２０，３０，４０のパターン形状を示す略平面図である。 4 to 7 are schematic plan views showing the pattern shapes of the conductor layers 10, 20, 30, and 40, respectively.
　図４に示すように、導体層１０は、スパイラルパターン１１，１２と、接続パターン１３，１４を含む。スパイラルパターン１１はコイルＣ１の一部であり、その外周端は端子電極６２に接続されている。スパイラルパターン１２はコイルＣ２の一部であり、その外周端は端子電極６４に接続される。接続パターン１３，１４は、それぞれ端子電極６１，６３に接続される。 As shown in FIG. 4, the conductor layer 10 includes spiral patterns 11 and 12 and connection patterns 13 and 14. The spiral pattern 11 is a part of the coil C1, and its outer peripheral end is connected to the terminal electrode 62. The spiral pattern 12 is a part of the coil C2, and its outer peripheral end is connected to the terminal electrode 64. Connection patterns 13 and 14 are connected to terminal electrodes 61 and 63, respectively.
　図５に示すように、導体層２０は、スパイラルパターン２１，２２と、接続パターン２３～２６を含む。スパイラルパターン２１はコイルＣ１の一部であり、その内周端はスパイラルパターン１１の内周端に接続される。スパイラルパターン２２はコイルＣ２の一部であり、その内周端はスパイラルパターン１２の内周端に接続される。接続パターン２３～２６は、それぞれ端子電極６１，６３，６２，６４に接続される。 As shown in FIG. 5, the conductor layer 20 includes spiral patterns 21 and 22 and connection patterns 23 to 26. The spiral pattern 21 is a part of the coil C1, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 11. The spiral pattern 22 is a part of the coil C2, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 12. The connection patterns 23 to 26 are connected to terminal electrodes 61, 63, 62, and 64, respectively.
　図６に示すように、導体層３０は、スパイラルパターン３１，３２と、接続パターン３３～３６を含む。スパイラルパターン３１はコイルＣ１の一部であり、その外周端はスパイラルパターン２１の外周端に接続される。スパイラルパターン３２はコイルＣ２の一部であり、その外周端はスパイラルパターン２２の外周端に接続される。接続パターン３３～３６は、それぞれ端子電極６１，６３，６２，６４に接続される。 As shown in FIG. 6, the conductor layer 30 includes spiral patterns 31 and 32 and connection patterns 33 to 36. The spiral pattern 31 is a part of the coil C1, and its outer peripheral end is connected to the outer peripheral end of the spiral pattern 21. The spiral pattern 32 is a part of the coil C2, and its outer peripheral end is connected to the outer peripheral end of the spiral pattern 22. The connection patterns 33 to 36 are connected to terminal electrodes 61, 63, 62, and 64, respectively.
　図７に示すように、導体層４０は、スパイラルパターン４１，４２と、接続パターン４５，４６を含む。スパイラルパターン４１はコイルＣ１の一部であり、その内周端はスパイラルパターン３１の内周端に接続され、その外周端は端子電極６１に接続される。スパイラルパターン４２はコイルＣ２の一部であり、その内周端はスパイラルパターン３２の内周端に接続され、その外周端は端子電極６３に接続される。接続パターン４５，４６は、それぞれ端子電極６２，６４に接続される。 As shown in FIG. 7, the conductor layer 40 includes spiral patterns 41 and 42 and connection patterns 45 and 46. The spiral pattern 41 is a part of the coil C1, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 31, and its outer peripheral end is connected to the terminal electrode 61. The spiral pattern 42 is a part of the coil C2, and its inner peripheral end is connected to the inner peripheral end of the spiral pattern 32, and its outer peripheral end is connected to the terminal electrode 63. Connection patterns 45 and 46 are connected to terminal electrodes 62 and 64, respectively.
　このような構成により、スパイラルパターン１１，２１，３１，４１によってコイルＣ１が構成され、スパイラルパターン１２，２２，３２，４２によってコイルＣ２が構成される。ここで、端子電極６１を始点とし、端子電極６２を終点とした場合におけるコイルＣ１の巻回方向は左回り（反時計回り）であるのに対し、端子電極６３を始点とし、端子電極６４を終点とした場合におけるコイルＣ２の巻回方向は右回り（時計回り）であり、両者は互いに逆向きである。このような構成を有するコイルＣ１，Ｃ２の内径領域及び径方向における外側領域には、磁性材料を含む素体５０が設けられている。また、コイルＣ１，Ｃ２と素体５０の間には、両者の接触を防ぐ絶縁膜７０が設けられている。ここで、コイルＣ１とコイルＣ２の間の一部は絶縁膜７０で満たされており、この領域においてはコイルＣ１とコイルＣ２の間に素体５０が存在しない。 With such a configuration, the spiral patterns 11, 21, 31, and 41 constitute the coil C1, and the spiral patterns 12, 22, 32, and 42 constitute the coil C2. Here, when the terminal electrode 61 is the starting point and the terminal electrode 62 is the ending point, the winding direction of the coil C1 is counterclockwise, whereas the terminal electrode 63 is the starting point and the terminal electrode 64 is the winding direction. The winding direction of the coil C2 at the end point is right (clockwise), and both directions are opposite to each other. An element body 50 containing a magnetic material is provided in the inner diameter region and the outer region in the radial direction of the coils C1 and C2 having such a configuration. Further, an insulating film 70 is provided between the coils C1, C2 and the element body 50 to prevent contact between them. Here, a part between the coil C1 and the coil C2 is filled with an insulating film 70, and the element body 50 does not exist between the coil C1 and the coil C2 in this region.
　接続パターン１３，２３，３３は、絶縁膜７０を貫通して設けられたビア導体を介してスパイラルパターン４１の外周端に接続され、これらの外表面に端子電極６１が設けられる。接続パターン１４，２４，３４は、絶縁膜７０を貫通して設けられたビア導体を介してスパイラルパターン４２の外周端に接続され、これらの外表面に端子電極６３が設けられる。接続パターン２５，３５，４５は、絶縁膜７０を貫通して設けられたビア導体を介してスパイラルパターン１１の外周端に接続され、これらの外表面に端子電極６２が設けられる。接続パターン２６，３６，４６は、絶縁膜７０を貫通して設けられたビア導体を介してスパイラルパターン１２の外周端に接続され、これらの外表面に端子電極６４が設けられる。 The connection patterns 13, 23, and 33 are connected to the outer peripheral end of the spiral pattern 41 via via conductors provided through the insulating film 70, and terminal electrodes 61 are provided on their outer surfaces. The connection patterns 14, 24, and 34 are connected to the outer peripheral end of the spiral pattern 42 via via conductors provided through the insulating film 70, and terminal electrodes 63 are provided on their outer surfaces. The connection patterns 25, 35, and 45 are connected to the outer circumferential ends of the spiral pattern 11 via via conductors provided through the insulating film 70, and terminal electrodes 62 are provided on the outer surfaces thereof. The connection patterns 26, 36, and 46 are connected to the outer peripheral end of the spiral pattern 12 via via conductors provided through the insulating film 70, and terminal electrodes 64 are provided on their outer surfaces.
　図８は、本実施形態によるコイル部品１００を備える回路基板２の構成を説明するための略分解斜視図である。 FIG. 8 is a schematic exploded perspective view for explaining the configuration of the circuit board 2 including the coil component 100 according to the present embodiment.
　図８に示す回路基板２は、基板８０及びこれに搭載されたコイル部品１００を備える。基板８０にはコイル部品１００の搭載領域１００Ａが定義されており、コイル部品１００の実装面５１が搭載領域１００Ａと向かい合うよう、基板８０にコイル部品１００が実装される。基板８０の表面には、互いにＸ方向に隣接し、Ｚ方向に延在する一対の差動信号ライン８１，８２と、電源パッド８３，８４が設けられており、搭載領域１００Ａは、差動信号ライン８１，８２の一部及び電源パッド８３，８４と重なっている。差動信号ライン８１，８２は差動信号を伝送する伝送線路であり、差動信号の対称性を高めるため、両者のＸ方向における離間距離Ｌ０は非常に短い。また、電源パッド８３には電源ラインを介して例えば高位側の電源電位Ｖｃｃが供給され、電源パッド８４には電源ラインを介して例えば低位側の電源電位ＧＮＤ（グランド電位）が供給される。 The circuit board 2 shown in FIG. 8 includes a board 80 and a coil component 100 mounted thereon. A mounting area 100A for the coil component 100 is defined on the board 80, and the coil component 100 is mounted on the board 80 such that the mounting surface 51 of the coil component 100 faces the mounting area 100A. A pair of differential signal lines 81 and 82 that are adjacent to each other in the X direction and extend in the Z direction, and power supply pads 83 and 84 are provided on the surface of the substrate 80. Parts of the lines 81 and 82 and the power supply pads 83 and 84 overlap. The differential signal lines 81 and 82 are transmission lines for transmitting differential signals, and in order to improve the symmetry of the differential signals, the distance L0 between them in the X direction is very short. Further, the power supply pad 83 is supplied with, for example, a higher power supply potential Vcc via a power supply line, and the power supply pad 84 is supplied with, for example, a lower power supply potential GND (ground potential) via a power supply line.
　このような構成を有する基板８０にコイル部品１００を実装すると、端子電極６１，６３がそれぞれ差動信号ライン８１，８２に接続され、端子電極６２，６４がそれぞれ電源パッド８３，８４に接続される。これにより、等価回路図である図９に示すように、差動信号ライン８１と電源回路８５のＶｃｃノードの間にコイルＣ１が挿入され、差動信号ライン８２と電源回路８５のＧＮＤノードの間にコイルＣ２が挿入されることになる。このため、差動信号ライン８１，８２に直流電圧を重畳させることによって電源ラインとしても利用する場合に、差動信号ライン８１，８２に流れる差動信号成分が電源回路８５に流れ込むことがない。 When the coil component 100 is mounted on the substrate 80 having such a configuration, the terminal electrodes 61 and 63 are connected to the differential signal lines 81 and 82, respectively, and the terminal electrodes 62 and 64 are connected to the power supply pads 83 and 84, respectively. . As a result, as shown in FIG. 9 which is an equivalent circuit diagram, the coil C1 is inserted between the differential signal line 81 and the Vcc node of the power circuit 85, and the coil C1 is inserted between the differential signal line 82 and the GND node of the power circuit 85 Coil C2 will be inserted into. Therefore, when the differential signal lines 81 and 82 are used as power supply lines by superimposing a DC voltage on them, the differential signal components flowing through the differential signal lines 81 and 82 do not flow into the power supply circuit 85.
　そして、本実施形態においては、端子電極６１，６３が差動信号ライン８１，８２と重なるよう、差動信号ライン８１，８２に直接接続される。これを実現すべく、端子電極６１，６３の離間距離Ｌ１を十分に狭くし、理想的には差動信号ライン８１，８２の離間距離Ｌ０と同様に設計されている。これにより、差動信号ライン８１，８２から引き出されたランドパターンにコイル部品を接続するケースと比べ、コイル部品１００との接続部におけるインピーダンスの不連続性を低減することが可能となる。しかも、それぞれ差動信号ライン８１，８２に接続される２つのコイルＣ１，Ｃ２を一つのコイル部品１００に集積していることから、部品点数を削減することができるとともに、差動信号ライン８１，８２間の対称性も確保される。これに対し、端子電極６１，６２の離間距離Ｌ２や端子電極６３，６４の離間距離Ｌ３については、離間距離Ｌ１よりも大きいことから、差動信号ライン８１，８２と電源パッド８３，８４との絶縁を十分に確保することが可能となる。 In this embodiment, the terminal electrodes 61 and 63 are directly connected to the differential signal lines 81 and 82 so as to overlap with the differential signal lines 81 and 82. In order to realize this, the distance L1 between the terminal electrodes 61 and 63 is made sufficiently narrow, and is ideally designed to be similar to the distance L0 between the differential signal lines 81 and 82. This makes it possible to reduce impedance discontinuity at the connection with the coil component 100, compared to the case where the coil component is connected to the land pattern drawn out from the differential signal lines 81 and 82. Moreover, since the two coils C1 and C2 connected to the differential signal lines 81 and 82, respectively, are integrated into one coil component 100, the number of components can be reduced, and the differential signal lines 81 and 82 symmetry is also ensured. On the other hand, since the distance L2 between the terminal electrodes 61 and 62 and the distance L3 between the terminal electrodes 63 and 64 are larger than the distance L1, the distance between the differential signal lines 81 and 82 and the power supply pads 83 and 84 is larger than the distance L1. It becomes possible to ensure sufficient insulation.
　また、本実施形態においては、差動信号ライン８１に接続される端子電極６１を始点としたコイルＣ１の巻回方向と、差動信号ライン８２に接続される端子電極６３を始点としたコイルＣ２の巻回方向が互いに逆向きであることから、差動信号ライン８１，８２に流れる相補の信号によって、コイルＣ１，Ｃ２に生じる磁界は同方向となる。これにより、コイルＣ１によって生じる磁界とコイルＣ２によって生じる磁界が打ち消し合うことから、差動信号の信号品質の低下を防止することができる。しかも、コイルＣ１とコイルＣ２の間の一部は絶縁膜７０で満たされており、この領域においてはコイルＣ１とコイルＣ２の間に素体５０が存在しないことから、コイルＣ１とコイルＣ２の結合自体を低減することが可能となる。 Further, in this embodiment, the winding direction of the coil C1 starts from the terminal electrode 61 connected to the differential signal line 81, and the winding direction of the coil C2 starts from the terminal electrode 63 connected to the differential signal line 82. Since the winding directions of the coils C1 and C2 are opposite to each other, the magnetic fields generated in the coils C1 and C2 by complementary signals flowing in the differential signal lines 81 and 82 are in the same direction. As a result, the magnetic field generated by the coil C1 and the magnetic field generated by the coil C2 cancel each other out, making it possible to prevent the signal quality of the differential signal from deteriorating. Moreover, a part between the coil C1 and the coil C2 is filled with the insulating film 70, and since the element body 50 does not exist between the coil C1 and the coil C2 in this region, the coupling between the coil C1 and the coil C2 is prevented. itself can be reduced.
　さらに、電源パッド８３，８４に接続される端子電極６２，６４についてはＬ字型構造を有していることから、ハンダを用いてコイル部品１００を基板８０に実装すると、素体５０の側面５２，５３にハンダのフィレットが形成される。これにより、端子電極６２，６４と電源パッド８３，８４の接続信頼性が高められるだけでなく、コイル部品１００全体の実装信頼性も高められる。 Furthermore, since the terminal electrodes 62 and 64 connected to the power supply pads 83 and 84 have an L-shaped structure, when the coil component 100 is mounted on the board 80 using solder, the side surface 52 of the element body 50 , 53 are formed with solder fillets. This not only improves the connection reliability between the terminal electrodes 62 and 64 and the power supply pads 83 and 84, but also improves the mounting reliability of the coil component 100 as a whole.
　尚、本発明において、端子電極６１，６３のＸ方向におけるピッチと、差動信号ライン８１，８２のＸ方向におけるピッチが完全に一致している必要はなく、差動信号ライン８１，８２の方が端子電極６１，６３よりもＸ方向におけるピッチが狭くても構わない。この場合には、端子電極６１，６３との接続部において差動信号ライン８１，８２のＸ方向における幅を外側にやや拡大し、この部分において差動信号ライン８１，８２のピッチを局所的に拡大することにより、接続信頼性を高めることが可能となる。この場合、ピッチが局所的に拡大された部分においてインピーダンスの不連続性が若干生じるが、この場合であっても、端子電極６１，６３が差動信号ライン８１，８２と重なるよう、差動信号ライン８１，８２に直接接続されることから、インピーダンスの不連続性を最小限に抑えることが可能となる。 In the present invention, it is not necessary that the pitch of the terminal electrodes 61, 63 in the X direction and the pitch of the differential signal lines 81, 82 in the X direction completely match; It does not matter if the pitch in the X direction is narrower than that of the terminal electrodes 61 and 63. In this case, the width of the differential signal lines 81, 82 in the X direction is slightly expanded outward at the connection portion with the terminal electrodes 61, 63, and the pitch of the differential signal lines 81, 82 is locally adjusted in this portion. By expanding it, it becomes possible to improve connection reliability. In this case, some impedance discontinuity occurs in the part where the pitch is locally expanded, but even in this case, the terminal electrodes 61 and 63 overlap the differential signal lines 81 and 82 so that the differential signal Since it is directly connected to lines 81 and 82, impedance discontinuity can be minimized.
　図１０は、本発明の第２の実施形態によるコイル部品２００の外観を示す略透視斜視図である。 FIG. 10 is a schematic perspective view showing the appearance of a coil component 200 according to the second embodiment of the present invention.
　図１０に示すように、第２の実施形態によるコイル部品２００は、素体５０に埋め込まれたコイルＣ３をさらに備える点において、第１の実施形態によるコイル部品１００と相違している。その他の基本的な構成は、第１の実施形態によるコイル部品１００と同一であることから、同一の要素には同一の符号を付し、重複する説明は省略する。 As shown in FIG. 10, the coil component 200 according to the second embodiment is different from the coil component 100 according to the first embodiment in that it further includes a coil C3 embedded in the element body 50. Since the other basic configurations are the same as the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted.
　コイルＣ３は、コイルＣ１，Ｃ２のＹ方向における上方に配置される。コイルＣ３はＺ方向を軸方向とし、その径はコイルＣ１，Ｃ２の径よりも大きい。コイルＣ３の一端は端子電極６１に接続され、コイルＣ３の他端は端子電極６３に接続される。 Coil C3 is arranged above coils C1 and C2 in the Y direction. The axial direction of the coil C3 is the Z direction, and its diameter is larger than the diameters of the coils C1 and C2. One end of the coil C3 is connected to the terminal electrode 61, and the other end of the coil C3 is connected to the terminal electrode 63.
　本実施形態によるコイル部品２００を図８に示した基板８０に実装すると、等価回路図である図１１に示すように、差動信号ライン８１，８２間にコイルＣ３が挿入されることになる。これにより、差動信号ライン８１，８２間に所定のインダクタンス成分を付加することが可能となる。しかも、コイルＣ３は、コイルＣ１，Ｃ２のＹ方向における上方に配置されていることから、第１の実施形態によるコイル部品１００に対して実装面積が増加することもない。尚、コイルＣ１，Ｃ２とコイルＣ３のＹ方向における位置は逆であっても構わない。 When the coil component 200 according to this embodiment is mounted on the board 80 shown in FIG. 8, the coil C3 will be inserted between the differential signal lines 81 and 82, as shown in FIG. 11 which is an equivalent circuit diagram. This makes it possible to add a predetermined inductance component between the differential signal lines 81 and 82. Moreover, since the coil C3 is arranged above the coils C1 and C2 in the Y direction, the mounting area does not increase compared to the coil component 100 according to the first embodiment. Note that the positions of the coils C1 and C2 and the coil C3 in the Y direction may be reversed.
　図１２は、本発明の第３の実施形態によるコイル部品３００の外観を示す略透視斜視図である。 FIG. 12 is a schematic perspective view showing the appearance of a coil component 300 according to the third embodiment of the present invention.
　図１２に示すように、第３の実施形態によるコイル部品３００は、素体５０に埋め込まれたコイルＣ４，Ｃ５をさらに備える点において、第１の実施形態によるコイル部品１００と相違している。その他の基本的な構成は、第１の実施形態によるコイル部品１００と同一であることから、同一の要素には同一の符号を付し、重複する説明は省略する。 As shown in FIG. 12, the coil component 300 according to the third embodiment is different from the coil component 100 according to the first embodiment in that it further includes coils C4 and C5 embedded in the element body 50. Since the other basic configurations are the same as the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted.
　コイルＣ４はコイルＣ１のＹ方向における上方に配置され、コイルＣ５はコイルＣ２のＹ方向における上方に配置される。コイルＣ４，Ｃ５はいずれもＺ方向を軸方向とし、その径はコイルＣ１，Ｃ２の径と同じである。コイルＣ４の一端及び他端は、コイルＣ１と同様、端子電極６１，６２にそれぞれ接続される。コイルＣ５の一端及び他端は、コイルＣ２と同様、端子電極６３，６４にそれぞれ接続される。 The coil C4 is arranged above the coil C1 in the Y direction, and the coil C5 is arranged above the coil C2 in the Y direction. The axial direction of both the coils C4 and C5 is the Z direction, and the diameter thereof is the same as the diameter of the coils C1 and C2. One end and the other end of the coil C4 are connected to terminal electrodes 61 and 62, respectively, similarly to the coil C1. One end and the other end of the coil C5 are connected to terminal electrodes 63 and 64, respectively, similarly to the coil C2.
　本実施形態によるコイル部品３００を図８に示した基板８０に実装すると、等価回路図である図１３に示すように、差動信号ライン８１と電源回路８５のＶｃｃノードの間にコイルＣ１，Ｃ４が並列に挿入され、差動信号ライン８２と電源回路８５のＧＮＤノードの間にコイルＣ２，Ｃ５が並列に挿入されることになる。これにより、差動信号ライン８１，８２と電源回路８５の間の直流抵抗を低減することが可能となる。しかも、コイルＣ４，Ｃ５は、コイルＣ１，Ｃ２のＹ方向における上方に配置されていることから、第１の実施形態によるコイル部品１００に対して実装面積が増加することもない。尚、コイルＣ１，Ｃ２とコイルＣ４，Ｃ５のＹ方向における位置は逆であっても構わない。 When the coil component 300 according to this embodiment is mounted on the board 80 shown in FIG. 8, the coils C1 and C4 are connected between the differential signal line 81 and the Vcc node of the power supply circuit 85, as shown in FIG. are inserted in parallel, and coils C2 and C5 are inserted in parallel between the differential signal line 82 and the GND node of the power supply circuit 85. This makes it possible to reduce the DC resistance between the differential signal lines 81 and 82 and the power supply circuit 85. Moreover, since the coils C4 and C5 are arranged above the coils C1 and C2 in the Y direction, the mounting area does not increase compared to the coil component 100 according to the first embodiment. Note that the positions of the coils C1, C2 and the coils C4, C5 in the Y direction may be reversed.
　或いは、コイルＣ１，Ｃ４を直列に接続し、コイルＣ２，Ｃ５を直列に接続しても構わない。これによれば、差動信号ライン８１，８２と電源回路８５の間のインダクタンスを大きくすることが可能となる。 Alternatively, the coils C1 and C4 may be connected in series, and the coils C2 and C5 may be connected in series. According to this, it becomes possible to increase the inductance between the differential signal lines 81 and 82 and the power supply circuit 85.
　図１４は、本発明の第４の実施形態によるコイル部品４００の構成を説明するための略断面図である。 FIG. 14 is a schematic cross-sectional view for explaining the configuration of a coil component 400 according to the fourth embodiment of the present invention.
　図１４に示すように、第４の実施形態によるコイル部品４００は、コイルＣ１，Ｃ２が別部品として作製され、これらが絶縁部材７１によって一体化されている点において、第１の実施形態によるコイル部品１００と相違している。その他の基本的な構成は、第１の実施形態によるコイル部品１００と同一であることから、同一の要素には同一の符号を付し、重複する説明は省略する。このような構成を有するコイル部品４００は、模式図である図１５に示すように、コイルＣ１及びＬ字型構造を有する端子電極６１，６２を有するチップ４０１と、コイルＣ２及びＬ字型構造を有する端子電極６３，６４を有するチップ４０２を容易し、実装面５１から端子電極６１～６４が露出するよう、絶縁部材７１によって一体化することによって作製することが可能である。また、コイルＣ１，Ｃ２の軸方向と実装面との関係についても特に限定されず、コイルＣ１，Ｃ２の軸方向がいずれも実装面に対して水平であっても構わないし、コイルＣ１，Ｃ２の軸方向がいずれも実装面に対して垂直であっても構わないし、コイルＣ１の軸方向が実装面に対して水平であり、コイルＣ２の軸方向が実装面に対して垂直であっても構わない。 As shown in FIG. 14, the coil component 400 according to the fourth embodiment is different from the coil according to the first embodiment in that the coils C1 and C2 are manufactured as separate parts and are integrated by an insulating member 71. It is different from part 100. Since the other basic configurations are the same as the coil component 100 according to the first embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted. As shown in the schematic diagram of FIG. 15, the coil component 400 having such a configuration includes a chip 401 having a coil C1 and terminal electrodes 61, 62 having an L-shaped structure, and a coil C2 having an L-shaped structure. A chip 402 having terminal electrodes 63 and 64 can be fabricated by integrating the chip 402 with an insulating member 71 so that the terminal electrodes 61 to 64 are exposed from the mounting surface 51. Further, the relationship between the axial direction of the coils C1 and C2 and the mounting surface is not particularly limited, and the axial direction of the coils C1 and C2 may both be horizontal to the mounting surface, or the axial direction of the coils C1 and C2 may be horizontal to the mounting surface. It does not matter if both axial directions are perpendicular to the mounting surface, or the axial direction of the coil C1 may be horizontal to the mounting surface, and the axial direction of the coil C2 may be perpendicular to the mounting surface. do not have.
　以上、本発明の好ましい実施形態について説明したが、本発明は、上記の実施形態に限定されることなく、本発明の主旨を逸脱しない範囲で種々の変更が可能であり、それらも本発明の範囲内に包含されるものであることはいうまでもない。 Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention. Needless to say, it is included within the scope.
２　　回路基板
１０，２０，３０，４０　　導体層
１１，１２，２１，２２，３１，３２，４１，４２　　スパイラルパターン
１３，１４，２３～２６，３３～３６，４５，４６　　接続パターン
５０　　素体
５１　　実装面
５２，５３　　側面
６１～６４　　端子電極
７０　　絶縁膜
７１　　絶縁部材
８０　　基板
８１，８２　　差動信号ライン
８３，８４　　電源パッド
８５　　電源回路
１００，２００，３００，４００　　コイル部品
１００Ａ　　搭載領域
４０１，４０２　　チップ
Ｃ１～Ｃ５　　コイル 2 Circuit board 10, 20, 30, 40 Conductor layer 11, 12, 21, 22, 31, 32, 41, 42 Spiral pattern 13, 14, 23 to 26, 33 to 36, 45, 46 Connection pattern 50 Element body 51 Mounting surfaces 52, 53 Side surfaces 61 to 64 Terminal electrode 70 Insulating film 71 Insulating member 80 Substrate 81, 82 Differential signal lines 83, 84 Power supply pad 85 Power supply circuit 100, 200, 300, 400 Coil component 100A Mounting area 401, 402 Chip C1~C5 coil

Claims (10)

  1. 　磁性材料を含む素体と、
    　前記素体に埋め込まれ、第１の方向を軸方向とし、前記第１の方向と直交する第２の方向に配列された第１及び第２のコイルと、
    　前記第１のコイルの一端及び他端にそれぞれ接続された第１及び第２の端子電極と、
    　前記第２のコイルの一端及び他端にそれぞれ接続された第３及び第４の端子電極と、を備え、
    　前記第２、第１、第３及び第４の端子電極は、前記素体の実装面から露出し、且つ、この順に前記第２の方向に配列され、
    　前記第１コイルと前記第２のコイルの間には、前記磁性材料の存在しない領域が含まれることを特徴とするコイル部品。     an element body containing a magnetic material;
    first and second coils embedded in the element body and arranged in a second direction orthogonal to the first direction, with the first direction being the axial direction;
    first and second terminal electrodes connected to one end and the other end of the first coil, respectively;
    third and fourth terminal electrodes connected to one end and the other end of the second coil, respectively;
    The second, first, third and fourth terminal electrodes are exposed from the mounting surface of the element body and are arranged in this order in the second direction,
    A coil component characterized in that a region where the magnetic material does not exist is included between the first coil and the second coil.
  2. 　前記第１の端子電極と前記第３の端子電極の離間距離は、前記第１の端子電極と前記第２の端子電極の離間距離、並びに、前記第３の端子電極と前記第４の端子電極の離間距離よりも小さいことを特徴とする請求項１に記載のコイル部品。 The distance between the first terminal electrode and the third terminal electrode is equal to the distance between the first terminal electrode and the second terminal electrode, and the distance between the third terminal electrode and the fourth terminal electrode. The coil component according to claim 1, characterized in that the separation distance is smaller than the separation distance of the coil component.
  3. 　前記実装面は、前記第１及び第２の方向に延在することを特徴とする請求項１又は２に記載のコイル部品。 The coil component according to claim 1 or 2, wherein the mounting surface extends in the first and second directions.
  4. 　前記素体は、前記第２の方向に対して垂直であり、互いに反対側に位置する第１及び第２の側面をさらに有し、
    　前記第２の端子電極は、前記第１の側面からさらに露出し、
    　前記第４の端子電極は、前記第２の側面からさらに露出することを特徴とする請求項３に記載のコイル部品。     The element body further has first and second side surfaces that are perpendicular to the second direction and located opposite to each other,
    the second terminal electrode is further exposed from the first side surface,
    The coil component according to claim 3, wherein the fourth terminal electrode is further exposed from the second side surface.
  5. 　前記第１の端子電極を始点とし、前記第２の端子電極を終点とした場合における前記第１のコイルの巻回方向と、前記第３の端子電極を始点とし、前記第４の端子電極を終点とした場合における前記第２のコイルの巻回方向は、互いに逆向きであることを特徴とする請求項１乃至４のいずれか一項に記載のコイル部品。 The winding direction of the first coil when the first terminal electrode is the starting point and the second terminal electrode is the ending point, and the third terminal electrode is the starting point and the fourth terminal electrode is the winding direction. The coil component according to any one of claims 1 to 4, wherein the winding directions of the second coil at the end point are opposite to each other.
  6. 　前記素体に埋め込まれ、一端及び他端がそれぞれ前記第１及び第３の端子電極に接続された第３のコイルをさらに備えることを特徴とする請求項１乃至５のいずれか一項に記載のコイル部品。 6. The coil according to claim 1, further comprising a third coil embedded in the element body and having one end and the other end connected to the first and third terminal electrodes, respectively. coil parts.
  7. 　前記第１及び第２のコイルと前記第３のコイルは、前記第１及び第２の方向と直交する第３の方向に配列されていることを特徴とする請求項６に記載のコイル部品。 The coil component according to claim 6, wherein the first and second coils and the third coil are arranged in a third direction orthogonal to the first and second directions.
  8. 　前記素体に埋め込まれ、一端及び他端がそれぞれ前記第１及び第２の端子電極に接続された第３のコイルと、
    　前記素体に埋め込まれ、一端及び他端がそれぞれ前記第３及び第４の端子電極に接続された第４のコイルと、をさらに備えることを特徴とする請求項１乃至５のいずれか一項に記載のコイル部品。     a third coil embedded in the element body and having one end and the other end connected to the first and second terminal electrodes, respectively;
    6. The coil according to claim 1, further comprising a fourth coil embedded in the element body and having one end and the other end connected to the third and fourth terminal electrodes, respectively. Coil parts listed in.
  9. 　前記第１のコイルと前記第３のコイルは、前記第１及び第２の方向と直交する第３の方向に配列され、
    　前記第２のコイルと前記第４のコイルは、前記第３の方向に配列されていることを特徴とする請求項８に記載のコイル部品。     The first coil and the third coil are arranged in a third direction orthogonal to the first and second directions,
    The coil component according to claim 8, wherein the second coil and the fourth coil are arranged in the third direction.
  10. 　請求項１乃至９のいずれか一項に記載のコイル部品と、
    　前記コイル部品が実装された基板と、を備え、
    　前記基板は、前記第１の方向に延在する第１及び第２の差動信号ラインと、第１の電源電位が供給される第１の電源パッドと、前記第１の電源電位とは異なる第２の電源電位が供給される第２の電源パッドとを有し、
    　前記コイル部品は、前記第１及び第３の端子電極がそれぞれ前記第１及び第２の差動信号ラインに接続され、前記第２及び第４の端子電極がそれぞれ前記第１及び第２の電源パッドに接続されるよう、前記基板に実装されていることを特徴とする回路基板。     The coil component according to any one of claims 1 to 9,
    A board on which the coil component is mounted,
    The substrate has first and second differential signal lines extending in the first direction, a first power supply pad to which a first power supply potential is supplied, and the first power supply potential is different from the first power supply potential. a second power supply pad to which a second power supply potential is supplied;
    In the coil component, the first and third terminal electrodes are connected to the first and second differential signal lines, respectively, and the second and fourth terminal electrodes are connected to the first and second power sources, respectively. A circuit board, characterized in that the circuit board is mounted on the board so as to be connected to a pad.
PCT/JP2022/031836 2022-03-29 2022-08-24 Coil component and circuit board including same WO2023188452A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01266705A (en) * 1988-04-18 1989-10-24 Sony Corp Coil part
JPH06112047A (en) * 1992-09-26 1994-04-22 Taiyo Yuden Co Ltd Laminated ceramic inductor and manufacture thereof
WO2004055841A1 (en) * 2002-12-13 2004-07-01 Matsushita Electric Industrial Co., Ltd. Multiple choke coil and electronic equipment using the same
JP2004311760A (en) * 2003-04-08 2004-11-04 Matsushita Electric Ind Co Ltd Coil component
JP2018050015A (en) * 2016-09-23 2018-03-29 株式会社村田製作所 Inductor component and manufacturing method thereof
JP2019047165A (en) * 2017-08-29 2019-03-22 株式会社Ｓｏｋｅｎ Differential communication device
JP2019192762A (en) * 2018-04-24 2019-10-31 Tdk株式会社 Coil device
JP2021103703A (en) * 2019-12-24 2021-07-15 Tdk株式会社 Coil component

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01266705A (en) * 1988-04-18 1989-10-24 Sony Corp Coil part
JPH06112047A (en) * 1992-09-26 1994-04-22 Taiyo Yuden Co Ltd Laminated ceramic inductor and manufacture thereof
WO2004055841A1 (en) * 2002-12-13 2004-07-01 Matsushita Electric Industrial Co., Ltd. Multiple choke coil and electronic equipment using the same
JP2004311760A (en) * 2003-04-08 2004-11-04 Matsushita Electric Ind Co Ltd Coil component
JP2018050015A (en) * 2016-09-23 2018-03-29 株式会社村田製作所 Inductor component and manufacturing method thereof
JP2019047165A (en) * 2017-08-29 2019-03-22 株式会社Ｓｏｋｅｎ Differential communication device
JP2019192762A (en) * 2018-04-24 2019-10-31 Tdk株式会社 Coil device
JP2021103703A (en) * 2019-12-24 2021-07-15 Tdk株式会社 Coil component

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