JP2019140223A - Coil component - Google Patents

Abstract

To restrain increase of the alternating-current resistance resulting from unbalance of capacity component, in a coil component formed by laminating multiple spiral coil parts.SOLUTION: A coil component includes coil parts 100, 300 having outer peripheral ends commonly connected with a terminal electrode E1, and coil parts 200, 400 having outer peripheral ends commonly connected with a terminal electrode E2. Inner peripheral end of the coil part 100 is connected with the inner peripheral end of the coil part 200, inner peripheral end of the coil part 300 is connected with the inner peripheral end of the coil part 400. The coil parts 100, 300 are sandwiched by the coil parts 200, 400. Since the capacity components occurring in the coil parts 100, 300 connected in parallel almost match, and the capacity components occurring in the coil parts 200, 400 connected in parallel almost match, increase in the alternating-current resistance resulting from unbalance of capacity components is restrained. With such an arrangement, a coil component having a low alternating-current resistance can be provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a coil component, and more particularly to a coil component having a spiral planar conductor.

  As coil components used in various electronic devices, in addition to a coil component in which a wire (coated conductor) is wound around a magnetic core, a spiral planar conductor is formed on the surface of an insulating substrate over a plurality of turns. Coil parts are known. For example, in Patent Document 1, spiral coil portions are formed on the surfaces of four insulating substrates, the outer peripheral ends of the first layer and the second layer coil portions are short-circuited, and the third layer and the fourth layer. The structure which short-circuited the outer peripheral end of this coil part, and also short-circuited all the inner peripheral ends of the coil part of the 1st-4th layer is disclosed (refer FIG. 2 of patent document 1). Further, in Patent Document 1, the outer peripheral ends of the coil portions of the first layer and the third layer are short-circuited, the outer peripheral ends of the coil portions of the second layer and the fourth layer are short-circuited, and further, the first layer and the first layer A configuration is also disclosed in which the inner peripheral ends of the two-layer coil portions are short-circuited and the inner peripheral ends of the third-layer and fourth-layer coil portions are short-circuited (see FIG. 6 of Patent Document 1).

JP 2008-205215 A

  However, the coil component described in Patent Document 1 is caused by the fact that the characteristics of two coil parts connected in parallel (for example, the coil parts of the first layer and the second layer in FIG. 2) do not match. As a result, there was a problem that the AC resistance increased. For example, paying attention to the configuration of FIG. 2 of Patent Document 1, for the first layer coil part, the other coil part is adjacent to only one side, while for the second layer coil part, the other coil part is adjacent to both sides. For this reason, an unbalance occurs in the capacitance components of the coil portion of the first layer and the coil portion of the second layer, which causes the AC resistance to deteriorate.

  Accordingly, an object of the present invention is to suppress an increase in AC resistance due to an unbalance of capacitance components in a coil component in which a plurality of spiral coil portions are stacked.

  The coil component according to the present invention is wound in a spiral shape over a plurality of turns with the first and second terminal electrodes, and the first and third outer ends are commonly connected to the first terminal electrode. And a second coil portion wound in a spiral shape over a plurality of turns and each of which has an outer peripheral end commonly connected to the second terminal electrode. The inner peripheral end of the first coil portion is connected to the inner peripheral end of the second coil portion, the inner peripheral end of the third coil portion is connected to the inner peripheral end of the fourth coil portion, and the first to fourth coil portions. Is characterized in that the first and third coil portions are arranged to overlap each other so as to be sandwiched between the second coil portion and the fourth coil portion.

  According to the present invention, the capacitance components generated in the first coil portion and the third coil portion connected in parallel substantially coincide with each other, and the capacitance generated in the second coil portion and the fourth coil portion connected in parallel. Since the components substantially coincide with each other, an increase in AC resistance due to the unbalance of the capacitive components is suppressed. As a result, it is possible to provide a coil component having a low AC resistance.

  A coil component according to the present invention includes a first insulating substrate having a first surface and a second surface located on the opposite side of the first surface, and a third surface facing the first surface of the first insulating substrate. A second insulating substrate having a fourth surface located opposite to the surface and the third surface, the first coil portion being formed on the first surface of the first insulating substrate; The coil portion is formed on the second surface of the first insulating substrate, the third coil portion is formed on the third surface of the second insulating substrate, and the fourth coil portion is formed on the second surface of the second insulating substrate. An inner peripheral end of the first coil portion and an inner peripheral end of the second coil portion formed on the fourth surface of the insulating substrate are connected to the first connecting portion provided through the first insulating substrate. The inner peripheral end of the third coil portion and the inner peripheral end of the fourth coil portion are connected to each other through the second insulating substrate. It may be connected to each other via the part. According to this, it is possible to support the first to fourth coil portions using two insulating substrates.

  In the present invention, each of the first to fourth coil portions may include at least first and second conductor portions separated in a radial direction by a spiral slit. According to this, since the unevenness of the current density is reduced, it becomes possible to further reduce the DC resistance and the AC resistance.

  In this invention, a 1st conductor part is located in an outer peripheral side rather than a 2nd conductor part, and the inner peripheral end of the 1st conductor part of a 1st coil part is the 2nd of a 2nd coil part. The third coil is connected to the inner peripheral end of the first conductor portion of the second coil portion, and is connected to the inner peripheral end of the first conductor portion of the second coil portion. The inner peripheral end of the first conductor portion of the second coil portion is connected to the inner peripheral end of the second conductor portion of the fourth coil portion, and the inner peripheral end of the second conductor portion of the third coil portion is You may connect to the inner peripheral end of the 1st conductor part of 4 coil parts. According to this, since the current density distribution of the conductor portion located on the inner peripheral side and the conductor portion located on the outer peripheral side is made uniform, the direct current resistance and the alternating current resistance can be further reduced.

  The coil component according to the present invention is wound in a spiral shape over a plurality of turns, and is wound in a spiral shape over a plurality of turns, with a fifth coil portion having an outer peripheral end connected to the first terminal electrode, A sixth coil portion having an outer peripheral end connected to the second terminal electrode, and the fifth and sixth coil portions overlap the first to fourth coil portions, and The inner peripheral end may be connected to the inner peripheral end of the sixth coil portion. According to this, the direct current resistance and the alternating current resistance can be further reduced, and a larger inductance can be obtained.

  In the present invention, the first coil portion and the third coil portion have the same pattern shape in plan view, and the second coil portion and the fourth coil portion may have the same pattern shape in plan view. I do not care. According to this, the capacitance components of the first coil portion and the third coil portion are almost completely matched, and the capacitance components of the second coil portion and the fourth coil portion are almost perfectly matched. Thus, it is possible to provide a coil component having a lower AC resistance.

  In the present invention, the first to fourth coil portions may have a circumferential region where the radial position does not change and a transition region where the radial position changes. According to this, compared with the case where it is made into the spiral shape from which the radial direction position of a conductor pattern changes gradually, pattern design and pattern change become easy.

  In the present invention, the circumferential positions of the first and second coil portions may coincide with each other in the planar position, and the circumferential areas of the third and fourth coil portions may coincide with each other in the planar position. According to this, when the first and second insulating substrates are transparent or translucent, the appearance inspection becomes easy.

  As described above, according to the present invention, in the coil component in which a plurality of spiral coil portions are stacked, the imbalance of the capacitance component between the two coil portions connected in parallel is reduced. The increase can be suppressed.

FIG. 1 is a cross-sectional view showing a configuration of a coil component 10 according to the first embodiment of the present invention. FIG. 2 is a plan view for explaining the pattern shape of the first coil unit 100, and shows a state viewed from the surface S 1 side of the insulating substrate 11. FIG. 3 is a plan view for explaining the pattern shape of the second coil unit 200, and shows a state viewed from the surface S2 side of the insulating substrate 11. FIG. FIG. 4 is a schematic perspective view of the first to fourth coil portions 100, 200, 300, 400. FIG. 5 is an enlarged perspective view for explaining the layout of the connecting portions TH1 to TH4. FIG. 6 is an equivalent circuit diagram of the coil component 10. FIG. 7 is a circuit diagram for explaining a capacitance component generated in the coil component 10. FIG. 8 is a circuit diagram for explaining a capacitance component generated in the coil component according to the comparative example. FIG. 9 is a graph showing the frequency characteristics of the coil component 10. FIG. 10 is a schematic cross-sectional view for explaining the configuration of the coil component 20 according to the second embodiment of the present invention. FIG. 11 is a schematic cross-sectional view for explaining the configuration of the coil component 30 according to the third embodiment of the present invention. FIG. 12 is a schematic cross-sectional view for explaining the configuration of the coil component 40 according to the fourth embodiment of the present invention. FIG. 13: is typical sectional drawing for demonstrating the structure of the coil component 50 by the 5th Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>
FIG. 1 is a cross-sectional view showing a configuration of a coil component 10 according to the first embodiment of the present invention.

  As shown in FIG. 1, the coil component 10 according to the present embodiment includes the first and second insulating substrates 11, 12, the first coil portion 100 formed on one surface S <b> 1 of the insulating substrate 11, and the insulation. The second coil part 200 formed on the other surface S2 of the substrate 11, the third coil part 300 formed on one surface S3 of the insulating substrate 12, and the other surface S4 of the insulating substrate 12 are formed. 4th coil part 400 is provided. The first insulating substrate 11 and the second insulating substrate 12 are arranged such that the surface S1 of the insulating substrate 11 and the surface S3 of the insulating substrate 12 face each other. Although the details will be described later, the inner peripheral end of the first coil unit 100 and the inner peripheral end of the second coil unit 200 are connected to each other via a plurality of connecting portions TH provided through the insulating substrate 11. The inner peripheral end of the third coil unit 300 and the inner peripheral end of the fourth coil unit 400 are connected to each other through a plurality of connection portions TH provided so as to penetrate the insulating substrate 12.

  The material of the insulating substrates 11 and 12 is not particularly limited, but a transparent or translucent flexible material such as PET resin can be used. The insulating substrates 11 and 12 may be flexible substrates in which a glass cloth is impregnated with an epoxy resin. When the insulating substrates 11 and 12 are transparent or translucent, the first coil unit 100 and the second coil unit 200, or the third coil unit 300 and the fourth coil unit 400 appear to overlap each other in plan view. Therefore, depending on how they overlap, appearance inspection using an inspection device becomes difficult. Although details will be described later, the coil component 10 according to the present embodiment is configured so that most of the first coil unit 100 and the second coil unit 200 or the third coil unit 200 can be correctly executed so that an appearance inspection using an inspection apparatus can be correctly performed. Most of the coil part 300 and the fourth coil part 400 are arranged at positions where they overlap each other in plan view.

  FIG. 2 is a plan view for explaining the pattern shape of the first coil unit 100, and shows a state viewed from the surface S 1 side of the insulating substrate 11.

  As shown in FIG. 2, the first coil unit 100 is constituted by a planar conductor wound in a spiral shape over a plurality of turns. In the example illustrated in FIG. 2, the first coil unit 100 has a five-turn configuration including the turns 110 to 150, the turn 110 is located on the outermost periphery, and the turn 150 is located on the innermost periphery. Each turn 110 to 150 is divided into four in the radial direction by three spiral slits. Accordingly, the turns 110 to 150 include the conductor portions 111 to 151 located on the outermost peripheral side, the conductor portions 112 to 152 located second on the outer circumferential side, and the conductor portions 113 to 152 located second on the inner circumferential side. 153 and the conductor portions 115 to 154 located on the innermost peripheral side.

  The conductor portions 111 to 114 of the turn 110 located on the outermost periphery are commonly connected to the terminal electrode E1a. On the other hand, the conductor portions 151 to 154 of the turn 150 located on the innermost periphery are connected to the connection portions TH1 to TH4, respectively. Each of the turns 110 to 150 constituting the first coil unit 100 has a circumferential area A1 in which the position in the radial direction does not change and a transition area B1 in which the position in the radial direction transitions. Five turns consisting of turns 110 to 150 are defined as boundaries.

  Although not shown, the pattern shape of the third coil portion 300 viewed from the surface S3 side of the insulating substrate 12 has a shape that is the reverse of the pattern shape of the first coil portion 100 viewed from the surface S1 side of the insulating substrate 11. doing. For this reason, the pattern shape of the 1st coil part 100 and the 3rd coil part 300 becomes mutually the same in planar view seen from the lamination direction.

  FIG. 3 is a plan view for explaining the pattern shape of the second coil unit 200, and shows a state viewed from the surface S2 side of the insulating substrate 11. FIG.

  As shown in FIG. 3, the second coil part 200 is constituted by a planar conductor wound in a spiral shape over a plurality of turns. In the example illustrated in FIG. 3, the second coil unit 200 has a five-turn configuration including the turns 210 to 250, the turn 210 is located on the outermost periphery, and the turn 250 is located on the innermost periphery. Each turn 210 to 250 is divided into four in the radial direction by three spiral slits. Accordingly, the turns 210 to 250 include the conductor portions 211 to 251 located on the outermost peripheral side, the conductor portions 212 to 252 located on the second outer peripheral side, and the conductor portions 213 located on the second inner peripheral side. 253 and conductor portions 214 to 254 located on the innermost peripheral side.

  The conductor portions 211 to 214 of the turn 210 located on the outermost periphery are commonly connected to the terminal electrode E2a. On the other hand, the conductor portions 251 to 254 of the turn 250 located on the innermost periphery are connected to the connection portions TH4 to TH1, respectively. Each turn 210-250 which comprises the 2nd coil part 200 has circumferential region A2 in which the position in radial direction does not change, and transition region B2 in which the position in radial direction changes, This transition region B2 is used. As a boundary, five turns including turn 210 to turn 250 are defined.

  Although not shown, the pattern shape of the fourth coil portion 400 viewed from the surface S4 side of the insulating substrate 12 has a shape that is the reverse of the pattern shape of the second coil portion 200 viewed from the surface S2 side of the insulating substrate 11. doing. For this reason, the pattern shape of the 2nd coil part 200 and the 4th coil part 400 becomes mutually the same in planar view seen from the lamination direction.

  FIG. 4 is a schematic perspective view of the first to fourth coil portions 100, 200, 300, 400.

  As shown in FIG. 4, the first coil unit 100 and the second coil unit 200 are laid out so that the planar positions of the circumferential region A1 and the circumferential region A2 substantially coincide. Specifically, the circumferential area A1 of the turns 110 to 150 constituting the first coil part 100 is laid out so as to overlap with the circumferential area A2 of the turns 210 to 250 constituting the second coil part 200, respectively. The The same applies to the third coil unit 300 and the fourth coil unit 400.

  Further, the terminal electrode E1a of the first coil unit 100 and the terminal electrode E1b of the third coil unit 300 are arranged at positions overlapping each other in plan view, and both are short-circuited. Similarly, the terminal electrode E2a of the second coil unit 200 and the terminal electrode E2b of the fourth coil unit 400 are arranged at positions overlapping each other in plan view, and both are short-circuited.

  FIG. 5 is an enlarged perspective view for explaining the layout of the connecting portions TH1 to TH4.

  As shown in FIG. 5, the inner peripheral ends of the conductor portions 151, 152, 153, and 154 constituting the turn 150 of the first coil portion 100 are connected to the second through the connection portions TH1, TH2, TH3, and TH4, respectively. Are connected to the inner peripheral ends of the conductor portions 254, 253, 252 and 251 constituting the turn 250 of the coil portion 200. That is, the conductor portion 151 located on the outermost side is connected to the conductor portion 254 located on the innermost side, and the conductor portion 152 located second on the outermost side is secondly located on the inner side. , The second conductor portion 153 located on the inner circumference side is connected to the second conductor portion 252 located on the outer circumference side, and the conductor portion 154 located on the innermost circumference side is located on the outermost side. Connected to portion 251. As a result, the conductor portions 111 to 151 of the first coil portion 100 are connected to the conductor portions 214 to 254 of the second coil portion 200, and the conductor portions 112 to 152 of the first coil portion 100 are the second coil portions. The conductor portions 113 to 153 of the first coil portion 100 are connected to the conductor portions 212 to 252 of the second coil portion 200, and the conductor portions 114 of the first coil portion 100 are connected. ˜154 are connected to the conductor portions 211 to 251 of the second coil part 200.

  Although not shown in the drawing, the innermost turn of the third coil unit 300 and the innermost turn of the fourth coil unit 400 are also connected via four connecting portions, as in the first and second coil units 100 and 200. Connected to each other. As a result, the inner / outer circumferential difference is canceled between the first coil unit 100 and the second coil unit 200, and the inner / outer circumferential difference is canceled between the third coil unit 300 and the fourth coil unit 400. The As a result, since the current density distribution is made more uniform, it is possible to reduce the direct current resistance and the alternating current resistance.

  With this configuration, as shown in FIG. 6, the first coil unit 100 and the second coil unit 200 are connected in series, the third coil unit 300 and the fourth coil unit 400 are connected in series, and The 1st and 2nd coil parts 100 and 200 and the 3rd and 4th coil parts 300 and 400 are connected in parallel. The terminal electrodes E1a and E1b are short-circuited to configure the terminal electrode E1, and the terminal electrodes E2a and E2b are short-circuited to configure the terminal electrode E2.

  In the present embodiment, the second coil unit 200, the first coil unit 100, the third coil unit 300, and the fourth coil unit 400 are laminated in this order. Capacitance components Cp1 to Cp3 shown in FIG. Here, the capacitive component Cp1 is a capacitive component formed by the first coil unit 100 and the second coil unit 200, and the capacitive component Cp2 is formed by the third coil unit 300 and the fourth coil unit 400. The capacitance component Cp3 is a capacitance component formed by the first coil unit 100 and the third coil unit 300. The values of the capacitive component Cp1 and the capacitive component Cp2 are the same.

  In the present embodiment, the outermost second coil part 200 and the fourth coil part 400 are connected to the same terminal electrode E2, and are sandwiched between the second coil part 200 and the fourth coil part 400. Since the first coil unit 100 and the third coil unit 300 are connected to the same terminal electrode E1, the capacitance component (Cp1 + Cp3) generated in the first coil unit 100 and the third coil unit 300 are generated. The capacitance component (Cp2 + Cp3) matches, and the capacitance component (Cp1) generated in the second coil unit 200 and the capacitance component (Cp2) generated in the fourth coil unit 400 match. As a result, the condition of the current path passing through the first and second coil units 100 and 200 matches the condition of the current path passing through the third and fourth coil units 300 and 400, thereby reducing the AC resistance. It becomes possible.

  On the other hand, when the first to fourth coil units 100, 200, 300, and 400 are connected as shown in FIG. 8, the capacitance components of the first coil unit 100 and the third coil unit 300 become inconsistent, and Since the capacitive components of the second coil unit 200 and the fourth coil unit 400 are inconsistent, the AC resistance increases due to the unbalance of the capacitive components. Since the coil component 10 according to the present embodiment eliminates such a problem, it is possible to obtain a lower AC resistance.

  FIG. 9 is a graph showing the frequency characteristics of the coil component. The solid line shows the impedance when the connection shown in FIG. 7 is performed, and the broken line shows the impedance when the connection shown in FIG. 8 is made. As shown in FIG. 9, it can be seen that the resonance frequency is higher when the connection shown in FIG. 7 is made than when the connection shown in FIG. 8 is made. As a result, it is possible to obtain a lower AC resistance when an AC current having a predetermined frequency sufficiently lower than the resonance frequency, for example, 100 kHz is passed.

  As described above, the coil component 10 according to the present embodiment includes a current path that passes through the first and second coil portions 100 and 200 and a current path that passes through the third and fourth coil portions 300 and 400. Since the conditions match, an increase in AC resistance due to the unbalance of the capacitive components can be prevented. Moreover, since each coil part is formed in the front and back of the insulated substrates 11 and 12, the four coil parts 100, 200, 300, and 400 can be supported by the two insulated substrates 11 and 12, and the number of parts is reduced. Can be minimized. In addition, the inner peripheral ends of the first and second coil portions 100 and 200 are connected to each other through a connecting portion provided through the insulating substrate 11, and a connecting portion provided through the insulating substrate 12 is provided. Since the inner peripheral ends of the third and fourth coil portions 300 and 400 are connected to each other, there is no need to connect the inner peripheral ends of the coil portions formed on different insulating substrates, and the structure is simplified. Can be

  Furthermore, in the coil component 10 according to the present embodiment, each turn is divided into four in the radial direction by a spiral slit, so that the bias of current density is reduced compared to the case where such a slit is not provided. . As a result, direct current resistance and alternating current resistance can be further reduced. Moreover, the radial position of the conductor portion is completely exchanged between the first coil unit 100 and the second coil unit 200, and between the third coil unit 300 and the fourth coil unit 400. Since the radial positions of the conductor portions are completely replaced, the difference between the inner and outer circumferences is canceled out. Thereby, since the current density distribution is made uniform, it becomes possible to reduce DC resistance and AC resistance.

  Moreover, since most of the first coil unit 100 and the second coil unit 200 overlap in plan view except for the transition regions B1 and B2, even when the insulating substrate 11 is transparent or translucent, Visual interference between the first coil unit 100 and the second coil unit 200 can be minimized. That is, when the appearance inspection of the first coil unit 100 is performed, the second coil unit 200 does not become a visual obstacle. Conversely, when the appearance inspection of the second coil unit 200 is performed, the first coil unit 100 is not affected. Is not a visual obstacle. Thereby, it is possible to correctly execute the appearance inspection using the inspection apparatus. The same applies to the third coil unit 300 and the fourth coil unit 400, and the appearance inspection using the inspection apparatus can be correctly executed.

  In the present embodiment, each turn constituting the first to fourth coil parts 100, 200, 300, 400 is divided into four in the radial direction. In the present invention, each turn is divided in the radial direction. It is not essential to do this, and the number of divisions is not particularly limited even when dividing. As for the number of divisions, the current density distribution becomes more uniform as the number of divisions increases. On the other hand, when the number of divisions increases, the area occupied by the slits increases accordingly, and the conductor area per turn tends to decrease and the DC resistance tends to increase. There is. Considering this point, it is preferable to set the number of divisions to 4-8. The actual number of divisions may be determined by the frequency of the current flowing through the coil component. It is preferable that the number of divisions is reduced as the frequency band is lower and the number of divisions is increased as the frequency band is higher. In particular, when the coil component according to the present invention is used as a power receiving coil of a wireless power transmission system, the frequency of the received AC power is 30 to 150 kHz, and in this case, the division number is optimally four.

<Second Embodiment>
FIG. 10 is a schematic cross-sectional view for explaining the configuration of the coil component 20 according to the second embodiment of the present invention.

  As shown in FIG. 10, the coil component 20 according to the present embodiment has the inner peripheral end of the first coil unit 100 connected to the inner peripheral end of the fourth coil unit 400 via the wiring 21, and the second coil. It differs from the coil component 10 according to the first embodiment in that the inner peripheral end of the part 200 is connected to the inner peripheral end of the third coil part 300 via the wiring 22. Since other configurations are the same as those of the coil component 10 according to the first embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  Also in the coil component 20 according to the present embodiment, the conditions of the current path that passes through the first and second coil portions 100 and 200 and the current path that passes through the third and fourth coil portions 300 and 400 match. Therefore, the AC resistance can be reduced. Moreover, in this embodiment, since it is not necessary to connect the inner peripheral ends of the coil portions formed on the front and back sides of the insulating substrates 11 and 12, the alignment of the coil portions formed on the front and back sides of the insulating substrates 11 and 12 is performed. There is no need to adjust strictly.

<Third Embodiment>
FIG. 11 is a schematic cross-sectional view for explaining the configuration of the coil component 30 according to the third embodiment of the present invention.

  As shown in FIG. 11, in the coil component 30 according to the present embodiment, the first coil unit 100 is formed on the surface S11 of the insulating substrate 31, and the third coil unit 300 is formed on the surface S12 of the insulating substrate 31, The second coil unit 200 is formed on the surface S13 of the insulating substrate 32, and the fourth coil unit 400 is formed on the surface S14 of the insulating substrate 33. The inner peripheral end of the first coil unit 100 is connected to the inner peripheral end of the second coil unit 200 through the wiring 34, and the inner peripheral end of the third coil unit 300 is connected to the fourth through the wiring 35. Is connected to the inner peripheral end of the coil portion 400. Since other configurations are the same as those of the coil component 10 according to the first embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  Also in the coil component 30 according to the present embodiment, the conditions of the current path that passes through the first and second coil portions 100 and 200 and the current path that passes through the third and fourth coil portions 300 and 400 match. Therefore, the AC resistance can be reduced. In the present embodiment, since the insulating substrates 31 to 33 are always interposed between two coil portions adjacent in the stacking direction, contact between the two coil portions adjacent in the stacking direction can be prevented.

<Fourth Embodiment>
FIG. 12 is a schematic cross-sectional view for explaining the configuration of the coil component 40 according to the fourth embodiment of the present invention.

  As shown in FIG. 12, the coil component 40 according to the present embodiment includes a fifth coil unit 500 formed on the surface S <b> 5 of the insulating substrate 41 and a sixth coil unit 600 formed on the surface S <b> 6 of the insulating substrate 42. Is different from the coil component 10 according to the first embodiment. The insulating substrate 41 and the insulating substrate 42 are arranged vertically so as to sandwich the coil component 10 according to the first embodiment. The outer peripheral end of the fifth coil unit 500 is connected to the terminal electrode E1, the outer peripheral end of the sixth coil unit 600 is connected to the terminal electrode E2, and the inner peripheral end of the fifth coil unit 500 The inner peripheral ends of the coil unit 600 are connected to each other through the wiring 43. Since other configurations are the same as those of the coil component 10 according to the first embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  In the coil component 40 according to the present embodiment, in addition to the current path passing through the first and second coil parts 100 and 200 and the current path passing through the third and fourth coil parts 300 and 400, the fifth and Since a current path passing through the sixth coil units 500 and 600 is added, the direct current resistance and the alternating current resistance can be further reduced. Moreover, since the symmetry which made the center plane P in the lamination direction symmetrical is also ensured, it can be used as a coil component without directionality.

<Fifth Embodiment>
FIG. 13: is typical sectional drawing for demonstrating the structure of the coil component 50 by the 5th Embodiment of this invention.

  As shown in FIG. 13, the coil component 50 according to the present embodiment includes a fifth coil portion 500 formed on one surface S <b> 5 of the insulating substrate 51 and a sixth coil formed on the other surface S <b> 6 of the insulating substrate 51. This is different from the coil component 10 according to the first embodiment in that a coil portion 600 is added. The outer peripheral end of the fifth coil unit 500 is connected to the terminal electrode E1, the outer peripheral end of the sixth coil unit 600 is connected to the terminal electrode E2, and the inner peripheral end of the fifth coil unit 500 The inner peripheral ends of the coil part 600 are connected to each other via a connection part TH provided so as to penetrate the insulating substrate 51. Since other configurations are the same as those of the coil component 10 according to the first embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  Also in the coil component 50 according to the present embodiment, since a current path passing through the fifth and sixth coil portions 500 and 600 is added, the direct current resistance and the alternating current resistance can be further reduced. In addition, since the coil component 50 according to the present embodiment has directionality, when the coil component 50 is used as a power receiving coil of the wireless power transmission system, the second coil unit 200 is positioned on the magnetic body 52 side constituting the magnetic path. In addition, it is possible to obtain high power transmission efficiency by arranging the coil component 50 according to the present embodiment so that the sixth coil unit 600 is positioned on the power transmission coil 53 side.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Needless to say, it is included in the range.

10, 20, 30, 40, 50 Coil parts 11, 12 Insulating substrate 12 Second insulating substrate 21, 22 Wiring 31-33 Insulating substrate 34, 35 Wiring 41, 42 Insulating substrate 43 Wiring 51 Insulating substrate 52 Magnetic body 53 Power transmission Coil 100 1st coil part 200 2nd coil part 300 3rd coil part 400 4th coil part 500 5th coil part 600 6th coil part 110-150, 210-250 Turn 111-114,121 -124, 131-134, 141-144, 151-154, 211-214, 221-224, 231-234, 241-244, 251-254 Conductor portion A1, A2 Circumferential region B1, B2 Transition region Cp1-Cp3 Capacitance components E1, E1a, E1b Terminal electrodes E2, E2a, E2b Terminal electrodes P Center planes S1 to S6, S11 to S1 4 Surface TH, TH1-TH4 Connection

Claims (9)

First and second terminal electrodes;
First and third coil portions wound in a spiral shape over a plurality of turns, each of which is connected in common to the first terminal electrode;
A second and a fourth coil part wound in a spiral shape over a plurality of turns, each having an outer peripheral end commonly connected to the second terminal electrode;
An inner peripheral end of the first coil part is connected to an inner peripheral end of the second coil part,
An inner peripheral end of the third coil portion is connected to an inner peripheral end of the fourth coil portion,
The first to fourth coil portions are arranged so as to overlap each other so that the first and third coil portions are sandwiched between the second coil portion and the fourth coil portion. Coil parts to play. A first insulating substrate having a first surface and a second surface located opposite the first surface;
A second insulating substrate having a third surface facing the first surface of the first insulating substrate and a fourth surface located on the opposite side of the third surface;
The first coil portion is formed on the first surface of the first insulating substrate,
The second coil portion is formed on the second surface of the first insulating substrate,
The third coil portion is formed on the third surface of the second insulating substrate,
The fourth coil portion is formed on the fourth surface of the second insulating substrate,
An inner peripheral end of the first coil portion and an inner peripheral end of the second coil portion are connected to each other via a first connection portion provided through the first insulating substrate,
The inner peripheral end of the third coil portion and the inner peripheral end of the fourth coil portion are connected to each other via a second connection portion provided through the second insulating substrate. The coil component according to claim 1, wherein the coil component is a coil component.   3. The coil component according to claim 1, wherein each of the first to fourth coil portions includes at least first and second conductor portions separated in a radial direction by a spiral slit. 4. . The first conductor portion is located on the outer peripheral side of the second conductor portion,
An inner peripheral end of the first conductor portion of the first coil portion is connected to an inner peripheral end of the second conductor portion of the second coil portion,
An inner peripheral end of the second conductor portion of the first coil portion is connected to an inner peripheral end of the first conductor portion of the second coil portion,
An inner peripheral end of the first conductor portion of the third coil portion is connected to an inner peripheral end of the second conductor portion of the fourth coil portion,
The inner peripheral end of the second conductor portion of the third coil portion is connected to an inner peripheral end of the first conductor portion of the fourth coil portion. Coil parts. A fifth coil portion wound in a spiral shape over a plurality of turns and having an outer peripheral end connected to the first terminal electrode;
A sixth coil portion wound in a spiral shape over a plurality of turns and having an outer peripheral end connected to the second terminal electrode;
The fifth and sixth coil portions overlap with the first to fourth coil portions,
The coil component according to any one of claims 1 to 4, wherein an inner peripheral end of the fifth coil portion is connected to an inner peripheral end of the sixth coil portion.   The first coil part and the third coil part have the same pattern shape in plan view, and the second coil part and the fourth coil part have the same pattern shape in plan view, The coil component according to any one of claims 1 to 5.   The said 1st thru | or 4th coil part has the circumferential area | region where the position in radial direction does not change, and the transition area | region where the position in radial direction changes, The any one of the Claims 2 thru | or 6 characterized by the above-mentioned. The coil component according to one item.   The circumferential regions of the first and second coil portions have the same planar position, and the circumferential regions of the third and fourth coil portions have the same planar position. The coil component according to claim 7.   The coil component according to claim 8, wherein the first and second insulating substrates are transparent or translucent.