JP6221250B2 - Multilayer coil parts - Google Patents

Description

  The present invention relates to a laminated coil component.

  Patent Document 1 discloses a multilayer coil including an element body configured by stacking a plurality of rectangular magnetic layers and a coil configured by electrically connecting a plurality of internal conductors arranged in the element body. The parts are disclosed. The magnetic layer has first to fourth peripheral edges. The first and third peripheral edges face each other. The second and fourth peripheral edges are adjacent to the first and third peripheral edges, respectively, and face each other.

  Each inner conductor is disposed on a different magnetic layer. The inner conductor is wound with a length of one turn. Specifically, the inner conductor has first to fifth portions. The first portion extends along the first peripheral edge on the magnetic layer. The second portion extends along the second peripheral edge on the magnetic layer. One end of the second part is connected to one end of the first part. The third portion extends along the third peripheral edge on the insulating layer. One end of the third portion is connected to the other end of the second portion. The fourth portion extends along the fourth peripheral edge on the insulating layer. One end of the fourth portion is connected to the other end of the third portion. The other end of the fourth portion is separated from the first portion and is located closer to the third portion than the first portion. The fifth portion extends along the first peripheral edge on the insulating layer. One end of the fifth part is connected to the other end of the fourth part. Accordingly, the first to fourth portions are located on each side of the rectangular virtual rectangle. The fifth portion extends inward from the virtual rectangle.

JP 2011-014834 A

  An object of the present invention is to provide a laminated coil component capable of obtaining excellent DC superposition characteristics by suppressing magnetic saturation.

  As a result of intensive studies by the present inventors, it has been found that the laminated coil component described in Patent Document 1 is likely to cause magnetic saturation and can affect the DC superposition characteristics. The multilayer coil component described in Patent Document 1 requires a fifth portion extending inward from the virtual rectangle because of the structure in which the inner conductor is wound on the magnetic layer for one turn. The fifth portion faces the third portion on a side closer to the first portion. Therefore, the region formed between the third portion and the fifth portion is narrower than the region formed between the third portion and the first portion.

  When a current flows sequentially to the first to fifth portions, the direction of the current flowing through the third portion and the direction of the current flowing through the fifth portion are reversed. Therefore, the magnetic field generated around the third part and the magnetic field generated around the fifth part interact to form a larger magnetic field between the third part and the fifth part. It becomes easy. Therefore, the region between the third portion and the fifth portion of the magnetic layer is magnetically saturated prior to the other regions.

  Then, in order to suppress such magnetic saturation, when the present inventors further examined, it came to complete this invention. That is, the laminated coil component according to one aspect of the present invention includes an element body formed by laminating a plurality of rectangular insulator layers including a magnetic body layer, and an internal conductor disposed in the element body. A first external electrode connected to the coil and one end of the coil and disposed on the outer surface of the element body, and a first outer electrode connected to the other end side of the coil and disposed on the outer surface of the element body 2, the element body has first and second main surfaces facing each other, and the inner conductor is 1 on a virtual plane orthogonal to the opposing direction of the first and second main surfaces. It is wound by a turn winding, and has first to sixth parts connected in this order. The first part has a pair of first and second long sides and a pair of first and first parts. Of the virtual rectangle formed by the two short sides, extends on the first long side, and the second portion is on the first short side. Extending from the first long side toward the second long side so as to connect the first and third parts, and the third part is on the second long side of the virtual rectangle. And the end portion on the second short side is located between the first and second short sides, and the fourth portion extends from the second long side to the second short side. Passing through the inside of the virtual rectangle and extending obliquely with respect to the second long side and the second short side so as to connect the third part and the fifth part, and the fifth part is , Extending on the second short side, the end on the first long side is separated from the first part, and the sixth part is the first long side and the second short side It extends along the first portion on the inner side of the virtual rectangle so as to face the first portion near the first corner formed by.

  In the multilayer coil component according to one aspect of the present invention, the first portion and the sixth portion face each other near the first corner of the insulator layer. In the multilayer coil component according to one aspect of the present invention, the fourth portion passes through the inside of the virtual rectangle from the second long side toward the first short side, and the third portion and the fifth portion Extending to connect. Therefore, the area surrounded by the fourth part and the sixth part becomes narrow. Therefore, since the concentration of magnetic flux in the region is suppressed, magnetic saturation is difficult in the region. As a result, magnetic saturation can be suppressed, and more excellent direct current superposition characteristics can be obtained.

  The second portion has a portion that passes through the inside of the virtual rectangle from the first short side toward the second long side and extends obliquely with respect to the first short side and the second long side. May be.

  A first auxiliary conductor positioned between the coil and the pair of first external electrodes in the element body; and a second auxiliary conductor positioned between the coil and the pair of second external electrodes in the element body. The element body further includes a pair of first and second end surfaces facing each other and extending between the first and second main surfaces, and the first external electrode is formed of the first main surface. A pair of second external electrodes are disposed near the first end surface, and a pair of second external electrodes are disposed near the second end surface of the first main surface, and the pair of first external electrodes and the first auxiliary are disposed. The conductors are connected by a pair of first connection conductors extending in the opposing direction of the first and second main surfaces, and the pair of second external electrodes and the second auxiliary conductor are the first and second auxiliary conductors. The first auxiliary conductor and one end of the coil are connected by a pair of second connection conductors extending in the opposing direction of the two main surfaces. Are connected by a third connection conductor extending in the opposing direction of the first and second main surfaces, and the other end of the coil has a first corner portion in the opposing direction of the first and second end surfaces. And one end of the fourth connecting conductor extending between the second corner located at the opposite corner of the first corner of the virtual rectangle is connected, and the second auxiliary conductor and the fourth connection are connected. The other end of the conductor may be connected by a fifth connection conductor extending in the opposing direction of the first and second main surfaces. In this case, the pair of first external electrodes are connected to one end of the coil via the pair of first connection conductors, the first auxiliary conductor, and the third connection conductor. For this reason, the pair of first external electrodes are in an electrically connected state. A pair of second external electrodes is connected to the other end of the coil via a pair of second connection conductors, a second auxiliary conductor, a fifth connection conductor, and a fourth connection conductor. Therefore, the pair of second external electrodes are in an electrically connected state. Accordingly, when these external electrodes are electroplated, an appropriate electric field is applied to these external electrodes. As a result, plating can be appropriately formed on these external electrodes.

  The element body has a pair of first and second end faces facing each other and extending between the first and second main faces, and the first external electrode is located on the first end face, The second external electrode may be located on the second end face.

  Both the first and second external electrodes may be located on the first main surface.

  The element body has a pair of first and second end faces facing each other and extending between the first and second main faces, and the first external electrode is a first of the first main faces. The second external electrode is disposed near the end surface, and the second external electrode is disposed near the second end surface of the first main surface. The first external electrode and one end of the coil are the first and second electrodes. Are connected by a first connection conductor extending in the opposing direction of the main surface of the coil, and the other end of the coil is connected to the first corner and the first of the virtual rectangles in the opposing direction of the first and second end surfaces. One end of a second connection conductor extending between the second corner located opposite to the corner of the first corner is connected, and the second connection conductor and the second external electrode are connected to the first and second corners, respectively. You may be connected by the 3rd connection conductor extended in the opposing direction of a 2nd main surface.

  ADVANTAGE OF THE INVENTION According to this invention, the laminated coil component which can acquire the outstanding direct current | flow superimposition characteristic by suppressing magnetic saturation can be provided.

FIG. 1 is a perspective view of the multilayer coil component according to the first embodiment. FIG. 2 is an exploded perspective view of the multilayer coil component according to the first embodiment. FIG. 3A is a plan view showing the first inner conductor, and FIG. 3B is a plan view showing the second inner conductor. FIG. 4 is a diagram showing a pattern of internal conductors arranged on the green sheet. FIG. 5 is a diagram showing a pattern of internal conductors arranged on the green sheet. FIG. 6 is a perspective view of the multilayer coil component according to the second embodiment. FIG. 7 is an exploded perspective view of the multilayer coil component according to the second embodiment. FIG. 8A is a plan view showing the first inner conductor, and FIG. 3B is a plan view showing the second inner conductor. FIG. 9 is a diagram showing a pattern of internal conductors arranged on the green sheet. FIG. 10 is a diagram showing a pattern of internal conductors arranged on a green sheet.

  Embodiments of the present invention will be described with reference to the drawings. However, the following embodiments are exemplifications for explaining the present invention and are not intended to limit the present invention to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

(First embodiment)
As shown in FIG. 1, the laminated coil component 1 includes a base body 10 having a rectangular parallelepiped shape, a pair of first external electrodes 12 positioned on the outer surface of the base body 10, and positions on the outer surface of the base body 10. And a pair of second external electrodes 14.

  The element body 10 has a pair of main surfaces 10a and 10b facing each other, a pair of side surfaces 10c and 10d facing each other, and a pair of end surfaces 10e and 10f facing each other. These outer surfaces 10a to 10f all have a rectangular shape.

  The pair of main surfaces 10a and 10b are adjacent to the pair of side surfaces 10c and 10d and the pair of end surfaces 10e and 10f. The pair of side surfaces 10c and 10d are adjacent to the pair of main surfaces 10a and 10b and the pair of end surfaces 10e and 10f. The pair of end surfaces 10e and 10f are adjacent to the pair of main surfaces 10a and 10b and the pair of side surfaces 10c and 10d.

  The pair of side surfaces 10c and 10d are adjacent to the pair of main surfaces 10a and 10b and the pair of end surfaces 10e and 10f. The long side portions of the pair of main surfaces 10a and 10b are connected to the long side portions of the pair of side surfaces 10c and 10d. The short side portions of the pair of main surfaces 10a and 10b are connected to the long side portions of the pair of end surfaces 10e and 10f. The short side portions of the pair of side surfaces 10c and 10d are connected to the short side portions of the pair of end surfaces 10e and 10f. In plan view, the element body 10 has a corner c1 formed by the side surface 10c and the end surface 10e, a corner c2 formed by the side surface 10d and the end surface 10e, and a corner formed by the side surface 10c and the end surface 10f. It has a part c3 and a corner part c4 formed by the side face 10d and the end face 10f.

  As shown in FIG. 2, the element body 10 is formed by laminating a plurality of insulator layers A10 to A20. Each insulator layer A10 to A20 has a rectangular shape. Each of the insulator layers A10 to A20 is an insulator having electrical insulation properties, and is formed of a sintered body of an insulator green sheet. In the actual element body 10, the insulating layers A <b> 10 to A <b> 20 are integrated to such an extent that the boundary between them cannot be visually recognized by sintering.

  The insulator layers A10 to A20 are stacked in this order. The surface of the insulator layer A10 (the upper surface in FIG. 2) corresponds to the main surface 10a of the element body 10. The surface of the insulator layer A20 (the lower surface in FIG. 2) corresponds to the main surface 10b of the element body 10.

  The insulator layers A10 to A20 are made of a magnetic material such as ferrite (Ni—Cu—Zn ferrite, Ni—Cu—Zn—Mg ferrite, Cu—Zn ferrite, Ni—Cu ferrite, etc.), for example. Has been. Some insulator layers may be made of nonmagnetic ferrite. For example, insulator layers A14, A16, and A18 in which an inner conductor 28a described later is disposed may be made of nonmagnetic ferrite, and the other insulator layers may be made of ferrite.

  A pair of first external electrodes 12 and a pair of second external electrodes 14 are disposed on the surface (main surface 10a) of the insulator layer A10. The pair of first external electrodes 12 are located in the region on the end surface 10e side of the main surface 10a, that is, on the short side forming the side surface 10e of the main surface 10a. The pair of first external electrodes 12 are separated from each other in the short side direction of the main surface 10a. The pair of second external electrodes 14 are located on the side surface 10f side region of the main surface 10a, that is, on the short side forming the end surface 10f of the main surface 10a. The pair of second external electrodes 14 are separated from each other in the short side direction of the main surface 10a.

  Each of the external electrodes 12 and 14 is located in the vicinity of the corner of the main surface 10a. Specifically, one of the first external electrodes 12 is located in the vicinity of the corner c1. The other of the first external electrodes 12 is located in the vicinity of the corner portion c2. One of the second external electrodes 14 is located in the vicinity of the corner portion c3. The other of the second external electrodes 14 is located in the vicinity of the corner c4.

  The first and second external electrodes 12 and 14 are rectangular in a plan view (viewed from the stacking direction of the insulator layers A10 to A20 or viewed from a direction perpendicular to the main surfaces 10a and 10b). It has a shape. In the present embodiment, the longitudinal direction of the first and second external electrodes 12, 14 is along the longitudinal direction of the main surface 10a. Each corner of the first and second external electrodes 12, 14 is rounded. The first and second external electrodes 12 and 14 include a conductive material (for example, Ag or Pd) and a glass component. The first and second external electrodes 12 and 14 are obtained by sintering a conductive paste containing conductive metal powder (for example, Ag powder or Pd powder) and glass frit. By electroplating the surface of the conductive paste, a plating layer (not shown) is formed on the surfaces of the first and second external electrodes 12 and 14. The plating layer is made of, for example, Ni or Sn.

  The insulator layers A10 and A11 are provided with a pair of through-hole conductors 16 penetrating in the thickness direction and a pair of through-hole conductors 18 penetrating in the thickness direction. That is, the through-hole conductors 16 and 18 extend in the stacking direction of the insulator layers A10 to A20.

  The through-hole conductor 16 is located in the region on the end surface 10e side of the main surface 10a, that is, on the short side forming the end surface 10e in the main surface 10a. The pair of through-hole conductors 16 are separated in the short side direction of the main surface 10a. Each through-hole conductor 16 overlaps with each first external electrode 12 when viewed from the stacking direction, and is connected to each first external electrode 12. Each through-hole conductor 16 is located in the vicinity of the corners c1 and c2.

  The through-hole conductor 18 is located in the region on the end surface 10f side of the main surface 10a, that is, on the short side forming the end surface 10f of the main surface 10a. The pair of through-hole conductors 18 are separated from each other in the short side direction of the main surface 10a. Each through-hole conductor 18 overlaps with each first external electrode 14 when viewed from the stacking direction, and is connected to each first external electrode 14. Each through-hole conductor 18 is located in the vicinity of the corners c3 and c4.

  First and second auxiliary conductors 20 and 22 are disposed on the surface of the insulator layer A12. The first auxiliary conductor 20 is located in a region on the end face 10e side in the insulator layer A12, that is, on the short side forming the end face 10e in the insulator layer A12. The first auxiliary conductor 20 has a rectangular shape in plan view. The first auxiliary conductor 20 extends along the short direction of the insulator layer A12. The first auxiliary conductor 20 overlaps the pair of first external electrodes 12 in plan view and is connected to the through-hole conductor 16. The area of the first auxiliary conductor 20 is set smaller than the area of one region constituted by the contours of the pair of first external electrodes 12. The first external electrode 20 is located inside the one region in plan view.

  The second auxiliary conductor 22 is located in the region on the end face 10f side in the insulator layer A12, that is, on the short side forming the end face 10f in the insulator layer A12. The second auxiliary conductor 22 has a rectangular shape in plan view. The second auxiliary conductor 22 extends along the short direction of the insulator layer A12. The second auxiliary conductor 22 overlaps the pair of first external electrodes 14 in plan view and is connected to the through-hole conductor 18. The area of the second auxiliary conductor 22 is set smaller than the area of one region constituted by the contours of the pair of second external electrodes 14. The first external electrode 22 is located inside the one region in plan view.

  The insulator layers A12 and A13 are provided with a through-hole conductor 24 penetrating in the thickness direction and a through-hole conductor 26 penetrating in the thickness direction. That is, the through-hole conductors 24 and 26 extend in the stacking direction of the insulator layers A10 to A20.

  The through-hole conductor 24 is located in the vicinity of the corner c1 in the insulator layers A12 and A13. The through-hole conductor 24 overlaps with one through-hole conductor 16 located at the corner on the side surface 10d side of the pair of through-hole conductors 16 when viewed from the stacking direction, and is connected to the one through-hole conductor 16. ing. The through-hole conductor 26 is located at the corner c4 in the insulator layers A12 and A13. The through-hole conductor 26 overlaps with one through-hole conductor 18 positioned at a corner on the side surface 10 c side of the pair of through-hole conductors 18 when viewed from the stacking direction, and is connected to the one through-hole conductor 18. ing.

  A first inner conductor 28 wound by one turn is disposed on the surface of the insulator layers A14, A16, A18. That is, the first inner conductor 28 is located on a virtual plane orthogonal to the opposing direction of the main surfaces 10a and 10b. The first inner conductor 28 has first to seventh portions 28a to 28g. The first to seventh portions 28a to 28g are connected in this order. Accordingly, the end portion of the first portion 28 a corresponds to one end portion of the first inner conductor 28. The end portion of the seventh portion 28 g corresponds to the other end portion of the first inner conductor 28.

  The first portion 28a extends along the long side forming the side surface 10d of the insulator layers A14, A16, A18. Specifically, as shown in FIGS. 2 and 3, the first portion 28a includes a pair of long sides T1, T2 and a pair of short sides T3, T4 on the insulator layers A14, A16, A18. The virtual rectangle T is positioned on the long side T1. One end of the first portion 28a is located on a corner c5 formed by the long side T1 and the short side T4 of the virtual rectangle T. The other end of the first portion 28a is located on a corner c6 formed by the long side T1 and the short side T3 of the virtual rectangle T. The end of the first portion 28 a is connected to the through-hole conductor 26.

  The second portion 28b extends along the short side that forms the end face 10e of the insulator layers A14, A16, and A18. Specifically, as shown in FIGS. 2 and 3, the second portion 28b is located on the short side T3 of the virtual rectangle T and extends from the long side T1 toward the long side T2. Yes. One end of the second portion 28b is located on the corner c6 of the virtual rectangle T. The other end of the second portion 28b is located between the corner c6 of the virtual rectangle T and the corner c7 formed by the short side T3 and the long side T2 of the virtual rectangle T. Not located.

  2 and 3, the third portion 28c is formed from the short side T3 toward the long side T2 (of the insulator layers A14, A16, A18, the side 10c is formed from the short side forming the end face 10e. (Toward the long side) extends obliquely with respect to the long sides T1, T2 and the short sides T3, T4 of the virtual rectangle T. That is, the third portion 28 c is located inside the virtual rectangle T in the vicinity of the corner c <b> 7 of the virtual rectangle T.

  The fourth portion 28d extends along the long side forming the side surface 10c of the insulator layers A14, A16, A18. Specifically, the fourth portion 28d is located on the long side T2 of the virtual rectangle T as shown in FIGS. Both ends of the fourth portion 28d are located between the corners c7 and c8 of the virtual rectangle T, and are not located on the corners c7 and c8.

  2 and 3, the fifth portion 28e extends from the long side T2 toward the short side T4 (from the long side forming the side surface 10c of the insulator layers A14, A16, A18 to the other short side). Toward the long side T1, T2 and short sides T3, T4 of the virtual rectangle T. That is, the fifth portion 28e is located inside the virtual rectangle T.

  The sixth portion 28f extends along the short side forming the end face 10f of the insulator layers A14, A16, A18. Specifically, the sixth portion 28f is located on the short side T4 of the virtual rectangle T as shown in FIGS. Both ends of the sixth portion 28f are located between the corners c5 and c8 of the virtual rectangle T and are not located on the corners c5 and c8. An end portion of the sixth portion 28f that is closer to the long side T1 (closer to the corner portion c5) is separated from the first portion 28a.

  As shown in FIGS. 2 and 3, the seventh portion 28g has a long side that forms the side surface 10d of the insulator layers A14, A16, and A18, that is, a virtual rectangle T inside the first portion 28a. It extends along the long side T1. Specifically, the seventh portion 28g extends from the corner of the virtual rectangle T toward the corner c6 toward the corner c5. The seventh portion 28g is located inside the virtual rectangle T. The seventh portion 28g opposes the end portion of the first portion 28a in the vicinity of the corner c5 of the virtual rectangle T.

  The insulator layers A14, A16, and A18 are provided with through-hole conductors 30 and 32 penetrating in the thickness direction. That is, the through-hole conductors 30 and 32 extend in the stacking direction of the insulator layers A10 to A20. The through-hole conductor 30 is located in the vicinity of the corner portion c1 and outside the first inner conductor 28. The through-hole conductor 32 is connected to the end of the seventh portion 28g.

  A second inner conductor 34 wound by one turn is disposed on the surfaces of the insulator layers A15 and A17. That is, the second inner conductor 34 is located on a virtual plane orthogonal to the facing direction of the main surfaces 10a and 10b. The second inner conductor 34 has first to seventh portions 34a to 34g. The first to seventh portions 34a to 34g are connected in this order. Accordingly, the end portion of the first portion 34 a corresponds to one end portion of the second inner conductor 34. The end portion of the seventh portion 34g corresponds to the other end portion of the second inner conductor 34.

  The first portion 34a extends along the short side forming the end face 10f of the insulator layers A15 and A17. Specifically, as shown in FIGS. 2 and 3, the first portion 34a is configured by a pair of long sides T1, T2 and a pair of short sides T3, T4 on the insulator layers A15, A17. The virtual rectangle T is located on the short side T4. One end of the first portion 34a is located on the corner c5 of the virtual rectangle T. The other end of the first portion 34a is located between the corner portion c5 and the corner portion c8 of the virtual rectangle T and is not located on the corner portion c8.

  As shown in FIGS. 2 and 3, the second portion 34b extends from the short side T4 toward the long side T2 (the long side forming the side surface 10c from the short side forming the end surface 10f of the insulator layers A15 and A17). Toward the long side T1, T2 and short sides T3, T4 of the virtual rectangle T. That is, the second portion 34b is located inside the virtual rectangle T.

  The third portion 34c extends along the long side forming the side surface 10c of the insulator layers A15 and A17. Specifically, the third portion 34c is located on the long side T2 of the virtual rectangle T, as shown in FIGS. Both ends of the third portion 34c are located between the corners c7 and c8 of the virtual rectangle T and are not located on the corners c7 and c8.

  As shown in FIG. 2 and FIG. 3, the fourth portion 34d is directed from the long side T2 to the short side T3 (from the long side forming the side surface 10c of the insulator layers A15 and A17 to the other short side). And extending obliquely with respect to the long sides T1 and T2 and the short sides T3 and T4 of the virtual rectangle T. That is, the fourth portion 34d is located inside the virtual rectangle T.

  The fifth portion 34e extends along the short side forming the end face 10e of the insulator layers A15 and A17. Specifically, the fifth portion 34e is located on the short side T3 of the virtual rectangle T as shown in FIGS. One end of the fifth portion 34e is located between the corner portion c6 and the corner portion c7 of the virtual rectangle T and is not located on the corner portion c7. The other end of the fifth portion 34e is located on the corner c6 of the virtual rectangle T.

  The sixth portion 34f extends along the long side forming the side surface 10d of the insulator layers A15 and A17. Specifically, the sixth portion 34f is located on the long side T1 of the virtual rectangle T as shown in FIGS. One end of the sixth portion 34f is located on the corner c6 of the virtual rectangle T. The other end of the sixth portion 34f is located between the corner portion c5 and the corner portion c6 of the virtual rectangle T and is not located on the corner portion c5. That is, the sixth portion 34f is separated from the first portion 34a.

  As shown in FIGS. 2 and 3, the seventh portion 34g has a short side that forms the end face 10f of the insulator layers A15 and A17, that is, a short side of the virtual rectangle T, inside the first portion 34a. It extends along T4. Specifically, the seventh portion 34g extends from the corner c5 of the virtual rectangle T toward the corner c8. The seventh portion 34g is located inside the virtual rectangle T. The seventh portion 34g opposes the end portion of the first portion 34a in the vicinity of the corner c5 of the virtual rectangle T. The seventh portion 34g is connected to the through-hole conductor 32.

  The insulator layers A15 and A17 are provided with through-hole conductors 30 and 36 penetrating in the thickness direction. That is, the through-hole conductors 30 and 36 extend in the stacking direction of the insulator layers A10 to A20. The through-hole conductor 30 is located in the vicinity of the corner c1 and outside the second inner conductor 34. The through-hole conductor 36 is connected to the end of the first portion 34a.

  The first and second inner conductors 28 and 34 alternately arranged on the insulator layers A14 to A18 are sequentially connected by the through-hole conductors 32 and 36 to form the coil L. One end of the coil L is connected to the second external electrode 14 through the through-hole conductor 26, the auxiliary conductor 22, and the through-hole conductor 18.

  On the surfaces of the insulator layers A19 and A20, a connection conductor 38 wound by about 5/8 turn is disposed. In other words, the connection conductors 38 are located on virtual planes orthogonal to the opposing direction of the main surfaces 10a and 10b. One end of the connection conductor 38 is located near the corner c1, and the other end of the connection conductor 38 is located near the corner c4. One end of the connection conductor 38 on the insulator layer A19 is connected to the through-hole conductor 30. The other end of the connection conductor 38 on the insulator layer A19 is connected to the through-hole conductor 32.

  The insulator layer A19 is provided with through-hole conductors 40 and 42 penetrating in the thickness direction. That is, the through-hole conductors 40 and 42 extend in the stacking direction of the insulator layers A10 to A20. The through-hole conductor 40 is located near the corner portion c1, and the through-hole conductor 42 is located near the corner portion c4.

  One end of the connection conductor 38 on the insulator layer A20 is connected to the through-hole conductor 40. The other end of the connection conductor 38 on the insulator layer A20 is connected to the through-hole conductor 42. If two or more connecting conductors 38 are arranged in parallel in the element body 10 as in the present embodiment, the cross-sectional area of the conductor increases, and thus the resistance can be reduced. There may be no insulator layer A20 and connection conductor 38, and only one connection conductor 38 may be disposed in the element body 10. The other end of the coil L is connected to the first external electrode 12 through the through-hole conductors 32 and 42, the connection conductor 38, the through-hole conductors 24 and 40, the auxiliary conductor 20 and the through-hole conductor 16.

  The auxiliary conductors 20 and 22 can be configured in the same manner as the external electrodes 12 and 14. Each conductor 16, 18, 24, 26, 28, 30, 32, 34, 40, 42 includes a conductive material (for example, Ag or Pd). Each of the conductors 16, 18, 24, 26, 28, 30, 32, 34, 40, and 42 is obtained by sintering a conductive paste containing a conductive metal powder (for example, Ag powder or Pd powder). .

  Then, the manufacturing method of said laminated coil component 1 is demonstrated. First, a binder or the like is mixed with the ferrite that is the main component of the element body 10 to prepare an insulator slurry that becomes the insulator layers A10 to A20. Next, a binder or the like is mixed with the conductive metal powder to prepare a first conductive paste to be the conductors 16, 18, 24, 26, 28, 30, 32, 34, 40, 42. Next, glass frit, a binder, etc. are mixed with conductive metal powder, and the 2nd conductive paste used as each auxiliary conductor 20 and 22 and each external electrode 12 and 14 is prepared.

  Next, the insulator slurry is applied onto a substrate (for example, a PET film) by a doctor blade method to form an insulator green sheet. Next, a through-hole is formed by laser processing at a predetermined formation position of the through-hole conductor in a predetermined insulator green sheet. Next, the first conductive paste is filled into the through holes to form conductor patterns to be the through-hole conductors 16, 18, 24, 26, 30, 32, 36, 40, 42.

  Next, a second conductive paste is applied on the insulator green sheet to be the insulator layer A12 to form a predetermined conductor pattern to be the auxiliary conductors 20 and 22.

  Next, a first conductive paste is applied on the insulator green sheets to be the insulator layers A14, A16, A18, and a predetermined conductor pattern to be the first inner conductor 28 is formed. Specifically, as shown in FIG. 4, a plurality of conductor patterns 28A and 28B are arranged on an insulator green sheet so that adjacent conductor patterns 28A and conductor patterns 28B are point-symmetric. In this case, the through-hole in which the through-hole conductor 30 is formed is a portion that becomes the third and fifth portions 28c and 28e in the conductor pattern 28A, and the third and fifth portions 28c and 28e in the conductor pattern 28B. It is surrounded by the part which becomes. Since the third and fifth portions 28c and 28e extend obliquely, the distance from the through hole can be increased. Therefore, when the first conductive paste is filled into the through hole, even if the first conductive paste spreads from the through hole to the periphery (so-called blurring occurs), a short circuit occurs. It becomes difficult to do. Moreover, when laminating | stacking a some insulator green sheet, sheets become easy to adhere favorably.

  Next, a first conductive paste is applied on the insulator green sheets to be the insulator layers A15 and A17, and a predetermined conductor pattern to be the second inner conductor 34 is formed. Specifically, as shown in FIG. 5, a plurality of conductor patterns 34A and 34B are arranged on an insulator green sheet so that adjacent conductor patterns 34A and conductor patterns 34B are point-symmetric. In this case, the through-hole in which the through-hole conductor 30 is formed is a portion that becomes the second and fourth portions 34b and 34d of the conductor pattern 34A, and the second and fourth portions 34b and 34d of the conductor pattern 34B. Surrounded by parts. Therefore, when the first conductive paste is filled into the through hole, even if the first conductive paste spreads from the through hole to the periphery (so-called blurring occurs), a short circuit occurs. It becomes difficult to do. Moreover, when laminating | stacking a some insulator green sheet, sheets become easy to adhere favorably.

  Next, a first conductive paste is applied on the insulator green sheets to be the insulator layers A19 and A20, and a predetermined pattern to be the connection conductor 38 is formed.

  Next, the insulator green sheet on which the conductor pattern is formed is peeled off from the substrate and laminated. Here, a predetermined number of insulating green sheets are aligned in a predetermined size and pressed from the stacking direction to obtain a green stacked body. Next, the green laminate is cut into chips of a predetermined size with a cutting machine to obtain green chips (cutting step). The obtained green chip may be barrel-polished to round the ridge of the green chip.

  Next, after removing the binder resin contained in each part from the green chip, the green chip is fired. By this firing, the insulator green sheet becomes the insulator layers A10 to A20, and the conductor paste applied on the insulator green sheet and the conductive paste filled in the through holes become the conductors 16 to 42, respectively. The element body 10 is obtained. The obtained element body 10 may be barrel-polished to round the ridges of the element body 10.

  Next, the second conductive paste is applied to the main surface 10a of the element body 10, and the conductive paste is baked onto the element body 10 by heat treatment, so that the pair of first external electrodes 12 and the pair of first electrodes Two external electrodes 14 are formed. Plating may be performed on the electrode formed by baking the conductive paste. For example, the metal plating may have a multilayer structure in which two or more layers of Ni and Sn are formed.

  The step of filling the conductive paste into the through holes to form the conductor patterns to be the through-hole conductors 16, 18, 24, 26, 30, 32, 36, 40, 42 is performed by applying the first conductive paste. Simultaneously with the step of forming the predetermined conductor pattern to be the inner conductors 28, 34, 38, or the step of forming the predetermined conductive pattern to be the auxiliary conductors 20, 22 by applying the second conductive paste. It may be done.

  The method of forming each external electrode 12 and 14 may be as follows. That is, a first conductive paste is applied to an insulator green sheet to be the insulator layer 10a to form a predetermined conductor pattern to be the external electrodes 12 and 14, and fired simultaneously with the conductors 16 to 42. Also good.

  As described above, in the multilayer coil component 1 according to the first embodiment, the one end portion (first portion 28a) and the other end portion (seventh portion 28g) of the inner conductor 28 are close to the corner portion c4. The portions of the inner conductor 28 (fifth portion 28e) located opposite to each other at the corner c3 extend so as to pass inside the virtual rectangle T. Therefore, the region surrounded by the seventh portion 28g and the fifth portion 28e becomes narrow. Therefore, since the concentration of magnetic flux in the region is suppressed, magnetic saturation is difficult in the region. As a result, magnetic saturation can be suppressed, and more excellent direct current superposition characteristics can be obtained.

  In the laminated coil component 1 according to the first embodiment, the pair of first external electrodes 12 are electrically connected to one end of the coil L through the first auxiliary conductor 20. Therefore, none of the first external electrodes 12 is in an electrically floating state. In the laminated coil component 1 according to the present embodiment, the pair of second external electrodes 14 are electrically connected to the other end of the coil L through the second auxiliary conductor 22. Therefore, none of the second external electrodes 14 is in an electrically floating state. Accordingly, when electroplating is performed on the pair of first and second external electrodes 12 and 14, an appropriate electric field is applied to the first and second external electrodes 12 and 14. . As a result, in the multilayer coil component 1, plating can be appropriately formed on the first and second external electrodes 12 and 14.

(Second Embodiment)
Next, the laminated coil component 1 according to the second embodiment will be described. Below, it demonstrates centering around difference with the multilayer coil component 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 6, the laminated coil component 2 includes an element body 10 and first and second external electrodes 12 and 14. As shown in FIG. 7, the element body 10 is formed by laminating a plurality of insulator layers A21 to A30. Each insulator layer A21 to A30 has a rectangular shape. Each of the insulator layers A21 to A30 is an insulator having electrical insulation properties, and is formed of a sintered body of an insulator green sheet. In the actual element body 10, the insulating layers A <b> 21 to A <b> 30 are integrated so that the boundary between them cannot be visually recognized by sintering.

  The insulator layers A21 to A30 are stacked so as to be arranged in this order. The surface of the insulator layer A21 (the upper surface in FIG. 6) corresponds to the main surface 10a of the element body 10. The surface of the insulator layer A30 (the lower surface in FIG. 2) corresponds to the main surface 10b of the element body 10. The insulator layers A21 to A30 are configured in the same manner as the insulator layers A10 to A20.

  A lead conductor 44 and a connection conductor 46 are disposed on the surface of the insulator layer A22. The lead conductor 44 is drawn to the end face 10 f side so as to be exposed from the end face 10 f of the element body 10, and is connected to the second external electrode 14. The lead conductor 44 has a rectangular shape and extends from the corner c3 to the corner c4 on the end face 10f side. The connection conductor 46 extends along the long side forming the side surface 10d of the insulator layer A22 in the vicinity of the corner portion c4.

  The insulator layer A22 is provided with a through-hole conductor 48 penetrating in the thickness direction. That is, the through-hole conductor 48 extends in the stacking direction of the insulator layers A21 to A30. The through-hole conductor 48 is located in the vicinity of the corner portion c4. The through-hole conductor 48 is connected to the end of the connection conductor 46.

  A third inner conductor 50 wound by one turn is disposed on the surface of the insulator layers A23, A25, A27. That is, the third inner conductor 50 is located on a virtual plane orthogonal to the opposing direction of the main surfaces 10a and 10b. The third inner conductor 50 has first to sixth portions 50a to 50f. The first to sixth portions 50a to 50f are connected in this order. Therefore, the end portion of the third portion 50 a corresponds to one end portion of the first inner conductor 50. The end portion of the sixth portion 50 f corresponds to the other end portion of the third inner conductor 50.

  The first portion 50a extends along the long side forming the side surface 10c of the insulator layers A23, A25, A27. Specifically, as shown in FIGS. 7 and 8, the first portion 50a is formed by a pair of long sides T1, T2 and a pair of short sides T3, T4 on the insulator layers A23, A25, A27. Of the constructed virtual rectangle T, it is located on the long side T1. One end of the first portion 50a is located on a corner c5 formed by the long side T1 and the short side T4 of the virtual rectangle T. The other end of the first portion 50a is located on a corner c6 formed by the long side T1 and the short side T3 of the virtual rectangle T. The end of the first portion 50 a is connected to the through-hole conductor 48.

  The second portion 50b extends along the short side forming the end face 10e of the insulator layers A23, A25, A27. Specifically, the second portion 50b is located on the short side T3 of the virtual rectangle T as shown in FIGS. One end of the second portion 50b is located on the corner c6 of the virtual rectangle T. The other end of the second portion 50b is located on the corner c7 of the virtual rectangle T.

  The third portion 50c extends along the long side forming the side surface 10d of the insulator layers A23, A25, A27. Specifically, the third portion 50c is located on the long side T2 of the virtual rectangle T, as shown in FIGS. One end of the third portion 50c is located on the corner c7 of the virtual rectangle T. The other end of the third portion 50c is located between the corner portion c7 and the corner portion c8 of the virtual rectangle T, and is not located on the corner portion c8.

  As shown in FIGS. 7 and 8, the fourth portion 50d extends from the long side T2 toward the short side T4 (from the long side forming the side surface 10d of the insulator layers A23, A25, A27 to the end surface 10f). (Toward the short side) extends obliquely with respect to the long sides T1, T2 and the short sides T3, T4 of the virtual rectangle T. That is, the fourth portion 50d is located inside the virtual rectangle T in the vicinity of the corner c8 of the virtual rectangle T.

  The fifth portion 50e extends along the short side that forms the end face 10f of the insulator layers A23, A25, and A27. Specifically, the fifth portion 50e is located on the short side T4 of the virtual rectangle T as shown in FIGS. Both ends of the fifth portion 50e are located between the corners c5 and c8 of the virtual rectangle T and are not located on the corners c5 and c8. An end portion of the fifth portion 50e near the long side T1 (closer to the corner portion c5) is separated from the first portion 50a.

  As shown in FIGS. 7 and 8, the sixth portion 50f has a long side that forms the side surface 10c of the insulator layers A23, A25, and A27, that is, a virtual rectangle T inside the first portion 50a. It extends along the long side T1. Specifically, the sixth portion 50f extends from the corner c5 of the virtual rectangle T toward the corner c6. The sixth portion 50f is located inside the virtual rectangle T. The sixth portion 50f opposes the end portion of the first portion 50a in the vicinity of the corner c5 of the virtual rectangle T.

  The insulator layers A23, A25, A27 are provided with through-hole conductors 52 penetrating in the thickness direction. That is, the through-hole conductor 52 extends in the stacking direction of the insulator layers A21 to A30. The through-hole conductor 52 is connected to the end of the sixth portion 50f.

  A fourth inner conductor 54 wound by one turn is disposed on the surface of the insulator layers A24, A26, A28. That is, the fourth inner conductor 54 is located on a virtual plane orthogonal to the opposing direction of the main surfaces 10a and 10b. The fourth inner conductor 54 has first to sixth portions 54a to 54f. The first to sixth portions 54a to 54f are connected in this order. Accordingly, the end portion of the first portion 54 a corresponds to one end portion of the fourth inner conductor 54. The end portion of the sixth portion 54 f corresponds to the other end portion of the fourth inner conductor 54.

  The first portion 54a extends along the short side that forms the end face 10f of the insulator layers A24, A26, and A28. Specifically, as shown in FIGS. 7 and 8, the first portion 54a is formed by a pair of long sides T1, T2 and a pair of short sides T3, T4 on the insulator layers A24, A26, A28. It is located on the short side T4 of the configured virtual rectangle T. One end of the first portion 54a is located on the corner c5 of the virtual rectangle T. The other end of the first portion 54a is located between the corner portion c5 and the corner portion c8 of the virtual rectangle T and is not located on the corner portion c8. The end of the first portion 54a is connected to the through-hole conductor 52.

  As shown in FIGS. 7 and 8, the second portion 54b is directed from the short side T4 to the long side T2 (of the insulator layers A24, A26, A28, the side 10d is formed from the short side forming the end face 10f). (Toward the long side) extends obliquely with respect to the long sides T1, T2 and the short sides T3, T4 of the virtual rectangle T. That is, the second portion 52b is located inside the virtual rectangle T.

  The third portion 54c extends along the long side forming the side surface 10d of the insulator layers A24, A26, A28. Specifically, the third portion 54c is located on the long side T3 of the virtual rectangle T as shown in FIGS. One end of the third portion 54c is located between the corner portion c7 and the corner portion c8 of the virtual rectangle T, and is not located on the corner portion c8. The other end of the third portion 54c is located on the corner c7 of the virtual rectangle T.

  The fourth portion 54d extends along the short side that forms the end face 10e of the insulator layers A24, A26, and A28. Specifically, the fourth portion 54d is located on the short side T3 of the virtual rectangle T on the insulator layers A24, A26, A28, as shown in FIGS. One end of the fourth portion 54d is located on the corner c7 of the virtual rectangle T. The other end of the fourth portion 54d is located on the corner c6 of the virtual rectangle T.

  The fifth portion 54e extends along the long side forming the side surface 10c of the insulator layers A24, A26, and A28. Specifically, the fifth portion 54e is located on the long side T1 of the virtual rectangle T as shown in FIGS. One end of the fifth portion 54e is located on the corner c6 of the virtual rectangle T. The other end of the fifth portion 54e is located between the corner portion c5 and the corner portion c6 of the virtual rectangle T and is not located on the corner portion c5. The end of the fifth portion 54e near the short side T4 (close to the corner c5) is separated from the first portion 54a.

  As shown in FIGS. 7 and 8, the sixth portion 54f has a short side that forms the side surface 10f of the insulator layers A24, A26, and A28 inside the first portion 54a, that is, the virtual rectangle T. It extends along the short side T4. Specifically, the sixth portion 54f extends from the corner of the virtual rectangle T toward the corner c8 toward the corner c5. The sixth portion 54f is located inside the virtual rectangle T. The sixth portion 54f is opposed to the end portion of the first portion 54a in the vicinity of the corner portion c5 of the virtual rectangle T.

  The insulator layers A24, A26, A28 are provided with through-hole conductors 56 penetrating in the thickness direction. That is, the through-hole conductor 56 extends in the stacking direction of the insulator layers A21 to A30. The through-hole conductor 56 is connected to the end of the sixth portion 54f.

  On the surface of the insulating layer A29, a lead conductor 58 and a connection conductor 60 are disposed. The lead conductor 54 is drawn to the end face 10 e side so as to be exposed from the end face 10 e of the element body 10, and is connected to the first external electrode 12. The lead conductor 44 has a rectangular shape and extends from the corner portion c1 to the corner portion c2 on the end face 10e side. The connection conductor 60 extends along the long side forming the end face 10e in the insulator layer A29 in the vicinity of the corner c2.

  Third and fourth inner conductors 50 and 54 alternately arranged on the insulator layers A23 to A29 are sequentially connected by through-hole conductors 52 and 56 to form a coil L. One end of the coil L is connected to the second external electrode 14 through a through-hole conductor 48, a connection conductor 46, and a lead conductor 44. The other end of the coil L is connected to the first external electrode 12 through a through-hole conductor 56, a connection conductor 60, and a lead conductor 58.

  The first external electrode 12 is disposed in a region on the end surface 10e side among the end surface 10e, the main surfaces 10a and 10b, and the side surfaces 10c and 10d. The second external electrode 14 is arranged in a region on the end surface 10f side of the end surface 10f, the main surfaces 10a and 10b, and the side surfaces 10c and 10d.

  Then, the manufacturing method of said laminated coil component 2 is demonstrated. A step of preparing the insulator slurry and the first and second conductive pastes, filling the first conductive paste into the through holes formed in the insulator green sheet, Since the process of forming 56 is the same as the manufacturing method of the laminated coil component 1 according to the first embodiment, the subsequent processes will be described.

  A first conductive paste is applied on the insulator green sheet to be the insulator layer A22, and a predetermined conductor pattern to be the lead conductor 44 and the connection conductor 46 is formed. A first conductive paste is applied on the insulator green sheet to be the insulator layer A29, and a predetermined conductor pattern to be the lead conductor 58 and the connection conductor 60 is formed.

  Next, a first conductive paste is applied on the insulator green sheets to be the insulator layers A23, A25, A27, and a predetermined conductor pattern to be the third inner conductor 50 is formed. Specifically, as shown in FIG. 9, a plurality of conductor patterns 50A and 50B are arranged on an insulator green sheet so that adjacent conductor patterns 50A and conductor patterns 50B are point-symmetric.

  Next, a first conductive paste is applied on the insulator green sheets to be the insulator layers A24, A26, and A28, and a predetermined conductor pattern to be the fourth inner conductor 54 is formed. Specifically, as shown in FIG. 10, a plurality of conductor patterns 54A and 54B are arranged on an insulator green sheet so that adjacent conductor patterns 54A and conductor patterns 54B are point-symmetric.

  Next, the insulator green sheet on which the conductor pattern is formed is peeled off from the substrate and laminated. Here, a predetermined number of insulating green sheets are aligned in a predetermined size and pressed from the stacking direction to obtain a green stacked body. Next, the green laminate is cut into chips of a predetermined size with a cutting machine to obtain green chips (cutting step). The obtained green chip may be barrel-polished to round the ridge of the green chip.

  Next, after removing the binder resin contained in each part from the green chip, the green chip is fired. By this firing, the insulator green sheet becomes the insulator layers A21 to A30, and the conductor paste applied on the insulator green sheet and the conductive paste filled in the through holes become the conductors 44 to 60, respectively. The element body 10 is obtained. The obtained element body 10 may be barrel-polished to round the ridges of the element body 10.

  Next, the second conductive paste is applied to each of the end faces 10e and 10f of the element body 10, and the conductive paste is baked on the element body 10 by performing heat treatment, so that the first and second external pastes are baked. Electrodes 12 and 14 are formed. Plating may be performed on the electrode formed by baking the conductive paste. For example, the metal plating may have a multilayer structure in which two or more layers of Ni and Sn are formed.

  As described above, the laminated coil component 2 according to the second embodiment has the same effects as the laminated coil component 1 according to the first embodiment.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to above-described embodiment. For example, in the first embodiment, the third portion 28c of the first inner conductor 28 and the fourth portion 28d of the second inner conductor 34 are formed obliquely, but along the virtual rectangle T. The first and second inner conductors 28 and 34 may extend at a right angle. In the second embodiment, the vicinity of the corner c1 of the third inner conductor 50 and the vicinity of the corner c1 of the fourth inner conductor 54 extend at right angles along the virtual rectangle T. However, a portion near the corner of the third and fourth inner conductors 50 and 54 may extend obliquely so as to pass inside the virtual rectangle T.

  DESCRIPTION OF SYMBOLS 1, 2 ... Laminated coil component, 10 ... Element body, 10a, 10b ... Main surface, 10c, 10d ... Side surface, 10e, 10f ... End surface, 12, 14 ... External electrode, 16, 18, 24, 26, 30, 32 , 36, 40, 42, 48, 52, 56 ... through-hole conductors, 20, 22 ... auxiliary conductors, 28, 34, 50, 54 ... internal conductors, 38 ... connection conductors, A10 to A30 ... insulator layers, c1 ~ c4 ... corner, L ... coil, T ... virtual rectangle, T1, T2 ... long side, T3, T4 ... short side.

Claims (6)

An element body formed by laminating a plurality of rectangular insulator layers including a magnetic layer;
A coil constituted by an inner conductor disposed in the element body;
A first external electrode connected to one end side of the coil and disposed on the outer surface of the element body;
A second external electrode connected to the other end of the coil and disposed on the outer surface of the element body;
The element body has first and second main surfaces facing each other;
The inner conductor is wound by one turn on a virtual plane orthogonal to the opposing direction of the first and second main surfaces, and has first to sixth parts connected in this order. And
The first portion extends on the first long side of a virtual rectangle formed by a pair of first and second long sides and a pair of first and second short sides,
The second portion extends from the first long side toward the second long side so as to connect the first and third portions on the first short side. ,
The third portion extends on the second long side of the virtual rectangle, and an end portion on the second short side is located between the first and second short sides. And
The fourth part passes through the inside of the virtual rectangle from the second long side toward the second short side, and connects the third part and the fifth part. Extending obliquely with respect to the second long side and the second short side,
The fifth portion extends on the second short side, and the end portion on the first long side is separated from the first portion,
The sixth portion is located on the inner side of the virtual rectangle so as to face the first portion near the first corner formed by the first long side and the second short side. A laminated coil component extending along the line.   The second portion passes through the inside of the virtual rectangle from the first short side toward the second long side, and is inclined with respect to the first short side and the second long side. The laminated coil component according to claim 1, having an extending portion. A first auxiliary conductor located between the coil and the pair of first external electrodes in the element body;
A second auxiliary conductor located between the coil and the pair of second external electrodes in the element body;
The element body has a pair of first and second end surfaces facing each other and extending between the first and second main surfaces,
A pair of the first external electrodes are disposed near the first end surface of the first main surface,
A pair of the second external electrodes are disposed near the second end surface of the first main surface,
The pair of first external electrodes and the first auxiliary conductor are connected by a pair of first connection conductors extending in a facing direction of the first and second main surfaces,
The pair of second external electrodes and the second auxiliary conductor are connected by a pair of second connection conductors extending in the opposing direction of the first and second main surfaces,
The first auxiliary conductor and one end of the coil are connected by a third connection conductor extending in a facing direction of the first and second main surfaces,
At the other end of the coil, in the opposing direction of the first and second end faces, the first corner and a second corner located diagonally to the first corner of the virtual rectangle One end of a fourth connection conductor extending between the first and second portions is connected,
The second auxiliary conductor and the other end of the fourth connection conductor are connected to each other by a fifth connection conductor extending in an opposing direction of the first and second main surfaces. The laminated coil component described. The element body has a pair of first and second end surfaces facing each other and extending between the first and second main surfaces,
The first external electrode is located on the first end face;
The multilayer coil component according to claim 1, wherein the second external electrode is located on the second end surface.   The laminated coil component according to claim 1 or 2, wherein both the first and second external electrodes are located on the first main surface. The element body has a pair of first and second end surfaces facing each other and extending between the first and second main surfaces,
The first external electrode is disposed near the first end surface of the first main surface,
The second external electrode is disposed near the second end surface of the first main surface,
The first external electrode and one end of the coil are connected by a first connection conductor extending in a facing direction of the first and second main surfaces,
At the other end of the coil, in the opposing direction of the first and second end faces, the first corner and a second corner located diagonally to the first corner of the virtual rectangle One end of the second connection conductor extending between the two portions is connected,
The laminated body according to claim 1 or 2, wherein the second connection conductor and the second external electrode are connected by a third connection conductor extending in a facing direction of the first and second main surfaces. Coil parts.

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