Laminated coil component

Abstract

To provide a laminated coil component capable of improving adhesion between external electrodes and a base body.SOLUTION: A laminated coil component 1 includes a base body 2, an external electrode 41 embedded in the base body 2 so as to be exposed from an end surface 2e and a principal surface 2a, an external electrode 42 embedded in the base body 2 so as to be exposed from an end surface 2f and the principal surface 2a, and a coil 3 having a first end 3x connected to the external electrode 41 and a second end 3y connected to the external electrode 42. A coil axis AX of the coil 3 extends along the direction of opposing side surfaces 2c, 2d. The coil 3 extends from the first end 3x, through the space between the coil axis AX and the principal surface 2a, to the space between the coil axis AX and the end surface 2f.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a laminated coil component. [Background technology]

[0002] A multilayer coil component is known that includes an element body, external electrodes provided on the element body, and a coil disposed within the element body (see, for example, Patent Document 1). In this multilayer coil component, the external electrodes are embedded in the element body so as to be exposed from the main surface and end surfaces of the element body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-34667 Summary of the Invention [Problem to be solved by the invention]

[0004] When the above-mentioned multilayer coil component is solder-mounted on an electronic device and subjected to a bonding strength test for the electronic device, the element body may peel off from the external electrodes and be damaged. In order to prevent such damage and improve the bonding strength of the multilayer coil component to the electronic device substrate, it is desirable to improve the adhesion between the external electrodes and the element body.

[0005] An object of the present disclosure is to provide a multilayer coil component that can improve the adhesion between external electrodes and an element body. [Means for solving the problem]

[0006] The present inventors have found that when the above-mentioned laminated coil component is subjected to a test for strength of adhesion to a substrate, the element body is damaged near the external electrodes, and the element body is peeled off from the external electrodes.

[0007] (1) A laminated coil component according to an aspect of the present disclosure comprises: an element body having first and second main surfaces opposing each other, first end surfaces and second end surfaces opposing each other, and first side surfaces and second side surfaces opposing each other; a first external electrode embedded in the element body so as to be exposed from the first end surfaces and the first main surfaces; a second external electrode embedded in the element body so as to be exposed from the second end surfaces and the first main surfaces; and a coil having a first end connected to the first external electrode and a second end connected to the second external electrode, wherein a coil axis of the coil extends along a direction in which the first side surfaces and the second side surfaces oppose each other, and the coil extends from the first end, passing between the coil axis and the first main surfaces, and reaching between the coil axis and the second end surfaces.

[0008] In this laminated coil component, the coil extends from a first end connected to the first external electrode, passing between the coil axis and the first main surface, and between the coil axis and the second end face. With this configuration, more conductors are likely to be disposed near the first and second external electrodes than in a configuration in which the coil extends from the first end, passing between the coil axis and the second main surface, and between the coil axis and the second end face. Because conductors are harder than the element body, disposing more conductors near the first and second external electrodes prevents the element body from being damaged near the first and second external electrodes. This improves adhesion between the element body and the first and second external electrodes.

[0009] (2) The laminated coil component of (1) above may further include a first connecting conductor connecting the first end and the first external electrode, the coil having a coil portion disposed closer to the first main surface, and the first connecting conductor being connected to the coil portion. In this case, more conductors are disposed near the first external electrode. This can further improve adhesion between the element body and the first external electrode.

[0010] (3) The laminated coil component of (2) above may further include a second connecting conductor connecting the second end and the second external electrode, and the second connecting conductor may be connected to the coil portion. In this case, more conductors are disposed near the second external electrode. This can further improve adhesion between the element body and the second external electrode.

[0011] (4) The laminated coil component according to any one of (1) to (3) above may further include a first connecting conductor connecting the first end and the first external electrode, the first external electrode having a first electrode portion provided on the first end surface and a second electrode portion provided on the first main surface, and the first connecting conductor may be connected to the first electrode portion. In this case, the first connecting conductor tends to be long. Therefore, more conductors are disposed near the first external electrode, which further improves adhesion between the element body and the first external electrode.

[0012] (5) In the multilayer coil component of (4), the first connecting conductor may also be connected to the second electrode portion. In this case, more conductors are disposed near the first external electrode. This further improves adhesion between the element body and the first external electrode.

[0013] (6) In the multilayer coil component of (4) or (5), the first connecting conductor may be connected to the first electrode portion at a position closer to the first main surface than to the second main surface in the opposing direction of the first main surface and the second main surface. In this case, more conductors are disposed near the first external electrode. This can further improve adhesion between the element body and the first external electrode. [Effects of the Invention]

[0014] The present disclosure provides a multilayer coil component that can improve the adhesion between external electrodes and an element body. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a laminated coil component according to one embodiment. [Figure 2]FIG. 2 is a plan view of the laminated coil component of FIG. 1 as viewed from the main surface 2a. [Figure 3] FIG. 3 is a plan view of the laminated coil component of FIG. 1 as viewed from the side surface 2c. [Figure 4] FIG. 4 is an exploded view of the laminated coil component of FIG. [Figure 5] FIG. 5 is a plan view of a laminated coil component according to a comparative example. [Figure 6] FIG. 6 is an exploded view of a laminated coil component according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and redundant description will be omitted as appropriate.

[0017] The configuration of a laminated coil component 1 according to this embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view of a laminated coil component according to one embodiment. FIG. 2 is a plan view of the laminated coil component of FIG. 1 as seen from a main surface 2a. FIG. 3 is a plan view of the laminated coil component of FIG. 1 as seen from a side surface 2c. In FIG. 3, the element body 2 is indicated by a dashed line. FIG. 4 is an exploded view of the laminated coil component of FIG. 1. The laminated coil component 1 according to this embodiment is solder-mounted in an electronic device. The electronic device includes, for example, a circuit board or an electronic component. The laminated coil component 1 is, for example, a high-frequency inductor.

[0018] As shown in FIGS. 1 to 3, the laminated coil component 1 includes an element body 2, a coil 3 disposed within the element body 2, a pair of external electrodes 41, 42 disposed on the surface of the element body 2, and a pair of connecting conductors 51, 52 disposed within the element body 2. The external electrodes 41, 42 are electrically connected to the coil 3. The element body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and ridges, and a rectangular parallelepiped shape with rounded corners and ridges.

[0019] The element body 2 has a pair of principal surfaces 2a and 2b facing each other, a pair of side surfaces 2c and 2d facing each other, and a pair of end surfaces 2e and 2f facing each other. The principal surfaces 2a and 2b, the side surfaces 2c and 2d, and the end surfaces 2e and 2f are rectangular. The principal surfaces 2a and 2b are adjacent to the side surfaces 2c and 2d and the end surfaces 2e and 2f. The side surfaces 2c and 2d and the end surfaces 2e and 2f are adjacent to each other. When the multilayer coil component 1 is solder-mounted to an electronic device, the principal surface 2a faces the electronic device to which it is solder-mounted. The principal surfaces 2a and 2b, the side surfaces 2c and 2d, and the end surfaces 2e and 2f are flat. A flat surface means a surface formed with the intention of being flat, and is not limited to a geometrically perfect flat surface. The flat surface may include curvatures and irregularities that occur during the manufacturing process.

[0020] The direction D3 in which the pair of principal surfaces 2a, 2b face each other is perpendicular to the principal surfaces 2a, 2b, respectively. The direction D1 in which the pair of side surfaces 2c, 2d face each other is perpendicular to the side surfaces 2c, 2d, respectively. The direction D2 in which the pair of end surfaces 2e, 2f face each other is perpendicular to the end surfaces 2e, 2f, respectively. The direction D3 is perpendicular to the directions D1 and D2. The directions D1 and D2 are perpendicular to each other. A pair of recesses corresponding to the pair of external electrodes 41, 42 are formed in the element body 2.

[0021] As shown in FIG. 4, the element body 2 includes multiple insulator layers 20 stacked in a direction D1. The multiple insulator layers 20 are integrated to the extent that the boundaries between the insulator layers 20 are not visible. Each insulator layer 20 is made of, for example, a non-magnetic material. The non-magnetic material includes, for example, a glass ceramic material or a dielectric material. The glass component is, for example, borosilicate glass. The dielectric material is, for example, a dielectric ceramic such as a BaTiO3-based, Ba(Ti,Zr)O3-based, or (Ba,Ca)TiO3-based material. In this embodiment, each insulator layer 20 is made of a sintered green sheet containing a non-magnetic material. Each insulator layer 20 may also be made of a magnetic material.

[0022] The multiple insulator layers 20 include a pair of outer layers 21, 22 (not shown in FIG. 4) shown in FIG. 2. The outer layers 21, 22 are located at both ends in the direction D1 and constitute the outermost layers of the element body 2. The outer layer 21 has a side surface 2c. The outer layer 22 has a side surface 2d. The remaining multiple insulator layers 20 are arranged between the outer layers 21, 22 in the direction D1 and constitute the laminate 23 shown in FIG. 2. The outer layers 21, 22 have higher rigidity than the laminate 23, and therefore can suppress breakage of the element body 2. The rigidity can be adjusted, for example, by the filler content. The coil 3, external electrodes 41, 42, and connecting conductors 51, 52 are arranged in the laminate 23 and not in the outer layers 21, 22.

[0023] The thicknesses of the multiple insulator layers 20 are equal to each other. In this specification, "equal" does not necessarily mean that the values ​​are the same. The values ​​may be considered equal even if they include slight differences within a preset range, manufacturing errors, or measurement errors. The thicknesses of the outer layers 21 and 22 may be different from the thicknesses of the insulator layers 20 that make up the laminate 23.

[0024] The external electrode 41 is embedded in the element body 2 so as to be exposed from the end face 2e and the main surface 2a. The external electrode 42 is embedded in the element body 2 so as to be exposed from the end face 2f and the main surface 2a. The external electrodes 41 and 42 have an L-shaped cross section when viewed from direction D1. The recesses formed in the element body 2 corresponding to the external electrodes 41 and 42 are L-shaped when viewed from direction D1.

[0025] The external electrode 41 includes an electrode portion 41a and an electrode portion 41b. The electrode portion 41a is exposed from the end face 2e. The electrode portion 41b is exposed from the main face 2a. The surface of the electrode portion 41a faces the same direction as the end face 2e. The surface of the electrode portion 41b faces the same direction as the main face 2a. The electrode portions 41a and 41b are continuous along the ridge between the end face 2e and the main face 2a.

[0026] The external electrode 42 includes an electrode portion 42a and an electrode portion 42b. The electrode portion 42a is exposed from the end face 2f. The electrode portion 42b is exposed from the main face 2a. The surface of the electrode portion 42a faces the same direction as the end face 2f. The surface of the electrode portion 42b faces the same direction as the main face 2a. The electrode portions 42a and 42b are continuous along the ridge between the end face 2f and the main face 2a.

[0027] In this embodiment, the length of the external electrodes 41, 42 in direction D3 is longer than the length of the external electrodes 41, 42 in direction D2. The electrode portions 41b, 42b are arranged so as to be exposed in the same direction as the main surface 2a. The surfaces of the electrode portions 41b, 42b and the main surface 2a may be located on the same plane. The surfaces of the electrode portions 41b, 42b may protrude from the main surface 2a. The electrode portion 41a is arranged so as to be exposed in the same direction as the end surface 2e. The surfaces of the electrode portion 41a and the end surface 2e may be located on the same plane. The surface of the electrode portion 41a may protrude from the end surface 2e. The electrode portion 42a is arranged on the end surface 2f so as to be exposed in the same direction as the end surface 2f. The surfaces of the electrode portion 42a and the end surface 2f may be located on the same plane. The surface of the electrode portion 42a may protrude from the end surface 2f. In this embodiment, the length of the electrode portions 41a and 42a in the direction D3 is longer than the length of the electrode portions 41b and 42b in the direction D2.

[0028] As shown in FIG. 3, the coil 3 is connected to external electrodes 41, 42 (see FIG. 1). The coil 3 has a first end 3x and a second end 3y. The first end 3x is connected to the external electrode 41 by a connecting conductor 51. The second end 3y is connected to the external electrode 42 by a connecting conductor 52. The coil axis AX of the coil 3 extends along direction D1. The coil 3 is disposed inside the element body 2 and is not exposed from the element body 2.

[0029] The coil 3 is wound counterclockwise around the coil axis AX when viewed from the side surface 2c. The coil 3 passes from the first end 3x between the coil axis AX and the main surface 2a, between the coil axis AX and the end surface 2f, between the coil axis AX and the main surface 2b, and between the coil axis AX and the end surface 2e, in this order, repeatedly, before reaching the second end 3y. The coil 3 passes from the second end 3y between the coil axis AX and the main surface 2a, between the coil axis AX and the end surface 2e, between the coil axis AX and the main surface 2b, and between the coil axis AX and the end surface 2f, in this order, repeatedly, before reaching the first end 3x.

[0030] The coil 3 has a ring shape when viewed from direction D1. The coil 3 has a pentagonal shape when viewed from direction D1. The pentagon is symmetrical in direction D2 with respect to a center line along direction D3. The pentagon includes a first side closest to the main surface 2b, a second side closest to the end surface 2f, third and fourth sides closest to the main surface 2a, and a fifth side closest to the end surface 2e. The first and second sides are connected at a first vertex, the second and third sides are connected at a second vertex, the third and fourth sides are connected at a third vertex, the fourth and fifth sides are connected at a fourth vertex, and the fifth side is connected to the first side at a fifth vertex. The second and fifth sides are symmetrical with each other with respect to a center line passing through the third vertex between the third and fourth sides, and the third and fourth sides are symmetrical with each other with respect to each other. The first side is longer than the second and fifth sides. The second and fifth sides are each longer than the third and fourth sides.

[0031] The first side extends parallel to direction D2. The second side is inclined with respect to direction D3 so as to move away from end face 2f as it approaches the third side from the first side. The third side is inclined with respect to direction D2 so as to move closer to main face 2a as it approaches the fourth side from the second side. The fourth side is inclined with respect to direction D2 so as to move away from main face 2a as it approaches the fifth side from the third side. The fifth side is inclined with respect to direction D3 so as to move closer to end face 2e as it approaches the first side from the fourth side.

[0032] The coil 3 has coil portions 3a, 3b, 3e, and 3f. Coil portion 3a and coil portion 3b face each other in direction D3. Coil portion 3a is disposed closer to main surface 2a and includes the third and fourth sides mentioned above. Coil portion 3a extends between coil axis AX and main surface 2a. Coil portion 3b is disposed closer to main surface 2b and includes the first side mentioned above. Coil portion 3b extends between coil axis AX and main surface 2b. Coil portions 3e and 3f face each other in direction D2. Coil portion 3e is disposed closer to end surface 2e and includes the fifth side mentioned above. Coil portion 3e extends between coil axis AX and end surface 2e. Coil portion 3f is disposed closer to end surface 2f and includes the second side mentioned above. Coil portion 3f extends between coil axis AX and end surface 2f.

[0033] Each of the coil portions 3a and 3b is adjacent to the coil portion 3e and the coil portion 3f. Each of the coil portions 3a and 3b connects the coil portion 3e and the coil portion 3f. Each of the coil portions 3e and 3f is adjacent to the coil portion 3a and the coil portion 3b. Each of the coil portions 3e and 3f connects the coil portion 3a and the coil portion 3b.

[0034] 4, the coil 3 has a plurality of coil conductors 31 to 37 and a plurality of through-hole conductors T1 to T6. The plurality of coil conductors 31 to 37 are electrically connected to one another by the plurality of through-hole conductors T1 to T6.

[0035] As shown in Figures 3 and 4, the connecting conductor 51 electrically connects the first end 3x of the coil 3 to the external electrode 41. The first end 3x of the coil 3 and the external electrode 41 are physically connected to each other via the connecting conductor 51. The connecting conductor 51 extends from the electrode portion 41a toward the main surface 2a and is connected to the first end 3x. The connecting conductor 52 electrically connects the second end 3y of the coil 3 to the external electrode 42. The second end 3y of the coil 3 and the external electrode 42 are physically connected to each other via the connecting conductor 52. The connecting conductor 52 extends from the electrode portion 42a toward the main surface 2a and is connected to the second end 3y.

[0036] In this embodiment, the lamination direction of the laminated coil component 1 is along direction D1. Fig. 4 shows the multiple layers constituting the laminated coil component 1 as viewed from direction D1. The multiple layers constituting the laminated coil component 1 include an insulator layer 20, coil conductors 31 to 37, through-hole conductors T1 to T6, layers constituting the external electrodes 41 and 42, and connecting conductors 51 and 52. Of the multiple layers constituting the laminated coil component 1, Fig. 4 shows seven layers including the coil conductors 31 to 37, and omits the remaining layers.

[0037] The external electrodes 41 and 42 are each composed of a plurality of stacked electrode layers 410 and 420. In the actual external electrode 41, the electrode layers 410 are integrated to the extent that the boundaries between the electrode layers 410 are not visible. In the actual external electrode 42, the electrode layers 420 are integrated to the extent that the boundaries between the electrode layers 420 are not visible. Each electrode layer 410 and 420 is provided in a recess formed in the corresponding insulator layer 20. The recess formed in each insulator layer 20 forms a pair of depressions corresponding to the external electrodes 41 and 42. Each electrode layer 410 and 420 is made of, for example, a conductive material. The conductive material includes, for example, Ag or Pd. In this embodiment, each electrode layer 410 and 420 is made of a sintered body of a conductive paste containing a powder of a conductive material.

[0038] The connecting conductors 51, 52 are provided in recesses formed in the corresponding insulator layers 20. The connecting conductors 51, 52 are made of, for example, the same material as the electrode layers 410, 420. The connecting conductors 51, 52 are made of, for example, a sintered body of conductive paste. The coil conductors 31 to 37 are provided in recesses formed in the corresponding insulator layers 20. The coil conductors 31 to 37 are made of, for example, the same material as the electrode layers 410, 420. The coil conductors 31 to 37 are made of, for example, a sintered body of conductive paste.

[0039] The coil conductors 31 to 37 form part of the circular track of the coil 3. For example, the coil conductors 31 to 37 have a shape in which part of the loop is interrupted. The coil conductors 31 to 37 each have a path length and a thickness. The path length of each of the coil conductors 31 to 37 is, for example, 80% or more of the length of one turn of the coil 3. In other words, the gap between both ends of each of the coil conductors 31 to 37 is, for example, less than 20% of the length of one turn of the coil 3.

[0040] The coil conductors 31 to 37 have the same width. The width is the length of the coil conductors 31 to 37 in a direction perpendicular to the direction D1 and perpendicular to the paths of the coil conductors 31 to 37. The coil conductors 31 to 37 have the same thickness. The thickness is the length of the coil conductors 31 to 37 in the direction D1. Each layer of the coil conductors 31 to 37 corresponds to each layer constituting the laminated coil component 1. Each layer of the coil conductors 31 to 37 extends along a plane intersecting the direction D1 in which the coil conductors 31 to 37 are arranged. In this embodiment, each layer of the coil conductors 31 to 37 extends along the direction D2 and the direction D3.

[0041] The coil conductors 31 to 37 are arranged in that order in the direction D1. The coil conductor 31 includes the first end 3x of the coil 3. The coil conductor 31 is connected to the electrode portion 41a of the external electrode 41 by the connecting conductor 51. The connecting conductor 51 is connected to the electrode portion 41a at a position closer to the main surface 2a than to the main surface 2b in the direction D3. The coil conductor 31 is included in the same layer as the connecting conductor 51. The coil conductor 31 is adjacent to the outer layer 21 in the direction D1.

[0042] The coil conductor 37 includes the second end 3y of the coil 3. The coil conductor 37 is connected to the electrode portion 42a of the external electrode 42 by a connecting conductor 52. The connecting conductor 52 is connected to the electrode portion 42a at a position closer to the principal surface 2a than to the principal surface 2b in the direction D3. The coil conductor 37 is included in the same layer as the connecting conductor 52. The coil conductor 37 is adjacent to the outer layer 22 in the direction D1.

[0043] Coil conductors 31 and 32 are provided on a portion of coil portion 3e and over the entire lengths of coil portions 3a, 3f, and 3b, respectively. Coil conductors 33 to 35 are provided on a portion of coil portion 3b and over the entire lengths of coil portions 3e, 3a, and 3f, respectively. Coil conductors 36 and 37 are provided on a portion of coil portion 3f and over the entire lengths of coil portions 3e, 3a, and 3b, respectively.

[0044] The through-hole conductors T1 to T6 are provided in six of the multiple layers constituting the multilayer coil component 1, which are arranged between the seven layers including the coil conductors 31 to 37. The through-hole conductor T1 extends in the direction D1 and connects the ends of the coil conductors 31 and 32. The through-hole conductor T2 extends in the direction D1 and connects the ends of the coil conductors 32 and 33. The through-hole conductor T3 extends in the direction D1 and connects the ends of the coil conductors 33 and 34. The through-hole conductor T4 extends in the direction D1 and connects the ends of the coil conductors 34 and 35. The through-hole conductor T5 extends in the direction D1 and connects the ends of the coil conductors 35 and 36. The through-hole conductor T6 extends in the direction D1 and connects the ends of the coil conductors 36 and 37.

[0045] When viewed from direction D1, the through-hole conductors T1 to T6 are spaced apart from one another and arranged in this order along the path of the coil 3. The through-hole conductor T1 is located in the coil portion 3e. The through-hole conductors T2 to T5 are located in the coil portion 3b. The through-hole conductor T6 is located in the coil portion 3f. All of the through-hole conductors T1 to T6 are located closer to the main surface 2b than to the main surface 2a.

[0046] FIG. 5 is a plan view of a laminated coil component according to a comparative example. The laminated coil component 100 according to the comparative example shown in FIG. 5 differs from the laminated coil component 1 shown in FIG. 3 in the shapes of the coil 3 and the connecting conductors 51 and 52. In the laminated coil component 100, the connecting conductor 51 extends from the external electrode 41 toward the principal surface 2b and is connected to the first end 3x of the coil 3. The connecting conductor 52 extends from the external electrode 42 toward the principal surface 2b and is connected to the second end 3y of the coil 3. The coil 3 is wound clockwise around the coil axis AX when viewed from the side surface 2c. The coil 3 extends from the first end 3x between the coil axis AX and the principal surface 2b and between the coil axis AX and the end face 2f. The coil 3 extends from the second end 3y between the coil axis AX and the principal surface 2b and between the coil axis AX and the end face 2e.

[0047] In contrast, in the laminated coil component 1, the connecting conductor 51 is drawn from the external electrode 41 toward the principal surface 2a and connected to the first end 3x of the coil 3. The connecting conductor 52 is drawn from the external electrode 42 toward the principal surface 2a and connected to the second end 3y of the coil 3. The coil 3 is wound counterclockwise around the coil axis AX when viewed from the side surface 2c. The coil 3 extends from the first end 3x between the coil axis AX and the principal surface 2a and between the coil axis AX and the end face 2f. The coil 3 extends from the second end 3y between the coil axis AX and the principal surface 2a and between the coil axis AX and the end face 2e.

[0048] Compared to the laminated coil component 100, in the laminated coil component 1, more conductors are likely to be arranged near the external electrodes 41, 42, and the conductor volume near the external electrodes 41, 42 is likely to increase. Since conductors are harder than the element body 2, arranging more conductors near the external electrodes 41, 42 prevents the element body 2 from being damaged near the external electrodes 41, 42. This improves the adhesion between the element body 2 and the external electrodes 41, 42.

[0049] In the laminated coil component 1, the connecting conductor 51 is connected to the electrode portion 41a at a position closer to the principal surface 2a than to the principal surface 2b. Therefore, more conductors are arranged near the external electrodes 41. This further improves the adhesion between the element body 2 and the external electrodes 41. The connecting conductor 52 is connected to the electrode portion 42a at a position closer to the principal surface 2a than to the principal surface 2b. This further improves the adhesion between the element body 2 and the external electrodes 42.

[0050] FIG. 6 is an exploded view of a laminated coil component according to a modified example. The laminated coil component 1A according to the modified example shown in FIG. 6 differs from the laminated coil component 1 shown in FIG. 4 in that the connecting conductors 51, 52 are also connected to the electrode portions 41b, 42b. In the laminated coil component 1A, of the electrode layers 410 constituting the external electrode 41, the electrode layer 410 connected to the connecting conductor 51 has a larger width in the direction D2 than the other electrode layers 410. In other words, of the electrode layers 420 constituting the external electrode 42, the electrode layer 420 connected to the connecting conductor 52 has a larger width in the direction D2 than the other electrode layers 420. In the laminated coil component 1A, more conductors are disposed near the external electrodes 41, 42. This further improves the adhesion between the element body 2 and the external electrodes 41, 42.

[0051] Although the embodiments have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention. The above-described embodiments and modifications may be combined as appropriate.

[0052] In the laminated coil component 1, the outer layers 21 and 22 have high rigidity, but may have the same rigidity as the other insulator layers 20. The connecting conductor 51 may be connected to the coil portion 3a via the coil portion 3e, and the connecting conductor 52 may be connected to the coil portion 3a via the coil portion 3f. The connecting conductor 51 may be connected to the electrode portion 41a at a position closer to the principal surface 2b than to the principal surface 2a in the direction D3. The connecting conductor 52 may be connected to the electrode portion 42a at a position closer to the principal surface 2b than to the principal surface 2a in the direction D3. [Explanation of symbols]

[0053] 1, 1A, 100... multilayer coil component, 2... element body, 2a, 2b... main surface, 2c, 2d... side surface, 2e, 2f... end surface, 3... coil, 3a, 3b, 3e, 3f... coil portion, 3x... first end, 3y... second end, 31 to 37... coil conductor, 41, 42... external electrode, 41a, 41b, 42a, 41b... electrode portion, 51, 52... connecting conductor, AX... coil axis, D1, D2, D3... direction.

Claims

1. an element body having a first main surface and a second main surface facing each other, a first end surface and a second end surface facing each other, and a first side surface and a second side surface facing each other; a first external electrode embedded in the element body so as to be exposed from the first end surface and the first main surface; a second external electrode embedded in the element body so as to be exposed from the second end surface and the first main surface; a coil having a first end connected to the first external electrode and a second end connected to the second external electrode; Equipped with a coil axis of the coil extends along a direction in which the first side surface and the second side surface face each other; The coil extends from the first end, passing between the coil axis and the first main surface, and reaching between the coil axis and the second end surface. Multilayer coil components.

2. a first connecting conductor connecting the first end and the first external electrode; the coil has a coil portion disposed near the first main surface, the first connecting conductor is connected to the coil portion; The laminated coil component according to claim 1 .

3. a second connecting conductor connecting the second end and the second external electrode; the second connecting conductor is connected to the coil portion; The laminated coil component according to claim 2 .

4. a first connecting conductor connecting the first end and the first external electrode; the first external electrode has a first electrode portion provided on the first end surface and a second electrode portion provided on the first main surface, the first connecting conductor is connected to the first electrode portion; The laminated coil component according to any one of claims 1 to 3.

5. The first connecting conductor is also connected to the second electrode portion. The laminated coil component according to claim 4 .

6. In a direction in which the first principal surface and the second principal surface oppose each other, the first connection conductor is connected to the first electrode portion at a position closer to the first principal surface than to the second principal surface. The laminated coil component according to claim 4 .

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