Laminated coil component

Abstract

A laminated coil component is provided with: 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; and a coil having a first end connected to the first external electrode and a second end connected to the second external electrode, the coil axis of the coil extending in a direction in which the first side surface and the second side surface face each other. The coil extends from the first end to a space between the coil shaft and the first main surface and to a space between the coil shaft and the second end surface.

Description

Technical Field

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

[0002] A laminated coil component comprising an element body, external electrodes provided on the element body, and a coil arranged within the element body is known (for example, Japanese Patent Application Laid-Open No. 2021-34667). In this laminated coil component, the external electrodes are embedded in the element body so as to be exposed from the main surface and end surface of the element body. Summary of the Invention

[0003] When the laminated coil component is welded and mounted on an electronic device and subjected to a fixing strength test relative to the electronic device, the element body may sometimes peel off from the external electrode and break. To prevent such breakage, the fixing strength of the laminated coil component relative to the electronic device substrate is improved, preferably by improving the adhesion between the external electrode and the element body.

[0004] An object of the present disclosure is to provide a laminated coil component capable of improving the adhesion between an external electrode and an element body.

[0005] The present inventors have discovered that when the laminated coil component is subjected to a fixing strength test to a substrate, the element body is broken near the external electrodes, and the element body is separated from the external electrodes.

[0006] (1) One embodiment of the present disclosure provides a stacked coil component comprising: a body having a first main surface and a second main surface opposite to each other, a first end surface and a second end surface opposite to each other, and a first side surface and a second side surface opposite to each other; a first external electrode embedded in the body so as to be exposed from the first end surface and the first main surface; a second external electrode embedded in the body so as to be exposed from the second end surface and the first main surface; and a coil having a first end connected to the first external electrode and a second end connected to the second external electrode, a coil axis of the coil extending in relative directions of the first side surface and the second side surface, and the coil extending from the first end through between the coil axis and the first main surface and reaching between the coil axis and the second end surface.

[0007] In this laminated coil component, the coil extends from the first end connected to the first external electrode, through the space between the coil axis and the first main surface, and then to the space between the coil axis and the second end surface. This structure makes it easier to arrange more conductors near the first and second external electrodes, compared to a structure in which the coil extends from the first end between the coil axis and the second main surface, and then to the space between the coil axis and the second end surface. Conductors are harder than the element body, so arranging more conductors near the first and second external electrodes can prevent damage to the element body near the first and second external electrodes. This improves the adhesion between the element body and the first and second external electrodes.

[0008] (2) The laminated coil component of (1) may further include a first connecting conductor connecting the first end to the first external electrode, wherein the coil includes a coil portion disposed adjacent to the first main surface, and the first connecting conductor is connected to the coil portion. In this case, more conductors are disposed adjacent to the first external electrode. Therefore, the adhesion between the element body and the first external electrode can be further improved.

[0009] (3) The laminated coil component of (2) may further include a second connecting conductor connecting the second end to the second external electrode, wherein the second connecting conductor is connected to the coil portion. In this case, more conductors are arranged near the second external electrode. Therefore, the adhesion between the element body and the second external electrode can be further improved.

[0010] (4) The laminated coil component according to any one of (1) to (3) may further include a first connecting conductor connecting the first end to the first external electrode, wherein the first external electrode includes 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 is connected to the first electrode portion. In this case, the first connecting conductor tends to be longer. Therefore, by arranging more conductors near the first external electrode, the adhesion between the element body and the first external electrode can be further improved.

[0011] (5) In the laminated coil component of (4), the first connecting conductor may also be connected to the second electrode portion. In this case, more conductors are arranged near the first external electrode. Therefore, the adhesion between the element body and the first external electrode can be further improved.

[0012] (6) In the laminated 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 relative direction of the first main surface. In this case, more conductors are arranged near the first external electrode. Therefore, the adhesion between the element body and the first external electrode can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a perspective view of a laminated coil component according to one embodiment.

[0014] Figure 2 When viewed from the main surface 2a Figure 1 A top view of a stacked coil component.

[0015] Figure 3 Observed from the side 2c Figure 1 A top view of a stacked coil component.

[0016] Figure 4 yes Figure 1 Exploded view of the laminated coil assembly.

[0017] Figure 5 It is a top view of a laminated coil component of a comparative example.

[0018] Figure 6 This is an exploded view of a laminated coil component according to a modification. DETAILED DESCRIPTION

[0019] Hereinafter, the embodiments will be described with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and duplicate descriptions will be omitted as appropriate.

[0020] Reference Figures 1 to 4 The structure of the laminated coil component 1 according to this embodiment will be described. Figure 1 This is a perspective view of a laminated coil component according to one embodiment. Figure 2 When viewed from the main surface 2a Figure 1 A top view of a stacked coil component. Figure 3 Observed from the side 2c Figure 1 A top view of the laminated coil component. Figure 3 In FIG, the element body 2 is represented by a dotted line. Figure 4 yes Figure 1 Exploded view of a laminated coil component. The laminated coil component 1 of this embodiment is soldered and mounted on 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.

[0021] like Figures 1 to 3 As shown, 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 edges, and a rectangular parallelepiped shape with rounded corners and edges.

[0022] The element body 2 has a pair of main 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 main surfaces 2a and 2b, the side surfaces 2c and 2d, and the end surfaces 2e and 2f are rectangular. The main 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 stacked coil component 1 is soldered and mounted on an electronic device, the main surface 2a is opposite to the electronic device to be soldered and mounted. The main surfaces 2a and 2b, the side surfaces 2c and 2d, and the end surfaces 2e and 2f are planes. A plane refers to a surface formed with a plane as the goal, and is not limited to a geometrically complete plane. A plane may include curvature and bumps generated during the manufacturing process.

[0023] The direction D3 in which the pair of main surfaces 2a and 2b oppose each other is perpendicular to the main surfaces 2a and 2b, respectively. The direction D1 in which the pair of side surfaces 2c and 2d oppose each other is perpendicular to the side surfaces 2c and 2d, respectively. The direction D2 in which the pair of end surfaces 2e and 2f oppose each other is perpendicular to the end surfaces 2e and 2f, respectively. Direction D3 is perpendicular to both directions D1 and D2. Directions D1 and D2 are mutually perpendicular. A pair of recesses corresponding to the pair of external electrodes 41 and 42 are formed in the element body 2.

[0024] like Figure 4 As shown, the element body 2 includes a plurality of insulating layers 20 stacked in a direction D1. The plurality of insulating layers 20 are integrated to such an extent that the boundaries between the insulating layers 20 cannot be identified. Each insulating layer 20 is made of, for example, a non-magnetic material. Non-magnetic materials include, for example, glass ceramic materials or dielectric materials. Glass components include, for example, borosilicate glass. Dielectric materials include, for example, dielectric ceramics such as BaTiO3, Ba(Ti, Zr)O3, or (Ba, Ca)TiO3. In this embodiment, each insulating layer 20 is made of a sintered body of a green sheet containing a non-magnetic material. Each insulating layer 20 may also be made of a magnetic material.

[0025] The plurality of insulating layers 20 include Figure 2 The pair of outer layers 21, 22 shown (in Figure 4 The outer layers 21 and 22 are located at both ends in the direction D1 and constitute the outermost layer 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 plurality of insulating layers 20 are arranged between the outer layers 21 and 22 in the direction D1, constituting Figure 2 The outer layers 21 and 22 have higher rigidity than the laminate 23, thus preventing damage to the element body 2. Rigidity can be adjusted, for example, by adjusting the filler content. The coil 3, external electrodes 41 and 42, and connecting conductors 51 and 52 are located within the laminate 23 and are not located on the outer layers 21 and 22.

[0026] The thicknesses of the multiple insulating layers 20 are equal. In this specification, "equal" does not necessarily mean simply that the values ​​are identical. Even if the values ​​include slight variations within a predetermined range, manufacturing errors, or measurement errors, they can still be considered equal. The thicknesses of the outer layers 21 and 22 may also differ from the thickness of the insulating layers 20 that constitute the laminate 23.

[0027] The external electrode 41 is embedded in the element body 2 so as to be exposed from the end surface 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 surface 2f and the main surface 2a. When viewed from the direction D1, the external electrodes 41 and 42 have L-shaped cross-sections. When viewed from the direction D1, the recesses corresponding to the external electrodes 41 and 42 formed in the element body 2 have L-shaped sections.

[0028] External electrode 41 includes electrode portion 41a and electrode portion 41b. Electrode portion 41a is exposed from end surface 2e. Electrode portion 41b is exposed from main surface 2a. The surface of electrode portion 41a faces the same direction as end surface 2e. The surface of electrode portion 41b faces the same direction as main surface 2a. Electrode portion 41a and electrode portion 41b are continuous along the ridgeline between end surface 2e and main surface 2a.

[0029] External electrode 42 includes electrode portion 42a and electrode portion 42b. Electrode portion 42a is exposed from end surface 2f. Electrode portion 42b is exposed from main surface 2a. The surface of electrode portion 42a faces the same direction as end surface 2f. The surface of electrode portion 42b faces the same direction as main surface 2a. Electrode portion 42a and electrode portion 42b are continuous along the ridgeline between end surface 2f and main surface 2a.

[0030] In this embodiment, the length of the external electrodes 41 and 42 in direction D3 is longer than the length of the external electrodes 41 and 42 in direction D2. The electrode portions 41b and 42b are arranged so as to be exposed in the same direction as the principal surface 2a. The surfaces of the electrode portions 41b and 42b and the principal surface 2a may be coplanar. The surfaces of the electrode portions 41b and 42b may protrude from the principal surface 2a. The electrode portion 41a is arranged so as to be exposed in the same direction as the end surface 2e. The surface of the electrode portion 41a and the end surface 2e may be coplanar. The surface of the electrode portion 41a may protrude from the end surface 2e. The electrode portion 42a is arranged so as to be exposed in the same direction as the end surface 2f on the end surface 2f. The surface of the electrode portion 42a and the end surface 2f may be coplanar. 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 direction D3 is longer than the length of the electrode portions 41b and 42b in direction D2.

[0031] like Figure 3As shown, the coil 3 and the external electrodes 41, 42 (see Figure 1 ) is connected. Coil 3 has a first end 3x and a second end 3y. First end 3x is connected to external electrode 41 via a connecting conductor 51. Second end 3y is connected to external electrode 42 via a connecting conductor 52. The coil axis AX of coil 3 extends along direction D1. Coil 3 is arranged inside element body 2 and does not appear from element body 2.

[0032] When viewed from side 2c, coil 3 is wound counterclockwise around coil axis AX. Coil 3 repeatedly passes from first end 3x between coil axis AX and principal surface 2a, between coil axis AX and end surface 2f, between coil axis AX and principal surface 2b, and between coil axis AX and end surface 2e, reaching second end 3y. Coil 3 repeatedly passes from second end 3y between coil axis AX and principal surface 2a, between coil axis AX and end surface 2e, between coil axis AX and principal surface 2b, and between coil axis AX and end surface 2f, reaching first end 3x.

[0033] The coil 3 is annular when viewed from the direction D1. The coil 3 is pentagonal when viewed from the direction D1. The pentagon is line-symmetrical in the direction D2 relative to the center line along the direction D3. The pentagon includes a first side located closest to the main surface 2b, a second side located closest to the end surface 2f, a third side and a fourth side located closest to the main surface 2a, and a fifth side located closest to the end surface 2e. The first side and the second side are connected at the first vertex, the second side and the third side are connected at the second vertex, the third side and the fourth side are connected at the third vertex, the fourth side and the fifth side are connected at the fourth vertex, and the fifth side and the first side are connected at the fifth vertex. The second side and the fifth side are line-symmetrical with each other relative to the center line passing through the third vertex between the third side and the fourth side, and the third side and the fourth side are line-symmetrical with each other relative to the center line passing through the third vertex between the third side and the fourth side. The first side is longer than the second side and the fifth side, respectively. Each of the second side and the fifth side is longer than each of the third side and the fourth side.

[0034] The first side extends parallel to direction D2. The second side is inclined relative to direction D3 so as to move away from end surface 2f as it approaches the third side from the first side. The third side is inclined relative to direction D2 so as to move closer to principal surface 2a as it approaches the fourth side from the second side. The fourth side is inclined relative to direction D2 so as to move away from principal surface 2a as it approaches the fifth side from the third side. The fifth side is inclined relative to direction D3 so as to move closer to end surface 2e as it approaches the first side from the fourth side.

[0035] The coil 3 includes coil portions 3a, 3b, 3e, and 3f. The coil portion 3a and the coil portion 3b are opposite to each other in the direction D3. The coil portion 3a is arranged near the main surface 2a and includes the third and fourth sides mentioned above. The coil portion 3a extends between the coil axis AX and the main surface 2a. The coil portion 3b is arranged near the main surface 2b and includes the first side mentioned above. The coil portion 3b extends between the coil axis AX and the main surface 2b. The coil portion 3e and the coil portion 3f are opposite to each other in the direction D2. The coil portion 3e is arranged near the end surface 2e and includes the fifth side mentioned above. The coil portion 3e extends between the coil axis AX and the end surface 2e. The coil portion 3f is arranged near the end surface 2f and includes the second side mentioned above. The coil portion 3f extends between the coil axis AX and the end surface 2f.

[0036] Each coil portion 3a, 3b is adjacent to coil portion 3e and coil portion 3f. Each coil portion 3a, 3b connects coil portion 3e and coil portion 3f. Each coil portion 3e, 3f is adjacent to coil portion 3a and coil portion 3b. Each coil portion 3e, 3f connects coil portion 3a and coil portion 3b.

[0037] like Figure 4 As shown, the coil 3 includes 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 each other by the plurality of through-hole conductors T1 to T6.

[0038] like Figure 3 and Figure 4 As shown, the connecting conductor 51 electrically connects the first end 3x of the coil 3 and the external electrode 41 to each other. 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 side and is connected to the first end 3x. The connecting conductor 52 electrically connects the second end 3y of the coil 3 and the external electrode 42 to each other. 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 side and is connected to the second end 3y.

[0039] In the present embodiment, the stacking direction of the laminated coil component 1 is along the direction D1. Figure 4 The diagram shows the multiple layers constituting the laminated coil component 1 as viewed from the direction D1. The multiple layers constituting the laminated coil component 1 include an insulating layer 20, coil conductors 31 to 37, via-hole conductors T1 to T6, layers constituting external electrodes 41 and 42, and connecting conductors 51 and 52. Figure 4 9 shows seven layers including coil conductors 31 to 37 among the plurality of layers constituting the laminated coil component 1 , and the remaining layers are omitted.

[0040] The external electrodes 41 and 42 are respectively 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 cannot be distinguished. In the actual external electrode 42, the electrode layers 420 are integrated to the extent that the boundaries between the electrode layers 420 cannot be distinguished. Each electrode layer 410 and 420 is provided in a defective portion formed in the corresponding insulating layer 20. A pair of depressions corresponding to the external electrodes 41 and 42 are obtained by utilizing the defective portion formed in each insulating layer 20. Each electrode layer 410 and 420 is composed of, for example, a conductive material. The conductive material contains, for example, Ag or Pd. In the present embodiment, each electrode layer 410 and 420 is composed of a sintered body of a conductive paste containing powder of a conductive material.

[0041] Connecting conductors 51 and 52 are provided in the missing portions formed in the corresponding insulating layer 20. Connecting conductors 51 and 52 are made of, for example, the same material as the electrode layers 410 and 420. Each connecting conductor 51 and 52 is made of, for example, a sintered body of a conductive paste. Coil conductors 31 to 37 are provided in the missing portions formed in the corresponding insulating layer 20. Coil conductors 31 to 37 are made of, for example, the same material as the electrode layers 410 and 420. Each coil conductor 31 to 37 is made of, for example, a sintered body of a conductive paste.

[0042] Coil conductors 31-37 form a portion of the loop path within coil 3. For example, coil conductors 31-37 may have a partially interrupted loop. Each coil conductor 31-37 has a path length and a thickness. The path length of each coil conductor 31-37 is, for example, at least 80% of the length of one turn of coil 3. In other words, the gap between the ends of each coil conductor 31-37 is, for example, less than 20% of the length of one turn of coil 3.

[0043] The widths of the coil conductors 31 to 37 are equal to each other. The width of the coil conductors 31 to 37 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 thicknesses of the coil conductors 31 to 37 are equal to each other. The thickness of the coil conductors 31 to 37 is the length of the coil conductors 31 to 37 in the direction D1. The layers of the coil conductors 31 to 37 correspond to the layers constituting the laminated coil component 1. The layers of the coil conductors 31 to 37 extend along a plane intersecting the direction D1 in which the coil conductors 31 to 37 are arranged. In the present embodiment, the layers of the coil conductors 31 to 37 extend along the directions D2 and D3.

[0044] Coil conductors 31 to 37 are arranged in this order in direction D1. Coil conductor 31 includes first end 3x of coil 3. Coil conductor 31 is connected to electrode portion 41a of external electrode 41 via connecting conductor 51. Connecting conductor 51 is connected to electrode portion 41a at a position closer to principal surface 2a than principal surface 2b in direction D3. Coil conductor 31 is included in the same layer as connecting conductor 51. Coil conductor 31 is adjacent to outer layer 21 in direction D1.

[0045] Coil conductor 37 includes second end 3y of coil 3. Coil conductor 37 is connected to electrode portion 42a of external electrode 42 via connecting conductor 52. Connecting conductor 52 is connected to electrode portion 42a at a position closer to principal surface 2a than principal surface 2b in direction D3. Coil conductor 37 is included in the same layer as connecting conductor 52. Coil conductor 37 is adjacent to outer layer 22 in direction D1.

[0046] Coil conductors 31 and 32 are each provided over a portion of coil portion 3e and the total length of coil portions 3a, 3f, and 3b. Coil conductors 33 to 35 are each provided over a portion of coil portion 3b and the total length of coil portions 3e, 3a, and 3f. Coil conductors 36 and 37 are each provided over a portion of coil portion 3f and the total length of coil portions 3e, 3a, and 3b.

[0047] Through-hole conductors T1 to T6 are respectively provided in the plurality of layers constituting the laminated coil component 1, and are arranged in six layers between the seven layers including the coil conductors 31 to 37. Through-hole conductor T1 extends in direction D1 and connects the ends of the coil conductors 31 and 32. Through-hole conductor T2 extends in direction D1 and connects the ends of the coil conductors 32 and 33. Through-hole conductor T3 extends in direction D1 and connects the ends of the coil conductors 33 and 34. Through-hole conductor T4 extends in direction D1 and connects the ends of the coil conductors 34 and 35. Through-hole conductor T5 extends in direction D1 and connects the ends of the coil conductors 35 and 36. Through-hole conductor T6 extends in direction D1 and connects the ends of the coil conductors 36 and 37.

[0048] When viewed from direction D1, via-hole conductors T1 to T6 are spaced apart from each other and arranged in this order along the path of coil 3. Via-hole conductor T1 is located in coil portion 3e. Via-hole conductors T2 to T5 are located in coil portion 3b. Via-hole conductor T6 is located in coil portion 3f. Via-hole conductors T1 to T6 are all located closer to principal surface 2b than principal surface 2a.

[0049] Figure 5 It is a top view of a laminated coil component of a comparative example. Figure 5 The laminated coil component 100 of the comparative example shown is different from the laminated coil component 100 in terms of the shapes of the coil 3 and the connecting conductors 51 and 52. Figure 3The laminated coil component 1 shown is different. In the laminated coil component 100, the connecting conductor 51 extends from the external electrode 41 to the main surface 2b side and is connected to the first end 3x of the coil 3. The connecting conductor 52 extends from the external electrode 42 to the main surface 2b side and is connected to the second end 3y of the coil 3. When viewed from the side 2c, the coil 3 is wound clockwise around the coil axis AX. The coil 3 extends in a manner that passes between the coil axis AX and the main surface 2b from the first end 3x and reaches between the coil axis AX and the end surface 2f. The coil 3 extends in a manner that passes between the coil axis AX and the main surface 2b from the second end 3y and reaches between the coil axis AX and the end surface 2e.

[0050] In contrast, in the stacked coil component 1, the connecting conductor 51 is led out from the external electrode 41 to the main surface 2a side and is connected to the first end 3x of the coil 3. The connecting conductor 52 is led out from the external electrode 42 to the main surface 2a side and is connected to the second end 3y of the coil 3. When viewed from the side 2c, the coil 3 is wound counterclockwise around the coil axis AX. The coil 3 extends in a manner that passes between the coil axis AX and the main surface 2a and reaches between the coil axis AX and the end surface 2f. The coil 3 extends in a manner that passes between the coil axis AX and the main surface 2a and reaches between the coil axis AX and the end surface 2e from the second end 3y.

[0051] Compared to the laminated coil component 100, the laminated coil component 1 facilitates the placement of more conductors near the external electrodes 41 and 42, which in turn increases the volume of the conductors near the external electrodes 41 and 42. Since conductors are harder than the element body 2, placing more conductors near the external electrodes 41 and 42 can prevent the element body 2 from breaking near the external electrodes 41 and 42. This improves the adhesion between the element body 2 and the external electrodes 41 and 42.

[0052] In the laminated coil component 1, 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. Therefore, more conductors are arranged near the external electrode 41. This further improves the adhesion between the element body 2 and the external electrode 41. The connecting conductor 52 is connected to the electrode portion 42a at a position closer to the main surface 2a than to the main surface 2b. Therefore, more conductors are arranged near the external electrode 42. This further improves the adhesion between the element body 2 and the external electrode 42.

[0053] Figure 6 This is an exploded view of a laminated coil component according to a modification. Figure 6 The laminated coil component 1A of the modified example shown is different from the laminated coil component 1A in that the connection conductors 51 and 52 are also connected to the electrode portions 41b and 42b. Figure 4The laminated coil component 1 shown is different. In laminated coil component 1A, the width of the electrode layer 410 that is connected to the connecting conductor 51, among the electrode layers 410 that constitute the external electrode 41, in direction D2 is wider than the width of the other electrode layers 410 in direction D2. It can also be said that the width of the electrode layer 420 that is connected to the connecting conductor 52, among the electrode layers 420 that constitute the external electrode 42, in direction D2 is wider than the width of the other electrode layers 420 in direction D2. In laminated coil component 1A, more conductors are arranged near the external electrodes 41 and 42. This further improves the adhesion between the element body 2 and the external electrodes 41 and 42.

[0054] Although the embodiments have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. The above-described embodiments and modifications can also be combined as appropriate.

[0055] In the laminated coil component 1, the outer layers 21 and 22 have high rigidity, but may also have the same rigidity as the other insulating 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 main surface 2b than the main surface 2a in the direction D3. The connecting conductor 52 may be connected to the electrode portion 42a at a position closer to the main surface 2b than the main surface 2a in the direction D3.

Claims

1. A laminated coil component comprising: A 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; as well as a coil having a first end connected to the first external electrode and a second end connected to the second external electrode, The coil axis of the coil extends along the opposite directions of the first side surface and the second side surface. The coil extends from the first end through between the coil axis and the first main surface and reaches between the coil axis and the second end surface.

2. The laminated coil component according to claim 1, wherein further comprising a first connection conductor connecting the first end and the first external electrode, The coil has a coil portion disposed close to the first main surface. The first connecting conductor is connected to the coil portion.

3. The laminated coil component according to claim 2, wherein further comprising a second connection conductor connecting the second end and the second external electrode, The second connecting conductor is connected to the coil portion.

4. The laminated coil component according to any one of claims 1 to 3, wherein further comprising a first connection conductor connecting the first end and the first external electrode, The first external electrode includes 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.

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

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