Multilayer coil component

Abstract

To provide a multilayer coil component in which degradation of characteristics is suppressed.SOLUTION: A multilayer coil component 1 includes an element body 2, a coil 7, and external electrodes 3, 4. The element body 2 includes a principal surface 2a, side surfaces 2b, 2c facing each other in a first direction D1, and a pair of end surfaces 2d, 2e facing each other in a second direction. The external electrodes 3, 4 are electrically connected to the coil 7. The coil 7 has a plurality of coil conductors 71-77 lined up in the first direction D1. The external electrodes 3, 4 have a plurality of electrode conductors 31-35, 41-45 lined up in the first direction D1, respectively. The plurality of coil conductors 72-76 are positioned in the same layer as the plurality of electrode conductors 31-35, 41-45. The coil conductor 71 is not positioned in the same layer as any one of the plurality of electrode conductors 31-35, 41-45. The coil conductor 77 is not positioned in the same layer as any one of the plurality of electrode conductors 31-35, 41-45.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] A laminated coil component is known that includes an element body, a coil having a plurality of coil conductors connected to each other, and a pair of external electrodes each having a plurality of electrode conductors connected to each other (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-153009 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the laminated coil component described in Patent Document 1, for example, when the environmental temperature changes, the external electrodes may peel off from the element body due to a difference in the thermal expansion coefficient or thermal contraction coefficient between the element body and the external electrodes. If the external electrodes peel off from the element body, the characteristics of the laminated coil component may deteriorate. The characteristics of the laminated coil component include, for example, electrical characteristics or magnetic characteristics.

[0005] Each of the aspects of the present invention has an object to provide a laminated coil component that suppresses deterioration of characteristics. [Means for solving the problem]

[0006] A laminated coil component according to a first aspect of the present invention includes an element body, a coil, and an external electrode. The element body has a main surface constituting a mounting surface, first and second side surfaces facing each other in a first direction, and a pair of end surfaces facing each other in the second direction. The coil is disposed within the element body. The external electrode is electrically connected to the coil and disposed on the element body. The coil has a plurality of coil conductors arranged in the first direction and connected to each other. The external electrode has a plurality of electrode conductors arranged in the first direction and connected to each other. The plurality of coil conductors include a plurality of first coil conductors, a second coil conductor, and a third coil conductor. The plurality of first coil conductors are located in the same layer as the plurality of electrode conductors. The second coil conductor is not located in the same layer as any of the plurality of electrode conductors, and is electrically connected to a first outermost electrode conductor located closest to the first side surface among the plurality of electrode conductors. The third coil conductor is not located in the same layer as any of the plurality of electrode conductors, and is electrically connected to a second outermost electrode conductor located closest to the second side surface among the plurality of electrode conductors.

[0007] In the first aspect, the electrode conductors are located in the same layer as the first coil conductors, but not in the same layer as the second coil conductor and the third coil conductor. Therefore, the volume of the external electrode relative to the element body in the first direction is smaller than in a configuration in which the electrode conductors are also located in the same layer as the second coil conductor and the third coil conductor. Therefore, in the first aspect, the external electrode is less likely to peel off from the element body due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body and the external electrode. As a result, deterioration of the characteristics of the laminated coil component is suppressed.

[0008] In the first aspect, each of the first outermost electrode conductor and the second outermost electrode conductor may have a first conductor portion arranged so as to be exposed at least on the main surface, and a second conductor portion that is continuous with the first conductor portion and protrudes into the body when viewed from the first direction. The second coil conductor may overlap with the second conductor portion of the first outermost electrode conductor when viewed from the first direction, and may be electrically connected to the second conductor portion of the first outermost electrode conductor. The third coil conductor may overlap with the second conductor portion of the second outermost electrode conductor when viewed from the first direction, and may be electrically connected to the second conductor portion of the second outermost electrode conductor. When the first outermost electrode conductor and the second outermost electrode conductor each have a second conductor portion protruding into the body when viewed from the first direction, and the second coil conductor and the third coil conductor each overlap with the second conductor portion when viewed from the first direction, the connection between the coil and the external electrode is made more reliable.

[0009] In the first aspect, each of the second coil conductor and the third coil conductor may have a third conductor portion constituting a part of the annular track of the coil, and a fourth conductor portion that is continuous with the third conductor portion and protrudes outside the annular track when viewed from the first direction. The fourth conductor portion of the second coil conductor may overlap with the second conductor portion of the first outermost electrode conductor when viewed from the first direction, and may be electrically connected to the second conductor portion of the first outermost electrode conductor. The fourth conductor portion of the third coil conductor may overlap with the second conductor portion of the second outermost electrode conductor when viewed from the first direction, and may be electrically connected to the second conductor portion of the second outermost electrode conductor. When the second coil conductor and the third coil conductor each have a fourth conductor portion that protrudes outside the annular orbit of the coil when viewed from the first direction, and the fourth conductor portion of each of the second coil conductor and the third coil conductor overlaps with the second conductor portion of each of the first outermost electrode conductor and the second outermost electrode conductor when viewed from the first direction, the connection between the coil and the external electrode is made more reliable.

[0010] In the first aspect, the second conductor portion of the first outermost electrode conductor and the fourth conductor portion of the second coil conductor may be connected in a first direction. The second conductor portion of the second outermost electrode conductor and the fourth conductor portion of the third coil conductor may be connected in the first direction. When the second conductor portion of the first outermost electrode conductor and the fourth conductor portion of the second coil conductor are connected in a first direction, and the second conductor portion of the second outermost electrode conductor and the fourth conductor portion of the third coil conductor are connected in the first direction, the second conductor portion and the fourth conductor portion located in different layers are appropriately connected, and the electrical connection between the coil and the external electrodes is more reliably maintained, thereby suppressing deterioration of the characteristics of the laminated coil component.

[0011] In the first aspect, the first coil conductor located in the same layer as the first outermost electrode conductor may overlap the second coil conductor when viewed from the first direction and be continuous with the first outermost electrode conductor. The first coil conductor located in the same layer as the second outermost electrode conductor may overlap the third coil conductor when viewed from the first direction and be continuous with the second outermost electrode conductor. When the first coil conductor located in the same layer as the first outermost electrode conductor is continuous with the first outermost electrode conductor, a continuous portion between the first coil conductor located in the same layer as the first outermost electrode conductor and the first outermost electrode conductor may overlap with the second coil conductor in the first direction. Similarly, when the first coil conductor located in the same layer as the second outermost electrode conductor is continuous with the second outermost electrode conductor, a continuous portion between the first coil conductor located in the same layer as the second outermost electrode conductor and the second outermost electrode conductor may overlap with the third coil conductor in the first direction. When an overlapping portion is formed, the direct current resistance of the coil is reduced, thereby improving the characteristics of the laminated coil component.

[0012] A laminated coil component according to a second aspect of the present invention includes an element body, a coil, and an external electrode. The element body has a main surface constituting a mounting surface, a pair of side surfaces facing each other in a first direction, and a pair of end surfaces facing each other in a second direction. The coil is disposed within the element body such that the coil axial direction is along the first direction. The external electrode is electrically connected to the coil and disposed on the element body. The length of the external electrode in the first direction is smaller than the length of the coil in the first direction.

[0013] In the second aspect, the length of the external electrodes in the first direction is smaller than the length of the coil in the first direction. Therefore, in the second aspect, the volume of the external electrodes relative to the element body in the first direction is smaller than in a configuration in which the length of the external electrodes in the first direction is equal to or greater than the length of the coil in the first direction. Therefore, in the second aspect, the external electrodes are less likely to peel off from the element body due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body and the external electrodes. As a result, deterioration of the characteristics of the laminated coil component is suppressed.

[0014] A laminated coil component according to a third aspect of the present invention includes an element body, a coil, and an external electrode. The element body has a main surface constituting a mounting surface, a pair of side surfaces facing each other in a first direction, and a pair of end surfaces facing each other in a second direction. The coil is disposed within the element body such that the coil axial direction is along the first direction. The external electrode is electrically connected to the coil and is disposed on the element body. When the external electrode and the coil are viewed from a direction perpendicular to the first direction, both ends of the coil in the first direction are exposed from the external electrode in the first direction.

[0015] In the third aspect, when the external electrode and the coil are viewed from a direction perpendicular to the first direction, both ends of the coil in the first direction are exposed from the external electrode in the first direction. That is, the length of the external electrode in the first direction is smaller than the length of the coil in the first direction. Therefore, in the third aspect, the volume of the external electrode relative to the element body in the first direction is smaller than in a configuration in which both ends of the coil in the first direction are not exposed from the external electrode in the first direction. Therefore, in the third aspect, the external electrode is less likely to peel off from the element body due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body and the external electrode. As a result, deterioration of the characteristics of the laminated coil component is suppressed.

[0016] In each of the above aspects, the external electrodes may be disposed on the element body so as to be exposed only at a corresponding one of a pair of end faces and at the main surface. When the external electrodes are arranged on the element body so as to be exposed only on a corresponding one of a pair of end faces and on the main surface, a contact area with an electronic device when the laminated coil component is mounted on the electronic device is sufficiently secured within the exposed surfaces of the external electrodes.

[0017] In each of the above aspects, the external electrodes may be disposed on the element body so as to be exposed only on the main surface. When the external electrodes are arranged on the element body so as to be exposed only on the main surfaces, the volume of the external electrodes relative to the element body is small, making it more difficult for the external electrodes to peel off from the element body due to the difference in thermal expansion coefficient or thermal contraction coefficient between the element body and the external electrodes, thereby further suppressing deterioration of the characteristics of the multilayer coil component.

[0018] A laminated coil component according to a fourth aspect of the present invention includes an element body, a coil, and an external electrode. The coil is disposed within the element body. The external electrode is electrically connected to the coil and disposed on the element body. The coil has a plurality of coil conductors arranged in a coil axial direction of the coil and connected to each other. The plurality of coil conductors include a pair of outermost coil conductors located outermost in the coil axial direction. The external electrode has a plurality of electrode conductors arranged in a coil axial direction and connected to each other. The plurality of electrode conductors include a pair of outermost electrode conductors located outermost in the coil axial direction. Each of the pair of outermost electrode conductors is not located in the same layer as the pair of outermost coil conductors and is electrically connected to the coil.

[0019] In the fourth aspect, the coil has a plurality of coil conductors arranged in the coil axis direction, and the external electrode has a plurality of electrode conductors arranged in the coil axis direction. Each of the pair of outermost electrode conductors is not located in the same layer as the pair of outermost coil conductors. Therefore, the volume of the external electrode relative to the element body in the first direction is smaller than in a configuration in which each of the pair of outermost electrode conductors is located in the same layer as the pair of outermost coil conductors. Therefore, in the fourth aspect, the external electrode is less likely to peel off from the element body due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body and the external electrode. As a result, deterioration of the characteristics of the laminated coil component is suppressed. Effect of the Invention

[0020] According to the above aspects of the present invention, a laminated coil component capable of suppressing deterioration in characteristics is provided. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view showing a laminated coil component according to a first embodiment. [Diagram 2] FIG. 1 is a perspective view showing a laminated coil component according to a first embodiment. [Diagram 3] FIG. 1 is a plan view showing a laminated coil component according to a first embodiment. [Figure 4] FIG. 2 is an exploded view showing the configuration of the laminated coil component according to the first embodiment. [Diagram 5] 3A and 3B are diagrams illustrating configurations of a coil conductor and an electrode conductor. [Figure 6] 3A and 3B are diagrams illustrating configurations of a coil conductor and an electrode conductor. [Figure 7] FIG. 13 is a plan view showing a laminated coil component according to a modified example. [Figure 8] FIG. 13 is an exploded view showing a configuration of a laminated coil component according to a modified example. [Figure 9] FIG. 11 is a perspective view showing a laminated coil component according to a second embodiment. [Figure 10] FIG. 11 is a plan view showing a laminated coil component according to a second embodiment. [Figure 11] FIG. 6 is an exploded view showing the configuration of a laminated coil component according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same elements or elements having the same functions will be denoted by the same reference numerals, and duplicated description will be omitted.

[0023] First embodiment The configuration of a laminated coil component 1 according to a first embodiment will be described with reference to Fig. 1 to Fig. 4. Figs. 1 and 2 are perspective views showing a laminated coil component according to this embodiment. Fig. 3 is a plan view showing the laminated coil component. Fig. 4 is an exploded view showing the configuration of the laminated coil component. The laminated coil component 1 includes an element body 2, a pair of external electrodes 3 and 4, and a coil 7.

[0024] 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. The element body 2 has a main surface 2a, a pair of side surfaces 2b, 2c, and a pair of end surfaces 2d, 2e. The pair of side surfaces 2b, 2c face each other. The direction in which the pair of side surfaces 2b, 2c face each other is a first direction D1. The pair of end surfaces 2d, 2e face each other. The direction in which the pair of end surfaces 2d, 2e face each other is a second direction D2. The direction perpendicular to the main surface 2a is a third direction D3. In this embodiment, the first direction D1 is the short side direction of the element body 2. The second direction D2 is the longitudinal direction of the element body 2 and is perpendicular to the first direction D1. The third direction D3 is the height direction of the element body 2 and is perpendicular to the first direction D1 and the second direction D2. For example, when side surface 2b constitutes a first side surface, side surface 2c constitutes a second side surface.

[0025] The main surface 2a is aligned along the first direction D1 and the second direction D2. The pair of side surfaces 2b, 2c are aligned along the second direction D2 and the third direction D3. The pair of end surfaces 2d, 2e are aligned along the first direction D1 and the third direction D3. The main surface 2a connects the pair of side surfaces 2b, 2c together. The main surface 2a also connects the pair of end surfaces 2d, 2e together. The laminated coil component 1 is mounted on an electronic device, for example, by soldering. The electronic device is, for example, a circuit board or an electronic component. In the laminated coil component 1, the main surface 2a constitutes a mounting surface that faces the electronic device.

[0026] The element body 2 has a plurality of insulator layers 21 as shown in FIG. 4. The element body 2 is configured by stacking a plurality of insulator layers 21 in a first direction D1. In the actual element body 2, the insulator layers 21 may be integrated to such an extent that the boundaries between the insulator layers 21 are not visible. Each insulator layer 21 is configured, for example, of a magnetic material. The magnetic material includes, for example, a Ni-Cu-Zn ferrite material, a Ni-Cu-Zn-Mg ferrite material, or a Ni-Cu ferrite material. Each insulator layer 21 is configured, for example, of a sintered body of a green sheet including a magnetic material. The magnetic material configuring each insulator layer 21 may include an Fe alloy. Each insulator layer 21 may be configured of a non-magnetic material. The non-magnetic material includes, for example, a glass ceramic material or a dielectric material.

[0027] The pair of external electrodes 3, 4 are electrically connected to the coil 7 and are arranged on the element body 2. As shown in FIG. 3, the pair of external electrodes 3, 4 are arranged at both ends of the element body 2 in the second direction D2. The pair of external electrodes 3, 4 are spaced apart from each other in the second direction D2. The external electrode 3 is arranged on the end face 2d side. The external electrode 4 is arranged on the end face 2e side. Each of the external electrodes 3, 4 is embedded in the element body 2. When viewed from the first direction D1, each of the external electrodes 3, 4 has a substantially L-shape. In this embodiment, the external electrode 3 is arranged on the element body 2 so as to be exposed only on the main surface 2a and the end face 2d. The surface of the external electrode 3 exposed from the element body 2 is flush with each of the main surface 2a and the end face 2d. The external electrode 4 is arranged on the element body 2 so as to be exposed only on the main surface 2a and the end face 2e. The surface of the external electrode 4 exposed from the element body 2 is flush with each of the main surface 2a and the end face 2e.

[0028] The external electrode 3 has electrode portions 3a and 3b. The electrode portion 3a is integrally formed with the electrode portion 3b. The electrode portion 3a is connected to the electrode portion 3b at a ridge portion of the element body 2. The electrode portion 3a extends along the first direction D1 and the third direction D3. The electrode portion 3a has a rectangular shape when viewed from the second direction D2. The electrode portion 3a has a thickness in the second direction D2. The electrode portion 3b extends along the first direction D1 and the second direction D2. The electrode portion 3b has a rectangular shape when viewed from the third direction D3. The electrode portion 3b has a thickness in the third direction D3.

[0029] The external electrode 3 has a plurality of electrode conductors 31, 32, 33, 34, and 35 shown in FIG. 4. The external electrode 3 is configured by stacking a plurality of electrode conductors 31 to 35 in a first direction D1. In this embodiment, the number of the plurality of electrode conductors 31 to 35 is "5". The electrode conductors 31, 32, 33, 34, and 35 are stacked in this order in a direction from the side surface 2b toward the side surface 2c. The plurality of electrode conductors 31 to 35 are arranged side by side in the first direction D1 and connected to each other. The plurality of electrode conductors 31 to 35 being connected to each other means that the plurality of electrode conductors 31 to 35 are electrically and physically connected to each other. In the actual external electrode 3, the electrode conductors 31 to 35 may be integrated to such an extent that the boundaries between the electrode conductors 31 to 35 are not visible.

[0030] Each of the electrode conductors 31-35 contains a conductive material. The conductive material is, for example, Ag or Pd. Each of the electrode conductors 31-35 is configured, for example, as a sintered body of a conductive paste containing a conductive material powder. The conductive material powder is, for example, Ag powder or Pd powder. A plating layer may be formed on the surface of the external electrode 3. The plating layer is, for example, formed by electroplating or electroless plating. The plating layer contains, for example, Ni, Sn, or Au.

[0031] The electrode conductor 31 is an outermost electrode conductor located at the outermost position in the first direction D1 among the electrode conductors 31 to 35. More specifically, the electrode conductor 31 is a first outermost electrode conductor located closest to the side surface 2b among the electrode conductors 31 to 35. The electrode conductor 31 has conductor portions C1a and C1b. The conductor portion C1a is a first conductor portion arranged so as to be exposed at least on the main surface 2a. In this embodiment, the conductor portion C1a is exposed on the main surface 2a and the end surface 2d. The conductor portion C1a has a substantially L-shape when viewed from the first direction D1. The conductor portion C1b is a second conductor portion protruding into the element body 2 when viewed from the first direction D1. The conductor portion C1b extends in a direction intersecting the second direction D2 and the third direction D3 when viewed from the first direction D1. The conductor portion C1b is continuous with the conductor portion C1a of the electrode conductor 31.

[0032] The electrode conductors 32 to 34 are electrode conductors located between the electrode conductor 31 and the electrode conductor 35 in the first direction D1. The electrode conductor 35 is an outermost electrode conductor located at the outermost position in the first direction D1 among the electrode conductors 31 to 35. More specifically, the electrode conductor 35 is a second outermost electrode conductor located closest to the side surface 2c among the electrode conductors 31 to 35. Each of the electrode conductors 32 to 35 has a conductor portion C1a arranged so as to be exposed at least to the main surface 2a, similar to the electrode conductor 31. In this embodiment, the shape and position of the conductor portion C1a of each of the electrode conductors 32 to 35 are the same as the shape and position of the conductor portion C1a of the electrode conductor 31. Therefore, the conductor portions C1a of the electrode conductors 31 to 35 overlap each other when viewed from the first direction D1. Unlike the electrode conductor 31, each of the electrode conductors 32 to 35 does not have a conductor portion C1b.

[0033] The external electrode 4 has electrode portions 4a and 4b. The electrode portion 4a is integrally formed with the electrode portion 4b. The electrode portion 4a is connected to the electrode portion 4b at a ridge portion of the element body 2. The electrode portion 4a extends along the first direction D1 and the third direction D4. The electrode portion 4a has a rectangular shape when viewed from the second direction D2. The electrode portion 4a has a thickness in the second direction D2. The electrode portion 4b extends along the first direction D1 and the second direction D2. The electrode portion 4b has a rectangular shape when viewed from the third direction D4. The electrode portion 4b has a thickness in the third direction D4.

[0034] The external electrode 4 has a plurality of electrode conductors 41, 42, 43, 44, and 45 shown in FIG. 4. The external electrode 4 is configured by stacking a plurality of electrode conductors 41 to 45 in a first direction D1. In this embodiment, the number of the plurality of electrode conductors 41 to 45 is "5". The electrode conductor 41, the electrode conductor 42, the electrode conductor 43, the electrode conductor 44, and the electrode conductor 45 are stacked in this order in a direction from the side surface 2b toward the side surface 2c. The plurality of electrode conductors 41 to 45 are arranged side by side in the first direction D1 and are connected to each other. The plurality of electrode conductors 41 to 45 being connected to each other means that the plurality of electrode conductors 41 to 45 are electrically and physically connected to each other. In the actual external electrode 4, the electrode conductors 41 to 45 may be integrated to such an extent that the boundaries between the electrode conductors 41 to 45 are not visible.

[0035] Each of the electrode conductors 41-45 contains a conductive material. The conductive material is, for example, Ag or Pd. Each of the electrode conductors 41-45 is configured, for example, as a sintered body of a conductive paste containing a conductive material powder. The conductive material powder is, for example, Ag powder or Pd powder. A plating layer may be formed on the surface of the external electrode 4. The plating layer is, for example, formed by electroplating or electroless plating. The plating layer contains, for example, Ni, Sn, or Au.

[0036] The electrode conductor 41 is an outermost electrode conductor located outermost in the first direction D1 among the multiple electrode conductors 41-45. More specifically, the electrode conductor 41 is a first outermost electrode conductor located closest to the side surface 2b among the multiple electrode conductors 41-45. The electrode conductor 41 has a conductor portion C2a. The conductor portion C2a is a first conductor portion arranged so as to be exposed at least on the main surface 2a. In this embodiment, the conductor portion C2a is exposed on the main surface 2a and the end surface 2e. The conductor portion C2a is substantially L-shaped when viewed from the first direction D1.

[0037] The electrode conductors 42 to 44 are electrode conductors located between the electrode conductor 41 and the electrode conductor 45 in the first direction D1. Like the electrode conductor 41, each of the electrode conductors 42 to 44 has a conductor portion C2a arranged so as to be exposed at least on the main surface 2a. In this embodiment, the shape and position of the conductor portion C2a of each of the electrode conductors 42 to 44 are the same as the shape and position of the conductor portion C2a of the electrode conductor 41.

[0038] The electrode conductor 45 is an outermost electrode conductor located at the outermost position in the first direction D1 among the electrode conductors 41 to 45. More specifically, the electrode conductor 45 is a second outermost electrode conductor located closest to the side surface 2c among the electrode conductors 41 to 45. The electrode conductor 45 has a conductor portion C2a and a conductor portion C2b. In this embodiment, the shape and position of the conductor portion C2a of the electrode conductor 45 are the same as the shape and position of the conductor portion C2a of the electrode conductor 41. Therefore, the conductor portions C2a of the electrode conductors 41 to 45 overlap each other when viewed from the first direction D1. The conductor portion C2b is a second conductor portion protruding into the element body 2 when viewed from the first direction D1. The conductor portion C2b extends in a direction intersecting the second direction D2 and the third direction D3 when viewed from the first direction D1. The conductor portion C2b is continuous with the conductor portion C2a of the electrode conductor 45.

[0039] As shown in FIG. 3, the coil 7 is disposed in the element body 2 such that the coil axis direction of the coil 7 is along the first direction D1. The coil 7 has a plurality of coil conductors 71, 72, 73, 74, 75, 76, and 77. The coil 7 is configured by stacking a plurality of coil conductors 71 to 77 in the first direction D1. In this embodiment, the number of the plurality of coil conductors 71 to 77 is "7". The number of the plurality of coil conductors in the coil 7 is greater than the number of the plurality of electrode conductors in each of the pair of external electrodes 3 and 4. In other words, each of the pair of external electrodes 3 and 4 is configured with a smaller number of layers than the coil 7. The coil conductor 71, the coil conductor 72, the coil conductor 73, the coil conductor 74, the coil conductor 75, the coil conductor 76, and the coil conductor 77 are stacked in this order in the direction from the side surface 2b toward the side surface 2c. The plurality of coil conductors 71 to 77 are arranged in the first direction D1, i.e., in the coil axis direction of the coil 7.

[0040] The multiple coil conductors 71 to 77 are connected to each other. The multiple coil conductors 71 to 77 being connected to each other means that the multiple coil conductors 71 to 77 are electrically and physically connected to each other. In an actual coil 7, the coil conductors 71 to 77 may be integrated to the extent that the boundaries between the coil conductors 71 to 77 are not visible.

[0041] Each of the coil conductors 71-77 contains a conductive material. The conductive material is, for example, Ag or Pd. Each of the coil conductors 71-77 is formed, for example, as a sintered body of a conductive paste containing a conductive material powder. The conductive material powder is, for example, Ag powder or Pd powder. Each of the coil conductors 71-77 may contain the same conductive material as each of the external electrodes 3, 4, or may contain a conductive material different from that of each of the external electrodes 3, 4.

[0042] As shown in FIG. 3, the coil conductor 71 is an outermost coil conductor that is located outwardly in the coil axis direction of the coil 7 among the multiple coil conductors 71 to 77. The coil conductor 71 is located at an end of the coil 7 in the coil axis direction of the coil 7. The coil conductor 71 is located closest to the side surface 2b among the multiple coil conductors 71 to 77. The coil conductor 71 is a second coil conductor that is located between the coil conductor 72 and the side surface 2b. As shown in FIG. 4, the coil conductor 71 is not located in the same layer as the multiple electrode conductors 31 to 35 and the multiple electrode conductors 41 to 45. That is, the electrode conductors 31 and 41 that are the outermost electrode conductors are not located in the same layer as the coil conductor 71 that is the outermost coil conductor. The electrode conductors 31 and 41 are located inside the coil 7 with respect to the coil conductor 71 in the first direction D1.

[0043] The coil conductor 71 has conductor portions C3a and C3b. The conductor portion C3a of the coil conductor 71 is a third conductor portion that constitutes a part of the annular orbit of the coil 7. The conductor portion C3a of the coil conductor 71 extends so as to surround the coil axis of the coil 7. One end of the conductor portion C3a of the coil conductor 71 is connected to one end of the conductor portion C3a of the coil conductor 72 in the first direction D1. One end of the conductor portion C3a of the coil conductor 71 is physically connected directly to one end of the conductor portion C3a of the coil conductor 72. One end of the conductor portion C3a of the coil conductor 71 may be integrated with one end of the conductor portion C3a of the coil conductor 72 to the extent that the boundary between them is not visible. The conductor portion C3b of the coil conductor 71 is a fourth conductor portion that protrudes outside the annular orbit of the coil 7 when viewed from the first direction D1. The conductor portion C3b of the coil conductor 71 extends in a direction intersecting the second direction D2 and the third direction D3 when viewed from the first direction D1. The conductor portion C3b of the coil conductor 71 is continuous with the conductor portion C3a of the coil conductor 71. In this embodiment, one end of the conductor portion C3b of the coil conductor 71 is continuous with the other end of the conductor portion C3a of the coil conductor 71. The other end of the conductor portion C3b of the coil conductor 71 is connected to the conductor portion C1b of the electrode conductor 31 in the first direction D1. The other end of the conductor portion C3b of the coil conductor 71 is physically connected directly to the conductor portion C1b of the electrode conductor 31. The other end of the conductor portion C3b of the coil conductor 71 may be integrated with the conductor portion C1b of the electrode conductor 31 to such an extent that the boundary between the conductor portion C3b of the coil conductor 71 and the conductor portion C1b of the electrode conductor 31 is not visible.

[0044] The coil conductors 72-76 are a plurality of first coil conductors located in the same layer as the electrode conductors 31-35 and the electrode conductors 41-45. Each of the coil conductors 72-76 has a conductor portion C3a that constitutes a part of the annular track of the coil 7, similar to the coil conductor 71. The conductor portion C3a of each of the coil conductors 72-76 extends so as to surround the coil axis of the coil 7. The coil conductor 72 is located in the same layer as the electrode conductors 31 and 41. The coil conductor 72 is located closest to the side surface 2b among the coil conductors 72-76. The other end of the conductor portion C3a of the coil conductor 72 is connected to one end of the conductor portion C3a of the coil conductor 73 in the first direction D1. The other end of the conductor portion C3a of the coil conductor 72 is physically connected directly to one end of the conductor portion C3a of the coil conductor 73. The other end of the conductor portion C3a of the coil conductor 72 may be integrated with one end of the conductor portion C3a of the coil conductor 73 to the extent that the boundary therebetween is not visible.

[0045] The coil conductor 73 is located in the same layer as the electrode conductors 32 and 42. The other end of the conductor portion C3a of the coil conductor 73 is connected to one end of the conductor portion C3a of the coil conductor 74 in the first direction D1. The other end of the conductor portion C3a of the coil conductor 73 is physically connected directly to one end of the conductor portion C3a of the coil conductor 74. The other end of the conductor portion C3a of the coil conductor 73 may be integrated with one end of the conductor portion C3a of the coil conductor 74 to such an extent that the boundary between the conductor portion C3a and the conductor portion C3a is not visible. The coil conductor 74 is located in the same layer as the electrode conductors 33 and 43. The other end of the conductor portion C3a of the coil conductor 74 is connected to one end of the conductor portion C3a of the coil conductor 75 in the first direction D1. The other end of the conductor portion C3a of the coil conductor 74 is physically connected directly to one end of the conductor portion C3a of the coil conductor 75. The other end of the conductor portion C3a of the coil conductor 74 may be integrated with one end of the conductor portion C3a of the coil conductor 75 to the extent that the boundary therebetween is not visible.

[0046] The coil conductor 75 is located in the same layer as the electrode conductors 34 and 44. The other end of the conductor portion C3a of the coil conductor 75 is connected to one end of the conductor portion C3a of the coil conductor 76 in the first direction D1. The other end of the conductor portion C3a of the coil conductor 75 is physically connected directly to one end of the conductor portion C3a of the coil conductor 76. The other end of the conductor portion C3a of the coil conductor 75 may be integrated with one end of the conductor portion C3a of the coil conductor 76 to such an extent that the boundary between the conductor portion C3a and the coil conductor 75 is not visible. The coil conductor 76 is located in the same layer as the electrode conductors 35 and 45. The coil conductor 76 is located closest to the side surface 2c among the multiple coil conductors 72 to 76. The other end of the conductor portion C3a of the coil conductor 76 is connected to one end of the conductor portion C3a of the coil conductor 77 in the first direction D1. The other end of the conductor portion C3a of the coil conductor 76 is directly physically connected to one end of the conductor portion C3a of the coil conductor 77. The other end of the conductor portion C3a of the coil conductor 76 may be integrated with the one end of the conductor portion C3a of the coil conductor 77 to the extent that the boundary therebetween is not visible.

[0047] As shown in FIG. 3, the coil conductor 77 is an outermost coil conductor that is located outwardly of the coil 7 in the coil axis direction of the coil 7 among the coil conductors 71 to 77. The coil conductor 77 is located at an end of the coil 7 in the coil axis direction of the coil 7. The coil conductor 77 is located closest to the side surface 2c among the coil conductors 71 to 77. The coil conductor 77 is a third coil conductor that is located between the coil conductor 76 and the side surface 2c. As shown in FIG. 4, the coil conductor 77 is not located in the same layer as the electrode conductors 31 to 35 and the electrode conductors 41 to 45. That is, the electrode conductors 35 and 45 that are the outermost electrode conductors are not located in the same layer as the coil conductor 77 that is the outermost coil conductor. The electrode conductors 35 and 45 are located inside the coil 7 with respect to the coil conductor 77 in the first direction D1.

[0048] The coil conductor 77 has conductor portions C3a and C3b, similar to the coil conductor 71. The conductor portion C3a of the coil conductor 77 is a third conductor portion constituting a part of the annular orbit of the coil 7. The conductor portion C3a of the coil conductor 77 extends so as to surround the coil axis of the coil 7. The conductor portion C3b of the coil conductor 77 is a fourth conductor portion protruding outside the annular orbit of the coil 7, as viewed from the first direction D1. The conductor portion C3b of the coil conductor 77 extends in a direction intersecting the second direction D2 and the third direction D3, as viewed from the first direction D1. The conductor portion C3b of the coil conductor 77 is continuous with the conductor portion C3a of the coil conductor 77. In this embodiment, one end of the conductor portion C3b of the coil conductor 77 is continuous with the other end of the conductor portion C3a of the coil conductor 77. The other end of the conductor portion C3b of the coil conductor 77 is connected in the first direction D1 to the conductor portion C2b of the electrode conductor 45. The other end of the conductor portion C3b of the coil conductor 77 is directly physically connected to the conductor portion C2b of the electrode conductor 45. The other end of the conductor portion C3b of the coil conductor 77 may be integrated with the conductor portion C2b of the electrode conductor 45 to the extent that the boundary therebetween is not visible.

[0049] 3, when the pair of external electrodes 3, 4 and the coil 7 are viewed from the third direction D3, both ends of the coil 7 in the first direction D1 are exposed from each of the pair of external electrodes 3, 4 in the first direction D1. When viewed from the third direction D3, both ends of the coil 7 are exposed from each of the pair of external electrodes 3, 4 means that when viewed from the third direction D3, both ends of the coil 7 do not overlap with each of the pair of external electrodes 3, 4. In this embodiment, the entire pair of coil conductors 71, 77 are exposed from each of the pair of external electrodes 3, 4 when viewed from the third direction D3.

[0050] The length L1 of the external electrode 3 and the length L2 of the external electrode 4 in the first direction D1 are smaller than the length L3 of the coil 7 in the first direction D1. The length L1 is defined, for example, by the maximum width of the external electrode 3 in the first direction D1. The length L2 is defined, for example, by the maximum width of the external electrode 4 in the first direction D1. The length L3 is defined, for example, by the distance in the first direction D1 between an imaginary plane that is parallel to the side surface 2b and in contact with the coil conductor 71, and an imaginary plane that is parallel to the side surface 2c and in contact with the coil conductor 77. In this embodiment, the length L3 is the distance in the first direction D1 between the surface of the coil conductor 71 on the side of the side surface 2b and the surface of the coil conductor 77 on the side of the side surface 2c. As an example, when element body 2 is 0201 size (length in second direction D2 is 0.250 mm, length in first direction D1 is 0.125 mm), lengths L1, L2 are, for example, 70 μm or more and 100 μm or less, and length L3 is, for example, 85 μm or more and 115 μm or less. Lengths L1, L2, L3 may differ depending on the size of element body 2.

[0051] The connection configuration between the coil conductor 71 and the electrode conductor 31 and the connection configuration between the coil conductor 71 and the coil conductor 72 will be described with reference to FIG. 5. FIG. 5 is a view of a layer on which the coil conductor 71 is formed and a layer on which the coil conductor 72 is formed, as viewed from a first direction D1. In FIG. 5, for the sake of explanation, the conductor portion C3b of the coil conductor 71 and the conductor portion C1b of the electrode conductor 31 are intentionally shifted from each other. In reality, the outer edge along the extension direction of the conductor portion C3b of the coil conductor 71 has a portion that overlaps with the outer edge along the extension direction of the conductor portion C1b of the electrode conductor 31. Similarly, in FIG. 5, the conductor portion C3a of the coil conductor 71 and the conductor portion C3a of the coil conductor 72 are intentionally shifted from each other. In reality, the outer edge along the extension direction of the conductor portion C3a of the coil conductor 71 has a portion that overlaps with the outer edge along the extension direction of the conductor portion C3a of the coil conductor 72.

[0052] As shown in FIG. 5, the coil conductor 71 overlaps with the electrode conductor 31 when viewed from the first direction D1, and is electrically connected to the electrode conductor 31. In the present embodiment, an end of a conductor portion C3b of the coil conductor 71 overlaps with a part of the conductor portion C1b of the electrode conductor 31 when viewed from the first direction D1. The conductor portion C3b of the coil conductor 71 and the conductor portion C1b of the electrode conductor 31 are connected in the first direction D1 at the overlapping portion. In an actual laminated coil component 1, the conductor portion C3b of the coil conductor 71 may be integrated with the conductor portion C1b of the electrode conductor 31 to such an extent that the boundary between the conductor portion C3b of the coil conductor 71 and the conductor portion C1b of the electrode conductor 31 is not visible. The conductor portion C3b of the coil conductor 71 is physically and electrically connected to the conductor portion C1b of the electrode conductor 31. The width of the conductor portion C3b of the coil conductor 71 is equal to the width of the conductor portion C1b of the electrode conductor 31. Hereinafter, "equivalent" does not necessarily mean that the values ​​are the same. Even if the values ​​include slight differences, manufacturing errors, or measurement errors within a preset range, the values ​​may be considered to be equivalent.

[0053] The coil conductor 71 overlaps with the coil conductor 72 when viewed from the first direction D1, and is electrically connected to the coil conductor 72. In the present embodiment, the ends of the conductor portion C3a of the coil conductor 71 that are not continuous with the conductor portion C3b overlap with the ends of the conductor portion C3a of the coil conductor 72 when viewed from the first direction D1. In the present embodiment, the conductor portion C3a of the coil conductor 71 and the conductor portion C3a of the coil conductor 72 are connected in the first direction D1 at the overlapping portions. In an actual laminated coil component 1, the conductor portion C3a of the coil conductor 71 may be integrated with the conductor portion C3a of the coil conductor 72 to such an extent that the boundary between the conductor portion C3a of the coil conductor 71 and the conductor portion C3a of the coil conductor 72 is not visible. The conductor portion C3a of the coil conductor 71 is physically and electrically connected to the conductor portion C3a of the coil conductor 72. The width of the conductor portion C3a of the coil conductor 71 is equal to the width of the conductor portion C3a of the coil conductor 72.

[0054] The connection configuration between the coil conductor 77 and the electrode conductor 45 and the connection configuration between the coil conductor 77 and the coil conductor 76 will be described with reference to FIG. 6. FIG. 6 is a view of the layer on which the coil conductor 77 is formed and the layer on which the coil conductor 76 is formed, as viewed from the first direction D1. In FIG. 6, for the sake of explanation, the conductor portion C3b of the coil conductor 77 and the conductor portion C2b of the electrode conductor 45 are intentionally shifted from each other. In reality, the outer edge along the extension direction of the conductor portion C3b of the coil conductor 77 has a portion that overlaps with the outer edge along the extension direction of the conductor portion C2b of the electrode conductor 45. Similarly, in FIG. 6, the conductor portion C3a of the coil conductor 77 and the conductor portion C3a of the coil conductor 76 are intentionally shifted from each other. In reality, the outer edge along the extension direction of the conductor portion C3a of the coil conductor 77 has a portion that overlaps with the outer edge along the extension direction of the conductor portion C3a of the coil conductor 76.

[0055] As shown in FIG. 6, the coil conductor 77 overlaps with the electrode conductor 45 when viewed from the first direction D1, and is electrically connected to the electrode conductor 45. In the present embodiment, an end of a conductor portion C3b of the coil conductor 77 overlaps with a part of the conductor portion C2b of the electrode conductor 45 when viewed from the first direction D1. The conductor portion C3b of the coil conductor 77 and the conductor portion C2b of the electrode conductor 45 are connected in the first direction D1 at the overlapping portion. In an actual laminated coil component 1, the conductor portion C3b of the coil conductor 77 may be integrated with the conductor portion C2b of the electrode conductor 45 to such an extent that the boundary between the conductor portion C3b of the coil conductor 77 and the conductor portion C2b of the electrode conductor 45 is not visible. The conductor portion C3b of the coil conductor 77 is physically and electrically connected to the conductor portion C2b of the electrode conductor 45. The width of the conductor portion C3b of the coil conductor 77 is equal to the width of the conductor portion C2b of the electrode conductor 45.

[0056] The coil conductor 77 overlaps with the coil conductor 76 when viewed from the first direction D1, and is electrically connected to the coil conductor 76. In the present embodiment, the ends of the conductor portion C3a of the coil conductor 77 that are not continuous with the conductor portion C3b overlap with the ends of the conductor portion C3a of the coil conductor 76 when viewed from the first direction D1. In the present embodiment, the conductor portion C3a of the coil conductor 77 and the conductor portion C3a of the coil conductor 76 are connected in the first direction D1 at the overlapping portions. In an actual laminated coil component 1, the conductor portion C3a of the coil conductor 77 may be integrated with the conductor portion C3a of the coil conductor 76 to such an extent that the boundary between the conductor portion C3a of the coil conductor 77 and the conductor portion C3a of the coil conductor 76 is not visible. The conductor portion C3a of the coil conductor 77 is physically and electrically connected to the conductor portion C3a of the coil conductor 76. The width of the conductor portion C3a of the coil conductor 77 is equal to the width of the conductor portion C3a of the coil conductor 76.

[0057] In the laminated coil component 1 according to the present embodiment, the electrode conductors 31-35, 41-45 are located in the same layer as the coil conductors 72-76, but are not located in the same layer as the coil conductors 71 and 77. Therefore, the volume of the external electrodes 3, 4 relative to the element body 2 in the first direction D1 is smaller than that in a configuration in which the electrode conductors are located in the same layer as the coil conductors 71 and 77. For example, in a configuration in which the number of layers of the coil conductors is equal to the number of layers of the electrode conductors, if the number of layers of the coil conductors and the electrode conductors is reduced to reduce the volume of the external electrodes, the inductance value of the coil 7 decreases. However, according to the configuration of the laminated coil component 1 according to the present embodiment, the volume of the external electrodes 3, 4 is reduced while the number of layers of the coil conductor, i.e., the inductance value of the coil 7, is maintained. Therefore, in the laminated coil component 1 according to the present embodiment, the external electrodes 3, 4 are less likely to peel off from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3, 4. As a result, deterioration of the characteristics of the laminated coil component 1 is suppressed. The laminated coil component 1 according to this embodiment also suppresses distortion of the laminated coil component 1 caused by the difference in the thermal expansion coefficient or the thermal contraction coefficient between the element body 2 and the external electrodes 3, 4. This improves the mountability of the laminated coil component 1 in electronic devices.

[0058] The electrode conductor 31 and the electrode conductor 45 each have conductor portions C1a, C2a arranged so as to be exposed at least on the main surface 2a, and conductor portions C1b, C2b that are continuous with the conductor portions C1a, C2a and protrude into the element body 2 when viewed from the first direction D1. The coil conductor 71 overlaps with the conductor portion C1b of the electrode conductor 31 when viewed from the first direction D1, and is electrically connected to the conductor portion C1b of the electrode conductor 31. The coil conductor 77 overlaps with the conductor portion C2b of the electrode conductor 45 when viewed from the first direction D1, and is electrically connected to the conductor portion C2b of the electrode conductor 45. When the electrode conductor 31 and the electrode conductor 45 each have conductor portions C1b, C2b protruding into the body 2 when viewed from the first direction D1, and the coil conductor 71 and the coil conductor 77 each overlap with the conductor portions C1b, C2b when viewed from the first direction D1, the connection between the coil 7 and the external electrodes 3, 4 is made more reliable.

[0059] Each of the coil conductor 71 and the coil conductor 77 has a conductor portion C3a that forms a part of the annular orbit in the coil 7, and a conductor portion C3b that is continuous with the conductor portion C3a and protrudes outside the annular orbit as viewed from the first direction D1. The conductor portion C3b of the coil conductor 71 overlaps with the conductor portion C1b of the electrode conductor 31 as viewed from the first direction D1, and is electrically connected to the conductor portion C1b of the electrode conductor 31. The conductor portion C3b of the coil conductor 77 overlaps with the conductor portion C2b of the electrode conductor 45 as viewed from the first direction D1, and is electrically connected to the conductor portion C2b of the electrode conductor 45. When each of the coil conductors 71 and 77 has a conductor portion C3b that protrudes outside the annular orbit of the coil 7 when viewed from the first direction D1, and the conductor portion C3b of each of the coil conductors 71 and 77 overlaps with the conductor portions C1b, C2b of the electrode conductors 31 and 45, respectively, when viewed from the first direction D1, the connection between the coil 7 and the external electrodes 3, 4 is made more reliable.

[0060] The conductor portion C1b of the electrode conductor 31 and the conductor portion C3b of the coil conductor 71 are connected in the first direction D1. The conductor portion C2b of the electrode conductor 45 and the conductor portion C3b of the coil conductor 77 are connected in the first direction D1. When the conductor portion C1b of the electrode conductor 31 and the conductor portion C3b of the coil conductor 71 are connected in the first direction D1, and the conductor portion C2b of the electrode conductor 45 and the conductor portion C3b of the coil conductor 77 are connected in the first direction D1, the conductor portions C1b, C2b and the conductor portion C3b located in different layers are appropriately connected, and the electrical connection between the coil 7 and the external electrodes 3, 4 is more reliably maintained. As a result, deterioration of the characteristics of the laminated coil component 1 is suppressed.

[0061] In the laminated coil component 1 according to the present embodiment, the length of the external electrodes 3, 4 in the first direction D1 is smaller than the length of the coil 7 in the first direction D1. Therefore, in the present embodiment, the volume of the external electrodes 3, 4 relative to the element body 2 in the first direction D1 is smaller than that in a configuration in which the length of the external electrodes 3, 4 in the first direction D1 is equal to or greater than the length of the coil 7 in the first direction D1. Therefore, in the present embodiment, peeling of the external electrodes 3, 4 from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3, 4 is less likely to occur. As a result, deterioration of the characteristics of the laminated coil component 1 is suppressed.

[0062] In the laminated coil component 1 according to the present embodiment, when the external electrodes 3, 4 and the coil 7 are viewed from the third direction D3, both ends of the coil 7 in the first direction D1 are exposed from the external electrodes 3, 4 in the first direction D1. That is, the length of the external electrodes 3, 4 in the first direction D1 is smaller than the length of the coil 7 in the first direction D1. Therefore, in the present embodiment, the volume of the external electrodes 3, 4 relative to the element body 2 in the first direction D1 is smaller than that in a configuration in which both ends of the coil 7 in the first direction D1 are not exposed from the external electrodes 3, 4 in the first direction D1. Therefore, in the present embodiment, the external electrodes 3, 4 are less likely to peel off from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3, 4. As a result, deterioration of the characteristics of the laminated coil component 1 is suppressed.

[0063] The external electrodes 3, 4 are disposed on the element body 2 so as to be exposed only from the corresponding one of the pair of end faces 2d, 2e and the main surface 2a. When the external electrodes 3, 4 are arranged on the base body 2 so as to be exposed only to the corresponding one of a pair of end faces 2d, 2e and the main surface 2a, a contact area with an electronic device when the laminated coil component 1 is mounted on the electronic device is sufficiently secured within the exposed surfaces of the external electrodes 3, 4.

[0064] In the laminated coil component 1 according to the present embodiment, the coil 7 has a plurality of coil conductors 71-77 arranged in the coil axis direction, and the external electrodes 3, 4 have a plurality of electrode conductors 31-35, 41-45 arranged in the coil axis direction. The electrode conductors 31, 35, 41, 45 are not located in the same layer as the coil conductors 71, 77. Therefore, the volume of the external electrodes 3, 4 relative to the element body 2 in the first direction D1 is smaller than that in a configuration in which the electrode conductors 31, 35, 41, 45 are located in the same layer as the coil conductors 71, 77. Therefore, in the present embodiment, the external electrodes 3, 4 are less likely to peel off from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3, 4. As a result, the deterioration of the characteristics of the laminated coil component 1 is suppressed.

[0065] (Modification) Next, the configuration of a laminated coil component 1A according to a modified example of the present embodiment will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a plan view showing the laminated coil component 1A according to the modified example. Fig. 8 is an exploded view showing the configuration of the laminated coil component 1A according to the modified example. This modified example differs from the above-described first embodiment in terms of the configurations of the electrode conductors and the coil conductors. Below, the differences between the above-described first embodiment and this modified example will be mainly described.

[0066] The laminated coil component 1A includes an element body 2, a pair of external electrodes 3A and 4A, and a coil 7A. The external electrode 3A has a plurality of electrode conductors 131, 132, 133, 134, 135, and 136 shown in FIG. 8. The external electrode 3A is configured by stacking the plurality of electrode conductors 131 to 136 in a first direction D1. In this modification, the number of the plurality of electrode conductors 131 to 136 is "6". The electrode conductors 131, 132, 133, 134, 135, and 136 are stacked in this order in a direction from the side surface 2b toward the side surface 2c. The plurality of electrode conductors 131 to 136 are aligned in the first direction D1 and connected to each other. The plurality of electrode conductors 131 to 136 are physically connected directly to each other. The electrode conductors 131 to 136 may be integrated to the extent that the boundaries between the electrode conductors 131 to 136 are not visible.

[0067] The electrode conductor 131 is an outermost electrode conductor located outermost in the first direction D1 among the electrode conductors 131-136. More specifically, the electrode conductor 131 is a first outermost electrode conductor located closest to the side surface 2b among the electrode conductors 131-136. The electrode conductor 131 has conductor portions C11a and C11b. The conductor portion C11a is a first conductor portion arranged so as to be exposed at least on the main surface 2a. As in the first embodiment, in this modification, the conductor portion C11a is exposed on the main surface 2a and the end surface 2d. The conductor portion C11a has a substantially L-shape when viewed from the first direction D1. The conductor portion C11b is a second conductor portion protruding into the element body 2 when viewed from the first direction D1. The conductor portion C11b extends in a direction intersecting the second direction D2 and the third direction D13 when viewed from the first direction D1. One of the two ends of the conductor portion C11b is continuous with the conductor portion C11a of the electrode conductor 131. In the above embodiment, as shown in Fig. 4, the end of the conductor portion C1b that is not continuous with the conductor portion C1a is not continuous with the coil conductor 72 located in the same layer as the electrode conductor 31. In this modification, as shown in Fig. 8, the end of the conductor portion C11b that is not continuous with the conductor portion C11a is continuous with the coil conductor 172 located in the same layer as the electrode conductor 131.

[0068] The electrode conductors 132 to 134 are electrode conductors located between the electrode conductors 131 and 136 in the first direction D1. The electrode conductor 136 is an outermost electrode conductor located at the outermost position in the first direction D1 among the electrode conductors 131 to 136. More specifically, the electrode conductor 136 is a second outermost electrode conductor located closest to the side surface 2c among the electrode conductors 131 to 136. Each of the electrode conductors 132 to 136 has a conductor portion C11a arranged so as to be exposed at least to the main surface 2a, similar to the electrode conductor 131. The shape and position of the conductor portion C11a of each of the electrode conductors 132 to 136 are the same as the shape and position of the conductor portion C11a of the electrode conductor 131. Therefore, the conductor portions C11a of the electrode conductors 131 to 136 overlap each other when viewed from the first direction D1. Unlike the electrode conductor 131, each of the electrode conductors 132 to 136 does not have the conductor portion C11b.

[0069] The external electrode 4A has a plurality of electrode conductors 141, 142, 143, 144, 145, and 146 shown in FIG. 8. The external electrode 4A is configured by stacking a plurality of electrode conductors 141 to 146 in a first direction D1. In this modification, the number of the plurality of electrode conductors 141 to 146 is "6". The electrode conductors 141, 142, 143, 144, 145, and 146 are stacked in this order in a direction from the side surface 2b toward the side surface 2c. The plurality of electrode conductors 141 to 146 are arranged side by side in the first direction D1 and are connected to each other. The plurality of electrode conductors 141 to 146 are physically connected directly to each other. The electrode conductors 141 to 146 may be integrated to such an extent that the boundaries between the electrode conductors 141 to 146 are not visible.

[0070] The electrode conductor 141 is an outermost electrode conductor located outermost in the first direction D1 among the multiple electrode conductors 141-146. More specifically, the electrode conductor 141 is a first outermost electrode conductor located closest to the side surface 2b among the multiple electrode conductors 141-146. The electrode conductor 141 has a conductor portion C12a. The conductor portion C12a is a first conductor portion arranged so as to be exposed at least on the main surface 2a. In this modification, the conductor portion C12a is exposed on the main surface 2a and the end surface 2e. The conductor portion C12a is substantially L-shaped when viewed from the first direction D1.

[0071] The electrode conductors 142 to 145 are electrode conductors located between the electrode conductor 141 and the electrode conductor 146 in the first direction D1. Like the electrode conductor 141, each of the electrode conductors 142 to 145 has a conductor portion C12a arranged so as to be exposed at least on the main surface 2a. The shape and position of the conductor portion C12a of each of the electrode conductors 142 to 144 are the same as the shape and position of the conductor portion C12a of the electrode conductor 141.

[0072] The electrode conductor 146 is an outermost electrode conductor located outermost in the first direction D1 among the electrode conductors 141 to 146. More specifically, the electrode conductor 146 is a second outermost electrode conductor located closest to the side surface 2c among the electrode conductors 141 to 146. The electrode conductor 146 has a conductor portion C12a and a conductor portion C12b. In this modification, the shape and position of the conductor portion C12a of each electrode conductor 146 are the same as the shape and position of the conductor portion C12a of the electrode conductor 141. Therefore, the conductor portions C12a of the electrode conductors 141 to 146 overlap each other when viewed from the first direction D1. The conductor portion C12b is a second conductor portion protruding into the element body 2 when viewed from the first direction D1. The conductor portion C12b extends in a direction intersecting the second direction D2 and the third direction D3 when viewed from the first direction D1. One of the two ends of the conductor portion C12b is continuous with the conductor portion C12a of the electrode conductor 146. In the above embodiment, as shown in Fig. 4, the end of the conductor portion C2b that is not continuous with the conductor portion C2a is not continuous with the coil conductor 76 located in the same layer as the electrode conductor 45. In this modification, as shown in Fig. 8, the end of the conductor portion C12b that is not continuous with the conductor portion C12a is continuous with the coil conductor 177 located in the same layer as the electrode conductor 146.

[0073] As shown in FIG. 7, the coil 7A is disposed in the element body 2 such that the coil axis direction of the coil 7A is aligned with the first direction D1. The coil 7A has a plurality of coil conductors 171, 172, 173, 174, 175, 176, and 178. The coil 7A is configured by stacking the plurality of coil conductors 171 to 178 in the first direction D1. In this embodiment, the number of the plurality of coil conductors 171 to 178 is "8". The number of the plurality of coil conductors in the coil 7A is greater than the number of the plurality of electrode conductors in each of the pair of external electrodes 3A and 4A. The coil conductor 171, the coil conductor 172, the coil conductor 173, the coil conductor 174, the coil conductor 175, the coil conductor 176, and the coil conductor 178 are stacked in this order in the direction from the side surface 2b toward the side surface 2c. The plurality of coil conductors 171 to 178 are arranged in the first direction D1, i.e., in the coil axis direction of the coil 7A. The multiple coil conductors 171 to 178 are connected to each other. The multiple coil conductors 171 to 178 are directly and physically connected to each other. The coil conductors 171 to 178 may be integrated to the extent that the boundaries between the coil conductors 171 to 178 are not visible.

[0074] As shown in FIG. 7, the coil conductor 171 is an outermost coil conductor that is located outwardly in the coil axis direction of the coil 7A among the multiple coil conductors 171-178. The coil conductor 171 is located at an end of the coil 7A in the coil axis direction of the coil 7A. The coil conductor 171 is located closest to the side surface 2b among the multiple coil conductors 171-178. The coil conductor 171 is a second coil conductor that is located between the coil conductor 172 and the side surface 2b. As shown in FIG. 8, the coil conductor 171 is not located in the same layer as any of the multiple electrode conductors 131-136 and the multiple electrode conductors 141-146. In other words, the electrode conductors 131 and 141 that are the outermost electrode conductors are not located in the same layer as the coil conductor 171 that is the outermost coil conductor.

[0075] The coil conductor 171 has conductor portions C13a and C13b. The conductor portion C13a of the coil conductor 171 is a third conductor portion that constitutes a part of the annular orbit of the coil 7A. The conductor portion C13a of the coil conductor 171 extends so as to surround the coil axis of the coil 7A. The conductor portion C13b of the coil conductor 171 is a fourth conductor portion that protrudes outside the annular orbit of the coil 7A when viewed from the first direction D1. The conductor portion C13b of the coil conductor 171 is continuous with the conductor portion C13a of the coil conductor 171. The conductor portion C13b of the coil conductor 171 is connected to the conductor portion C11b of the electrode conductor 131 in the first direction D1. The conductor portion C13b of the coil conductor 171 is physically connected directly to the conductor portion C11b of the electrode conductor 131. The conductor portion C13b of the coil conductor 171 may be integrated with the conductor portion C11b of the electrode conductor 131 to the extent that the boundary therebetween is not visible.

[0076] The coil conductors 172-176 are first coil conductors located in the same layer as the electrode conductors 131-136 and the electrode conductors 141-146. The coil conductor 172 is located in the same layer as the electrode conductors 131 and 141. The coil conductor 172 has a conductor portion C13a and a conductor portion C13b, similar to the coil conductor 171. The shape and position of the conductor portions C13a and C13b of the coil conductor 172 are the same as those of the conductor portions C13a and C13b of the coil conductor 171. Therefore, in this modification, the entire coil conductor 172 overlaps with the coil conductor 171 when viewed from the first direction D1. The entire coil conductor 172 is connected to the coil conductor 171 in the first direction D1. The entire coil conductor 172 is directly physically connected to the coil conductor 171. The entire coil conductor 172 may be integrated with the coil conductor 171 to such an extent that the boundary between the coil conductor 172 and the coil conductor 171 is not visible. Of both ends of the conductor portion C13b of the coil conductor 172, the end that is not continuous with the conductor portion C13a is continuous with the conductor portion C11b of the electrode conductor 131 located in the same layer. The continuous portion between the coil conductor 172 and the electrode conductor 131 overlaps the coil conductor 171 in the first direction D1.

[0077] The coil conductor 173 is located in the same layer as the electrode conductors 132 and 142. The coil conductor 173 has a conductor portion C13a extending to surround the coil axis of the coil 7A. One end of the conductor portion C13a of the coil conductor 173 is connected to one end of the conductor portion C13a of the coil conductor 172 in the first direction D1. One end of the conductor portion C13a of the coil conductor 173 is physically connected directly to one end of the conductor portion C13a of the coil conductor 172. One end of the conductor portion C13a of the coil conductor 173 may be integrated with one end of the conductor portion C13a of the coil conductor 172 to the extent that the boundary between them is not visible.

[0078] The coil conductor 174 is located in the same layer as the electrode conductors 133 and 143. The coil conductor 174 has a conductor portion C13a extending to surround the coil axis of the coil 7A. The shape and position of the conductor portions C13a and C13b of the coil conductor 174 are the same as those of the conductor portions C13a and C13b of the coil conductor 173. Therefore, in this modification, the entire coil conductor 174 overlaps with the coil conductor 173 when viewed from the first direction D1. The entire coil conductor 174 is connected to the coil conductor 173 in the first direction D1. The entire coil conductor 174 is directly physically connected to the coil conductor 173. The entire coil conductor 174 may be integrated with the coil conductor 173 to such an extent that the boundary between the coil conductor 174 and the coil conductor 173 is not visible.

[0079] The coil conductor 175 is located in the same layer as the electrode conductors 134, 144. The coil conductor 175 has a conductor portion C13a extending to surround the coil axis of the coil 7A. One end of the conductor portion C13a of the coil conductor 175 is connected to one end of the conductor portion C13a of the coil conductor 174 in the first direction D1. One end of the conductor portion C13a of the coil conductor 175 is physically connected directly to one end of the conductor portion C13a of the coil conductor 174. One end of the conductor portion C13a of the coil conductor 175 may be integrated with one end of the conductor portion C13a of the coil conductor 174 to the extent that the boundary between them is not visible.

[0080] The coil conductor 176 is located in the same layer as the electrode conductors 135 and 145. The coil conductor 176 has a conductor portion C13a extending to surround the coil axis of the coil 7A. The shape and position of the conductor portions C13a and C13b of the coil conductor 176 are the same as those of the conductor portions C13a and C13b of the coil conductor 175. Therefore, in this modification, the entire coil conductor 176 overlaps with the coil conductor 175 when viewed from the first direction D1. The entire coil conductor 176 is connected to the coil conductor 175 in the first direction D1. The entire coil conductor 176 is directly physically connected to the coil conductor 175. The entire coil conductor 176 may be integrated with the coil conductor 175 to such an extent that the boundary between the coil conductor 176 and the coil conductor 175 is not visible.

[0081] The coil conductor 177 is located in the same layer as the electrode conductors 136 and 146. The coil conductor 177 has a conductor portion C13a and a conductor portion C13b, similar to the coil conductor 172. The conductor portion C13a of the coil conductor 177 constitutes a part of the annular orbit of the coil 7A. The conductor portion C13b protrudes outside the annular orbit of the coil 7A when viewed from the first direction D1. The shape and position of the conductor portions C13a and C13b of the coil conductor 177 are the same as the shape and position of the conductor portions C13a and C13b of the coil conductor 178. Therefore, the entire coil conductor 177 overlaps with the coil conductor 178 when viewed from the first direction D1. The entire coil conductor 177 is connected to the coil conductor 178 in the first direction D1. The entire coil conductor 177 is directly and physically connected to the coil conductor 178. The entire coil conductor 177 may be integrated with the coil conductor 178 to the extent that the boundary between them is not visible. Of both ends of the conductor portion C13b of the coil conductor 177, the end that is not continuous with the conductor portion C13a is continuous with the conductor portion C12b of the electrode conductor 146 located in the same layer. The continuous portion between the coil conductor 177 and the electrode conductor 146 overlaps with the coil conductor 178 in the first direction D1.

[0082] As shown in FIG. 7, the coil conductor 178 is an outermost coil conductor located outwardly in the coil axis direction of the coil 7A among the coil conductors 171-178. The coil conductor 178 is located at an end of the coil 7 in the coil axis direction of the coil 7A. The coil conductor 178 is located closest to the side surface 2c among the coil conductors 171-178. The coil conductor 178 is a third coil conductor located between the coil conductor 177 and the side surface 2c. As shown in FIG. 8, the coil conductor 178 is not located in the same layer as the electrode conductors 131-136 and the electrode conductors 141-146. That is, the electrode conductors 136 and 146, which are the outermost electrode conductors, are not located in the same layer as the coil conductor 178, which is the outermost coil conductor. The coil conductor 178 has a conductor portion C13a and a conductor portion C13b, like the coil conductor 177.

[0083] In this modification, similarly to the above-described first embodiment, the multiple electrode conductors 131-136, 141-146 are located in the same layer as the multiple coil conductors 172-177, but not in the same layer as the coil conductors 171, 178. Therefore, the volume of the external electrodes 3A, 4A relative to the element body 2 in the first direction D1 is smaller than in a configuration in which the multiple electrode conductors are also located in the same layer as the coil conductors 171, 178. Therefore, even in the modification, the external electrodes 3A, 4A are less likely to peel off from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3A, 4A. As a result, deterioration of the characteristics of the laminated coil component 1A is suppressed.

[0084] In this modification, the coil conductor 172, which is located in the same layer as the electrode conductor 131, overlaps with the coil conductor 171 when viewed from the first direction D1, and is continuous with the electrode conductor 131. The coil conductor 177, which is located in the same layer as the electrode conductor 146, overlaps with the coil conductor 178 when viewed from the first direction D1, and is continuous with the electrode conductor 146. When the coil conductor 172 located in the same layer as the electrode conductor 131 is continuous with the electrode conductor 131, a continuous portion between the coil conductor 172 located in the same layer as the electrode conductor 131 and the electrode conductor 131 may overlap with the coil conductor 171 in the first direction D1. Similarly, when the coil conductor 177 located in the same layer as the electrode conductor 146 is continuous with the electrode conductor 146, a continuous portion between the coil conductor 177 located in the same layer as the electrode conductor 146 and the electrode conductor 146 may overlap with the coil conductor 178 in the first direction D1. When an overlapping portion is formed, the direct current resistance of the coil 7A decreases, improving the characteristics of the laminated coil component 1A.

[0085] Second Embodiment Next, the configuration of a laminated coil component 1B according to a modified example of this embodiment will be described with reference to Fig. 9 to Fig. 11. Fig. 9 is a perspective view showing the laminated coil component 1B according to a second embodiment. Fig. 10 is a plan view showing the laminated coil component 1B according to the second embodiment. Fig. 11 is an exploded view showing the configuration of the laminated coil component 1B according to the second embodiment. The second embodiment differs from the above-described first embodiment in terms of the configurations of the electrode conductors and the coil conductors. Below, the differences between the above-described first and second embodiments will be mainly described.

[0086] The laminated coil component 1B includes an element body 2, a pair of external electrodes 3B, 4B, and a coil 7B. Unlike the external electrode 3, the external electrode 3B is disposed on the element body 2 so as to be exposed only on the main surface 2a. Unlike the external electrode 4, the external electrode 4B is disposed on the element body 2 so as to be exposed only on the main surface 2a. Each of the external electrodes 3B, 4B extends along a first direction D1 and a second direction D2. Each of the external electrodes 3B, 4B has a rectangular shape when viewed from a third direction D3. Each of the external electrodes 3B, 4B has a thickness in the third direction D3.

[0087] The external electrode 3B has a plurality of electrode conductors 231, 232, 233, 234, and 235 shown in FIG. 11. The external electrode 3B is configured by stacking a plurality of electrode conductors 231 to 235 in a first direction D1. The electrode conductors 231, 232, 233, 234, and 235 are stacked in this order in a direction from the side surface 2b to the side surface 2c. The plurality of electrode conductors 231 to 235 are arranged side by side in the first direction D1 and connected to each other. The plurality of electrode conductors 231 to 235 are physically connected directly to each other. The electrode conductors 231 to 235 may be integrated to such an extent that the boundaries between the electrode conductors 231 to 235 are not visible.

[0088] The electrode conductor 231 is an outermost electrode conductor located outermost in the first direction D1 among the multiple electrode conductors 231-235. More specifically, the electrode conductor 231 is a first outermost electrode conductor located closest to the side surface 2b among the multiple electrode conductors 231-235. The electrode conductor 231 has conductor portions C21a and C21b. The conductor portion C21a is a first conductor portion arranged so as to be exposed at least on the main surface 2a. In this embodiment, the conductor portion C21a is exposed only on the main surface 2a. The conductor portion C21b is a second conductor portion protruding into the element body 2 when viewed from the first direction D1. Unlike the conductor portion C1b, the conductor portion C21b extends along the third direction D3 when viewed from the first direction D1. The conductor portion C21b is continuous with the conductor portion C21a of the electrode conductor 231.

[0089] The electrode conductors 232 to 234 are electrode conductors located between the electrode conductors 231 and 235 in the first direction D1. The electrode conductor 235 is an outermost electrode conductor located at the outermost position in the first direction D1 among the electrode conductors 231 to 235. More specifically, the electrode conductor 235 is a second outermost electrode conductor located closest to the side surface 2c among the electrode conductors 231 to 235. Each of the electrode conductors 232 to 235 has a conductor portion C21a, similar to the electrode conductor 231. In this embodiment, the shape and position of the conductor portion C21a of each of the electrode conductors 232 to 235 are the same as the shape and position of the conductor portion C21a of the electrode conductor 231. Unlike the electrode conductor 231, each of the electrode conductors 232 to 235 does not have a conductor portion C21b.

[0090] The external electrode 4B has a plurality of electrode conductors 241, 242, 243, 244, and 245 shown in FIG. 11. The external electrode 4B is configured by stacking a plurality of electrode conductors 241 to 245 in a first direction D1. The electrode conductors 241, 242, 243, 244, and 245 are stacked in this order in a direction from the side surface 2b toward the side surface 2c. The plurality of electrode conductors 241 to 245 are arranged side by side in the first direction D1 and connected to each other. The plurality of electrode conductors 241 to 245 are physically connected directly to each other. The electrode conductors 241 to 245 may be integrated to such an extent that the boundaries between the electrode conductors 241 to 245 are not visible.

[0091] The electrode conductor 241 is an outermost electrode conductor located outermost in the first direction D1 among the multiple electrode conductors 241-245. More specifically, the electrode conductor 241 is a first outermost electrode conductor located closest to the side surface 2b among the multiple electrode conductors 241-245. The electrode conductor 241 has a conductor portion C22a. The conductor portion C22a is a first conductor portion disposed so as to be exposed at least to the main surface 2a. In this embodiment, the conductor portion C22a is exposed only to the main surface 2a.

[0092] The electrode conductors 242 to 244 are electrode conductors located between the electrode conductor 241 and the electrode conductor 245 in the first direction D1. Each of the electrode conductors 242 to 244 has a conductor portion C22a, similar to the electrode conductor 241. In this embodiment, the shape and position of the conductor portion C22a of each of the electrode conductors 242 to 244 are the same as the shape and position of the conductor portion C22a of the electrode conductor 241.

[0093] The electrode conductor 245 is an outermost electrode conductor located outermost in the first direction D1 among the electrode conductors 241 to 245. More specifically, the electrode conductor 245 is a second outermost electrode conductor located closest to the side surface 2c among the electrode conductors 241 to 245. The electrode conductor 245 has a conductor portion C22a and a conductor portion C22b. In this embodiment, the shape and position of the conductor portion C22a of the electrode conductor 245 are the same as the shape and position of the conductor portion C22a of the electrode conductor 241. The conductor portion C22b is a second conductor portion protruding into the element body 2 when viewed from the first direction D1. Unlike the conductor portion C2b, the conductor portion C22b extends along the third direction D3 when viewed from the first direction D1. The conductor portion C22b is continuous with the conductor portion C22a of the electrode conductor 245.

[0094] As shown in FIG. 10, the coil 7B is disposed in the element body 2 such that the coil axis direction of the coil 7B is along the first direction D1. The coil 7B has a plurality of coil conductors 271, 272, 273, 274, 275, 276, and 277. The coil 7B is configured by stacking a plurality of coil conductors 271 to 277 in the first direction D1. The coil conductor 271, the coil conductor 272, the coil conductor 273, the coil conductor 274, the coil conductor 275, the coil conductor 276, and the coil conductor 277 are stacked in this order in a direction from the side surface 2b toward the side surface 2c. The plurality of coil conductors 271 to 277 are arranged in the first direction D1, i.e., in the coil axis direction of the coil 7B. The plurality of coil conductors 271 to 277 are connected to each other. The plurality of coil conductors 271 to 277 are physically connected directly to each other. The coil conductors 271 to 277 may be integrated to the extent that the boundaries between the coil conductors 271 to 277 are not visible.

[0095] As shown in Fig. 10, the coil conductor 271 is the outermost coil conductor located outermost in the coil axis direction of the coil 7B among the multiple coil conductors 271-277. The coil conductor 271 is located closest to the side surface 2b among the multiple coil conductors 271-277. The coil conductor 271 is a second coil conductor located between the coil conductor 272 and the side surface 2b. As shown in Fig. 11, the coil conductor 271 is not located in the same layer as any of the multiple electrode conductors 231-235 and the multiple electrode conductors 241-245.

[0096] The coil conductor 271 has conductor portions C23a and C23b. The conductor portion C23a of the coil conductor 271 is a third conductor portion that constitutes a part of the annular orbit of the coil 7B. The conductor portion C23a of the coil conductor 271 extends so as to surround the coil axis of the coil 7B. One end of the conductor portion C23a of the coil conductor 271 is connected to one end of the conductor portion C23a of the coil conductor 272 in the first direction D1. One end of the conductor portion C23a of the coil conductor 271 is physically connected directly to one end of the conductor portion C23a of the coil conductor 272. One end of the conductor portion C23a of the coil conductor 271 may be integrated with one end of the conductor portion C23a of the coil conductor 272 to such an extent that the boundary between the conductor portion C23a and the conductor portion C23a is not visible. The conductor portion C23b of the coil conductor 271 is a fourth conductor portion protruding outside the annular orbit of the coil 7B when viewed from the first direction D1. The conductor portion C23b of the coil conductor 271 extends along the third direction D3 when viewed from the first direction D1, unlike the conductor portion C3b of the coil conductor 71 according to the first embodiment. The conductor portion C23b of the coil conductor 271 is continuous with the conductor portion C23a of the coil conductor 271. In this embodiment, one end of the conductor portion C23b of the coil conductor 271 is continuous with the other end of the conductor portion C23a of the coil conductor 271. The other end of the conductor portion C23b of the coil conductor 271 is connected to the conductor portion C21b of the electrode conductor 231 in the first direction D1. The other end of the conductor portion C23b of the coil conductor 271 is physically connected directly to the conductor portion C21b of the electrode conductor 231. The other end of the conductor portion C23b of the coil conductor 271 may be integrated with the conductor portion C21b of the electrode conductor 231 to the extent that the boundary therebetween is not visible.

[0097] The coil conductors 272-276 are first coil conductors located in the same layer as the electrode conductors 231-235 and the electrode conductors 241-245. Each of the coil conductors 272-276 has a conductor portion C23a that forms a part of the circular track of the coil 7B, like the coil conductor 271. The coil conductor 272 is located in the same layer as the electrode conductors 231 and 241. The other end of the conductor portion C23a of the coil conductor 272 is connected to one end of the conductor portion C23a of the coil conductor 273 in the first direction D1. The other end of the conductor portion C23a of the coil conductor 272 is physically connected directly to one end of the conductor portion C23a of the coil conductor 273. The other end of the conductor portion C23a of the coil conductor 272 may be integrated with one end of the conductor portion C23a of the coil conductor 273 to such an extent that the boundary between the conductor portion C23a of the coil conductor 272 and the conductor portion C23a of the coil conductor 273 is not visible.

[0098] The coil conductor 273 is located in the same layer as the electrode conductors 232 and 242. The other end of the conductor portion C23a of the coil conductor 273 is connected to one end of the conductor portion C23a of the coil conductor 274 in the first direction D1. The other end of the conductor portion C23a of the coil conductor 273 is physically connected directly to one end of the conductor portion C23a of the coil conductor 274. The other end of the conductor portion C23a of the coil conductor 273 may be integrated with one end of the conductor portion C23a of the coil conductor 274 to such an extent that the boundary between them is not visible. The coil conductor 274 is located in the same layer as the electrode conductors 233 and 243. The other end of the conductor portion C23a of the coil conductor 274 is connected to one end of the conductor portion C23a of the coil conductor 275 in the first direction D1. The other end of the conductor portion C23a of the coil conductor 274 is directly physically connected to one end of the conductor portion C23a of the coil conductor 275. The other end of the conductor portion C23a of the coil conductor 274 may be integrated with one end of the conductor portion C23a of the coil conductor 275 to the extent that the boundary therebetween is not visible.

[0099] The coil conductor 275 is located in the same layer as the electrode conductors 234 and 244. The other end of the conductor portion C23a of the coil conductor 275 is connected to one end of the conductor portion C23a of the coil conductor 276 in the first direction D1. The other end of the conductor portion C23a of the coil conductor 275 is directly and physically connected to one end of the conductor portion C23a of the coil conductor 276. The other end of the conductor portion C23a of the coil conductor 275 may be integrated with one end of the conductor portion C23a of the coil conductor 276 to such an extent that the boundary between them is not visible. The coil conductor 276 is located in the same layer as the electrode conductors 235 and 245. The other end of the conductor portion C23a of the coil conductor 276 is connected to one end of the conductor portion C23a of the coil conductor 277 in the first direction D1. The other end of the conductor portion C23a of the coil conductor 276 is directly physically connected to one end of the conductor portion C23a of the coil conductor 277. The other end of the conductor portion C23a of the coil conductor 276 may be integrated with the one end of the conductor portion C23a of the coil conductor 277 to the extent that the boundary therebetween is not visible.

[0100] As shown in Fig. 10, the coil conductor 277 is the outermost coil conductor located outermost in the coil axis direction of the coil 7B among the multiple coil conductors 271-277. The coil conductor 277 is located closest to the side surface 2c among the multiple coil conductors 271-277. The coil conductor 277 is a third coil conductor located between the coil conductor 276 and the side surface 2c. As shown in Fig. 11, the coil conductor 277 is not located in the same layer as any of the multiple electrode conductors 231-235 and the multiple electrode conductors 241-245.

[0101] The coil conductor 277 has conductor portions C23a and C23b, similar to the coil conductor 271. The conductor portion C23a of the coil conductor 277 is a third conductor portion constituting a part of the annular track of the coil 7B. The conductor portion C23b of the coil conductor 277 extends along the third direction D3 as viewed from the first direction D1, unlike the conductor portion C3b of the coil conductor 77 according to the first embodiment. The conductor portion C23b of the coil conductor 277 is continuous with the conductor portion C23a of the coil conductor 277. In this embodiment, one end of the conductor portion C23b of the coil conductor 277 is continuous with the other end of the conductor portion C23a of the coil conductor 277. The other end of the conductor portion C23b of the coil conductor 277 is connected to the conductor portion C22b of the electrode conductor 245 in the first direction D1. The other end of the conductor portion C23b of the coil conductor 277 is directly physically connected to the conductor portion C22b of the electrode conductor 245. The other end of the conductor portion C23b of the coil conductor 277 may be integrated with the conductor portion C22b of the electrode conductor 245 to the extent that the boundary therebetween is not visible.

[0102] In the second embodiment, similarly to the above-described first embodiment, the multiple electrode conductors 231-235, 241-245 are located in the same layer as the multiple coil conductors 272-276, but not in the same layer as the coil conductors 271, 277. Therefore, the volume of the external electrodes 3B, 4B relative to the element body 2 in the first direction D1 is smaller than in a configuration in which the multiple electrode conductors are also located in the same layer as the coil conductors 271, 277. Therefore, also in the second embodiment, peeling of the external electrodes 3B, 4B from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3B, 4B is unlikely to occur. As a result, deterioration of the characteristics of the laminated coil component 1B is suppressed.

[0103] In the second embodiment, the external electrodes 3B, 4B are arranged on the element body 2 so as to be exposed only on the main surface 2a. When the external electrodes 3B, 4B are arranged on the element body 2 so as to be exposed only on the main surface 2a, the volume of the external electrodes 3B, 4B relative to the element body 2 is reduced. Therefore, the external electrodes 3B, 4B are less likely to peel off from the element body 2 due to the difference in the thermal expansion coefficient or thermal contraction coefficient between the element body 2 and the external electrodes 3B, 4B. As a result, deterioration of the characteristics of the laminated coil component 1B is further suppressed.

[0104] Although the embodiment of the present invention has been described above, the present invention is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.

[0105] For example, the width of the conductor portion C1b of the electrode conductor 31 may be different from the width of the conductor portion C3b of the coil conductor 71. Similarly, the width of the conductor portion C2b of the electrode conductor 45 may be different from the width of the conductor portion C3b of the coil conductor 77. The widths of the conductor portions C3a of the multiple coil conductors 71 to 77 may be different from one another.

[0106] For example, the number of the electrode conductors 31 to 35, 41 to 45 in each of the external electrodes 3, 4 may be less than the number of the coil conductors 71 to 77 in the coil 7 by three or more. [Explanation of symbols]

[0107] 1, 1A, 1B... laminated coil component, 2... element body, 2a... main surface, 2b, 2c... side surface, 2d, 2e... end surface, 3, 3A, 3B, 4, 4A, 4B... external electrodes, 7, 7A, 7B... coil, C1a, C1b, C2a, C2b, C3a, C3b, C11a, C11b, C12a, C12b, C13a, C13b, C21a, C21b, C22a, C22b, C23a, C23b... conductor portion, 31-35, 41-45, 131-136, 141-146, 231-235, 241-245... electrode conductors, 71-77, 171-178, 271-277... coil conductors, D1... first direction, D2... second direction.

Claims

1. an element body having a main surface constituting a mounting surface, first and second side surfaces opposing each other in a first direction, and a pair of end surfaces opposing each other in a second direction; A coil disposed within the body; an external electrode electrically connected to the coil and disposed on the element body; The coil includes a plurality of coil conductors arranged in the first direction and connected to each other, the external electrode includes a plurality of electrode conductors arranged in the first direction and connected to each other; The plurality of coil conductors include a plurality of first coil conductors located in the same layer as the plurality of electrode conductors; a second coil conductor electrically connected to a first outermost electrode conductor located closest to the first side surface among the plurality of electrode conductors; a third coil conductor electrically connected to a second outermost electrode conductor located closest to the second side surface among the plurality of electrode conductors, each of the first outermost electrode conductor and the second outermost electrode conductor has a first conductor portion arranged so as to be exposed at least on the main surface, and a second conductor portion that is continuous with the first conductor portion and protrudes into the element body when viewed from the first direction, the second coil conductor overlaps with the second conductor portion of the first outermost electrode conductor when viewed from the first direction and is electrically connected to the second conductor portion of the first outermost electrode conductor, the third coil conductor overlaps with the second conductor portion of the second outermost electrode conductor when viewed from the first direction, and is electrically connected to the second conductor portion of the second outermost electrode conductor. Multilayer coil components.

2. each of the second coil conductor and the third coil conductor has a third conductor portion that forms a part of a circular track in the coil, and a fourth conductor portion that is continuous with the third conductor portion and protrudes outside the circular track when viewed from the first direction, the fourth conductor portion of the second coil conductor overlaps with the second conductor portion of the first outermost electrode conductor when viewed from the first direction, and is electrically connected to the second conductor portion of the first outermost electrode conductor, 2. The laminated coil component according to claim 1, wherein the fourth conductor portion of the third coil conductor overlaps with the second conductor portion of the second outermost electrode conductor when viewed from the first direction, and is electrically connected to the second conductor portion of the second outermost electrode conductor.

3. the second conductor portion of the first outermost electrode conductor and the fourth conductor portion of the second coil conductor are connected in the first direction, 3. The laminated coil component according to claim 2, wherein the second conductor portion of the second outermost electrode conductor and the fourth conductor portion of the third coil conductor are connected in the first direction.

4. a width of the second conductor portion of the first outermost electrode conductor is different from a width of the fourth conductor portion of the second coil conductor; a width of the second conductor portion of the second outermost electrode conductor is different from a width of the fourth conductor portion of the third coil conductor; The laminated coil component according to claim 2 or 3.

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