Laminated coil components

Abstract

To provide a laminated coil component that suppresses performance degradation. [Solution] The laminated coil component 1 comprises a base body 2, a coil 7, and external electrodes 3 and 4. The base body 2 has a main surface 2a, side surfaces 2b and 2c facing each other in a first direction D1, and a pair of end surfaces 2d and 2e facing each other in a second direction. The external electrodes 3 and 4 are electrically connected to the coil 7. The coil 7 has a plurality of coil conductors 71 to 77 arranged in the first direction D1. The external electrodes 3 and 4 have a plurality of electrode conductors 31 to 35 and 41 to 45 arranged in the first direction D1. The plurality of coil conductors 72 to 76 are located in the same layer as the plurality of electrode conductors 31 to 35 and 41 to 45. Coil conductor 71 is not located in the same layer as any of the plurality of electrode conductors 31 to 35 and 41 to 45. Coil conductor 77 is not located in the same layer as any of the plurality of electrode conductors 31 to 35 and 41 to 45.

Description

Technical Field

[0001] The present invention relates to a multilayer coil component.

Background Art

[0002] There is known a multilayer coil component including a 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

Summary of the Invention

Problems to be Solved by the Invention

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

[0005] Each of the plurality of aspects of the present invention aims to provide a multilayer coil component that suppresses characteristic deterioration.

Means for Solving the Problems

[0006] A laminated coil component according to a first aspect of the present invention comprises a base body, a coil, and an external electrode. The base 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 a second direction. The coil is disposed within the base body. The external electrode is electrically connected to the coil and is also disposed within the base body. The coil has a plurality of coil conductors arranged in a first direction and connected to each other. The external electrode has a plurality of electrode conductors arranged in a first direction and connected to each other. The plurality of coil conductors includes 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 the 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 the second outermost electrode conductor located closest to the second side surface among the plurality of electrode conductors.

[0007] In the first embodiment described above, the multiple electrode conductors are located in the same layer as the multiple first coil conductors, but not in the same layer as the second and third coil conductors. Therefore, compared to a configuration in which the multiple electrode conductors are also located in the same layer as the second and third coil conductors, the volume of the external electrodes relative to the base material in the first direction is small. Consequently, in the first embodiment described above, peeling of the external electrodes from the base material due to the difference in thermal expansion or contraction coefficients between the base material and the external electrodes is less likely to occur. As a result, deterioration of the characteristics of the laminated coil component is suppressed.

[0008] In the first embodiment described above, each of the first outermost electrode conductor and the second outermost electrode conductor may have a first conductor portion that is at least exposed to the main surface and a second conductor portion that is continuous with the first conductor portion and protrudes into the element 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 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 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 that protrudes into the element when viewed from the first direction, and when 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 secure.

[0009] In the first embodiment described above, each of the second coil conductor and the third coil conductor may have a third conductor portion that constitutes part of the annular trajectory in the coil, and a fourth conductor portion that is continuous with the third conductor portion and protrudes outside the annular trajectory 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 trajectory of the coil when viewed from the first direction, and when the fourth conductor portions of the second and third coil conductors overlap with the second conductor portions of the first and second outermost electrode conductors when viewed from the first direction, the connection between the coil and the external electrode is made more secure.

[0010] In the first embodiment described above, the second conductor portion of the first outermost electrode conductor and the fourth conductor portion of the second coil conductor may be connected in the 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 the 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 and fourth conductor portions located in different layers are properly connected, and the electrical connection between the coil and the external electrode is maintained more reliably. As a result, the degradation of the characteristics of the laminated coil component is suppressed.

[0011] In the first embodiment described above, the first coil conductor located in the same layer as the first outermost electrode conductor may overlap with the second coil conductor when viewed from the first direction and may also 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 with the third coil conductor when viewed from the first direction and may also be continuous with the second outermost electrode conductor. If the first coil conductor, located in the same layer as the first outermost electrode conductor, is continuous with the first outermost electrode conductor, the continuous portion between the first coil conductor and the first outermost electrode conductor may overlap with the second coil conductor in the first direction. Similarly, if the first coil conductor, located in the same layer as the second outermost electrode conductor, is continuous with the second outermost electrode conductor, the continuous portion between the first coil 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 DC resistance of the coil decreases, thus improving the characteristics of the laminated coil component.

[0012] A laminated coil component according to a second aspect of the present invention comprises a base body, a coil, and an external electrode. The base 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 arranged inside the base body such that its coil axis direction is aligned with the first direction. The external electrode is electrically connected to the coil and is also located inside the base 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 embodiment described above, 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 second embodiment, the volume of the external electrode relative to the base material in the first direction is smaller compared to a configuration in which the length of the external electrode in the first direction is greater than or equal to the length of the coil in the first direction. Consequently, in the second embodiment, peeling of the external electrode from the base material due to the difference in thermal expansion or contraction coefficients between the base material and the external electrode is less likely to occur. 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 comprises a base body, a coil, and an external electrode. The base 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 arranged inside the base body such that its coil axis direction is along the first direction. The external electrode is electrically connected to the coil and is also located inside the base 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 embodiment described above, 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 embodiment, the volume of the external electrode relative to the base material in the first direction is smaller compared to a configuration in which both ends of the coil in the first direction are not exposed from the external electrode in the first direction. Consequently, in the third embodiment, peeling of the external electrode from the base material due to the difference in thermal expansion coefficient or thermal contraction coefficient between the base material and the external electrode is less likely to occur. As a result, deterioration of the characteristics of the laminated coil component is suppressed.

[0016] In each of the above embodiments, the external electrodes may be arranged on the body such that they are exposed only on the corresponding end face and the main face of a pair of end faces. When the external electrodes are positioned on the substrate such that they are exposed only on the corresponding end face and the main face of a pair of end faces, the contact area between the laminated coil component and the electronic device when the component is mounted on the electronic device is sufficiently secured within the exposed surface of the external electrodes.

[0017] In each of the above embodiments, the external electrodes may be arranged on the body so as to be exposed only on the main surface. When the external electrodes are positioned on the substrate so that they are exposed only on the main surface, the volume of the external electrodes relative to the substrate is reduced. Therefore, delamination of the external electrodes from the substrate due to differences in thermal expansion or contraction rates between the substrate and the external electrodes is less likely to occur. As a result, the degradation of the characteristics of the laminated coil component is further suppressed.

[0018] A laminated coil component according to a fourth aspect of the present invention comprises a base body, a coil, and an external electrode. The coil is located within the base body. The external electrode is electrically connected to the coil and is located within the base body. The coil has a plurality of coil conductors that are aligned in the coil axis direction and connected to one another. The plurality of coil conductors includes a pair of outermost coil conductors located in the coil axis direction. The external electrode has a plurality of electrode conductors that are aligned in the coil axis direction and connected to one another. The plurality of electrode conductors includes a pair of outermost electrode conductors located 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 and is electrically connected to the coil.

[0019] In the fourth embodiment described above, 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, compared to 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, the volume of the external electrode relative to the base material in the first direction is smaller. Consequently, in the fourth embodiment described above, peeling of the external electrode from the base material due to the difference in thermal expansion coefficient or thermal contraction coefficient between the base material and the external electrode is less likely to occur. As a result, deterioration of the characteristics of the laminated coil component is suppressed.

Advantages of the Invention

[0020] According to each of the above aspects of the present invention, a laminated coil component that suppresses characteristic deterioration is provided.

Brief Description of the Drawings

[0021] [Figure 1] It is a perspective view showing a laminated coil component according to the first embodiment. [Figure 2] It is a perspective view showing a laminated coil component according to the first embodiment. [Figure 3] It is a plan view showing a laminated coil component according to the first embodiment. [Figure 4] It is an exploded view showing the configuration of a laminated coil component according to the first embodiment. [Figure 5] It is a view showing the configuration of a coil conductor and an electrode conductor. [Figure 6] It is a view showing the configuration of a coil conductor and an electrode conductor. [Figure 7] It is a plan view showing a laminated coil component according to a modified example. [Figure 8] It is an exploded view showing the configuration of a laminated coil component according to a modified example. [Figure 9] It is a perspective view showing a laminated coil component according to the second embodiment. [Figure 10] It is a plan view showing a laminated coil component according to the second embodiment. [Figure 11] It is an exploded view showing the configuration of a laminated coil component according to the second embodiment.

Modes for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals will be used for the same elements or elements having the same function, and duplicate descriptions will be omitted.

[0023] (First Embodiment) The configuration of the laminated coil component 1 according to the first embodiment will be described with reference to Figures 1 to 4. Figures 1 and 2 are perspective views showing the laminated coil component according to this embodiment. Figure 3 is a plan view showing the laminated coil component. Figure 4 is an exploded view showing the configuration of the laminated coil component. The laminated coil component 1 comprises a base body 2, a pair of external electrodes 3 and 4, and a coil 7.

[0024] Body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and edges, and a rectangular parallelepiped shape with rounded corners and edges. 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 the 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 the second direction D2. The direction perpendicular to the main surface 2a is the third direction D3. In this embodiment, the first direction D1 is the short side direction of body 2. The second direction D2 is the long side direction of body 2 and is perpendicular to the first direction D1. The third direction D3 is the height direction of body 2 and is perpendicular to the first direction D1 and the second direction D2. For example, if side 2b constitutes the first side, then side 2c constitutes the second side.

[0025] The main surface 2a is aligned with the first direction D1 and the second direction D2. The pair of side surfaces 2b and 2c are aligned with the second direction D2 and the third direction D3. The pair of end surfaces 2d and 2e are aligned with the first direction D1 and the third direction D3. The main surface 2a connects the pair of side surfaces 2b and 2c. The main surface 2a also connects the pair of end surfaces 2d and 2e. The laminated coil component 1 is solder-mounted to electronic equipment, for example. Electronic equipment is, for example, a circuit board or electronic components. In the laminated coil component 1, the main surface 2a constitutes the mounting surface facing the electronic equipment.

[0026] The base body 2 has a plurality of insulating layers 21 as shown in Figure 4. The base body 2 is constructed by stacking the plurality of insulating layers 21 in a first direction D1. In the actual base body 2, each insulating layer 21 may be integrated to such an extent that the boundaries between each insulating layer 21 are not visible. Each insulating layer 21 is made of, for example, 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 insulating layer 21 is made of, for example, a sintered body of a green sheet containing a magnetic material. The magnetic material constituting each insulating layer 21 may include an Fe alloy. Each insulating layer 21 may be made of a non-magnetic material. The non-magnetic material includes, for example, a glass ceramic material or a dielectric material.

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

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

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

[0030] Each electrode conductor 31-35 contains a conductive material. The conductive material is, for example, Ag or Pd. Each electrode conductor 31-35 is configured, for example, as a sintered body of a conductive paste containing 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 formed, for example, by electroplating or electroless plating. The plating layer contains, for example, Ni, Sn, or Au.

[0031] Electrode conductor 31 is the outermost electrode conductor among the multiple electrode conductors 31-35, located furthest out in the first direction D1. More specifically, electrode conductor 31 is the first outermost electrode conductor among the multiple electrode conductors 31-35, located closest to the side surface 2b. Electrode conductor 31 has conductor portions C1a and C1b. Conductor portion C1a is the first conductor portion, which is exposed to at least the main surface 2a. In this embodiment, conductor portion C1a is exposed to the main surface 2a and the end surface 2d. Conductor portion C1a has a substantially L-shape when viewed from the first direction D1. Conductor portion C1b is the second conductor portion, which protrudes into the body 2 when viewed from the first direction D1. Conductor portion C1b extends in a direction that intersects the second direction D2 and the third direction D3 when viewed from the first direction D1. Conductor portion C1b is continuous with conductor portion C1a of electrode conductor 31.

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

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

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

[0035] Each electrode conductor 41-45 contains a conductive material. The conductive material is, for example, Ag or Pd. Each electrode conductor 41-45 is configured, for example, as a sintered body of a conductive paste containing 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 formed, for example, by electroplating or electroless plating. The plating layer contains, for example, Ni, Sn, or Au.

[0036] Electrode conductor 41 is the outermost electrode conductor among the multiple electrode conductors 41-45, located furthest out in the first direction D1. More specifically, electrode conductor 41 is the first outermost electrode conductor among the multiple electrode conductors 41-45, located closest to the side surface 2b. Electrode conductor 41 has a conductor portion C2a. Conductor portion C2a is a first conductor portion that is exposed to at least the main surface 2a. In this embodiment, conductor portion C2a is exposed to the main surface 2a and the end surface 2e. Conductor portion C2a has a substantially L-shape when viewed from the first direction D1.

[0037] Electrode conductors 42-44 are electrode conductors located between electrode conductor 41 and electrode conductor 45 in the first direction D1. Each electrode conductor 42-44, like electrode conductor 41, has a conductive portion C2a that is exposed to at least the main surface 2a. In this embodiment, the shape and position of the conductive portion C2a of each electrode conductor 42-44 are the same as the shape and position of the conductive portion C2a of electrode conductor 41.

[0038] Electrode conductor 45 is the outermost electrode conductor among the multiple electrode conductors 41-45, located furthest out in the first direction D1. More specifically, electrode conductor 45 is the second outermost electrode conductor among the multiple electrode conductors 41-45, located closest to the side surface 2c. 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 electrode conductor 45 are the same as those of the conductor portion C2a of electrode conductor 41. Therefore, the conductor portions C2a of the multiple electrode conductors 41-45 overlap each other when viewed from the first direction D1. Conductor portion C2b is a second conductor portion that protrudes into the element 2 when viewed from the first direction D1. Conductor portion C2b extends in directions that intersect with the second direction D2 and the third direction D3 when viewed from the first direction D1. Conductor portion C2b is continuous with the conductor portion C2a of electrode conductor 45.

[0039] As shown in Figure 3, coil 7 is arranged within the body 2 such that the coil axis direction of coil 7 is aligned with the first direction D1. Coil 7 has multiple coil conductors 71, 72, 73, 74, 75, 76, and 77. Coil 7 is constructed by stacking multiple coil conductors 71 to 77 in the first direction D1. In this embodiment, the number of multiple coil conductors 71 to 77 is "7". The number of multiple coil conductors in coil 7 is greater than the number of multiple electrode conductors each of the pair of external electrodes 3 and 4 has. In other words, each of the pair of external electrodes 3 and 4 is composed of fewer layers than coil 7. Coil conductors 71, 72, 73, 74, 75, 76, and 77 are stacked in this order from side 2b toward side 2c. The multiple coil conductors 71 to 77 are aligned in the first direction D1, that is, along the coil axis direction of coil 7.

[0040] Multiple coil conductors 71-77 are connected to one another. This means that multiple coil conductors 71-77 are electrically and physically connected to one another. In an actual coil 7, each coil conductor 71-77 may be integrated to such an extent that the boundaries between them are not visible.

[0041] Each coil conductor 71-77 contains a conductive material. The conductive material is, for example, Ag or Pd. Each coil conductor 71-77 is constructed, for example, as a sintered body of a conductive paste containing conductive material powder. The conductive material powder is, for example, Ag powder or Pd powder. Each coil conductor 71-77 may contain the same conductive material as each external electrode 3,4, or it may contain a different conductive material than each external electrode 3,4.

[0042] As shown in Figure 3, coil conductor 71 is the outermost coil conductor among the multiple coil conductors 71-77, located in the coil axis direction of coil 7. Coil conductor 71 is located at the end of coil 7 in the coil axis direction of coil 7. Coil conductor 71 is located closest to side 2b among the multiple coil conductors 71-77. Coil conductor 71 is the second coil conductor located between coil conductor 72 and side 2b. As shown in Figure 4, coil conductor 71 is not located on the same layer as any of the multiple electrode conductors 31-35 or the multiple electrode conductors 41-45. That is, the outermost electrode conductors 31 and 41 are not located on the same layer as coil conductor 71, which is the outermost coil conductor. Electrode conductors 31 and 41 are located inside coil 7 in the first direction D1, relative to coil conductor 71.

[0043] The coil conductor 71 has conductor portions C3a and C3b. Conductor portion C3a of the coil conductor 71 is a third conductor portion that constitutes part of the annular trajectory in the coil 7. Conductor portion C3a of the coil conductor 71 extends so as to surround the coil axis of the coil 7. One end of conductor portion C3a of the coil conductor 71 is connected to one end of conductor portion C3a of the coil conductor 72 in the first direction D1. One end of conductor portion C3a of the coil conductor 71 is physically directly connected to one end of conductor portion C3a of the coil conductor 72. One end of conductor portion C3a of the coil conductor 71 may be integrated with one end of conductor portion C3a of the coil conductor 72 to such an extent that the boundary is not visible. Conductor portion C3b of the coil conductor 71 is a fourth conductor portion that protrudes outside the annular trajectory of the coil 7 when viewed from the first direction D1. The conductor portion C3b of the coil conductor 71 extends in a direction that intersects 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 directly connected 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 is not visible.

[0044] The multiple coil conductors 72-76 are multiple first coil conductors located on the same layer as the multiple electrode conductors 31-35 and the multiple electrode conductors 41-45. Each coil conductor 72-76, like coil conductor 71, has a conductive portion C3a that forms part of the annular trajectory in coil 7. The conductive portion C3a of each coil conductor 72-76 extends to surround the coil axis of coil 7. Coil conductor 72 is located on the same layer as electrode conductors 31 and 41. Coil conductor 72 is located closest to the side 2b of the multiple coil conductors 72-76. The other end of the conductive portion C3a of coil conductor 72 is connected to one end of the conductive portion C3a of coil conductor 73 in the first direction D1. The other end of the conductive portion C3a of coil conductor 72 is physically directly connected to one end of the conductive portion C3a of 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 such an extent that the boundary is not visible.

[0045] The coil conductor 73 is located on 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 directly connected 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 the extent that the boundary is not visible. The coil conductor 74 is located on 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 directly connected 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 such an extent that the boundary is not visible.

[0046] The coil conductor 75 is located on 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 directly connected 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 the extent that the boundary is not visible. The coil conductor 76 is located on the same layer as the electrode conductors 35 and 45. The coil conductor 76 is located closest to the side 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 physically directly 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 one end of the conductor portion C3a of the coil conductor 77 to such an extent that the boundary is not visible.

[0047] As shown in Figure 3, coil conductor 77 is the outermost coil conductor among the multiple coil conductors 71-77, located in the coil axis direction of coil 7. Coil conductor 77 is located at the end of coil 7 in the coil axis direction of coil 7. Coil conductor 77 is located closest to side 2c among the multiple coil conductors 71-77. Coil conductor 77 is the third coil conductor located between coil conductor 76 and side 2c. As shown in Figure 4, coil conductor 77 is not located on the same layer as any of the multiple electrode conductors 31-35 or the multiple electrode conductors 41-45. That is, the outermost electrode conductors 35 and 45 are not located on the same layer as coil conductor 77, which is the outermost coil conductor. Electrode conductors 35 and 45 are located inside coil 7 in the first direction D1, relative to coil conductor 77.

[0048] The coil conductor 77, like the coil conductor 71, has conductor portions C3a and C3b. Conductor portion C3a of the coil conductor 77 is a third conductor portion that constitutes part of the annular trajectory in the coil 7. Conductor portion C3a of the coil conductor 77 extends so as to surround the coil axis of the coil 7. Conductor portion C3b of the coil conductor 77 is a fourth conductor portion that, when viewed from the first direction D1, protrudes outside the annular trajectory of the coil 7. Conductor portion C3b of the coil conductor 77 extends in a direction that intersects the second direction D2 and the third direction D3 when viewed from the first direction D1. Conductor portion C3b of the coil conductor 77 is continuous with conductor portion C3a of the coil conductor 77. In this embodiment, one end of conductor portion C3b of the coil conductor 77 is continuous with the other end of conductor portion C3a of the coil conductor 77. The other end of the conductive portion C3b of the coil conductor 77 is connected to the conductive portion C2b of the electrode conductor 45 in the first direction D1. The other end of the conductive portion C3b of the coil conductor 77 is physically directly connected to the conductive portion C2b of the electrode conductor 45. The other end of the conductive portion C3b of the coil conductor 77 may be integrated with the conductive portion C2b of the electrode conductor 45 to such an extent that the boundary is not visible.

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

[0050] The lengths L1 of the external electrode 3 and 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. Length L1 is defined, for example, by the maximum width of the external electrode 3 in the first direction D1. Length L2 is defined, for example, by the maximum width of the external electrode 4 in the first direction D1. Length L3 is defined, for example, by the distance in the first direction D1 between a virtual plane that is parallel to the side surface 2b and in contact with the coil conductor 71 and a virtual plane that is parallel to the side surface 2c and in contact with the coil conductor 77. In this embodiment, length L3 is the distance in the first direction D1 between the surface of the coil conductor 71 on the side surface 2b side and the surface of the coil conductor 77 on the side surface 2c side. For example, if the base body 2 is of size 0201 (length in the second direction D2 is 0.250 mm, and length in the first direction D1 is 0.125 mm), then lengths L1 and L2 are, for example, between 70 μm and 100 μm, and length L3 is, for example, between 85 μm and 115 μm. Lengths L1, L2, and L3 may differ depending on the size of the base body 2.

[0051] Referring to Figure 5, the connection configurations between the coil conductor 71 and the electrode conductor 31, and between the coil conductor 71 and the coil conductor 72 will be explained. Figure 5 is a view of the layer on which the coil conductor 71 is formed and the layer on which the coil conductor 72 is formed, as seen from the first direction D1. In Figure 5, for illustrative purposes, the conductor portion C3b of the coil conductor 71 and the conductor portion C1b of the electrode conductor 31 are intentionally offset from each other. In reality, the outer edge of the conductor portion C3b of the coil conductor 71 along the direction of extension has a portion that overlaps with the outer edge of the conductor portion C1b of the electrode conductor 31 along the direction of extension. Similarly, in Figure 5, the conductor portion C3a of the coil conductor 71 and the conductor portion C3a of the coil conductor 72 are intentionally offset from each other. In reality, the outer edge of the conductor portion C3a of the coil conductor 71 along the direction of extension has a portion that overlaps with the outer edge of the conductor portion C3a of the coil conductor 72 along the direction of extension.

[0052] As shown in Figure 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 this embodiment, the end of the 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 the 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 them 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 equivalent to the width of the conductor portion C1b of the electrode conductor 31. In the following, "equivalent" does not necessarily mean that the values ​​are exactly the same. Values ​​may be considered equivalent even if they include slight differences within a predetermined range, manufacturing tolerances, or measurement errors.

[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 this 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 this 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 portion. In the 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 them 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 equivalent to the width of the conductor portion C3a of the coil conductor 72.

[0054] Referring to Figure 6, the connection configurations between the coil conductor 77 and the electrode conductor 45, and between the coil conductor 77 and the coil conductor 76 will be explained. Figure 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 seen from the first direction D1. In Figure 6, for illustrative purposes, the conductor portion C3b of the coil conductor 77 and the conductor portion C2b of the electrode conductor 45 are intentionally offset from each other. In reality, the outer edge of the conductor portion C3b of the coil conductor 77 along the direction of extension has a portion that overlaps with the outer edge of the conductor portion C2b of the electrode conductor 45 along the direction of extension. Similarly, in Figure 6, the conductor portion C3a of the coil conductor 77 and the conductor portion C3a of the coil conductor 76 are intentionally offset from each other. In reality, the outer edge of the conductor portion C3a of the coil conductor 77 along the direction of extension has a portion that overlaps with the outer edge of the conductor portion C3a of the coil conductor 76 along the direction of extension.

[0055] As shown in Figure 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 this embodiment, the end of the 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 the 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 them 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 equivalent 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 this 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 this 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 portion. 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 them 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 equivalent to the width of the conductor portion C3a of the coil conductor 76.

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

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

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

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

[0061] In the laminated coil component 1 according to this embodiment, the lengths of the external electrodes 3 and 4 in the first direction D1 are smaller than the length of the coil 7 in the first direction D1. Therefore, in this embodiment, the volume of the external electrodes 3 and 4 relative to the base body 2 in the first direction D1 is smaller compared to a configuration in which the lengths of the external electrodes 3 and 4 in the first direction D1 are greater than or equal to the length of the coil 7 in the first direction D1. Consequently, in this embodiment, peeling of the external electrodes 3 and 4 from the base body 2 due to the difference in thermal expansion coefficient or thermal contraction coefficient between the base body 2 and the external electrodes 3 and 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 this embodiment, when the external electrodes 3 and 4 and the coil 7 are viewed from a third direction D3, both ends of the coil 7 in the first direction D1 are exposed from the external electrodes 3 and 4 in the first direction D1. That is, the length of the external electrodes 3 and 4 in the first direction D1 is smaller than the length of the coil 7 in the first direction D1. Therefore, in this embodiment, the volume of the external electrodes 3 and 4 relative to the base body 2 in the first direction D1 is smaller compared to a configuration in which both ends of the coil 7 in the first direction D1 are not exposed from the external electrodes 3 and 4 in the first direction D1. Consequently, in this embodiment, peeling of the external electrodes 3 and 4 from the base body 2 due to the difference in thermal expansion coefficient or thermal contraction coefficient between the base body 2 and the external electrodes 3 and 4 is less likely to occur. As a result, deterioration of the characteristics of the laminated coil component 1 is suppressed.

[0063] The external electrodes 3 and 4 are positioned on the base body 2 such that they are exposed only on the corresponding end faces 2d and 2e of the pair of end faces 2d and 2e and on the main surface 2a. When the external electrodes 3 and 4 are arranged on the base body 2 such that they are exposed only on the corresponding end faces 2d and 2e of the pair of end faces 2d and 2e and on the main surface 2a, the contact area between the laminated coil component 1 and the electronic device when it is mounted on the electronic device is sufficiently secured within the exposed surfaces of the external electrodes 3 and 4.

[0064] In the laminated coil component 1 according to this embodiment, the coil 7 has a plurality of coil conductors 71 to 77 arranged in the coil axis direction, and the external electrodes 3 and 4 have a plurality of electrode conductors 31 to 35 and 41 to 45 arranged in the coil axis direction. Each of the electrode conductors 31, 35, 41, and 45 is not located in the same layer as the coil conductors 71 and 77. Therefore, compared to a configuration in which each of the electrode conductors 31, 35, 41, and 45 is located in the same layer as the coil conductors 71 and 77, the volume of the external electrodes 3 and 4 relative to the base body 2 in the first direction D1 is small. Consequently, in this embodiment, peeling of the external electrodes 3 and 4 from the base body 2 due to the difference in thermal expansion coefficient or thermal contraction coefficient between the base body 2 and the external electrodes 3 and 4 is less likely to occur. As a result, deterioration of the characteristics of the laminated coil component 1 is suppressed.

[0065] (modified version) Next, the configuration of the laminated coil component 1A according to a modified example of this embodiment will be described with reference to Figures 7 and 8. Figure 7 is a plan view showing the laminated coil component 1A according to the modified example. Figure 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 first embodiment described above in terms of the configuration of the electrode conductor and the coil conductor. The differences between the first embodiment described above and this modified example will be mainly described below.

[0066] The laminated coil component 1A comprises a base 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 as shown in Figure 8. The external electrode 3A is constructed by stacking the plurality of electrode conductors 131 to 136 in the first direction D1. In this modified example, the number of electrode conductors 131 to 136 is "6". Electrode conductors 131, 132, 133, 134, 135, and 136 are stacked in this order from side 2b toward side 2c. The plurality of electrode conductors 131 to 136 are aligned in the first direction D1 and are connected to each other. The plurality of electrode conductors 131 to 136 are physically directly connected to each other. Each electrode conductor 131 to 136 may be integrated to such an extent that the boundaries between each electrode conductor 131 to 136 are not visible.

[0067] Electrode conductor 131 is the outermost electrode conductor located in the first direction D1 among a plurality of electrode conductors 131 to 136. More specifically, electrode conductor 131 is the first outermost electrode conductor located closest to the side surface 2b among a plurality of electrode conductors 131 to 136. Electrode conductor 131 has conductor portions C11a and C11b. Conductor portion C11a is a first conductor portion arranged to be exposed at least on the main surface 2a. Similar to the first embodiment described above, in this modified example, conductor portion C11a is exposed on the main surface 2a and the end surface 2d. Conductor portion C11a has a substantially L-shape when viewed from the first direction D1. Conductor portion C11b is a second conductor portion that protrudes into the body 2 when viewed from the first direction D1. Conductor portion C11b extends in a direction that intersects the second direction D2 and the third direction D13 when viewed from the first direction D1. One end of the conductor portion C11b is continuous with the conductor portion C11a of the electrode conductor 131. In the above embodiment, as shown in Figure 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 which is located on the same layer as the electrode conductor 31. In this modified example, as shown in Figure 8, the end of the conductor portion C11b that is not continuous with the conductor portion C11a is continuous with the coil conductor 172 which is located on the same layer as the electrode conductor 131.

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

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

[0070] Electrode conductor 141 is the outermost electrode conductor among the multiple electrode conductors 141 to 146, located furthest out in the first direction D1. More specifically, electrode conductor 141 is the first outermost electrode conductor among the multiple electrode conductors 141 to 146, located closest to the side surface 2b. Electrode conductor 141 has a conductor portion C12a. Conductor portion C12a is a first conductor portion that is exposed to at least the main surface 2a. In this modified example, conductor portion C12a is exposed to the main surface 2a and the end surface 2e. Conductor portion C12a has a substantially L-shape when viewed from the first direction D1.

[0071] Electrode conductors 142 to 145 are electrode conductors located between electrode conductor 141 and electrode conductor 146 in the first direction D1. Each electrode conductor 142 to 145 has a conductive portion C12a that is exposed to at least the main surface 2a, similar to electrode conductor 141. The shape and position of the conductive portion C12a of each electrode conductor 142 to 144 are the same as the shape and position of the conductive portion C12a of electrode conductor 141.

[0072] Electrode conductor 146 is the outermost electrode conductor located in the first direction D1 among the multiple electrode conductors 141 to 146. More specifically, electrode conductor 146 is the second outermost electrode conductor located closest to the side surface 2c among the multiple electrode conductors 141 to 146. Electrode conductor 146 has a conductor portion C12a and a conductor portion C12b. In this modified example, 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 electrode conductor 141. Therefore, the conductor portions C12a of the multiple electrode conductors 141 to 146 overlap each other when viewed from the first direction D1. Conductor portion C12b is a second conductor portion that protrudes into the element 2 when viewed from the first direction D1. Conductor portion C12b extends in directions that intersect with the second direction D2 and the third direction D3 when viewed from the first direction D1. One end of the conductor portion C12b is continuous with the conductor portion C12a of the electrode conductor 146. In the above embodiment, as shown in Figure 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 which is located on the same layer as the electrode conductor 45. In this modified example, as shown in Figure 8, the end of the conductor portion C12b that is not continuous with the conductor portion C12a is continuous with the coil conductor 177 which is located on the same layer as the electrode conductor 146.

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

[0074] As shown in Figure 7, coil conductor 171 is the outermost coil conductor among the multiple coil conductors 171-178, located in the coil axis direction of coil 7A. Coil conductor 171 is located at the end of coil 7A in the coil axis direction of coil 7A. Coil conductor 171 is located closest to side 2b among the multiple coil conductors 171-178. Coil conductor 171 is the second coil conductor located between coil conductor 172 and side 2b. As shown in Figure 8, coil conductor 171 is not located on the same layer as any of the multiple electrode conductors 131-136 or the multiple electrode conductors 141-146. That is, the outermost electrode conductors 131 and 141 are not located on the same layer as coil conductor 171, which is the outermost coil conductor.

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

[0076] Multiple coil conductors 172-176 are first coil conductors located on the same layer as multiple electrode conductors 131-136 and multiple electrode conductors 141-146. Coil conductor 172 is located on the same layer as electrode conductors 131 and 141. Coil conductor 172, like coil conductor 171, has a conductor portion C13a and a conductor portion C13b. The shape and position of the conductor portions C13a and C13b of coil conductor 172 are the same as those of the conductor portions C13a and C13b of coil conductor 171. Therefore, in this modified example, the entire coil conductor 172 overlaps with coil conductor 171 when viewed from the first direction D1. The entire coil conductor 172 is connected to coil conductor 171 in the first direction D1. The entire coil conductor 172 is physically directly connected to coil conductor 171. The entire coil conductor 172 may be integrated with coil conductor 171 to the extent that the boundary is not visible. The ends of the conductive portion C13b of the coil conductor 172 that are not continuous with the conductive portion C13a are continuous with the conductive portion C11b of the electrode conductor 131, which is located in the same layer. The continuous portion between the coil conductor 172 and the electrode conductor 131 overlaps with 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 conductive portion C13a that extends to surround the coil axis of the coil 7A. One end of the conductive portion C13a of the coil conductor 173 is connected to one end of the conductive portion C13a of the coil conductor 172 in the first direction D1. One end of the conductive portion C13a of the coil conductor 173 is physically directly connected to one end of the conductive portion C13a of the coil conductor 172. One end of the conductive portion C13a of the coil conductor 173 may be integrated with one end of the conductive portion C13a of the coil conductor 172 to such an extent that the boundary 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 conductive portion C13a that extends to surround the coil axis of the coil 7A. The shape and position of the conductive portions C13a and C13b of the coil conductor 174 are the same as those of the conductive portions C13a and C13b of the coil conductor 173. Therefore, in this modified example, 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 physically directly 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 is not visible.

[0079] The coil conductor 175 is located in the same layer as the electrode conductors 134 and 144. The coil conductor 175 has a conductive portion C13a that extends so as to surround the coil axis of the coil 7A. One end of the conductive portion C13a of the coil conductor 175 is connected to one end of the conductive portion C13a of the coil conductor 174 in the first direction D1. One end of the conductive portion C13a of the coil conductor 175 is physically directly connected to one end of the conductive portion C13a of the coil conductor 174. One end of the conductive portion C13a of the coil conductor 175 may be integrated with one end of the conductive portion C13a of the coil conductor 174 to such an extent that the boundary 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 conductive portion C13a that extends to surround the coil axis of the coil 7A. The shape and position of the conductive portions C13a and C13b of the coil conductor 176 are the same as those of the conductive portions C13a and C13b of the coil conductor 175. Therefore, in this modified example, 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 physically directly 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 is not visible.

[0081] The coil conductor 177 is located in the same layer as the electrode conductors 136 and 146. Like the coil conductor 172, the coil conductor 177 has a conducting portion C13a and a conducting portion C13b. The conducting portion C13a of the coil conductor 177 constitutes part of the annular trajectory in the coil 7A. The conducting portion C13b protrudes outside the annular trajectory of the coil 7A when viewed from the first direction D1. The shape and position of the conducting portions C13a and C13b of the coil conductor 177 are the same as those of the conducting 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 physically directly connected to the coil conductor 178. The entire coil conductor 177 may be integrated with the coil conductor 178 to such an extent that the boundary is not visible. Of the two 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 Figure 7, coil conductor 178 is the outermost coil conductor among the multiple coil conductors 171-178, located in the coil axis direction of coil 7A. Coil conductor 178 is located at the end of coil 7 in the coil axis direction of coil 7A. Coil conductor 178 is located closest to the side surface 2c among the multiple coil conductors 171-178. Coil conductor 178 is the third coil conductor located between coil conductor 177 and side surface 2c. As shown in Figure 8, coil conductor 178 is not located on the same layer as any of the multiple electrode conductors 131-136 or the multiple electrode conductors 141-146. That is, the outermost electrode conductors 136 and 146 are not located on the same layer as coil conductor 178, which is the outermost coil conductor. Coil conductor 178, like coil conductor 177, has a conductor portion C13a and a conductor portion C13b.

[0083] In this modified example, as in the first embodiment described above, the multiple electrode conductors 131-136 and 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 and 178. Therefore, compared to a configuration in which the multiple electrode conductors are also located in the same layer as the coil conductors 171 and 178, the volume of the external electrodes 3A and 4A relative to the base body 2 in the first direction D1 is smaller. Consequently, even in this modified example, peeling of the external electrodes 3A and 4A from the base body 2 due to the difference in thermal expansion or contraction coefficients between the base body 2 and the external electrodes 3A and 4A is less likely to occur. As a result, the degradation of the characteristics of the laminated coil component 1A is suppressed.

[0084] In this modified example, the coil conductor 172, 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, 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. If the coil conductor 172, located in the same layer as the electrode conductor 131, is continuous with the electrode conductor 131, the continuous portion between the coil conductor 172 and the electrode conductor 131 may overlap with the coil conductor 171 in the first direction D1. Similarly, if the coil conductor 177, located in the same layer as the electrode conductor 146, is continuous with the electrode conductor 146, the continuous portion between the coil conductor 177 and the electrode conductor 146 may overlap with the coil conductor 178 in the first direction D1. When an overlapping portion is formed, the DC resistance of the coil 7A decreases, thus improving the characteristics of the laminated coil component 1A.

[0085] (Second embodiment) Next, the configuration of the laminated coil component 1B according to a modified example of this embodiment will be described with reference to Figures 9 to 11. Figure 9 is a perspective view showing the laminated coil component 1B according to the second embodiment. Figure 10 is a plan view showing the laminated coil component 1B according to the second embodiment. Figure 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 first embodiment described above in terms of the configuration of the electrode conductor and the coil conductor. The differences between the first embodiment and the second embodiment described above will be explained below.

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

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

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

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

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

[0091] Electrode conductor 241 is the outermost electrode conductor located in the first direction D1 among a plurality of electrode conductors 241 to 245. More specifically, electrode conductor 241 is the first outermost electrode conductor located closest to the side surface 2b among the plurality of electrode conductors 241 to 245. Electrode conductor 241 has a conductor portion C22a. Conductor portion C22a is a first conductor portion that is exposed to at least the main surface 2a. In this embodiment, conductor portion C22a is exposed only to the main surface 2a.

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

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

[0094] As shown in Figure 10, coil 7B is positioned within the body 2 such that the coil axis direction of coil 7B is aligned with the first direction D1. Coil 7B has multiple coil conductors 271, 272, 273, 274, 275, 276, and 277. Coil 7B is constructed by stacking the multiple coil conductors 271 to 277 in the first direction D1. Coil conductors 271, 272, 273, 274, 275, 276, and 277 are stacked in this order from side 2b toward side 2c. The multiple coil conductors 271 to 277 are aligned in the first direction D1, i.e., along the coil axis direction of coil 7B. The multiple coil conductors 271 to 277 are connected to each other. The multiple coil conductors 271 to 277 are physically directly connected to each other. Each coil conductor 271 to 277 may be integrated to such an extent that the boundaries between each coil conductor 271 to 277 are not visible.

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

[0096] The coil conductor 271 has conductor portions C23a and C23b. Conductor portion C23a of the coil conductor 271 is a third conductor portion that forms part of the annular trajectory in the coil 7B. Conductor portion C23a of the coil conductor 271 extends so as to surround the coil axis of the coil 7B. One end of conductor portion C23a of the coil conductor 271 is connected to one end of conductor portion C23a of the coil conductor 272 in the first direction D1. One end of conductor portion C23a of the coil conductor 271 is physically directly connected to one end of conductor portion C23a of the coil conductor 272. One end of conductor portion C23a of the coil conductor 271 may be integrated with one end of conductor portion C23a of the coil conductor 272 to such an extent that the boundary is not visible. The conductor portion C23b of the coil conductor 271 is a fourth conductor portion that protrudes outside the annular trajectory of the coil 7B 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 extends along the third direction D3 when viewed from the first direction D1. 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 directly connected to the conductor portion C21b of the electrode conductor 231. The other end of the conductive portion C23b of the coil conductor 271 may be integrated with the conductive portion C21b of the electrode conductor 231 to such an extent that the boundary is not visible.

[0097] Multiple coil conductors 272-276 are first coil conductors located on the same layer as multiple electrode conductors 231-235 and multiple electrode conductors 241-245. Each coil conductor 272-276, like coil conductor 271, has a conductive portion C23a that constitutes part of the annular trajectory in coil 7B. Coil conductor 272 is located on the same layer as electrode conductors 231 and 241. The other end of the conductive portion C23a of coil conductor 272 is connected to one end of the conductive portion C23a of coil conductor 273 in the first direction D1. The other end of the conductive portion C23a of coil conductor 272 is physically directly connected to one end of the conductive portion C23a of coil conductor 273. The other end of the conductive portion C23a of coil conductor 272 may be integrated with one end of the conductive portion C23a of coil conductor 273 to the extent that the boundary 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 directly connected 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 the extent that the boundary 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 coil conductor 274 is physically directly connected to one end of the conductor portion C23a of coil conductor 275. The other end of the conductor portion C23a of coil conductor 274 may be integrated with one end of the conductor portion C23a of coil conductor 275 to such an extent that the boundary 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 in the first direction D1 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 is physically directly 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 the extent that the boundary 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 in the first direction D1 to one end of the conductor portion C23a of the coil conductor 277. The other end of the conductor portion C23a of coil conductor 276 is physically directly connected to one end of the conductor portion C23a of coil conductor 277. The other end of the conductor portion C23a of coil conductor 276 may be integrated with one end of the conductor portion C23a of coil conductor 277 to such an extent that the boundary is not visible.

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

[0101] The coil conductor 277, like the coil conductor 271, has conductor portions C23a and C23b. Conductor portion C23a of the coil conductor 277 is a third conductor portion that constitutes part of the annular trajectory in the coil 7B. Unlike the conductor portion C3b of the coil conductor 77 according to the first embodiment, the conductor portion C23b of the coil conductor 277 extends along the third direction D3 when viewed from the first direction D1. Conductor portion C23b of the coil conductor 277 is continuous with 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 conductive portion C23b of the coil conductor 277 is physically directly connected to the conductive portion C22b of the electrode conductor 245. The other end of the conductive portion C23b of the coil conductor 277 may be integrated with the conductive portion C22b of the electrode conductor 245 to such an extent that the boundary is not visible.

[0102] In the second embodiment, as in the first embodiment described above, the multiple electrode conductors 231-235 and 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 and 277. Therefore, compared to a configuration in which the multiple electrode conductors are also located in the same layer as the coil conductors 271 and 277, the volume of the external electrodes 3B and 4B relative to the base body 2 in the first direction D1 is smaller. Consequently, in the second embodiment as well, peeling of the external electrodes 3B and 4B from the base body 2 due to the difference in thermal expansion or contraction coefficients between the base body 2 and the external electrodes 3B and 4B is less likely to occur. As a result, the degradation of the characteristics of the laminated coil component 1B is suppressed.

[0103] In the second embodiment, the external electrodes 3B and 4B are arranged on the substrate 2 so as to be exposed only on the main surface 2a. When the external electrodes 3B and 4B are positioned on the base body 2 such that they are exposed only on the main surface 2a, the volume of the external electrodes 3B and 4B relative to the base body 2 becomes smaller. Therefore, peeling of the external electrodes 3B and 4B from the base body 2 due to the difference in thermal expansion or contraction coefficients between the base body 2 and the external electrodes 3B and 4B becomes less likely. As a result, the degradation of the characteristics of the laminated coil component 1B is further suppressed.

[0104] While embodiments of the present invention have been described above, the present invention is not necessarily limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0105] For example, the width of the conductive portion C1b of electrode conductor 31 may differ from the width of the conductive portion C3b of coil conductor 71. Similarly, the width of the conductive portion C2b of electrode conductor 45 may differ from the width of the conductive portion C3b of coil conductor 77. The widths of the conductive portions C3a of multiple coil conductors 71 to 77 may differ from each other.

[0106] For example, the number of electrode conductors 31-35 and 41-45 that each of the external electrodes 3 and 4 has may be three or more fewer than the number of coil conductors 71-77 that the coil 7 has. [Explanation of symbols]

[0107] 1,1A,1B...Laminated coil component, 2...Base 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 conductor, 71~77,171~178,271~277...Coil conductor, D1...First direction, D2...Second direction.

Claims

1. A base body having a main surface constituting the mounting surface, first and second side surfaces facing each other in the first direction, and a pair of end faces facing each other in the second direction, A coil arranged within the aforementioned body, The coil is electrically connected to an external electrode which is located on the base body, The coil has a plurality of coil conductors that are arranged in the first direction and connected to one another. The external electrode has a plurality of electrode conductors that are aligned in the first direction and connected to one another. The plurality of coil conductors are, Multiple first coil conductors located in the same layer as the aforementioned multiple electrode conductors, A second coil conductor is electrically connected to the first outermost electrode conductor, which is located closest to the first side surface among the plurality of electrode conductors, It includes a third coil conductor that is electrically connected to the second outermost electrode conductor, which is 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 that is at least exposed to 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 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 constitutes a part of the annular trajectory in the coil, and a fourth conductor portion that is continuous with the third conductor portion and protrudes outside the annular trajectory 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. 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. 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. The width of the second conductor portion of the first outermost electrode conductor is different from the width of the fourth conductor portion of the second coil conductor. The width of the second conductor portion of the second outermost electrode conductor is different from the 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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