Lamination coil component

Abstract

To provide a lamination coil component capable of suppressing deterioration of features while suppressing a peeling of a terminal electrode from an element body.SOLUTION: A lamination coil component 1 comprises: an element body 2 having a first surface 2d and second surfaces 2a and 2b extended to a direction orthogonal to the first surface 2d; a coil 7 arranged in the element body 2; and terminal electrodes 4 and 5 having first electrode parts 4a and 5a extended in the direction orthogonal to the first surface 2d along the second surfaces 2a and 2b. At least one part of the first electrode parts 4a and 5a of the terminal electrodes 4 and 5 is arranged in the element body 2, and the element 2 exists between virtual lines L1 and L3 extended to a direction parallel to the first surface 2d to the second surfaces 2a and 2b and the first surface 2d from a position mostly separated in the direction orthogonal to the first surface 2d to the first surface 2d in the first electrode parts 4a and 5a positioned in the element body 2.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] Known conventional laminated coil components include, for example, the one described in Patent Document 1. The laminated coil component described in Patent Document 1 includes an insulator layer having a first side extending in a first direction and a second side extending in a second direction, and an outer conductor layer provided at a first point where the first side and the second side intersect. In the laminated coil component described in Patent Document 1, a second point is defined as a position in the external conductor layer that is furthest from a first point to one side in the second direction in a portion that is furthest from the first point to one side in the first direction, and a third point is defined as a position in the external conductor layer that is furthest from the first point to one side in the first direction in a portion that is furthest from the first point to the one side in the second direction, and the external conductor layer has a fixing portion located in a region that has a third side connecting the second point and the third point, a fourth side extending from the second point toward the other side in the first direction, and a fifth side extending from the third point toward the other side in the second direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-157770 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional laminated coil components, a fixing portion is provided for the purpose of preventing the terminal electrodes from falling off (peeling off) from the element body. However, in conventional laminated coil components, the fixing portion and the coil are provided in close proximity to each other. Therefore, in conventional laminated coil components, stray capacitance (parasitic capacitance) may occur between the fixing portion and the coil. This may degrade the characteristics of the laminated coil component.

[0005] An object of one aspect of the present invention is to provide a laminated coil component that can suppress peeling of a terminal electrode from a body while suppressing deterioration of characteristics. [Means for solving the problem]

[0006] A coil component according to one aspect of the present invention comprises an element body having a mounting surface and an end face extending in a first direction perpendicular to the mounting surface, a coil disposed within the element body, and a terminal electrode having a second electrode portion extending in a second direction perpendicular to the end face along the mounting surface, wherein at least a portion of the second electrode portion of the terminal electrode is disposed within the element body, and the second electrode portion has a second protrusion protruding from an end of the second electrode portion in the second direction, and when viewed from a third direction perpendicular to the first and second directions, in the second electrode portion located within the element body, the distance in the second direction between a virtual line extending in a direction parallel to the end face from the end of the second protrusion in the second direction toward the mounting surface and the end of the second electrode portion is shorter than the distance between the second protrusion and the coil.

[0007] In one embodiment, the terminal electrode may have a first electrode portion extending in a first direction perpendicular to the mounting surface so as to follow the end face, and may be L-shaped when viewed from a third direction.

[0008] In one embodiment, at least a part of a first electrode portion of the terminal electrode is disposed within the element body, and the first electrode portion may have a first protrusion protruding in a first direction.

[0009] In one embodiment, in a first electrode portion located within the element body when viewed from the third direction, the element body may be present between the mounting surface and an imaginary line extending in a direction parallel to the mounting surface from the end of the first protrusion portion in the first direction toward the end face.

[0010] In one embodiment, the distance between the second protrusion and the coil may be the shortest distance between the second protrusion and the coil. Effect of the Invention

[0011] According to one aspect of the present invention, it is possible to suppress peeling of a terminal electrode from an element body while suppressing deterioration of characteristics. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a laminated coil component according to one embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of an element body of the laminated coil component. [Diagram 3] FIG. 3 is a diagram showing a cross-sectional configuration of the laminated coil component. [Figure 4] FIG. 4 is an exploded perspective view of an element body of a laminated coil component according to another embodiment. [Diagram 5] 5(a) and 5(b) are diagrams showing cross-sectional configurations of laminated coil components according to other embodiments. [Figure 6] 6(a) and 6(b) are diagrams showing cross-sectional configurations of laminated coil components according to other embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicated explanations will be omitted.

[0014] As shown in FIG. 1, the laminated coil component 1 includes an element body 2, and a first terminal electrode 4 and a second terminal electrode 5 arranged on both ends of the element body 2, respectively.

[0015] The element body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and ridges, and a rectangular parallelepiped shape with rounded corners and ridges. The element body 2 has, as its outer surfaces, a pair of end faces (first face, second face) 2a, 2b facing each other, a pair of main faces (first face, second face) 2c, 2d facing each other, and a pair of side faces 2e, 2f facing each other. The facing direction (parallel to the end faces 2a, 2b) in which the pair of main faces 2c, 2d face each other is the first direction D1. The facing direction (parallel to the main faces 2c, 2d) in which the pair of end faces 2a, 2b face each other is the second direction D2. The facing direction in which the pair of side faces 2e, 2f face each other is the third direction D3. In this embodiment, the first direction D1 is the height direction of the element body 2. The second direction D2 is the longitudinal direction of the element body 2 and is perpendicular to the first direction D1. The third direction D3 is the width direction of the element body 2 and is perpendicular to the first direction D1 and the second direction D2.

[0016] The pair of end faces 2a, 2b extend in a first direction D1 so as to connect the pair of principal faces 2c, 2d together. The pair of end faces 2a, 2b also extend in a third direction D3 (the short side direction of the pair of principal faces 2c, 2d). The pair of side faces 2e, 2f extend in the first direction D1 so as to connect the pair of principal faces 2c, 2d together. The pair of side faces 2e, 2f also extend in a second direction D2 (the long side direction of the pair of end faces 2a, 2b). In this embodiment, the principal face 2d is defined as a mounting face that faces another electronic device (for example, a circuit board or an electronic component) when the laminated coil component 1 is mounted on the other electronic device.

[0017] As shown in Fig. 2, the element body 2 is configured by stacking a plurality of dielectric layers (insulating layers) 6 in the direction in which a pair of side surfaces 2e, 2f face each other. In the element body 2, the stacking direction of the plurality of dielectric layers 6 (hereinafter simply referred to as the "stacking direction") coincides with the third direction D3. Each dielectric layer 6 is configured, for example, from a sintered body of a ceramic green sheet containing a dielectric material (dielectric ceramic such as BaTiO3-based, Ba(Ti,Zr)O3-based, or (Ba,Ca)TiO3-based). In the actual element body 2, each dielectric layer 6 is integrated to the extent that the boundaries between each dielectric layer 6 are not visible.

[0018] The first terminal electrode 4 is disposed on the end face 2a side of the element body 2, and the second terminal electrode 5 is disposed on the end face 2b side of the element body 2. That is, the first terminal electrode 4 and the second terminal electrode 5 are located apart from each other in the opposing direction of the pair of end faces 2a, 2b. The first terminal electrode 4 and the second terminal electrode 5 contain a conductive material (for example, Ag or Pd). The first terminal electrode 4 and the second terminal electrode 5 are formed as a sintered body of a conductive paste containing a conductive metal powder (for example, Ag powder or Pd powder). The first terminal electrode 4 and the second terminal electrode 5 are electroplated to form a plating layer on their surfaces. For example, Ni, Sn, etc. are used for the electroplating.

[0019] The first terminal electrode 4 is embedded in the element body 2. The first terminal electrode 4 is disposed across the end face 2a and the main surface 2d. In this embodiment, the surface of the first terminal electrode 4 is flush with both the end face 2a and the main surface 2d.

[0020] The first terminal electrode 4 has an L-shape when viewed from the third direction D3. The first terminal electrode 4 has a first electrode portion 4a and a second electrode portion 4b. The first electrode portion 4a and the second electrode portion 4b are connected at a ridge portion of the element body 2 and are electrically connected to each other. The first electrode portion 4a extends along the first direction D1. The first electrode portion 4a has a rectangular shape when viewed from the third direction D3. The second electrode portion 4b extends along the second direction D2. The second electrode portion 4b has a rectangular shape when viewed from the third direction D3. The first electrode portion 4a and the second electrode portion 4b extend along the third direction D3.

[0021] The first electrode portion 4a is provided with a first protrusion 4c. The first protrusion 4c protrudes from an end of the first electrode portion 4a on the principal surface 2c side toward the principal surface 2c. The first protrusion 4c is provided at a position on the end surface 2b side at the end of the first electrode portion 4a. The second electrode portion 4b is provided with a second protrusion 4d. The second protrusion 4d protrudes from an end of the second electrode portion 4b on the end surface 2b side toward the end surface 2b. The second protrusion 4d is provided at a position on the principal surface 2c side at the end of the second electrode portion 4b. Each of the first protrusion 4c and the second protrusion 4d has a curved tip.

[0022] As shown in FIG. 2, the first terminal electrode 4 is configured by laminating a plurality of electrode layers 10-15. Each of the electrode layers 10-15 is provided in a recess in the dielectric layer 6. The electrode layers 10-15 are formed by forming a recess in the dielectric layer 6, filling the recess with a conductive paste, and firing the same. Each of the electrode layers 10-15 is disposed on the dielectric layer 6. The dielectric layer 6 shown in FIG. 2 is configured by stacking a dielectric layer on which the electrode layers 10-15 are disposed, and a dielectric layer (pattern sheet) provided with a pattern corresponding to the shape of the electrode layers 10-15.

[0023] The electrode layer 10 has an L-shape when viewed from the third direction D3. The electrode layer 10 has a first portion 10a and a second portion 10b. The first portion 10a extends along the first direction D1. The second portion 10b extends along the second direction D2. The first portion 10a is provided with a protrusion 10c that protrudes from an end portion on the main surface 2c side toward the main surface 2c. The second portion 10b is provided with a protrusion 10d that protrudes from an end portion on the end surface 2b side toward the end surface 2b.

[0024] The electrode layers 11 to 15 have the same configuration as the electrode layer 10. The electrode layer 11 has a first portion 11a and a second portion 11b. The first portion 11a is provided with a protrusion 11c. The second portion 11b is provided with a protrusion 11d. The electrode layer 12 has a first portion 12a and a second portion 12b. The first portion 12a is provided with a protrusion 12c. The second portion 12b is provided with a protrusion 12d. The electrode layer 13 has a first portion 13a and a second portion 13b. The first portion 13a is provided with a protrusion 13c. The second portion 13b is provided with a protrusion 13d.

[0025] The electrode layer 14 has a first portion 14a and a second portion 14b. The first portion 14a is provided with a protrusion 14c. The second portion 14b is provided with a protrusion 14d. The electrode layer 15 has a first portion 15a and a second portion 15b. The first portion 15a is provided with a protrusion 15c. The second portion 15b is provided with a protrusion 15d.

[0026] The first electrode portion 4a of the first terminal electrode 4 is formed by stacking first portions 10a-15a of the electrode layers 10-15. The second electrode portion 4b of the first terminal electrode 4 is formed by stacking second portions 10b-15b of the electrode layers 10-15. The first protrusion 4c of the first terminal electrode 4 is formed by stacking protrusions 10c-15c of the electrode layers 10-15. The second protrusion 4d of the first terminal electrode 4 is formed by stacking protrusions 10d-15d of the electrode layers 10-15.

[0027] 3, the second terminal electrode 5 is embedded in the element body 2. The second terminal electrode 5 is disposed across the end face 2b and the main surface 2d. In this embodiment, the surface of the second terminal electrode 5 is flush with both the end face 2b and the main surface 2d.

[0028] The second terminal electrode 5 has an L-shape when viewed from the third direction D3. The second terminal electrode 5 has a first electrode portion 5a and a second electrode portion 5b. The first electrode portion 5a and the second electrode portion 5b are connected at a ridge portion of the element body 2 and are electrically connected to each other. The first electrode portion 5a extends along the first direction D1. The first electrode portion 5a has a rectangular shape when viewed from the third direction D3. The second electrode portion 5b extends along the second direction D2. The second electrode portion 5b has a rectangular shape when viewed from the third direction D3. The first electrode portion 5a and the second electrode portion 5b extend along the third direction D3.

[0029] The first electrode portion 5a is provided with a first protrusion 5c. The first protrusion 5c protrudes from an end of the first electrode portion 5a on the principal surface 2c side toward the principal surface 2c. The first protrusion 5c is provided at a position on the end surface 2a side at the end of the first electrode portion 5a. The second electrode portion 5b is provided with a second protrusion 5d. The second protrusion 5d protrudes from an end of the second electrode portion 5b on the end surface 2a side toward the end surface 2a. The second protrusion 5d is provided at a position on the principal surface 2c side at the end of the second electrode portion 5b. Each of the first protrusion 5c and the second protrusion 5d has a curved tip.

[0030] As shown in FIG. 2, the second terminal electrode 5 is configured by laminating a plurality of electrode layers 16-21. Each of the electrode layers 16-21 is provided in a recess in the dielectric layer 6. The electrode layers 16-21 are formed by forming a recess in the dielectric layer 6, filling the recess with a conductive paste, and firing the same. The electrode layers 16-21 are formed by the same method as the electrode layers 10-15. Each of the electrode layers 16-21 is disposed on the dielectric layer 6. The dielectric layer 6 shown in FIG. 2 is configured by overlapping a dielectric layer on which the electrode layers 16-21 are disposed, and a dielectric layer (pattern sheet) provided with a pattern corresponding to the shape of the electrode layers 16-21.

[0031] The electrode layer 16 has an L-shape when viewed from the third direction D3. The electrode layer 16 has a first portion 16a and a second portion 16b. The first portion 16a extends along the first direction D1. The second portion 16b extends along the second direction D2. The first portion 16a is provided with a protrusion 16c that protrudes from an end portion on the main surface 2c side toward the main surface 2c. The second portion 16b is provided with a protrusion 16d that protrudes from an end portion on the end surface 2a side toward the end surface 2a.

[0032] The electrode layers 17 to 21 have the same configuration as the electrode layer 16. The electrode layer 17 has a first portion 17a and a second portion 17b. The first portion 17a is provided with a protrusion 17c. The second portion 17b is provided with a protrusion 17d. The electrode layer 18 has a first portion 18a and a second portion 18b. The first portion 18a is provided with a protrusion 18c. The second portion 18b is provided with a protrusion 18d. The electrode layer 19 has a first portion 19a and a second portion 19b. The first portion 19a is provided with a protrusion 19c. The second portion 19b is provided with a protrusion 19d.

[0033] The electrode layer 20 has a first portion 20a and a second portion 20b. The first portion 20a is provided with a protrusion 20c. The second portion 20b is provided with a protrusion 20d. The electrode layer 21 has a first portion 21a and a second portion 21b. The first portion 21a is provided with the protrusion 21c. The second portion 21b is provided with the protrusion 21d.

[0034] The first electrode portion 5a of the second terminal electrode 5 is formed by stacking first portions 16a-21a of the electrode layers 16-21. The second electrode portion 5b of the second terminal electrode 5 is formed by stacking second portions 16b-21b of the electrode layers 16-21. The first protrusion 5c of the second terminal electrode 5 is formed by stacking protrusions 16c-21c of the electrode layers 16-21. The second protrusion 5d of the second terminal electrode 5 is formed by stacking protrusions 16d-21d of the electrode layers 16-21.

[0035] As shown in FIG. 2, the laminated coil component 1 includes a coil 7 disposed in an element body 2. The coil axis of the coil 7 extends along a third direction D3. As shown in FIG. 2, the coil 7 is configured by electrically connecting a first conductor 22, a second conductor 23, a third conductor 24, a fourth conductor 25, a fifth conductor 26, and a sixth conductor 27. Each of the conductors 22-27 has a predetermined thickness in the third direction D3. Each of the conductors 22-27 is made of a conductive material (for example, Ag or Pd). Each of the conductors 22-27 is configured as a sintered body of a conductive paste containing the conductive material. In this embodiment, each of the conductors 22-27 (coil 7) is formed of the same conductive material as the first terminal electrode 4 and the second terminal electrode 5. Each of the conductors 22-27, the electrode layers 10-15, and the electrode layers 16-21 are formed by co-firing. Each of the conductors 22-26 is disposed on a dielectric layer 6. The dielectric layer 6 shown in FIG. 2 is configured by stacking a dielectric layer in which the conductors 22-27 are arranged and a dielectric layer (pattern sheet) on which a pattern corresponding to the shape of the conductors 22-27 is provided.

[0036] One end of the coil 7 and the first terminal electrode 4 are electrically connected by a connection portion 27a. The other end of the coil 7 and the second terminal electrode 5 are electrically connected by a connection portion 22a. The connection portion 22a is formed integrally with the first conductor 22. The connection portion 27a is formed integrally with the sixth conductor 27.

[0037] 3, in the laminated coil component 1, the element body 2 exists between the principal surface 2d and a virtual line L1 extending in the second direction D2 from an end of the first protrusion 4c, which is the farthest position from the principal surface (mounting surface) 2d in the first electrode portion 4a of the first terminal electrode 4, toward the end surface 2a. That is, in the laminated coil component 1, the element body 2 exists between the first protrusion 4c and the end surface 2a. Also, in the laminated coil component 1, the element body 2 exists between the end surface 2a and a virtual line L2 extending in the first direction D1 from an end of the second protrusion 4d, which is the farthest position from the end surface 2a in the second electrode portion 4b of the first terminal electrode 4, toward the principal surface 2d. That is, in the laminated coil component 1, the element body 2 exists between the first protrusion 5c and the end surface 2b.

[0038] In the laminated coil component 1, the element body 2 exists between the principal surface 2d and a virtual line L3 extending in the second direction D2 from an end of the first protrusion 5c, which is the farthest position from the principal surface 2d in the first electrode portion 5a of the second terminal electrode 5, toward the end surface 2b. That is, in the laminated coil component 1, the element body 2 exists between the second protrusion 4d and the principal surface 2d. Also, in the laminated coil component 1, the element body 2 exists between the end surface 2b and a virtual line L4 extending in the first direction D1 from an end of the second protrusion 5d, which is the farthest position from the end surface 2b in the second electrode portion 5b of the second terminal electrode 5, toward the principal surface 2d. That is, in the laminated coil component 1, the element body 2 exists between the second protrusion 5d and the principal surface 2d.

[0039] As described above, in the laminated coil component 1 according to this embodiment, the element body 2 exists between the imaginary lines L1, L3 and the main surface 2d, which is the mounting surface. As a result, in the laminated coil component 1, even if a force toward the outside of the end faces 2a, 2b in the second direction D2 acts on the first terminal electrode 4 and the second terminal electrode 5, the element body 2 exists between the first protrusion 4c of the first electrode portion 4a and the end face 2a, and between the first electrode portion 5a and the first protrusion 5c, so that the element body 2 prevents the first electrode portions 4a, 5a from peeling off. Specifically, the first protrusion 4c and the first protrusion 5c are caught (locked) on the element body 2, so that the element body 2 prevents the first electrode portions 4a, 5a from peeling off. Therefore, in the laminated coil component 1, peeling of the first terminal electrode 4 and the second terminal electrode 5 from the element body 2 can be suppressed.

[0040] When the laminated coil component 1 is mounted on a circuit board or the like, the force applied to the element body 2 due to thermal shock tends to be greatest at the ends of the first electrode portions 4a, 5a located away from the main surface 2d, which is the mounting surface. This makes it easy for the first electrode portions 4a, 5a to peel off from the element body 2 in the laminated coil component 1. Therefore, when the main surface 2d of the element body 2 is the mounting surface, a configuration in which the element body 2 is present between the imaginary lines L1, L3 and the end faces 2a, 2b is particularly effective in suppressing peeling of the first electrode portions 4a, 5a.

[0041] Moreover, in the laminated coil component 1, the above-described configuration can suppress peeling of the first terminal electrode 4 and the second terminal electrode 5 from the element body 2. Therefore, the laminated coil component 1 does not need to be provided with a fixing portion as in the conventional laminated coil component. Therefore, the laminated coil component 1 can suppress the generation of stray capacitance between the coil 7. Therefore, the laminated coil component 1 can suppress the deterioration of characteristics.

[0042] In the laminated coil component 1 according to this embodiment, the first terminal electrode 4 and the second terminal electrode 5 have second electrode portions 4b, 5b, and the second electrode portions 4b, 5b are disposed within the element body 2. In the laminated coil component 1, the element body 2 is present between the end faces 2a, 2b and imaginary lines L2, L4 that extend in the first direction D1 toward the principal faces 2d from positions in the second direction D2 furthest from the end faces 2a, 2b in the second electrode portions 4b, 5b located within the element body 2. In this configuration, the element body 2 is present between the imaginary lines L2, L4 and the end faces 2a, 2b. As a result, in the laminated coil component 1, even if a force acts on the first terminal electrode 4 and the second terminal electrode 5 toward the outside of the main surface 2d in the first direction D1, the element body 2 is present between the second protrusion 4d of the second electrode portion 4b and the main surface 2d, and between the second protrusion 5d of the second electrode portion 5b and the main surface 2d, and therefore peeling of the second electrode portions 4b, 5b is prevented by the element body 2. Therefore, in the laminated coil component 1, peeling of the first terminal electrode 4 and the second terminal electrode 5 from the element body 2 can be further suppressed.

[0043] Although the embodiment of the present invention has been described above, the present invention is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.

[0044] In the above embodiment, the first electrode portion 4a of the first terminal electrode 4 is provided with the first protrusion 4c, and the second electrode portion 4b is provided with the second protrusion 4d. Similarly, the first electrode portion 5a of the second terminal electrode 5 is provided with the first protrusion 5c, and the second electrode portion 5b is provided with the second protrusion 5d. However, it is sufficient that the protrusions are provided on at least one of the first electrode portions 4a, 5a and the second electrode portions 4b, 5b. When the main surface 2d of the element body 2 is the mounting surface, it is preferable that the first electrode portions 4a, 5a are provided with protrusions.

[0045] In the above embodiment, the first terminal electrode 4 is embedded in the element body 2, and the surface of the first terminal electrode 4 is flush with the end face 2a and the main surface 2d. Similarly, the second terminal electrode 5 is embedded in the element body 2, and the surface of the second terminal electrode 5 is flush with the end face 2b and the main surface 2d. However, the shapes of the first terminal electrode 4 and the second terminal electrode 5 are not limited thereto. For example, the second electrode portion 4b of the first terminal electrode 4 and the second electrode portion 5b of the second terminal electrode 5 may be disposed on the main surface 2d. In this configuration, at least the first electrode portion of the first terminal electrode 4 is provided with the first protrusion 4c, and the first electrode portion 5a of the second terminal electrode 5 may be provided with the first protrusion 5c.

[0046] In the above embodiment, the coil 7 is disposed inside the element body 2, and the coil 7 is composed of the conductors 22 to 27. However, the configuration of the coil is not limited to this.

[0047] As shown in FIG. 4, for example, the coil 7A arranged in the element body 2A is configured by electrically connecting a first conductor 30, a second conductor 31, a third conductor 32, a fourth conductor 33, a fifth conductor 34, a sixth conductor 35, and a seventh conductor 36. The first terminal electrode 4 shown in FIG. 4 is configured to include an electrode layer 15A in addition to the electrode layers 10 to 15. The electrode layer 15A has a first portion 15Aa, a second portion 15Ab, a first protrusion 15Ac, and a second protrusion 15Ad. The second terminal electrode 5 is configured to include an electrode layer 21A in addition to the electrode layers 16 to 21. The electrode layer 21A has a first portion 21Aa, a second portion 21Ab, a first protrusion 21Ac, and a second protrusion 21Ad.

[0048] One end of the coil 7A and the first terminal electrode 4 are electrically connected by a connection portion 36a. The other end of the coil 7A and the second terminal electrode 5 are electrically connected by a connection portion 30a. The connection portion 30a is formed integrally with the first conductor 30. The connection portion 36a is formed integrally with the seventh conductor 36.

[0049] In the above embodiment, as a configuration in which the element body 2 is present between the virtual lines L1, L3 and the main surface 2d, a configuration in which the first electrode portion 4a of the first terminal electrode 4 is provided with the first protrusion 4c, and the first electrode portion 5a of the second terminal electrode 5 is provided with the first protrusion 5c has been described as an example. Also, as a configuration in which the element body 2 is present between the virtual lines L2, L4 and the end faces 2a, 2b, a configuration in which the second electrode portion 4b of the first terminal electrode 4 is provided with the second protrusion 4d, and the second electrode portion 5b of the second terminal electrode 5 is provided with the second protrusion 5d has been described as an example. However, the configuration in which the element body 2 is present between the virtual lines L1, L3 and the main surface 2d and between the virtual lines L2, L4 and the end faces 2a, 2b is not limited to this.

[0050] 5(a), the first protrusion 4Ac provided on the first electrode portion 4Aa of the first terminal electrode 4A and the second protrusion 4Ad provided on the second electrode portion 4Ab may have a shape tapered toward the tip. Similarly, the first protrusion 5Ac provided on the first electrode portion 5Aa of the second terminal electrode 5A and the second protrusion 5Ad provided on the second electrode portion 5Ab may have a shape tapered toward the tip.

[0051] 5(b), the first protrusion 4Bc provided on the first electrode portion 4Ba of the first terminal electrode 4B and the second protrusion 4Bd provided on the second electrode portion 4Bb may be sector-shaped. Similarly, the first protrusion 5Bc provided on the first electrode portion 5Ba of the second terminal electrode 5B and the second protrusion 5Bd provided on the second electrode portion 5Bb may be sector-shaped.

[0052] 6(a), the first terminal electrode 4C may have a recess 4Cc in the first electrode portion 4Ca and a recess 4Cd in the second electrode portion 4Cb. Similarly, the second terminal electrode 5C may have a recess 5Cc in the first electrode portion 5Ca and a recess 5Cd in the second electrode portion 5Cb.

[0053] 6(b), the first protrusion 4Dc provided on the first electrode portion 4Da of the first terminal electrode 4D may extend toward the main surface 2c. Similarly, the first protrusion 5Dc provided on the first electrode portion 5Da of the second terminal electrode 5D may extend toward the main surface 2c. The second protrusion 4Dd provided on the second electrode portion 4Db of the first terminal electrode 4D and the second protrusion 5Dd provided on the second electrode portion 5Db of the second terminal electrode 5 may extend toward the end faces 2a and 2b. [Explanation of symbols]

[0054] 1... Laminated coil component, 2... Element body, 2a, 2b... End surface (first surface, second surface), 2c, 2d... Main surface (first surface, second surface), 2e, 2f... Side surface, 4... First terminal electrode, 4a... First electrode part, 4b... Second electrode portion, 4c...first protrusion, 4d...second protrusion, 5...second terminal electrode, 5a...first electrode portion, 5b...second electrode portion, 5c...first protrusion, 5d...second protrusion, L1 to L4...imaginary line.

Claims

1. an element body having a mounting surface and an end surface extending in a first direction perpendicular to the mounting surface; A coil disposed within the body; a terminal electrode having a second electrode portion extending in a second direction perpendicular to the end surface so as to be aligned with the mounting surface, At least a part of the second electrode portion of the terminal electrode is disposed within the element body, the second electrode portion has a second protrusion protruding from an end of the second electrode portion in the second direction, a laminated coil component, wherein, when viewed from a third direction perpendicular to the first direction and the second direction, in the second electrode portion located within the element body, a distance in the second direction between a virtual line extending from an end of the second protrusion in the second direction toward the mounting surface in a direction parallel to the end face and the end of the second electrode portion is shorter than a distance between the second protrusion and the coil.

2. 2. The laminated coil component according to claim 1, wherein the terminal electrode has a first electrode portion extending in the first direction perpendicular to the mounting surface so as to follow the end surface, and has an L-shape when viewed from the third direction.

3. At least a part of the first electrode portion of the terminal electrode is disposed within the element body, The laminated coil component according to claim 2 , wherein the first electrode portion has a first protrusion protruding in the first direction.

4. 4. The laminated coil component according to claim 3, wherein, in the first electrode portion located within the element body when viewed from the third direction, the element body is present between the mounting surface and an imaginary line extending in a direction parallel to the mounting surface from an end of the first protrusion in the first direction toward the end face.

5. 5. The laminated coil component according to claim 1, wherein a distance between the second protrusion and the coil is a shortest distance between the second protrusion and the coil.

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