Laminated coil components

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 multilayer coil component.

Background Art

[0002] As a conventional multilayer coil component, for example, the one described in Patent Document 1 is known. The multilayer 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 external conductor layer provided at a first point where the first side and the second side intersect. In the multilayer coil component described in Patent Document 1, in the external conductor layer, a position farthest from the first point in one side in the second direction in a portion farthest from the first point in one side in the first direction is defined as a second point, and in the external conductor layer, a position farthest from the first point in one side in the first direction in a portion farthest from the first point in one side in the second direction is defined as a third point. The external conductor layer has a fixing portion located within a region having 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

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional multilayer coil component, a fixing portion is provided for the purpose of suppressing the terminal electrode from falling off (peeling) from the element body. However, in a conventional multilayer coil component, the fixing portion and the coil are provided in proximity to each other. Therefore, in a conventional multilayer coil component, a stray capacitance (parasitic capacitance) may occur between the fixing portion and the coil. As a result, the characteristics of the multilayer coil component may deteriorate.

[0005] One aspect of the present invention aims to provide a laminated coil component that can suppress the peeling of terminal electrodes from the base material while suppressing the deterioration of its characteristics. [Means for solving the problem]

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

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

[0008] In one embodiment, at least a portion of the first electrode portion of the terminal electrode is located inside the substrate, and the first electrode portion may have a first projection that protrudes in a first direction.

[0009] In one embodiment, when viewed from a third direction, in the first electrode portion located within the element, the element may exist between a virtual line extending in a direction parallel to the mounting surface from the end of the first projection in the first direction toward the end face, and the mounting surface.

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

[0011] According to one aspect of the present invention, it is possible to suppress the peeling of terminal electrodes from the substrate while suppressing the deterioration of characteristics. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a perspective view of a laminated coil component according to one embodiment. [Figure 2] Figure 2 is an exploded perspective view of the basic structure of a multilayer coil component. [Figure 3] Figure 3 shows the cross-sectional configuration of a laminated coil component. [Figure 4] Figure 4 is an exploded perspective view of the basic structure of a laminated coil component according to another embodiment. [Figure 5] Figures 5(a) and 5(b) show the cross-sectional configuration of a laminated coil component according to another embodiment. [Figure 6] Figures 6(a) and 6(b) show the cross-sectional configuration of a laminated coil component according to another embodiment. [Modes for carrying out the invention]

[0013] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant descriptions will be omitted.

[0014] As shown in Figure 1, the laminated coil component 1 comprises a base body 2 and a first terminal electrode 4 and a second terminal electrode 5, which are respectively located at both ends of the base body 2.

[0015] 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 as its outer surface a pair of opposing end faces (first face, second face) 2a, 2b, a pair of opposing main faces (first face, second face) 2c, 2d, and a pair of opposing side faces 2e, 2f. The opposing direction of the pair of main faces 2c, 2d (parallel to the end faces 2a, 2b) is the first direction D1. The opposing direction of the pair of end faces 2a, 2b (parallel to the main faces 2c, 2d) is the second direction D2. The opposing direction of the pair of side faces 2e, 2f is the third direction D3. In this embodiment, the first direction D1 is the height direction of Body 2. The second direction D2 is the longitudinal direction of the base body 2 and is perpendicular to the first direction D1. The third direction D3 is the width direction of the base body 2 and is perpendicular to both the first direction D1 and the second direction D2.

[0016] A pair of end faces 2a and 2b extend in a first direction D1 to connect a pair of main faces 2c and 2d. The pair of end faces 2a and 2b also extend in a third direction D3 (the direction of the shorter sides of the pair of main faces 2c and 2d). A pair of side faces 2e and 2f extend in a first direction D1 to connect a pair of main faces 2c and 2d. The pair of side faces 2e and 2f also extend in a second direction D2 (the direction of the longer sides of the pair of end faces 2a and 2b). In this embodiment, the main face 2d is defined as the mounting surface that faces other electronic devices (e.g., circuit boards or electronic components) when mounting the laminated coil component 1 onto other electronic devices.

[0017] As shown in Figure 2, the base body 2 is constructed by stacking multiple dielectric layers (insulating layers) 6 in a direction in which a pair of side surfaces 2e and 2f face each other. In the base body 2, the stacking direction of the multiple dielectric layers 6 (hereinafter simply referred to as the "stacking direction") coincides with the third direction D3. Each dielectric layer 6 is made of a sintered ceramic green sheet containing a dielectric material (such as a dielectric ceramic such as BaTiO3, Ba(Ti,Zr)O3, or (Ba,Ca)TiO3). In the actual base body 2, each dielectric layer 6 is integrated to such an 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 spaced apart from each other in the facing direction of the pair of end faces 2a and 2b. The first terminal electrode 4 and the second terminal electrode 5 contain a conductive material (for example, Ag or Pd, etc.). The first terminal electrode 4 and the second terminal electrode 5 are configured as sintered bodies of a conductive paste containing conductive metal powder (for example, Ag powder or Pd powder, etc.). The first terminal electrode 4 and the second terminal electrode 5 are subjected to electroplating, and a plating layer is formed on their surfaces. For electroplating, for example, Ni, Sn, etc. are used.

[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 face 2d. In the present embodiment, the surface of the first terminal electrode 4 is flush with each of the end face 2a and the main face 2d.

[0020] The first terminal electrode 4呈 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 the ridge line 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呈 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呈 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 the end portion on the main surface 2c side of the first electrode portion 4a toward the main surface 2c. The first protrusion 4c is provided at a position on the end face 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 the end portion on the end face 2b side of the second electrode portion 4b toward the end face 2b. The second protrusion 4d is provided at a position on the main 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 shape with a curved tip.

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

[0023] When viewed from the third direction D3, the electrode layer 10 has an L shape. 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 the 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 the end portion on the end face 2b side toward the end face 2b.

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

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

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

[0027] As shown in Figure 3, the second terminal electrode 5 is embedded in the base body 2. The second terminal electrode 5 is positioned across the end face 2b and the main face 2d. In this embodiment, the surface of the second terminal electrode 5 is flush with the end face 2b and the main face 2d, respectively.

[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 the edge of the element 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 projection 5c. The first projection 5c protrudes toward the main surface 2c from the end of the first electrode portion 5a on the main surface 2c side. The first projection 5c is located at the end of the first electrode portion 5a on the end surface 2a side. The second electrode portion 5b is provided with a second projection 5d. The second projection 5d protrudes toward the end surface 2a from the end of the second electrode portion 5b on the end surface 2a side. The second projection 5d is located at the end of the second electrode portion 5b on the main surface 2c side. Both the first projection 5c and the second projection 5d have a curved tip.

[0030] As shown in Figure 2, the second terminal electrode 5 is composed of multiple electrode layers 16 to 21 stacked on top of each other. Each of the electrode layers 16 to 21 is provided in a recess of the dielectric layer 6. The electrode layers 16 to 21 are formed by creating recesses in the dielectric layer 6, filling the recesses with conductive paste, and firing. The electrode layers 16 to 21 are formed in the same manner as the electrode layers 10 to 15. Each of the electrode layers 16 to 21 is placed on the dielectric layer 6. Note that the dielectric layer 6 shown in Figure 2 is composed of a dielectric layer on which the electrode layers 16 to 21 are placed and a dielectric layer (pattern sheet) on which a pattern corresponding to the shape of the electrode layers 16 to 21 is provided.

[0031] The electrode layer 16 has an L-shape when viewed from a 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 projection 16c that protrudes toward the main surface 2c from the end on the main surface 2c side. The second portion 16b is provided with a projection 16d that protrudes toward the end surface 2a from the end on the end surface 2a side.

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

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

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

[0035] As shown in Figure 2, the laminated coil component 1 has a coil 7 arranged within a base body 2. The coil axis of the coil 7 extends along a third direction D3. As shown in Figure 2, the coil 7 is constructed 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 conductor 22-27 has a predetermined thickness in the third direction D3. Each conductor 22-27 is made of a conductive material (e.g., Ag or Pd). Each conductor 22-27 is constructed as a sintered body of a conductive paste containing the above conductive material. In this embodiment, each conductor 22-27 (coil 7) is made of the same conductive material as the first terminal electrode 4 and the second terminal electrode 5. Each conductor 22-27 and the electrode layers 10-15 and 16-21 are formed by co-firing. Each of the conductors 22-26 is placed on a dielectric layer 6. The dielectric layer 6 shown in Figure 2 is constructed by stacking a dielectric layer on which each of the conductors 22 to 27 is arranged, and a dielectric layer (pattern sheet) on which a pattern corresponding to the shape of each of the conductors 22 to 27 is provided.

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

[0037] As shown in Figure 3, in the laminated coil component 1, a base body 2 exists between the main surface (mounting surface) 2d and a virtual line L1 extending in the second direction D2 toward the end surface 2a from the end of the first projection 4c, which is the position furthest from the main surface (mounting surface) 2d in the first electrode portion 4a of the first terminal electrode 4. In other words, in the laminated coil component 1, a base body 2 exists between the first projection 4c and the end surface 2a. Furthermore, in the laminated coil component 1, a base body 2 exists between the end surface 2a and a virtual line L2 extending in the first direction D1 toward the main surface 2d from the end of the second projection 4d, which is the position furthest from the end surface 2a in the second electrode portion 4b of the first terminal electrode 4. In other words, in the laminated coil component 1, a base body 2 exists between the first projection 5c and the end surface 2b.

[0038] In the laminated coil component 1, a base body 2 exists between the main surface 2d and a virtual line L3 extending in the second direction D2 toward the end surface 2b from the end of the first projection 5c, which is the position furthest from the main surface 2d at the first electrode portion 5a of the second terminal electrode 5. In other words, in the laminated coil component 1, a base body 2 exists between the second projection 4d and the main surface 2d. Furthermore, in the laminated coil component 1, a base body 2 exists between the end of the main surface 2b and a virtual line L4 extending in the first direction D1 toward the main surface 2d from the end of the second projection 5d, which is the position furthest from the end surface 2b at the second electrode portion 5b of the second terminal electrode 5. In other words, a base body 2 exists between the second projection 5d and the main surface 2d.

[0039] As explained above, in the laminated coil component 1 according to this embodiment, a base body 2 exists between the virtual 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 is applied to the first terminal electrode 4 and the second terminal electrode 5 in the second direction D2 toward the outward direction of the end faces 2a, 2b, the base body 2 exists between the first projection 4c of the first electrode portion 4a and the end face 2a, and between the first electrode portion 5a and the first projection 5c, so the peeling of the first electrode portions 4a and 5a is prevented by the base body 2. Specifically, the first projections 4c and 5c are caught (locked) on the base body 2, so the peeling of the first electrode portions 4a and 5a is prevented by the base body 2. Therefore, in the laminated coil component 1, the peeling of the first terminal electrode 4 and the second terminal electrode 5 from the base 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 base body 2 due to thermal shock tends to act most strongly on the ends of the first electrode portions 4a and 5a, which are located away from the main surface 2d, which is the mounting surface. As a result, the laminated coil component 1 is prone to delamination of the first electrode portions 4a and 5a from the base body 2. Therefore, when the main surface 2d of the base body 2 is the mounting surface, a configuration in which the base body 2 is located between virtual lines L1 and L3 and the end faces 2a and 2b is particularly effective in suppressing delamination of the first electrode portions 4a and 5a.

[0041] Furthermore, the above configuration in the laminated coil component 1 suppresses the separation of the first terminal electrode 4 and the second terminal electrode 5 from the base body 2. Therefore, the laminated coil component 1 does not require a fixing part as in conventional designs. Consequently, the laminated coil component 1 can suppress the generation of stray capacitance between it and the coil 7. Therefore, the laminated coil component 1 can suppress a decrease in performance.

[0042] In the laminated coil component 1 according to this embodiment, the first terminal electrode 4 and the second terminal electrode 5 each have second electrode portions 4b and 5b, and the second electrode portions 4b and 5b are arranged within the base body 2. In the laminated coil component 1, the base body 2 exists between the virtual lines L2 and L4, which extend in the first direction D1 toward the main surface 2d from the position furthest from the end faces 2a and 2b in the second electrode portions 4b and 5b located within the base body 2 in the second direction D2, and the end faces 2a and 2b. In this configuration, the base body 2 exists between the virtual lines L2 and L4 and the end faces 2a and 2b. As a result, in the laminated coil component 1, even if a force acting outward from the main surface 2d in the first direction D1 acts on the first terminal electrode 4 and the second terminal electrode 5, the base body 2 is present between the second projection 4d of the second electrode portion 4b and the main surface 2d, and between the second projection 5d of the second electrode portion 5b and the main surface 2d. Therefore, the peeling of the second electrode portions 4b and 5b is prevented by the base body 2. Consequently, in the laminated coil component 1, the peeling of the first terminal electrode 4 and the second terminal electrode 5 from the base body 2 can be further suppressed.

[0043] 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.

[0044] In the above embodiment, a configuration in which a first projection 4c is provided on the first electrode portion 4a of the first terminal electrode 4 and a second projection 4d is provided on the second electrode portion 4b was described as an example. Similarly, a configuration in which a first projection 5c is provided on the first electrode portion 5a of the second terminal electrode 5 and a second projection 5d is provided on the second electrode portion 5b was described as an example. However, the projection only needs to be 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 base body 2 is the mounting surface, it is preferable that the projections are provided on the first electrode portions 4a, 5a.

[0045] In the above embodiment, a configuration in which the first terminal electrode 4 is embedded in the base body 2 and the surface of the first terminal electrode 4 is flush with the end face 2a and the main surface 2d was described as an example. Similarly, a configuration in which the second terminal electrode 5 is embedded in the base body 2 and the surface of the second terminal electrode 5 is flush with the end face 2b and the main surface 2d was described as an example. However, the shapes of the first terminal electrode 4 and the second terminal electrode 5 are not limited to this. 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 arranged on the main surface 2d. In this configuration, at least the first electrode portion of the first terminal electrode 4 is provided with a first projection 4c, and the first electrode portion 5a of the second terminal electrode 5 may also be provided with a first projection 5c.

[0046] In the above embodiment, a coil 7 is arranged within the base body 2, and a configuration in which the coil 7 is composed of conductors 22 to 27 was described as an example. However, the configuration of the coil is not limited to this.

[0047] As shown in Figure 4, for example, the coil 7A located within the element 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 Figure 4 is configured by including electrode layer 15A in addition to electrode layers 10-15. Electrode layer 15A has a first portion 15Aa, a second portion 15Ab, a first projection 15Ac, and a second projection 15Ad. The second terminal electrode 5 is configured by including electrode layer 21A in addition to electrode layers 16-21. Electrode layer 21A has a first portion 21Aa, a second portion 21Ab, a first projection 21Ac, and a second projection 21Ad.

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

[0049] In the above embodiment, as an example of a configuration in which the elemental body 2 exists between the virtual lines L1, L3 and the main surface 2d, a first projection 4c is provided on the first electrode portion 4a of the first terminal electrode 4 and a first projection 5c is provided on the first electrode portion 5a of the second terminal electrode 5 was described. Furthermore, as an example of a configuration in which the elemental body 2 exists between the virtual lines L2, L4 and the end faces 2a, 2b, a second projection 4d is provided on the second electrode portion 4b of the first terminal electrode 4 and a second projection 5d is provided on the second electrode portion 5b of the second terminal electrode 5 was described. However, the configuration in which the elemental body 2 exists 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 these.

[0050] As shown in Figure 5(a), the first projection 4Ac provided on the first electrode portion 4Aa of the first terminal electrode 4A and the second projection 4Ad provided on the second electrode portion 4Ab may have a shape that tapers towards the tip. Similarly, the first projection 5Ac provided on the first electrode portion 5Aa of the second terminal electrode 5A and the second projection 5Ad provided on the second electrode portion 5Ab may have a shape that tapers towards the tip.

[0051] As shown in Figure 5(b), the first projection 4Bc provided on the first electrode portion 4Ba of the first terminal electrode 4B and the second projection 4Bd provided on the second electrode portion 4Bb may be fan-shaped. Similarly, the first projection 5Bc provided on the first electrode portion 5Ba of the second terminal electrode 5B and the second projection 5Bd provided on the second electrode portion 5Bb may be fan-shaped.

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

[0053] As shown in Figure 6(b), the first projection 4Dc provided on the first electrode portion 4Da of the first terminal electrode 4D may extend toward the main surface 2c. Similarly, the first projection 5Dc provided on the first electrode portion 5Da of the second terminal electrode 5D may extend toward the main surface 2c. Furthermore, the second projection 4Dd provided on the second electrode portion 4Db of the first terminal electrode 4D and the second projection 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. A base body having a mounting surface and an end face extending in a first direction perpendicular to the mounting surface, A coil arranged within the aforementioned body, The device comprises a terminal electrode having a second electrode portion that extends in a second direction perpendicular to the end face so as to be aligned with the mounting surface, At least a portion of the second electrode portion of the terminal electrode is arranged within the substrate, The second electrode portion is provided with a second projection that protrudes from the end of the second electrode portion in the second direction. A laminated coil component in which, when viewed from a third direction perpendicular to the first and second directions, the distance in the second direction between the imaginary line extending from the end of the second projection 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 the shortest distance between the second projection and the coil.

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

3. At least a portion of the first electrode portion of the terminal electrode is arranged within the substrate, The laminated coil component according to claim 2, wherein the first electrode portion is provided with a first projection that protrudes in the first direction.

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

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