Laminated coil component

Abstract

In the laminated coil component, in the third direction, a pair of connection portions are interposed between each of the pair of end portions of the coil conductor and the pair of terminal electrodes. Since the connection portion has an extension portion extending from an overlapping portion overlapping the end portion of the coil conductor, the contact area with the terminal electrode can be enlarged, and high connection reliability between the coil conductor and the terminal electrode can be achieved. Furthermore, since the contour of the elongated portion of the connection portion on the first wiring portion side is inclined in the same direction as the inclined portion of the first wiring portion of the coil conductor, the connectivity between the coil conductor and the terminal electrode is improved while the first wiring portion and the connection portion are separated.

Description

Technical Field

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

[0002] As an existing laminated coil component, there is known a component described in Japanese Patent Publication No. 2015-141945 (Patent Document 1). The laminated coil component described in Patent Document 1 includes: a body having a mounting surface and a main surface facing each other in a stacking direction, a coil conductor arranged in the body, and a pair of terminal electrodes arranged on the mounting surface of the body. The coil conductor includes a wiring portion arranged on the main surface side, a wiring portion arranged on the mounting surface side, and a column portion extending in the stacking direction and connecting the wiring portions on the main surface side and the mounting surface side to each other, and includes a pair of end portions extending along the stacking direction toward the mounting surface. Summary of the invention

[0003] Technical problem to be solved by the invention

[0004] In the existing laminated coil component, since the end of the coil conductor is directly connected to the terminal electrode, when an external force is applied to the terminal electrode, if stress is applied to the portion connecting the end of the coil conductor and the terminal electrode, the connection is considered to become unstable. As a result, it is considered that the characteristics of the laminated coil component are degraded or the laminated coil component does not function.

[0005] According to one aspect of the present invention, there is provided a laminated coil component that achieves improved connectivity between a coil conductor and a terminal electrode.

[0006] Technical solutions for solving technical problems

[0007] In a stacked coil component according to one aspect of the present disclosure, there is provided: a body, which is composed of a plurality of stacked insulating layers and has a mounting surface intersecting with a stacking direction; a coil conductor, which is arranged in the body and has a pair of end portions extending toward the mounting surface along the stacking direction; a pair of terminal electrodes, which are arranged on the mounting surface of the body and are electrically connected to a pair of end portions of the coil conductor, respectively, and are opposite to each other in a first direction on the mounting surface; a pair of connecting portions, which are respectively interposed between the pair of end portions of the coil conductor and the pair of terminal electrodes, and the coil conductor includes: a first wiring portion, which extends parallel to the mounting surface; a second wiring portion, which extends parallel to the mounting surface on a side farther from the mounting surface than the first wiring portion; a column portion, which extends along The first wiring portion extends in the stacking direction and connects the first wiring portion and the second wiring portion, the first wiring portion includes an inclined portion, and when viewed from the stacking direction, the inclined portion extends in a direction inclined relative to the first direction, and is adjacent to the connecting portion in a second direction orthogonal to the stacking direction and the first direction, the connecting portion has an overlapping portion overlapping with the end of the coil conductor when viewed from the stacking direction, and an elongated portion extending inward from the overlapping portion along the first direction, and when viewed from the stacking direction, in terms of the length in the second direction orthogonal to the stacking direction and the first direction, the base end of the elongated portion on the overlapping portion side is longer than the front end, and at least a portion of the contour of the elongated portion on the first wiring portion side is inclined in the same direction as the inclined portion of the first wiring portion.

[0008] In the stacked coil component, a pair of connecting portions are respectively interposed between a pair of ends of the coil conductor and a pair of terminal electrodes in the stacking direction. The connecting portion has an elongated portion extending from an overlapping portion overlapping with the end of the coil conductor, and compared with a case where the end of the coil conductor is directly connected to the terminal electrode, an enlarged contact area with the terminal electrode can be achieved. Since at least a portion of the contour of the first wiring portion side of the elongated portion of the connecting portion is inclined in the same direction as the inclined portion of the first wiring portion of the coil conductor, the connectivity between the coil conductor and the terminal electrode is improved while the separation of the first wiring portion and the connecting portion is achieved.

[0009] In the laminated coil component according to another aspect, all contours of the extension portion on the first wiring portion side are inclined in the same direction as the inclined portion of the first wiring portion when viewed in the lamination direction.

[0010] In the laminated coil component according to another aspect, the contour of the extension portion on the first wiring portion side is inclined so as to be parallel to the inclined portion of the first wiring portion when viewed in the lamination direction.

[0011] In the laminated coil component according to another aspect, the shapes of the pair of connecting portions are symmetrical.

[0012] In the laminated coil component according to another aspect, the shapes of the pair of connecting portions have an asymmetrical relationship.

[0013] In the laminated coil component according to another aspect, the area of ​​the end portion of the coil conductor is larger than the area of ​​the column portion when viewed in the lamination direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a perspective view of a laminated coil component according to an embodiment.

[0015] Figure 2 Yes means Figure 1 1 is an exploded perspective view of the structure of each layer of the laminated coil component shown.

[0016] Figure 3 yes Figure 1 A side view of a laminated coil component is shown.

[0017] Figure 4 yes Figure 1 An end view of the laminated coil component is shown.

[0018] Figure 5 This is a diagram showing the coil conductor and a pair of connecting portions as viewed from the stacking direction.

[0019] Figure 6 It means Figure 5 Diagrams of different types of coil conductors and a pair of connecting parts.

[0020] Figure 7 It means Figure 5 Diagrams of different types of connections. DETAILED DESCRIPTION

[0021] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and repeated descriptions are omitted.

[0022] Reference Figure 1 , a laminated coil component according to this embodiment is described. Figure 1 FIG. 1 is a perspective view of a laminated coil component according to an embodiment. Figure 1 As shown, the laminated coil component 1 includes an element body 2 , a pair of terminal electrodes 3 , 4 , and a coil conductor 5 .

[0023] The element body 2 is in the shape of a rectangular parallelepiped. The rectangular parallelepiped shape includes the shape of a rectangular parallelepiped with chamfered corners and ridges, and the shape of a rectangular parallelepiped with rounded corners and ridges. The element body 2 has a pair of end faces 2a, 2b, a pair of main faces 2c, 2d, and a pair of side faces 2e, 2f as outer surfaces. The end faces 2a, 2b are opposite to each other. The main faces 2c, 2d are opposite to each other. The side faces 2e, 2f are opposite to each other. Hereinafter, the relative direction of the end faces 2a, 2b is set as the first direction D1, the relative direction of the side faces 2e, 2f is set as the second direction D2, and the relative direction of the main faces 2c, 2d is set as the third direction D3. The first direction D1, the third direction D3, and the second direction D2 are substantially orthogonal to each other.

[0024] The end faces 2a and 2b extend in the third direction D3 so as to connect the main faces 2c and 2d. The end faces 2a and 2b also extend in the second direction D2 so as to connect the side faces 2e and 2f. The main faces 2c and 2d extend in the first direction D1 so as to connect the end faces 2a and 2b. The main faces 2c and 2d also extend in the second direction D2 so as to connect the side faces 2e and 2f. The side faces 2e and 2f extend in the first direction D1 so as to connect the end faces 2a and 2b. The side faces 2e and 2f also extend in the third direction D3 so as to connect the main faces 2c and 2d.

[0025] The main surface 2d is a mounting surface, for example, a surface facing other electronic devices (such as a circuit substrate or a laminated electronic component) when the laminated coil component 1 is mounted on other electronic devices (not shown). The end surfaces 2a and 2b are surfaces continuous from the mounting surface (i.e., the main surface 2d).

[0026] The length of the element body 2 in the first direction D1 is longer than the length of the element body 2 in the third direction D3 and the length of the element body 2 in the second direction D2. The length of the element body 2 in the third direction D3 is shorter than the length of the element body 2 in the second direction D2. That is, in this embodiment, the end faces 2a, 2b, the main faces 2c, 2d, and the side faces 2e, 2f are rectangular. The length of the element body 2 in the third direction D3 may be equal to the length of the element body 2 in the second direction D2, or may be longer than the length of the element body 2 in the second direction D2.

[0027] In this embodiment, “equal” may include values ​​that include a slight difference or manufacturing error within a predetermined range, etc. For example, if multiple values ​​are within a range of ±5% of the average value of the multiple values, the multiple values ​​are equal.

[0028] like Figure 2As shown, the element body 2 has a structure in which a plurality of element body layers are stacked in the third direction D3. In this embodiment, the element body 2 is composed of eight element body layers 21 to 28. That is, the stacking direction of the element body 2 is consistent with the third direction D3. In the actual element body 2, the plurality of element body layers 21 to 28 may be integrated to the extent that the boundaries between the layers cannot be identified, or may be integrated to the extent that the boundaries between the layers can be identified.

[0029] Each element layer 21 to 28 is mainly composed of a resin material. The resin material includes, for example, at least one selected from a liquid crystal polymer, a polyimide resin, a crystalline polystyrene, an epoxy resin, an acrylic resin, a bismaleimide resin, and a fluorine resin. The resin material may or may not contain a filler. The filler is, for example, an inorganic filler. As an inorganic filler, for example, silica can be cited.

[0030] like Figure 2 As shown, among the element layers 21 to 28, the element layer 21 constituting the main surface 2c is composed only of a resin material. The wiring portions 6, 7, 8a to 8e constituting the coil conductor 5 are embedded in the element layers 22 to 27. More specifically, a plurality of second wiring portions 6 are embedded in the element layer 22, wiring portions 8a to 8d constituting the column portion 8 described later are embedded in the element layers 23 to 26, respectively, and a wiring portion 8e constituting a plurality of first wiring portions 7 and the column portion 8 is embedded in the element layer 27. A pair of connecting portions 9 and 10 described later are embedded in the element layer 28 constituting the main surface 2d.

[0031] In addition, each element layer 21 to 28 may also be composed of a magnetic material. The magnetic material includes, for example, a Ni-Cu-Zn ferrite material, a Ni-Cu-Zn-Mg ferrite material, or a Ni-Cu ferrite material. The magnetic material may also include, for example, an Fe alloy. Each element layer 21 to 28 may contain a non-magnetic material, which may also be a glass ceramic material or a dielectric material.

[0032] A pair of terminal electrodes 3, 4 is composed of a first terminal electrode 3 and a second terminal electrode 4. Each terminal electrode 3, 4 is provided on the element body 2. Each terminal electrode 3, 4 is arranged on the main surface 2d of the element body 2. A pair of terminal electrodes 3, 4 is provided on the element body 2 separated from each other in the first direction D1. Specifically, the first terminal electrode 3 is arranged on the end surface 2a side of the element body 2, and the second terminal electrode 4 is arranged on the end surface 2b side of the element body 2.

[0033] When viewed from the third direction D3, a pair of terminal electrodes 3 and 4 both have a rectangular shape. A pair of terminal electrodes 3 and 4 have the same size. Each terminal electrode 3 and 4 is arranged in such a way that each side of the rectangle is along the first direction D1 or the second direction D2. Each terminal electrode 3 and 4 protrudes beyond the main surface 2d. That is, in the present embodiment, the surface of each terminal electrode 3 and 4 is not coplanar with the main surface 2d. A pair of terminal electrodes 3 and 4 are both made of a conductive material (such as Cu). A pair of terminal electrodes 3 and 4 may also be buried in the element body 2. At this time, a pair of terminal electrodes 3 and 4 may be arranged roughly coplanar with the main surface 2d, or may protrude partially from the main surface 2d.

[0034] Electrolytic plating or electroless plating may be performed to provide a plating layer (not shown) containing Ni, Sn, Au, etc. on each terminal electrode 3, 4. The plating layer may include, for example, a Ni plating film containing Ni and covering the terminal electrodes 3, 4 and an Au plating film containing Au and covering the Ni plating film.

[0035] The coil conductor 5 is arranged in the element body 2. The coil conductor 5 has a plurality of second wiring portions 6, a plurality of first wiring portions 7, and a plurality of pillars 8. The coil conductor 5 is formed by electrically connecting the second wiring portions 6, the first wiring portions 7, and the pillars 8. The coil axis of the coil conductor 5 is set along the second direction D2. The plurality of second wiring portions 6, the plurality of first wiring portions 7, and the plurality of pillars 8 are made of a conductive material (e.g., Cu). The second wiring portions 6, the first wiring portions 7, and the pillars 8 are arranged separately from the end faces 2a, 2b, the main faces 2c, 2d, and the side faces 2e, 2f.

[0036] The second wiring portions 6 are respectively arranged on the main surface 2c side of the element body 2. The second wiring portions 6 extend along the first direction D1. The second wiring portions 6 are respectively connected to the two pillars 8. The second wiring portion 6 is mounted on the two pillars 8. One end portion of the second wiring portion 6 in the extension direction (the end portion on the end surface 2a side) is connected to one end portion of the pillar 8 (the end portion on the main surface 2c side). The other end portion of the second wiring portion 6 in the extension direction (the end portion on the end surface 2b side) is connected to one end portion of the pillar 8.

[0037] The first wiring parts 7 are respectively arranged on the main surface 2d (mounting surface) side of the element body 2. The first wiring parts 7 extend in the first direction D1. The first wiring parts 7 are respectively connected to the two pillars 8. The first wiring part 7 is mounted on the two pillars 8. One end of the first wiring part 7 in the extension direction (the end on the end face 2a side) is connected to the other end of the pillar 8 (the end on the main surface 2d side). The other end of the first wiring part 7 in the extension direction (the end on the end face 2b side) is connected to the other end of the pillar 8. The number of the plurality of first wiring parts 7 is one less than the number of the plurality of second wiring parts 6. That is, when the number of the second wiring parts 6 is n, the number of the first wiring parts 7 is n-1. In the present embodiment, there are 5 second wiring parts 6 and 4 first wiring parts 7.

[0038] Each first wiring section 7 is composed of an inclined portion 7a as a whole. When viewed from the third direction D3, the inclined portion 7a is inclined at a predetermined angle θ relative to the first direction D1. The inclination angle θ of the inclined portion 7a relative to the first direction D1 is the same in all the first wiring sections 7. That is, the plurality of first wiring sections 7 are parallel to each other. Since the first wiring section 7 is composed of the inclined portion 7a as a whole, there is no step or bend in the shape of the first wiring section 7, and it is close to a straight line. Therefore, the resistance when the current flows through the first wiring section 7 is suppressed to be low.

[0039] The column 8 is respectively arranged on the end face 2a side and the end face 2b side of the element body 2. The column 8 extends along the third direction D3. In the present embodiment, the cross-sectional shape of the column 8 in the cross section orthogonal to the third direction D3 is approximately rectangular (specifically, approximately square). The cross-sectional shape of the column 8 may also be, for example, a circular shape, an elliptical shape, or a polygon other than a quadrilateral. The column 8 connects the second wiring portion 6 and the first wiring portion 7. One end of the column 8 is connected to one end and the other end of the second wiring portion 6. The other end of the column 8 is connected to one end and the other end of the first wiring portion 7. Among the plurality of column portions 8, one end of the column 8 close to the side 2f is connected to one end of the second wiring portion 6 and constitutes the end 5a of the coil conductor 5, and one end of the column 8 close to the side 2e is connected to the other end of the second wiring portion 6 and constitutes the end 5b of the coil conductor 5. The column 8 close to the side 2f and the column 8 close to the side 2e can both be as follows. Figure 1 , 2 Although the adjacent pillars 8 are designed to be spaced approximately equally from each other as shown, they may be designed to be spaced unequally from each other (at least some of the pillars may have different intervals from each other).

[0040] A pair of connection parts 9 and 10 are provided in the element body 2 between the pair of end parts 5a and 5b of the coil conductor 5 and the pair of terminal electrodes 3 and 4. The pair of connection parts 9 and 10 are composed of a first connection part 9 and a second connection part 10.

[0041] The first connection portion 9 electrically connects the first terminal electrode 3 and the end portion 5a of the coil conductor 5. The first connection portion 9 is electrically connected to the other end portion of the column portion 8 of the coil conductor 5. The first connection portion 9 is made of a conductive material (for example, Cu). Figure 5As shown, when viewed from the third direction D3, the first connecting portion 9 has an overlapping portion 31 and an extension portion 32. The overlapping portion 31 is a portion that overlaps with the end portion 5a of the coil conductor 5. In the present embodiment, the overlapping portion 31 is substantially rectangular, and each side is arranged along the first direction D1 and the second direction D2. The extension portion 32 is a portion that extends inwardly from the overlapping portion 31 along the first direction D1. The extension portion 32 is substantially trapezoidal in shape and tapers inwardly, and the width of the front end 32b corresponding to the upper base of the trapezoid is narrower than the width of the base end 32a corresponding to the lower base of the trapezoid (that is, the length related to the second direction D2). In the present embodiment, the contour of the extension portion 32 on the first wiring portion 7 side is all in the same direction as the inclined portion 7a of the first wiring portion 7 (in the second direction D2). Figure 5 In addition, in the present embodiment, the entire contour of the extension portion 32 on the first wiring portion 7 side is inclined in a manner parallel to the inclined portion 7a of the first wiring portion 7. In addition, the contour of the side surface 2f side of the extension portion 32 extends parallel to the first direction D1 from the base end 32a to the front end 32b. The end of the side surface 2f side of the first connecting portion 9 may also be consistent with the end of the side surface 2f side of the first terminal electrode 3. The end of the end face 2a side of the first connecting portion 9 may also be consistent with the end of the end face 2a side of the first terminal electrode 3.

[0042] The second connection portion 10 electrically connects the first terminal electrode 3 and the end portion 5b of the coil conductor 5. The second connection portion 10 is electrically connected to the other end portion of the column portion 8 of the coil conductor 5. The second connection portion 10 is made of a conductive material (for example, Cu). Figure 5 As shown, the shape of the second connection portion 10 is symmetrical with the shape of the first connection portion 9. Specifically, the shape of the second connection portion 10 is point-symmetrical with the shape of the first connection portion 9 about the center O of the main surface 2d (mounting surface). In this way, when the shape of the first connection portion 9 is symmetrical with the shape of the second connection portion 10, the characteristic deviation of the laminated coil component 1 can be suppressed.

[0043] The second connection portion 10 is the same as the first connection portion 9, and has an overlapping portion 31 and an extended portion 32 when viewed from the third direction D3. The overlapping portion 31 of the second connection portion 10 is a portion that overlaps with the end portion 5b of the coil conductor 5, and the extended portion 32 of the second connection portion 10 is a portion that extends inward from the overlapping portion 31 along the first direction D1. The second connection portion 10 is the same as the first connection portion 9, and the contour of the extended portion 32 on the first wiring portion 7 side is all oriented in the same direction as the inclined portion 7a of the first wiring portion 7 (at Figure 5It is inclined (the middle is in the direction of descending to the right). Additionally, in the present embodiment, the entire contour on the side of the first wiring portion 7 of the extending portion 32 is inclined in a manner parallel to the inclined portion 7a of the first wiring portion 7. Further, the contour on the side surface 2e side of the extending portion 32 extends parallel to the first direction D1 from the base end 32a to the front end 32b. The end portion on the side surface 2e side of the second connecting portion 10 may also coincide with the end portion on the side surface 2e side of the second terminal electrode 4. The end portion on the end surface 2b side of the second connecting portion 10 may also coincide with the end portion on the end surface 2b side of the second terminal electrode 4.

[0044] Regarding the dimensions of the pair of connecting portions 9 and 10, as Figure 3 shown, the length C1 of the first connecting portion 9 in the first direction D1 is longer than the length P1 of the column portion 8 connected to the first connecting portion 9 in the first direction D1, and is equal to or less than the length E1 of each of the first terminal electrodes 3 in the first direction D1 (P1 < C1 ≤ E1). In the present embodiment, the length C1 of the first connecting portion 9 in the first direction D1 is longer than the length P1 of the column portion 8 connected to the first connecting portion 9 in the first direction D1, and is the same as the length E1 of each of the first terminal electrodes 3 in the first direction D1 (P1 < C1 = E1). The length C1 of the second connecting portion 10 in the first direction D1 is longer than the length P1 of the column portion 8 connected to the second connecting portion 10 in the first direction D1, and is equal to or less than the length E1 of each of the second terminal electrodes 4 in the first direction D1 (P1 < C1 ≤ E1). In the present embodiment, the length C1 of the second connecting portion 10 in the first direction D1 is longer than the length P1 of the column portion 8 connected to the second connecting portion 10 in the first direction D1, and is the same as the length E1 of each of the second terminal electrodes 4 in the first direction D1 (P1 < C1 = E1). As Figure 4As shown, the length C2 of the first connecting portion 9 in the second direction D2 is equal to or greater than the length P2 of the column portion 8 connected to the first connecting portion 9 in the second direction D2 (C2≥P2). The length C2 of the second connecting portion 10 in the second direction D2 is equal to or greater than the length P2 of the column portion 8 connected to the second connecting portion 10 in the second direction D2 (C2≥P2). In the present embodiment, the length P3 of the column portion 8A of the pair of end portions 5a, 5b constituting the coil conductor 5 in the second direction D2 is designed to be equal to the length P2 of the other column portions 8 in the second direction D2 (P3 = P2). However, the length P3 of the column portion 8A in the second direction D2 may be designed to be longer than the length P2 of the other column portions 8 in the second direction D2 (P3>P2), or may be designed to be shorter (P3<P2). Thus, the characteristics (electrical characteristics, magnetic characteristics, etc.) of the coil can be appropriately adjusted. In addition, the length of the wiring portion 8e of the end portion 5a (or 5b) constituting the coil conductor 5 in the second direction D2 may be equal to the length of the other wiring portions 8a to 8d constituting the column portion 8A (or 8B), or may be longer than the length of the other wiring portions 8a to 8d in the second direction D2. The length of the end portion 5a (or 5b) of the coil conductor 5 in the second direction D2 may also be equal to the length C2 of the connecting portion 9 (or connecting portion 10) in the second direction D2.

[0045] As described above, in the stacked coil component 1 of the present embodiment, with respect to the third direction D3, a pair of connecting portions 9, 10 are respectively interposed between the pair of end portions 5a, 5b of the coil conductor 5 and the pair of terminal electrodes 3, 4. In addition to the overlapping portions 31 that overlap with the end portions 5a, 5b of the coil conductor 5, the connecting portions 9, 10 have extending portions 32 that extend from the overlapping portions 31. When viewed from the third direction D3, the area of the connecting portions 9, 10 is larger than the area of the end portions 5a, 5b of the coil conductor 5. Therefore, compared with the case where the end portions 5a, 5b of the coil conductor 5 are directly connected to the terminal electrodes 3, 4 without interposing the connecting portions 9, 10, an increase in the contact area with the terminal electrodes 3, 4 can be achieved. Thus, high connection reliability between the coil conductor 5 and the terminal electrodes 3, 4 is achieved.

[0046] Moreover, in the stacked coil component 1 of the present embodiment, the contour of the extending portion 32 of the connecting portions 9, 10 on the side of the first wiring portion 7 is inclined in the same direction as the inclined portion 7a of the first wiring portion 7 of the coil conductor 5. In this case, separation between the first wiring portion 7 and the connecting portions 9, 10 can be achieved, and at the same time, the extending portions 32 of the connecting portions 9, 10 can be brought close to the vicinity of the first wiring portion 7, achieving an increase in the area of the connecting portions 9, 10 (that is, an increase in the contact area with the terminal electrodes 3, 4).

[0047] As in the laminated coil component 1 of the present embodiment, when the contour of the extension portion 32 of the connecting portions 9 and 10 on the first wiring portion 7 side is parallel to the inclined portion 7a of the first wiring portion 7, the first wiring portion 7 and the connecting portions 9 and 10 can be separated, and the extension portion 32 of the connecting portions 9 and 10 can be made closer to the first wiring portion 7, thereby achieving a further expansion of the area of ​​the connecting portions 9 and 10 (i.e., a further expansion of the contact area with the terminal electrodes 3 and 4).

[0048] The present disclosure is not necessarily limited to the above-described embodiments, and various modifications may be made without departing from the spirit and scope of the present disclosure.

[0049] For example, the coil conductor 5 and the connecting parts 9 and 10 are not limited to the above-mentioned shapes, and can be changed as appropriate. Figure 6 In the manner shown, the first wiring portion 7 of the coil conductor 5 also has a pair of non-inclined portions 7b located on both sides of the inclined portion 7a. Each non-inclined portion 7b extends parallel to the first direction D1. One non-inclined portion 7b, as viewed from the third direction D3, includes an area overlapping with the corresponding column portion 8, and is located close to the end surface 2a. The other non-inclined portion 7b, as viewed from the third direction D3, includes an area overlapping with the corresponding column portion 8, and is located close to the end surface 2b. The inclined portion 7a connects a pair of non-inclined portions 7b, and is inclined only at a specified angle θ relative to the first direction D1 as viewed from the third direction D3. The inclination angle θ of the inclined portion 7a relative to the first direction D1 is the same in all the first wiring portions 7. That is, the plurality of first wiring portions 7 have a mutually parallel relationship in the inclined portion 7a. Even if Figure 6 The method shown can also separate the first wiring section 7 from the connecting sections 9 and 10, while making the extension section 32 of the connecting sections 9 and 10 close to the first wiring section 7, thereby expanding the area of ​​the connecting sections 9 and 10 (i.e., expanding the contact area with the terminal electrodes 3 and 4). Figure 6 In the illustrated embodiment, in particular, the extension portion 32 in the region adjacent to the non-inclined portion 7b in the second direction D2 can be brought close to the vicinity of the non-inclined portion 7b, thereby achieving an increase in the area of ​​the connection portions 9 and 10.

[0050] In addition, the shapes of the pair of connecting parts 9 and 10 are not limited to those having a symmetrical relationship, and may also be those having an asymmetrical relationship. Figure 7 As shown, the lengths of the first connection portion 9 and the second connection portion 10 in the first direction D1 may be different, and the length of the second connection portion 10 may be shorter than the length of the first connection portion 9. In this way, by making the shapes of the pair of connection portions 9 and 10 asymmetrical, for example, when performing a quality inspection (traceability) of the component, the polarity of the coil conductor 5 can be determined based on the shapes of the connection portions 9 and 10.

[0051] Moreover, each connection part 9, 10 is not limited to a single-layer structure, but may also be a multi-layer structure. That is, each connection part 9, 10 may also be composed of a plurality of layers overlapping in the third direction D3. In this case, the layers constituting the connection parts 9, 10 may be of the same shape when observed from the third direction D3. They may also be of different shapes. In the case where the layers constituting the connection parts 9, 10 are of different shapes when observed from the third direction D3, the area of ​​the layer in contact with the terminal electrodes 3, 4 is the largest, and the area of ​​the layer away from the terminal electrodes 3, 4 may also be smaller. At this time, the three-dimensional shape of each connection part 9, 10 may be a pyramid or a step.

Claims

1. A laminated coil component, wherein: have: A body composed of a plurality of stacked insulating layers and having a mounting surface intersecting with a stacking direction; A coil conductor, which is disposed in the element body and has a pair of end portions extending toward the mounting surface along the stacking direction; a pair of terminal electrodes, which are provided on the mounting surface of the element body, are electrically connected to a pair of end portions of the coil conductor, respectively, and are opposite to each other in a first direction on the mounting surface; a pair of connecting portions, each of which is interposed between a pair of end portions of the coil conductor and the pair of terminal electrodes, The coil conductor includes: a first wiring portion extending parallel to the mounting surface; a second wiring portion extending parallel to the mounting surface on a side farther from the mounting surface than the first wiring portion; and a column portion extending along the stacking direction and connecting the first wiring portion and the second wiring portion. The first wiring portion includes an inclined portion, the inclined portion extending in a direction inclined relative to the first direction when viewed in the stacking direction, and adjacent to the connection portion in a second direction orthogonal to the stacking direction and the first direction, The connecting portion includes an overlapping portion overlapping with an end portion of the coil conductor when viewed from the stacking direction, and an extended portion extending inwardly from the overlapping portion along the first direction. When viewed from the stacking direction, the base end of the extension portion on the overlapping portion side is longer than the front end in terms of the length in the second direction, and at least a portion of the contour of the extension portion on the first wiring portion side is inclined in the same direction as the inclined portion of the first wiring portion.

2. The laminated coil component according to claim 1, wherein: When viewed in the stacking direction, all contours of the extension portion on the first wiring portion side are inclined in the same direction as the inclined portion of the first wiring portion.

3. The laminated coil component according to claim 1 or 2, wherein: When viewed from the stacking direction, the contour of the extension portion on the first wiring portion side is inclined so as to be parallel to the inclined portion of the first wiring portion.

4. The laminated coil component according to any one of claims 1 to 3, wherein The shapes of the pair of connection portions have a symmetrical relationship.

5. The laminated coil component according to any one of claims 1 to 3, wherein The shapes of the pair of connection portions have an asymmetrical relationship.

6. The laminated coil component according to any one of claims 1 to 5, wherein When viewed in the stacking direction, an area of ​​the end portion of the coil conductor is larger than an area of ​​the column portion.

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