Laminated coil components

Abstract

To provide a laminated coil component that can improve reliability. [Solution] In the laminated coil component, the connecting conductor connects the connecting portion that constitutes one end and the other end of the coil, and has one end that is close to the end face and the other end that is away from the end face in the first direction. The length of the connecting conductor in the first direction is longer than the length of the connecting portion that is connected to the connecting conductor in the first direction, and is less than or equal to the length of the terminal electrode in the first direction. The length of the connecting conductor in the first direction is less than or equal to the length of the connecting conductor in the first direction, and is longer than the length of the connecting portion in the first direction. When viewed from a third direction, the connecting conductor is connected to the connecting conductor at a position closer to one end.

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 a body having a pair of end faces facing each other in a first direction, a mounting surface and a main surface facing each other in a second direction, and a pair of side faces facing each other in a third direction, a coil disposed within the body, and a pair of terminal electrodes disposed on the mounting surface of the body. The coil includes a first wiring portion disposed on the main surface side, a second wiring portion disposed on the mounting surface side, and a connecting portion that extends in the second direction and connects the first wiring portion and the second wiring portion.

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, the connecting portion has a constant width (length) over the entire length in the extending direction. In this configuration, in the conventional multilayer coil component, the end of the connecting portion constituting the coil is connected to the terminal electrode. In the conventional multilayer coil component, for example, when an external force is applied to the terminal electrode, stress is applied to the connection portion between the end of the connecting portion and the terminal electrode, and there is a risk that the terminal electrode and the connecting portion are disconnected. As a result, the connection between the terminal electrode and the coil (connecting portion) becomes unstable, or the electrical connection between the terminal electrode and the coil is interrupted. As a result, the characteristics of the multilayer coil component deteriorate, or the multilayer coil component stops functioning.

[0005] One aspect of the present invention aims to provide a laminated coil component that can improve reliability. [Means for solving the problem]

[0006] A laminated coil component according to one aspect of the present invention comprises a base body having a pair of end faces facing each other in a first direction, a mounting surface and a main surface facing each other in a second direction, and a pair of side surfaces facing each other in a third direction; a pair of terminal electrodes arranged spaced apart in the first direction on the mounting surface of the base body; a coil disposed within the base body and electrically connected to the pair of terminal electrodes, comprising a first wiring section located on the main surface side, a second wiring section located on the mounting surface side, and a connecting section extending in the second direction and connecting the first wiring section and the second wiring section, wherein the coil axis is provided along the third direction; and each of the one end and the other end of the coil and each of the pair of terminal electrodes are electrically connected. The device comprises a connecting conductor that is electrically connected, and a connecting conductor positioned in the same location as the second wiring section in a second direction between the connecting conductor and the connecting portions that constitute one end and the other end of the coil, respectively. The connecting conductor connects the connecting portions that constitute one end and the other end of the coil to the connecting conductor, and has one end closer to the end face and the other end further away from the end face in a first direction. The length of the connecting conductor in the first direction is longer than the length of the connecting portion connected to the connecting conductor in the first direction, and less than or equal to the length of the terminal electrode in the first direction. The length of the connecting conductor in the first direction is less than or equal to the length of the connecting conductor in the first direction, and longer than the length of the connecting portion in the first direction. When viewed from a third direction, the connecting conductor is connected to the connecting conductor at a position closer to one end.

[0007] In one embodiment, each of the multiple second wiring sections has a first portion that extends in the first direction and is located near one end face, and includes a region that overlaps with the corresponding connection section when viewed from the second direction; a second portion that extends in the first direction and is located near the other end face, and includes a region that overlaps with the corresponding connection section; and a third portion that connects the first portion and the second portion and is inclined with respect to the first direction. The lengths of the first portion and the second portion in the first direction may be longer than the length of the connecting conductor in the first direction. The second wiring section and the connecting conductor are arranged in a continuous position in the second direction. In this configuration, the lengths of the first portion and the second portion that extend in the first direction are longer than the length of the connecting conductor in the first direction. In this configuration, proximity between the connecting conductor and the third portion can be avoided in the second direction, so that a short circuit between the connecting conductor and the third portion can be suppressed. Therefore, the reliability of the laminated coil component can be improved.

[0008] In one embodiment, a connecting conductor is provided between the connecting conductor and the connection portion electrically connected to the connecting conductor, positioned at the same location as the second wiring portion in a second direction. The length of the connecting conductor in the first direction may be less than or equal to the length of the connecting conductor in the first direction, and greater than or equal to the length of the connection portion in the first direction. In this configuration, the length of the connecting conductor can be set within the range of the length of the connecting conductor and the length of the connection portion. This allows for a larger contact area between the connecting conductor and the connecting conductor in the laminated coil component. As a result, the bonding strength between the connecting conductor and the connecting conductor can be improved in the laminated coil component. This suppresses the occurrence of wire breakage between the connecting conductor and the connecting conductor. Consequently, the reliability of the laminated coil component can be improved.

[0009] In one embodiment, the length of the connecting conductor in the third direction may be greater than or equal to the length of the connection portion in the third direction. In this configuration, the contact area between the terminal electrode and the connecting conductor can be further increased. [Effects of the Invention]

[0010] According to one aspect of the present invention, reliability can be improved. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a perspective view of a laminated coil component according to one embodiment. [Figure 2] Figure 2 is a side view of a laminated coil component. [Figure 3] Figure 3 is a side view of a laminated coil component. [Figure 4] Figure 4 shows a view of a multilayer coil component from the mounting side. [Figure 5] Figure 5 is an end view of a laminated coil component. [Modes for carrying out the invention]

[0012] 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.

[0013] The laminated coil component according to this embodiment will be described with reference to Figure 1. Figure 1 is a perspective view of a laminated coil component according to one embodiment. As shown in Figure 1, the laminated coil component 1 comprises a base body 2, a first terminal electrode 3 and a second terminal electrode 4, a coil 5, a first connecting conductor 9 (see Figure 2) and a second connecting conductor 10, a first connecting conductor 11 (see Figures 3 and 5) and a second connecting conductor 12. In Figure 1, for the sake of explanation, the base body 2 is shown with a dashed line and the coil 5 is shown as transparent. In Figures 2 to 5, for the sake of explanation, the base body 2 is also shown with a dashed line, the coil 5 is shown as transparent, and the first terminal electrode 3 and second terminal electrode 4 are shown with dashed lines.

[0014] Body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped with chamfered corners and edges, and a rectangular parallelepiped with rounded corners and edges. 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 its outer surfaces. The end faces 2a, 2b face each other. The main faces 2c, 2d face each other. The side faces 2e, 2f face each other. Hereafter, the opposing direction of the end faces 2a, 2b will be referred to as the first direction D1, the opposing direction of the main faces 2c, 2d as the second direction D2, and the opposing direction of the side faces 2e, 2f as the third direction D3. The first direction D1, the second direction D2, and the third direction D3 are approximately orthogonal to each other.

[0015] The end faces 2a and 2b extend in the second direction D2 to connect the main faces 2c and 2d. The end faces 2a and 2b also extend in the third direction D3 to connect the side faces 2e and 2f. The main faces 2c and 2d extend in the first direction D1 to connect the end faces 2a and 2b. The main faces 2c and 2d also extend in the third direction D3 to connect the side faces 2e and 2f. The side faces 2e and 2f extend in the first direction D1 to connect the end faces 2a and 2b. The side faces 2e and 2f also extend in the second direction D2 to connect the main faces 2c and 2d.

[0016] The main surface 2d is the mounting surface, and is the surface that faces other electronic devices (e.g., circuit boards or multilayer electronic components) when mounting the multilayer coil component 1 to other electronic devices (not shown). The end surfaces 2a and 2b are surfaces that are continuous with the mounting surface (i.e., the main surface 2d).

[0017] The length of the base body 2 in the first direction D1 is longer than the length of the base body 2 in the second direction D2 and the length of the base body 2 in the third direction D3. The length of the base body 2 in the second direction D2 is shorter than the length of the base body 2 in the third direction D3. That is, in this embodiment, the end faces 2a, 2b, main faces 2c, 2d and side faces 2e, 2f are rectangular in shape. The length of the base body 2 in the second direction D2 may be equal to the length of the base body 2 in the third direction D3, or it may be longer than the length of the base body 2 in the third direction D3.

[0018] In addition, in this embodiment, "equivalent" may include, in addition to being equal, a slight difference or manufacturing error within a preset range. For example, if a plurality of values are within the range of ±5% of the average value of the plurality of values, the plurality of values are defined as equivalent.

[0019] The element body 2 is formed by laminating a plurality of element body layers (not shown) in the second direction D2. That is, the lamination direction of the element body 2 is the second direction D2. In the actual element body 2, the plurality of element body layers may be integrated to such an extent that the boundary between the layers is not visible, or may be integrated so that the boundary between the layers is visible.

[0020] The element body layer is a resin layer. The material of the element body layer includes, for example, at least one selected from liquid crystal polymer, polyimide resin, crystalline polystyrene, epoxy resin, acrylic resin, bismaleimide resin, and fluororesin. The element body layer contains a filler. The filler is, for example, an inorganic filler. Examples of the inorganic filler include silica. Note that the element body layer may not contain a filler.

[0021] In addition, the element body layer may be configured to contain a magnetic material. The magnetic material of the element body layer includes, for example, a Ni-Cu-Zn-based ferrite material, a Ni-Cu-Zn-Mg-based ferrite material, or a Ni-Cu-based ferrite material. The magnetic material of the element body layer may include, for example, an Fe alloy. The element body layer may include, for example, a non-magnetic material. The non-magnetic material of the element body layer includes, for example, a glass ceramic material or a dielectric material.

[0022] Each of the first terminal electrode 3 and the second terminal electrode 4 is provided on the element body 2. Each of the first terminal electrode 3 and the second terminal electrode 4 is disposed on the main surface 2d of the element body 2. The first terminal electrode 3 and the second terminal electrode 4 are provided on the element body 2 so as to be separated from each other in the first direction D1. Specifically, the first terminal electrode 3 is disposed on the end face 2a side of the element body 2. The second terminal electrode 4 is disposed on the end face 2b side of the element body 2.

[0023] The first terminal electrode 3 and the second terminal electrode 4 are each rectangular in shape. The first terminal electrode 3 and the second terminal electrode 4 are the same size (dimensions). Each of the first terminal electrode 3 and the second terminal electrode 4 is positioned so that each side is aligned with the first direction D1 or the third direction D3. The first terminal electrode 3 and the second terminal electrode 4 protrude beyond the main surface 2d. That is, in this embodiment, the surfaces of the first terminal electrode 3 and the second terminal electrode 4 are not flush with the main surface 2d. The first terminal electrode 3 and the second terminal electrode 4 are made of a conductive material (for example, Cu).

[0024] Each of the first terminal electrode 3 and the second terminal electrode 4 may be provided with a plating layer (not shown) containing, for example, Ni, Sn, or Au, by electroplating or electroless plating. The plating layer may have, for example, a Ni plating film containing Ni that covers the first terminal electrode 3 and the second terminal electrode 4, and an Au plating film containing Au that covers the Ni plating film.

[0025] The coil 5 is located inside the base body 2. The coil 5 has a plurality of first wiring sections 6, a plurality of second wiring sections 7, and a plurality of pillar sections (connecting sections) 8. The coil 5 is constructed by electrically connecting the first wiring sections 6, the second wiring sections 7, and the pillar sections 8. The coil axis of the coil 5 is provided along a third direction D3. The plurality of first wiring sections 6, the plurality of second wiring sections 7, and the plurality of pillar sections 8 are made of a conductive material (for example, Cu). The first wiring sections 6, the second wiring sections 7, and the pillar sections 8 are spaced apart from the end faces 2a, 2b, the main faces 2c, 2d, and the side faces 2e, 2f.

[0026] Each of the first wiring sections 6 is positioned on the main surface 2c side of the base body 2. Each of the first wiring sections 6 extends along the first direction D1. Each of the first wiring sections 6 connects two pillar sections 8. The first wiring section 6 spans across the two pillar sections 8. One end of the first wiring section 6 in the direction of extension (the end on the end surface 2a side) is connected to one end of the pillar section 8 (the end on the main surface 2c side). The other end of the first wiring section 6 in the direction of extension (the end on the end surface 2b side) is connected to one end of the pillar section 8.

[0027] Each of the second wiring sections 7 is located on the main surface 2d (mounting surface) side of the base body 2. Each of the second wiring sections 7 extends in the first direction D1. Each of the second wiring sections 7 connects two pillar sections 8. The second wiring section 7 spans across the two pillar sections 8. One end of the second wiring section 7 in the direction of extension (the end on the end face 2a side) is connected to the other end of the pillar section 8 (the end on the main surface 2d side). The other end of the second wiring section 7 in the direction of extension (the end on the end face 2b side) is connected to the other end of the pillar section 8. The number of multiple second wiring sections 7 is one less than the number of multiple first wiring sections 6. That is, if there are n first wiring sections 6, there will be n-1 second wiring sections 7.

[0028] The second wiring section 7 has a first section 7a, a second section 7b, and a third section 7c. The first section 7a, when viewed from the second direction D2, includes a region that overlaps with the corresponding pillar section 8 and is located closer to the end face 2a. The first section 7a extends in the first direction D1. The second section 7b, when viewed from the second direction D2, includes a region that overlaps with the corresponding pillar section 8 and is located closer to the end face 2b. The second section 7b extends in the first direction D1. The third section 7c connects the first section 7a and the second section 7b. The third section 7c is inclined with respect to the first direction D1 when viewed from the second direction D2.

[0029] Each of the pillar sections 8 is positioned on the end face 2a side and the end face 2b side of the base body 2, respectively. Each of the pillar sections 8 extends along the second direction D2. The pillar sections 8 connect the first wiring section 6 and the second wiring section 7. One end of the pillar section 8 is connected to one end and the other end of the first wiring section 6. The other end of the pillar section 8 is connected to one end and the other end of the second wiring section 7. One of the multiple pillar sections 8 has one end connected to one end of the first wiring section 6 and the other end connected to the first connecting conductor 11. One of the multiple pillar sections 8 has one end connected to the other end of the first wiring section 6 and the other end connected to the second connecting conductor 12.

[0030] The first connecting conductor 9 electrically connects the first terminal electrode 3 to one end of the coil 5. The first connecting conductor 9 is electrically connected to the other end of the pillar portion 8 of the coil 5. The first connecting conductor 9 is made of a conductive material (for example, Cu). The first connecting conductor 9 has a rectangular parallelepiped shape. When viewed from the second direction D2, the first connecting conductor 9 is positioned such that its long side aligns with the first direction D1 and its short side aligns with the third direction D3. The end of the first connecting conductor 9 on the side 2e coincides with the end of the first terminal electrode 3 on the side 2e. The end of the first connecting conductor 9 on the end face 2a coincides with the end of the first terminal electrode 3 on the end face 2a.

[0031] The second connecting conductor 10 electrically connects the second terminal electrode 4 to the other end of the coil 5. The second connecting conductor 10 is electrically connected to the other end of the pillar portion 8 of the coil 5. The second connecting conductor 10 is made of a conductive material (for example, Cu). The second connecting conductor 10 has a rectangular parallelepiped shape. When viewed from the second direction D2, the second connecting conductor 10 is positioned such that its long side aligns with the first direction D1 and its short side aligns with the third direction D3. The end of the second connecting conductor 10 on the side 2f coincides with the end of the second terminal electrode 4 on the side 2f. The end of the second connecting conductor 10 on the end face 2b coincides with the end of the second terminal electrode 4 on the end face 2b.

[0032] The first connecting conductor 11 connects the first connection conductor 9 and the other end of the pillar portion 8 of the coil 5. The first connecting conductor 11 is disposed between the first connection conductor 9 and the pillar portion 8. The first connecting conductor 11 is disposed at the same position as the second wiring portion 7 in the second direction D2. The first connecting conductor 11 is made of a conductive material (for example, Cu). The first connecting conductor 11 has a rectangular parallelepiped shape. The first connecting conductor 11 is arranged such that, when viewed from the second direction D2, the long side extends along the first direction D1 and the short side extends along the third direction D3. The end on the side surface 2e side of the first connecting conductor 11 coincides with the end on the side surface 2e side of the first connection conductor 9. The end on the end surface 2a side of the first connecting conductor 11 coincides with the end on the end surface 2a side of the first connection conductor 9.

[0033] The second connecting conductor 12 connects the second connection conductor 10 and the other end of the pillar portion 8 of the coil 5. The second connecting conductor 12 is disposed between the second connection conductor 10 and the pillar portion 8. The second connecting conductor 12 is disposed at the same position as the second wiring portion 7 in the second direction D2. The second connecting conductor 12 is made of a conductive material (for example, Cu). The second connecting conductor 12 has a rectangular parallelepiped shape. The second connecting conductor 12 is arranged such that, when viewed from the second direction D2, the long side extends along the first direction D1 and the short side extends along the third direction D3. The end on the side surface 2f side of the second connecting conductor 12 coincides with the end on the side surface 2f side of the second connection conductor 10. The end on the end surface 2b side of the second connecting conductor 12 coincides with the end on the end surface 2b side of the second connection conductor 10.

[0034] Next, the dimensions of each part of the multilayer coil component 1 will be described. As shown in FIG. 2, FIG. 3, or FIG. 4, the length C1 of the first connection conductor 9 in the first direction D1 is longer than the length P1 of the pillar portion 8 in the first direction D1 connected to the first connection conductor 9, and is not more 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 connection conductor 9 in the first direction D1 is longer than the length P1 of the pillar portion 8 in the first direction D1 connected to the first connection conductor 9, and is the same as the length E1 of each of the first terminal electrodes 3 in the first direction D1 (P1 < C1 = E1).

[0035] The length C1 of the second connection conductor 10 in the first direction D1 is longer than the length P1 of the pillar portion 8 connected to the second connection conductor 10 in the first direction D1, and is not more 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 connection conductor 10 in the first direction D1 is longer than the length P1 of the pillar portion 8 connected to the second connection conductor 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).

[0036] As shown in FIG. 3, the length C11 of the first connection conductor 11 in the first direction D1 is not more than the length C1 of the first connection conductor 9 in the first direction D1, and is not less than the length P1 of the pillar portion 8 in the first direction D1 (P1 ≤ C11 ≤ C1). In the present embodiment, the length C11 of the first connection conductor 11 in the first direction D1 is the same as the length C1 of the first connection conductor 9 in the first direction D1, and is longer than the length P1 of the pillar portion 8 in the first direction D1 (P1 < C11 = C1).

[0037] As shown in FIG. 2, the length C11 of the second connection conductor 12 in the first direction D1 is not more than the length C1 of the second connection conductor 10 in the first direction D1, and is not less than the length P1 of the pillar portion 8 in the first direction D1 (P1 ≤ C11 ≤ C1). In the present embodiment, the length C11 of the second connection conductor 12 in the first direction D1 is the same as the length C1 of the second connection conductor 10 in the first direction D1, and is longer than the length P1 of the pillar portion 8 in the first direction D1 (P1 < C11 = C1).

[0038] As shown in FIGS. 4 and 5, the length C2 of the first connection conductor 9 in the third direction D3 is not less than the length P2 of the pillar portion 8 connected to the first connection conductor 9 in the third direction D3 (C2 ≥ P2). The length C2 of the second connection conductor 10 in the third direction D3 is not less than the length P2 of the pillar portion 8 connected to the second connection conductor 10 in the third direction D3 (C2 ≥ P2).

[0039] As shown in FIG. 5, the length C22 of the first connecting conductor 11 in the third direction D3 is not less than the length P2 of the pillar portion 8 connected to the first connecting conductor 9 in the third direction D3 (C22≧P2). In the present embodiment, the length C22 of the first connecting conductor 11 in the third direction D3 is the same as the length C2 of the first connecting conductor 9 in the third direction D3 (C22 = C2). The length C22 of the second connecting conductor 12 in the third direction D3 is not less than the length P2 of the pillar portion 8 connected to the second connecting conductor 10 in the third direction D3 (C22≧P2). In the present embodiment, the length C22 of the second connecting conductor 12 in the third direction D3 is the same as the length C2 of the second connecting conductor 10 in the third direction D3 (C22 = C2).

[0040] As shown in FIG. 4, the length W1 of the first portion 7a of the second wiring portion 7 in the first direction D1 is longer than the length C1 of the first connecting conductor 9 in the first direction D1 (W1>C1). The length W2 of the second portion 7b of the second wiring portion 7 in the first direction D1 is longer than the length C1 of the second connecting conductor 10 in the first direction D1 (W2>C1).

[0041] As described above, in the multilayer coil component 1 according to the present embodiment, the length C1 of the first connecting conductor 9 (second connecting conductor 10) in the first direction D1 is longer than the length P1 of the pillar portion 8 connected to the first connecting conductor 9 (second connecting conductor 10) in the first direction D1, and is not more than the length E1 of the first terminal electrode 3 (second terminal electrode 4) in the first direction D1 (P1<C1≦E1). Thus, in the multilayer coil component 1, since the length of the first connecting conductor 9 (second connecting conductor 10) in the first direction D1 is made longer than the length of the pillar portion 8, the contact area between the first terminal electrode 3 (second terminal electrode 4) and the first connecting conductor 9 (second connecting conductor 10) can be increased. Therefore, in the multilayer coil component 1, the fixing strength between the first terminal electrode 3 (second terminal electrode 4) and the first connecting conductor 9 (second connecting conductor 10) can be improved. Thereby, disconnection between the first terminal electrode 3 (second terminal electrode 4) and the first connecting conductor 9 (second connecting conductor 10) can be suppressed. As a result, in the multilayer coil component 1, the reliability can be improved.

[0042] In the laminated coil component 1 according to this embodiment, each of the multiple second wiring sections 7 has a first section 7a, a second section 7b, and a third section 7c. In the laminated coil component 1, the length W1 of the first section 7a in the first direction D1 is longer than the length C1 of the first connecting conductor 9 in the first direction D1 (W1>C1), and the length W2 of the second section 7b in the first direction D1 is longer than the length C1 of the second connecting conductor 10 in the first direction D1 (W2>C1). The second wiring section 7 and the first connecting conductor 9 and the second connecting conductor 10 are positioned in a continuous position in the second direction D2. With this configuration, proximity between the first connecting conductor 9 and the second connecting conductor 10 and the third section 7c can be avoided in the second direction D2, thus suppressing the occurrence of short circuits between the first connecting conductor 9 and the second connecting conductor 10 and the third section 7c. Therefore, the reliability of the laminated coil component 1 can be improved.

[0043] The laminated coil component 1 according to this embodiment includes a first connecting conductor 11 and a second connecting conductor 12. The length C11 of the first connecting conductor 11 (second connecting conductor 12) in the first direction D1 is less than or equal to the length C1 of the first connecting conductor 9 (second connecting conductor 10) in the first direction D1, and greater than or equal to the length P1 of the pillar portion 8 in the first direction D1 (P1 ≤ C11 ≤ C1). In this configuration, the length C11 of the first connecting conductor 11 (second connecting conductor 12) can be set within the range of the length C1 of the first connecting conductor 9 (second connecting conductor 10) and the length P1 of the pillar portion 8. As a result, the contact area between the first connecting conductor 9 (second connecting conductor 10) and the first connecting conductor 11 (second connecting conductor 12) can be increased in the laminated coil component 1. Therefore, the bonding strength between the first connecting conductor 9 (second connecting conductor 10) and the first connecting conductor 11 (second connecting conductor 12) can be improved in the laminated coil component 1. This makes it possible to suppress the occurrence of disconnection between the first connecting conductor 9 (second connecting conductor 10) and the first connecting conductor 11 (second connecting conductor 12) in the laminated coil component 1. As a result, the reliability of the laminated coil component 1 can be improved.

[0044] In the laminated coil component 1, the length C11 of the first connecting conductor 11 (second connecting conductor 12) in the first direction D1 is set to be less than or equal to the length C1 of the first connecting conductor 9 (second connecting conductor 10) in the first direction D1 (C11 ≤ C1). This makes it possible to suppress an increase in stray capacitance formed between the second wiring section 7 and the first connecting conductor 11 and the second connecting conductor 12 in the laminated coil component 1.

[0045] In the laminated coil component 1 according to this embodiment, the length C2 of the third direction D3 of the first connecting conductor 9 and the second connecting conductor 10 is greater than or equal to the length P2 of the third direction D3 of the pillar portion 8 (C2 ≥ P2). With this configuration, the contact area between the first terminal electrode 3 and the first connecting conductor 9, and between the second terminal electrode 4 and the second connecting conductor 10 can be further increased.

[0046] 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.

[0047] In the above embodiment, an example was described in which the length C1 of the first connecting conductor 9 in the first direction D1 is the same as the length E1 of the first terminal electrode 3 in the first direction D1 (C1=E1). However, the length C1 of the first connecting conductor 9 may be shorter than the length E1 of the first terminal electrode 3. Similarly, the length C1 of the second connecting conductor 10 may be shorter than the length E1 of the second terminal electrode 4.

[0048] In the above embodiment, an example was described in which the length C11 of the first connecting conductor 11 in the first direction D1 is the same as the length C1 of the first connecting conductor 9 in the first direction D1 (C11=C1). However, the length C11 of the first connecting conductor 11 may be shorter than the length C1 of the first connecting conductor 9. Similarly, the length C11 of the second connecting conductor 12 may be shorter than the length C1 of the second connecting conductor 10.

[0049] In the above embodiments, the example shown in Figures 4 and 5 describes a configuration in which the length C2 of the first connecting conductor 9 in the third direction D3 is longer than the length P2 of the pillar portion 8 in the third direction D3. However, the length C2 of the first connecting conductor 9 may be the same as the length P2 of the pillar portion 8 (C2=P2).

[0050] In the above embodiment, a configuration in which the first terminal electrode 3 and the second terminal electrode 4 protrude beyond the main surface 2d was described as an example. However, the first terminal electrode 3 and the second terminal electrode 4 may be embedded within the base body 2. That is, the first terminal electrode 3 and the second terminal electrode 4 may be provided substantially flush with the main surface 2d. In this configuration, the plating layers provided on each of the first terminal electrode 3 and the second terminal electrode 4 may protrude beyond the main surface 2d. [Explanation of symbols]

[0051] 1...Laminated coil component, 2...Base body, 2a, 2b...End face, 2c, 2d...Main face, 2e, 2f...Side, 5...Coil, 6...First wiring section, 7...Second wiring section, 7a...First part, 7b...Second part, 7c...Third part, 8...Pillar section (connection section), 9...First connecting conductor, 10...Second connecting conductor, 11...First connecting conductor, 12...Second connecting conductor, D1...First direction, D2...Second direction, D3...Third direction.

Claims

1. A base body having a pair of end faces facing each other in a first direction, a mounting surface and a main surface facing each other in a second direction, and a pair of side surfaces facing each other in a third direction, On the mounting surface of the base body, a pair of terminal electrodes are arranged spaced apart in the first direction, A coil disposed within the substrate and electrically connected to a pair of terminal electrodes, comprising: a first wiring portion located on the main surface side; a second wiring portion located on the mounting surface side; and a connecting portion extending in the second direction and connecting the first wiring portion and the second wiring portion, wherein the coil axis is provided along the third direction, A connecting conductor electrically connects one end and the other end of the coil to each of the pair of terminal electrodes, Between the connecting conductor and the connecting portion that constitutes one end and the other end of the coil, a connecting conductor is provided which is positioned in the same location as the second wiring portion in the second direction, The connecting conductor connects the connecting portion that constitutes one end and the other end of the coil, respectively, and has one end closer to the end face and the other end further away from the end face in the first direction. The length of the connecting conductor in the first direction is longer than the length of the connecting portion connected to the connecting conductor in the first direction, and less than or equal to the length of the terminal electrode in the first direction. The length of the connecting conductor in the first direction is less than or equal to the length of the connecting conductor in the first direction, and is longer than the length of the connecting portion in the first direction. Viewed from the third direction, the connecting conductor is a laminated coil component connected to the connecting conductor at a position closer to one end.

2. Each of the multiple second wiring sections, when viewed from the second direction, A first portion that includes an area overlapping with the corresponding connecting portion, extends in the first direction, and is located near one of the end faces, A second portion which includes an area overlapping with the corresponding connecting portion, extends in the first direction and is located near the other end face, It has a third portion that connects the first portion and the second portion and is inclined with respect to the first direction, The laminated coil component according to claim 1, wherein the lengths of the first portion and the second portion in the first direction are longer than the length of the connecting conductor in the first direction.

3. The laminated coil component according to claim 1 or 2, wherein the length of the connecting conductor in the third direction is greater than or equal to the length of the connecting portion in the third direction.

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