Method for manufacturing laminated coil component

Abstract

To provide a method of manufacturing a laminated coil component capable of suppressing occurrence of variations in characteristics.SOLUTION: In the manufacturing method of the laminated coil component 1, the element body 2 is formed by laminating a plurality of resin layers, the coil 5 including the first wiring portion 6, the second wiring portion 7, and the pillar portion 8 is formed by using a photolithography method, and the pillar portion 8 includes a first pillar member 8A and a second pillar member 8B alternately laminated in the second direction D2. The area of the first surface 8A and the area of the second surface 8Aa of the first pillar member 8Ab are made larger than the area of the first surface 8B and the area of the second surface 8Ba of the second pillar member 8Bb, or made smaller than the area of the first surface 8B and the area of the second surface 8Ba of the second pillar member 8Bb.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] A known conventional laminated coil component is, for example, that described in Patent Document 1. The laminated coil component described in Patent Document 1 includes an element 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 coil disposed within the element body, and a pair of terminal electrodes disposed on the mounting surface of the element 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 connection portion extending in the second direction and connecting the first wiring portion and the second wiring portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-141945 Summary of the Invention [Problem to be solved by the invention]

[0004] The coil can be formed using a photolithography method. In this case, the connection portions of the coil are formed by multiple exposure and development processes, resulting in a configuration in which multiple connection members are stacked. Depending on the accuracy of alignment during exposure in the manufacturing process of the connection members, misalignment may occur in the stacking of the connection members. If misalignment occurs in the stacking of the connection members, the contact area between the connection members decreases, and the characteristics of the multilayer coil component may deteriorate. As such, the characteristics may change depending on the stacking of the connection members, which may result in variations in the characteristics of the multilayer coil component.

[0005] An object of one aspect of the present invention is to provide a method for manufacturing a laminated coil component that can suppress variations in characteristics. [Means for solving the problem]

[0006] A method for manufacturing a laminated coil component according to one aspect of the present invention is a method for manufacturing a laminated coil component including: an element body having a pair of end faces opposing each other in a first direction, a mounting surface and a main surface opposing each other in a second direction, and a pair of side surfaces opposing each other in a third direction; a pair of terminal electrodes arranged on the mounting surface of the element body; and a coil arranged within the element body and electrically connected to the pair of terminal electrodes, wherein the element body is formed by stacking a plurality of resin layers, and a coil is formed using a photolithography method, the coil including: a first wiring portion arranged on the main surface side; a second wiring portion arranged 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, the connecting portion having first connecting members and second connecting members stacked alternately in the second direction, the first connecting member having first and second surfaces opposing each other in the second direction, and the second connecting member having third and fourth surfaces opposing each other in the second direction, and the areas of the first and second surfaces being larger than or smaller than the areas of the third and fourth surfaces.

[0007] In a manufacturing method of a laminated coil component according to one aspect of the present invention, the areas of the first and second surfaces are set larger than the areas of the third and fourth surfaces, or smaller than the areas of the third and fourth surfaces. With this configuration, when the first or second surface of the first connecting member comes into contact with the third or fourth surface of the second connecting member, a sufficient contact area between the first or second surface of the first connecting member and the third or fourth surface of the second connecting member can be ensured. For example, when the areas of the first and second surfaces are larger than the areas of the third and fourth surfaces and the first surface comes into contact with the third surface, the area of ​​the first surface is larger than the area of ​​the third surface. Therefore, even if the position of the second connecting member is shifted relative to the first connecting member, the third surface can be contained within the first surface. Therefore, a contact area corresponding to at least the area of ​​the third surface can be ensured. Thus, in a laminated coil component manufactured by this manufacturing method for a laminated coil component, even if misalignment occurs in the lamination of the first connecting member and the second connecting member, a constant amount of contact area between the first connecting member and the second connecting member can be ensured (the amount of change in contact area can be reduced) compared to when the areas of the first and second faces are equal to the areas of the third and fourth faces. Therefore, in a laminated coil component manufactured by this manufacturing method for a laminated coil component, variation in the contact area between the first connecting member and the second connecting member can be suppressed. As a result, variation in characteristics can be suppressed in a laminated coil component manufactured by this manufacturing method for a laminated coil component.

[0008] In one embodiment, when viewed from the second direction, one of the outer edges of the first and second surfaces of the first connecting member and the third and fourth surfaces of the second connecting member may be located within the other of the outer edges of the first and second surfaces of the first connecting member and the third and fourth surfaces of the second connecting member. This configuration can more reliably ensure a constant contact area between the first connecting member and the second connecting member.

[0009] In one embodiment, one end of the connection portion in the second direction may be a first connection member, and the other end of the connection portion in the second direction may be a second connection member.

[0010] In one embodiment, the shapes of the first and second surfaces may be different from the shapes of the third and fourth surfaces when viewed from the second direction.

[0011] In one embodiment, a plurality of first wiring portions may be arranged side by side in the third direction, a plurality of second wiring portions may be arranged side by side in the third direction, a plurality of connecting portions may be provided to connect corresponding first wiring portions and second wiring portions, and the shapes of the first connecting member and the second connecting member of one connecting portion may be made different from the shapes of the first connecting member and the second connecting member of another connecting portion. In this configuration, by changing the shapes of the first connecting member and the second connecting member of each connecting portion, it is possible to adjust the characteristics. [Effects of the Invention]

[0012] According to one aspect of the present invention, it is possible to suppress variations in characteristics. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a laminated coil component according to one embodiment. [Figure 2] 2(a) is a perspective view showing the pillar portion, FIG. 2(b) is a side view of the pillar portion, and FIG. 2(c) is a view of a part of the pillar portion as seen from a second direction D2. [Figure 3] 3(a), 3(b), 3(c), and 3(d) are perspective views or side views of pillar portions of laminated coil components according to other embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and redundant description will be omitted.

[0015] A laminated coil component according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view of a laminated coil component according to one embodiment. As shown in Fig. 1, the laminated coil component 1 includes an element body 2, a first terminal electrode 3, a second terminal electrode 4, a coil 5, a first connecting portion 10, and a second connecting portion (not shown). For ease of explanation, the element body 2 is indicated by a two-dot chain line in Fig. 1.

[0016] The element body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and ridges, and a rectangular parallelepiped shape with rounded corners and ridges. The element body 2 has, as its outer surfaces, a pair of end faces 2a and 2b, a pair of main faces 2c and 2d, and a pair of side faces 2e and 2f. The end faces 2a and 2b face each other. The main faces 2c and 2d face each other. The side faces 2e and 2f face each other. Hereinafter, the facing direction of the end faces 2a and 2b is referred to as a first direction D1, the facing direction of the main faces 2c and 2d is referred to as a second direction D2, and the facing direction of the side faces 2e and 2f is referred to as a third direction D3. The first direction D1, the second direction D2, and the third direction D3 are approximately perpendicular to each other.

[0017] The end faces 2a, 2b extend in the second direction D2 to connect the principal faces 2c, 2d. The end faces 2a, 2b also extend in the third direction D3 to connect the side faces 2e, 2f. The principal faces 2c, 2d extend in the first direction D1 to connect the end faces 2a, 2b. The principal faces 2c, 2d also extend in the third direction D3 to connect the side faces 2e, 2f. The side faces 2e, 2f extend in the first direction D1 to connect the end faces 2a, 2b. The side faces 2e, 2f also extend in the second direction D2 to connect the principal faces 2c, 2d.

[0018] The main surface 2d is a mounting surface that faces another electronic device (not shown) when the laminated coil component 1 is mounted on the other electronic device (for example, a circuit board or a laminated electronic component). The end surfaces 2a and 2b are surfaces that are continuous with the mounting surface (i.e., the main surface 2d).

[0019] The length of the element body 2 in the first direction D1 is longer than the length of the element body 2 in the second direction D2 and the length of the element body 2 in the third direction D3. The length of the element body 2 in the second direction D2 is shorter than the length of the element 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 have a rectangular shape. The length of the element body 2 in the second direction D2 may be equal to the length of the element body 2 in the third direction D3, or may be longer than the length of the element body 2 in the third direction D3.

[0020] In this embodiment, "equivalent" does not only mean equal, but also may mean values ​​that include slight differences or manufacturing errors within a preset range. For example, if multiple values ​​are within a range of ±5% of the average value of the multiple values, the multiple values ​​are defined as equivalent.

[0021] The element body 2 is formed by stacking multiple element body layers (not shown) in the second direction D2. That is, the stacking direction of the element body 2 is the second direction D2. In an actual element body 2, the multiple element body layers may be integrated to the extent that the boundaries between the layers are not visible, or may be integrated so that the boundaries between the layers are visible.

[0022] The element layer is a resin layer. The material of the element layer includes at least one selected from the group consisting of liquid crystal polymer, polyimide resin, crystalline polystyrene, epoxy resin, acrylic resin, bismaleimide resin, and fluorine resin. The element layer includes a filler. The filler is, for example, an inorganic filler. An example of the inorganic filler is silica. Note that the element layer does not necessarily need to include a filler.

[0023] The base layer may be configured to include a magnetic material. The magnetic material of the base layer may include, for example, a Ni-Cu-Zn ferrite material, a Ni-Cu-Zn-Mg ferrite material, or a Ni-Cu ferrite material. The magnetic material of the base layer may include, for example, an Fe alloy. The base layer may include, for example, a non-magnetic material. The non-magnetic material of the base layer may include, for example, a glass ceramic material or a dielectric material.

[0024] The first terminal electrode 3 and the second terminal electrode 4 are each provided on the element body 2. The first terminal electrode 3 and the second terminal electrode 4 are each arranged 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 spaced apart 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. The second terminal electrode 4 is arranged on the end surface 2b side of the element body 2.

[0025] Each of the first terminal electrode 3 and the second terminal electrode 4 has a rectangular shape (rectangular shape). Each of the first terminal electrode 3 and the second terminal electrode 4 is arranged so that each side extends along the first direction D1 or the third direction D3. The first terminal electrode 3 and the second terminal electrode 4 protrude from the main surface 2d. That is, in this embodiment, each surface of the first terminal electrode 3 and the second terminal electrode 4 is 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).

[0026] 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, Au, etc. by electrolytic plating or electroless plating. The plating layer may include, for example, a Ni plating film containing Ni and covering the first terminal electrode 3 and the second terminal electrode 4, and an Au plating film containing Au and covering the Ni plating film.

[0027] The coil 5 is disposed within the element body 2. The coil 5 has a plurality of first wiring portions 6, a plurality of second wiring portions 7, and a plurality of pillar portions (connecting portions) 8. The coil 5 is configured by electrically connecting the first wiring portions 6, the second wiring portions 7, and the pillar portions 8. The coil axis of the coil 5 is provided along the third direction D3. The plurality of first wiring portions 6, the plurality of second wiring portions 7, and the plurality of pillar portions 8 are configured of a conductive material (for example, Cu). The first wiring portions 6, the second wiring portions 7, and the pillar portions 8 are disposed apart from the end faces 2a, 2b, the main faces 2c, 2d, and the side faces 2e, 2f.

[0028] Each of the first wiring portions 6 is arranged on the principal surface 2c side of the element body 2. Each of the first wiring portions 6 extends along the first direction D1. Each of the first wiring portions 6 connects two pillar portions 8. The first wiring portion 6 is bridged across the two pillar portions 8. One end of each of the first wiring portions 6 in the extension direction (the end on the end surface 2a side) is connected to one end of each of the pillar portions 8 (the end on the principal surface 2c side). The other end of each of the first wiring portions 6 in the extension direction (the end on the end surface 2b side) is connected to one end of each of the pillar portions 8.

[0029] Each of the second wiring portions 7 is disposed on the main surface 2d (mounting surface) side of the element body 2. Each of the second wiring portions 7 extends in the first direction D1. Each of the second wiring portions 7 connects two pillar portions 8. The second wiring portion 7 is bridged across the two pillar portions 8. One end of the second wiring portion 7 in the extension direction (the end on the end surface 2a side) is connected to the other end of the pillar portion 8 (the end on the main surface 2d side). The other end of the second wiring portion 7 in the extension direction (the end on the end surface 2b side) is connected to the other end of the pillar portion 8. The number of the multiple second wiring portions 7 is one less than the number of the multiple first wiring portions 6. In other words, if there are n first wiring portions 6, there will be n-1 second wiring portions 7.

[0030] The pillar portions 8 are respectively arranged on the end face 2a side and the end face 2b side of the element body 2. Each of the pillar portions 8 extends along the second direction D2. The pillar portions 8 connect the first wiring portion 6 and the second wiring portion 7. One end of each pillar portion 8 is connected to one end and the other end of the first wiring portion 6. The other end of each pillar portion 8 is connected to one end and the other end of the second wiring portion 7.

[0031] The first connection portion 10 connects the first terminal electrode 3 and one end of the coil 5. The first connection portion 10 is connected to the other end of the pillar portion 8 of the coil 5. The first connection portion 10 is made of a conductive material (for example, Cu). The second connection portion connects the second terminal electrode 4 and the other end of the coil 5. The second connection portion is connected to the other end of the pillar portion 8 of the coil 5. The second connection portion is made of a conductive material (for example, Cu).

[0032] Next, a detailed description will be given of the configuration of the pillar portion 8 of the coil 5. Fig. 2(a) is a perspective view showing the pillar portion 8, Fig. 2(b) is a side view of the pillar portion 8, and Fig. 2(c) is a view of a part of the pillar portion 8 as seen from the second direction D2.

[0033] As shown in Figures 2(a), 2(b), and 2(c), the pillar portion 8 has a plurality of first pillar members (first connecting members) 8A and a plurality of second pillar members (second connecting members) 8B. In the pillar portion 8, the first pillar members 8A and the second pillar members 8B are stacked alternately. The example shown in Figures 2(a) and 2(b) shows a configuration in which two first pillar members 8A and two second pillar members 8B are stacked.

[0034] 2(a) and 2(b), the first pillar member 8A forms one end of the pillar portion 8, and the second pillar member 8B forms the other end of the pillar portion 8. In this configuration, the first pillar member 8A is connected to the first wiring portion 6, and the second pillar member 8B is connected to the second wiring portion 7. When the number of first pillar members 8A and the number of second pillar members 8B in the pillar portion 8 are each even numbers, one of the first pillar member 8A and the second pillar member 8B is connected to the first wiring portion 6, and the other of the first pillar member 8A and the second pillar member 8B is connected to the second wiring portion 7.

[0035] As shown in Fig. 2(a), the first pillar member 8A has a rectangular parallelepiped shape. As shown in Fig. 2(b), the first pillar member 8A has a first surface 8Aa and a second surface 8Ab. The first surface 8Aa and the second surface 8Ab face each other in the second direction D2. The first surface 8Aa and the second surface 8Ab have a rectangular shape.

[0036] As shown in Fig. 2(a), the second pillar member 8B has a rectangular parallelepiped shape. As shown in Fig. 2(b), the second pillar member 8B has a first surface (third surface) 8Ba and a second surface (fourth surface) 8Bb. The first surface 8Ba and the second surface 8Bb face each other in the second direction D2. The first surface 8Ba and the second surface 8Bb have a rectangular shape. That is, the first surface 8Ba and the second surface 8Bb have the same shape as the first surface 8Aa and the second surface 8Ab.

[0037] The first pillar member 8A is larger than the second pillar member 8B. In other words, the second pillar member 8B is smaller than the first pillar member 8A. The areas (surface areas) of the first surface 8Aa and the second surface 8Ab of the first pillar member 8A are larger than the areas of the first surface 8Ba and the second surface 8Bb of the second pillar member 8B. In other words, the areas of the first surface 8Ba and the second surface 8Bb of the second pillar member 8B are smaller than the areas of the first surface 8Aa and the second surface 8Ab of the first pillar member 8A.

[0038] In the pillar portion 8, the first surface 8Aa of the first pillar member 8A and the second surface 8Bb of the second pillar member 8B are in contact with each other, and the second surface 8Ab of the first pillar member 8A and the first surface 8Ba of the second pillar member 8B are in contact with each other. As shown in FIG. 2(c), when viewed from the second direction D2, the outer edges of the first surface 8Ba and the second surface 8Bb of the second pillar member 8B are located within the outer edges of the first surface 8Aa and the second surface 8Ab of the first pillar member 8A. The first surface 8Ba of the second pillar member 8B is located within the second surface 8Ab of the first pillar member 8A. In other words, the entire surface of the first surface 8Ba of the second pillar member 8B is in contact with the second surface 8Ab of the first pillar member 8A. The second surface 8Bb of the second pillar member 8B is located within the first surface 8Aa of the first pillar member 8A. That is, the entire second surface 8Bb of the second pillar member 8B is in contact with the first surface 8Aa of the first pillar member 8A.

[0039] The laminated coil component 1 can be manufactured, for example, as follows. The element body 2 can be formed by laminating sheets that constitute element body layers. The coil 5 (first wiring portion 6, second wiring portion 7, pillar portion 8), first connecting portion 10, and second connecting portion can be manufactured using a photolithography method. The "photolithography method" may be any method that processes a layer to be processed, which contains a photosensitive material, into a desired pattern by exposing and developing it, and is not limited to a specific type of mask.

[0040] Specifically, the pillar portion 8 is formed by exposing and developing a layer to be processed that contains a photosensitive material to light, thereby forming a first pillar member 8A (second pillar member 8B). Similarly, the second pillar member 8B (first pillar member 8A) is formed on the first pillar member 8A (second pillar member 8B). In this manner, the pillar portion 8 is formed by forming the first pillar member 8A and the second pillar member 8B so that they are stacked.

[0041] As described above, in the laminated coil component 1 according to the present embodiment, the area of ​​the first surface 8Aa and the area of ​​the second surface 8Ab of the first pillar member 8A are larger than the area of ​​the first surface 8Ba and the area of ​​the second surface 8Bb of the second pillar member 8B. With this configuration, when the first surface 8Aa of the first pillar member 8A comes into contact with the second surface 8Bb of the second pillar member 8B and the second surface 8Ab of the first pillar member 8A comes into contact with the first surface 8Ba of the second pillar member 8B, it is possible to ensure the contact area between the first surface 8Aa of the first pillar member 8A and the second surface 8Bb of the second pillar member 8B and the contact area between the second surface 8Ab of the first pillar member 8A and the first surface 8Ba of the second pillar member 8B. In this way, because the areas of the first surface 8Aa and the second surface 8Ab are larger than the areas of the first surface 8Ba and the second surface 8Bb, even if the second pillar member 8B is misaligned with respect to the first pillar member 8A, the first surface 8Ba and the second surface 8Bb can be contained within the first surface 8Aa and the second surface 8Ab. In this way, in the laminated coil component 1, a constant amount of contact area between the first pillar member 8A and the second pillar member 8B can be ensured (the amount of change in contact area can be reduced). Therefore, in the laminated coil component 1, it is possible to suppress variations in the contact area between the first pillar member 8A and the second pillar member 8B. As a result, it is possible to suppress variations in the characteristics of the laminated coil component 1.

[0042] 2(c), in the laminated coil component 1 according to the present embodiment, the outer edges of the first surface 8Ba and the second surface 8Bb of the second pillar member 8B are located within the outer edges of the first surface 8Aa and the second surface 8Ab of the first pillar member 8A. With this configuration, it is possible to more reliably ensure a constant amount of contact area between the first pillar member 8A and the second pillar member 8B.

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

[0044] In the above embodiment, an example has been described in which the first terminal electrode 3 and the second terminal electrode 4 protrude beyond the main surface 2d. However, the first terminal electrode 3 and the second terminal electrode 4 may be embedded in the element 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 the first terminal electrode 3 and the second terminal electrode 4 may protrude beyond the main surface 2d.

[0045] In the above embodiment, an example has been described in which the areas (surface areas) of the first surface 8Aa and the second surface 8Ab of the first pillar member 8A are larger than the areas of the first surface 8Ba and the second surface 8Bb of the second pillar member 8B. However, the areas of the first surface 8Aa and the second surface 8Ab of the first pillar member 8A may be smaller than the areas of the first surface 8Ba and the second surface 8Bb of the second pillar member 8B.

[0046] In the above embodiment, an example has been described in which the first pillar member 8A and the second pillar member 8B in the pillar portion 8 have a rectangular parallelepiped shape. However, the shapes of the first pillar member 8A and the second pillar member 8B are not limited to this. As shown in FIG. 3(a), the first pillar member 8A and the second pillar member 8B may have different shapes. For example, the first pillar member 8A may have a cylindrical shape, and the second pillar member 8B may have a rectangular shape.

[0047] As shown in Figure 3(b), the first pillar member 8A and the second pillar member 8B may have a cylindrical shape. As shown in Figures 3(c) and 3(d), the first pillar member 8A and the second pillar member 8B may have a truncated cone shape. In Figures 3(c) and 3(d), the first pillar member 8A and the second pillar member 8B have different orientations (are inverted) in the second direction D2.

[0048] In the above embodiment, an example has been described in which the plurality of pillar portions 8 have the same configuration. However, among the plurality of pillar portions 8, one pillar portion 8 may have a different configuration from the other pillar portions 8. For example, one pillar portion 8 may have the configuration shown in FIG. 2, and the other pillar portions 8 may have the configuration shown in FIG. 3(a). With this configuration, it is possible to adjust the characteristics of the laminated coil component 1. [Explanation of symbols]

[0049] 1...multilayer coil component, 2...element body, 2a, 2b...end face, 2c...main surface, 2d...main surface (mounting surface), 2e, 2f...side surface, 5...coil, 6...first wiring portion, 7...second wiring portion, 8...pillar portion (connection portion), 8A...first pillar member (first connecting member), 8Aa...first surface, 8Ab...second surface, 8B...second pillar member (second connecting member), 8Ba...first surface (third surface), 8Bb...second surface (fourth surface), D1...first direction, D2...second direction, D3...third direction.

Claims

1. an element 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 pair of terminal electrodes disposed on the mounting surface of the element body; a coil disposed within the element body and electrically connected to a pair of the terminal electrodes, The element body is formed by laminating a plurality of resin layers, forming the coil using a photolithography method, the coil including a first wiring portion disposed on the main surface side, a second wiring portion disposed on the mounting surface side, and a connection portion extending in the second direction and connecting the first wiring portion and the second wiring portion; the connection portion includes first connection members and second connection members that are alternately stacked in the second direction, the first connection member has a first surface and a second surface facing each other in the second direction, the second connection member has a third surface and a fourth surface opposing each other in the second direction, a manufacturing method for a laminated coil component, wherein an area of ​​the first surface and an area of ​​the second surface are made larger than an area of ​​the third surface and an area of ​​the fourth surface, or smaller than an area of ​​the third surface and an area of ​​the fourth surface.

2. 2. The method for manufacturing a laminated coil component according to claim 1, wherein, when viewed from the second direction, an outer edge of one of the first surface and the second surface of the first connecting member and the third surface and the fourth surface of the second connecting member is located within an outer edge of the other of the first surface and the second surface of the first connecting member and the third surface and the fourth surface of the second connecting member.

3. one end of the connection portion in the second direction is the first connection member, The method for manufacturing a laminated coil component according to claim 1 or 2, wherein the other end of the connection portion in the second direction serves as the second connection member.

4. 4. The method for manufacturing a laminated coil component according to claim 1, wherein, when viewed from the second direction, a shape of the first surface and the second surface is made different from a shape of the third surface and the fourth surface.

5. A plurality of the first wiring portions are arranged side by side in the third direction, a plurality of the second wiring portions are arranged side by side in the third direction; a plurality of the connection portions are provided so as to connect the corresponding first wiring portions and the corresponding second wiring portions; 5. The method for manufacturing a laminated coil component according to claim 1, wherein, in the plurality of connection portions, shapes of the first connection member and the second connection member of one connection portion are made different from shapes of the first connection member and the second connection member of another connection portion.

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