Inductor, substrate module and method for manufacturing inductor

Abstract

An inductor (100) is provided with a magnetic core section (10), a coil section (20), a first electrode section (31), and a second electrode section (32). The magnetic core part (10) has a bottom surface (16), a top surface (17), a first side surface (11), a second side surface (12), a third side surface (13), and a fourth side surface (14). The coil part (20) is disposed such that a coil axis (Ax) intersects the first side surface (11), and has one end (20a) and the other end (20b) located at both ends of a conduction path of the coil part (20). One end (20a) and the other end (20b) are in contact with the third side surface (13) and are arranged on the third side surface (13) at a distance from each other. The first electrode part (31) is connected to one end (20a) on the third side surface (13) and is disposed along the third side surface (13). The second electrode section (32) is connected to the other end (20b) on the third side surface (13), and is disposed along the third side surface (13).

Description

Technical Field

[0001] The present disclosure relates to an inductor, a substrate module including the inductor, and a method for manufacturing the inductor. Background Art

[0002] Inductors are passive components that store electrical energy as magnetic energy for the purpose of increasing or decreasing power supply voltage or smoothing direct current, and are used in, for example, DC-DC converter devices, etc. Inductors are mounted on the surface of, for example, a printed circuit board, etc.

[0003] Patent Document 1 discloses an inductor including a core body, a coil element wound around the core body, and two core members arranged at both ends of the coil element.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-129253 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] Inductors are expected to have improved mounting efficiency when mounted on a printed circuit board. The present disclosure provides an inductor and the like capable of improving mounting efficiency.

[0009] Means used to solve problems

[0010] An inductor according to one embodiment of the present disclosure comprises: a core portion including a magnetic material; a coil portion provided inside the core portion; and a first electrode portion and a second electrode portion arranged outside the core portion, wherein the core portion is in the shape of a rectangular parallelepiped and has a bottom surface, a top surface opposite to the bottom surface, a first side surface connecting the bottom surface and the top surface, a second side surface opposite to the first side surface, a vertical third side surface connecting the bottom surface and the top surface, and a fourth side surface opposite to the third side surface, wherein the coil portion is arranged in a manner such that a coil axis intersects the first side surface, and has one end and the other end located at both ends of a conducting path of the coil portion, wherein one end and the other end of the coil portion are in contact with the third side surface and are arranged on the third side surface at a distance from each other, wherein the first electrode portion is connected to one end of the coil portion at the third side surface and is arranged along the third side surface, and wherein the second electrode portion is connected to the other end of the coil portion at the third side surface and is arranged along the third side surface.

[0011] A substrate module according to one aspect of the present disclosure includes: the above-mentioned inductor; an electronic component different from the inductor; and a printed circuit board on which the inductor is mounted, the electronic component being arranged between the bottom surface of the magnetic core portion of the inductor and the printed circuit board.

[0012] A method for manufacturing an inductor according to one embodiment of the present disclosure is a method for manufacturing an inductor, the inductor comprising: a core portion including a magnetic material; a coil portion disposed inside the core portion; and a first electrode portion and a second electrode portion connected to the coil portion and disposed outside the core portion, the method comprising: a step of forming a punched conductor plate by punching a metal plate, the punched conductor plate including a region constituted by the coil portion, the first electrode portion, and the second electrode portion; a step of forming the core portion in a rectangular shape having four sides and forming the coil portion having a coil axis intersecting two sides of the core portion by covering a portion of the punched conductor plate with a magnetic material; and a step of forming the first electrode portion and the second electrode portion protruding from one of two other side surfaces different from the two side surfaces by bending the punched conductor plate that is not covered by the magnetic material and is located outside the core portion.

[0013] Effects of the Invention

[0014] According to the inductor and the like of the present disclosure, it is possible to improve mounting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a perspective view showing an inductor according to the embodiment.

[0016] Figure 2 It is a diagram showing a coil portion, an electrode portion, and the like of an inductor according to an embodiment.

[0017] Figure 3 The diagrams are a front view, a left side view, a right side view, a top view, and a bottom view of the inductor according to the embodiment.

[0018] Figure 4 1 is a flowchart showing a method for manufacturing an inductor according to an embodiment.

[0019] Figure 5 This is a diagram showing a metal plate serving as a material for a coil portion, an electrode portion, and the like.

[0020] Figure 6 FIG. 1 is a diagram showing a punched conductor plate formed by a punching step.

[0021] Figure 7 It is a diagram showing a core portion and a coil portion, etc. formed by a core portion forming step.

[0022] Figure 8 It is a diagram showing a substrate module including an inductor according to an embodiment.

[0023] Fig. 9A This is a diagram showing an inductor, wiring, land electrodes, and the like provided on a substrate module according to an embodiment as viewed from above.

[0024] Fig. 9B This is a diagram showing another example of the substrate module.

[0025] Fig.10 It is a front view of an inductor according to Modification 1 of the embodiment.

[0026] Fig.11 These are a front view, a left side view, and a right side view of an inductor according to a second modification of the embodiment. DETAILED DESCRIPTION

[0027] Hereinafter, the embodiments are described in more detail with reference to the accompanying drawings. In addition, the embodiments described below are all specific examples of the present disclosure. The numerical values, shapes, materials, constituent elements, configuration positions of constituent elements, connection methods, steps, and the order of steps shown in the following embodiments are only examples, and their purpose is not to limit the present disclosure. In addition, among the constituent elements of the following embodiments, constituent elements not recorded in the independent technical solutions are described as arbitrary constituent elements.

[0028] In addition, in this specification, terms such as parallel that indicate the relationship between elements, terms such as rectangular that indicate the shape of elements, and numerical ranges do not express only strict meanings, but also include substantially equivalent ranges, such as expressions of differences of about several percent.

[0029] In addition, each figure is a schematic diagram that is appropriately emphasized, omitted, or adjusted in proportion to illustrate the present disclosure, and is not necessarily a strict illustration, and sometimes differs from the actual shape, positional relationship, and proportion. In each figure, the same reference numeral is attached to substantially the same structure, and repeated descriptions are sometimes omitted or simplified.

[0030] In addition, the X-axis, Y-axis, and Z-axis, which are three mutually orthogonal directions, are shown in each figure, and these axes and axial directions along these axes are used for explanation as needed. In addition, each axis is added for explanation and does not limit the direction and posture of using the inductor.

[0031] In addition, in this specification, terms such as "top surface" and "bottom surface" in the structure of an inductor do not refer to the top surface (the surface on the vertically upper side) and the bottom surface (the surface on the vertically lower side) in absolute spatial recognition, but are used as terms defined by the relative positional relationship of the constituent elements of the inductor.

[0032] (Implementation Method)

[0033] [Inductor Structure]

[0034] The structure of the inductor according to the embodiment will be described. The inductor is a passive element that stores electric energy flowing through a coil portion as magnetic energy.

[0035] Figure 1 1 is a perspective view showing an inductor 100 according to the embodiment. Figure 2 1 is a diagram showing the coil portion 20 , the electrode portion 30 , and the like of the inductor 100 . Figure 3 1 and 2 are a front view, a left side view, a right side view, a top view, and a bottom view of the inductor 100 .

[0036] Figure 2 Shows from Figure 1 The inductor 100 shown is in a state where the magnetic core portion 10 is removed. Figure 3 (a) is a front view, (b) is a left view, (c) is a right view, (d) is a top view, and (e) is a bottom view. The front view is a view of the inductor 100 viewed from the X-axis direction, the left view and the right view are views of the inductor 100 viewed from the Y-axis direction, and the top view and the bottom view are views of the inductor 100 viewed from the Z-axis direction.

[0037] Figure 1 to Figure 3 The inductor 100 shown in the figure includes a core portion 10 made of a magnetic material, a coil portion 20 provided inside the core portion 10, and an electrode portion 30 arranged outside the core portion 10. In addition, the inductor 100 includes an auxiliary conductor portion 40 for assisting the posture of the core portion 10. Figure 2 As shown, the coil portion 20, the electrode portion 30, and the auxiliary conductor portion 40 are formed by a portion of the metal member M.

[0038] Figure 1 The inductor 100 shown has a general shape determined by the shape of the core portion 10, which is a rectangular magnetic molded body. In addition, the core portion 10 can be formed into any shape by die forming. In other words, the inductor 100 of any shape can be realized according to the shape of the core portion 10 during forming. For example, the size of the core portion 10 in the X-axis direction is 5.6 mm, the size in the Y-axis direction is 9.0 mm, and the size in the Z-axis direction is 6.7 mm.

[0039] The core portion 10 is the outer shell portion of the inductor 100 and covers a portion of the metal member M. The core portion 10 includes a magnetic material, for example, a powdered magnetic core composed of a metal magnetic powder and a resin material. In addition, the core portion 10 can be formed using a magnetic material. The magnetic material can be ferrite or other magnetic materials. The metal magnetic powder uses a granular material having a prescribed elemental composition such as Fe-Si-Al, Fe-Si, Fe-Si-Cr, or Fe-Si-Cr-B. In addition, the resin material is selected from a material such as a silicone resin that can insulate the particles of the metal magnetic powder and can maintain a certain shape by bonding the particles of the metal magnetic powder.

[0040] like Figure 1 and Figure 3 As shown, the core portion 10 is, for example, a rectangular parallelepiped. The core portion 10 has a bottom surface 16, a top surface 17 on the side opposite to the bottom surface 16, and four side surfaces 11, 12, 13, and 14 connecting the bottom surface 16 and the top surface 17. The four side surfaces are composed of a first side surface 11, a second side surface 12, a third side surface 13, and a fourth side surface 14. Figure 1 and Figure 3 In the core portion 10 , four side surfaces 11 to 14 form the outer peripheral side surfaces.

[0041] The first side surface 11 and the second side surface 12 are arranged in the X-axis direction and are opposite to each other. The third side surface 13 and the fourth side surface 14 are arranged in the Y-axis direction and are opposite to each other. The bottom surface 16 and the top surface 17 are arranged in the Z-axis direction and are opposite to each other. The bottom surface 16, the top surface 17 and the four side surfaces 11 to 14 are respectively substantially flat planes. The bottom surface 16 of the core portion 10 has a rectangular shape, the first side surface 11 and the second side surface 12 are connected to the long side of the bottom surface 16, and the third side surface 13 and the fourth side surface 14 are connected to the short side of the bottom surface 16.

[0042] The group of the bottom surface 16 and the top surface 17, the group of the first side surface 11 and the second side surface 12, and the group of the third side surface 13 and the fourth side surface 14 are groups of surfaces that have a parallel positional relationship. The bottom surface 16 and the top surface 17 have a perpendicular positional relationship with the side surfaces 11 to 14, and the first side surface 11 and the second side surface 12 have a perpendicular positional relationship with the third side surface 13 and the fourth side surface 14. The corner portions (ridgeline portions) where the surfaces of the core portion 10 intersect may also have rounded corners.

[0043] Figure 1 and Figure 2 The illustrated metal member M has a coil portion 20 located inside the core portion 10 , an electrode portion 30 located outside the core portion 10 , and an auxiliary conductor portion 40 located inside and outside the core portion 10 .

[0044] The metal member M is formed, for example, by punching a metal flat plate having a thickness of 1 mm and then bending it. The metal member M is made of a metal material selected from metals such as aluminum, copper, silver, and gold, alloys containing one or more of these metals, and materials composed of metals or alloys and other substances. The coil portion 20, the electrode portion 30, and the auxiliary conductor portion 40 are names given to the respective parts formed by processing a member composed of the same material.

[0045] The coil part 20 is covered by the core part 10. The coil part 20 is arranged so that the coil axis Ax intersects the first side surface 11 and the second side surface 12. Specifically, the coil part 20 is arranged so that the coil axis Ax is perpendicular to the first side surface 11 and the second side surface 12.

[0046] The coil portion 20 is flat, and the plane 20f of the coil portion 20 is perpendicular to the bottom surface 16. The plane 20f of the coil portion 20 is the coil surface of the flat coil perpendicular to the coil axis Ax. In addition, when viewed from the top surface 17 side, the coil portion 20 is configured at a position closer to the first side surface 11 than the second side surface 12. In other words, when viewed from the top surface 17 side, the coil portion 20 is located at a position closer to the first side surface 11 than the midline between the first side surface 11 and the second side surface 12.

[0047] The coil portion 20 has a coil main body 21 and two coil lead-out portions 22 a and 22 b connected to both ends of the coil main body 21 .

[0048] The coil body 21 is an arc-shaped and strip-shaped plate with a winding number of 0.5 turns. The shape of the coil body 21 is not limited to an arc shape, and may also be a C-shape, a U-shape, or a V-shape. The cross-section of the coil body 21 is a rectangle, for example, the long side is 2.5 mm and the short side is 1.0 mm. The coil body 21 is wound in a manner that the short side is parallel to the coil axis Ax. The shape, number of windings, and coil length of the coil body 21 are not particularly limited, and are appropriately selected based on restrictions such as the performance required for the inductor 100 and the size of the magnetic core portion 10.

[0049] The two coil lead-out portions 22a and 22b are connected to both ends of the coil body 21. One of the two coil lead-out portions 22a and 22b is led out linearly from the end portion on the bottom surface 16 side of the coil body 21 toward the third side surface 13, and the other coil lead-out portion 22b is led out linearly from the end portion on the top surface 17 side of the coil body 21 toward the third side surface 13.

[0050] The coil part 20 has one end 20a and the other end 20b located at both ends of the conduction path of the coil part 20. The one end 20a of the coil part 20 is located at the front end of one coil lead-out part 22a, and the other end 20b of the coil part 20 is located at the front end of the other coil lead-out part 22b.

[0051] One end 20a and the other end 20b of the coil portion 20 are connected to the third side surface 13 and are arranged at intervals from each other on the third side surface 13. One end 20a of the coil portion 20 is arranged on a side closer to the bottom surface 16 than the other end 20b. In other words, the other end 20b of the coil portion 20 is arranged on a side closer to the top surface 17 than the one end 20a. In addition, the one end 20a and the other end 20b are arranged at the same distance from the first side surface 11. In other words, when viewed from a direction perpendicular to the third side surface 13, the one end 20a and the other end 20b are arranged on the same axis in the Z-axis direction.

[0052] The electrode portion 30 is a portion that is connected to a wiring pattern or the like on a printed circuit board when the inductor 100 is mounted on the printed circuit board. The electrode portion 30 is composed of a first electrode portion 31 and a second electrode portion 32 .

[0053] Figure 1 and Figure 3 The first electrode portion 31 and the second electrode portion 32 shown protrude from the third side surface 13, which is one of the four side surfaces. The first electrode portion 31 is connected to one end 20a of the coil portion 20 at the third side surface 13 and is arranged along the third side surface 13. The second electrode portion 32 is connected to the other end 20b of the coil portion 20 at the third side surface 13 and is arranged along the third side surface 13. When viewed from a direction perpendicular to the third side surface 13, the first electrode portion 31 is arranged between one end 20a of the coil portion 20 and the first side surface 11, and the second electrode portion 32 is arranged between the other end 20b of the coil portion 20 and the second side surface 12.

[0054] The first electrode portion 31 is plate-shaped, and has a first lead portion 31 a connected to the one end 20 a of the coil portion 20 , and a first leg portion 31 b connected to the first lead portion 31 a .

[0055] The first lead portion 31a is bent toward the first side surface 11 from the one end 20a of the coil portion 20 as a starting point, and extends linearly from the one end 20a to a direction close to the first side surface 11 along the third side surface 13. Specifically, the first lead portion 31a is parallel to a direction perpendicular to the first side surface 11, and extends from the one end 20a of the coil portion 20 to the same surface as the first side surface 11. In addition, the thickness of the region of the first lead portion 31a that is bent from the one end 20a as a starting point is thinner than the thickness of the linear region other than the bent region.

[0056] When viewed from the first lead portion 31a, the first leg portion 31b is located on the bottom surface 16 side of the first lead portion 31a. The first leg portion 31b is connected to a portion of the surface on the bottom surface 16 side of the first lead portion 31a, and extends linearly at least to the same surface as the bottom surface 16. The first leg portion 31b of the present embodiment protrudes to the side opposite to the top surface 17 from the bottom surface 16 in the Z-axis direction.

[0057] The second electrode portion 32 is plate-shaped and has a second lead portion 32 a connected to the other end 20 b of the coil portion 20 and a second leg portion 32 b connected to the second lead portion 32 a .

[0058] The second lead-out portion 32a is bent toward the second side surface 12 with the other end 20b of the coil portion 20 as a starting point, and extends linearly from the other end 20b along the third side surface 13 to a direction close to the second side surface 12. Specifically, the second lead-out portion 32a is parallel to a direction perpendicular to the first side surface 11, and extends from the other end 20b of the coil portion 20 to the same surface as the second side surface 12. That is, the second lead-out portion 32a is bent in a direction opposite to the first lead-out portion 31a, and extends in a direction opposite to the first lead-out portion 31a. In addition, the thickness of the region of the second lead-out portion 32a that is bent with the other end 20b as a starting point is thinner than the thickness of the linear region other than the bent region.

[0059] When viewed from the second lead portion 32a, the second leg portion 32b is located on the bottom surface 16 side of the second lead portion 32a. The second leg portion 32b is connected to a portion of the surface on the bottom surface 16 side of the second lead portion 32a, and extends linearly at least to the same surface as the bottom surface 16. The second leg portion 32b of the present embodiment protrudes from the bottom surface 16 to the side opposite to the top surface 17 in the Z-axis direction.

[0060] The auxiliary conductor portion 40 is a portion for assisting the posture of the core portion 10 and has a portion protruding outward from the fourth side surface 14. The auxiliary conductor portion 40 has an embedded portion 40c embedded in the core portion 10, an auxiliary lead portion 40a connected to the embedded portion 40c, and an auxiliary leg portion 40b connected to the auxiliary lead portion 40a.

[0061] One end of the embedded portion 40 c is connected to a part of the coil portion 20 , and the other end 40 c 2 is in contact with the fourth side surface 14 .

[0062] The auxiliary lead-out portion 40a is connected to the other end 40c2 of the embedded portion 40c at the fourth side surface 14. The auxiliary lead-out portion 40a is bent toward the second side surface 12 with the other end 40c2 of the embedded portion 40c as a starting point, and extends linearly along the fourth side surface 14 in a direction close to the second side surface 12. Specifically, the auxiliary lead-out portion 40a is parallel to a direction perpendicular to the first side surface 11, and extends to a position in the middle of the first side surface 11 and the second side surface 12. In addition, the thickness of the region bent with the other end 40c2 of the auxiliary lead-out portion 40a as a starting point is thinner than the thickness of the linear region other than the bent region.

[0063] When viewed from the auxiliary lead-out portion 40a, the auxiliary leg portion 40b is located on the bottom surface 16 side of the auxiliary lead-out portion 40a. The auxiliary leg portion 40b is connected to a portion of the surface on the bottom surface 16 side of the auxiliary lead-out portion 40a, and extends linearly at least to the same surface as the bottom surface 16. The auxiliary leg portion 40b of the present embodiment protrudes from the bottom surface 16 to the side opposite to the top surface 17 in the Z-axis direction.

[0064] Thus, the first leg 31b, the second leg 32b, and the auxiliary leg 40b protrude downward from the bottom surface 16. The first leg 31b, the second leg 32b, and the auxiliary leg 40b have the same protruding length. For example, a solder plating layer (not shown) is formed on the regions of the first leg 31b, the second leg 32b, and the auxiliary leg 40b that protrude from the bottom surface 16.

[0065] In addition, in this embodiment, the length of the conduction path of the second electrode portion 32 is longer than the length of the conduction path of the first electrode portion 31. Figure 3 As shown in (b), in the direction perpendicular to the first side surface 11 (X-axis direction), the length L2a of the second lead portion 32a is longer than the length L1a of the first lead portion 31a. In addition, in the direction perpendicular to the bottom surface 16 (Z-axis direction), the length h2b of the second leg portion 32b is longer than the length h1b of the first leg portion 31b.

[0066] More specifically, in the direction perpendicular to the first side surface 11, the length obtained by subtracting the length L2b of the second leg portion 32b from the length L2a of the second lead portion 32a is longer than the length L1a of the first lead portion 31a ((L2a-L2b)>L1a). In addition, in the direction perpendicular to the bottom surface 16, the length h2b of the second leg portion is longer than the length obtained by adding the length h1b of the first leg portion 31b and the length h1a of the first lead portion 31a (h2b>(h1b+h1a)).

[0067] In addition, the length L1a of the first lead portion 31a is the distance between the portion connected to the one end 20a of the coil portion 20 and the portion closest to the first side surface 11 among the portions connected to the first leg portion 31b. The length L2a of the second lead portion 32a is the distance between the portion connected to the other end 20b of the coil portion 20 and the portion closest to the second side surface 12 among the portions connected to the second leg portion 32b. The length L2b of the second leg portion 32b is the length of the second leg portion 32b in a direction perpendicular to the first side surface 11. In addition, the length h1b of the first leg portion 31b is the distance between the portion connected to the first lead portion 31a and the portion farthest from the first lead portion 31a. The length h2b of the second leg portion 32b is the distance between the portion connected to the second lead portion 32a and the portion farthest from the second lead portion 32a. The length h1a of the first leg portion 31b is the length of the first leg portion 31b in a direction perpendicular to the bottom surface 16.

[0068] In the present embodiment, the coil portion 20 of the inductor 100 is arranged in such a manner that the coil axis Ax intersects the first side surface 11. According to this structure, the coil surface perpendicular to the coil axis Ax can be arranged upright, and the area of ​​the bottom surface 16 of the magnetic core portion 10 can be reduced compared to the case where the coil surface is arranged parallel to the bottom surface 16. Thus, the installation efficiency of the inductor 100 can be improved. In addition, in the present embodiment, the first electrode portion 31 and the second electrode portion 32 are respectively connected to one end 20a and the other end 20b of the coil portion 20 at the third side surface 13, and are arranged along the third side surface 13. According to this structure, the two electrode portions 30 are arranged on one side of the magnetic core portion 10, and the input and output terminals of the inductor 100 can be gathered on one side of the magnetic core portion 10. Thus, the installation efficiency of the inductor 100 can be improved.

[0069] [Inductor Manufacturing Method]

[0070] Next, use the appropriate Figure 4 to Figure 7 A method for manufacturing the inductor 100 will be described.

[0071] Figure 4 1 is a flowchart showing a method for manufacturing the inductor 100 according to the embodiment. Figure 5 This is a diagram showing a metal plate 51 that serves as a material for the coil unit 20 , the electrode unit 30 , and the like. Figure 6 FIG. 5 is a diagram showing a punched conductor plate 52 formed by a punching step. Figure 7 The diagram shows the core portion 10 and the coil portion 20 formed by the core portion forming step. Figure 6 (b) is the main view, Figure 6 (a) is observed from above Figure 6 Figure (b) of .

[0072] like Figure 4 As shown, the method for manufacturing the inductor 100 includes a conductor plate forming step S101 , a magnetic core forming step S102 , and a conductor bending step S103 .

[0073] In the conductor plate forming step S101, Figure 5 The metal plate 51 shown is punched into a prescribed shape to form Figure 6 The punched conductor plate 52 is shown. Specifically, a metal plate 51 having a thickness of 1 mm is punched out by punching and forming, and a region to be the coil portion 20, a region to be the electrode portion 30, and a region to be the auxiliary conductor portion 40 are formed.

[0074] The region that becomes the coil portion 20 has a shape obtained by rotating the U-shape to the left by 90°. The region that becomes the electrode portion 30 is connected to both ends of the coil portion 20 located on the left side of the region that becomes the coil portion 20. In this example, the region that becomes the first electrode portion 31 is connected to one coil lead-out portion 22a of the coil portion 20, and the region that becomes the second electrode portion 32 is connected to the other coil lead-out portion 22b of the coil portion 20.

[0075] The area of ​​the second lead portion 32a that becomes the second electrode portion 32 is formed at a position higher than the area of ​​the first lead portion 31a that becomes the first electrode portion 31 (on the side opposite to the first leg portion 31b when viewed from the first lead portion 31a). The area of ​​the second leg portion 32b that becomes the second electrode portion 32 is formed at a position to the left of the area of ​​the first leg portion 31b that becomes the first electrode portion 31 (on the side opposite to the coil portion 20 when viewed from the first leg portion 31b). The area that becomes the auxiliary conductor portion 40 is connected to the area that becomes the coil portion 20. The area that becomes the auxiliary conductor portion 40 is formed on the right side of the area that becomes the coil portion 20 (on the side opposite to the area that becomes the electrode portion 30 when viewed from the area that becomes the coil portion 20). In this way, the areas that become the coil portion 20, the electrode portion 30, and the auxiliary conductor portion 40 are connected as one conductor plate. In the conductor plate forming step S101, the areas that become the coil portion 20, the electrode portion 30, and the auxiliary conductor portion 40 are formed by a single punching process.

[0076] In the conductor plate forming step S101, a region to be bent in the subsequent bending process is formed. Figure 6 The plurality of depressions 52a shown in FIG. 5 are formed by, for example, pressing a U-shaped tool against the punched conductor plate 52. In this example, the depressions 52a are formed in the thickness direction of the punched conductor plate 52 by pressing the back side of the punched conductor plate 52. The depth of the depressions 52a is, for example, not less than 0.5 mm and not more than 0.7 mm. The depressions 52a may be provided after the punching process or may be formed before the punching process. The depressions 52a may be formed by cutting or by etching.

[0077] In the core forming step S102, the core 10 is formed by press-forming together with the punched conductor plate 52 (see Figure 7 ). In this process, a portion of the punched conductor plate 52 is placed in a mold and covered with a mixture containing magnetic material powder and an adhesive, while another portion of the punched conductor plate 52 is not covered with the magnetic material powder and the adhesive, and the magnetic core portion 10 is formed by stamping. The portion of the punched conductor plate 52 covered with the magnetic core portion 10 becomes the coil portion 20, and the other portion of the punched conductor plate 52 not covered with the magnetic core portion 10 becomes the electrode portion 30 and the auxiliary conductor portion 40. The pressure applied during stamping is, for example, 5 tons / cm 2 , the thermal curing temperature is, for example, 185°C.

[0078] After the core forming step S102, the electrode portion 30 not covered by the core portion 10 protrudes vertically outward from the third side surface 13 of the core portion 10. A portion of the auxiliary conductor portion 40 not covered by the core portion 10 protrudes vertically outward from the fourth side surface 14 of the core portion 10. The length obtained by subtracting the length L2b of the second leg portion 32b from the length L2a of the second lead portion 32a is longer than the length L1a of the first lead portion 31a ((L2a-L2b)>L1a). In addition, the length h2b of the second leg portion is longer than the length obtained by adding the length h1b of the first leg portion 31b and the length h1a of the first lead portion 31a (h2b>(h1b+h1a)).

[0079] In the conductor bending step S103, the electrode portion 30 and the auxiliary conductor portion 40 protruding from the magnetic core portion 10 are bent. The first electrode portion 31 is bent toward the first side surface 11 side along the third side surface 13 from one end 20a of the coil portion 20 as a starting point. The second electrode portion 32 is bent toward the second side surface 12 side along the third side surface 13 from the other end 20b of the coil portion 20 as a starting point. The auxiliary conductor portion 40 is bent toward the second side surface 12 side along the fourth side surface 14 from the other end 40c2 of the embedded portion 40c as a starting point. The first electrode portion 31 and the second electrode portion 32 may be bent at the same time. Alternatively, the second electrode portion 32 and the auxiliary conductor portion 40 may be bent at the same time.

[0080] After the conductor bending step S103 , solder plating or the like is applied to the regions of the first electrode portion 31 , the second electrode portion 32 , and the auxiliary conductor portion 40 that protrude downward from the bottom surface 16 . The inductor 100 is manufactured through these steps.

[0081] [Base module]

[0082] A substrate module 60 including the inductor 100 according to the embodiment will be described.

[0083] Figure 8 FIG. 1 is a diagram showing a substrate module 60 including an inductor 100 according to the embodiment.

[0084] like Figure 8 As shown in FIG. 1 , the substrate module 60 includes an inductor 100, an electronic component 69 different from the inductor 100, and a printed circuit board 61. Figure 8 In the figure, wiring, pad electrodes, and bonding agents such as solder on the printed circuit board 61 are omitted.

[0085] The printed circuit board 61 is a board built into an electric device, etc. A plurality of electronic components 69 are mounted on the printed circuit board 61 .

[0086] The plurality of electronic components 69 are surface-mount electronic components, such as capacitors, resistors, transistors, etc. The plurality of electronic components 69 are mounted on the printed circuit board 61 by solder or the like.

[0087] As described above, the first electrode portion 31, the second electrode portion 32, and the auxiliary conductor portion 40 of the inductor 100 protrude downward from the bottom surface 16, and the inductor 100 is mounted on the printed circuit board 61 so as to cover the plurality of electronic components 69 on the printed circuit board 61. The inductor 100 is placed on the printed circuit board 61 so that the bottom surfaces of the first electrode portion 31, the second electrode portion 32, and the auxiliary conductor portion 40 abut against or are close to the mounting surface 61a of the printed circuit board 61, and are bonded by a bonding agent such as solder (not shown).

[0088] In the substrate module 60, since the first electrode portion 31, the second electrode portion 32, and the auxiliary conductor portion 40 protrude downward from the bottom surface 16, a space is formed between the bottom surface 16 of the core portion 10 and the mounting surface 61a of the printed circuit board 61. A plurality of electronic components 69 are arranged between the bottom surface 16 of the core portion 10 of the inductor 100 and the printed circuit board 61. According to this structure, the mounting density of the substrate module 60 can be increased.

[0089] Fig. 9A This is a diagram showing the inductor 100 , wirings 63 , 64 , and pad electrodes 65 , 66 , 67 , etc., which are provided on the substrate module 60 , as viewed from above. Fig. 9B is a diagram showing another example of the substrate module 60. Fig. 9A and 9B In the figure, bonding agents such as solder are omitted.

[0090] Fig. 9A An example is shown in which the wirings 63 and 64 are formed in parallel with the third side surface 13 of the inductor 100 . Fig. 9B An example is shown in which the wirings 63 and 64 are formed perpendicularly to the third side surface 13 of the inductor 100 .

[0091] The first electrode portion 31 of the inductor 100 is connected to the wiring 63 via the pad electrode 65, and the second electrode portion 32 is connected to the wiring 64 via the pad electrode 66. In the substrate module 60, power or electrical signals are input and output to the first electrode portion 31 and the second electrode portion 32 via the wirings 63 and 64 and the pad electrodes 65 and 66.

[0092] On the other hand, the auxiliary conductor portion 40 of the inductor 100 is bonded to the pad electrode 67, but the wiring is not connected to the pad electrode 67, and the power supply power or electrical signal is not input to the auxiliary conductor portion 40 via the pad electrode 67. Fig. 9A and Fig. 9B In the substrate module 60 shown, there is no need for routing wiring to the pad electrode 67 arranged on the fourth side surface 14 side.

[0093] According to the substrate module 60 , the wirings 63 and 64 can be provided on the third side surface 13 side of the inductor 100 . Thus, the wiring efficiency of the substrate module 60 can be improved.

[0094] [Modification 1 of the embodiment]

[0095] An inductor 100A according to a first modification of the embodiment will be described. In the first modification, an example in which the auxiliary conductor portion 40 is not connected to the coil portion 20 will be described.

[0096] Fig.10 It is a front view of an inductor 100A according to Modification 1 of the embodiment.

[0097] Fig.10 The inductor 100A shown includes a core portion 10, a coil portion 20, and an electrode portion 30. The inductor 100A also includes an auxiliary conductor portion 40 for assisting the posture of the core portion 10. The structures of the core portion 10, the coil portion 20, and the electrode portion 30 are the same as those in the embodiment.

[0098] The auxiliary conductor portion 40 includes an embedded portion 40 c embedded in the core portion 10 , an auxiliary lead portion 40 a connected to the embedded portion 40 c , and an auxiliary leg portion 40 b connected to the auxiliary lead portion 40 a .

[0099] The auxiliary conductor portion 40 of the modification example 1 is formed of a metal member different from the metal member M forming the coil portion 20 and the electrode portion 30. Fig.10 As shown, one end of the embedded portion 40c of Modification 1 is not connected to the coil portion 20, but is embedded in the magnetic core portion 10. That is, the auxiliary conductor portion 40 is not connected to the coil portion 20, and is electrically floating in the inductor 100A. The inductor 100A of Modification 1 also has the same effects as those of the embodiment.

[0100] [Variation 2 of the embodiment]

[0101] An inductor 100B according to a second modification of the embodiment will be described. In the second modification, an example in which the first electrode portion 31 , the second electrode portion 32 , and the auxiliary conductor portion 40 do not protrude downward from the bottom surface 16 but are flush with the bottom surface 16 will be described.

[0102] Fig.11 1 and 2 are a front view, a left side view, and a right side view of an inductor 100B according to a second modification of the embodiment. Fig.11 (a) is the main view, Fig.11 (b) is the left view, Fig.11 (c) is the right view.

[0103] Fig.11 The inductor 100B shown includes a core portion 10, a coil portion 20, and an electrode portion 30. In addition, the inductor 100B includes an auxiliary conductor portion 40 for assisting the posture of the core portion 10. The structures of the core portion 10 and the coil portion 20 are the same as those in the embodiment.

[0104] In the inductor 100B of the second modification, the first electrode portion 31, the second electrode portion 32, and the auxiliary conductor portion 40 are located on the same plane as the bottom surface 16 and do not protrude downward from the bottom surface 16. Therefore, other electronic components 69 cannot be arranged between the bottom surface 16 of the core portion 10 and the printed circuit board 61 as in the embodiment.

[0105] However, even in variant example 2, the coil portion 20 of the inductor 100B is configured in such a way that the coil axis Ax intersects the first side surface 11. According to this structure, the coil surface perpendicular to the coil axis Ax can be arranged upright, and the area of ​​the bottom surface 16 of the core portion 10 can be reduced. Thus, the installation efficiency of the inductor 100B can be improved. In addition, in variant example 2, the first electrode portion 31 and the second electrode portion 32 are also connected to one end 20a and the other end 20b of the coil portion 20 at the third side surface 13, respectively, and are configured along the third side surface 13. According to this structure, the two electrode portions 30 are arranged on one side of the core portion 10, and the input and output terminals of the inductor 100B can be gathered on one side of the core portion 10. Thus, the installation efficiency of the inductor 100B can be improved.

[0106] In Modification 2, an example is shown in which the inductor 100B includes the auxiliary conductor portion 40, but the inductor 100B does not necessarily have to include the auxiliary conductor portion 40. For example, when the magnetic core portion 10 and the electrode portion 30 are mounted on the printed circuit board 61 via a conductive adhesive, the inductor 100B of Modification 2 can stabilize the posture of the magnetic core portion 10 by the conductive adhesive even if the auxiliary conductor portion 40 is not included.

[0107] (Summarize)

[0108] As described above, the inductor 100 of the present embodiment includes the magnetic core 10 including a magnetic material, the coil 20 provided inside the magnetic core 10, and the first electrode 31 and the second electrode 32 arranged outside the magnetic core 10. The magnetic core 10 is in a rectangular parallelepiped shape, and includes the bottom surface 16, the top surface 17 opposite to the bottom surface 16, the first side surface 11 connecting the bottom surface 16 and the top surface 17, the second side surface 12 opposite to the first side surface 11, the third side surface 13 connecting the bottom surface 16 and the top surface 17, and the fourth side surface 14 opposite to the third side surface 13. The coil 20 is arranged so that the coil axis Ax intersects the first side surface 11, and includes one end 20a and the other end 20b located at both ends of the conduction path of the coil 20. The one end 20a and the other end 20b of the coil 20 are in contact with the third side surface 13, and are arranged at a distance from each other on the third side surface 13. The first electrode portion 31 is connected to one end 20a of the coil portion 20 at the third side surface 13 and is arranged along the third side surface 13. The second electrode portion 32 is connected to the other end 20b of the coil portion 20 at the third side surface 13 and is arranged along the third side surface 13.

[0109] In this way, the coil portion 20 of the inductor 100 is arranged in a manner that the coil axis Ax intersects the first side surface 11. According to this structure, the coil surface perpendicular to the coil axis Ax can be arranged upright, and the area of ​​the bottom surface 16 of the core portion 10 can be reduced. As a result, the installation efficiency of the inductor 100 can be improved. In addition, in the inductor 100, the first electrode portion 31 and the second electrode portion 32 are respectively connected to one end 20a and the other end 20b of the coil portion 20 at the third side surface 13, and are arranged along the third side surface 13. According to this structure, two electrode portions are arranged on one side of the core portion 10, and the input and output terminals of the inductor 100 can be gathered on one side of the core portion 10. As a result, the installation efficiency of the inductor 100 can be improved.

[0110] Furthermore, the coil portion 20 may be plate-shaped, and the plane 20 f of the coil portion 20 may be perpendicular to the bottom surface 16 .

[0111] Thus, since the plane 20f of the coil part 20 is perpendicular to the bottom surface 16, the area of ​​the bottom surface 16 of the core part 10 can be reduced compared to the case where the plane 20f of the coil part 20 is arranged parallel to the bottom surface 16. This can improve the mounting efficiency of the inductor 100.

[0112] In addition, the other end 20b of the coil portion 20 is arranged at a position closer to the top surface 17 side than the one end 20a of the coil portion 20. When viewed from a direction perpendicular to the third side surface 13, the first electrode portion 31 is arranged between the one end 20a of the coil portion 20 and the first side surface 11, and the second electrode portion 32 is arranged between the other end 20b of the coil portion 20 and the second side surface 12.

[0113] According to this structure, the first electrode portion 31 and the second electrode portion 32 can be arranged on one side of the core portion 10, and the input and output terminals of the inductor 100 can be gathered on one side of the core portion 10. Thus, the mounting efficiency of the inductor 100 can be improved.

[0114] In addition, the first electrode portion 31 includes a first lead portion 31a extending from one end 20a of the coil portion 20 in a direction close to the first side surface 11, and a first leg portion 31b connected to the first lead portion 31a and extending at least to the same surface as the bottom surface 16. The second electrode portion 32 may also include a second lead portion 32a extending from the other end 20b of the coil portion 20 in a direction close to the second side surface 12, and a second leg portion 32b connected to the second lead portion 32a and extending at least to the same surface as the bottom surface 16.

[0115] According to this structure, the first electrode portion 31 and the second electrode portion 32 can be appropriately arranged on one side of the core portion 10, and the input and output terminals of the inductor 100 can be gathered on one side of the core portion 10. Thus, the mounting efficiency of the inductor 100 can be improved.

[0116] In addition, in a direction perpendicular to the first side surface 11 , a length L2a of the second lead-out portion 32a may be longer than a length L1a of the first lead-out portion 31a .

[0117] According to this structure, the first electrode portion 31 and the second electrode portion 32 can be appropriately arranged on one side of the core portion 10, and the input and output terminals of the inductor 100 can be gathered on one side of the core portion 10. Thus, the mounting efficiency of the inductor 100 can be improved. In addition, according to this structure, the regions to be the first electrode portion 31 and the second electrode portion 32 can be formed at the same time by, for example, punching. Thus, the production efficiency of the inductor 100 can be improved.

[0118] In addition, in the direction perpendicular to the bottom surface 16 , the length h2b of the second leg portion 32b may be longer than the length h1b of the first leg portion 31b .

[0119] According to this structure, the first electrode portion 31 and the second electrode portion 32 can be arranged on one side of the magnetic core portion 10 without contacting each other, and the input and output terminals of the inductor 100 can be gathered on one side of the magnetic core portion 10. As a result, the mounting efficiency of the inductor 100 can be improved. In addition, according to this structure, the regions to be the first electrode portion 31 and the second electrode portion 32 can be formed at the same time by, for example, punching. As a result, the production efficiency of the inductor 100 can be improved.

[0120] In addition, the first electrode portion 31 and the second electrode portion 32 are respectively plate-shaped. The first leg portion 31b is connected to the surface on the bottom surface 16 side of the first lead portion 31a, and the second leg portion 32b is connected to the surface on the bottom surface 16 side of the second lead portion 32a. In the direction perpendicular to the first side surface 11, the length obtained by subtracting the length L2b of the second leg portion 32b from the length L2a of the second lead portion 32a is longer than the length L1a of the first lead portion 31a. In the direction perpendicular to the bottom surface 16, the length h2b of the second leg portion 32b can be longer than the length obtained by adding the length h1b of the first leg portion 31b and the length h1a of the first lead portion.

[0121] According to this structure, the first electrode portion 31 and the second electrode portion 32 can be arranged on one side of the magnetic core portion 10 without contacting each other, and the input and output terminals of the inductor 100 can be gathered on one side of the magnetic core portion 10. As a result, the mounting efficiency of the inductor 100 can be improved. In addition, according to this structure, the regions to be the first electrode portion 31 and the second electrode portion 32 can be formed at the same time by, for example, punching. As a result, the production efficiency of the inductor 100 can be improved.

[0122] In addition, when viewed from the top surface 17 side, the coil portion 20 may be arranged at a position closer to the first side surface 11 than the second side surface 12 .

[0123] According to this structure, the length L2a of the second lead portion 32a can be lengthened compared to the case where the coil portion 20 is arranged between the first side surface 11 and the second side surface 12. Thus, the distance between the first side surface 11 and the second side surface 12 of the core portion 10 can be narrowed, and the area of ​​the bottom surface 16 can be reduced. Thus, the mounting efficiency of the inductor 100 can be improved.

[0124] Furthermore, the inductor 100 may further include an auxiliary conductor portion 40 having a portion protruding outward from the fourth side surface 14 .

[0125] According to this structure, the posture of the inductor 100 can be stabilized. In addition, when the inductor 100 is mounted on a printed circuit board, the connection reliability with respect to the printed circuit board can be ensured.

[0126] Furthermore, the first electrode portion 31 , the second electrode portion 32 , and the auxiliary conductor portion 40 may protrude toward a side opposite to the top surface 17 relative to the bottom surface 16 .

[0127] According to this structure, for example, other electronic components can be arranged on the bottom surface 16 side of the inductor 100. Thus, the mounting efficiency of the inductor 100 can be improved.

[0128] The substrate module 60 of this embodiment includes the inductor 100, an electronic component 69 different from the inductor 100, and a printed circuit board 61. The inductor 100 is mounted on the printed circuit board 61, and the electronic component 69 is disposed between the bottom surface 16 of the core portion 10 of the inductor 100 and the printed circuit board 61.

[0129] In this way, by arranging the electronic component 69 between the bottom surface 16 of the core portion 10 of the inductor 100 and the printed circuit board 61 , it is possible to increase the mounting density of the substrate module 60 .

[0130] The manufacturing method of the inductor 100 of the present embodiment is a manufacturing method of the inductor as follows, which includes: a core portion 10 including a magnetic material; a coil portion 20 arranged inside the core portion 10; and a first electrode portion 31 and a second electrode portion 32 connected to the coil portion 20 and arranged outside the core portion 10. The manufacturing method includes: a process of forming a punched conductor plate 52 by punching a metal plate 51, wherein the punched conductor plate 52 includes an area consisting of a coil portion 20, a first electrode portion 31, and a second electrode portion 32; a process of forming a rectangular core portion 10 having four side surfaces 11 to 14 by covering a portion of the punched conductor plate 52 with a magnetic material, and forming a coil portion 20 having a coil axis Ax intersecting two side surfaces 11 and 12 of the core portion 10; and a process of forming the first electrode portion 31 and the second electrode portion 32 protruding from one side surface 13 of two other side surfaces 13 and 14 different from the two side surfaces 11 and 12 by bending the punched conductor plate 52 that is not covered with the magnetic material and is located outside the core portion 10.

[0131] In this way, by forming the coil portion 20 of the inductor 100 so that the coil axis Ax intersects the first side surface 11, the coil surface perpendicular to the coil axis Ax can be arranged upright, and the area of ​​the bottom surface 16 of the magnetic core portion 10 can be reduced. Thus, the inductor 100 that can improve the installation efficiency can be provided. In addition, since the first electrode portion 31 and the second electrode portion 32 are respectively formed to protrude from one side surface 13, the two electrode portions are arranged on one side surface of the magnetic core portion 10, and the input and output terminals of the inductor 100 can be gathered on one side surface of the magnetic core portion 10. Thus, the inductor 100 that can improve the installation efficiency can be provided.

[0132] (Other Implementations, etc.)

[0133] The inductors and the like of the embodiments and variants of the present disclosure are described above, but the present disclosure is not limited to the above embodiments and variants. Unless departing from the main purpose of the present disclosure, various modifications that can be thought of by those skilled in the art can be implemented on the embodiments and variants, and other forms of components by combining some of the constituent elements in the embodiments and variants are also within the scope of the present disclosure.

[0134] In the above embodiment, the coil part 20 and the electrode part 30 of the metal member M are formed by processing one member made of the same material, but the present invention is not limited thereto. The coil part 20 and the electrode part 30 may be formed by connecting two members made of different materials.

[0135] In the above embodiment, the lead portion and the leg portion of the electrode portion 30 are respectively linear examples, but the present invention is not limited thereto. For example, the lead portion and the leg portion may be respectively curved. For example, the leg portion may be L-shaped or I-shaped.

[0136] In the above embodiment, an example is shown in which the magnetic core portion 10 is composed of one powder magnetic core, but the invention is not limited thereto, and the magnetic core portion 10 may also be composed of two split magnetic cores. That is, the inductor 100 may be composed of the following structure: a magnetic core portion composed of two split magnetic cores; a coil portion 20 sandwiched between the two split magnetic cores; and a first electrode portion 31 and a second electrode portion 32 connected to the coil portion 20.

[0137] In addition, the inductor 100 may have the following features. Hereinafter, features of the inductor described based on the embodiment will be described.

[0138] <Technology 1>

[0139] An inductor, comprising:

[0140] a core portion, comprising magnetic material;

[0141] a coil portion disposed inside the magnetic core portion; and

[0142] The first electrode portion and the second electrode portion are arranged outside the magnetic core portion,

[0143] The magnetic core portion is in a rectangular parallelepiped shape, and has a bottom surface, a top surface opposite to the bottom surface, a first side surface connecting the bottom surface and the top surface, a second side surface opposite to the first side surface, a vertical third side surface connecting the bottom surface and the top surface, and a fourth side surface opposite to the third side surface.

[0144] The coil portion is arranged so that the coil axis intersects the first side surface, and has one end and the other end located at both ends of the conduction path of the coil portion.

[0145] One end and the other end of the coil part are in contact with the third side surface, and are arranged at a distance from each other on the third side surface.

[0146] The first electrode portion is connected to one end of the coil portion on the third side surface and is arranged along the third side surface.

[0147] The second electrode portion is connected to the other end of the coil portion on the third side surface and is arranged along the third side surface.

[0148] <Technology 2>

[0149] The inductor according to technique 1, wherein:

[0150] The coil portion is plate-shaped,

[0151] The plane of the coil portion is perpendicular to the bottom surface.

[0152] <Technology 3>

[0153] The inductor according to technique 1, wherein:

[0154] The other end of the coil portion is arranged on the top surface side relative to the one end of the coil portion,

[0155] Observed from a direction perpendicular to the third side surface,

[0156] The first electrode portion is arranged between one end of the coil portion and the first side surface.

[0157] The second electrode portion is arranged between the other end of the coil portion and the second side surface.

[0158] <Technique 4>

[0159] The inductor according to techniques 1 to 3, wherein:

[0160] The first electrode portion has a first lead portion and a first leg portion, the first lead portion extends from one end of the coil portion toward the first side surface, the first leg portion is connected to the first lead portion and extends to at least the same surface as the bottom surface,

[0161] The second electrode portion has a second lead portion and a second leg portion, the second lead portion extends from the other end of the coil portion toward the second side surface, and the second leg portion is connected to the second lead portion and extends to at least the same surface as the bottom surface.

[0162] <Technique 5>

[0163] The inductor according to technique 4, wherein:

[0164] In a direction perpendicular to the first side surface, a length of the second lead portion is longer than a length of the first lead portion.

[0165] <Technique 6>

[0166] The inductor according to technique 5, wherein:

[0167] In a direction perpendicular to the bottom surface, the length of the second leg portion is longer than that of the first leg portion.

[0168] <Technique 7>

[0169] The inductor according to any one of Techniques 4 to 6, wherein:

[0170] The first electrode portion and the second electrode portion are respectively in the form of plates,

[0171] The first leg portion is connected to a surface on the bottom side of the first lead portion,

[0172] The second leg portion is connected to a surface on the bottom side of the second lead portion,

[0173] In a direction perpendicular to the first side surface, a length obtained by subtracting a length of the second leg portion from a length of the second lead portion is longer than a length of the first lead portion,

[0174] In a direction perpendicular to the bottom surface, the length of the second leg portion is longer than a sum of a length of the first leg portion and a length of the first lead portion.

[0175] <Technology 8>

[0176] The inductor according to any one of techniques 1 to 7, wherein:

[0177] When viewed from the top surface side, the coil portion is arranged closer to the first side surface than to the second side surface.

[0178] <Technique 9>

[0179] The inductor according to any one of techniques 1 to 8, wherein:

[0180] The invention further includes an auxiliary conductor portion having a portion protruding outward from the fourth side surface.

[0181] <Technique 10>

[0182] The inductor according to technique 9, wherein:

[0183] The first electrode portion, the second electrode portion, and the auxiliary conductor portion protrude from the bottom surface toward a side opposite to the top surface.

[0184] <Technology 11>

[0185] A substrate module, comprising:

[0186] The inductor according to technique 10;

[0187] an electronic component, different from the inductor; and

[0188] Printed circuit boards,

[0189] The inductor is mounted on the printed circuit board.

[0190] The electronic component is arranged between the bottom surface of the magnetic core portion of the inductor and the printed circuit board.

[0191] <Technology 12>

[0192] A method for manufacturing an inductor, the inductor comprising: a magnetic core portion including a magnetic material; a coil portion disposed inside the magnetic core portion; and a first electrode portion and a second electrode portion connected to the coil portion and disposed outside the magnetic core portion, the method comprising:

[0193] A step of forming a punched conductor plate by punching a metal plate, wherein the punched conductor plate includes a region formed by the coil portion, the first electrode portion, and the second electrode portion;

[0194] The step of forming the magnetic core portion by covering a portion of the punched conductor plate with a magnetic material and forming the coil portion, the magnetic core portion being a rectangular parallelepiped magnetic core portion having four sides, the coil portion having a coil axis intersecting two sides of the magnetic core portion;

[0195] The step of forming the first electrode portion and the second electrode portion by bending the punched conductor plate that is not covered by the magnetic material and is located outside the magnetic core portion, the first electrode portion and the second electrode portion protruding from one of two other side surfaces different from the two side surfaces.

[0196] In addition, for example, an electrical product or circuit using the above-mentioned inductor is also included in the present disclosure. As the electrical product, there can be mentioned a power supply device including the above-mentioned inductor, various devices including the power supply device, and the like.

[0197] Industrial Applicability

[0198] The inductor disclosed herein is useful as an inductor used in various devices and equipment.

[0199] Description of Reference Numerals

[0200] 10 Magnetic core

[0201] 11 First side

[0202] 12 Second side

[0203] 13 The third side

[0204] 14 The fourth side

[0205] 16 bottom

[0206] 17 Top

[0207] 20 Coil unit

[0208] 20a end

[0209] 20bThe other end

[0210] 20f plane

[0211] 21 Coil body

[0212] 22a, 22b coil lead-out portion

[0213] 30 Electrode

[0214] 31 first electrode part

[0215] 31a First lead-out portion

[0216] 31b First leg

[0217] 32 second electrode portion

[0218] 32a Second lead-out portion

[0219] 32b Second leg

[0220] 40 auxiliary conductor part

[0221] 40a Auxiliary lead-out section

[0222] 40b auxiliary leg

[0223] 40c buried part

[0224] 40c2 other end

[0225] 51 Metal Plate

[0226] 52 Punching conductor plate

[0227] 52a Depression

[0228] 60 baseboard module

[0229] 61 Printed circuit board

[0230] 61a Mounting surface

[0231] 63, 64 wiring

[0232] 65, 66, 67 grounding electrode

[0233] 69 Electronic components

[0234] 100, 100A, 100B Inductors

[0235] Ax Coil axis

[0236] h1a, h1b, h2b, L1a, L2a, L2b length

[0237] MMetal Components

Claims

1. An inductor, wherein: have: a core portion, comprising magnetic material; a coil portion disposed inside the magnetic core portion; and The first electrode portion and the second electrode portion are arranged outside the magnetic core portion, The magnetic core portion is in a rectangular parallelepiped shape, and has a bottom surface, a top surface opposite to the bottom surface, a first side surface connecting the bottom surface and the top surface, a second side surface opposite to the first side surface, a vertical third side surface connecting the bottom surface and the top surface, and a fourth side surface opposite to the third side surface. The coil portion is arranged so that the coil axis intersects the first side surface, and has one end and the other end located at both ends of the conduction path of the coil portion. One end and the other end of the coil part are in contact with the third side surface, and are arranged at a distance from each other on the third side surface. The first electrode portion is connected to one end of the coil portion on the third side surface and is arranged along the third side surface. The second electrode portion is connected to the other end of the coil portion on the third side surface and is arranged along the third side surface.

2. The inductor according to claim 1, wherein The coil portion is plate-shaped, The plane of the coil portion is perpendicular to the bottom surface.

3. The inductor according to claim 1, wherein: The other end of the coil portion is arranged on the top surface side relative to the one end of the coil portion. Observed from a direction perpendicular to the third side surface, The first electrode portion is arranged between one end of the coil portion and the first side surface. The second electrode portion is arranged between the other end of the coil portion and the second side surface.

4. The inductor according to claim 3, wherein: The first electrode portion has a first lead portion and a first leg portion, the first lead portion extends from one end of the coil portion toward the first side surface, the first leg portion is connected to the first lead portion and extends to at least the same surface as the bottom surface, The second electrode portion has a second lead portion and a second leg portion, the second lead portion extends from the other end of the coil portion toward the second side surface, and the second leg portion is connected to the second lead portion and extends to at least the same surface as the bottom surface.

5. The inductor according to claim 4, wherein: In a direction perpendicular to the first side surface, a length of the second lead portion is longer than a length of the first lead portion.

6. The inductor according to claim 5, wherein: In a direction perpendicular to the bottom surface, the length of the second leg portion is longer than that of the first leg portion.

7. The inductor according to claim 4, wherein: The first electrode portion and the second electrode portion are respectively in the form of plates, The first leg portion is connected to a surface on the bottom side of the first lead portion, The second leg portion is connected to a surface on the bottom side of the second lead portion, In a direction perpendicular to the first side surface, a length obtained by subtracting a length of the second leg portion from a length of the second lead portion is longer than a length of the first lead portion, In a direction perpendicular to the bottom surface, the length of the second leg portion is longer than a sum of a length of the first leg portion and a length of the first lead portion.

8. The inductor according to any one of claims 1 to 7, wherein: When viewed from the top surface side, the coil portion is arranged closer to the first side surface than to the second side surface.

9. The inductor according to any one of claims 1 to 7, wherein: The invention further includes an auxiliary conductor portion having a portion protruding outward from the fourth side surface.

10. The inductor according to claim 9, wherein The first electrode portion, the second electrode portion, and the auxiliary conductor portion protrude from the bottom surface toward a side opposite to the top surface.

11. A substrate module, wherein: have: The inductor according to claim 10; an electronic component, different from the inductor; and Printed circuit boards, The inductor is mounted on the printed circuit board. The electronic component is arranged between the bottom surface of the magnetic core portion of the inductor and the printed circuit board.

12. A method for manufacturing an inductor, the inductor comprising: a magnetic core portion including a magnetic material; a coil portion disposed inside the magnetic core portion; and a first electrode portion and a second electrode portion connected to the coil portion and disposed outside the magnetic core portion, the method comprising: a step of forming a punched conductor plate by punching a metal plate, the punched conductor plate including a region consisting of the coil portion, the first electrode portion, and the second electrode portion; The step of forming the magnetic core portion by covering a portion of the punched conductor plate with a magnetic material and forming the coil portion, the magnetic core portion being a rectangular parallelepiped magnetic core portion having four sides, the coil portion having a coil axis intersecting two sides of the magnetic core portion; The step of forming the first electrode portion and the second electrode portion by bending the punched conductor plate that is not covered by the magnetic material and is located outside the magnetic core portion, the first electrode portion and the second electrode portion protruding from one of two other side surfaces different from the two side surfaces.

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