inductor

Abstract

The present invention relates to an inductor. Influence on characteristics of the inductor due to shielding of magnetic flux by a conduction conductor is suppressed. An inductor (11) in which a plurality of conduction conductors include long strip conduction conductors (24) of long strip shape extending along a wire conductor (23), the long strip conduction conductors (24) include curved conduction conductors (24) of curved shape.

Description

TECHNICAL FIELD

[0001] The present application relates to an inductor, and particularly relates to an inductor in which a coil is arranged inside a component body made of a non-conductive material. BACKGROUND

[0002] An inductor of interest in the present application has a component body having a laminated structure in which a plurality of non-conductive material layers are laminated. Inside the component body, a coil is arranged. The coil is configured with a plurality of line conductors extending along interfaces between the non-conductive material layers, respectively, and a plurality of through conductors penetrating the non-conductive material layers in a thickness direction, and by alternately connecting the line conductors and the through conductors, the whole becomes a pattern extending along a spiral track.

[0003] In FIG. 32 , an inductor 1 is schematically illustrated. In FIG. 32 , the component body 2 provided in the inductor 1 and the coil 3 arranged inside the component body 2 are illustrated in a state seen in the axial direction of the coil 3 (a direction orthogonal to the paper surface). FIG. 32

[0004] The component body 2 has a laminated structure extending in the direction of the paper surface, and the laminated structure is made by laminating a plurality of non-conductive material layers. The coil 3 is configured with a plurality of line conductors 4 extending along interfaces between the non-conductive material layers, respectively, and a plurality of through conductors 5 penetrating the non-conductive material layers in a thickness direction, and by alternately connecting the line conductors 4 and the through conductors 5, the whole becomes a pattern extending along a spiral track. On the outer surface of the component body 2, a first external terminal electrode 6 and a second external terminal electrode 7 are provided, which are connected to one end and the other end of the coil 3, respectively. FIG. 32

[0005] With reference to FIG. 32 The connection of the plurality of line conductors 4 in the coil 3 is described more specifically. In order to distinguish the four through conductors 5 illustrated from each other, the four through conductors 5 are labeled with reference numerals "5-1", "5-2", "5-3", "5-4", respectively. In addition, five line conductors 4 connected via the four through conductors 5-1, 5-2, 5-3, and 5-4 are labeled with reference numerals "4-1", "4-2", "4-3", "4-4", "4-5", respectively. The line conductors 4-1, 4-2, 4-3, 4-4, and 4-5 are provided to extend along different interfaces between the non-conductive material layers, respectively, but the interface where the line conductor 4-1 is provided, the interface where the line conductor 4-2 is provided, the interface where the line conductor 4-3 is provided, the interface where the line conductor 4-4 is provided, and the interface where the line conductor 4-5 is provided are arranged in the laminating direction of the non-conductive material layers.

[0006] ​​A wire conductor 4-1, connected to the first external terminal electrode 6 via the first lead conductor 8, extends clockwise to the position of the conducting conductor 5-1. The conducting conductor 5-1 connects wire conductor 4-1 and wire conductor 4-2. Wire conductor 4-2 extends clockwise from the position of the conducting conductor 5-1 to the position of the conducting conductor 5-2. The conducting conductor 5-2 connects wire conductor 4-2 and wire conductor 4-3. Wire conductor 4-3 extends clockwise from the position of the conducting conductor 5-2 to the position of the conducting conductor 5-3. The conducting conductor 5-3 connects wire conductor 4-3 and wire conductor 4-4. Wire conductor 4-4 extends clockwise from the position of the conducting conductor 5-3 to the position of the conducting conductor 5-4. The conducting conductor 5-4 connects wire conductor 4-4 and wire conductor 4-5. Wire conductor 4-5 extends clockwise from the position of the conducting conductor 5-4 and connects to the second external terminal electrode 7 via the second lead conductor 9.

[0007] At the ends of each conductor 4 that connect to each conductive conductor 5, a pad portion 10 is provided. The pad portion 10 typically has an area wider than the cross-sectional area of ​​the conductive conductor 5 to ensure reliable connection between the conductor 4 and the conductive conductor 5. In addition, the conductive conductor 5 has a circular cross-section, wherein the diameter of the circle is larger than the linewidth of the conductor 4.

[0008] For example, Japanese Patent Application Publication No. 2018-184582 (Patent Document 1) describes an inductor 1 in which the cross-section of the conducting conductor 5 is a circle with a diameter greater than the line width of the wire conductor 4, and the pad portion 10 is a shape that is wider than the cross-sectional area of ​​the conducting conductor 5 and is concentric with the cross-section of the conducting conductor 5.

[0009] Patent Document 1: Japanese Patent Application Publication No. 2018-184582

[0010] In practical use FIG. 32 When the inductor 1 is shown, in the region R surrounded by a spiral track formed by multiple conductors 4, the magnetic flux and FIG. 32 The paper passes orthogonally through. On the other hand, in the aforementioned region R, a portion of the conductive conductor 5 and a portion of the pad portion 10 protrude from the inner circumferential side of the wire conductor 4.

[0011] It has recently been discovered that in this state, the conducting conductor 5 and the pad portion 10 block the magnetic flux, thereby affecting the characteristics of the inductor 1, especially the Q value. Summary of the Invention

[0012] Therefore, the object of the present invention is to provide an inductor that can solve the above-mentioned problems.

[0013] The inductor of one embodiment includes a component main body composed of a non-conductive material, and a coil disposed inside the component main body and having a plurality of wire conductors and a plurality of through conductors, wherein the plurality of wire conductors each extend along a main surface of the component main body, the plurality of through conductors each extend perpendicularly to the main surface of the component main body, and the coil has a spiral shape by connecting the wire conductors and the through conductors.

[0014] In the inductor described above, the plurality of through conductors include long strip-shaped long strip through conductors which extend along the wire conductors. In the inductor described above, the long strip through conductors include curved through conductors which have a curved shape.

[0015] In the inductor of one embodiment described above, the through conductors can reduce or not protrude toward the inner circumferential side of the wire conductors. Thus, the through conductors can reduce or eliminate the shielding of magnetic flux, and the influence of the through conductors on the characteristics of the inductor, particularly on the Q value, can be suppressed.

[0016] In the inductor of one embodiment described above, the influence of processing deviation in a lamination process for obtaining the component main body and an exposure process for forming the wire conductors and the through conductors can be reduced because the curved through conductors are included. Thus, the connection reliability of the wire conductors and the through conductors can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a perspective view of the appearance of the inductor 11.

[0018] FIG. 2 is a view of the inductor 11 illustrated in FIG. 1, which is a perspective view of the inductor 11. FIG. 1

[0019] FIG. 3 is a view of the inductor 11 illustrated in FIG. 1, which is a view of a portion of the inductor 11 and is a cross-sectional view of the non-conductive material layer 19-2 provided with the through conductor 24-1 connected to the wire conductor 23-1. FIG. 2

[0020] FIG. 4 is a view of the inductor 11 illustrated in FIG. 1, which is a view of a portion of the inductor 11 and is a top view of the non-conductive material layer 19-2 provided with the wire conductor 23-2 connected to the through conductor 24-1. FIG. 2

[0021] FIG. 5 is a view of the inductor 11 illustrated in FIG. 1, which is a view of a portion of the inductor 11 and is a top view of the non-conductive material layer 19-2 provided with the wire conductor 23-2 connected to the through conductor 24-1. FIG. 2

[0022] FIG. 6 ​​​​It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-3 provided with a conductive conductor 24-2 connected to the line conductor 23-2.

[0023] FIG. 7 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-3 provided with a wire conductor 23-3 connected to the conducting conductor 24-2.

[0024] FIG. 8 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-4 provided with a conductive conductor 24-3 connected to the line conductor 23-3.

[0025] FIG. 9 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-4 provided with a wire conductor 23-4 connected to the conducting conductor 24-3.

[0026] FIG. 10 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-5 provided with a conductive conductor 24-4 connected to the line conductor 23-4.

[0027] FIG. 11 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-5 provided with a line conductor 23-5 connected to the conducting conductor 24-4.

[0028] FIG. 12 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-6 provided with a conductive conductor 24-5 connected to the line conductor 23-5.

[0029] FIG. 13 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-6 provided with a wire conductor 23-6 connected to the conducting conductor 24-5.

[0030] FIG. 14 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-7 provided with a conductive conductor 24-6 connected to the line conductor 23-6.

[0031] FIG. 15 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-7 provided with a wire conductor 23-7 connected to the conducting conductor 24-6.

[0032] FIG. 16 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-8 provided with a conductive conductor 24-7 connected to the line conductor 23-7.

[0033] FIG. 17 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-8 provided with a wire conductor 23-8 connected to the conducting conductor 24-7.

[0034] FIG. 18 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-9 provided with a conductive conductor 24-8 connected to the line conductor 23-8.

[0035] FIG. 19 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-9 provided with a wire conductor 23-9 connected to the conducting conductor 24-8.

[0036] FIG. 20 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-10 provided with a conductive conductor 24-9 connected to the line conductor 23-9.

[0037] FIG. 21 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a top view showing a non-conductive material layer 19-10 provided with a wire conductor 23-10 connected to the conducting conductor 24-9.

[0038] FIG. 22 It means FIG. 2 The diagram shows a portion of the inductor 11, and is a cross-sectional view showing a non-conductive material layer 19-11 provided with a conductive conductor 24-10 connected to the line conductor 23-10.

[0039] FIG. 23 It means FIG. 2is a plan view showing the non-conductive material layer 19-10 provided with the wire conductor 23-11 connected with the through conductor 24-10 and providing the second end portion 22 of the coil 20.

[0040] FIG. 24 is a diagram schematically showing the state of the displacement of the wire conductor 23 and the through conductor 24 in the case where the through conductor 24 extends straight (A) and the case where the through conductor 24 extends bent (B).

[0041] FIG. 25 is a diagram for explaining the bending angle of the bent through conductor.

[0042] FIG. 26 is a diagram showing the inductor 11a corresponding to FIG. 2 .

[0043] FIG. 27 is a diagram showing the inductor 11b corresponding to FIG. 2 .

[0044] FIG. 28 is a diagram showing the inductor 11c corresponding to FIG. 2 .

[0045] FIG. 29 is a diagram showing the inductor 11d corresponding to FIG. 2 .

[0046] FIG. 30 is a diagram showing the inductor 11e corresponding to FIG. 2 .

[0047] FIG. 31 is a diagram showing the inductor 11f corresponding to FIG. 2 .

[0048] FIG. 32 is a diagram showing the inductor 1 in perspective in the axial direction of the coil 3.

[0049] BRIEF DESCRIPTION OF DRAWINGS

[0050] 11, 11a-11f... inductor; 12... component main body; 19... non-conductive material layer; 20, 20a-20f... coil; 23... wire conductor; 23S... short side portion; 23L... long side portion; 24, 24a, 24b... through conductor; 31-36... corner portion; 37... short side; 38... long side; θ1, θ2... bending angle; Ba, Bb, B1-B6... bent portion DETAILED DESCRIPTION

[0051] Referring toFIGS. 1-25 The inductor 11 of the first embodiment of the present invention will be described.

[0052] The inductor 11 includes a component body 12. The component body 12 is made of, for example, a non-conductive material comprising at least one of glass, resin, and ferrite. Alternatively, when the component body 12 is made of a molded body such as resin, it may contain non-magnetic fillers such as silicon dioxide, or magnetic fillers such as ferrite or metallic magnetic materials. Furthermore, it may be a structure composed of multiple materials such as glass, ferrite, and resin. The component body 12 has a cubic shape. The cubic shape may, for example, have rounded or chamfered edges and corners.

[0053] More specifically, such as FIG. 1 As shown, the cubic-shaped component body 12 has a mounting surface 13 facing the mounting substrate side, a top surface 14 opposite to the mounting surface 13, a first side surface 15 and a second side surface 16 connecting the mounting surface 13 and the top surface 14 and opposing each other, and a first end surface 17 and a second end surface 18 connecting the mounting surface 13 and the top surface 14 and the first side surface 15 and the second side surface 16 and opposing each other.

[0054] The main body 12 of the component has a stacked structure, which is formed by stacking multiple non-conductive material layers 19 made of the aforementioned non-conductive material. The multiple non-conductive material layers 19 are stacked from a first side 15 toward a second side 16, and the main surfaces of the non-conductive material layers 19 located at each end in the stacking direction respectively provide the first side 15 and the second side 16 of the main body 12. That is, the first side 15 and the second side 16 are examples of the main surfaces of the main body 12.

[0055] like FIG. 2As shown, the coil 20 is arranged inside the component body 12. The coil 20 has a spiral-shaped track. The axis of the spiral-shaped track of the coil 20 is oriented in a direction orthogonal to the side surface 15 and the side surface 16, that is, in a direction parallel to the mounting surface 13. That is, the axis direction of the coil 20 is a direction parallel to the mounting surface 13, and is a direction orthogonal to the first side surface 15 and the second side surface 16. The coil 20 has a first end portion 21 and a second end portion 22 opposite to each other, and has a plurality of wire conductors 23 extending along an interface of any one of the plurality of non-conductive material layers 19, that is, along the first side surface 15 and the second side surface 16, respectively, and a plurality of via conductors 24 penetrating any one of the non-conductive material layers 19 in the thickness direction, that is, extending perpendicularly to the first side surface 15 and the second side surface 16, respectively, between the first end portion 21 and the second end portion 22. In the coil 20, the spiral-shaped track is formed by alternately connecting the wire conductors 23 and the via conductors 24. The plurality of wire conductors 23 have pad portions 25 connected to the via conductors 24 at respective end portions.

[0056] As shown, when viewed in the axis direction of the coil 20, a direction orthogonal to the direction in which the wire conductors 23 and the pad portions 25 extend is taken as the width direction of the wire conductors 23 and the pad portions 25. In the present embodiment, the width direction dimension of the wire conductors 23 is maintained as the width direction dimension of the pad portions 25, and the width direction dimension of the via conductors 24 is almost equal to the width direction dimension of the wire conductors 23. FIG. 2

[0057] The first external terminal electrode 26 and the second external terminal electrode 27 are provided on the outer surface of the component body 12, and are connected to the first end portion 21 and the second end portion 22 of the coil 20, respectively. The first external terminal electrode 26 and the second external terminal electrode 27 are provided so as to extend over the mounting surface 13 and each of the first end surface 17 and the second end surface 18 adjacent to the mounting surface 13 of the component body 12. If the first external terminal electrode 26 and the second external terminal electrode 27 are provided in this way, when the inductor 11 is mounted on a mounting substrate, a solder fillet of an appropriate form can be formed, and thus a mounting state with high reliability in both electrical connection and mechanical engagement can be obtained. The first external terminal electrode 26 and the second external terminal electrode 27 are provided so as to penetrate in the thickness direction of each of the plurality of non-conductive material layers 19 except for the several non-conductive material layers 19 at both end portions in the stacking direction.

[0058] ​The coil 20 and the external terminal electrodes 26 and 27 are formed, for example, by patterning a conductor film composed of a conductive paste containing silver as a conductive component. In addition, the non-conductive material layer 19 is formed, for example, by patterning a non-conductive material film composed of a paste containing a non-conductive material, as necessary, wherein the non-conductive material contains at least one of glass, resin, and ferrite. In the patterning of the conductor film and the patterning of the non-conductive material film, for example, photolithography, semi-additive method, screen printing method, transfer method, and the like are applied.

[0059] Although not illustrated, a plated film can also be formed on the portions of the external terminal electrodes 26 and 27 that are exposed from the component main body 12. The plated film contains, for example, a Ni plating layer and a Sn plating layer on the Ni plating layer.

[0060] The through conductors 24 contain long strip-shaped long strip through conductors that extend along the line conductors 23. In the present embodiment, all of the illustrated through conductors 24 are long strip through conductors. In addition, in the present embodiment, all of the long strip through conductors are curved through conductors that extend in a curved manner, i.e., in a curved line shape.

[0061] Here, if the relationships of the "through conductor", the "long strip through conductor", and the "curved through conductor" are confirmed, the "through conductor" is a superordinate concept of the "long strip through conductor", and the "long strip through conductor" is a superordinate concept of the "curved through conductor". Therefore, when referred to as the "curved through conductor", it is also the "long strip through conductor", and also the "through conductor". In addition, when it is the "long strip through conductor" but not the "curved through conductor", it is referred to as the "long strip through conductor".

[0062] Mainly referring to FIGS. 3-23 The connection of the plurality of line conductors 23 in the coil 20 is described more specifically.

[0063] In order to distinguish the plurality of through conductors 24 from each other, the numbers "-1", "-2",... are added at the end of the respective reference numerals of the through conductors 24. In FIG. 2 In the present embodiment, the curved through conductor 24-1, the curved through conductor 24-2, the curved through conductor 24-3,... are illustrated in an arrangement in the counterclockwise direction.

[0064] Furthermore, the multiple wire conductors 23 connected by each of the multiple conductive conductors 24 are respectively labeled "23-1", "23-2", "23-3", ... with reference to the attached drawing. The wire conductors 23-1, 23-2, 23-3, ... are respectively arranged to extend along different interfaces between the non-conductive material layers 19. More specifically, they are arranged in the stacking direction of the non-conductive material layers 19 in the order of the interface where wire conductor 23-1 is set, the interface where wire conductor 23-2 is set, the interface where wire conductor 23-3 is set, ...

[0065] Additionally, the pads 25 provided at the respective ends of the conductors 23-1, 23-2, 23-3, ... are labeled "25-1", "25-2", "25-3", ... with reference to the attached drawing.

[0066] Additionally, refer to the attached drawing for the labeling of the non-conductive material layers 19 on the main surface, which are respectively provided with wire conductors 23-1, 23-2, 23-3, ... . The non-conductive material layers 19-1, 19-2, 19-3, ... are stacked sequentially from bottom to top.

[0067] A first lead conductor 28 and a second lead conductor 29 are connected to the first end 21 and the second end 22 of the coil 20, respectively. These first lead conductors 28 and second lead conductors 29 are provided by extensions of wire conductors 23-1 and 23-11 located at the first end 21 and the second end 22 of the coil 20, respectively.

[0068] Furthermore, in this specification, the terms "wire conductor," "lead conductor," and "external terminal electrode" are defined and distinguished from each other as follows: "wire conductor" refers to the portion wound in a view along the axial direction of the coil; "lead conductor" refers to the portion extending away from the wound portion; and "external terminal electrode" refers to the portion exposed from the main body of the component.

[0069] First, such as FIG. 3 As shown, on the non-conductive material layer 19-1, the wire conductor 23-1, which is connected to the first external terminal electrode 26 via the first lead conductor 28, extends clockwise to the pad portion 25-1.

[0070] Next, FIG. 4 The non-conductive material layer 19-2 shown is stacked on top of the non-conductive material layer 19-1. A bent conductive conductor 24-1 is provided to penetrate the non-conductive material layer 19-2. The bent conductive conductor 24-1 is connected to the wire conductor 23-1 via the pad portion 25-1. FIG. 5 The wire conductor shown is 23-2.

[0071] Next, as FIG. 5As shown, on the non-conductive material layer 19-2, the wire conductor 23-2 extends clockwise from the position of the bent conductive conductor 24-1 to the pad portion 25-2.

[0072] Next, FIG. 6 The non-conductive material layer 19-3 shown is stacked on top of the non-conductive material layer 19-2. A bent conductive conductor 24-2 is provided to penetrate the non-conductive material layer 19-3. The bent conductive conductor 24-2 is connected to the wire conductor 23-2 via the pad portion 25-2. FIG. 7 The line conductor 23-3 is shown.

[0073] Next, as FIG. 7 As shown, on the non-conductive material layer 19-3, the wire conductor 23-3 extends clockwise from the position of the bent conductive conductor 24-2 to the pad portion 25-3.

[0074] Next, FIG. 8 The non-conductive material layer 19-4 shown is stacked on top of the non-conductive material layer 19-3. A bent conductive conductor 24-3 is provided to penetrate the non-conductive material layer 19-4. The bent conductive conductor 24-3 is connected to the wire conductor 23-3 via the pad portion 25-3. FIG. 9 The wire conductor shown is 23-4.

[0075] Next, as FIG. 9 As shown, on the non-conductive material layer 19-4, the wire conductor 23-4 extends clockwise from the position of the bent conductive conductor 24-3 to the pad portion 25-4.

[0076] Next, FIG. 10 The non-conductive material layer 19-5 shown is stacked on top of the non-conductive material layer 19-4. A bent conductive conductor 24-4 is provided to penetrate the non-conductive material layer 19-5. The bent conductive conductor 24-4 is connected to the wire conductor 23-4 via the pad portion 25-4. FIG. 11 The wire conductor shown is 23-5.

[0077] Next, as FIG. 11 As shown, on the non-conductive material layer 19-5, the wire conductor 23-5 extends clockwise from the position of the bent conductive conductor 24-4 to the pad portion 25-5.

[0078] Next, FIG. 12 The non-conductive material layer 19-6 shown is stacked on top of the non-conductive material layer 19-5. A bent conductive conductor 24-5 is provided to penetrate the non-conductive material layer 19-6. The bent conductive conductor 24-5 is connected to the wire conductor 23-5 via the pad portion 25-5. FIG. 13 The wire conductor shown is 23-6.

[0079] Next, as FIG. 13 As shown, on the non-conductive material layer 19-6, the wire conductor 23-6 extends clockwise from the position of the bent conductive conductor 24-5 to the pad portion 25-6.

[0080] Next, FIG. 14 The non-conductive material layer 19-7 shown is stacked on top of the non-conductive material layer 19-6. A bent conductive conductor 24-6 is provided to penetrate the non-conductive material layer 19-7. The bent conductive conductor 24-6 connects to the wire conductor 23-6 via the pad portion 25-6. FIG. 15 The wire conductor shown is 23-7.

[0081] Next, as FIG. 15 As shown, on the non-conductive material layer 19-7, the wire conductor 23-7 extends clockwise from the position of the bent conductive conductor 24-6 to the pad portion 25-7.

[0082] Next, FIG. 16 The non-conductive material layer 19-8 shown is stacked on top of the non-conductive material layer 19-7. A bent conductive conductor 24-7 is provided to penetrate the non-conductive material layer 19-8. The bent conductive conductor 24-7 is connected to the wire conductor 23-7 via the pad portion 25-7. FIG. 17 The wire conductor shown is 23-8.

[0083] Next, as FIG. 17 As shown, on the non-conductive material layer 19-8, the wire conductor 23-8 extends clockwise from the position of the bent conductive conductor 24-7 to the pad portion 25-8.

[0084] Next, FIG. 18 The non-conductive material layer 19-9 shown is stacked on top of the non-conductive material layer 19-8. A bent conductive conductor 24-8 is provided to penetrate the non-conductive material layer 19-9. The bent conductive conductor 24-8 is connected to the wire conductor 23-8 via the pad portion 25-8. FIG. 19 The wire conductor shown is 23-9.

[0085] Next, as FIG. 19 As shown, on the non-conductive material layer 19-9, the wire conductor 23-9 extends clockwise from the position of the bent conductive conductor 24-8 to the pad portion 25-9.

[0086] Next, FIG. 20 The non-conductive material layer 19-10 shown is stacked on top of the non-conductive material layer 19-9. A bent conductive conductor 24-9 is provided to penetrate the non-conductive material layer 19-10. The bent conductive conductor 24-9 connects to the wire conductor 23-9 via the pad portion 25-9. FIG. 21 The wire conductor shown is 23-10.

[0087] Next, as FIG. 21 As shown, on the non-conductive material layer 19-10, the wire conductor 23-10 extends clockwise from the position of the bent conductive conductor 24-9 to the pad portion 25-10.

[0088] Next, FIG. 22 The non-conductive material layer 19-11 shown is stacked on top of the non-conductive material layer 19-10. A bent conductive conductor 24-10 is provided to penetrate the non-conductive material layer 19-11. The bent conductive conductor 24-10 connects to the wire conductor 23-10 via the pad portion 25-10. FIG. 23 The wire conductor shown is 23-11.

[0089] Next, as FIG. 23 As shown, on the non-conductive material layer 19-11, the wire conductor 23-11 extends clockwise from the position of the bent conductive conductor 24-10 and is connected to the second external terminal electrode 27 via the second lead conductor 29.

[0090] According to the first embodiment, since the conducting conductor 24 has an elongated shape, it is easy to prevent the conducting conductor 24 from protruding into the inner periphery of the conductor 23 when viewed in the direction of the axial direction of the coil 20. Therefore, concerns about the conducting conductor 24 blocking the magnetic flux are reduced, and the influence of the conducting conductor 24 on the characteristics of the inductor, especially on the Q value, can be suppressed.

[0091] Furthermore, since the conductive conductor 24 has a curved, elongated shape, the effects of processing deviations in the lamination process for obtaining the component body 12 and the exposure process for forming the wire conductor 23 and the conductive conductor 24 can be reduced. Therefore, the connection reliability between the wire conductor 23 and the conductive conductor 24 can be improved. Hereinafter, refer to... FIG. 24 To provide a more specific explanation of the situation.

[0092] FIG. 24 This diagram schematically illustrates a comparison of the offset of the conductor 23 from the conductor 24 when (A) the conductor 24 extends without bending, and the offset of the conductor 23 from the conductor 24 when (B) the conductor 24 extends with bending. FIG. 24 In this context, the so-called "Y-direction offset" refers to the offset in the long side direction of the unbent conductive conductor 24, and the so-called "X-direction offset" refers to the offset in the width direction of the unbent conductive conductor 24.

[0093] First, such as FIG. 24(A) shown, in the case where the through conductor 24 extends straight, in the "no offset" and the "offset in the Y direction", the wire conductor 23 and the through conductor 24 are in contact with each other in the entire region of the through conductor 24, and the connection state is maintained, but in the "offset in the X direction", the wire conductor 23 and the through conductor 24 are separated from each other, and the connection state is not maintained. Further, in the case where the "offset in the X direction" is relatively small, there can be a case where the wire conductor 23 and the through conductor 24 are in contact with each other in a part of the through conductor 24, but it is difficult to say that it is a connection state with high reliability. In any case, it is known that the offset in the width direction of the through conductor 24, that is, the "offset in the X direction" has a large influence on the connection state.

[0094] On the other hand, as shown in FIG. 24 (B) shown, in the case where the through conductor 24 extends straight, in the "no offset" and the "offset in the Y direction", the wire conductor 23 and the through conductor 24 are in contact with each other in the entire region of the through conductor 24, and the connection state is maintained, but in the "offset in the X direction", the wire conductor 23 and the through conductor 24 are separated from each other, and the connection state is not maintained. Further, in the case where the "offset in the X direction" is relatively small, there can be a case where the wire conductor 23 and the through conductor 24 are in contact with each other in a part of the through conductor 24, but it is difficult to say that it is a connection state with high reliability. In any case, it is known that the offset in the width direction of the through conductor 24, that is, the "offset in the X direction" has a large influence on the connection state.

[0095] Further, since FIG. 24 The curved through conductor 24 shown in FIG. 25 The angles θ1, θ2 described later) is 90 degrees, the connection state with high reliability can be maintained for any one of the two directions of offset, that is, the "offset in the X direction" and the "offset in the Y direction". However, even if the bending angle of the curved through conductor is other than 90 degrees, the effect of maintaining the connection state with respect to the "offset" can be exerted. That is, in general, for any one of the two directions of offset along the directions in which the curved portions of the curved through conductor extend to both sides, respectively, the connection state with high reliability can be maintained.

[0096] Thus, if the through conductor 24 has a long shape extending in a curved manner, the influence of the processing deviation in the lamination process and the exposure process, and the like can be reduced, and the connection reliability of the wire conductor 23 and the through conductor 24 can be improved.

[0097] Further, the long through conductor including the curved through conductor has a long shape extending along the wire conductor. If the observation method is changed, the wire conductor in contact with the curved through conductor also extends in a curved manner in the portion in contact with the curved through conductor. Therefore, the curved through conductor has an advantage that it is easy to increase the contact area with the wire conductor extending in a curved manner.

[0098] In the first embodiment, as shown in FIG. 2 the spiral-shaped track formed by the plurality of connections of the line conductor 23 has corner portions 31, 32, 33, 34, 35, and 36 that form angles, and the bent feed conductor 24 is located at each of the corner portions 31 to 36. According to this structure, the cross-sectional area of the corner portions 31 to 36, at which current concentration is easy, can be increased by the feed conductor 24, current concentration is moderated, and loss caused by current concentration can be suppressed.

[0099] In addition, the bending angle of each of the bent feed conductors 24 is investigated. The bending angle of the bent feed conductor is defined as the angle at which lines that connect the widthwise centers of the bent feed conductor cross and is an angle measured from the inner peripheral side of the coil. Referring to FIG. 25 A more specific description will be given. FIG. 25 The bent feed conductor shown in FIG. 8, for example, corresponds to FIG. 6 the bent feed conductor 24-2 shown in FIG. 9. The bent feed conductor 24-2 has two bent portions Ba and Bb. In the bent feed conductor 24-2, as lines that connect the widthwise centers thereof, a line CL1, a line CL2, and a line CL3 can be drawn. As the bending angle of the bent feed conductor 24-2, there are an angle θ1 formed by the line CL1 and the line CL2 and an angle θ2 formed by the line CL26 and the line CL3.

[0100] The above-described θ1 is 90 degrees or more and less than 180 degrees. The bent feed conductor having such a bending angle θ1 contributes to an increase in the cross-sectional area on the corner portion at which current concentration is easy in the coil, and thus current concentration can be moderated, and loss can be suppressed.

[0101] On the other hand, θ2 exceeds 180 degrees and is 270 degrees or less. The feed conductor having such a large bending angle can make it difficult for loss caused by signal reflection to occur.

[0102] FIG. 4 the bent feed conductor 24-1 shown in FIG. 8, FIG. 10 the bent feed conductor 24-4 shown in FIG. 10, FIG. 12 the bent feed conductor 24-5 shown in FIG. 11, FIG. 14 the bent feed conductor 24-6 shown in FIG. 12, FIG. 16 the bent feed conductor 24-7 shown in FIG. 13, and FIG. 22 the bent feed conductor 24-10 shown in FIG. 16 has a bent portion having a bending angle θ1 of 90 degrees or more and less than 180 degrees.

[0103] On the other hand, FIG. 6 the bent feed conductor 24-2 shown in FIG. 9, FIG. 8 the bent feed conductor 24-3 shown in FIG. 14, FIG. 18 the bent feed conductor 24-8 shown in FIG. 15, andFIG. 20 The curved conductive conductor 24-9 shown has both a curved portion Ba having a curved angle θ1 of 90 degrees or more and less than 180 degrees and a curved portion Bb having a curved angle θ2 of more than 180 degrees and 270 degrees or less. Thus, the curved conductive conductor having two curved portions Ba and Bb can further improve the effect of suppressing loss compared to the curved conductive conductor having one curved portion.

[0104] In addition, the above-described embodiment has the following feature: the number of turns of the wire conductor 23 in the same interface between the non-conductive material layers 19 is 0.7 turns or more and less than 2 turns. If the above-described number of turns is 0.7 turns or more, the magnetic flux leakage can be reduced, and if it is less than 2 turns, the passage area of the magnetic flux can be ensured more widely.

[0105] Further, regarding the above-described number of turns, 1 turn is defined as follows. From the start end to the terminal end of the wire conductor 23, tangent lines are sequentially drawn along the outer periphery of the wire conductor 23, and the stage at which the tangent line has rotated by 360 degrees is defined as 1 turn.

[0106] In the embodiments described below after the second embodiment, the above-described effect by the curved conductive conductor 24 obtained in the first embodiment also acts.

[0107] Next, the inductor 11a of the second embodiment of the present application will be described with reference to FIG. 26 to FIG. 6. FIG. 26 is a view corresponding to FIG. 2 In FIG. 26 , elements corresponding to the elements shown in FIG. 2 are labeled with the same reference numerals, and overlapping descriptions are omitted.

[0108] As described above, the curved conductive conductor having two curved portions can further improve the effect of suppressing loss compared to the curved conductive conductor having one curved portion. In FIG. 26 the inductor 11a shown, the long strip-shaped curved conductive conductor 24 extending along the wire conductor 23 in the coil 20a has six curved portions B1 to B6. Thus, the effect of suppressing loss can be further improved.

[0109] Next, the inductor 11b of the third embodiment of the present application will be described with reference to FIG. 27 to FIG. 7. FIG. 27 is a view corresponding to FIG. 2 In FIG. 27 , elements corresponding to the elements shown in FIG. 2 are labeled with the same reference numerals, and overlapping descriptions are omitted.

[0110] In FIG. 27In the illustrated inductor 11b, the long strip-shaped bent conduction conductor 24 extending along the wire conductor 23 in the coil 20b has two bent portions B1 and B2. In addition, FIG. 26 The bent portions of the bent conduction conductor 24 illustrated in the foregoing drawings as a whole exhibit a flexural bend, but FIG. 27 The bent portions B1 and B2 of the bent conduction conductor 24 illustrated as a whole exhibit a flexural bend. Thus, "bend" should be understood to have a broad meaning from "flex" to "bend".

[0111] In addition, FIG. 27 The illustrated coil 20b is different from the coil 20 illustrated in FIG. 2 and the like in the manner. This point first indicates that the coil can take various manners. In addition, since FIG. 27 The perspective shape of the axis direction of the illustrated coil 20b is a simple oval shape, whereby it is possible to reduce the unevenness on the inner periphery side thereof. Thus, it is possible to suppress the loss caused by current concentration and the like.

[0112] Next, referring to FIG. 28 , the inductor 11c of the fourth embodiment of the present application will be described. FIG. 28 is a view corresponding to FIG. 2 In FIG. 28 , elements corresponding to elements illustrated in FIG. 2 are labeled with the same reference numerals, and the overlapping description is omitted.

[0113] FIG. 28 The coil 20c provided to the inductor 11c illustrated has the following features: the number of turns of the wire conductor 23 within the same interface between the non-conductive material layers 19 is less than 1 turn, and the wire conductor 23 along each interface between the non-conductive material layers 19 is a certain number of turns. According to this structure, it is known that the interval of each of the bent conduction conductors 24-1, 24-2, 24-3, and 24-4 is equal, the bottleneck in the current path provided by the coil 20c disappears, and it is possible to hardly generate the loss caused by current concentration and the like. FIG. 28

[0114] The first to fourth embodiments described above have the following features in common: the width direction dimension of the wire conductor 23 within the same interface between the non-conductive material layers 19 is constant. According to this structure, since it is possible to reduce the unevenness on the inner periphery side of the coil 20, 20a, 20b, and 20c, it is possible to hardly generate the loss caused by current concentration and the like.

[0115] Next, referring to FIG. 29 the inductor 11d of the fifth embodiment of the present application will be described. FIG. 29 is a view corresponding to FIG. 2 In FIG. 29 ​In the middle, for the equivalent FIG. 2 The elements shown are labeled with the same reference numerals as those in the attached drawings, and repeated descriptions are omitted.

[0116] FIG. 29 The inductor 11d shown differs from those in the first to fourth embodiments in that the width dimension of the line conductor 23 within the same interface between the non-conductive material layers 19 is not fixed. FIG. 29 In the inductor 11d shown, the main surface of the non-conductive material layer 19 is rectangular with a short side 37 and a long side 38, and the axial perspective shape of the coil 20d is approximately rectangular. The wire conductor 23 has a short side portion 23S extending along the short side 37 and a long side portion 23L extending along the long side 38, and the line width of the short side portion 23S is greater than the line width of the long side portion 23L.

[0117] According to this structure, since the linewidth of the short side portion 23S in the conductor 23 is greater than the linewidth of the long side portion 23L, the inner periphery shape of the coil 20d can be made closer to a square. Therefore, it is difficult to cause magnetic flux interference, that is, a higher Q value can be obtained without significantly reducing the inductance efficiency.

[0118] In addition, FIG. 29 In the inductor 11d shown, the bent conducting conductor 24 extends from the short side portion 23S of the line conductor 23 to the long side portion 23L, and the portion connected to the short side portion 23S is wider than the portion connected to the long side portion 23L. With this structure, the contact area between the line conductor 23 and the conducting conductor 24 is increased, thereby improving connection reliability.

[0119] Next, refer to FIG. 30 The inductor 11e according to the sixth embodiment of the present invention will be described. FIG. 30 It is equivalent to FIG. 2 The image. FIG. 30 In the middle, for the equivalent FIG. 2 The elements shown are labeled with the same reference numerals as those in the attached drawings, and repeated descriptions are omitted.

[0120] exist FIG. 30 The inductor 11e shown also has the same characteristics as described above. FIG. 29 The inductor 11d shown is essentially the same; the non-conductive material layer 19 is rectangular with a short side 37 and a long side 38, and the wire conductor 23 has a short side portion 23S extending along the short side 37 and a long side portion 23L extending along the long side 38, with the linewidth of the short side portion 23S being greater than that of the long side portion 23L. However, in FIG. 30 In the inductor 11e shown, with FIG. 29 The inductor 11d shown is different; the perspective shape of the coil 20e along its axial direction is elliptical.

[0121] With this structure, the linewidth of the short side portion 23S is greater than that of the long side portion 23L due to the online conductor 23. Therefore, the inner periphery shape of the coil 20e can be made closer to a circle. As a result, it is difficult to cause magnetic flux interference, that is, a higher Q value can be obtained without significantly reducing the inductance acquisition efficiency.

[0122] In addition, FIG. 30 In the inductor 11e shown, the bent conducting conductor 24 also extends from the short side portion 23S of the line conductor 23 to the long side portion 23L, and the portion connecting to the short side portion 23S is wider than the portion connecting to the long side portion 23L. With this structure, the contact area between the line conductor 23 and the conducting conductor 24 is increased, thereby improving connection reliability.

[0123] Next, refer to FIG. 31 The inductor 11f of the seventh embodiment of the present invention will be described. FIG. 31 It is equivalent to FIG. 2 The image.

[0124] FIG. 31 In addition to conducting conductor 24, the inductor 11f shown also has the same characteristics as described above. FIG. 29 The structure of the inductor 11d shown is essentially the same. Therefore, in FIG. 31 In the middle, for the equivalent FIG. 29 The elements shown are labeled with the same reference numerals as those in the attached drawings, and repeated descriptions are omitted.

[0125] exist FIG. 31 The inductor 11f shown includes two bent conducting conductors 24a and two dot-shaped conducting conductors 24b. From the perspective view of the coil 20f along its axial direction, it can be seen that the above-mentioned… FIG. 29 The bent conducting conductor 24 in the inductor 11d shown is divided into a bent conducting conductor 24a and a dot-shaped conducting conductor 24b.

[0126] like FIG. 31 As shown, the curved conductive conductor 24a is configured to contact the relatively thin long side portion 23L of the line conductor 23, and the dotted conductive conductor 24b is configured to contact the relatively wide short side portion 23S of the line conductor 23.

[0127] The present invention has been described above in connection with several embodiments illustrated, but various other modifications are possible within the scope of the present invention.

[0128] For example, in the illustrated embodiment, the coils 20, 20a, 20b, 20c, 20d, 20e, and 20f are arranged inside the component main body 12 in a state in which the axis thereof is oriented in a direction parallel to the mounting surface 13, but the direction of lamination of the non-conductive material layer can be changed to orient the axis of the coil in a direction orthogonal to the mounting surface. In addition, the axis of the coil can be oriented in a direction parallel to the mounting surface, and in the direction of the long side of the component main body (for example, the left-right direction in FIG. 1). FIG. 2

[0129] In addition, in the illustrated embodiment, the external terminal electrodes 26 and 27 are provided on both of the mounting surface 13 of the component main body 12 and each of the first end surface 17 and the second end surface 18 adjacent to the mounting surface 13, but for example, can be formed so as to extend to the top surface 14 and the first side surface 15 and the second side surface 16, or can be formed only on the mounting surface 13, and the formation region of the external terminal electrode can be arbitrarily changed as needed.

[0130] In addition, the total number of turns of the plurality of wire conductors provided in the coil can be arbitrarily changed by changing the number of connections of the wire conductors and the conductive conductor.

[0131] In addition, each of the embodiments described in this specification is exemplary, and partial substitution or combination of structures can be made between different embodiments.​

Claims

1. An inductor comprising: a component body composed of a non-conductive material; and a plurality of wire conductors each extending along a main surface of the component body, a plurality of through conductors each extending perpendicularly to the main surface of the component body, and a spiral-shaped track formed by connecting the wire conductors and the through conductors, wherein the plurality of through conductors include a long strip-shaped long strip through conductor extending along the wire conductors, the long strip through conductor includes a curved through conductor having a curved shape, and the curved through conductor includes a curved through conductor having a curved portion with a curved angle of more than 180 degrees and 270 degrees or less.

2. The inductor according to claim 1, wherein the curved through conductor includes a curved through conductor having a curved portion with a curved angle of 90 degrees or more and less than 180 degrees. A coil is disposed inside the component main body. The coil has a plurality of wire conductors and a plurality of conduction conductors. The coil is configured to generate a magnetic field in the component main body.

3. An inductor comprising: a component body composed of a non-conductive material; and a plurality of wire conductors each extending along a main surface of the component body, a plurality of through conductors each extending perpendicularly to the main surface of the component body, and a spiral-shaped track formed by connecting the wire conductors and the through conductors, wherein the plurality of through conductors include a long strip-shaped long strip through conductor extending along the wire conductors, the long strip through conductor includes a curved through conductor having a curved shape, and the curved through conductor has curved portions at two or more places.

4. The inductor according to claim 3, wherein the curved through conductor has curved portions at three or more places.

5. The inductor according to any one of claims 1 to 4, wherein the spiral-shaped track has an angular portion in which an angle is formed, and the curved through conductor is positioned at the angular portion.

6. The inductor according to any one of claims 1 to 4, wherein a number of turns of one of the wire conductors is 0.7 turns or more and less than 2 turns.

7. The inductor according to any one of claims 1 to 4, wherein a number of turns of the plurality of wire conductors is a certain number of turns of less than 1 turn.

8. The inductor according to any one of claims 1 to 4, wherein a dimension in a width direction of one of the wire conductors is constant.

9. An inductor comprising: a component body composed of a non-conductive material; and a plurality of wire conductors each extending along a main surface of the component body, a plurality of through conductors each extending perpendicularly to the main surface of the component body, and a spiral-shaped track formed by connecting the wire conductors and the through conductors, wherein the plurality of through conductors include a long strip-shaped long strip through conductor extending along the wire conductors, the long strip through conductor includes a curved through conductor having a curved shape, the component body has a cuboid shape, the main surface has a rectangular shape having a short side and a long side, the wire conductor has a short side portion extending along the short side and a long side portion extending along the long side, a wire width of the short side portion is greater than a wire width of the long side portion, and in the curved through conductor, a wire width of a portion connected to the short side portion is greater than a wire width of a portion connected to the long side portion. ​ A coil is disposed inside the component main body. The coil has a plurality of wire conductors and a plurality of conduction conductors. The coil is configured to generate a magnetic field in the component main body. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A coil is disposed inside the component main body. The coil has a plurality of wire conductors and a plurality of conduction conductors. The coil is configured to generate a magnetic field in the component main body. ​ ​ ​ ​ ​ ​

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