inductor

Abstract

Provided is an inductor having: an internal terminal conductor that is arranged so as to be embedded inside a component main body and is partially exposed on the outer surface of the component main body to serve as a terminal, and that is less likely to be detached due to temperature changes or thermal shock. Inside the component main body (12), anchor conductors (35 (35-1 to 35-6), 36 (36-1 to 36-6)) are arranged so as to extend from the internal terminal conductors (29 (29-1 to 29-8), 30 (30-1 to 30-8)) while being in contact with the component main body (12). The anchor conductors (35, 36) are not connected to the coil conductor (20) that includes the winding portion (23 (23-1 to 23-8)), and are arranged so as not to be exposed on the outer surface of the component main body (12). The anchor conductors (35, 36) function to improve the fixing force of the internal terminal conductors (29, 30) with respect to the component main body (12) by being in contact with the component main body (12).

Description

[0001] This application is a divisional application of application number 2020 1 0668 133.1, filed on July 13, 2020, entitled "Inductor". Technical Field

[0002] The present invention relates to inductors, and more particularly to inductors having a structure in which coil conductors are arranged inside a component body made of a non-conductive material. Background Technology

[0003] For example, as described in Japanese Patent Application Publication No. 2019-33127 (Patent Document 1), the inductor of interest in this invention has a component body having a laminated structure consisting of multiple layers of non-conductive material, and a coil conductor is disposed inside the component body. Figure 12 Equivalent to Patent Document 1 Figure 3 The diagram shows the inductor 1 from a direction orthogonal to the side 3 of the main body 2 of the component.

[0004] Figure 12 The diagram schematically illustrates the coil conductor 4 and internal terminal conductors 5 and 6 disposed inside the component body 2, in a perspective view along the coil axis of the coil conductor 4.

[0005] Although not shown in detail, a first lead conductor and a second lead conductor are respectively connected to the first and second opposite ends of the coil conductor 4. The first and second lead conductors are connected to the first internal terminal conductor 5 and the second internal terminal conductor 6, respectively. The internal terminal conductors 5 and 6 become the terminals of the inductor 1. The internal terminal conductors 5 and 6 are arranged inside the component body 2 and are partially exposed on the outer surface of the component body 2. It is also possible that the external terminal conductors (not shown) are formed with, for example, a plating film, covering the exposed portions of the internal terminal conductors 5 and 6 respectively.

[0006] The first internal terminal conductor 5 and the second internal terminal conductor 6 are exposed spaced apart from each other on the first end face 8 and the second end face 9, respectively, on the mounting surface 7 facing the mounting substrate of the component body 2. Furthermore, the first internal terminal conductor 5 is connected to the portion exposed on the mounting surface 7 and is exposed on the first end face 8, while the second internal terminal conductor 6 is connected to the portion exposed on the mounting surface 7 and is exposed on the second end face 9. Thus, as... Figure 12 As shown, the internal terminal conductors 5 and 6 are respectively L-shaped.

[0007] Patent Document 1: Japanese Patent Application Publication No. 2019-33127

[0008] When the inductor 1 described in Patent Document 1 is mounted on a mounting substrate, the internal terminal conductors 5 and 6, which serve as terminals, are soldered to a conductive connection pad on the mounting substrate side. As described above, when external terminal conductors are provided to cover the exposed portions of the internal terminal conductors 5 and 6 respectively, the internal terminal conductors 5 and 6 are soldered to the conductive connection pad on the mounting substrate side via the external terminal conductors.

[0009] In the inductor 1 installed as described above, there is a situation where the internal terminal conductors 5 and 6 detach from the main body 2, thus causing poor conductivity between the internal terminal conductors 5 and 6 and the coil conductor 4. The detachment of the internal terminal conductors 5 and 6 is often caused by the different expansion and contraction behaviors of different materials due to temperature changes or thermal shock.

[0010] Temperature changes, for example, are caused by changes in the ambient temperature where the inductor 1 is placed, and thermal shocks, for example, are caused by the heat generated during the reflow soldering process applied when mounting the inductor 1 or other components onto the mounting substrate.

[0011] Furthermore, typically, the difference in expansion and contraction behavior occurs between the component body 2 and the mounting substrate of the inductor 1 in its mounted state. For example, the mounting substrate expands and contracts along with the internal terminal conductors 5 and 6. On the other hand, there is a difference in expansion and contraction behavior between them and the component body 2, which exhibits a different expansion and contraction behavior. This difference can cause the internal terminal conductors 5 and 6 to detach from the component body 2, resulting in an undesirable situation. In addition, the difference in expansion and contraction behavior between the internal terminal conductors 5 and 6 and the component body 2 is also a cause of the detachment of the internal terminal conductors 5 and 6. Summary of the Invention

[0012] Therefore, the object of the present invention is to provide an inductor that is not prone to detachment of internal terminal conductors due to temperature changes or thermal shock.

[0013] The inductor according to the present invention is characterized by comprising: a component body made of a non-conductive material; a coil conductor disposed inside the component body and having a winding portion between a first end and a second end opposite to each other, and between the first end and the second end; a first lead conductor and a second lead conductor respectively connected to the first end and the second end of the coil conductor; and a first internal terminal conductor and a second internal terminal conductor respectively connected to the first lead conductor and the second lead conductor, and disposed in a state of being embedded inside the component body, and partially exposed on the outer surface of the component body. In order to solve the above-mentioned technical problem, a first anchor conductor and a second anchor conductor are also provided, wherein the first anchor conductor and the second anchor conductor extend from the first internal terminal conductor and the second internal terminal conductor respectively in a state of contact with the component body, but are not connected to the coil conductor.

[0014] According to the present invention, the first anchoring conductor and the second anchoring conductor increase the fixing force of the first internal terminal conductor and the second internal terminal conductor relative to the component body. Therefore, it is less likely for the internal terminal conductor to detach due to temperature changes or thermal shock. Attached Figure Description

[0015] Figure 1 This is a perspective view showing the appearance of the inductor 11 according to the first embodiment of the present invention.

[0016] Figure 2 It is Figure 1 The inductor 11 shown is an exploded perspective view, with the external terminal conductors omitted.

[0017] Figure 3 It is shown schematically in perspective along the coil axis of coil conductor 20. Figure 1 The diagram shows the inductor 11.

[0018] Figure 4 yes Figure 1 The inductor 11 shown along Figure 1 A cross-sectional view of face AA.

[0019] Figure 5 Is with Figure 4 The corresponding sectional view, and is a representation Figure 4 A diagram showing a variation of the structure.

[0020] Figure 6 In order to Figure 1 An example of the manufacturing method of the inductor 11 is illustrated by showing cross-sectional views of several steps.

[0021] Figure 7 This is a perspective view showing the inductor 11a of the second embodiment of the present invention exploded.

[0022] Figure 8 yes Figure 7 The cross-sectional view of the inductor 11a shown is illustrated, and it shows the equivalent of the cross-section along the inductor 11a. Figure 1 The cross section of surface BB.

[0023] Figure 9 Is with Figure 8 The corresponding sectional view, and is shown Figure 8 The diagram shows the first variation of the structure.

[0024] Figure 10 Is with Figure 8 The corresponding sectional view, and is shown Figure 8 The diagram shows a second variation of the structure.

[0025] Figure 11 This is a perspective view showing the inductor 11b of the third embodiment of the present invention exploded.

[0026] Figure 12 This is a diagram used to illustrate the inductor 1 described in Patent Document 1. It schematically shows the coil conductor 4 and the internal terminal conductors 5 and 6 disposed inside the component body 2 from a perspective along the coil axis direction of the coil conductor 4.

[0027] Explanation of reference numerals in the attached figures

[0028] 11, 11a, 11b...Inductor; 12...Inductor; 13...Mounting surface; 14...Top surface; 15, 16...Side surface; 17, 18...End face; 19...Non-conductive material layer; 20...Coil conductor; 21...First end; 22...Second end; 23...Wound portion; 24...Through hole conductor; 27...First lead conductor; 28...Second lead conductor; 29...First internal terminal conductor; 30...Second internal terminal conductor; 31...First external terminal conductor; 32...Second external terminal conductor; 33...Nickel plating layer; 34...Tin plating layer; 35, 37...First anchoring conductor; 36, 38...Second anchoring conductor. Detailed Implementation

[0029] [First Implementation]

[0030] Reference Figures 1-4 The inductor 11 of the first embodiment of the present invention will be described.

[0031] The inductor 11 includes a component body 12. The component body 12 is made of at least one non-conductive material, including, for example, glass, resin, and ferrite. Alternatively, when the component body 12 is a molded body of resin or the like, 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 combining multiple of these materials, including glass, ferrite, and resin. The component body 12 has a cuboid shape. The cuboid shape may, for example, have rounded or chamfered edges and corners.

[0032] More specifically, such as Figure 1 As shown, the cuboid-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 respectively and opposing each other.

[0033] like Figure 2 As shown, the main body 12 of the component has a laminated structure consisting of multiple non-conductive material layers 19. The multiple non-conductive material layers 19 extend along the extension directions of the first end face 17 and the second end face 18, and are laminated in a direction parallel to the mounting surface 13.

[0034] A coil conductor 20 extending in a spiral shape is disposed inside the component body 12. The coil conductor 20 has a first end 21 and a second end 22 that are opposite to each other, and between the first end 21 and the second end 22, there are a plurality of winding portions 23 extending along a portion of an annular track formed at any one of the plurality of non-conductive material layers 19; and a plurality of through-hole conductors 24 penetrating any one of the non-conductive material layers 19 in the thickness direction. In the coil conductor 20, the aforementioned winding portions 23 and through-hole conductors 24 are formed in a spiral shape by alternating connections. At the respective ends and specific portions of the plurality of winding portions 23, there are through-pads 25 with relatively large areas for connecting them to the through-hole conductors 24. Figure 2 In the diagram, a single-dotted line indicates the electrical connection state of the via conductor 24.

[0035] A first lead conductor 27 and a second lead conductor 28 are respectively connected to the first end 21 and the second end 22 of the coil conductor 20. The first lead conductor 27 and the second lead conductor 28 are formed by extensions of the winding portion 23 that respectively positions the first end 21 and the second end 22 of the coil conductor 20.

[0036] A first internal terminal conductor 29 and a second internal terminal conductor 30 are respectively connected to the first lead conductor 27 and the second lead conductor 28. The internal terminal conductors 29 and 30 should become terminals of the inductor 11 and be arranged to be embedded inside the component body 12, and partially exposed on the outer surface of the component body 12.

[0037] In this embodiment, at the mounting surface 13 of the component body 12, the first internal terminal conductor 29 and the second internal terminal conductor 30 are exposed at intervals from each other on the first end face 17 side and the second end face 18 side, respectively. The first internal terminal conductor 29 is connected to the portion exposed on the mounting surface 13 and is exposed on the first end face 17, while the second internal terminal conductor 30 is connected to the portion exposed on the mounting surface 13 and is exposed on the second end face 18.

[0038] Thus, as Figure 2 and Figure 3As shown, the internal terminal conductors 29 and 30 are each L-shaped. This structure, where the internal terminal conductors 29 and 30 are exposed across two adjacent surfaces of the component body 12, allows for the formation of appropriately shaped solder joints when the inductor 11 is mounted on the mounting substrate, thus achieving a highly reliable mounting configuration for both electrical and mechanical connections.

[0039] like Figure 1 , Figure 3 and Figure 4 As shown, alternatively, a first external terminal conductor 31 and a second external terminal conductor 32 may be provided, respectively covering the exposed portions of the first internal terminal conductor 29 and the second internal terminal conductor 30, as needed. The external terminal conductors 31 and 32 can improve the solder wettability of the internal terminal conductors 29 and 30, for example, those containing silver as a conductive component, and prevent solder erosion.

[0040] Furthermore, if the external terminal conductors 31 and 32 are made of plated films, the exposed portions of the internal terminal conductors 29 and 30 can be used as substrates for the deposition of the electroplated film, allowing the external terminal conductors 31 and 32 to be formed efficiently at the desired locations. The external terminal conductors 31 and 32 are respectively, for example, as shown in... Figure 4 The structure shown consists of a nickel plating layer 33 on a substrate and a tin plating layer 34 thereon. This structure enables the external terminal conductors 31 and 32 to effectively perform the aforementioned functions of improving solder wettability and preventing solder erosion. Alternatively, a copper plating layer may be formed instead of the nickel plating layer 33, or a copper plating layer may be formed between the nickel plating layer 33 and the tin plating layer 34.

[0041] If we show an example of the dimensions of several parts of an actual product of inductor 11, the longitudinal dimension of mounting surface 13 and top surface 14 is 0.6±0.03mm, and the width dimension is 0.3±0.03mm. The height dimension of sides 15 and 16 is 0.4±0.02mm. On end faces 17 and 18, the height dimension of external terminal conductors 31 and 32 is 0.2±0.03mm, and the width dimension is 0.24±0.03mm. The dimensions of external terminal conductors 31 and 32 on mounting surface 13, measured along the longitudinal direction of mounting surface 13, are 0.15±0.03mm.

[0042] As a characteristic structure of this embodiment, it includes a first anchoring conductor 35 and a second anchoring conductor 36 that extend from the first internal terminal conductor 29 and the second internal terminal conductor 30 respectively while in contact with the component body 12, but are not connected to the coil conductor 20. The anchoring conductors 35 and 36, through their contact with the component body 12, enhance the fixing force of the internal terminal conductors 29 and 30 relative to the component body 12. As a result, it is less likely for the internal terminal conductors 29 and 30 to detach from the component body 12 due to temperature changes or thermal shock.

[0043] Preferably, the first anchoring conductor 35 and the second anchoring conductor 36 are disposed inside the component body 12 in a state where they are not exposed on the outer surface of the component body 12. With this structure, the contact area between the anchoring conductors 35 and 36 and the component body 12 can be increased, and a structure in which the anchoring conductors 35 and 36 are clamped by a specific portion of the component body 12 can be achieved. Therefore, the fixing force of the internal terminal conductors 29 and 30 relative to the component body 12 can be further improved.

[0044] The boundaries between the aforementioned coil conductor 20, lead conductors 27, 28, internal terminal conductors 29, 30, and anchor conductors 35, 36 can be seen from... Figure 3 The coil conductor 20, lead conductors 27 and 28, internal terminal conductors 29 and 30, and anchor conductor 36 are schematically shown in a map with different shades cast on each other.

[0045] As mentioned above, the main body 12 of the component has a laminated structure consisting of multiple non-conductive material layers 19. However, the interfaces between the multiple non-conductive material layers 19 that embody the laminated structure are often almost eliminated in the actual product due to the firing or curing process. However, for ease of explanation, the structure existing as a laminated structure of non-conductive material layers 19, for each individual non-conductive material layer 19, and for the non-conductive material layer 19 and its associated structure, will be mainly referred to... Figure 2 Please provide an explanation.

[0046] Furthermore, in the following description, specific portions of the multiple non-conductive material layers 19 will be described where necessary, such as "19-1", "19-2", etc., using reference numerals with subdivision numbers added to "19". Additionally, the same reference numerals as those used for the multiple winding portions 23, multiple via conductors 24, multiple through pads 25, multiple first anchor conductors 35, and multiple second anchor conductors 36 will be used for the multiple non-conductive material layers 19.

[0047] Figure 2The figure shows 11 non-conductive material layers 19-1, 19-2, ..., 19-11. These non-conductive material layers 19-1, 19-2, ..., 19-11 are stacked sequentially from the first side 15 toward the second side 16.

[0048] The two non-conductive material layers 19-1 and 19-11 at the very end are given a different color from the other non-conductive material layers 19 by adding pigments such as cobalt. This is to facilitate detection when the inductor 11 rolls laterally during installation.

[0049] The following description will explain the formation of conductors such as coil conductor 20 in the order from non-conductive material layer 19-1 toward non-conductive material layer 19-11.

[0050] <1>

[0051] A first lead conductor 27 and a winding portion 23-1 with less than one turn connected thereto are wound at the interface between the non-conductive material layers 19-2 and 19-3, and a pass pad 25-1 is provided at the end of the winding portion 23-1. Although details are not shown, a through-hole conductor 24-1 penetrating the non-conductive material layer 19-3 along the thickness direction is provided for connection to the pass pad 25-1. The first lead conductor 27 is connected to the first internal terminal conductor 29.

[0052] In the non-conductive material layer 19-3, the first terminal conductor sheet 29-1, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-1, which is part of the second internal terminal conductor 30, are arranged to penetrate the non-conductive material layer 19-3 in the thickness direction, i.e., the stacking direction.

[0053] <2>

[0054] A winding portion 23-2 with more than one turn is provided at the interface between the non-conductive material layers 19-3 and 19-4, and through pads 25-2 and 25-3 are provided at both ends of the winding portion 23-2. The through pad 25-2 is connected to the aforementioned via conductor 24-1. On the other hand, in order to connect with the through pad 25-3, a via conductor 24-2 is provided that penetrates the non-conductive material layer 19-4 in the thickness direction.

[0055] On the non-conductive material layer 19-4, the first terminal conductor sheet 29-2, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-2, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material along its thickness direction.

[0056] Furthermore, at the interface between the non-conductive material layers 19-3 and 19-4, a first anchoring conductor 35-1 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-1 extending from the second internal terminal conductor 30 are provided.

[0057] <3>

[0058] At the interface between the non-conductive material layers 19-4 and 19-5, a winding portion 23-3 with more than one turn is provided, and pass-through pads 25-4 and 25-5 are provided at both ends of the winding portion 23-3. The pass-through pad 25-4 is connected to the aforementioned via conductor 24-2. On the other hand, a via conductor 24-3 penetrating the non-conductive material layer 19-5 along the thickness direction is provided for connection with the pass-through pad 25-5.

[0059] In the non-conductive material layer 19-5, the first terminal conductor sheet 29-3, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-3, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0060] Furthermore, at the interface between the non-conductive material layers 19-4 and 19-5, a first anchoring conductor 35-2 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-2 extending from the second internal terminal conductor 30 are provided.

[0061] <4>

[0062] At the interface between the non-conductive material layers 19-5 and 19-6, a winding portion 23-4 with more than one turn is provided, and through pads 25-6 and 25-7 are provided at both ends of the winding portion 23-4. The through pad 25-6 is connected to the aforementioned via conductor 24-3. On the other hand, in order to connect with the through pad 25-7, a via conductor 24-4 is provided that penetrates the non-conductive material layer 19-6 in the thickness direction.

[0063] Furthermore, a pass-through pad 25-8 is provided in the winding portion 23-4 as described above, and in the middle portion thereof. In the non-conductive material layer 19-6, a through-hole conductor 24-5 extending along its thickness direction is provided for connection with the pass-through pad 25-8.

[0064] In the non-conductive material layer 19-6, the first terminal conductor sheet 29-4, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-4, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0065] Furthermore, at the interface between the non-conductive material layers 19-5 and 19-6, a first anchoring conductor 35-3 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-3 extending from the second internal terminal conductor 30 are provided.

[0066] <5>

[0067] At the interface between the non-conductive material layers 19-6 and 19-7, a winding portion 23-5 with more than one turn is provided, and through pads 25-9 and 25-10 are provided at both ends of the winding portion 23-5. The through pad 25-9 is connected to the aforementioned via conductor 24-5. On the other hand, in order to connect to the through pad 25-10, a via conductor 24-6 is provided that penetrates the non-conductive material layer 19-7 in the thickness direction.

[0068] In addition, a pass-through pad 25-11 is provided in the winding portion 23-5 and in its middle portion.

[0069] The via pad 25-11 is connected to the aforementioned via conductor 24-4.

[0070] In the non-conductive material layer 19-7, the first terminal conductor sheet 29-5, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-5, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0071] Furthermore, at the interface between the non-conductive material layers 19-6 and 19-7, a first anchoring conductor 35-4 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-4 extending from the second internal terminal conductor 30 are provided.

[0072] <6>

[0073] At the interface between the non-conductive material layers 19-7 and 19-8, a winding portion 23-6 with more than one turn is provided, and through pads 25-12 and 25-13 are provided at both ends of the winding portion 23-6. The through pad 25-12 is connected to the aforementioned via conductor 24-6. On the other hand, in order to connect with the through pad 25-13, a via conductor 24-7 is provided that penetrates the non-conductive material layer 19-8 in the thickness direction.

[0074] In the non-conductive material layer 19-8, the first terminal conductor sheet 29-6, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-6, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0075] Furthermore, at the interface between the non-conductive material layers 19-7 and 19-8, a first anchoring conductor 35-5 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-5 extending from the second internal terminal conductor 30 are provided.

[0076] <7>

[0077] At the interface between the non-conductive material layers 19-8 and 19-9, a winding portion 23-7 with more than one turn is provided, and through pads 25-14 and 25-15 are provided at both ends of the winding portion 23-7. The through pad 25-14 is connected to the aforementioned via conductor 24-7. On the other hand, in order to connect to the through pad 25-15, a via conductor 24-8 is provided that penetrates the non-conductive material layer 19-9 in the thickness direction.

[0078] In the non-conductive material layer 19-9, the first terminal conductor sheet 29-7, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-7, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0079] Furthermore, at the interface between the non-conductive material layers 19-8 and 19-9, a first anchoring conductor 35-6 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-6 extending from the second internal terminal conductor 30 are provided.

[0080] <8>

[0081] A winding portion 23-8 with less than one turn and a second lead conductor 28 connected thereto are provided at the interface between the non-conductive material layers 19-9 and 19-10, and a pass pad 25-16 is provided at the end of the winding portion 23-8. The pass pad 25-16 is connected to the aforementioned through-hole conductor 24-8. The second lead conductor 28 is connected to the second internal terminal conductor 30.

[0082] A first terminal conductor sheet 29-8, which becomes part of the first internal terminal conductor 29, and a second terminal conductor sheet 30-8, which becomes part of the second internal terminal conductor 30, are provided in the non-conductive material layer 19-10. Figure 2 As shown, the first terminal conductor sheet 29-8 and the second terminal conductor sheet 30-8 can also be arranged along the interface between the non-conductive material layers 19-9 and 19-10, or they can be arranged to penetrate the non-conductive material layer 19-10 in the thickness direction.

[0083] Furthermore, in <4> and <5> above, it is explained that a pass pad 25-8 is provided in the middle of the winding portion 23-4, and a via conductor 24-5 is provided for connection to the pass pad 25-8; and a pass pad 25-11 is provided in the middle of the winding portion 23-5, and a via conductor 24-4 is provided for connection to the pass pad 25-11. That is, the end of the winding portion 23-4 and the middle portion of the winding portion 23-5 are connected by the via conductor 24-4, and the middle portion of the winding portion 23-4 and the end of the winding portion 23-5 are connected by the via conductor 24-4. This is to prevent the inductor 11 from exhibiting directionality and to make the coil conductor 20 a 180-degree rotationally symmetrical shape.

[0084] In the inductor 11 with the above-described structure, the coil axis of the coil conductor 20 extends in a direction parallel to the mounting surface 13 of the component body 12. Therefore, when the inductor 11 is mounted on the mounting substrate, the direction of the magnetic flux generated in the coil conductor 20 is parallel to the mounting surface.

[0085] Furthermore, the first internal terminal conductor 29 and the second internal terminal conductor 30 are respectively composed of an assembly of multiple first terminal conductor sheets 29-1 to 29-8 and an assembly of multiple second terminal conductor sheets 30-1 to 30-8, and are therefore arranged to penetrate multiple non-conductive material layers 19 along the lamination direction. Thus, the first internal terminal conductor 29 and the second internal terminal conductor 30 can form a relatively large exposed surface on the outer surface of the component body 12.

[0086] Furthermore, the number of turns of the coil conductor 20 can be increased or decreased as needed. For example, if the winding portions 23-2 and 23-3 associated with the non-conductive material layers 19-4 and 19-5 are omitted, or the winding portions 23-6 and 23-7 associated with the non-conductive material layers 19-8 and 19-9 are omitted, the number of turns of the coil conductor 20 can be reduced. Conversely, if winding portions equivalent to the aforementioned winding portions 23-2 and 23-3 are added, or winding portions equivalent to the aforementioned winding portions 23-6 and 23-7 are added, the number of turns of the coil conductor 20 can be increased.

[0087] Alternatively, instead of a coil conductor 20 or internal terminal conductors 29 and 30, several non-conductive material layers 19 may be configured as needed between non-conductive material layers 19-1 and 19-2, and between non-conductive material layers 19-10 and 19-11.

[0088] As described above, the first anchoring conductor 35 and the second anchoring conductor 36 are disposed at the interface between adjacent layers of the plurality of non-conductive material layers 19. In this case, for the plurality of first anchoring conductors 35-1 to 35-6, as Figure 4As shown, a plurality of first anchoring conductors 35 and a plurality of second anchoring conductors 36 are formed from the first internal terminal conductor 29 and the second internal terminal conductor 30, respectively, into a plurality of strip-shaped conductors extending in a strip shape. That is, a non-conductive material layer 19 is sandwiched between adjacent conductors of the plurality of strip-shaped conductors. With this structure, the contact area between the anchoring conductors 35, 36 and the component body 12 can be increased, and the fixing force of the internal terminal conductors 29, 30 relative to the component body 12 can be further improved.

[0089] In addition, such as Figure 2 , Figure 3 and Figure 4 As shown, the first anchoring conductor 35 and the second anchoring conductor 36 extend from the first internal terminal conductor 29 and the second internal terminal conductor 30 toward the top surface 14 of the component body 12, respectively. Therefore, stress generated by thermal shock during the reflow soldering process during installation can escape away from the mounting surface 13, making it less likely for the internal terminal conductors 29 and 30 to detach. Furthermore, especially when the force applied to the internal terminal conductors 29 and 30 is directed from the top surface 14 of the component body 12 toward the mounting surface 13, the effect of increased fixing force based on the anchoring conductors 35 and 36 can be further enhanced.

[0090] In addition, such as Figure 2 and Figure 4 As shown, the multiple strip conductors formed by anchor conductors 35 and 36 extend parallel to each other and have different end positions at distances to the top surface 14 of the component body 12. In short, the strip conductors formed by anchor conductors 35-1, 35-3, 35-5, 36-2, 36-4, and 36-6 are shorter than the strip conductors formed by anchor conductors 35-2, 35-4, 35-6, 36-1, 36-3, and 36-5. This structure mitigates stress concentration caused by thermal shock, thus reducing the likelihood of detachment of the internal terminal conductors 29 and 30. Furthermore, the multiple strip conductors can be of three or more lengths, not just longer and shorter ones.

[0091] The first anchoring conductor 35 and the second anchoring conductor 36 may not be disposed at the interface between adjacent layers of the plurality of non-conductive material layers 19 as described above, but rather are disposed in a manner that penetrates the non-conductive material layers 19 along the stacking direction. Thus, for the plurality of first anchoring conductors 35-1 to 35-6, as... Figure 5 As shown, the plurality of first anchoring conductors 35 and the plurality of second anchoring conductors 36 extend in a wide manner from the first inner terminal conductor 29 and the second inner terminal conductor 30, respectively. In this case, as... Figure 5As shown, the distances from the end positions to the top surface 14 of the component body 12 can also be different for the plurality of first anchor conductors 35 and the plurality of second anchor conductors 36. According to this structure, the contact area between the anchor conductors 35, 36 and the component body 12 can also be increased, and stress concentration caused by, for example, thermal shock can be mitigated, thereby further improving the fixing force of the internal terminal conductors 29, 30 relative to the component body 12.

[0092] Furthermore, although not illustrated, the first anchoring conductor 35 and the second anchoring conductor 36 may also be mixed in the form of portions disposed at the interface between adjacent layers of the plurality of non-conductive material layers 19 and portions disposed in a manner that penetrates the non-conductive material layers 19 along the stacking direction.

[0093] In addition, such as Figure 2 As shown and from Figure 3 As can also be seen, when the main body 12 of the component is viewed from the first side 15 toward the second side 16, the first anchoring conductor 35 and the second anchoring conductor 36 are respectively located at least partially overlapping with the first lead-out conductor 27 and the second lead-out conductor 28. In this embodiment, Figure 3 In this configuration, the first anchoring conductor 35 is concealed behind the first lead-out conductor 27, and the second lead-out conductor 28 is concealed behind the second anchoring conductor 36. Therefore, in a direction parallel to the mounting surface 13, the first anchoring conductor 35 and the second anchoring conductor 36 are located at positions overlapping the first lead-out conductor 27 and the second lead-out conductor 28, respectively. With this structure, conductors can be balanced within the stacked component body 12.

[0094] Furthermore, as illustrated, the first anchoring conductor 35 and the second anchoring conductor 36 are preferably disposed integrally inside the component body 12, but may also be partially exposed on the outer surface of the component body 12.

[0095] Inductor 11 is manufactured as follows, for example. Figure 6 The manufacturing process of inductor 11 includes several steps. Figure 6 It is a sectional view, but in this sectional view, sections at four typical locations are shown as a diagram via break lines.

[0096] First, such as Figure 6 As shown in (1), a non-conductive material layer 19-2 is laminated on a non-conductive material layer 19-1. For example, an electrically insulating paste obtained by adding ferrite or metallic magnetic material to a glass such as borosilicate glass can be used as the material for the non-conductive material layer 19, which includes the non-conductive material layers 19-1 and 19-2. Sometimes, a resin is used instead of glass.

[0097] As described above, pigments such as cobalt are added to the non-conductive material layer 19-1 and the non-conductive material layer 19-11 described later.

[0098] Next, as Figure 6 As shown in (2), a conductive film comprising a conductive paste of a conductive metal such as silver is formed on the non-conductive material layer 19-2 as a conductive component, and this film is patterned. Through this patterning, in Figure 6 In the region shown in (2), a winding portion 23-1 of the coil conductor 20 and a pass pad 25-1 as part thereof are formed, as well as a portion of the first terminal conductor sheet 29-1 and a portion of the second terminal conductor sheet 30-1.

[0099] Furthermore, the patterning of the conductor film as described above, and the patterning of the non-conductive material layer 19 described later, can be achieved by methods such as photolithography, semi-additive process, screen printing, and transfer printing.

[0100] Next, as Figure 6 As shown in (3), a non-conductive material layer 19-3 is formed on the non-conductive material layer 19-2 and patterned thereon. Through this patterning, a through hole 41 for the via conductor 24-1 is formed at a position corresponding to a portion of the winding portion 23-1, i.e., the via pad 25-1, and openings 42 and 43 are formed to expose the terminal conductor pieces 29-1 and 30-1, respectively.

[0101] Next, as Figure 6 As shown in (4), a conductive film is formed by covering a non-conductive material layer 19-3 and then patterning it. Through this patterning, the winding portion 23-2 and a portion thereof, namely the via pads 25-2 and 25-3, are formed, and the remaining portions of the first terminal conductor sheet 29-1 and the second terminal conductor sheet 30-1 are formed. In addition, conductive paste is introduced into the through hole 41 to form the through hole conductor 24-1.

[0102] Next, as Figure 6 As shown in (5), a non-conductive material layer 19-4 is formed on the non-conductive material layer 19-3 and patterned thereon. Through this patterning, a through hole 44 for the via conductor 24-2 is formed at a position corresponding to a portion of the winding portion 23-2, i.e., the via pad 25-3, and openings 45 and 46 are formed to expose the terminal conductor pieces 29-1 and 30-1, respectively.

[0103] Next, as Figure 6As shown in (6), a conductive film is formed by covering a non-conductive material layer 19-3 and patterning it. Through this patterning, the winding portion 23-3 and a portion thereof, namely the through pads 25-4 and 25-5, are formed, and the first terminal conductor sheet 29-2 and the second terminal conductor sheet 30-2 are formed. In addition, conductive paste is introduced into the through hole 44 to form the through hole conductor 24-2.

[0104] The following, with Figure 6 The process shown in (5) is the same as the process and the process shown in (5). Figure 6 The same process shown in (6) needs to be repeated a number of times. Finally, the parent laminate is obtained by stacking non-conductive material layers 19-10 and 19-11.

[0105] Next, the parent laminate will be moved along... Figure 6 Cutting along the dashed line 47 and cutting lines orthogonal to 47 removes a plurality of stacked chips that should become the main body 12 of the component. According to the cut along the illustrated cutting line 47, the surfaces exposed on the first end face 17 side of the first internal terminal conductor 29 and the second end face 18 side of the second internal terminal conductor 30 appear. On the other hand, according to the cut along a cutting line (not shown) orthogonal to the cutting line 47, the surfaces exposed on the mounting surface 13 side of each of the first internal terminal conductor 29 and the second internal terminal conductor 30 appear.

[0106] With the non-conductive material layer 19 containing glass, the laminated chip is then fired. The resulting component body 12 is then subjected to tumbling grinding as needed to form the external terminal conductors 31 and 32, thus completing the inductor 11.

[0107] [Second Implementation]

[0108] Reference Figure 7 and Figure 8 The inductor 11a of the second embodiment of the present invention will be described. Figure 7 Is with Figure 2 The corresponding diagram. (and) Figure 4 The situation is the same. Figure 8 This is a cross-sectional view of inductor 11a, showing its relationship with the inductor along... Figure 1 The cross-section of surface BB is equivalent to the cross-section of surface BB. Figure 7 and Figure 8 In the middle, to and Figure 2 and Figure 4 Elements shown that are equivalent to each other are labeled with the same reference numerals, and repeated descriptions are omitted.

[0109] and Figure 2 and Figure 4 Comparison of the inductor 11 shown, Figure 7 and Figure 8In the inductor 11a shown, the anchor conductor has different positions and extension directions.

[0110] To explain more specifically, in inductor 11a, the first anchoring conductor 37 extends along the mounting surface 13 of the component body 12 from the first internal terminal conductor 29 toward the second end face 18, and the second anchoring conductor 38 extends along the mounting surface 13 from the second internal terminal conductor 30 toward the first end face 17. Therefore, it is particularly expected that the increased fixing force of the internal terminal conductors 29 and 30 relative to the component body 12 near the mounting surface 13 will prevent the internal terminal conductors 29 and 30 from detaching due to thermal shock during the reflow soldering process during installation. Furthermore, the increased fixing force based on the anchoring conductors 37 and 38 is further enhanced when the force applied to the internal terminal conductors 29 and 30 is along the mounting surface 13 of the component body 12.

[0111] In this inductor 11a, with reference Figure 2 and Figure 4 The situation is similar for inductor 11, where the first anchoring conductor 37 and the second anchoring conductor 38 are disposed at the interface between adjacent layers of the plurality of non-conductive material layers 19. In this case, as... Figure 8 As shown, a plurality of first anchoring conductors 37 and a plurality of second anchoring conductors 38 are formed from the first internal terminal conductor 29 and the second internal terminal conductor 30, respectively, into a plurality of strip-shaped conductors extending in a strip shape. That is, a non-conductive material layer 19 is sandwiched between adjacent conductors of the plurality of strip-shaped conductors. With this structure, the contact area between the anchoring conductors 37, 38 and the component body 12 can be increased, and the fixing force of the internal terminal conductors 29, 30 relative to the component body 12 can be further improved.

[0112] In addition, such as Figure 7 and Figure 8 As shown, the plurality of strip conductors formed by the first anchor conductor 37 extend parallel to each other and have end positions at different distances from each other up to the second end face 18 of the component body 12. Similarly, the plurality of strip conductors formed by the second anchor conductor 38 extend parallel to each other and have end positions at different distances from each other up to the first end face 17 of the component body 12. In short, the strip conductors formed by anchor conductors 37-1, 37-3, 37-5, 37-7, 38-1, 38-3, 38-5, and 38-7 are longer than the strip conductors formed by anchor conductors 37-2, 37-4, 37-6, 38-2, 38-4, and 38-6. With this structure, stress concentration caused, for example, by thermal shock can be mitigated, thus making it less likely for the internal terminal conductors 29 and 30 to detach.

[0113] in addition, Figure 7 and Figure 8 The anchoring conductors 37 and 38 shown have the following characteristics: the first anchoring conductors 37-1, 37-3, 37-5, and 37-7 forming longer strip conductors and the second anchoring conductors 38-1, 38-3, 38-5, and 38-7 forming longer strip conductors are respectively opposite to each other; the first anchoring conductors 37-2, 37-4, and 37-6 forming shorter strip conductors and the second anchoring conductors 38-2, 38-4, and 38-6 forming shorter strip conductors are respectively opposite to each other.

[0114] Furthermore, multiple strip conductors can be not only of the two lengths of longer and shorter ones, but also of three or more lengths.

[0115] The first anchoring conductor 37 and the second anchoring conductor 38 may not be disposed at the interface between adjacent layers of the plurality of non-conductive material layers 19 as described above. Although not shown, they may be disposed in a manner that penetrates the non-conductive material layers 19 along the stacking direction. Thus, the plurality of first anchoring conductors 37 and the plurality of second anchoring conductors 38 extend wide from the first internal terminal conductor 29 and the second internal terminal conductor 30, respectively. In this case, the distances from the respective ends of the plurality of first anchoring conductors 37 and the plurality of second anchoring conductors 38 to the first end face 17 or the second end face 18 of the component body 12 may be different. According to this structure, the contact area between the anchoring conductors 37, 38 and the component body 12 can be increased, and stress concentration caused by, for example, thermal shock can be mitigated, thereby further improving the fixing force of the internal terminal conductors 29, 30 relative to the component body 12.

[0116] In addition, the first anchoring conductor 37 and the second anchoring conductor 38 may also be mixed together in the portion disposed at the interface between adjacent layers of the plurality of non-conductive material layers 19 and in the portion disposed in a state that penetrates the non-conductive material layers 19 along the stacking direction.

[0117] For anchor conductors 37 and 38, the following can also be used: Figure 9 The first variation shown or Figure 10 The second variation shown.

[0118] Figure 9 The first variant shown has the following features: the first anchoring conductors 37-1, 37-3, 37-5, and 37-7 forming longer strip conductors and the second anchoring conductors 38-1, 38-3, 38-5, and 38-7 forming shorter strip conductors are respectively opposite to each other; the first anchoring conductors 37-2, 37-4, and 37-6 forming shorter strip conductors and the second anchoring conductors 38-2, 38-4, and 38-6 forming longer strip conductors are respectively opposite to each other.

[0119] Figure 10The second variation shown has the ability to make Figure 9 The first modified example shown is a special feature of the aforementioned characteristics. More specifically, the first anchoring conductor 37-3 forming the longer strip conductor is located between the second anchoring conductors 38-2 and 38-4 forming the longer strip conductor, and the first anchoring conductor 37-5 forming the longer strip conductor is located between the second anchoring conductors 38-4 and 38-6 forming the longer strip conductor. In addition, the second anchoring conductor 38-2 forming the longer strip conductor is located between the first anchoring conductors 37-1 and 37-3 forming the longer strip conductor, the second anchoring conductor 38-4 forming the longer strip conductor is located between the first anchoring conductors 37-3 and 37-5 forming the longer strip conductor, and the second anchoring conductor 38-6 forming the longer strip conductor is located between the first anchoring conductors 37-5 and 37-7 forming the longer strip conductor.

[0120] That is, the second modification has the following features: the end portion of the strip conductor formed by the first anchor conductor 37 includes a portion located between adjacent conductors of the plurality of strip conductors formed by the second anchor conductor 38, and the end portion of the strip conductor formed by the second anchor conductor 38 includes a portion located between adjacent conductors of the plurality of strip conductors formed by the first anchor conductor 37.

[0121] According to the second modification, the plurality of first anchor conductors 37 and the plurality of second anchor conductors 38 are positioned to interlock with each other, which not only alleviates stress concentration caused by thermal shock, but also increases the fixing force of the internal terminal conductors 29 and 30 relative to the component body 12, thus making it less likely for the internal terminal conductors 29 and 30 to fall off.

[0122] [Third Implementation]

[0123] Reference Figure 11 The inductor 11b of the third embodiment of the present invention will be described. Figure 11 Is with Figure 2 The corresponding diagram. Figure 11 In the middle, to and Figure 2 Elements shown that are equivalent to each other are labeled with the same reference numerals, and repeated descriptions are omitted.

[0124] In short, Figure 11 The first feature of the inductor 11b shown is that, compared with the aforementioned inductors 11 and 11a, it has a portion with a larger inner diameter of the coil conductor 20.

[0125] Reference Figure 11Similar to inductors 11 and 11a, inductor 11b includes a component body 12. The 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, respectively.

[0126] The main body 12 of the component has a stacked structure consisting of multiple non-conductive material layers 19. The multiple non-conductive material layers 19 extend along the extension directions of the first end face 17 and the second end face 18, and are stacked in a direction parallel to the mounting surface 13.

[0127] A coil conductor 20 extending in a spiral shape is disposed inside the component body 12. The coil conductor 20 has a first end 21 and a second end 22 that are opposite to each other, and between the first end 21 and the second end 22, there are multiple winding portions 23 extending along a portion of an annular track formed at any interface of a plurality of non-conductive material layers 19, and multiple through-hole conductors 24 penetrating any one of the non-conductive material layers 19 in the thickness direction. In the coil conductor 20, the aforementioned winding portions 23 and through-hole conductors 24 are formed in a spiral shape by alternating connections. At each end of the plurality of winding portions 23, a relatively large-area through-pad 25 is provided for connection with the through-hole conductor 24. Figure 11 In the diagram, a single-dot dashed line indicates the electrical connection state of the through-hole conductor 24.

[0128] A first lead conductor 27 and a second lead conductor 28 are connected to the first end 21 and the second end 22 of the coil conductor 20, respectively. A first internal terminal conductor 29 and a second internal terminal conductor 30 are connected to the first lead conductor 27 and the second lead conductor 28, respectively. The internal terminal conductors 29 and 30 are arranged to be embedded inside the component body 12, and are partially exposed on the outer surface of the component body 12.

[0129] In this embodiment, the first internal terminal conductor 29 and the second internal terminal conductor 30 are also exposed on the mounting surface 13 of the component body 12, respectively on the first end face 17 side and the second end face 18 side, spaced apart from each other. The first internal terminal conductor 29 is connected to the portion exposed on the mounting surface 13 and is exposed on the first end face 17, and the second internal terminal conductor 30 is connected to the portion exposed on the mounting surface 13 and is exposed on the second end face 18.

[0130] Although not shown in the figure, it is also possible that external terminal conductors are provided to cover the exposed portions of the first internal terminal conductor 29 and the second internal terminal conductor 30 respectively.

[0131] In the following description, when it is necessary to describe a specific layer among the multiple non-conductive material layers 19, reference numerals with subdivided numbers such as "19-1", "19-2", etc. are used. Furthermore, the same reference numerals are used for multiple winding portions 23, multiple via conductors 24, multiple through pads 25, etc., as in the case of the non-conductive material layers 19 described above.

[0132] Figure 11 The figure shows 12 non-conductive material layers 19-1, 19-2, ..., 19-12. These non-conductive material layers 19-1, 19-2, ..., 19-12 are stacked sequentially from the first side 15 toward the second side 16.

[0133] The non-conductive material layers 19-1 and 19-12 located at the outermost ends are given different colors from the other non-conductive material layers 19 by adding pigments such as cobalt.

[0134] The following description, regarding the formation of conductors such as coil conductor 20, will proceed in order from non-conductive material layer 19-1 to non-conductive material layer 19-12. Furthermore, in Figure 11 In the inductor 11b shown, the positional relationship between the first lead conductor 27 and the second lead conductor 28 is the same as... Figure 2 The inductor 11 shown is in reverse order on the left and right.

[0135] <1>

[0136] In the non-conductive material layers 19-2 to 19-4, the second terminal conductor sheets 30-1 to 30-3, which are part of the second internal terminal conductor 30, are respectively arranged to penetrate the non-conductive material layers 19-2 to 19-4 in the thickness direction, i.e., the stacking direction.

[0137] Although not shown in the figure, in the non-conductive material layers 19-2 to 19-4, the first terminal conductor sheet, which is part of the first internal terminal conductor 29, is also provided in a position symmetrical to the second terminal conductor sheets 30-1 to 30-3.

[0138] <2>

[0139] At the interface between the non-conductive material layers 19-4 and 19-5, a first lead conductor 27 and a winding portion 23-1 with less than one turn connected thereto are provided, and a pass pad 25-1 is provided at the end of the winding portion 23-1. Although details are not shown, a via conductor 24-1 penetrating the non-conductive material layer 19-5 along the thickness direction is provided for connection to the pass pad 25-1. The first lead conductor 27 is connected to the first internal terminal conductor 29.

[0140] In the non-conductive material layer 19-5, the first terminal conductor sheet 29-4, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-4, which is part of the second internal terminal conductor 30, are arranged to penetrate the non-conductive material layer 19-5 in the thickness direction.

[0141] <3>

[0142] At the interface between the non-conductive material layers 19-5 and 19-6, a winding portion 23-2 with less than one turn is provided, and pass-through pads 25-2 and 25-3 are provided at both ends of the winding portion 23-2. The pass-through pad 25-2 is connected to the aforementioned via conductor 24-1. On the other hand, a via conductor 24-2 penetrating the non-conductive material layer 19-6 along the thickness direction is provided for connection with the pass-through pad 25-3.

[0143] In the non-conductive material layer 19-6, the first terminal conductor sheet 29-5, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-5, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0144] Furthermore, at the interface between the non-conductive material layers 19-5 and 19-6, a first anchoring conductor 35-1 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-1 extending from the second internal terminal conductor 30 are provided.

[0145] <4>

[0146] At the interface between the non-conductive material layers 19-6 and 19-7, a winding portion 23-3 with less than one turn is provided, and pass-through pads 25-4 and 25-5 are provided at both ends of the winding portion 23-3. The pass-through pad 25-4 is connected to the aforementioned via conductor 24-2. On the other hand, a via conductor 24-3 penetrating the non-conductive material layer 19-7 along the thickness direction is provided for connection with the pass-through pad 25-5.

[0147] In the non-conductive material layer 19-7, the first terminal conductor sheet 29-6, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-6, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0148] <5>

[0149] At the interface between the non-conductive material layers 19-7 and 19-8, a winding portion 23-4 with less than one turn is provided, and pass-through pads 25-6 and 25-7 are provided at both ends of the winding portion 23-4. The pass-through pad 25-6 is connected to the aforementioned via conductor 24-3. On the other hand, a via conductor 24-4 penetrating the non-conductive material layer 19-8 along the thickness direction is provided for connection with the pass-through pad 25-7.

[0150] In the non-conductive material layer 19-8, the first terminal conductor sheet 29-7, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-7, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0151] Furthermore, at the interface between the non-conductive material layers 19-7 and 19-8, a first anchoring conductor 35-2 extending from the first internal terminal conductor 29 and a second anchoring conductor 36-2 extending from the second internal terminal conductor 30 are provided.

[0152] <6>

[0153] At the interface between the non-conductive material layers 19-8 and 19-9, a winding portion 23-5 with more than one turn and a second lead conductor 28 connected thereto are provided, and a pass pad 25-8 is provided at the end of the winding portion 23-5. The pass pad 25-8 is connected to the aforementioned through-hole conductor 24-4. The second lead conductor 28 is connected to the second internal terminal conductor 30.

[0154] In the non-conductive material layer 19-9, the first terminal conductor sheet 29-8, which is part of the first internal terminal conductor 29, and the second terminal conductor sheet 30-8, which is part of the second internal terminal conductor 30, are arranged in a state that extends through the material in the thickness direction.

[0155] <7>

[0156] In the non-conductive material layers 19-10 and 19-11, the second terminal conductor sheets 30-9 and 30-10, which are part of the second internal terminal conductor 30, are respectively arranged in a state where the non-conductive material layers 19-10 and 19-11 are penetrated in the thickness direction.

[0157] Although not shown in the figure, in the non-conductive material layers 19-10 and 19-11, the first terminal conductor sheet, which is part of the first internal terminal conductor 29, is also provided in a position symmetrical to the second terminal conductor sheets 30-9 and 30-10.

[0158] In the inductor 11b having the above-described structure, the winding portions 23-1, 23-3, and 23-5 have a larger inner diameter than the winding portions 23-2 and 23-4. That is, summarizing the structure of the inductor 11b, it is characterized in that, when the component body 12 is viewed from the first side 15 toward the second side 16, the coil conductor 20 overlaps with at least one of the first lead conductor 27 and the second lead conductor 28, or has a winding portion 23 that is closer to the outer surface of the component body 12 than at least one of the first lead conductor 27 and the second lead conductor 28.

[0159] As described above, if the inner diameter of the winding portion 23 of the coil conductor 20 is increased, the inductance value obtained through the inductor 11b can be increased, and the Q value can be improved.

[0160] The inductor 11b also has the following characteristic: At each interface between the non-conductive material layers 19 of the winding portions 23-1, 23-3, and 23-5, where the inner diameters are respectively increased, space is provided to accommodate the anchor conductor 35 in order to increase the inner diameter of the winding portion 23. Therefore, the anchor conductor 35 is only provided at each interface between the non-conductive material layers 19 of the winding portions 23-2 and 23-4, where the inner diameter is not increased.

[0161] Based on the above, it seems to imply that... Figure 11 In the inductor 11b shown, it is not possible to simultaneously increase the inner diameter of the winding portion and provide an anchor conductor. However, as a variation of the third embodiment, it is possible to simultaneously increase the inner diameter of the winding portion and provide an anchor conductor at a specific interface between the non-conductive material layers 19. That is, if the inner diameter of the winding portion is expanded only on the first end face 17 side, for example, and an anchor conductor is provided on the second end face 18 side, it is possible to simultaneously increase the inner diameter of the winding portion and provide an anchor conductor.

[0162] In addition, such as Figure 7 As shown, if the anchor conductors 37 and 38 are moved to a position along the mounting surface 13, the inner diameter of the winding portion 23 can be increased without hindering the anchor conductors 37 and 38, thus balancing the increase in the inner diameter of the winding portion and the installation of the anchor conductors.

[0163] The above description has been provided in relation to the embodiments of the present invention illustrated in the figures. However, various other modifications are possible within the scope of the present invention. Furthermore, the embodiments and modifications described in this specification are illustrative, and structural substitutions or combinations can be made between the embodiments and modifications.

Claims

1. An inductor, characterized in that, have: The main body of the component is made of non-conductive material; A coil conductor, disposed inside the main body of the component, having a first end and a second end opposite to each other, and a winding portion between the first end and the second end; The first lead conductor and the second lead conductor are respectively connected to the first end and the second end of the coil conductor; as well as The first internal terminal conductor and the second internal terminal conductor are respectively connected to the first lead conductor and the second lead conductor, and are configured to be embedded inside the component body, and partially exposed on the outer surface of the component body. The main body of the component includes: a mounting surface facing the mounting substrate, a top surface facing the mounting surface, a first side surface and a second side surface connecting the mounting surface and the top surface and facing each other, and a first end surface and a second end surface connecting the mounting surface and the top surface and the first side surface and the second side surface and facing each other, respectively. The first internal terminal conductor and the second internal terminal conductor are exposed at the mounting surface at a distance from each other, on the first end face side and the second end face side, respectively. The first internal terminal conductor is connected to the portion exposed on the mounting surface and is exposed on the first end face, and the second internal terminal conductor is connected to the portion exposed on the mounting surface and is exposed on the second end face. The coil axis provided by the coil conductor extends in a direction parallel to the mounting surface. When the component body is viewed from the first side toward the second side, the coil conductor has a winding portion that overlaps with at least one of the first lead conductor and the second lead conductor, or is closer to the outer surface of the component body than at least one of the first lead conductor and the second lead conductor. When the component body is viewed from the top surface, the winding portion has a repeating portion that is the same as the portion of the first internal terminal conductor exposed on the first end face, the repeating portion extending linearly from the top surface toward the mounting surface. The winding section has multiple parts. When viewing the main body of the component from the first side towards the second side, Compared to the portion of the winding portion that does not have the repeating portion, which extends in a straight line from the top surface toward the mounting surface on the side of the first end face, the repeating portion is located on the side of the first end face.

2. The inductor according to claim 1, characterized in that, The main body of the component includes: a plurality of non-conductive material layers extending along the extension directions of the first side and the second side and stacked in a direction parallel to the mounting surface, wherein the first internal terminal conductor and the second internal terminal conductor are arranged to penetrate the plurality of non-conductive material layers in the stacking direction.

3. The inductor according to claim 1 or 2, characterized in that, The first lead-out conductor extends in a straight line and is connected to the first end of the coil conductor, and the second lead-out conductor extends in a straight line and is connected to the second end of the coil conductor.

4. The inductor according to claim 3, characterized in that, The first lead conductor is connected to the end of the portion of the first internal terminal conductor exposed on the first end face near the top surface, and the second lead conductor is connected to the end of the portion of the second internal terminal conductor exposed on the second end face near the top surface.

5. An inductor, characterized in that, have: The main body of the component is made of non-conductive material; A coil conductor, disposed inside the main body of the component, having a first end and a second end opposite to each other, and a winding portion between the first end and the second end; The first lead conductor and the second lead conductor are respectively connected to the first end and the second end of the coil conductor; as well as The first internal terminal conductor and the second internal terminal conductor are respectively connected to the first lead conductor and the second lead conductor, and are configured to be embedded inside the component body, and partially exposed on the outer surface of the component body. The first lead-out conductor extends in a straight line and is connected to the first internal terminal conductor; the second lead-out conductor extends in a straight line and is connected to the second internal terminal conductor. The main body of the component includes: a mounting surface facing the mounting substrate, a top surface facing the mounting surface, a first side surface and a second side surface connecting the mounting surface and the top surface and facing each other, and a first end surface and a second end surface connecting the mounting surface and the top surface and the first side surface and the second side surface and facing each other, respectively. When the component body is viewed from the top surface, the winding portion has a repeating portion that is the same as the portion of the first internal terminal conductor exposed on the first end face, the repeating portion extending linearly from the top surface toward the mounting surface. The winding section has multiple parts. When viewing the main body of the component from the first side towards the second side, Compared to the portion of the winding portion that does not have the repeating portion, which extends in a straight line from the top surface toward the mounting surface on the side of the first end face, the repeating portion is located on the side of the first end face.

6. The inductor according to claim 5, characterized in that, The first internal terminal conductor and the second internal terminal conductor are exposed at the mounting surface at a distance from each other, on the first end face side and the second end face side, respectively. The first internal terminal conductor is connected to the portion exposed on the mounting surface and is exposed on the first end face, and the second internal terminal conductor is connected to the portion exposed on the mounting surface and is exposed on the second end face. The first lead conductor is connected to the end of the portion of the first internal terminal conductor exposed on the first end face near the top surface, and the second lead conductor is connected to the end of the portion of the second internal terminal conductor exposed on the second end face near the top surface.

7. The inductor according to claim 6, characterized in that, The first end and the second end of the coil conductor are located on the top surface side of the component body.

8. The inductor according to claim 5, characterized in that, It has a first anchoring conductor and a second anchoring conductor, which extend from the first internal terminal conductor and the second internal terminal conductor respectively when in contact with the main body of the component, but are not connected to the coil conductor.

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