Laminated structure and inductor

Abstract

To prevent magnetization in a laminated structure from becoming constant at 0 even when a magnetic field is applied from the outside in the length direction of the laminated structure in which a magnetic material layer and a non-magnetic material layer are laminated.SOLUTION: A laminated structural body 1 includes a non-magnetic layer 120, an upper soft magnetic layer 120T in contact with an upper surface 14a of the non-magnetic layer 120, a lower soft magnetic layer 120B in contact with a lower surface 14b of the non-magnetic layer 120, and coupling soft magnetic layers 14a and 14b coupled to the upper soft magnetic layer 16a and the lower soft magnetic layer 16b. The coupling soft magnetic layers 16a and 16b are in contact with the first side surface 120S1 and the second side surface 120S2 of the nonmagnetic layer 120. The first side 120S1 and the second side 120S2 are spaced apart from each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an inductor core. [Background technology]

[0002] Conventionally, laminated structures in which magnetic layers and non-magnetic layers are stacked have been known (see, for example, Patent Documents 1 to 3). It is also known that such laminated structures are used as cores of inductors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-015909 [Patent Document 2] Japanese Patent Application Publication No. 2023-136104 [Patent Document 3] Japanese Patent Application Laid-Open No. 2011-014919 Summary of the Invention [Problem to be solved by the invention]

[0004] However, even if a magnetic field is applied from the outside in the longitudinal direction of the laminated structure according to the above-described conventional technology, if the magnetic field is weak, the magnetization in the laminated structure will not change and will remain constant at 0.

[0005] Therefore, an object of the present invention is to prevent the magnetization in a laminated structure formed by stacking magnetic layers and non-magnetic layers from becoming constant at 0 even when an external magnetic field is applied in the longitudinal direction of the laminated structure. [Means for solving the problem]

[0006] The laminated structure of the present invention comprises a non-magnetic layer, an upper soft magnetic layer in contact with the upper surface of the non-magnetic layer, a lower soft magnetic layer in contact with the lower surface of the non-magnetic layer, and a coupling soft magnetic layer that couples the upper soft magnetic layer and the lower soft magnetic layer, wherein the coupling soft magnetic layer is in contact with a first side surface and a second side surface of the non-magnetic layer, and the first side surface and the second side surface are spaced apart from each other.

[0007] The laminated structure configured as described above includes a non-magnetic layer. An upper soft magnetic layer contacts the upper surface of the non-magnetic layer. A lower soft magnetic layer contacts the lower surface of the non-magnetic layer. A coupling soft magnetic layer couples the upper soft magnetic layer and the lower soft magnetic layer. The coupling soft magnetic layer contacts a first side surface and a second side surface of the non-magnetic layer. The first side surface and the second side surface are spaced apart from each other.

[0008] In the laminated structure according to the present invention, the non-magnetic layer may be a single layer.

[0009] In addition, in the laminated structure of the present invention, the non-magnetic layer may have an uppermost non-magnetic layer and a lowermost non-magnetic layer, the upper soft magnetic layer being in contact with the upper surface of the uppermost non-magnetic layer, and the lower soft magnetic layer being in contact with the lower surface of the lowermost non-magnetic layer.

[0010] In addition, the laminated structure of the present invention may be configured so that the laminated structure extends in the longitudinal direction, and the longitudinal direction intersects both the normal direction of the upper surface or the lower surface and the normal direction of the first side surface or the second side surface.

[0011] The laminated structure according to the present invention may have a linear longitudinal direction.

[0012] The laminated structure according to the present invention may have a curved longitudinal direction.

[0013] The laminated structure according to the present invention may be annular, with the first side surface disposed on the inside and the second side surface disposed on the outside.

[0014] In the multilayer structure according to the present invention, the coupling soft magnetic layer may be in contact with both the first side surface and the second side surface.

[0015] In the multilayer structure according to the present invention, the coupling soft magnetic layer may be in contact with parts of the first side surface and the second side surface.

[0016] In addition, in the laminated structure of the present invention, the non-magnetic layer may have a plurality of end faces that intersect with the upper surface, the lower surface, the first side surface, and the second side surface, and one or more of the end faces may be exposed.

[0017] The inductor according to the present invention uses the laminated structure according to the present invention as a core. [Brief explanation of the drawings]

[0018] [Figure 1] 1A is a perspective view of a multilayer structure 1 according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line bb. [Figure 2] 10 is a diagram showing the magnetization direction M1 when the external magnetic field applied to the multilayer structure 1 is 0. FIG. [Figure 3] 2 is a diagram showing an outline of the correspondence between an external magnetic field applied to the multilayer structure 1 and the magnetization of the multilayer structure 1. FIG. [Figure 4] 4(a) is a plan view of a multilayer structure 1 according to a first modification of the first embodiment, and FIG. 4(b) is a cross-sectional view taken along the line bb. [Figure 5] FIG. 10 is a cross-sectional view of the laminated structure 1 according to Modification 2 of the first embodiment, taken along the line bb. [Figure 6] FIG. 10 is a cross-sectional view of the laminated structure 1 according to Modification 3 of the first embodiment, taken along the line bb. [Figure 7] 7(a) is a plan view of a multilayer structure 1 according to a second embodiment of the present invention, and FIG. 7(b) is a cross-sectional view taken along line bb. [Figure 8]8(a) is a plan view of a multilayer structure 1 according to a modified example of the second embodiment, and FIG. 8(b) is a cross-sectional view taken along the line bb. [Figure 9] FIG. 1 is a plan view of a multilayer structure 1 according to a third embodiment of the present invention. [Figure 10] FIG. 10 is a plan view of a multilayer structure 1 according to a modified example of the third embodiment. [Figure 11] 11(a) is a perspective view of a multilayer structure 1 according to a fourth embodiment of the present invention, FIG. 11(b) is a cross-sectional view taken along line bb, and FIG. 11(c) is a cross-sectional view taken along line cc. [Figure 12] 12(a) is a perspective view of a laminated structure (comparative example) 2, and FIG. 12(b) is a cross-sectional view taken along the line bb. [Figure 13] 10 is a diagram showing an outline of the correspondence between an external magnetic field applied to a laminated structure (comparative example) 2 and the magnetization of the laminated structure (comparative example) 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] First embodiment FIG. 1 is a perspective view (FIG. 1(a)) and a bb cross-sectional view (FIG. 1(b)) of a multilayer structure 1 according to a first embodiment of the present invention. In FIG. 1, the X direction is the width direction of the multilayer structure 1, the Y direction is the height direction of the multilayer structure 1, and the Z direction is the depth direction (longitudinal direction) of the multilayer structure 1. The X direction, Y direction, and Z direction are perpendicular to each other. A magnetic field is applied from outside the multilayer structure 1 in the Z direction. The bb cross-sectional view is a cross-section of the multilayer structure 1 taken on the XY plane.

[0021] The multilayer structure 1 according to the first embodiment includes a non-magnetic layer 120, an upper soft magnetic layer 14a, a lower soft magnetic layer 14b, and coupling soft magnetic layers 16a and 16b. The multilayer structure 1 according to the first embodiment can be used as a core of an inductor.

[0022] The nonmagnetic layer 120 is a layer of a nonmagnetic material (for example, a diamagnetic material (for example, copper or zinc) or a paramagnetic material (for example, aluminum or platinum)). The nonmagnetic layer 120 is, for example, a copper layer. The nonmagnetic layer 120 is a single layer.

[0023] The nonmagnetic layer 120 has an upper surface 120T, a lower surface 120B, a first side surface 120S1, a second side surface 120S2, an end surface 120E1, and an end surface 120E2. The first side surface 120S1 and the second side surface 120S2 are spaced apart from each other. The end surface 120E1 and the end surface 120E2 are both exposed and visible from the outside. The normal direction of the end surface 120E1 and the end surface 120E2 is the Z direction. The nonmagnetic layer 120 has a plurality of end surfaces 120E1 and 120E2 that intersect with the upper surface 120T, the lower surface 120B, the first side surface 120S1, and the second side surface 120S2.

[0024] The nonmagnetic layer 120 is a rectangular parallelepiped, with the top surface 120T and bottom surface 120B parallel to each other, the first side surface 120S1 and second side surface 120S2 parallel to each other, and the end surface 120E1 and end surface 120E2 parallel to each other.

[0025] The normal direction to the upper surface 120T and the lower surface 120B is the Y direction. The normal direction to the first side surface 120S1 and the second side surface 120S2 is the X direction. The longitudinal direction Z intersects with both the X direction and the Y direction. The laminated structure 1 extends in the longitudinal direction Z. The longitudinal direction Z is linear.

[0026] The upper soft magnetic layer 14a is a layer in contact with the top surface 120T of the non-magnetic layer 120. The lower soft magnetic layer 14b is a layer in contact with the bottom surface 120B of the non-magnetic layer 120.

[0027] The coupling soft magnetic layers 16a and 16b are layers that couple the upper soft magnetic layer 14a and the lower soft magnetic layer 14b. The coupling soft magnetic layer 16a contacts the entire first side surface 120S1 of the non-magnetic layer 120. The coupling soft magnetic layer 16b contacts the entire second side surface 120S2 of the non-magnetic layer 120. In other words, the coupling soft magnetic layers 16a and 16b contact the entire first side surface 120S1 and the entire second side surface 120S2.

[0028] The upper soft magnetic layer 14a, the lower soft magnetic layer 14b, the coupling soft magnetic layer 16a, and the coupling soft magnetic layer 16b may be an integrated soft magnetic material (e.g., Co-Fe alloy, iron, nickel, or cobalt). In this case, for example, the Co-Fe alloy may encase copper (the non-magnetic layer 120).

[0029] Next, the operation of the first embodiment will be described.

[0030] Fig. 2 is a diagram showing the magnetization direction M1 when the external magnetic field applied to the multilayer structure 1 is 0. Fig. 2 corresponds to Fig. 1(b). Fig. 3 is a diagram showing an outline of the correspondence between the external magnetic field applied to the multilayer structure 1 and the magnetization of the multilayer structure 1.

[0031] The left end of the upper soft magnetic layer 14a and the left end of the lower soft magnetic layer 14b are connected by the coupling soft magnetic layer 16a, and the right end of the upper soft magnetic layer 14a and the right end of the lower soft magnetic layer 14b are connected by the coupling soft magnetic layer 16b, so that the soft magnetic bodies (the upper soft magnetic layer 14a, the lower soft magnetic layer 14b, the coupling soft magnetic layer 16a, and the coupling soft magnetic layer 16b) in the bb cross section (see FIGS. 1(b) and 2) of the multilayer structure 1 have a ring (toroidal shape). As a result, the demagnetizing factor in the width direction (X direction) of the multilayer structure 1 is approximately 0, and the width direction (X direction) is the direction in which magnetization is easiest.

[0032] Therefore, referring to FIG. 2, when the external magnetic field applied to the stacked structure 1 is 0, the magnetization direction M1 is a direction that rotates clockwise around the soft magnetic material (the upper soft magnetic layer 14a in the +X direction, the coupling soft magnetic layer 16b in the -Y direction, the lower soft magnetic layer 14b in the -X direction, and the coupling soft magnetic layer 16a in the +Y direction), and is perpendicular to the direction in which the external magnetic field is applied (the Z direction).

[0033] Here, when a magnetic field is applied to the laminated structure 1 from the outside in the Z direction, there is no need to break the stable magnetization (magnetization direction M1). Therefore, referring to Figure 3, there is no region where the magnetization M in the laminated structure 1 is constant at 0 (see regions A1 and A2 in Figure 13), and the magnetization M changes linearly with the external magnetic field H.

[0034] 12A and 12B are a perspective view and a bb cross-sectional view, respectively, of the laminated structure (comparative example) 2. The bb cross-section is a cross-section of the laminated structure (comparative example) 2 taken along the YZ plane. FIG. 13 is a diagram showing an outline of the correspondence between the external magnetic field applied to the laminated structure (comparative example) 2 and the magnetization of the laminated structure (comparative example) 2.

[0035] The stacked structure (comparative example) 2 shown in FIG. 12 includes a non-magnetic layer 220, an upper soft magnetic layer 24a, and a lower soft magnetic layer 24b. The non-magnetic layer 220, the upper soft magnetic layer 24a, and the lower soft magnetic layer 24b are similar to the non-magnetic layer 120, the upper soft magnetic layer 14a, and the lower soft magnetic layer 14b, respectively. However, there are no members corresponding to the coupling soft magnetic layers 16a and 16b. Therefore, the upper soft magnetic layer 24a and the lower soft magnetic layer 24b are not coupled by a soft magnetic material.

[0036] Therefore, referring to Figure 12(b), when the external magnetic field applied to the stacked structure (comparison example) 2 is 0, the magnetization direction M2 is opposite to each other in the upper soft magnetic layer 24a and the lower soft magnetic layer 24 (-Z direction for the upper soft magnetic layer 24a and +Z direction for the lower soft magnetic layer 24b), and is stable in this state.

[0037] Here, when a magnetic field is applied from the outside in the Z direction to the laminated structure (comparison example) 2, it is necessary to break the stable magnetization in the Z direction (magnetization direction M2). Therefore, referring to Figure 13, there are regions in the laminated structure (comparison example) 2 where the magnetization M is constant at 0 (see regions A1 and A2 in Figure 13), and regions in which the magnetization M does not change linearly with the external magnetic field H (see regions A1 and A2 in Figure 13) are generated.

[0038] According to the first embodiment, the upper soft magnetic layer 14a and the lower soft magnetic layer 14b are connected by the coupling soft magnetic layer 16a and the coupling soft magnetic layer 16b, so that when the external magnetic field applied to the stacked structure 1 is zero, the magnetization direction M1 is stabilized in a direction perpendicular to the direction in which the external magnetic field is applied (Z direction).

[0039] Therefore, even if an external magnetic field is applied in the longitudinal direction Z of the laminated structure 1, there is no need to break the stable magnetization (magnetization direction M1), and it is possible to prevent the magnetization M in the laminated structure 1 from becoming constant at 0.

[0040] The first embodiment may be modified as follows.

[0041] <Variation 1> In the first embodiment, both the end face 120E1 and the end face 120E2 are exposed, but it is also possible to have either one of them exposed.

[0042] 4A and 4B are a plan view and a cross-sectional view taken along line bb, respectively, of a multilayer structure 1 according to Modification 1 of the first embodiment. Note that FIG. 4B is the same as FIG. 1B.

[0043] The layered structure 1 according to the first modification of the first embodiment includes a soft magnetic layer 18 (made of the same material as the upper soft magnetic layer 14a, the lower soft magnetic layer 14b, the coupling soft magnetic layer 16a, and the coupling soft magnetic layer 16b). The soft magnetic layer 18 covers the end face 120E2. The end face 120E2 is not exposed. Alternatively, the soft magnetic layer 18 may cover the end face 120E1 instead of the end face 120E2. Note that the configuration other than the soft magnetic layer 18 is the same as that of the first embodiment.

[0044] <Variation 2> In the first embodiment, the laminated structure 1 has a three-layer structure (from the top, upper soft magnetic layer 14a, non-magnetic layer 120, and lower soft magnetic layer 14b), but it may also have a five-layer structure (from the top, upper soft magnetic layer 14a, uppermost non-magnetic layer 124, soft magnetic layer 17, lowermost non-magnetic layer 122, and lower soft magnetic layer 14b).

[0045] 5 is a cross-sectional view of the multilayer structure 1 taken along line bb according to Modification 2 of the first embodiment. For the position of bb, see FIG. 1(a).

[0046] The stacked structure 1 according to the second modification of the first embodiment has an uppermost nonmagnetic layer 124 and a lowermost nonmagnetic layer 122 instead of the nonmagnetic layer 120 according to the first embodiment. The materials of the uppermost nonmagnetic layer 124 and the lowermost nonmagnetic layer 122 are the same as the material of the nonmagnetic layer 120.

[0047] The upper soft magnetic layer 14a contacts an upper surface 124T of the uppermost non-magnetic layer 124. The lower soft magnetic layer 14b contacts a lower surface 122B of the lowermost non-magnetic layer 122. A soft magnetic layer 17 is disposed between the uppermost non-magnetic layer 124 and the lowermost non-magnetic layer 122. The soft magnetic layer 17 is made of the same material as the upper soft magnetic layer 14a, the lower soft magnetic layer 14b, the coupling soft magnetic layer 16a, and the coupling soft magnetic layer 16b.

[0048] The coupling soft magnetic layer 16a is in contact with the entire first side surface 124S1 of the uppermost non-magnetic layer 124. The coupling soft magnetic layer 16a is in contact with the entire first side surface 122S1 of the lowermost non-magnetic layer 122.

[0049] Furthermore, the coupling soft magnetic layer 16b contacts the entire second side surface 124S2 of the uppermost non-magnetic layer 124. The coupling soft magnetic layer 16b contacts the entire second side surface 122S2 of the lowermost non-magnetic layer 122.

[0050] That is, the coupling soft magnetic layers 16a and 16b are in contact with all of the first side surfaces 122S1 and 124S1 and the second side surfaces 122S2 and 124S2.

[0051] Other than the above, the second embodiment is the same as the first embodiment.

[0052] <Variation 3> In the second modification of the first embodiment, the stacked structure 1 has a structure of five layers (from the top, upper soft magnetic layer 14a, uppermost non-magnetic layer 124, soft magnetic layer 17, lowermost non-magnetic layer 122, and lower soft magnetic layer 14b), but it may have a structure of seven or more layers (from the top, upper soft magnetic layer 14a, uppermost non-magnetic layer 124, soft magnetic layer 17, middle non-magnetic layer 126, soft magnetic layer 17, lowermost non-magnetic layer 122, and lower soft magnetic layer 14b).

[0053] 6 is a cross-sectional view of the multilayer structure 1 taken along line bb according to Modification 3 of the first embodiment. For the position of bb, see FIG. 1(a).

[0054] The stacked structure 1 according to the third modification of the first embodiment has an uppermost nonmagnetic layer 124, a lowermost nonmagnetic layer 122, and an intermediate nonmagnetic layer 126 instead of the nonmagnetic layer 120. The materials of the intermediate nonmagnetic layer 126, the uppermost nonmagnetic layer 124, and the lowermost nonmagnetic layer 122 are the same as the material of the nonmagnetic layer 120.

[0055] The upper soft magnetic layer 14a contacts an upper surface 124T of the uppermost non-magnetic layer 124. The lower soft magnetic layer 14b contacts a lower surface 122B of the lowermost non-magnetic layer 122. An intermediate non-magnetic layer 126 is disposed between the uppermost non-magnetic layer 124 and the lowermost non-magnetic layer 122. A soft magnetic layer 17 is disposed between the intermediate non-magnetic layers 126. The material of the soft magnetic layer 17 is the same as that in the second modification of the first embodiment.

[0056] The coupling soft magnetic layer 16a is in contact with the entire first side surface 124S1 of the uppermost non-magnetic layer 124. The coupling soft magnetic layer 16a is in contact with the entire first side surface 122S1 of the lowermost non-magnetic layer 122. The coupling soft magnetic layer 16a is in contact with the entire first side surface 126S1 of the middle non-magnetic layer 126.

[0057] Furthermore, the coupling soft magnetic layer 16b contacts the entire second side surface 124S2 of the uppermost non-magnetic layer 124. The coupling soft magnetic layer 16b contacts the entire second side surface 122S2 of the lowermost non-magnetic layer 122. The coupling soft magnetic layer 16b contacts the entire second side surface 126S2 of the middle non-magnetic layer 126.

[0058] That is, the coupling soft magnetic layers 16a and 16b are in contact with all of the first side surfaces 122S1, 124S1, and 126S1 and the second side surfaces 122S2, 124S2, and 126S2.

[0059] Although only one intermediate non-magnetic layer 126 is provided in the above embodiment, two or more layers may be provided (resulting in a total structure of nine or more layers). In this case, soft magnetic layers 17 are disposed between the intermediate non-magnetic layers 126.

[0060] Other than the above, the second embodiment is the same as the first embodiment.

[0061] Second embodiment The second embodiment differs from the multilayer structure 1 according to the first embodiment in that the multilayer structure 1 has a toroidal structure.

[0062] 7A and 7B are a plan view and a cross-sectional view taken along line bb, respectively, of a multilayer structure 1 according to a second embodiment of the present invention. Note that FIG. 7B is the same as FIG. 1B.

[0063] The laminated structure 1 according to the second embodiment is stretched in the longitudinal direction, but the longitudinal direction in the second embodiment is curved (for example, circular).

[0064] The multilayer structure 1 according to the second embodiment is annular. The first side surface 120S1 is disposed on the inside. The second side surface 120S2 is disposed on the outside. Note that other than the above, it is the same as the first embodiment.

[0065] According to the second embodiment, the same effects as those of the first embodiment are achieved.

[0066] The second embodiment may be modified as follows.

[0067] <Modification> In the second embodiment, the laminated structure 1 is a circular ring, but it may have corners as long as it is annular. For example, it may be a polygonal ring (with any number of corners) such as a triangular ring, a quadrilateral ring, a pentagonal ring, etc. For example, an example of a quadrilateral ring may be a rectangular ring (illustrated in FIG. 8).

[0068] FIG. 8 shows a plan view (FIG. 8(a)) and a cross-sectional view (FIG. 8(b)) of a multilayer structure 1 according to a modified example of the second embodiment. However, FIG. 8(b) is the same as FIG. 7(b). Note that other than the above, it is the same as the second embodiment.

[0069] Third embodiment The third embodiment differs from the multilayer structure 1 according to the second embodiment in that the multilayer structure 1 has a toroidal structure (however, a part of it is missing).

[0070] 9 is a plan view of a multilayer structure 1 according to a third embodiment of the present invention. This structure has a structure in which a portion of the right side of the multilayer structure 1 according to the second embodiment (see FIG. 7(a)) is missing. In the missing portion, end faces 120E1 and 120E2 are exposed, as in the first embodiment. However, as in Modification 1 of the first embodiment, either end face 120E1 or end face 120E2 may be exposed. Note that other than the above, this is the same as the second embodiment.

[0071] According to the third embodiment, the same effects as those of the first embodiment are achieved.

[0072] The third embodiment may be modified as follows.

[0073] <Modification> In the third embodiment, the laminated structure 1 is a circular ring (partially missing), but it may have corners as long as it is annular. For example, it may be a polygonal ring (partially missing) (with any number of corners) such as a triangular ring, a quadrangular ring, a pentagonal ring, etc. For example, an example of a quadrangular ring (partially missing) may be a rectangular ring (partially missing) (as shown in FIG. 10).

[0074] 10 is a plan view of a multilayer structure 1 according to a modification of the third embodiment. The multilayer structure 1 is a rectangular ring (partially missing). Note that other than the above, it is the same as the third embodiment.

[0075] Fourth embodiment The fourth embodiment differs from the multilayer structure 1 according to the first embodiment in that the coupling soft magnetic layer 16b has holes 13.

[0076] FIG. 11 shows a perspective view (FIG. 11(a)), a bb cross-sectional view (FIG. 11(b)), and a cc cross-sectional view (FIG. 11(c)) of a laminated structure 1 according to a fourth embodiment of the present invention. Note that FIG. 11(b) is the same as FIG. 1(b). The cc cross-sectional view is a cross-section of the laminated structure 1 in the XY plane at a portion where a hole 13 is provided. Note that, apart from the hole 13, the laminated structure 1 is the same as the first embodiment.

[0077] 11(a) and 11(c), the coupling soft magnetic layer 16b has a hole 13. The hole 13 penetrates the coupling soft magnetic layer 16b, so that a portion of the second side surface 120S2 is exposed and visible from the outside. Therefore, it can be said that the coupling soft magnetic layer 16b is in contact with a portion (but not the entirety) of the second side surface 120S2. This configuration also achieves the same effects as the first embodiment.

[0078] The coupling soft magnetic layer 16a may have holes 13 (penetrating the coupling soft magnetic layer 16a). In this case, the coupling soft magnetic layer 16a is in contact with part (not all) of the first side surface 120S1. This configuration also provides the same effects as the first embodiment.

[0079] The coupling soft magnetic layers 16a and 16b may also have holes 13. In this case, the coupling soft magnetic layer 16a is in contact with part (not all) of the first side surface 120S1, and the coupling soft magnetic layer 16b is in contact with part (not all) of the second side surface 120S2. This configuration also provides the same effects as the first embodiment.

[0080] According to the fourth embodiment, the same effects as those of the first embodiment are achieved. [Explanation of symbols]

[0081] 1. Laminated structure 120 Non-magnetic layer 120T top 120B Bottom 120S1, 122S1, 124S1 First side 120S2, 122S2, 124S2 second side 120E1, 120E2 end face 122 Bottom nonmagnetic layer 124 Top non-magnetic layer 126 Intermediate nonmagnetic layer 13 holes 14a Upper soft magnetic layer 14b Lower soft magnetic layer 16a, 16b Coupled soft magnetic layer 17, 18 Soft magnetic layer 2. Laminated structure (comparison example) 24a Upper soft magnetic layer 24b Lower soft magnetic layer M1, M2 magnetization direction

Claims

1. a nonmagnetic layer; an upper soft magnetic layer in contact with the upper surface of the nonmagnetic layer; a lower soft magnetic layer in contact with the lower surface of the nonmagnetic layer; a coupling soft magnetic layer coupling the upper soft magnetic layer and the lower soft magnetic layer; Equipped with the coupled soft magnetic layer is in contact with a first side surface and a second side surface of the nonmagnetic layer, A laminated structure wherein the first side and the second side are spaced apart from each other.

2. The laminated structure according to claim 1, A laminated structure in which the non-magnetic layer is a single layer.

3. The laminated structure according to claim 1, the non-magnetic layer has an uppermost non-magnetic layer and a lowermost non-magnetic layer, the upper soft magnetic layer is in contact with the top surface of the uppermost non-magnetic layer, The lower soft magnetic layer is in contact with the lower surface of the lowermost non-magnetic layer.

4. The laminated structure according to claim 1, The laminated structure is stretched in the longitudinal direction, A laminated structure in which the longitudinal direction intersects both the normal direction of the upper surface or the lower surface and the normal direction of the first side surface or the second side surface.

5. The laminated structure according to claim 4, The longitudinal direction of the laminated structure is linear.

6. The laminated structure according to claim 4, The laminated structure has a curved longitudinal direction.

7. The laminated structure according to claim 1, The laminated structure is annular, the first side is disposed inwardly; A laminated structure with the second side disposed on the outside.

8. The laminated structure according to claim 1, A laminated structure in which the coupling soft magnetic layer is in contact with both the first side surface and the second side surface.

9. The laminated structure according to claim 1, The laminated structure has the coupling soft magnetic layer in contact with the first side surface and a portion of the second side surface.

10. The laminated structure according to claim 1, the nonmagnetic layer has a plurality of end surfaces intersecting the upper surface, the lower surface, the first side surface, and the second side surface; A laminated structure in which at least one of the end faces is exposed.

11. An inductor using the laminated structure according to any one of claims 1 to 10 as a core.

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