Coupling inductor and manufacturing method thereof

Abstract

The invention discloses a coupling inductor, comprising: a first conductive body comprising a first side portion, a first upper portion and a second side portion, in which the first conductive body extends from the first side portion to the second side portion through the first upper portion; the second electric conductor comprises a third side part, a second upper part and a fourth side part, and the second electric conductor extends from the third side part to the fourth side part through the second upper part; and a molding body covering the first side portion, the first upper portion, and the second side portion of the first conductor.

Description

Technical Field

[0001] The present invention relates to a coupled inductor, and in particular to an inverse-coupling coupled inductor. Background Art

[0002] Conventional coupled inductors have two laterally-placed columns, with a coil wrapped around each of the two laterally-placed columns. This design sacrifices the volume of magnetic material to achieve the desired coefficient value, and is therefore not suitable for designs requiring small size.

[0003] Therefore, a better solution is needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a coupled inductor and a manufacturing method thereof.

[0005] The present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body, comprising a first side portion, a first upper portion and a second side portion, wherein the first conductive body extends from the first side portion to the second side portion via the first upper portion, wherein the first conductive body further comprises a first end portion and a second end portion, wherein the first end portion is bent from the first side portion and extends in a direction away from the second side portion, and the second end portion is bent from the second side portion and extends in a direction away from the second side portion. A first side portion extends in a direction; a second conductor comprises a third side portion, a second upper portion and a fourth side portion, wherein the second conductor extends from the third side portion to the fourth side portion via the second upper portion, wherein the second conductor further comprises a third end portion and a fourth end portion, wherein the third end portion is bent from the third side portion and extends in a direction toward the fourth side portion, and the fourth end portion is bent from the fourth side portion and extends in a direction toward the third side portion; and a molding body covering the first side portion, the first upper portion and the second side portion of the first conductor.

[0006] In one embodiment, in a horizontal plane passing through the first side portion and the third side portion, a cross-sectional area of ​​the first side portion is greater than a cross-sectional area of ​​the third side portion.

[0007] In one embodiment, a magnetic core is disposed in a hollow space of the second conductor.

[0008] In one embodiment, the package body covers the first conductor, the second conductor and the magnetic core.

[0009] In one embodiment, a material fills the space between the first end portion and the third end portion.

[0010] In one embodiment, the material is a magnetic material.

[0011] In one embodiment, the material is a polymer, an oxide or a ceramic material.

[0012] In one embodiment, the first electrical conductor is completely covered by a first insulating layer and the second electrical conductor is completely covered by a second insulating layer, wherein the first insulating layer is attached to the second insulating layer by an adhesive material.

[0013] In one embodiment, a lower surface of the first end portion is not covered by the first insulating layer to expose the first inner metal portion for forming a first electrode of the first electrical conductor.

[0014] In one embodiment, a lower surface of the second end portion is not covered by the first insulating layer to expose the second inner metal portion for forming the second electrode of the first electrical conductor.

[0015] In one embodiment, a lower surface of the third end portion is not covered by the second insulating layer to expose a third inner metal portion for forming a third electrode of the second electrical conductor.

[0016] In one embodiment, a lower surface of the fourth end portion is not covered by the second insulating layer to expose a fourth inner metal portion for forming a fourth electrode of the second electrical conductor.

[0017] In one embodiment, the width of the first electrical conductor is equal to the width of the second electrical conductor.

[0018] In one embodiment, a radius of curvature of an inner surface of the first curved portion of the first electrical conductor is greater than or equal to a radius of curvature of an outer surface of the first curved portion of the second electrical conductor.

[0019] In one embodiment, a radius of curvature of an inner surface of the second curved portion of the first electrical conductor is greater than or equal to a radius of curvature of an outer surface of the second curved portion of the second electrical conductor.

[0020] The present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body, comprising a first side portion, a first upper portion and a second side portion, wherein the first conductive body extends from the first side portion to the second side portion via the first upper portion, wherein the first conductive body further comprises a first end portion, wherein the first end portion is bent from the first side portion and extends in a direction away from the second side portion; and a second conductive body, comprising a third side portion, a second upper portion and a fourth side portion, wherein the second conductive body extends from the third side portion to the fourth side portion via the second upper portion, wherein the second conductive body further comprises a second end portion, wherein the second end portion is bent from the third side portion and extends in a direction toward the fourth side portion; wherein a material fills a space between the first end portion and the second end portion.

[0021] In one embodiment, the material is a magnetic material.

[0022] The present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body, comprising a first side portion, a first upper portion and a second side portion, wherein the first conductive body extends from the first side portion to the second side portion via the first upper portion, wherein the first conductive body is completely covered by a first insulating layer; and a second conductive body, comprising a third side portion, a second upper portion and a fourth side portion, wherein the second conductive body extends from the third side portion to the fourth side portion via the second upper portion, wherein the second conductive body is completely covered by a second insulating layer; wherein the first insulating layer is attached to the second insulating layer by an adhesive material.

[0023] The present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body, comprising a first end portion, wherein the first conductive body is covered by a first insulating layer, wherein a lower surface of the first end portion is not covered by the first insulating layer to expose an internal metal portion; and a molding body, covering the first conductive body, wherein an electrode structure is configured on the internal metal portion and electrically connected to the first conductive body, wherein a first upper portion of the electrode structure is disposed on a first side of the internal metal portion, wherein the first upper portion of the electrode structure is attached to the molding body via a first silver glue layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above aspects of the present invention and the attendant advantages will be more fully understood by referring to the following detailed description and the accompanying drawings, in which:

[0025] Figure 1 A schematic diagram illustrating a coupled inductor in one embodiment of the present invention;

[0026] Figure 2 A schematic diagram illustrating a coupled inductor in one embodiment of the present invention;

[0027] Figure 3 A schematic diagram illustrating a coupled inductor in one embodiment of the present invention;

[0028] Figure 4 A schematic diagram illustrating a coupled inductor in one embodiment of the present invention;

[0029] Figure 5 A schematic diagram illustrating an electrode structure of a coupled inductor in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram illustrating an electrode structure of a coupled inductor in an embodiment of the present invention;

[0031] Figure 7 A schematic diagram illustrating an electrode structure of a coupled inductor in an embodiment of the present invention;

[0032] Figure 8 A schematic diagram illustrating an electrode structure of a coupled inductor in an embodiment of the present invention;

[0033] Fig. 9 A schematic diagram of a side surface of an end portion of a second conductive body of a coupled inductor according to an embodiment of the present invention is illustrated;

[0034] Fig.10 A schematic diagram of a side surface of an end portion of a second conductive body of a coupled inductor according to an embodiment of the present invention is illustrated;

[0035] Fig.11 A schematic diagram illustrating a material filled in a space between an end portion of a first electrical conductor of a coupled inductor and an end portion of a second electrical conductor of a coupled inductor in one embodiment of the present invention;

[0036] Fig.12 A schematic diagram illustrating a material filled in a space between an end portion of a first electrical conductor of a coupled inductor and an end portion of a second electrical conductor of a coupled inductor in one embodiment of the present invention;

[0037] Fig.13 A schematic diagram illustrating a control element for controlling the leakage inductance of a coupled inductor in one embodiment of the present invention;

[0038] Fig.14 A schematic diagram illustrating a coupled inductor in one embodiment of the present invention;

[0039] Fig.15 A schematic diagram illustrating a coupled inductor in one embodiment of the present invention;

[0040] Fig.16A It is explained that in one embodiment of the present invention, the magnetic core and the package body of the coupled inductor are made of the same material;

[0041] Fig. 16B It is explained that in one embodiment of the present invention, the magnetic core and the package body of the coupled inductor are made of different materials; and

[0042] FIG. 17A to FIG. 17C In one embodiment of the present invention, multiple coupled inductor devices are provided in a single package.

[0043] Figure 18A-18B , describes a method of forming a coupled inductor in one embodiment of the present invention.

[0044] Explanation of reference numerals: 027-insulating layer; 028-first silver paste layer; 029-insulating layer; 100-material; 101-edge; 102-package body; 120-control element; 121-thickness; 122-leakage inductance control element width; 123-non-overlapping area; 130-first conductor; 130a-first side portion; 130b-first upper portion; 130c-second side portion; 130d-first end portion; 130e-second end portion; 130k-first insulating layer; 130M1-first electrode; 130M2-second electrode; 130TA-cross-sectional area; 133-bottom portion; 141-second bending portion; 146-first conductor line width; 160-second Two conductors; 160a-third side portion; 160b-second upper portion; 160c-fourth side portion; 160d-third end portion; 160e-fourth end portion; 160E1-electrode structure; 160E1T1-first upper portion; 160E1T2-second upper portion; 160k-second insulating layer; 160M1-third electrode / inner metal portion; 160M2-fourth electrode; 160TA-cross-sectional area; 163-bottom portion; 173-second bending portion; 174A-first end side portion; 175A-second end side portion; 176-second conductor line width; 190-magnetic core; HP-horizontal plane; L1-length; L2-length; T-filling depth. DETAILED DESCRIPTION

[0045] As in Figure 1 and Figure 2As shown in the figure, the present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body 130, comprising a first side portion 130a, a first upper portion 130b and a second side portion 130c, wherein the first conductive body 130 extends from the first side portion 130a to the second side portion 130c via the first upper portion 130b, wherein the first conductive body 130 further comprises a first end portion 130d and a second end portion 130e, wherein the first end portion 130d is bent from the first side portion 103a and moves away from the first end portion 130e. a second conductor 160, comprising a third side portion 160a, a second upper portion 160b and a fourth side portion 160c, wherein the second conductor 160 extends from the third side portion 160a to the fourth side portion 160c via the second upper portion 160b, wherein the second conductor 160 further comprises a third end portion 160d and a fourth end portion 160e, wherein the third end portion 160d is bent from the third side portion 160a and extends in a direction toward the fourth side portion 160c, and the fourth end portion 160e is bent from the fourth side portion 160c and extends in a direction toward the third side portion 160a; and a molding body. The first conductor 130 further includes a body 102 covering the first side portion 130a, the first upper portion 130b and the second side portion 130c of the first conductor 130.

[0046] In one embodiment, as in Figure 1 As shown in FIG. 1 , on a horizontal plane HP passing through the first side portion 130a and the third side portion 160a, a cross-sectional area 130TA of the first side portion 130a is greater than a cross-sectional area 160TA of the third side portion 160a.

[0047] In one embodiment, as in Figure 1 As shown in , the width of the first conductive body 130 is equal to the width of the second conductive body 160 .

[0048] In one embodiment, as in Figure 2 As shown in FIG. 1 , a magnetic core 190 is disposed in a hollow space of the second conductive body 160 .

[0049] In one embodiment, the package body 102 covers the first conductive body 130 , the second conductive body 160 and the magnetic core 190 .

[0050] In one embodiment, a material fills the space between the first end portion 130d and the third end portion 160d.

[0051] In one embodiment, the material is a magnetic material.

[0052] In one embodiment, the material is a polymer, an oxide or a ceramic material.

[0053] In one embodiment, the first conductor 130 is completely covered by the first insulating layer 130 k and the second conductor 160 is completely covered by the second insulating layer 160 k , wherein the first insulating layer 130 k is attached to the second insulating layer 160 k by an adhesive material.

[0054] In one embodiment, as in Figure 3 As shown in FIG. 1 , the lower surface of the first end portion 130 d is not covered by the first insulating layer 130 k to expose the first inner metal portion for forming the first electrode 130M1 of the first conductive body 130 .

[0055] In one embodiment, as in Figure 3 As shown in FIG. 1 , the lower surface of the second end portion 130 e is not covered by the first insulating layer 130 k to expose the second inner metal portion for forming the second electrode 130M2 of the first conductor 130 .

[0056] In one embodiment, as in Figure 3 As shown in FIG. 1 , the lower surface of the third end portion 160 d is not covered by the second insulating layer 160 k to expose the third inner metal portion for forming the third electrode 160M1 of the second conductor 160 .

[0057] In one embodiment, as in Figure 3 As shown in FIG. 1 , the lower surface of the fourth end portion 160 e is not covered by the second insulating layer 160 k to expose the fourth inner metal portion for forming the fourth electrode 160M2 of the second conductor 160 .

[0058] In one embodiment, the radius of curvature of the inner surface of the first curved portion of the first conductive body 130 is greater than or equal to the radius of curvature of the outer surface of the first curved portion of the second conductive body 160 .

[0059] In one embodiment, the radius of curvature of the inner surface of the second curved portion of the first conductive body 130 is greater than or equal to the radius of curvature of the outer surface of the second curved portion of the second conductive body 160 .

[0060] In one embodiment, as in Figure 4 As shown in FIG. 1 , the length L1 of the end portions 160 d , 160 e of the second electrical conductor 160 is greater than or equal to the length L2 of the corresponding end portions 130 d , 130 e of the first electrical conductor 130 .

[0061] As in Figure 2 As shown in the figure, the present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body 130, comprising a first side portion 130a, a first upper portion 130b and a second side portion 130c, wherein the first conductive body 130 extends from the first side portion 130a to the second side portion 130c via the first upper portion 130b, wherein the first conductive body 130 further comprises a first end portion 130d and a second end portion 130e, wherein the first end portion 130d is bent from the first side portion 103a and moves away from the first end portion 130e. The second conductor 160 includes a third side portion 160a, a second upper portion 160b and a fourth side portion 160c, wherein the second conductor 160 extends from the third side portion 160a to the fourth side portion 160c via the second upper portion 160b, wherein the second conductor 160 further includes a third end portion 160d and a third end portion 160d. Four end portions 160e, wherein the third end portion 160d is bent from the third side portion 160a and extends in a direction toward the fourth side portion 160c, and the fourth end portion 160e is bent from the fourth side portion 160c and extends in a direction toward the third side portion 160a; the first conductor 130 is completely covered by a first insulating layer 130k and the second conductor 160 is completely covered by a second insulating layer 160k, wherein the first insulating layer 130k is attached to the second insulating layer 160k by an adhesive material.

[0062] As in Figure 5As shown in the figure, the present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body 130, comprising a first side portion 130a, a first upper portion 130b and a second side portion 130c, wherein the first conductive body 130 extends from the first side portion 130a to the second side portion 130c via the first upper portion 130b, wherein the first conductive body 130 further comprises a first end portion 130d and a second end portion 130e, wherein the first end portion 130d is bent from the first side portion 103a and moves away from the first end portion 130e. The second conductor 160 includes a third side portion 160a, a second upper portion 160b, and a fourth side portion 160c, wherein the second conductor 160 extends from the third side portion 160a to the fourth side portion 160c via the second upper portion 160b, wherein the second conductor 160 further includes a third end portion 160d and a fourth end portion 160e, wherein the third end portion 160d extends from the third side portion 160a to the fourth side portion 160c. The fourth end portion 160e is bent from the fourth side portion 160c and extends in a direction toward the third side portion 160a; wherein the electrode structure 160E1 is configured on the internal metal portion 160M1 and is electrically connected to the second conductor 160, wherein the first upper portion 160E1T1 of the electrode structure 160E1 is disposed on the first side (side) of the internal metal portion 160M1, wherein the first upper portion 160E1T1 of the electrode structure 160E1 is attached to the package body 102 through a first silver glue layer 028.

[0063] In one embodiment, the electrode structure 160E1 includes three metal layers of copper, nickel, and tin, the bottom metal layer is copper and the top metal layer is tin.

[0064] In one embodiment, the three metal layers of copper, nickel, and tin are formed by electroplating.

[0065] In one embodiment, the first upper portion 160E1T1 of the electrode structure 160E1 is attached to the second insulating layer 160 k of the second conductor 160 through the first silver paste layer 028 .

[0066] In one embodiment, an insulating layer 027 is disposed between the first silver paste layer 028 and the second insulating layer 160 k of the second conductor 160 .

[0067] In one embodiment, the first upper portion 160E1T1 of the electrode structure 160E1 is attached to the second insulating layer 160k of the second conductor 160 through the first silver paste layer 028, wherein another insulating layer 029 is disposed below the insulating layer 027 (see Figure 6 ).

[0068] In one embodiment, the second upper portion 160E1T2 of the electrode structure 160E1 is disposed on a second side of the internal metal portion 160M1, wherein the second upper portion 160E1T2 of the electrode structure 160E1 is attached to the package body 102 via a second silver glue layer 028, wherein the first upper portion 160E1T1 and the second upper portion 160E1T2 are on two opposite sides of the internal metal portion 160M1.

[0069] In one embodiment, the first electrode and the second electrode are respectively at the bottom of the package body 102 and extend to the third side surface and the fourth side surface of the package body 102 , and the first electrode extends to the first side surface and the second side surface of the package body 102 .

[0070] In one embodiment, as in Figure 7 As shown in , the first electrode is a fully extended electrode on the lower surface of the package body 102.

[0071] In one embodiment, as in Figure 8 As shown in , the first electrode is an island-shaped electrode on the lower surface of the package body 102 and does not extend to any side surface of the package body 102 .

[0072] In one embodiment, as in Fig. 9 and Fig.10 As shown in FIG. 1 , the insulating material is coated on the first end side portion 174A in the second conductor 160 and the second end side portion 175A in the second conductor 160. The insulating material may be a polymer material, an oxide, a ceramic material or a magnetic material.

[0073] As in Fig.11As shown in the figure, the present invention provides a coupled inductor, wherein the coupled inductor comprises: a first conductive body 130, comprising a first side portion 130a, a first upper portion 130b and a second side portion 130c, wherein the first conductive body 130 extends from the first side portion 130a to the second side portion 130c via the first upper portion 130b, wherein the first conductive body 130 further comprises a first end portion 130d and a second end portion 130e, wherein the first end portion 130d is bent from the first side portion 103a and moves away from the first end portion 130e. The second end portion 130e is bent from the second side portion 130c and extends in a direction away from the first side portion 130a; and a second conductor 160, comprising a third side portion 160a, a second upper portion 160b and a fourth side portion 160c, wherein the second conductor 160 extends from the third side portion 160a to the fourth side portion 160c via the second upper portion 160b, wherein the second conductor 160 0 further includes a third end portion 160d and a fourth end portion 160e, wherein the third end portion 160d is bent from the third side portion 160a and extends in a direction toward the fourth side portion 160c, and the fourth end portion 160e is bent from the fourth side portion 160c and extends in a direction toward the third side portion 160a; wherein a material 100 is filled in a space between the first end portion 130d and the third end portion 160d.

[0074] In one embodiment, the leakage inductance or coupling coefficient can be adjusted or controlled by the size of the triangular area formed by the R angle of the second bent portion 141 inside the first conductor 130 , the R angle of the second bent portion 173 outside the second conductor 160 , and the bottom surface of the package body 102 .

[0075] In one embodiment, as in Fig.12 As shown in , the filling depth T is ≤ the length of the bottom portion 133 of the first conductive body 130 and the length of the bottom portion 163 of the second conductive body 160 .

[0076] In one embodiment, the material is a magnetic material.

[0077] In one embodiment, the material is a polymer, an oxide or a ceramic material.

[0078] In one embodiment, the material evenly covers and fills a triangular area formed by the second inner curved portion 141 of the first electrical conductor 130 and the second outer curved portion 173 of the second electrical conductor 160 .

[0079] As in Fig.13 and Fig.14 As shown in the figure, the control element 120 for controlling the leakage inductance is placed in the package body 102 as shown in the figure, wherein the leakage inductance control element 120 is between the first conductor 130 and the second conductor 160, and the leakage inductance control element width 122 is less than the first conductor line width 146 and the second conductor line width 176. The leakage inductance or coupling coefficient between the first conductor 130 and the second conductor 160 can be adjusted by the thickness 121 and material of the leakage inductance control element 120. The material of the leakage inductance control element 120 can be a polymer material, an oxide, a ceramic material or an insulating material.

[0080] As in Fig.15 As shown in FIG. 1 , the leakage inductance or coupling coefficient can be finely adjusted by the size of the non-overlapping area 123 of the first conductor 130 and the second conductor 160 , and the first conductor line width 146> the second conductor line width 176. The side 101 of the filling material 100 has the same width as the second conductor line width 176.

[0081] As in Fig.16A As shown in the figure, the magnetic core 190 and the package body 102 are made of the same material, wherein the material can be amorphous powder, nanocrystalline powder, carbonyl iron powder, alloy powder, Hi-Flux, Sendust, MPP or Ferrite. The composition can be carbon, silicon, chromium, iron, boron, cobalt, niobium (Nb) or nickel. It is formed by pressure molding at room temperature.

[0082] As in Fig. 16BAs shown in , the magnetic core 190 and the package body 102 are made of different materials. There is an all-around insulating adhesive layer for the assembly and attachment of the first conductor 130 and the second conductor 160. The material of the magnetic core 190 can be amorphous powder, nanocrystalline powder, carbonyl iron powder, alloy powder, iron-nickel alloy (Hi-Flux), sendust, iron-nickel-molybdenum alloy (MPP) or ferrite. The composition can be carbon, silicon, chromium, iron, boron, cobalt, niobium (Nb) or nickel. It is usually formed by compression molding at normal temperature and then sintered at high temperature. The material of the package body 102 may be amorphous powder, nanocrystalline powder, carbonyl iron powder, alloy powder, Hi-Flux, Sendust, MPP or Ferrite. The composition may be carbon, silicon, chromium, iron, boron, cobalt, niobium (Nb) or nickel. The package body 102 is formed by pressure molding at room temperature.

[0083] As in FIG. 17A to FIG. 17C As shown in , a plurality of coupled inductors may be placed in the package body 102 .

[0084] In one embodiment, Figures 1 to 4 Reference Figure 18A-18B , the method of forming a coupled inductor is described as follows: step 1. forming the first conductor, step 2. forming an insulating layer all around the outside of the first conductor, step 3. cutting and bending the second conductor, step 4. assembling and bending the first conductor and the second conductor after bonding, step 5. forming the first positioning core, step 6. forming the second positioning core, step 7. placing the assembled coil into the first positioning core, step 8. assembling with the second positioning core and placing it into the mold cavity, step 9. hot pressing, step 10. baking and curing or high temperature sintering, step 11. applying insulating glue (layer) all around the product, step 12. laser defining the electrode area, step 13. electroplating the electrode.

[0085] Although the present invention is provided as above with the above preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Although the above description does not fully disclose these possible changes and substitutions, the scope of the claims attached to this specification substantially covers all these aspects.

Claims

1. A coupled inductor, characterized in that: Include: A first conductor, comprising a first side portion, a first upper portion and a second side portion, wherein the first conductor extends from the first side portion to the second side portion via the first upper portion, wherein the first conductor further comprises a first end portion and a second end portion, wherein the first end portion is bent from the first side portion and extends in a direction away from the second side portion, and the second end portion is bent from the second side portion and extends in a direction away from the first side portion; a second electrical conductor comprising a third side portion, a second upper portion and a fourth side portion, wherein the second electrical conductor extends from the third side portion to the fourth side portion via the second upper portion, wherein the second electrical conductor further comprises a third end portion and a fourth end portion, wherein the third end portion is bent from the third side portion and extends in a direction toward the fourth side portion, and the fourth end portion is bent from the fourth side portion and extends in a direction toward the third side portion; as well as A packaging body covers the first side portion, the first upper portion and the second side portion of the first conductor.

2. The coupled inductor according to claim 1, wherein: A magnetic core is disposed in a hollow space of the second conductor.

3. The coupled inductor according to claim 1, wherein: The packaging body covers the first conductor, the second conductor and the magnetic core.

4. The coupled inductor according to claim 1, wherein: A material fills a space between the first end portion and the third end portion.

5. The coupled inductor according to claim 4, characterized in that: The material is a magnetic material.

6. The coupled inductor according to claim 4, characterized in that: The material is a polymer, an oxide, a ceramic material or a magnetic material.

7. The coupled inductor according to claim 1, wherein: The first conductor is completely covered by a first insulating layer and the second conductor is completely covered by a second insulating layer, wherein the first insulating layer is attached to the second insulating layer by an adhesive material.

8. The coupled inductor according to claim 7, characterized in that: A lower surface of the first end portion is not covered by the first insulating layer to expose a first inner metal portion for forming a first electrode of the first conductor.

9. The coupled inductor according to claim 8, characterized in that: A lower surface of the second end portion is not covered by the first insulating layer to expose a second inner metal portion for forming a second electrode of the first conductor.

10. The coupled inductor according to claim 9, characterized in that: A lower surface of the third end portion is not covered by the second insulating layer to expose a third inner metal portion for forming a third electrode of the second conductor.

11. The coupled inductor according to claim 10, characterized in that: A lower surface of the fourth end portion is not covered by the second insulating layer to expose a fourth inner metal portion for forming a fourth electrode of the second conductor.

12. The coupled inductor according to claim 1, wherein: On a horizontal plane passing through the first side portion and the third side portion, a cross-sectional area of ​​the first side portion is greater than a cross-sectional area of ​​the third side portion.

13. The coupled inductor according to claim 1, wherein: A width of the first conductive body is equal to a width of the second conductive body.

14. The coupled inductor according to claim 1, wherein: A curvature radius of an inner surface of a first curved portion of the first conductor is greater than or equal to a curvature radius of an outer surface of a first curved portion of the second conductor.

15. The coupled inductor according to claim 14, characterized in that: A curvature radius of an inner surface of a second curved portion of the first conductor is greater than or equal to a curvature radius of an outer surface of a second curved portion of the second conductor.

16. The coupled inductor according to claim 1, wherein: A length of the third end portion of the second conductor is greater than or equal to a length of the first end portion of the first conductor.

17. A coupled inductor, characterized in that: Include: a first conductor, comprising a first side portion, a first upper portion, and a second side portion, wherein the first conductor extends from the first side portion to the second side portion via the first upper portion, wherein the first conductor further comprises a first end portion, wherein the first end portion is bent from the first side portion and extends in a direction away from the second side portion; and a second conductor, comprising a third side portion, a second upper portion and a fourth side portion, wherein the second conductor extends from the third side portion to the fourth side portion via the second upper portion, wherein the second conductor further comprises a second end portion, wherein the second end portion is bent from the third side portion and extends in a direction toward the fourth side portion; A material is filled in a space between the first end portion and the second end portion.

18. A coupled inductor, characterized in that: Include: a first conductor comprising a first side portion, a first upper portion and a second side portion, wherein the first conductor extends from the first side portion to the second side portion via the first upper portion, wherein the first conductor is completely covered by a first insulating layer; and a second conductor, comprising a third side portion, a second upper portion and a fourth side portion, wherein the second conductor extends from the third side portion to the fourth side portion via the second upper portion, wherein the second conductor is completely covered by a second insulating layer; The first insulating layer is attached to the second insulating layer through an adhesive material.

19. A coupled inductor, characterized in that: Include: a first conductor comprising a first end portion, wherein the first conductor is covered by a first insulating layer, wherein a lower surface of the first end portion is not covered by the first insulating layer to expose an inner metal portion; and A packaging body covers the first conductor, wherein an electrode structure is configured on the internal metal part and electrically connected to the first conductor, wherein a first upper portion of the electrode structure is disposed on a first side of the internal metal part, wherein the first upper portion of the electrode structure is attached to the packaging body through a first silver glue layer.

20. The coupled inductor according to claim 19, wherein: A second upper portion of the electrode structure is disposed on a second side edge of the internal metal portion, wherein the second upper portion of the electrode structure is attached to the packaging body via a second silver glue layer, wherein the first upper portion and the second upper portion are on two opposite sides of the internal metal portion.

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