Composite component and mounting structure

Abstract

To reduce variations in a distance between a CMCC mounted on a differential signal line and a capacitor.SOLUTION: A composite component includes: a winding core portion around which a pair of windings is wound; a first flange part provided at a first end that is one end in a first direction, the first direction being a direction in which the winding core portion extends; and a second flange portion provided at the other end in the first direction. The first flange portion has a first bottom surface, a first side surface that stands up from the first bottom surface, and a first top surface. The second flange portion includes: a common mode chalk coil having a second bottom surface, a second side surface that stands up from the second bottom surface, and a second top surface; a first extension portion disposed in a second direction orthogonal to the first direction, from the first flange portion; a second extension portion disposed in the second direction, from the second flange portion; a first electrode provided on the first bottom surface of the first extension portion; and a second electrode provided on the second bottom surface of the second extension portion. A capacity is formed between the first electrode and the second electrode.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a composite component and a mounting structure. [Background technology]

[0002] In some cases, a common mode choke coil (hereinafter referred to as CMCC) is mounted on a differential signal line to provide electromagnetic compatibility (EMC) measures. In other cases, a capacitor is mounted near the CMCC to provide noise countermeasures. For example, in Patent Document 1, a capacitor is mounted in parallel with the differential signal line to form a filter circuit to provide noise countermeasures. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-028999 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the distance between the CMCC and the capacitor may not be constant, and the distance between them may vary. When the distance varies, the characteristic impedance of the differential signal line varies, resulting in the generation of noise.

[0005] The present disclosure has been made in consideration of the above, and its purpose is to provide a composite component and mounting structure that can reduce variation in the distance between a CMCC and a capacitor mounted on a differential signal line. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, a composite component according to an embodiment of the present disclosure includes a common mode choke coil comprising a winding core portion around which a pair of windings are wound, a first flange portion provided at a first end portion which is one end portion in a first direction which is a direction in which the winding core portion extends, and a second flange portion provided at the other end portion in the first direction, wherein the first flange portion has a first bottom surface and a first side surface and a first top surface standing up from the first bottom surface, and the second flange portion has a second bottom surface and a second side surface and a second top surface standing up from the second bottom surface, a first extension portion arranged in a second direction perpendicular to the first direction from the first flange portion, a second extension portion arranged in the second direction from the second flange portion, a first electrode provided on the first bottom surface of the first extension portion, and a second electrode provided on the second bottom surface of the second extension portion, and a capacitance is formed between the first electrode and the second electrode.

[0007] In order to solve the above-mentioned problems and achieve the objective, a mounting structure according to an embodiment of the present disclosure includes the above-mentioned composite component, a pair of differential transmission lines, an insulating section extending in a direction intersecting the extension direction of the differential transmission lines, and a first ground section and a second ground section respectively provided on either side of the insulating section, with the insulating section sandwiched between the common mode choke coil of the composite component, wherein the common mode choke coil is inserted at the intersection between the differential transmission lines and the insulating section, the first electrode of the common mode choke coil is connected to the first ground section, and the second electrode of the common mode choke coil is connected to the second ground section. Effect of the Invention

[0008] According to the present invention, it is possible to reduce variation in the distance between a CMCC and a capacitor mounted on a differential signal line. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a configuration of a composite part according to a first embodiment of the present disclosure. [Diagram 2] FIG. 2 is a plan view of the composite part according to the first embodiment. [Diagram 3] FIG. 3 is a diagram illustrating an example of the configuration of the CMCC illustrated in FIG. [Figure 4] FIG. 4 is a diagram showing an example of use of a composite part. [Diagram 5] FIG. 5 is a diagram illustrating a composite part according to a second embodiment of the present disclosure. [Figure 6] FIG. 6 illustrates a composite part according to a third embodiment of the present disclosure. [Figure 7] FIG. 7 is a diagram for explaining a comparison of capacitance values ​​obtained by the composite parts according to the respective embodiments. [Figure 8] FIG. 8 is a diagram showing a composite component excluding the CMCC and mounted on a board. [Figure 9] FIG. 9 is a diagram showing a simulation result for the mounting state shown in FIG. [Figure 10] FIG. 10 is a diagram for explaining the conditions of the actual measurement. [Figure 11] FIG. 11 is a diagram showing the noise suppression effect achieved by connecting a capacitor to a CMCC. [Figure 12] FIG. 12 is a diagram for explaining compliance with EMC standards. [Figure 13] FIG. 13 is a diagram showing a state in which the composite part according to the fourth embodiment of the present disclosure is mounted on a board. [Figure 14] FIG. 14 is a diagram showing a state in which a composite component according to the fifth embodiment of the present disclosure is mounted on a board. [Figure 15] FIG. 15 is a diagram illustrating a composite part according to a sixth embodiment of the present disclosure. [Figure 16] FIG. 16 is a diagram illustrating a composite part according to a seventh embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. In the following description of each embodiment, the same or equivalent components as those in other embodiments are given the same reference numerals, and their description will be simplified or omitted. The present invention is not limited to each embodiment. In addition, the components of each embodiment include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same. The configurations described below can be appropriately combined. In addition, the configurations can be omitted, replaced, or modified within the scope of the gist of the invention.

[0011] (First embodiment) (composition) Fig. 1 is a diagram showing a configuration of a composite part according to a first embodiment of the present disclosure. Fig. 1 is a perspective view of a composite part 100 according to the first embodiment. Fig. 2 is a plan view of the composite part 100 according to the first embodiment. Fig. 2 is a plan view seen from the direction of an arrow Z11 in Fig. 1.

[0012] 1 and 2, composite component 100 includes CMCC 10 and extension portions 21A, 21B, 22A, and 22B. CMCC 10 includes a winding core portion 11 extending in the direction of arrow X1. In FIGS. 1 and 2, the direction in which winding core portion 11 extends is defined as the X-axis direction. In FIG. 2, the direction perpendicular to the X-axis direction is defined as the Y-axis direction. The Y-axis direction is a direction intersecting the X-axis direction. The direction perpendicular to the X-axis direction and the Y-axis direction is defined as the Z-axis direction.

[0013] The extension portion 21A is connected to the CMCC 10. The extension portion 21A has a shape that extends the flange portion 12A of the CMCC 10. The extension portion 21A extends the flange portion 12A from one end of the winding core portion 11 in one direction in the Y axis direction (the downward direction in FIG. 2). That is, the extension portion 21A is disposed from the flange portion 12A in the Y axis direction perpendicular to the X axis direction. The extension portion 21A may be molded integrally with the flange portion 12A, or may be molded separately and then bonded together to form an integral portion. By integrating the two, the number of parts can be reduced compared to when they are provided separately.

[0014] The extension portion 21B is connected to the CMCC 10. The extension portion 21B has a shape that extends the flange portion 12B of the CMCC 10. The extension portion 21B extends the flange portion 12B from the other end of the winding core portion 11 in the X-axis direction in one direction in the Y-axis direction (downward in FIG. 2). That is, the extension portion 21B is disposed in the Y-axis direction perpendicular to the X-axis direction from the flange portion 12B. The extension portion 21B may be molded integrally with the flange portion 12B, or may be molded separately and then bonded together to form an integral body. By integrating the two, the number of parts can be reduced compared to when the two are provided separately. In this example, the shapes of the extension portion 21A and the extension portion 21B are rectangular parallelepipeds. A space 71 is provided between the extension portion 21A and the extension portion 21B.

[0015] The extension portion 22A is connected to the CMCC 10. The extension portion 21A has a shape that extends the flange portion 12A of the CMCC 10. The extension portion 22A extends the flange portion 12A from one end in the X-axis direction of the winding core portion 11 to the other direction in the Y-axis direction (upward in FIG. 2). That is, the extension portion 22A is disposed from the flange portion 12A in the Y-axis direction perpendicular to the X-axis direction. The extension portion 22A may be molded integrally with the flange portion 12A, or may be molded separately and then bonded together to form an integral portion. By integrating the two, the number of parts can be reduced compared to when they are provided separately.

[0016] The extension portion 22B is connected to the CMCC 10. The extension portion 22B has a shape that extends the flange portion 12B of the CMCC 10. The extension portion 22B extends the flange portion 12B from the other end of the winding core portion 11 in the X-axis direction to the other direction in the Y-axis direction (upward in FIG. 2). That is, the extension portion 22B is disposed in the Y-axis direction perpendicular to the X-axis direction from the flange portion 12B. The extension portion 22B may be molded integrally with the flange portion 12B, or may be molded separately and then bonded together. By integrating the two, the number of parts can be reduced compared to when they are provided separately. In this example, the shapes of the extension portion 22A and the extension portion 22B are rectangular parallelepipeds. A space 72 is present between the extension portion 22A and the extension portion 22B.

[0017] The composite part 100 also includes electrodes 31A, 31B, 32A, and 32B. The electrode 31A is provided on the surface of the extension portion 21A. The electrode 31A has a bottom surface portion 31A1, a side surface portion 31A2, and a top surface portion 31A3. The bottom surface portion 31A1 is provided on the bottom surface of the extension portion 21A. The side surface portion 31A2 stands upright from the bottom surface portion 31A1. The side surface portion 31A2 is provided on a side surface of the extension portion 21A. The top surface portion 31A3 is provided on the top surface of the extension portion 21A. The top surface portion 31A3 is the surface opposite to the bottom surface portion 31A1.

[0018] The electrode 31B is provided on the surface of the extension portion 21B. The electrode 31B has a bottom surface portion 31B1, a side surface portion 31B2, and a top surface portion 31B3. The bottom surface portion 31B1 is provided on the bottom surface of the extension portion 21B. The side surface portion 31B2 stands up from the bottom surface portion 31B1. The side surface portion 31B2 is provided on a side surface of the extension portion 21B. The top surface portion 31B3 is provided on the top surface of the extension portion 21B. The top surface portion 31B3 is the surface opposite to the bottom surface portion 31B1.

[0019] The electrode 32A is provided on the surface of the extension portion 22A. The electrode 32A has a bottom surface portion 32A1, a side surface portion 32A2, and a top surface portion 32A3. The bottom surface portion 32A1 is provided on the bottom surface of the extension portion 22A. The side surface portion 32A2 stands up from the bottom surface portion 32A1. The side surface portion 32A2 is provided on a side surface of the extension portion 22A. The top surface portion 32A3 is provided on the top surface of the extension portion 22A. The top surface portion 32A3 is the surface opposite to the bottom surface portion 32A1.

[0020] The electrode 32B is provided on the surface of the extension portion 22B. The electrode 32B has a bottom surface portion 32B1, a side surface portion 32B2, and a top surface portion 32B3. The bottom surface portion 32B1 is provided on the bottom surface of the extension portion 22B. The side surface portion 32B2 stands up from the bottom surface portion 32B1. The side surface portion 32B2 is provided on a side surface of the extension portion 22B. The top surface portion 32B3 is provided on the top surface of the extension portion 22B. The top surface portion 32B3 is the surface opposite to the bottom surface portion 32B1.

[0021] The composite part 100 having the above structure includes a CMCC 10, extension portions 21A, 21B, 22A, and 22B, and electrodes 31A, 31B, 32A, and 32B. The CMCC 10 is sandwiched between extension portion 21A and extension portion 21B. The CMCC 10 is also sandwiched between extension portion 21B and extension portion 22B. For this reason, extension portions 21A, 21B, 22A, and 22B are shaped to extend flange portions 12A and 12B of the CMCC 10 in a second direction (Y direction) that intersects with the first direction (X direction). CMCC 10 has a winding core 11 around which a pair of windings 14A and 14B are wound, a flange portion 12A which is a first flange portion provided at a first end which is one end in a first direction (X direction) which is a direction in which winding core 11 extends, and a flange portion 12B which is a second flange portion provided at the other end in the first direction (X direction). Each of extension portions 21A, 21B, 22A, 22B is made of, for example, ferrite.

[0022] When focusing on the extension portion 21A and the extension portion 21B, the extension portion 21A corresponds to the first extension portion of the present disclosure, and the extension portion 21B corresponds to the second extension portion of the present disclosure. The electrode 31A of the extension portion 21A corresponds to the first electrode of the present disclosure, and the electrode 31B of the extension portion 21B corresponds to the second electrode of the present disclosure. A stray capacitance component, i.e., a capacitance, is formed between the electrode 31A and the electrode 31B.

[0023] When focusing on the extension portion 22A and the extension portion 22B, the extension portion 22A corresponds to the first extension portion of the present disclosure, and the extension portion 22B corresponds to the second extension portion of the present disclosure. The electrode 32A of the extension portion 22A corresponds to the first electrode of the present disclosure, and the electrode 32B of the extension portion 22B corresponds to the second electrode of the present disclosure. A stray capacitance component, i.e., a capacitance, is formed between the electrode 32A and the electrode 32B.

[0024] 2, length D1 is the length in the X-axis direction of the composite part 100. Length D1 is, for example, 5.0 mm.

[0025] The length D2 is the length in the Y-axis direction of the composite part 100. The length D2 is, for example, 17.65 mm.

[0026] Length D4 is the length of electrode 31A in the X-axis direction. Length D4 is, for example, 2.25 mm. The same applies to the lengths of electrodes 31B, 32A, and 32B in the X-axis direction.

[0027] Length D5 is the length of extension portion 21A in the Y-axis direction. Length D5 is, for example, 7.5 mm. The same applies to the lengths of extension portions 21B, 22A, and 22B in the Y-axis direction.

[0028] Length D6 is the length of electrode 31A in the Y-axis direction. Length D6 is, for example, 6.5 mm. The same applies to the lengths of electrodes 31B, 32A, and 32B in the Y-axis direction.

[0029] 1, length D3 is the length (i.e., height) of electrode 31A in the Z-axis direction. Length D3 is, for example, 3.2 mm. The same applies to the lengths (i.e., heights) of electrodes 31B, 32A, and 32B in the Z-axis direction.

[0030] (CMCC configuration example) Next, the configuration of the CMCC 10 will be described with reference to FIG. 3. FIG. 3 is a diagram showing an example of the configuration of the CMCC 10 shown in FIG. 1. The CMCC 10 includes a winding core portion 11, a flange portion 12A, a flange portion 12B, and a cover portion 50. These are made of a magnetic material. For example, they are made of ferrite. The winding core portion 11 acts as a magnetic core. The flange portion 12A is connected to one end of the winding core portion 11 in the X-axis direction. The flange portion 12B is connected to the other end of the winding core portion 11 in the X-axis direction.

[0031] The flange portion 12A has a terminal 14Aa and a terminal 14Ba. The flange portion 12B has a terminal 14Ab and a terminal 14Bb. Therefore, the CMCC 10 has four terminals, 14Aa, 14Ba, 14Ab, and 14Bb. The terminals 14Aa, 14Ba, 14Ab, and 14Bb are electrically connected to signal wiring on a board on which the composite component 100 is mounted.

[0032] The winding core 11 is prismatic and extends in the direction of the arrow X1. A flange 12A is connected to one end 11a of the winding core 11 in the direction of the arrow X1. A flange 12B is connected to the other end 11b of the winding core 11 in the direction of the arrow X1. The lid 50 is provided to reinforce the flanges 12A and 12B.

[0033] Windings 14A and 14B are wound around the winding core 11. Windings 14A and 14B are wound around the same winding core 11. Windings 14A and 14B are insulated from each other. The inductor formed by windings 14A and the inductor formed by windings 14B are magnetically coupled.

[0034] One end of the winding 14A is connected to a terminal 14Aa. The other end of the winding 14A is connected to a terminal 14Ab. One end of the winding 14B is connected to a terminal 14Ba. The other end of the winding 14B is connected to a terminal 14Bb. The length L of the CMCC 10 in the X-axis direction is, for example, 3.2 mm, the width W in the Y-axis direction is, for example, 2.5 mm, and the height H in the Z-axis direction is, for example, 2.35 mm. As described above, the capacitance is formed between the electrodes 31A and 31B because the electrodes 31A and 31B are arranged closely to each other. Similarly, the capacitance is formed between the electrodes 32A and 32B because the electrodes 32A and 32B are arranged closely to each other. Here, the close arrangement means that, for example, the distance between the two is 1 / 6 or less of the length L of the CMCC 10 in the longitudinal direction.

[0035] (Example of composite parts) Fig. 4 is a diagram showing an example of use of the composite component 100. Fig. 4 shows a mounting structure using the composite component 100. In Fig. 4, a substrate K has ground portions G11, G12, G21, and G22. The substrate K has an insulating portion D. Since the insulating portion D is provided, the ground portions G11, G12, G21, and G22 are insulated from each other. Wires 201, 202, 203, and 204 are formed on the surface of the substrate K.

[0036] The ground parts G11, G12, G21, and G22 are connected to a reference potential, which is, for example, a ground potential. The same applies to the following description.

[0037] Between the ground portion G11 and the ground portion G21, wirings 201 and 202 are provided. An electrode pad EAa is connected to the wiring 201. An electrode pad EBa is connected to the wiring 202.

[0038] Between the ground portion G12 and the ground portion G22, wirings 203 and 204 are provided. An electrode pad EAb is connected to the wiring 203. An electrode pad EBb is connected to the wiring 204.

[0039] An electrode pad E11 is provided on the end of the ground part G11 facing the insulating part D. An electrode pad E12 is provided on the end of the ground part G12 facing the insulating part D. The electrode pad E11 and the electrode pad E12 are provided at positions corresponding to each other with the insulating part D in between.

[0040] An electrode pad E21 is provided at the end of the ground portion G21 facing the insulating portion D. An electrode pad E22 is provided at the end of the ground portion G22 facing the insulating portion D. The electrode pad E21 and the electrode pad E22 are provided at positions corresponding to each other with the insulating portion D in between.

[0041] In FIG. 4, the composite component 100 is mounted on the substrate K as indicated by the arrow Y2. Specifically, the common mode choke coil CMCC of the composite component 100 is inserted into an intersection between the differential transmission lines (the wirings 201 and 203, the wirings 202 and 204) and the insulating portion D. Then, each electrode of the composite component 100 is connected to an electrode pad of the substrate K by soldering. That is, the bottom surface portion 31A1 (see FIG. 1) of the electrode 31A of the composite component 100 is connected to the electrode pad E11. Similarly, the bottom surface portion 31B1 (see FIG. 1) of the electrode 31B is connected to the electrode pad E12, the bottom surface portion 32A1 (see FIG. 1) of the electrode 32A is connected to the electrode pad E21, and the bottom surface portion 32B1 (see FIG. 1) of the electrode 32B is connected to the electrode pad E22. At this time, terminal 14Aa is connected to electrode pad EAa, terminal 14Ab is connected to electrode pad EAb, terminal 14Ba is connected to electrode pad EBa, and terminal 14Bb is connected to electrode pad EBb. In this connected state, winding 14A is inserted between wiring 201 and wiring 203, and winding 14B is inserted between wiring 202 and wiring 204. Wires 201 and 203, and wiring 202 and 204 are differential transmission lines. The differential transmission lines transmit differential signals.

[0042] (operation) Returning to FIG. 1, by providing composite component 100 as described above, winding 14A is inserted between wiring 201 and wiring 203, and winding 14B is inserted between wiring 202 and wiring 204. This allows composite component 100 to be provided midway through the wiring. Electrode 31A faces electrode 31B, generating a stray capacitance component. Also, electrode 32A faces electrode 32B, generating a stray capacitance component. This configuration reduces noise. Since the electrodes are formed on the surfaces of the extensions, the capacitors can be positioned by each of extensions 21A, 21B, 22A, and 22B, eliminating variation in the distance between CMCC 10 and each capacitor.

[0043] (effect) In the composite component 100, the extension parts 21A, 21B, 22A, and 22B are connected to the CMCC 10, and electrodes are provided on their bottom surfaces to form stray capacitance components, i.e., capacitance. In this way, the capacitors can be positioned by the extension parts 21A, 21B, 22A, and 22B, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance, and reducing noise. The capacitors can be provided in close proximity to the CMCC 10, making the return path loop smaller and reducing noise.

[0044] Second embodiment (composition) FIG. 5 is a diagram showing a composite part according to a second embodiment of the present disclosure. In FIG. 5, the composite part 100a according to the second embodiment is different from the composite part 100 according to the first embodiment in that an electrode 41A is provided on the bottom surface of the extension part 21A. No electrode is provided on the top surface and side surface of the extension part 21A. Similarly, an electrode 41B is provided on the bottom surface of the extension part 21B, and no electrode is provided on the top surface and side surface of the extension part 21B. An electrode 42A is provided on the bottom surface of the extension part 22A, and no electrode is provided on the top surface and side surface of the extension part 22A. An electrode 42B is provided on the bottom surface of the extension part 22B, and no electrode is provided on the top surface and side surface of the extension part 22B.

[0045] The extension portions 21A and 22A may be molded integrally with the flange portion of the CMCC 10, or may be molded separately and then bonded together. The extension portions 21B and 22B may be molded integrally with the flange portion of the CMCC 10, or may be molded separately and then bonded together.

[0046] 5, there is a space 71 between extension portion 21A and extension portion 21B in the X-axis direction. Electrodes 41A and 41B are provided on either side of space 71. Electrode 41A is provided protruding from the bottom surface of extension portion 21A in the direction away from space 71 in the X-axis direction. Electrode 41B is provided protruding from the bottom surface of extension portion 21B in the direction away from space 71 in the X-axis direction.

[0047] The electrodes 41A and 41B have portions which face each other across the space 71. By providing the electrodes on the bottom surfaces of the extensions 21A and 21B in this manner, the electrodes 41A and 41B face each other, forming a capacitance.

[0048] 5, there is a space 72 between extension portion 22A and extension portion 22B in the X-axis direction. Electrode 42A and electrode 42B are provided on either side of space 72. Electrode 42A is provided protruding from the bottom surface of extension portion 22A in the direction away from space 72 in the X-axis direction. Electrode 42B is provided protruding from the bottom surface of extension portion 22B in the direction away from space 72 in the X-axis direction.

[0049] Electrode 42A and electrode 42B have portions that face each other across space 71. By providing electrodes on the bottom surfaces of extensions 22A and 22B in this manner, electrode 42A and electrode 42B face each other, forming a capacitance.

[0050] (effect) In composite component 100a, extension parts 21A, 21B, 22A, and 22B are connected to CMCC 10, and electrodes are provided on their bottom surfaces to form stray capacitance components, i.e., capacitances. In this way, the capacitors can be positioned by extension parts 21A, 21B, 22A, and 22B, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance, and reducing noise.

[0051] Third embodiment (composition) FIG. 6 is a diagram showing a composite part according to a third embodiment of the present disclosure. In FIG. 6, the composite part 100b according to the third embodiment is different from the composite part 100 according to the first embodiment in that an electrode 51A is provided on the bottom surface and side surface of the extension part 21A. No electrode is provided on the top surface of the extension part 21A. Similarly, an electrode 51B is provided on the bottom surface and side surface of the extension part 21B, and no electrode is provided on the top surface of the extension part 21B. An electrode 52A is provided on the bottom surface and side surface of the extension part 22A, and no electrode is provided on the top surface of the extension part 22A. An electrode 52B is provided on the bottom surface and side surface of the extension part 22B, and no electrode is provided on the top surface of the extension part 22B.

[0052] The extension portions 21A and 22A may be molded integrally with the flange portion of the CMCC 10, or may be molded separately and then bonded together. The extension portions 21B and 22B may be molded integrally with the flange portion of the CMCC 10, or may be molded separately and then bonded together.

[0053] 6, in the X-axis direction, there is a space 71 between the extension portion 21A and the extension portion 21B. An electrode 51A and an electrode 51B are provided on both sides of the space 71.

[0054] A bottom surface portion 51A1 of the electrode 51A is provided to protrude from the bottom surface of the extension portion 21A in the direction away from the space 71 in the X-axis direction. A side surface portion 51A2 of the electrode 51A is provided on a side surface of the extension portion 21A at a position far from the space 71. The side surface portion 51A2 extends in the Z-axis direction from the bottom surface portion 51A1.

[0055] A bottom surface portion 51B1 of the electrode 51B is provided to protrude from the bottom surface of the extension portion 21B in the direction away from the space 71 in the X-axis direction. A side surface portion 51B2 of the electrode 51B is provided on a side surface of the extension portion 21B far from the space 71. The side surface portion 51B2 extends in the Z-axis direction from the bottom surface portion 51B1.

[0056] 6, in the X-axis direction, there is a space 72 between extension portion 22A and extension portion 22B. Electrodes 52A and 52B are provided on both sides of space 71.

[0057] A bottom surface portion 52A1 of the electrode 52A is provided to protrude from the bottom surface of the extension portion 22A in the direction away from the space 72 in the X-axis direction. A side surface portion 52A2 of the electrode 52A is provided on a side surface of the extension portion 22A at a position far from the space 72. The side surface portion 52A2 extends in the Z-axis direction from the bottom surface portion 52A1.

[0058] A bottom surface portion 52B1 of the electrode 42B is provided to protrude from the bottom surface of the extension portion 21B in the direction away from the space 72 in the X-axis direction. A side surface portion 52B2 of the electrode 52B is provided on a side surface of the extension portion 22B far from the space 72. The side surface portion 52B2 extends in the Z-axis direction from the bottom surface portion 52B1.

[0059] The electrodes 51A and 51B have portions that face each other across the space 71. By providing electrodes on the bottom and side surfaces of the extensions 21A and 21B in this manner, the electrodes 51A and 51B face each other, forming a capacitance.

[0060] The electrodes 52A and 52B have portions that face each other across the space 72. By providing electrodes on the bottom and side surfaces of the extensions 22A and 22B in this manner, the electrodes 52A and 52B face each other, forming a capacitance.

[0061] (effect) In composite component 100b, extension parts 21A, 21B, 22A, and 22B are connected to CMCC 10, and electrodes are provided on the bottom and side surfaces of the extension parts to form stray capacitance components, i.e., capacitances. In this way, the capacitors can be positioned by extension parts 21A, 21B, 22A, and 22B, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance, and reducing noise.

[0062] 7 is a diagram for explaining and comparing capacitance values ​​obtained by the composite parts according to the respective embodiments, in which the horizontal axis indicates frequency (GHz) and the vertical axis indicates capacitance value (pF).

[0063] Characteristic S0 in Fig. 7 indicates the capacitance value between electrodes on a substrate when no composite component is provided. Characteristic S1 shown by a solid line in Fig. 7 indicates the capacitance value obtained by composite component 100 according to the first embodiment. Characteristic S2 shown by a dashed line in Fig. 7 indicates the capacitance value obtained by composite component 100a according to the second embodiment. Characteristic S3 shown by a dashed line in Fig. 7 indicates the capacitance value obtained by composite component 100b according to the third embodiment.

[0064] At a frequency of 100 MHz, the difference in capacitance from when the composite component is not provided is approximately 0.56 pF for characteristic S1, approximately 0.34 pF for characteristic S2, and approximately 0.44 pF for characteristic S3. It can be seen that at a frequency of 100 MHz, the composite component 100 according to the first embodiment has the largest capacitance value, followed by the composite component 100a according to the second embodiment, and then the composite component 100b according to the third embodiment.

[0065] (Simulation results) The inventors performed a simulation of the capacitance value when the composite component 100 of the first embodiment is removed from the CMCC and mounted on a substrate. Fig. 8 is a diagram showing the composite component 100 removed from the CMCC and mounted on a substrate K. As shown in Fig. 8, an electrode 31A provided on the surface of the extension portion 21A, an electrode 31B provided on the surface of the extension portion 22A, an electrode 32A provided on the surface of the extension portion 21B, and an electrode 32B provided on the surface of the extension portion 22B are mounted on the substrate K. That is, the capacitance due to the electrodes 31A and 31B and the capacitance due to the electrodes 32A and 32B are mounted on the substrate K.

[0066] FIG. 9 is a diagram showing a simulation result for the mounting state shown in FIG. 8. In FIG. 9, the horizontal axis indicates frequency (GHz), and the vertical axis indicates capacitance value (pF). In FIG. 9, when the capacitance of electrodes 31A and 31B and the capacitance of electrodes 32A and 32B are provided on the board K as shown in FIG. 8, the characteristic becomes like S1 shown by the solid line in FIG. 9. In contrast, when the capacitance shown in FIG. 8 is not provided, the characteristic becomes like S0 shown by the two-dot chain line in FIG. 9. At a frequency of 100 MHz, the difference between when the capacitance is provided and when it is not provided is about 0.56 pF. In other words, by providing the capacitance shown in FIG. 8, the capacitance increases by about 0.56 pF at a frequency of 100 MHz.

[0067] (Actual measurement results) The inventors further carried out actual measurements, assuming an increase in capacitance due to the mounting state shown in Fig. 8. Fig. 10 is a diagram for explaining the conditions of the actual measurements.

[0068] In FIG. 10, the board K1 has an insulating part D that separates the ground parts G11, G12, G21, and G22. The CMCC10 is provided so as to straddle the insulating part D, and the capacitors C2 and C3 are provided on either side of the CMCC10. The capacitors C2 and C3 are each set to 0.3 pF. In other words, the total of 0.6 pF of the capacitors C2 and C3 is connected in parallel to the CMCC10. One of the terminals of the CMCC10 mounted on the differential signal line is connected to the port P2, and the other terminal of the CMCC10 is connected to the port P3. One end of the shielded cable 131 is connected to the output port P1 of the board K1, a current probe 133 is placed, and the other end of the shielded cable 131 is terminated with a characteristic impedance of 50 Ω 132. The current probe 133 is connected to a network analyzer, and the distance D13 to the board K1 is set to 5 cm. A network analyzer was connected to ports P2 and P3 to investigate the noise suppression effects of CMCC10 and capacitors C2 and C3.

[0069] Fig. 11 is a diagram showing the noise suppression effect achieved by connecting capacitors C2 and C3 to the CMCC. In Fig. 11, the horizontal axis is frequency (MHz) and the vertical axis is parameter SSC12 (dB). In Fig. 11, the characteristic SS1 shown by the dashed line represents the case where only the CMCC10 is used and capacitors C2 and C3 are not connected. The characteristic SS2 shown by the solid line represents the case where capacitors C2 and C3 are connected in parallel to the CMCC10. As shown in Fig. 11, it can be seen that a noise suppression effect is achieved by connecting capacitors C2 and C3 in parallel to the CMCC10.

[0070] FIG. 12 is a diagram explaining the satisfaction of EMC standards. FIG. 12 is a diagram explaining the relationship with the standard "Recommended Limit Values ​​and Measurement Methods of Disturbance Waves for the Protection of Vehicle-Mounted Receivers" among the standards of the International Special Committee on Radio Interference. In FIG. 12, the horizontal axis indicates frequency (MHz) and the vertical axis indicates noise level (dBμV / m). In FIG. 12, "fGNSS" indicates the limit value of the GNSS band (1.803 to 1.882 GHz). As shown in FIG. 11, when focusing on the GNSS band with strict EMC standards, connecting capacitors C2 and C3 improved performance by up to 2.4 (dB) at 1.803 GHz compared to a single CMCC.

[0071] (Fourth embodiment) (composition) Fig. 13 is a diagram showing a composite component according to the fourth embodiment of the present disclosure mounted on a substrate. In Fig. 13, a composite component 100c according to the fourth embodiment has extensions 21 and 22 provided on both sides of a CMCC 10 in the Y-axis direction.

[0072] The composite parts 100, 100a, and 100b described above all have spaces 71, 72 between the extension parts aligned in the X-axis direction. In contrast, the composite part 100c has extension parts 21 and 22 that do not have the above-mentioned spaces. The extension parts 21 and 22 are substantially rectangular parallelepiped in shape.

[0073] Composite component 100c includes electrodes 31A and 31B facing each other with extension portion 21 in between. Electrode 31A has a bottom surface and side surfaces. Electrode 31B has a bottom surface and side surfaces. The bottom surface of electrode 31A is connected to electrode pad E11 on the front surface of substrate K. The bottom surface of electrode 31B is connected to electrode pad E12 on the front surface of substrate K. Since electrodes 31A and 31B face each other with extension portion 21 in between, they form a stray capacitance component, i.e., capacitance.

[0074] The composite component 100c includes electrodes 32A and 32B facing each other with the extension portion 22 in between. The electrode 32A has a bottom surface and a side surface. The electrode 32B has a bottom surface and a side surface. The bottom surface of the electrode 32A is connected to an electrode pad E21 on the front surface of the substrate K. The bottom surface of the electrode 32B is connected to an electrode pad E21 on the front surface of the substrate K. Since the electrodes 32A and 32B face each other with the extension portion 22 in between, they form a stray capacitance component, i.e., capacitance.

[0075] (effect) Composite component 100c connects extensions 21 and 22 to CMCC 10 and provides electrodes on their bottom and side surfaces to form stray capacitance components, i.e., capacitances. In this way, extensions 21A, 21B, 22A, and 22B can position the capacitors, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance, and reducing noise.

[0076] Fifth embodiment (composition) Fig. 14 is a diagram showing a state in which a composite component according to a fifth embodiment of the present disclosure is mounted on a board. In Fig. 14, a composite component 100d according to the fifth embodiment is configured such that, like the composite component 100c according to the fourth embodiment, extensions 21 and 22 are provided on both sides of the CMCC 10 in the Y-axis direction. Like the composite component 100c according to the fourth embodiment, the composite component 100d has extensions 21 and 22 in which the above-mentioned spaces 71 and 72 are not provided. The extensions 21 and 22 are substantially rectangular parallelepiped in shape.

[0077] The composite component 100d includes electrodes 31AA and 31BB facing each other with the extension portion 21 in between. The electrode 31AA has a top surface in addition to a bottom surface and side surfaces. The electrode 31BB has a top surface in addition to a bottom surface and side surfaces. The bottom surface of the electrode 31AA is connected to an electrode pad E11 on the front surface of the substrate K. The bottom surface of the electrode 31BB is connected to an electrode pad E12 on the front surface of the substrate K. Since the electrodes 31AA and 31BB face each other with the extension portion 21 in between, they form a stray capacitance component, i.e., capacitance.

[0078] The composite component 100d includes electrodes 32AA and 32BB facing each other with the extension portion 22 in between. The electrode 32AA has a top surface in addition to a bottom surface and side surfaces. The electrode 32BB has a top surface in addition to a bottom surface and side surfaces. The bottom surface of the electrode 32AA is connected to an electrode pad E21 on the front surface of the substrate K. The bottom surface of the electrode 32BB is connected to an electrode pad on the front surface of the substrate K. Since the electrodes 32AA and 32BB face each other with the extension portion 22 in between, they form a stray capacitance component, i.e., capacitance.

[0079] (effect) Composite component 100d connects extensions 21 and 22 to CMCC 10 and provides electrodes on the bottom, side and top surfaces of the extensions to form stray capacitance components, i.e., capacitances. In this way, the capacitors can be positioned by extensions 21A, 21B, 22A and 22B, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance and reducing noise.

[0080] Sixth embodiment (composition) Fig. 15 is a diagram showing a composite part according to a sixth embodiment of the present disclosure. In Fig. 15, the composite part 100e according to the sixth embodiment has electrodes having bottom and side portions, similar to the composite part 100b according to the third embodiment. However, unlike the composite part 100b according to the third embodiment, the composite part 100e according to the sixth embodiment has electrodes facing each other without an extension part therebetween.

[0081] That is, the electrode 61A includes a bottom surface portion 61A1 provided on the bottom surface of the extension portion 21A and a side surface portion 61A2 extending in the Z-axis direction from the bottom surface portion 61A1 along the side surface of the extension portion 21A. The electrode 61B includes a bottom surface portion 61B1 provided on the bottom surface of the extension portion 21B and a side surface portion 61B2 extending in the Z-axis direction from the bottom surface portion 61B1 along the side surface of the extension portion 21B. The electrodes 61A and 61B face each other across a space 71.

[0082] The electrode 62A includes a bottom surface portion 62A1 provided on the bottom surface of the extension portion 22A and a side surface portion 62A2 extending in the Z-axis direction from the bottom surface portion 62A1 along the side surface of the extension portion 22A. The electrode 62B includes a bottom surface portion 62B1 provided on the bottom surface of the extension portion 22B and a side surface portion 62B2 extending in the Z-axis direction from the bottom surface portion 62B1 along the side surface of the extension portion 22B. The electrodes 62A and 62B face each other across a space 72.

[0083] (effect) In composite component 100e, extension parts 21A, 21B, 22A, and 22B are connected to CMCC 10, and electrodes are provided on the bottom and side surfaces of the extension parts to form stray capacitance components, i.e., capacitances. In this way, the capacitors can be positioned by extension parts 21A, 21B, 22A, and 22B, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance, and reducing noise.

[0084] Seventh embodiment (composition) Fig. 16 is a diagram showing a composite component according to a seventh embodiment of the present disclosure. In Fig. 16, a composite component 100f according to the seventh embodiment has a configuration in which the electrodes 61A and 62A of the composite component 100e according to the sixth embodiment are replaced with the electrodes 51A and 52A of the composite component 100b according to the third embodiment. The electrodes 51A and 61B form a stray capacitance component, i.e., a capacitance. The electrodes 52A and 62B form a stray capacitance component, i.e., a capacitance.

[0085] (effect) Composite component 100f connects extensions 21A, 21B, 22A, and 22B to CMCC 10, and provides electrodes on the bottom and side surfaces of the extensions to form stray capacitance components, i.e., capacitances. In this way, the capacitors can be positioned by extensions 21A, 21B, 22A, and 22B, reducing variation in the distance between the CMCC and the capacitors, preventing loss of differential balance, and reducing noise.

[0086] With respect to the claims, the present disclosure may take the following forms. <1> a common mode choke coil comprising a winding core portion around which a pair of windings are wound, a first flange portion provided at a first end portion which is one end portion in a first direction which is a direction in which the winding core portion extends, and a second flange portion provided at the other end portion in the first direction, the first flange portion having a first bottom surface and a first side surface and a first top surface which stand up from the first bottom surface, and the second flange portion having a second bottom surface and a second side surface and a second top surface which stand up from the second bottom surface; A first extension portion disposed in a second direction perpendicular to the first direction from the first flange portion; A second extension portion disposed in the second direction from the second flange portion; a first electrode provided on the first bottom surface of the first extension portion; a second electrode provided on the second bottom surface of the second extension portion; Including, A capacitance is formed between the first electrode and the second electrode. Composite parts. <2> The first electrode is formed on the first bottom surface of the first extension portion and on a first side surface of the first extension portion. <1> The composite part according to claim 1. <3> The first electrode is further formed on a first top surface of the first extension portion, which is a surface opposite to the first bottom surface of the first extension portion. <2> The composite part according to claim 1. <4> The second electrode is formed on the second bottom surface of the second extension portion and on a second side surface of the second extension portion. <1> from <3> 2. The composite part according to claim 1 . <5> The second electrode is further formed on a second top surface of the second extension portion, which is a surface opposite to the second bottom surface of the second extension portion. <4> The composite part according to claim 1. <6> A portion of the first electrode formed on a first side surface of the first extension portion and a portion of the second electrode formed on a second side surface of the second extension portion are disposed at positions facing each other. <4> or <5> The composite part according to claim 1. <7> The first electrode and the second electrode are disposed in close proximity to each other, forming a capacitance between the first electrode and the second electrode. <1> from <6> 2. The composite part according to claim 1 . <8> <1> from <7> A composite part according to any one of the above items, a pair of differential transmission lines, an insulating section extending in a direction intersecting a direction in which the differential transmission lines extend, and a first ground section and a second ground section respectively provided on both sides of the insulating section with the insulating section therebetween; A substrate having Including, the common mode choke coil of the composite component is inserted at an intersection between the differential transmission line and the insulating portion, A mounting structure in which the first electrode of the common mode choke coil is connected to the first ground portion, and the second electrode of the common mode choke coil is connected to the second ground portion. [Explanation of symbols]

[0087] 11 Winding core 12A, 12B flange section 14A, 14B windings 21, 21A, 21B, 22, 22A, 22B Extensions 31A, 31B, 32A, 32B, 31AA, 31BB, 32AA, 32BB, 41A, 41B, 42A, 42B, 51A, 51B, 52A, 52B, 61A, 61B, 62A, 62B electrode 71, 72 space 100, 100a, 100b, 100c, 100d, 100e, 100f composite parts 201, 202, 203, 204 Wiring CMCC Common Mode Choke Coil D Insulation G11, G12, G21, G22 Ground section K, K1 board

Claims

1. a common mode choke coil comprising a winding core portion around which a pair of windings are wound, a first flange portion provided at a first end portion which is one end portion in a first direction which is a direction in which the winding core portion extends, and a second flange portion provided at the other end portion in the first direction, the first flange portion having a first bottom surface, and a first side surface and a first top surface which stand up from the first bottom surface, and the second flange portion having a second bottom surface, and a second side surface and a second top surface which stand up from the second bottom surface; A first extension portion disposed in a second direction perpendicular to the first direction from the first flange portion; a second extension portion disposed in the second direction from the second flange portion; a first electrode provided on the first bottom surface of the first extension portion; A second electrode provided on the second bottom surface of the second extension portion; Including, A capacitance is formed between the first electrode and the second electrode. Composite parts.

2. The first electrode is formed on the first bottom surface of the first extension portion and on a first side surface of the first extension portion. The composite part according to claim 1 .

3. The first electrode is further formed on a first top surface of the first extension portion, which is a surface opposite to the first bottom surface of the first extension portion. The composite part according to claim 2 .

4. The second electrode is formed on the second bottom surface of the second extension portion and on the second side surface of the second extension portion. The composite part according to any one of claims 1 to 3.

5. The second electrode is further formed on a second top surface of the second extension portion, which is a surface opposite to the second bottom surface of the second extension portion. The composite part according to claim 4.

6. The composite part according to claim 4 , wherein a portion of the first electrode formed on a first side surface of the first extension portion and a portion of the second electrode formed on a second side surface of the second extension portion are positioned opposite each other.

7. 3. The composite part according to claim 1, wherein the first electrode and the second electrode are disposed in close proximity to each other, and a capacitance is formed between the first electrode and the second electrode.

8. The composite part according to claim 1 or 2, a pair of differential transmission lines, an insulating section extending in a direction intersecting a direction in which the differential transmission lines extend, and a first ground section and a second ground section respectively provided on both sides of the insulating section with the insulating section therebetween; A substrate having Including, the common mode choke coil of the composite component is inserted at an intersection between the differential transmission line and the insulating portion, A mounting structure in which the first electrode of the common mode choke coil is connected to the first ground portion, and the second electrode of the common mode choke coil is connected to the second ground portion.

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