Laminated chip beads

Abstract

The utility model discloses a laminated sheet type magnetic bead relates to electronic components technical field, wherein, laminated sheet type magnetic bead includes upper diaphragm and lower diaphragm, is equipped with inner electrode coil between upper diaphragm and lower diaphragm, and inner electrode coil includes the coil body and lead-out end that are connected, and the lead-out end has the horizontal section that sets along the width direction of lower diaphragm and the vertical section that sets along lower diaphragm length direction, and the vertical section is connected with the coil body, and the length of horizontal section is 0.66 1.1 times of the coil width of the coil body connected with the vertical section. The above setting mode can reduce the deformation and displacement of structure through setting shorter lead-out end, thereby reduce the possibility of appearing internal cavity or bubble.

Description

Technical Field

[0001] This utility model relates to the field of electronic component manufacturing technology, and in particular to a stacked chip magnetic bead. Background Technology

[0002] Multilayer ferrite beads are electronic components manufactured using a stacked structure of multiple ferrite substrates and internal electrode coils. They are mainly used for filtering (absorbing and dissipating high-frequency noise) and suppressing electromagnetic interference, and are widely used in various electronic devices.

[0003] In the manufacturing process of multilayer chip ferrite beads, existing technologies typically increase the length of the leads to improve the performance and reliability of the beads, ensuring a good connection with the internal coil (coil body) and sufficient mechanical strength. However, when a very large current passes through the ferrite bead, the leads need to withstand greater electrical and thermal stress. If the lead length is too long, it may lead to overheating, burnout, or mechanical deformation, thus affecting the normal operation of the ferrite bead. Utility Model Content

[0004] The main purpose of this invention is to propose a stacked sheet magnetic bead, which aims to solve the technical problem in related technologies where the lead-out ends overheat, burn out, or mechanically deform due to excessive length when a large current passes through the magnetic bead.

[0005] To achieve the above objectives, this utility model proposes a stacked sheet magnetic bead, which includes an upper diaphragm and a lower diaphragm. An inner electrode coil is provided between the upper diaphragm and the lower diaphragm. The inner electrode coil includes a coil body and a lead-out end connected to each other. The lead-out end has a transverse section arranged along the width direction of the lower diaphragm and a vertical section arranged along the length direction of the lower diaphragm. The vertical section is connected to the coil body. The length of the transverse section is 0.66-1.1 times the coil width of the coil body connected to the vertical section.

[0006] In one embodiment, the middle part of the transverse segment is connected to the end of the vertical segment near the transverse segment, and the length ratio of the transverse segment to the vertical segment is 1:0.4.

[0007] In one embodiment, the length of the transverse segment is 33-165 micrometers.

[0008] In one embodiment, the thickness of the lead-out end is 15 micrometers to 30 micrometers.

[0009] In one embodiment, the inner electrode coil includes a plurality of coil bodies and two leads, wherein each coil body is arranged alternately along the extension direction from the lower diaphragm to the upper diaphragm; wherein one outermost coil body is connected to one of the leads, and the other outermost coil body is connected to the other lead.

[0010] In one embodiment, the inner electrode coil includes a plurality of coil bodies and two leads, each coil body being located in the same plane and spaced apart, wherein one outermost coil body is connected to one of the leads, and the other outermost coil body is connected to the other lead.

[0011] In one embodiment, the coil body has a single coil layer.

[0012] Alternatively, the coil body may have multiple coil layers.

[0013] In one embodiment, the inner electrode coil is made of silver;

[0014] And / or, the upper membrane and the lower membrane are made of ferrite material.

[0015] In one embodiment, the coil body is arranged in a U-shape;

[0016] Alternatively, the coil body may be arranged in an N-shape.

[0017] Because the coil body is close to the lead-out end, the expansion and contraction of the coil body can create internal cavities or squeeze out air bubbles in the original structural gaps. The technical solution of this invention optimizes and shortens the lateral segment length of the lead-out end of the inner electrode coil. Compared to previous products where the lateral segment length was 1.2-2 times the width of the coil body connected to the lead-out end, the lead-out end length provided in this application is shortened by approximately 55%. This ensures a more stable connection between the lead-out end and the coil body, making the overall structure of the inner electrode coil more compact and stable. During the production and use of multilayer sheet magnetic beads, under the influence of various external forces and internal stresses, a shorter lead-out end can reduce structural deformation and displacement, thereby reducing the possibility of internal cavities or air bubbles. Simultaneously, the consistent width of the coil body and the lateral segment avoids excessive thickness differences, reducing the risk of collapse or accumulation during ink printing. Standardizing the lateral segment length can reduce the probability of lamination misalignment, reduce interlayer air retention, and indirectly suppress air bubble formation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a structure of an embodiment of the stacked sheet magnetic bead provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of the internal electrode coil provided by this utility model;

[0021] Figure 3 This is a schematic diagram of another embodiment of the internal electrode coil provided by this utility model.

[0022] Explanation of icon numbers:

[0023] 100. Laminated magnetic bead; 1. Upper diaphragm; 2. Lower diaphragm; 3. Inner electrode coil; 31. Coil body; 32. Lead-out terminal; 321. Horizontal section; 322. Vertical section.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] This utility model proposes a stacked sheet magnetic bead 100.

[0029] Please see Figures 1 to 3 In one embodiment of the present invention, the stacked sheet magnetic bead 100 includes an upper diaphragm 1 and a lower diaphragm 2, with an inner electrode coil 3 disposed between the upper diaphragm 1 and the lower diaphragm 2. In one embodiment of the present invention, the inner electrode coil 3 includes a coil body 31 and a lead-out end 32 connected to each other. The lead-out end 32 has a transverse section 321 disposed along the width direction of the lower diaphragm 2 and a vertical section 322 disposed along the length direction of the lower diaphragm 2. The vertical section 322 is connected to the coil body 31, and the length of the transverse section 321 is 0.66-1.1 times the coil width of the coil body 31 connected to the vertical section 322.

[0030] In this embodiment, the multilayer chip magnetic bead 100 can be applied to electronic fields such as mobile phones, communication fields, and industrial fields to suppress electromagnetic interference in circuits; however, this application is not limited to these applications. It should be noted that the horizontal segment 321 and vertical segment 322 of the lead-out terminal 32 provided in this application allow current flowing from the coil body 31 to enter the lead-out terminal 32 and be transmitted to the external circuit through a shorter path. This shortens the horizontal length of the lead-out terminal 32, reduces path loss during current transmission, thereby reducing DC resistance and improving current transmission efficiency. It is understood that the lead-out terminal 32 can be made of common technical conductor materials, such as copper or aluminum, and fabricated with horizontal segment 321 and vertical segment 322 through microfabrication processes such as photolithography and etching. The upper diaphragm 1 and the lower diaphragm 2 typically use magnetic materials with high permeability and low loss, such as ferrite materials. In previous products, the length of the horizontal segment 321 was 1.2-2 times the width of the coil body 31 connected to the lead-out terminal 32. In this application, the length of the lead-out terminal 32 is shortened by approximately 55%, meaning the length of the horizontal segment 321 is 0.66-1.1 times the coil width of the coil body 31 connected to the vertical segment 322. Specifically, when the coil width of the coil body 31 is 50 micrometers, the length of the horizontal segment 321 in this application ranges from 33 to 55 micrometers to suit high-frequency applications; when the coil width of the coil body 31 is 100 micrometers, the length of the horizontal segment 321 in this application ranges from 66 to 110 micrometers to suit general applications; and when the coil width of the coil body 31 is 150 micrometers, the length of the horizontal segment 321 in this application ranges from 99 to 165 micrometers to suit high-current applications. Preferably, to increase the thickness and strength of the lead-out terminal 32, the lead-out terminal 32 provided in this embodiment is typically printed twice.

[0031] Because the coil body 31 is close to the lead-out end 32, the expansion and contraction of the coil body 31 can create internal cavities or squeeze out air bubbles in the original structural gaps. The technical solution of this utility model optimizes and shortens the length of the transverse segment 321 of the lead-out end 32 of the inner electrode coil 3. Compared to previous products where the length of the transverse segment 321 was 1.2-2 times the width of the coil body 31 connected to the lead-out end 32, the length of the lead-out end 32 provided in this application is shortened by about 55%. This ensures a more stable connection between the lead-out end 32 and the coil body 31, making the overall structure of the inner electrode coil 3 more compact and stable. During the production and use of the multilayer sheet magnetic bead 100, when subjected to various external forces and internal stresses, the shorter lead-out end 32 can reduce structural deformation and displacement, thereby reducing the possibility of internal cavities or air bubbles. At the same time, the coil body 31 and the transverse segment 321 have the same width, avoiding excessive thickness differences and reducing the risk of collapse or accumulation during paste printing. Standardizing the length of the 321 transverse segment can reduce the probability of stacking misalignment, reduce interlayer air retention, and indirectly suppress bubble formation.

[0032] In one embodiment of the present invention, the middle part of the horizontal segment 321 is connected to the end of the vertical segment 322 near the horizontal segment 321, and the length ratio of the horizontal segment 321 to the vertical segment 322 is 1:0.4.

[0033] In this embodiment, combined with Figure 2 By connecting the middle of the horizontal segment 321 to the end of the vertical segment 322 near the horizontal segment 321, and by making the vertical segment 322 shorter, the current flowing out of the coil body 31 can more quickly enter the horizontal segment 321 of the lead-out terminal 32 and be transmitted to the external circuit. This optimized current path reduces the impedance of the lead-out terminal 32, reducing energy loss during high-frequency signal transmission. The shorter vertical segment 322 and the specific connection method help to concentrate the magnetic field more around the coil body 31, reducing magnetic field leakage, thereby improving the inductance and impedance performance of the ferrite bead, enhancing its ability to suppress electromagnetic interference, and enabling the ferrite bead to exhibit better stability and reliability in complex electromagnetic environments. It should be noted that when the length of the horizontal segment 321 is adjusted, the length of the vertical segment 322 is also adjusted accordingly.

[0034] In one embodiment of this utility model, the length of the transverse segment 321 is 33-165 micrometers.

[0035] In this embodiment, the length of the lateral segment 321 provided by this application can achieve extreme compression of the lateral dimension of the magnetic bead, meeting the miniaturization requirements of electronic devices. The shorter lead-out length 32 reduces the amount of metal conductor material used, thereby lowering raw material costs.

[0036] In one embodiment of this utility model, the thickness of the lead-out end 32 is 15-30 micrometers.

[0037] In this embodiment, when the inner electrode coil 3 is applied in a high-current scenario, to avoid it bearing a large current and burning out, the thickness of the lead-out terminal 32 provided in this application is 15-30 micrometers. The increased thickness of the lead-out terminal 32 increases the conductive area, reduces the current density, decreases bubble generation, and alleviates the pinhole phenomenon. The increased thickness improves heat dissipation performance, lowers the operating temperature, inhibits excessive electrolytic reaction, reduces bubble formation, and lowers the risk of pinholes. The thickened lead-out terminal 32 makes the electric field distribution more uniform, avoiding excessively strong local electric fields that could lead to violent electrolytic reactions, thus reducing bubble generation at the source and suppressing the pinhole phenomenon. It is understood that the material of the inner electrode coil 3 is selected from materials with high conductivity and good heat dissipation, such as copper or aluminum, and is not limited here.

[0038] In one embodiment of the present invention, the inner electrode coil 3 includes a plurality of coil bodies 31 and two leads 32. Each coil body 31 is arranged alternately along the extension direction from the lower diaphragm 2 to the upper diaphragm 1. One of the outermost coil bodies 31 is connected to one of the leads 32, and the other outermost coil body 31 is connected to the other lead 32.

[0039] In this embodiment, combined with Figure 3 To further optimize space utilization, multiple coil bodies 31 are arranged in an alternating pattern along the extension direction from the lower diaphragm 2 to the upper diaphragm 1, enabling a more compact layout within a limited space, improving the integration of the ferrite bead, and meeting the miniaturization requirements of electronic devices. The multiple coil bodies 31 form a parallel circuit, evenly distributing the current, reducing current density, minimizing Joule heat loss, improving current transmission efficiency, and enhancing the performance and reliability of the ferrite bead in high-current scenarios. It is understandable that highly conductive materials (such as copper or aluminum) are used to fabricate the coil bodies 31 and the leads 32 to reduce resistance. An insulating layer is added between adjacent coil bodies 31 to prevent short circuits and improve safety and reliability.

[0040] In one embodiment of the present invention, the inner electrode coil 3 includes a plurality of coil bodies 31 and two leads 32. Each coil body 31 is located in the same plane and is distributed at intervals. The outermost coil body 31 is connected to one of the leads 32, and the other outermost coil body 31 is connected to the other lead 32.

[0041] In this embodiment, combined with Figure 2 To achieve high integration and miniaturization, this embodiment places multiple coil bodies 31 on the same plane and distributes them at intervals to achieve efficient utilization of the internal space of the ferrite bead. This allows the ferrite bead to have a multi-coil structure while being miniaturized, meeting the requirements of high-density circuits. The multiple coil bodies 31 can evenly distribute the current, reducing the current density of each coil, reducing Joule heat loss, improving current transmission efficiency, and enhancing the performance and reliability of the ferrite bead in high-current scenarios.

[0042] In one embodiment of this utility model, the coil body 31 has a single coil layer.

[0043] Alternatively, the coil body 31 may have multiple coil layers.

[0044] In this embodiment, the single-layer coil body 31 can reduce interlayer parasitic parameters, reduce high-frequency signal transmission loss and reflection, and improve the high-frequency performance of the ferrite bead.

[0045] The multilayer coil body 31 increases inductance and impedance, improving the ferrite bead's ability to suppress electromagnetic interference and enhancing low-frequency performance. The number of layers here includes, but is not limited to, two-layer or three-layer coils.

[0046] In one embodiment of this utility model, the coil body 31 is made of silver;

[0047] And / or, the upper membrane 1 and the lower membrane 2 are made of ferrite material.

[0048] In this embodiment, the high conductivity of silver can reduce the resistance of the coil body 31. This reduced resistance significantly decreases the heat generated when current flows, improving the efficiency and stability of current transmission. Silver also has good corrosion resistance and oxidation resistance, ensuring the stability and reliability of the coil body 31 during long-term use and extending the lifespan of the magnetic bead. It is understood that during the manufacturing process, appropriate surface treatments, such as cleaning and polishing, are applied to the silver material to improve its conductivity and weldability.

[0049] Ferrite materials possess high permeability, effectively guiding and concentrating magnetic fields, improving the inductance and impedance performance of ferrite beads while maintaining low losses, thus enhancing their electromagnetic interference suppression capabilities at high frequencies. Furthermore, the ferrite film effectively shields against external magnetic field interference, reducing the impact of the internal magnetic field on the external environment and improving the electromagnetic compatibility of the ferrite bead. It is understood that the ferrite material used here includes, but is not limited to, manganese-zinc ferrite films or nickel-zinc ferrite films. During the lamination stage, the ferrite film is laminated with the silver coil body 31 to ensure a tight bond between the film and the coil. During lamination, process parameters such as temperature and pressure are strictly controlled to prevent film deformation or cracking. Finally, encapsulation is performed to form a complete ferrite bead product.

[0050] In one embodiment of this utility model, the coil body 31 is arranged in a U-shape;

[0051] Alternatively, the coil body 31 is arranged in an N-shape.

[0052] In this embodiment, the U-shaped coil body 31 can effectively concentrate the magnetic field, enhance magnetic coupling, increase inductance and impedance, and improve electromagnetic interference suppression capability. The U-shaped design achieves a longer coil length within a limited space, which helps to miniaturize the magnetic bead and meet the size requirements of electronic devices. It can be understood that the U-shaped coil body 31 can be staggered along the extension direction from the lower diaphragm 2 to the upper diaphragm 1 to further optimize space utilization, achieve a longer coil length within a limited space, and contribute to the miniaturization of the magnetic bead.

[0053] The N-shaped coil body 31 increases its effective length through multiple folds, thereby improving inductance and enhancing low-frequency electromagnetic interference suppression. The N-shaped design makes the magnetic field distribution more uniform, reducing internal magnetic field fluctuations in the ferrite bead and improving electromagnetic compatibility. It can be understood that the N-shaped coil bodies 31 can be distributed in the same plane and spaced apart to make the magnetic field distribution more uniform, reduce internal magnetic field fluctuations in the ferrite bead, and improve electromagnetic compatibility.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stacked sheet magnetic bead, the stacked sheet magnetic bead comprising an upper diaphragm (1) and a lower diaphragm (2), wherein an internal electrode coil (3) is provided between the upper diaphragm (1) and the lower diaphragm (2), characterized in that, The inner electrode coil (3) includes a coil body (31) and a lead-out end (32) connected to each other. The lead-out end (32) has a transverse section (321) arranged along the width direction of the lower diaphragm (2) and a vertical section (322) arranged along the length direction of the lower diaphragm (2). The vertical section (322) is connected to the coil body (31). The length of the transverse section (321) is 0.66-1.1 times the coil width of the coil body (31) connected to the vertical section (322).

2. The stacked sheet magnetic bead as described in claim 1, characterized in that, The middle part of the horizontal segment (321) is connected to the end of the vertical segment (322) near the horizontal segment (321), and the length ratio of the horizontal segment (321) to the vertical segment (322) is 1:0.

4.

3. The stacked sheet magnetic bead as described in claim 1, characterized in that, The length of the transverse segment (321) is 33-165 micrometers.

4. The stacked sheet magnetic bead as described in claim 1, characterized in that, The thickness of the lead-out end (32) is 15 micrometers to 30 micrometers.

5. The laminated sheet magnetic bead as described in any one of claims 1 to 4, characterized in that, The inner electrode coil (3) includes a plurality of coil bodies (31) and two leads (32). Each coil body (31) is arranged alternately along the extension direction from the lower diaphragm (2) to the upper diaphragm (1). One of the outermost coil bodies (31) is connected to one of the leads (32), and the other outermost coil body (31) is connected to the other lead (32).

6. The laminated sheet magnetic bead as described in any one of claims 1 to 4, characterized in that, The inner electrode coil (3) includes a plurality of coil bodies (31) and two leads (32). Each coil body (31) is located in the same plane and is spaced apart. One of the outermost coil bodies (31) is connected to one of the leads (32), and the other outermost coil body (31) is connected to the other lead (32).

7. The stacked sheet magnetic bead as described in claim 6, characterized in that, The coil body (31) has a single coil layer. Alternatively, the coil body (31) may have multiple coil layers.

8. The laminated sheet magnetic bead as described in any one of claims 1 to 4, characterized in that, The inner electrode coil (3) is made of silver; And / or, the upper membrane (1) and the lower membrane (2) are ferrite membranes.

9. The laminated sheet magnetic bead as described in any one of claims 1 to 4, characterized in that, The coil body (31) is arranged in a U-shape; Alternatively, the coil body (31) is arranged in an N-shape.

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