Electromagnetic shielding assembly and terminal equipment

Abstract

The invention provides an electromagnetic shielding assembly and terminal equipment, and belongs to the technical field of electronics. The electromagnetic shielding assembly comprises a first shielding part and a second shielding part. The first shielding part is located on a first side face, close to an interference source, of a disturbed body, and the second shielding part is located on a second side face, adjacent to the first side face, of the disturbed body; at least one of the first shielding part and the second shielding part respectively comprises at least two electromagnetic shielding layers, the electromagnetic parameters of two adjacent electromagnetic shielding layers in the at least two electromagnetic shielding layers are different, and the difference value of the electromagnetic parameters is greater than or equal to a target value. The electromagnetic shielding assembly not only can isolate high-frequency electromagnetic interference, but also can isolate low-frequency electromagnetic interference with high diffraction capability.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to an electromagnetic shielding component and terminal equipment. Background Technology

[0002] Mobile phones and other terminal devices need to integrate many electrical components such as motherboards, cameras, and speakers. Some of these electrical components (such as motherboards) will generate electromagnetic radiation during operation. This electromagnetic radiation will cause electromagnetic interference to other electrical components (such as cameras and speakers), affecting the normal operation of these electrical components.

[0003] To address this issue, related technologies typically involve installing shielding covers on these electrical components to isolate electromagnetic radiation. However, as the electromagnetic environment in terminal equipment becomes increasingly complex, the shielding effect of these covers is no longer sufficient, necessitating the search for more effective electromagnetic shielding methods. Summary of the Invention

[0004] This application provides an electromagnetic shielding component and terminal device, which can solve the problem that shielding covers in related technologies cannot meet the usage requirements.

[0005] The technical solution is as follows: On the one hand, an electromagnetic shielding assembly is provided, the electromagnetic shielding assembly comprising: a first shielding portion and a second shielding portion; The first shielding portion is located on a first side of the disturbed object close to the interference source, and the second shielding portion is located on a second side of the disturbed object adjacent to the first side. At least one of the first shielding portion and the second shielding portion includes at least two electromagnetic shielding layers, wherein the electromagnetic parameters of two adjacent electromagnetic shielding layers are different, and the difference in electromagnetic parameters is greater than or equal to a target value.

[0006] In some embodiments, among two adjacent electromagnetic shielding layers, the electromagnetic parameter of the electromagnetic shielding layer closer to the interference source is greater than the electromagnetic parameter of the electromagnetic shielding layer farther from the interference source.

[0007] In some embodiments, the ratio of the target value to the electromagnetic parameter of the electromagnetic shielding layer furthest from the interference source in two adjacent electromagnetic shielding layers is 20%-30%.

[0008] In some embodiments, the ratio of the target value to the electromagnetic parameter of the electromagnetic shielding layer furthest from the interference source in two adjacent electromagnetic shielding layers is 25%.

[0009] In some embodiments, the electromagnetic parameters include at least one of saturation magnetization, relative permeability, and electrical conductivity.

[0010] In some embodiments, the area of ​​the orthographic projection of the first shielding portion onto the plane containing the first side surface is greater than or equal to 80% of the area of ​​the first side surface; And / or, The interference source includes a third side surface near the object being disturbed, the area of ​​the first shielding portion projected onto the plane of the third side surface is greater than or equal to 60% of the area of ​​the third side surface, and the distance between the first shielding portion and the third side surface is greater than or equal to 0.1 mm.

[0011] In some embodiments, the number of the second shielding portions is multiple, the number of the second sides is multiple, and different second sides are provided with different second shielding portions.

[0012] In some embodiments, when the first shielding portion includes at least two electromagnetic shielding layers, the first shielding portion further includes a connecting layer, the connecting layer being located between two adjacent electromagnetic shielding layers; And / or, When the second shielding portion includes at least two electromagnetic shielding layers, the second shielding portion further includes a connecting layer, which is located between two adjacent electromagnetic shielding layers.

[0013] In some embodiments, each of the electromagnetic shielding layers includes a magnetic shielding layer and an electron shielding layer; The magnetic isolation layer and the electronic isolation layer are arranged in alternating layers.

[0014] In some embodiments, among the two magnetic isolation sub-layers located on both sides of the same electronic isolation layer, the magnetic permeability parameter of the magnetic isolation sub-layer closer to the interference source is greater than that of the magnetic isolation sub-layer farther from the interference source. In the two electron isolation layers located on both sides of the same magnetic isolation sub-layer, the conductivity parameter of the electron isolation layer closer to the interference source is greater than that of the electron isolation layer farther away from the interference source.

[0015] In some embodiments, among the two magnetic isolation sub-layers located on both sides of the same electronic isolation layer, the thickness of the magnetic isolation sub-layer closer to the interference source is greater than the thickness of the magnetic isolation sub-layer farther from the interference source; In the two electron isolation layers located on both sides of the same magnetic isolation sub-layer, the thickness of the electron isolation layer closer to the interference source is greater than the thickness of the electron isolation layer farther away from the interference source.

[0016] In some embodiments, the ratio of the conductivity of adjacent electron-isolating layers and magnetic-isolating layers is greater than or equal to 10; And / or, the ratio of the relative permeability of adjacent electron-isolating layers and magnetic-isolating sublayers is less than or equal to 10; And / or, the ratio of the saturation magnetization of adjacent electron-isolating layers and magnetic-isolating layers is less than or equal to 10.

[0017] On the other hand, a terminal device is provided, which includes the electromagnetic shielding component described in this application.

[0018] The beneficial effects of the technical solution provided in this application include at least the following: The electromagnetic shielding component of this application is divided into two parts. The first shielding part is arranged between the object being disturbed and the interference source, playing a primary electromagnetic protection role. The second shielding part is arranged on the side of the object being disturbed, playing a lateral electromagnetic protection role. It can not only isolate high-frequency electromagnetic interference, but also low-frequency electromagnetic interference with strong diffraction ability. Moreover, at least one of the first shielding part and the second shielding part includes at least two electromagnetic shielding layers with different electromagnetic parameters. By utilizing at least two electromagnetic shielding layers with different electromagnetic parameters, the electromagnetic characteristics of the first shielding part and the second shielding part are discontinuous in the stacking direction (i.e., the thickness direction). This discontinuous electromagnetic characteristic can greatly improve the attenuation effect of electromagnetic energy, and can effectively absorb and attenuate both high-frequency and low-frequency electromagnetic interference. Thus, the first shielding part and the second shielding part can play a better electromagnetic protection role. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram showing the relative positions of the electromagnetic shielding component, the object being disturbed, and the interference source provided in the embodiments of this application; Figure 2 This is a cross-sectional view of the electromagnetic shielding assembly provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the electromagnetic shielding assembly provided in the embodiments of this application; Figure 4 This is a structural cross-sectional view of an electromagnetic shielding assembly provided in another embodiment of this application; Figure 5 This is a cross-sectional view of the electromagnetic shielding layer provided in another embodiment of this application; Figure 6 This is a cross-sectional view of the electromagnetic shielding layer provided in another embodiment of this application; Figure 7 This is a cross-sectional view of the electromagnetic shielding layer provided in another embodiment of this application; Figure 8 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application.

[0021] The reference numerals in the figure are respectively: 100. The object being disturbed; 1001. First side view; 1002. Second side view; 1003. Working side view; 200. Interference source; 2001, Third Side; 300. Equipment housing; 400. Motherboard; 1. First shielding section; 2. Second shielding section; 3. Electromagnetic shielding layer; 31. Magnetic isolation layer; 32. Electron isolation layer; 4. Connecting layer; 5. Gap structure. Detailed Implementation

[0022] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0023] In the description of this application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] It should be understood that in this application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Communication connection" can refer to the transmission of electrical signals, including wireless communication connections and wired communication connections. Wireless communication connections do not require a physical medium and are not a connection relationship that limits the product structure. "Connection" and "connected" can both refer to a mechanical or physical connection relationship, that is, A and B being connected or connected can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate.

[0025] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0026] Terminal devices, such as mobile phones, may include several electrical components. Some of these components emit electromagnetic radiation during operation, which may interfere with the normal operation of other nearby electrical components. This electromagnetic radiation is called electromagnetic interference (EMI), which is strongest at the source and decreases exponentially with distance.

[0027] To address this issue, related technologies employ conductive shells or conductor cages (known as Faraday shields or electromagnetic shielding covers) to surround (one or more) electrical components, reducing or blocking the electric field around them and effectively mitigating electromagnetic interference. However, with the development of electronic technology and societal demands, consumers increasingly require thinner, smaller, and more portable terminal devices. This forces the internal stacking of these devices to become more compact, compressing the spacing between electrical components and exacerbating electromagnetic interference. Conductive shells or conductor cages are no longer sufficient to meet electromagnetic shielding requirements.

[0028] In addition, mobile phones and other terminal devices not only contain high-frequency electromagnetic radiation, but also a large amount of low-frequency electromagnetic radiation (e.g., in the frequency range of 10-10). 6 (Electromagnetic radiation of Hz), among which low-frequency electromagnetic radiation has a strong diffraction ability and is not easily absorbed. The electromagnetic shielding structure of related technologies has very limited shielding effect on low-frequency electromagnetic radiation.

[0029] Therefore, this application provides an electromagnetic shielding component that can not only isolate high-frequency electromagnetic interference, but also low-frequency electromagnetic interference with strong diffraction ability; moreover, the shielding part can include at least two electromagnetic shielding layers with different electromagnetic parameters, which can effectively absorb and attenuate both high-frequency and low-frequency electromagnetic interference, thereby achieving a better electromagnetic protection effect.

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0031] On the one hand, combined with Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides an electromagnetic shielding component, which includes a first shielding part 1 and a second shielding part 2.

[0032] The first shielding part 1 is located on the first side 1001 of the disturbed body 100 near the interference source 200, and the second shielding part 2 is located on the second side 1002 of the disturbed body 100 adjacent to the first side 1001.

[0033] At least one of the first shielding portion 1 and the second shielding portion 2 includes at least two electromagnetic shielding layers 3, wherein the electromagnetic parameters of two adjacent electromagnetic shielding layers 3 are different, and the difference in electromagnetic parameters between two adjacent electromagnetic shielding layers 3 is greater than or equal to a target value.

[0034] The electromagnetic shielding assembly of this embodiment is divided into two parts. The first shielding part 1 is arranged between the disturbed object 100 and the interference source 200, and plays the main electromagnetic protection role. The second shielding part 2 is arranged on the side of the disturbed object 100, and plays the role of lateral electromagnetic protection. It can not only isolate high-frequency electromagnetic interference, but also isolate low-frequency electromagnetic interference with strong diffraction ability.

[0035] Furthermore, at least one of the first shielding part 1 and the second shielding part 2 includes at least two electromagnetic shielding layers 3 with different electromagnetic parameters. By utilizing at least two electromagnetic shielding layers 3 with different electromagnetic parameters, the electromagnetic characteristics of the first shielding part 1 and the second shielding part 2 are discontinuous in the stacking direction (i.e., the thickness direction). This discontinuous electromagnetic characteristic can greatly improve the attenuation effect of electromagnetic energy and can effectively absorb and attenuate both high-frequency electromagnetic interference and low-frequency electromagnetic interference. Thus, the first shielding part 1 and the second shielding part 2 can play a better electromagnetic protection role.

[0036] In this embodiment, the difference in electromagnetic parameters between two adjacent electromagnetic shielding layers 3 needs to be greater than or equal to the target value, so that the electromagnetic characteristics between the two adjacent electromagnetic shielding layers 3 are discontinuous, thereby having a strong electromagnetic attenuation effect. The target value can be selected according to the working characteristics of the interference source 200 and the disturbed body 100, etc., and this embodiment does not make specific limitations on it.

[0037] The first shielding part 1 is located in the direct radiation direction of the interference source 200, which can isolate and absorb the high-frequency and low-frequency electromagnetic interference directly radiated. The second shielding part 2 is located in the radiation direction of the disturbed body 100 that is not directly facing the interference source 200, which can isolate and absorb the low-frequency electromagnetic interference diffracted, thereby achieving effective absorption and attenuation of high-frequency and low-frequency electromagnetic interference.

[0038] In some possible implementations, the first shielding portion 1 includes at least two electromagnetic shielding layers 3, or the second shielding portion 2 includes at least two electromagnetic shielding layers 3, or the first shielding portion 1 and the second shielding portion 2 each include at least two electromagnetic shielding layers 3.

[0039] For example, the number of electromagnetic shielding layers 3 in the first shielding portion 1 and the second shielding portion 2 can be the same or different. Specifically, the number of electromagnetic shielding layers 3 can be, for example, two, three, four, etc.

[0040] When there are three or more electromagnetic shielding layers 3, the electromagnetic parameters of all electromagnetic shielding layers 3 can be different or can change periodically. For example, the electromagnetic parameters of the first electromagnetic shielding layer 3 and the third electromagnetic shielding layer 3 are the same, while the electromagnetic parameters of the second electromagnetic shielding layer 3 are different from each other.

[0041] In some possible implementations, the interference source 200 may be an integrated circuit (IC) and other electrical devices mounted on a circuit board or substrate, or a multi-chip module (MCM) which is an IC package in which multiple electrical components and / or surface-mounted devices (SMDs) are mounted on a substrate that includes electrical wiring for interconnecting the components.

[0042] When the electromagnetic shielding component of this embodiment is used in a terminal device scenario, the interference source 200 may be the motherboard 400 and electrical components such as chips installed on the motherboard 400, or electrical wiring on the motherboard 400 for interconnecting components.

[0043] The aforementioned electrical components may generate high-frequency and / or low-frequency electromagnetic radiation during operation.

[0044] In some possible implementations, the disturbed object 100 can be an electromagnetically sensitive device, such as a camera, a magnetic sensor, a speaker, a compass sensor, a Hall sensor, etc.

[0045] In some possible implementations, when the electromagnetic shielding assembly is used in a terminal device scenario, the interference source 200 and the affected body 100 are arranged at intervals along a first direction (e.g., the length and width directions) of the terminal device, which is not the thickness direction. The first shielding portion 1 is arranged between the interference source 200 and the affected body 100, that is, the first side 1001 of the affected body 100. This first side 1001 is the side of the affected body 100 closest to the interference source 200 among the two sides along the first direction. The second side 1002 where the second shielding portion 2 is located can be one of multiple sides of the interference source 200 parallel to the first direction. It should be noted that there can be multiple second sides 1002. When there are multiple second sides 1002, the second shielding portion 2 is located on at least one second side 1002. These second sides 1002 on which the second shielding portion 2 is arranged can be selected according to the stacking environment and working requirements of the affected body 100.

[0046] For example, the object being disturbed 100 includes a working side 1003 adjacent to the first side 1001. The working side 1003 needs to be arranged to avoid obstruction and does not need to be provided with the second shielding portion 2. For example, when the object being disturbed 100 is a camera, one of the second side 1002 of the camera is used to arrange the lens and cannot be blocked. In this case, the second side 1002 does not need to be provided with the second shielding portion 2.

[0047] In some embodiments, among two adjacent electromagnetic shielding layers 3, the electromagnetic parameter of the electromagnetic shielding layer 3 closer to the interference source 200 is greater than the electromagnetic parameter of the electromagnetic shielding layer 3 farther from the interference source 200.

[0048] With the above arrangement, the electromagnetic parameters of the electromagnetic shielding layer 3 that is closer to the interference source 200 are greater, and the isolation and absorption effect on electromagnetic radiation is better.

[0049] In some embodiments, the ratio of the target value to the electromagnetic parameter of the electromagnetic shielding layer 3 that is far from the interference source 200 in the two adjacent electromagnetic shielding layers 3 is 20%-30%.

[0050] With the above arrangement, the electromagnetic parameters of the electromagnetic shielding layer 3 that is far from the interference source 200 in the two adjacent electromagnetic shielding layers 3 are smaller. The target value can be determined based on the electromagnetic parameters of the electromagnetic shielding layer 3, so that the two adjacent electromagnetic shielding layers 3 have the optimal difference in electromagnetic parameters, which can achieve the maximum attenuation of electromagnetic energy.

[0051] For example, the ratio of the target value to the electromagnetic parameters of the electromagnetic shielding layer 3 is, for example, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, or 30%.

[0052] In some embodiments, the ratio of the target value to the electromagnetic parameter of the electromagnetic shielding layer 3 furthest from the interference source 200 in the two adjacent electromagnetic shielding layers 3 is 25%. When the target value meets the above ratio range, the first shielding portion 1 and the second shielding portion 2 have the best attenuation effect on electromagnetic energy.

[0053] In some embodiments, electromagnetic parameters include at least one of saturation magnetization, relative permeability, and electrical conductivity. Saturation magnetization refers to the maximum magnetization a magnetic material can achieve when magnetized in an applied magnetic field. Higher saturation magnetization indicates better magnetic permeability. Relative permeability, an electrical term, is the ratio of the permeability of a specific medium to the permeability of free space. Magnetic permeability is a physical quantity representing the magnitude of magnetic permeability in a magnetic medium; a higher relative permeability indicates stronger magnetic permeability. Electrical conductivity, a physics concept, also known as conductivity, is a parameter used to describe the ease with which charge flows in a medium. Higher electrical conductivity indicates stronger electrical conductivity.

[0054] In some possible implementations, the electromagnetic parameters include saturation magnetization, relative permeability, and conductivity, and the electromagnetic parameters of two adjacent electromagnetic shielding layers 3 satisfy at least one of the following formulas (1), (2), and (3): (1) (2) (3) In the above formulas (1), (2) and (3), M sn M represents the saturation magnetization of the nth electromagnetic shielding layer 3. sn-1 μ represents the saturation magnetization of the (n-1)th electromagnetic shielding layer 3. in μ represents the relative permeability of the nth electromagnetic shielding layer 3. in-1 σ represents the relative permeability of the (n-1)th electromagnetic shielding layer 3; n σ represents the conductivity of the nth electromagnetic shielding layer 3. n-1 This represents the conductivity of the (n-1)th electromagnetic shielding layer 3. The (n-1)th electromagnetic shielding layer 3 is closer to the interference source, while the nth electromagnetic shielding layer 3 is farther away from the interference source.

[0055] Among them, the electromagnetic parameters of two adjacent electromagnetic shielding layers 3 can satisfy only one of the above formulas (1), (2) and (3), or they can satisfy two formulas, or all three formulas.

[0056] Combination Figure 2 As shown, in some embodiments, the area of ​​the first shielding portion 1 projected onto the plane where the first side surface 1001 is located is greater than or equal to 80% of the area of ​​the first side surface 1001.

[0057] With the above arrangement, when the area of ​​the first shielding part 1 projected onto the plane where the first side 1001 is located is greater than or equal to 80% of the area of ​​the first side 1001, the first shielding part 1 can isolate and absorb the electromagnetic radiation energy transmitted directly from the interference source 200 to the disturbed body 100, thus achieving a better electromagnetic shielding effect.

[0058] Combination Figure 2 As shown, in some embodiments, the interference source 200 includes a third side 2001 close to the object being interfered with 100, the area of ​​the first shielding portion 1 projected onto the plane of the third side 2001 is greater than or equal to 60% of the area of ​​the third side 2001, and the distance between the first shielding portion 1 and the third side 2001 is greater than or equal to 0.1 mm.

[0059] When the area of ​​the orthographic projection of the first shielding part 1 onto the plane where the third side 2001 is located is greater than or equal to 60% of the area of ​​the third side 2001, and the distance between the first shielding part 1 and the third side 2001 is greater than 0.1mm, the first shielding part 1 can isolate and absorb the electromagnetic radiation energy transmitted directly from the interference source 200 to the disturbed body 100, thus achieving a good electromagnetic shielding effect.

[0060] Combination Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, there are multiple second shielding portions 2 and multiple second side surfaces 1002, and different second side surfaces 1002 are provided with different second shielding portions 2.

[0061] With the above arrangement, multiple second shielding parts 2 can be arranged on different second side surfaces 1002 to provide all-round electromagnetic shielding for the disturbed object 100, especially to effectively isolate and absorb low-frequency electromagnetic radiation with strong diffraction ability.

[0062] Among some possible implementations, refer to Figure 1 and Figure 3As shown, the edges of the second shielding portion 2 on different second side surfaces 1002 have a slot structure 5. This slot structure 5 helps to reduce the processing difficulty of the second shielding portion 2 and can provide a channel for external wiring for the object 100. For example, when the object 100 is a camera, the camera's connecting cable can be led out through the slot structure 5.

[0063] Combination Figure 4 As shown, in some embodiments, when the first shielding portion 1 includes at least two electromagnetic shielding layers 3, the first shielding portion 1 also includes a connecting layer 4, which is located between two adjacent electromagnetic shielding layers 3.

[0064] With the above arrangement, the multiple electromagnetic shielding layers 3 in the first shielding part 1 are bonded together by the connecting layer 4, which makes the structure more reliable, easier to process, and also helps to reduce production costs.

[0065] In some possible implementations, the material of the electromagnetic shielding layer 3 includes, but is not limited to, copper, permalloy, amorphous nanocrystals, ferrite, etc. The material of the connecting layer 4 can be a non-insulating adhesive material.

[0066] Combination Figure 4 As shown, when the second shielding part 2 includes at least two electromagnetic shielding layers 3, the second shielding part 2 also includes a connecting layer 4, which is located between two adjacent electromagnetic shielding layers 3.

[0067] With the above arrangement, the multiple electromagnetic shielding layers 3 in the second shielding part 2 are bonded together by the connecting layer 4, which makes the structure more reliable, easier to process, and also helps to reduce production costs.

[0068] Combination Figure 5 and Figure 6 As shown, in some embodiments, each electromagnetic shielding layer 3 includes a magnetic shielding layer 31 and an electronic shielding layer 32; the magnetic shielding layer 31 and the electronic shielding layer 32 are arranged in alternating layers.

[0069] With the above arrangement, each electromagnetic shielding layer 3 has a magnetic shielding sub-layer 31 that shields the magnetic field component in the electromagnetic wave, and an electronic shielding layer 32 that shields the electric field component in the electromagnetic wave. The order of the magnetic shielding sub-layer 31 and the electronic shielding layer 32 in each electromagnetic shielding layer 3 can be that the magnetic shielding sub-layer 31 is closer to the interference source 200, or the electronic shielding layer 32 is closer to the interference source 200.

[0070] In some possible implementations, the relative permeability of the magnetic isolation layer 31 in each electromagnetic shielding layer 3 is greater than or equal to 10, and the saturation magnetization is greater than 5000 Oe; the conductivity of the electron isolation layer 32 is greater than or equal to 1 × 10⁻⁶. 5When the relative permeability of the magnetic shielding layer 31 and the conductivity of the electron shielding layer 32 meet the above requirements, the electromagnetic shielding layer 3 can effectively shield the magnetic field component and the electric field component in the electromagnetic wave.

[0071] Combination Figure 5 and Figure 6 As shown, in some embodiments, among the two magnetic isolation sub-layers 31 located on both sides of the same electronic isolation layer 32, the magnetic permeability parameter of the magnetic isolation sub-layer 31 closer to the interference source 200 is greater than that of the magnetic isolation sub-layer 31 farther from the interference source 200; among the two electronic isolation layers 32 located on both sides of the same magnetic isolation sub-layer 31, the conductivity parameter of the electronic isolation layer 32 closer to the interference source 200 is greater than that of the electronic isolation layer 32 farther from the interference source 200.

[0072] With the above arrangement, in two adjacent electromagnetic shielding layers 3, the magnetic permeability of the magnetic sublayers 31 on both sides of each electron-isolating layer 32 is greater the closer they are to the interference source 200, and the stronger the shielding effect on the magnetic field component of the electromagnetic wave. The conductivity of the electron-isolating layers 32 on both sides of each magnetic sublayer 31 is greater the closer they are to the interference source 200, and the stronger the shielding effect on the electric field component of the electromagnetic wave. Thus, the shielding structure can effectively shield the magnetic field and electric field components of the electromagnetic wave, blocking the magnetic field and electric field at the position furthest from the disturbed object 100, and the overall shielding effect is good.

[0073] In some embodiments, the first shielding portion 1 and / or the second shielding portion 2 are respectively provided with structural sublayers on the side closest to the interference source 200. These structural sublayers have certain magnetic and electrical conductivity properties, but need to be adapted to the stacking environment, such as increasing strength. Exemplarily, these structural sublayers can replace the magnetic isolation sublayer 31 or the electronic isolation layer 32 in the outermost electromagnetic shielding layer 3. Thus, in the direction from the interference source 200 to the affected body 100, the magnetic permeability or electrical conductivity of the outermost magnetic isolation sublayer 31 or electronic isolation layer 32 (after being replaced by the structural sublayer) may not be the highest value among all the magnetic isolation sublayers 31 or electronic isolation layers 32.

[0074] Combination Figure 7 As shown, in some embodiments, among the two magnetic isolation sub-layers 31 located on both sides of the same electronic isolation layer 32, the thickness of the magnetic isolation sub-layer 31 closer to the interference source 200 is greater than the thickness of the magnetic isolation sub-layer 31 farther from the interference source 200; among the two electronic isolation layers 32 located on both sides of the same magnetic isolation sub-layer 31, the thickness of the electronic isolation layer 32 closer to the interference source 200 is greater than the thickness of the electronic isolation layer 32 farther from the interference source 200.

[0075] With the above arrangement, in two adjacent electromagnetic shielding layers 3, the thickness of the magnetic isolation sub-layers 31 on both sides of each electron isolation layer 32 is greater closer to the interference source 200, and the shielding effect on the magnetic field component in the electromagnetic wave is stronger. The thickness of the electron isolation layers 32 on both sides of each magnetic isolation sub-layer 31 is greater closer to the interference source 200, and the shielding effect on the electric field component in the electromagnetic wave is stronger. Thus, the shielding structure can effectively shield the magnetic field and electric field components of the electromagnetic wave, blocking the magnetic field and electric field at the position farthest from the disturbed object 100, and the overall shielding effect is good.

[0076] In some embodiments, the ratio of the conductivity of adjacent electron-isolating layers 32 and magnetic-isolating layers 31 is greater than or equal to 10; thus, the conductivity of adjacent electron-isolating layers 32 and magnetic-isolating layers 31 satisfies the target ratio, and the electric field component can be effectively attenuated when it is transmitted between electron-isolating layers 32 and magnetic-isolating layers 31.

[0077] In some embodiments, the ratio of the relative permeability of adjacent electron-isolating layers 32 and magnetic-isolating sublayers 31 is less than or equal to 10; thereby, the relative permeability of adjacent electron-isolating layers 32 and magnetic-isolating sublayers 31 satisfies the target ratio, and the magnetic field component can be effectively attenuated when it is transmitted between electron-isolating layers 32 and magnetic-isolating sublayers 31.

[0078] In some embodiments, the ratio of the saturation magnetization of adjacent electron-isolating layers 32 and magnetic-isolating sublayers 31 is less than or equal to 10. Thus, the saturation magnetization of adjacent electron-isolating layers 32 and magnetic-isolating sublayers 31 satisfies the target ratio, and the magnetic field component can be effectively attenuated when it is transmitted between the electron-isolating layers 32 and magnetic-isolating sublayers 31.

[0079] On the other hand, combining Figure 8 As shown, this embodiment provides a terminal device, which includes the electromagnetic shielding component of this application.

[0080] The terminal device in this embodiment uses the electromagnetic shielding component of this application and has all the beneficial technical effects of this application.

[0081] In some embodiments, combined with Figure 8 As shown, the terminal device includes a device housing 300 and a motherboard 400. The motherboard 400 is located inside the device housing 300 and is perpendicular to the inner wall of the device housing 300. The interference source 200 and the interference object 100 are located on the motherboard 400, and the interference object 100 is located on the edge of the motherboard 400 near the device housing 300. The first shielding part 1 is located between the interference source 200 and the interference object 100. There are three second shielding parts 2, which are respectively arranged on the left and right sides and the bottom surface of the interference object 100. The top surface of the interference object 100 is the working side 1003. The side of the interference object 100 away from the interference source 200 is connected to the inner wall of the device housing 300.

[0082] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0083] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this application.

[0084] The above description is merely an embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. An electromagnetic shielding assembly, characterized in that, The electromagnetic shielding assembly includes: a first shielding part (1) and a second shielding part (2); The first shielding portion (1) is located on the first side (1001) of the disturbed body (100) near the interference source (200), and the second shielding portion (2) is located on the second side (1002) of the disturbed body (100) adjacent to the first side (1001); At least one of the first shielding portion (1) and the second shielding portion (2) includes at least two electromagnetic shielding layers (3), wherein the electromagnetic parameters of two adjacent electromagnetic shielding layers (3) are different, and the difference in electromagnetic parameters is greater than or equal to the target value.

2. The electromagnetic shielding assembly according to claim 1, characterized in that, In two adjacent electromagnetic shielding layers (3), the electromagnetic parameter of the electromagnetic shielding layer (3) closer to the interference source (200) is greater than that of the electromagnetic shielding layer (3) farther away from the interference source (200).

3. The electromagnetic shielding assembly according to claim 1 or 2, characterized in that, The ratio of the target value to the electromagnetic parameter of the electromagnetic shielding layer (3) that is farther away from the interference source (200) in the two adjacent electromagnetic shielding layers (3) is 20%-30%.

4. The electromagnetic shielding assembly according to claim 3, characterized in that, The ratio of the target value to the electromagnetic parameter of the electromagnetic shielding layer (3) that is farther away from the interference source (200) in the two adjacent electromagnetic shielding layers (3) is 25%.

5. The electromagnetic shielding assembly according to any one of claims 1 to 4, characterized in that, The electromagnetic parameters include at least one of saturation magnetization, relative permeability, and electrical conductivity.

6. The electromagnetic shielding assembly according to claim 1, characterized in that, The area of ​​the first shielding portion (1) projected onto the plane containing the first side surface (1001) is greater than or equal to 80% of the area of ​​the first side surface (1001); And / or, The interference source (200) includes a third side (2001) close to the object being disturbed (100), the area of ​​the first shielding portion (1) projected onto the plane where the third side (2001) is located is greater than or equal to 60% of the area of ​​the third side (2001), and the distance between the first shielding portion (1) and the third side (2001) is greater than or equal to 0.1 mm.

7. The electromagnetic shielding assembly according to any one of claims 1 to 6, characterized in that, There are multiple second shielding portions (2) and multiple second side surfaces (1002), and different second side surfaces (1002) are provided with different second shielding portions (2).

8. The electromagnetic shielding assembly according to claim 1, characterized in that, When the first shielding part (1) includes at least two electromagnetic shielding layers (3), the first shielding part (1) also includes a connecting layer (4), which is located between two adjacent electromagnetic shielding layers (3); And / or, When the second shielding part (2) includes at least two electromagnetic shielding layers (3), the second shielding part (2) also includes a connecting layer (4), which is located between two adjacent electromagnetic shielding layers (3).

9. The electromagnetic shielding assembly according to any one of claims 1 to 8, characterized in that, Each of the electromagnetic shielding layers (3) includes a magnetic shielding layer (31) and an electronic shielding layer (32); The magnetic isolation layer (31) and the electronic isolation layer (32) are arranged in alternating layers.

10. The electromagnetic shielding assembly according to claim 9, characterized in that, In the two magnetic isolation sub-layers (31) located on both sides of the same electronic isolation layer (32), the magnetic permeability parameter of the magnetic isolation sub-layer (31) closer to the interference source (200) is greater than that of the magnetic isolation sub-layer (31) farther away from the interference source (200); In the two electron isolation layers (32) located on both sides of the same magnetic isolation sub-layer (31), the conductivity parameter of the electron isolation layer (32) closer to the interference source (200) is greater than that of the electron isolation layer (32) farther away from the interference source (200).

11. The electromagnetic shielding assembly according to claim 10, characterized in that, In the two magnetic isolation sub-layers (31) located on both sides of the same electronic isolation layer (32), the thickness of the magnetic isolation sub-layer (31) closer to the interference source (200) is greater than the thickness of the magnetic isolation sub-layer (31) farther away from the interference source (200); In the two electron isolation layers (32) located on both sides of the same magnetic isolation sub-layer (31), the thickness of the electron isolation layer (32) closer to the interference source (200) is greater than the thickness of the electron isolation layer (32) farther away from the interference source (200).

12. The electromagnetic shielding assembly according to claim 9, characterized in that, The ratio of the conductivity of adjacent electron-isolating layers (32) and magnetic-isolating layers (31) is greater than or equal to 10; And / or, the ratio of the relative permeability of adjacent electron-isolating layers (32) and magnetic-isolating layers (31) is less than or equal to 10; And / or, the ratio of the saturation magnetization of adjacent electron-isolating layers (32) and magnetic-isolating layers (31) is less than or equal to 10.

13. A terminal device, characterized in that, The terminal device includes the electromagnetic shielding component as described in any one of claims 1 to 12.

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