JP2011258745A - Electromagnetic wave leakage suppression structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress magnetic noise.SOLUTION: In an electromagnetic wave leakage suppression structure, a tape 2 is composed of an adhesion layer 11 adhered to a housing 1, a magnetic material layer 12 provided on a surface of the adhesion layer 11, a conductive layer 13 provided on a surface of the magnetic layer 12, and an insulation layer 14 provided on a surface of the conductive layer 13, which are formed in this order from the bottom layer. An electrical field occurs between the conductive layer 13 and the housing 1 in a direction perpendicular to the conductive layer 13, and the magnetic field component, which occurs in the direction parallel to the conductive layer 13 due to the electrical field, is absorbed by the magnetic material layer 12.

Description

  The present invention relates to an electromagnetic wave leakage suppression structure for suppressing leakage of electromagnetic waves emitted from an electromagnetic wave emission source.

  An electronic device may be provided with a metal casing for confining electromagnetic waves emitted from the electronic device. Such a casing is usually provided with an opening for fitting the casing portion or for heat dissipation or ventilation of the internal environment. In order to suppress leakage of electromagnetic waves from the inside of the housing to the outside or intrusion from the outside to the inside through the opening, the opening may be covered with a sheet having a conductive layer capable of reflecting the electromagnetic wave. For example, Patent Document 1 discloses a strip-shaped dielectric, a conductive electromagnetic wave reflection layer provided so as to cover both sides of the dielectric and one of the end faces extending in the longitudinal direction therebetween, and An electromagnetic wave attenuating sheet having an adhesive layer provided on an electromagnetic wave reflection layer is disclosed.

JP 2010-045154 A

  Thus, it is known to use a conductive member to shield or suppress electromagnetic waves passing through the opening. However, when the opening of the housing is covered with a conductive member, the conductive member faces the housing around the opening. And since the adhesion layer for adhering a conductive member to a housing | casing adheres to a normal electroconductive member, the gap | interval for the thickness of an adhesion layer arises between a conductive member and a housing | casing. It will be. Then, the difference in potential between the conductive member and the housing causes a capacitor to appear in this gap.

  The capacitor works such that an electric field is generated in a vertical direction from one of plate plates with different potentials facing each other and an electric field is input in a vertical direction on the other, and a magnetic field is generated in a direction perpendicular to the electric field. And this magnetic field became a magnetic noise to the exterior and inside of a housing | casing, and there existed a problem that radiation | emission and penetration | invasion of electromagnetic waves were promoted. In the case of alternating current, since the poles are inverted, the direction of the electric field and the magnetic field generated in the direction perpendicular thereto is also changed, and the passage of the magnetic field is promoted. Note that the capacitor capacity increases as the gap between the bipolar plates becomes smaller. Therefore, no matter how small the gap is pasted on the housing, the pasted part becomes an active capacitor, and the electric field and the direction perpendicular thereto The passage and leakage of the magnetic field generated in the are allowed.

  Further, when the conductive member has a potential different from that of the housing, the conductive member may function as an antenna, and there is a problem that the conductive member becomes a source of electromagnetic wave transmission or reception. This is because a conductive member (such as a metal foil tape having an adhesive layer) generally used as an electromagnetic leakage countermeasure product is not subjected to a process of making the casing and the conductive member have the same potential, resulting in a capacitor configuration. This is because the countermeasures against electromagnetic wave leakage after this are not taken.

  Patent Document 1 discloses a technique for suppressing electromagnetic waves leaking from a very small gap generated between a case and a cover using an electromagnetic wave reflection layer and a conductive adhesive. This is a technique for making the case and the cover have the same potential, and is intended to suppress reflection of the electric field component of the electromagnetic wave by the conductive member. In this case, since the gap cannot be completely filled even if the electromagnetic wave reflection layer and the conductive adhesive are used, for example, when low frequency electromagnetic noise (magnetic wave) is generated in the housing, the magnetic wave (magnetic noise) is , Leak easily through the gap. Thus, there was no electromagnetic wave suppression means for suppressing not only high frequency noise but also magnetic field waves (magnetic noise).

  A main object of the present invention is to provide an electromagnetic wave leakage suppression structure capable of suppressing magnetic noise.

  The electromagnetic wave leakage suppression structure of the present invention includes a conductive member for suppressing electromagnetic waves emitted from an electromagnetic wave emission source disposed on one side from leaking to the other side, and the conductive member from the one side to the other side. And a laminated body bonded to the conductive member so as to cover at least a part of the opening, and the laminated body includes a conductive layer made of metal and one of the conductive layers. It includes a magnetic layer provided on the surface or both surfaces, and an adhesive layer attached to the conductive member or the magnetic layer provided on the surface of the magnetic layer.

  According to the above configuration, since the electromagnetic wave that is emitted from the electromagnetic wave emission source and tries to pass through an opening such as a vent or a heat radiation hole is reflected by the conductive layer, the electromagnetic wave is reflected from the one side of the conductive member to the other through the opening. Leaking to the side can be suppressed. In addition, a magnetic field is generated between the conductive layer and the conductive member in a direction parallel to the conductive layer by an electric field perpendicular to the conductive layer. Since the magnetic layer is provided in the region where the magnetic field is generated, the generated magnetic field component can be absorbed by the magnetic layer. Therefore, magnetic noise to one side and the other side of the conductive member can be suppressed.

  That is, the present invention actively creates a capacitor configuration by sticking a conductive layer around the opening and the periphery of the opening to narrow down the electromagnetic wave, and arranges a magnetic sheet in the capacitor portion to more effectively suppress the passage of the electromagnetic wave. Is. That is, by sticking the conductive layer to the opening, the path of the electromagnetic wave is limited to the interval (gap) between the conductive layer and the periphery of the opening, and the electromagnetic wave can be concentrated. When concentrating, the electromagnetic waves flying through the space with repeated directionality by repeating reflections, etc. are passed through a fixed interval (gap) in the electric field direction, so that it is perpendicular to the electric field direction, that is, conductive The orientation can be aligned so that the magnetic field is directed in a direction substantially parallel to the layers and the housing.

  In addition, a magnetic layer is laminated on the conductive layer of the present invention, and the above magnetic field can be reduced energetically by thermal conversion due to the magnetic properties of the magnetic layer. The dielectric properties and resistance properties of the magnetic layer also contribute to energy reduction.

  Although the configuration of the magnetic layer will be described later, the magnetic layer may have a configuration in which scaly magnetic metal powder is dispersed in a polymer or the like and oriented and arranged in the sheet surface direction. That is, the magnetic properties have directionality according to the shape of the magnetic metal powder dispersed in the sheet. The magnetic properties in the sheet surface direction are higher than those in the direction perpendicular to the sheet surface, and the real part (μ ′) of the complex relative permeability and the imaginary part (μ ″) of the complex relative permeability are also increased. This directionality of the magnetic layer is mainly utilized, and there has been no precedent considering such directionality, and the electromagnetic wave leakage can be effectively suppressed by using the laminated body.

  The laminated body preferably has an area larger than that of the opening when viewed from a direction orthogonal to the opening. According to this configuration, the laminate can cover the opening completely by having an area larger than the opening as viewed from the direction orthogonal to the opening. Therefore, leakage of electromagnetic waves through the opening can be more reliably suppressed.

  The laminate may be bendable at a bending angle of 180 °. According to this configuration, the laminate can be bent up to a bending angle of 180 °, so that, for example, even when the conductive member portion where the opening is formed is not flat, the laminate is bent to cover the opening. be able to.

  The conductive layer may be made of a magnetic metal. According to this structure, especially a low frequency magnetic noise can be more reliably suppressed by comprising a conductive layer from a magnetic metal. Therefore, for example, it can be effectively used for MRI or the like.

  The conductive layer may be made of nonmagnetic or weak magnetic metal. According to this configuration, when the conductive layer is made of nonmagnetic or weak magnetic metal, for example, when a magnetic field is present in the surroundings, it is difficult to be affected by the magnetic field component.

  It is preferable that the laminated body further includes an insulating layer provided on the side opposite to the adhesive layer with respect to the conductive layer. According to this configuration, since the insulating layer is provided, for example, when there is a circuit or an antenna nearby, it can be used without conduction.

  The electromagnetic wave leakage suppression structure of the present invention includes a plurality of the laminated bodies, and each of the plurality of laminated bodies has a portion overlapping with at least one other laminated body in a direction orthogonal to the opening. Also good.

  According to said structure, each of several laminated body has a part which overlaps with at least 1 other laminated body regarding the direction orthogonal to opening, and a several conductive layer is overlapped partially. Therefore, leakage of electromagnetic waves through the opening can be more reliably suppressed.

  It is preferable that the plurality of stacked bodies have an area larger than the opening as viewed from a direction orthogonal to the opening. According to this configuration, when the plurality of stacked bodies have an area larger than the opening as viewed from the direction orthogonal to the openings, the plurality of stacked bodies can completely cover the openings. Therefore, leakage of electromagnetic waves through the opening can be more reliably suppressed.

It is a perspective view which shows the electromagnetic wave leakage suppression structure which concerns on one Embodiment of this invention. FIG. 2 is a plan view of the structure shown in FIG. 1. FIG. 3 is a sectional view taken along line III-III shown in FIG. 2. It is a figure for demonstrating the magnetic field which originates in the conductive layer of the tape shown by FIGS. It is a figure showing the material constant measurement result of the magnetic body layer of this invention. It is a figure which shows the electric field and magnetic field shielding property with respect to the electromagnetic wave of 100 KHz in the Example and comparative example of this invention. It is a figure which shows the electric field and magnetic field shielding property with respect to 1 MHz electromagnetic wave in the Example and comparative example of this invention. It is a figure which shows the electric field and magnetic field shielding property with respect to the electromagnetic wave of 10 MHz in the Example and comparative example of this invention. It is a figure which shows the electric field and magnetic field shielding property with respect to the electromagnetic wave of 100 MHz in the Example and comparative example of this invention. It is a figure which shows the electric field and magnetic field shielding property with respect to the electromagnetic wave of 1 GHz in the Example and comparative example of this invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a housing 1. The housing 1 has conductivity, and suppresses leakage of electromagnetic waves emitted from an electronic device (not shown) housed inside the housing 1 to the outside of the housing 1.

  As shown in FIGS. 2 and 3, the casing 1 is provided with minute ventilation holes 3 penetrating the casing 1 in the thickness direction. The vent hole 3 is for communicating the inside and the outside of the housing 1 and venting the outside air and the air in the housing 1.

  An electromagnetic wave leakage suppression tape 2 (laminate) is bonded to the housing 1 so as to cover the vent hole 3. As can be seen from FIG. 2, the tape 2 has an area larger than that of the air holes 3 when viewed from the direction perpendicular to the paper surface of FIG. 2, that is, from the direction perpendicular to the air holes 3. In other words, the tape 2 completely covers the vent hole 3. The tape 2 is obtained by cutting a roll-shaped product and can be bent at a bending angle of 180 °. That is, the size of the tape 2 can be appropriately changed depending on the size of the vent hole 3 and the like.

  As shown in FIG. 3, the tape 2 is provided on the surface of the magnetic layer 12, the adhesive layer 11 that is bonded to the housing 1, the magnetic layer 12 that is provided on the surface of the adhesive layer 11, and the lowermost layer. The conductive layer 13 and the insulating layer 14 provided on the surface of the conductive layer 13 are configured.

  In order to realize the electromagnetic wave leakage suppressing structure, it is necessary to laminate the magnetic layer 12 and the adhesive layer 11 in addition to the conductive layer 13. This is the case where the conductive layer 13 faces the conductive casing 1. The laminated body has a portion that does not partially face the housing 1 (a portion that faces the opening), and the magnetic layer 12 and the adhesive layer 11 may not be disposed in such a portion, and the conductive layer 13 The electromagnetic wave leakage suppressing property can be realized only with this. That is, the conductive layer 13, the magnetic layer 12, and the adhesive layer 11 are indispensable for the tape 2 that is a laminate, but the three layers are disposed between the conductor layer 13 and the conductive casing 1. The magnetic layer 12 and / or the adhesive layer 11 may not be included in any other place.

  The adhesive layer 11 may be composed of anything as long as it can adhere to the housing 1. The magnetic layer 12 is obtained by blending and dispersing a magnetic metal powder in a rubber-like sheet and has magnetism. That is, the magnetic layer 12 has magnetic permeability. The magnetic permeability of the magnetic layer 12 is preferably selected as appropriate according to the frequency of the electromagnetic wave from the electromagnetic wave generation source (electronic device in the present embodiment), the surrounding environment, and the like. When the magnetic layer 12 has an adhesive or sticky function, it can also serve as the adhesive layer 11. In this case, the laminate is mainly composed of the conductive layer 13 and the magnetic layer 12, but the function of the adhesive layer 11 also exists. The adhesive layer 11 may have conductivity.

  The conductive layer 13 is made of metal, and can reflect electromagnetic waves that are emitted from the electronic device and are about to pass through the vent hole 3. The metal of the conductive layer 13 is preferably selected as appropriate depending on the frequency of the electromagnetic wave from the electromagnetic wave generation source, the surrounding environment, and the like. For example, when the conductive layer 13 is made of a magnetic metal, there is an advantage that low frequency (about 100 kHz) electromagnetic waves can be more reliably reflected. Further, when the conductive layer 13 is made of a non-magnetic / weakly magnetic metal, for example, when a magnetic field exists around it, it can be made less susceptible to the influence of the magnetic field component. Examples of magnetic metals include iron, and examples of non-magnetic or weak magnetic metals include aluminum and copper. However, the metal of the conductive layer 13 is not limited to these.

  The insulating layer 14 plays a role of preventing electrical conduction with the conductive layer 13 when there is a conductive member such as a circuit or an antenna around the casing 1.

  As shown in FIG. 4, when such a tape 2 is attached to the casing 1, an electric field may be generated between the conductive layer 13 and the casing 1 in a direction perpendicular to the conductive layer 13. As indicated by a broken line in FIG. 4, this electric field generates a magnetic field in a direction parallel to the conductive layer 13. However, since the magnetic layer 12 is provided in this region where the magnetic field is generated, the generated magnetic field component is absorbed by the magnetic layer 12. Therefore, magnetic noise to the inside and outside of the housing 1 can be suppressed.

  The laminate of the present invention has a magnetic layer 12 mainly composed of soft magnetic powder and a binder, and is used mainly in a tape form (EMC tape) together with the conductive layer 13 and the adhesive layer 11. The The magnetic layer 12 of the present invention is mainly composed of a binder and a filler. The filler referred to here is a general term for all components other than a binder such as a soft magnetic powder, a crosslinking agent, a dispersant, a flame retardant, a flame retardant aid, and a plasticizer.

  Examples of the soft magnetic powder include magnetic stainless steel (Fe—Cr—Al—Si alloy), sendust (Fe—Si—Al alloy), permalloy (Fe—Ni alloy), silicon copper (Fe—Cu—Si alloy), Fe-Si alloys, Fe-Si-B (-Cu-Nb) alloys, Fe-Ni-Cr-Si alloys, Fe-Si-Cr alloys, Fe-Si-Al-Ni-Cr alloys, etc. All are listed. Further, ferrite or pure iron particles may be used. Amorphous alloys (Co-based, Fe-based, Ni-based, etc.), non-amorphous alloys (Co-based, Fe-based, Ni-based, etc.), electromagnetic soft iron, and Fe-Al based alloys can also be used. They may be oxides or may have an oxide structure in part. Examples of the ferrite include soft ferrite such as Mn—Zn ferrite, Ni—Zn ferrite, Mn—Mg ferrite, Mn ferrite, Cu—Zn ferrite, and Cu—Mg—Zn ferrite, or hard ferrite that is a permanent magnet material. . Examples of iron-based oxides include magnetite. As the Co-based oxide (Co-Zr-O-based, Co-Pb-Al-O-based, or the like), a granular film can be used. Examples of Fe pure iron particles include carbonyl iron powder. The soft magnetic powder is not limited by its shape (spherical, flat, fibrous, etc.), but is preferably a flat soft magnetic powder with high magnetic permeability. However, in the flat shape, air (solvent) inside the magnetic body is less likely to escape, and the specific gravity after drying tends not to increase. These magnetic materials may be used alone or in combination. The average particle diameter of the soft magnetic powder or the long diameter of the flat soft magnetic powder is 1 to 300 μm, preferably 20 to 100 μm. The aspect ratio of the flat soft magnetic powder is 2 to 500, preferably 10 to 100. The average particle size is a value obtained by measuring with a particle size distribution measuring device.

  As the binder of the present invention, an elastomer or a resin can be used. Examples of the elastomer include a chlorinated polyethylene, a chlorine type such as vinyl chloride, a polystyrene type such as an SBS type polymer, and a polyolefin type such as EPDM. , Various elastomers (including thermoplastic elastomers) such as polyurethane, polyester, polyamide, fluorine, and silicone. Any rubber material can be used regardless of the type.

  Examples of the resin include polyester urethane resin (adipate, carbonate, caprolactam ester, etc.), polyether urethane resin, polyvinyl acetal resin, polyethylene, polypropylene, AS resin, ABS resin, polystyrene, polyvinyl chloride, poly Vinylidene chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, fluorine resin, acrylic resin, methacrylic ester resin, synthetic resin copolymerized with acrylic acid monomer and other monomers, nylon, polycarbonate, polyethylene terephthalate, polyethylene Phthalate, polybutylene terephthalate, polybutadiene resin, alkyd resin, unsaturated polyester, polysulfone, polyurethane resin (all other than those described above except polyester and polyether) Type), urea resin, imide resin, phenol resin, urea resin, epoxy resin, silicone resin, melamine resin, acrylic resin, acrylic copolymer system, alkyl acrylic resin, ionomer resin, biodegradable resin, recycled resin, etc. These thermoplastic resins or thermosetting resins can be mentioned. These elastomers or resins may be used alone, or may be used after modification (grafting, copolymerization, chemical treatment, etc.), or in a composite system (blend, polymer alloy, composite, etc.) It can also be used. It can also be blended in paints such as acrylic silicone, acrylic urethane, acrylic lacquer, various primers, fluorine-based paint, silicone-based paint, and UV paint. These elastomers and resins have a functional group (such as a polar group such as a glycidyl group, a carboxyl group, a sulfonic acid group, a maleic acid group, an amino group, etc., for example, a metal salt or a quaternary amine to improve cohesion. A polar group capable of forming an ionomer). It can also be crosslinked.

Hereinafter, examples and comparative examples will be described.
<Preparation of magnetic layer and laminate>
Add a binder (chlorinated polyethylene) and other fillers (flame retardant, cross-linking agent), and a solvent so that the content of the soft magnetic metal powder (Sendust powder) in the sheet of the magnetic layer is 40% by volume, and add a solvent. A paint was prepared, and coating and drying were performed on PET (polyethylene terephthalate, release support) by a doctor blade method, and sheet molding (roll shape) was performed. Subsequently, the peeling support was peeled off to obtain a magnetic layer 12 having a thickness of 100 μm. When producing a laminated body, the metal layer (Al, Cu, Fe) which is the conductive layer 13 is used in place of the peeling support, and the magnetic layer 12 is directly applied on the metal foil. To obtain a tape-shaped test piece (laminate). Further, an adhesive layer (adhesive layer 11) is further laminated. Example 1 is Al foil (10 μm thickness) / magnetic material (100 μm thickness) / adhesion layer (30 μm thickness), Example 2 is Cu foil (35 μm thickness) / magnetic material (100 μm thickness) / adhesion layer (30 μm thickness), Example 3 is Fe foil (50 μm thickness) / magnetic body (100 μm thickness) / adhesion layer (30 μm thickness), and Example 4 is Fe foil (100 μm thickness) / magnetic body (100 μm thickness) / adhesion layer (30 μm thickness). is there. An insulating layer 14 is provided on the metal foil. The obtained magnetic layer 12 was measured for material constants (μ ′, μ ″, ε ′, ε ″), and further measured for electric field and magnetic field shielding properties. The said measurement was performed at room temperature 25 degreeC.

<Evaluation method of material constant>
The material constants of the magnetic layer 12 are the real part μ ′ and the imaginary part μ ″ of the complex relative permeability, and the real part ε ′ and the imaginary part ε ″ of the complex relative permittivity. The measurement was carried out by ring processing (φ7 × φ3) of the material and the coaxial tube method. The result is shown in FIG. The equipment used is a material analyzer (E4991A manufactured by Agilent) for frequencies from 1 MHz to 1.8 GHz.

<Evaluation method for electric field and magnetic field shielding properties>
Electric field and magnetic field shielding properties are measured by the shield evaluation method of the KEC method. Measurement is continuously performed for electromagnetic waves having frequencies including 100 KHz, 1 MHz, 10 MHz, 100 MHz, and 1 GHz. As a representative, data measured for these six frequencies are shown in Table 1 and FIGS. Yes. In the measurement, the comparative example 1 is an Al foil (10 μm thickness), the comparative example 2 is a Cu foil (35 μm thickness), the comparative example 3 is an Fe foil (50 μm thickness), and the comparative example 4 is an Fe foil (100 μm thickness). Comparative Example 5 uses only the magnetic layer 12 of the present invention. In general, Fe, which is a magnetic metal, is particularly excellent in magnetic shielding against low frequency electromagnetic waves. However, in an environment where there is a magnetic field outside, it is easily affected by being magnetized or attracted. On the other hand, even if Al and Cu are inferior in magnetic shielding properties, they are less affected by an external magnetic field and have excellent workability.

  Measurement by the KEC method is known, but in a measurement jig having a hole through which electromagnetic waves pass, the sample is attached to the measurement jig so that the sample and the measurement jig overlap each other around the hole. . At that time, as described in the present invention, the magnetic layer 12 is disposed in the capacitor portion sandwiched between the conductors of the metal foil (conductive layer 13) and the jig (for example, the case 1), thereby providing a magnetic field shield. It can be seen that the performance is improved. The electric field shield depends on the presence of a metal, and is hardly affected by the type and thickness of the metal. On the other hand, the magnetic field shielding property is higher in the example than in the comparative example. Especially for low frequency regions such as 100 KHz, 1 MHz and 10 MHz, the magnetic field shielding property of the embodiment is clearly high, and the magnetic field shielding property of the magnetic layer 12 is simply made to be the magnetic field shielding property of the metal foil (conductive layer 13). Some are higher than the added value. From the above, it can be seen that the configuration of the present invention is effective in shielding or suppressing low-frequency magnetic noise.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  In the above-described embodiment, the structure in which the tape 2 covers the vent hole 3 provided in the housing 1 is shown. However, the tape 2 can be applied not only to the vent hole 3 but also to any opening. Further, for example, the effect can be obtained even if the tape 2 is applied so as to cover the boundary between two adjacent metal plates. Further, the tape 2 may be affixed not only in the vicinity of the vent hole 3 but also over the entire housing 1.

  In the embodiment described above, the tape 2 completely covers the vent hole 3, but may cover only a part of the vent hole 3. However, from the viewpoint of suppressing electromagnetic wave leakage, it is preferable that the tape 2 completely covers the vent hole 3. In the above-described embodiment, the single tape 2 covers the vent hole 3, but the vent hole 3 may be covered with a plurality of tapes. In that case, it is preferable that the plurality of tapes completely cover the vent hole 3. Further, it is preferable that the plurality of tapes have a portion overlapping with at least one other tape in the direction orthogonal to the vent hole 3.

  In the above-described embodiment, the tape 2 is obtained by cutting a roll-shaped product and can be bent at a bending angle of 180 °. However, the member that covers the vent hole 3 is not limited to this. That is, the member may not be a tape, and may not be bendable.

  In the above-described embodiment, as an example, it has been described that the conductive layer 13 may be made of a magnetic metal or a non-magnetic / weak magnetic metal. However, the conductive layer 13 may be a conductive layer that can reflect electromagnetic waves. It may be composed of anything.

1 Housing 2 Tape (laminate)
3 Vent 11 Adhesive layer 12 Magnetic layer 13 Conductive layer 14 Insulating layer

Claims (8)

A conductive member for suppressing electromagnetic waves emitted from an electromagnetic wave emission source disposed on one side from leaking to the other side;
An opening penetrating the conductive member from the one side to the other side;
A laminate bonded to the conductive member so as to cover at least a part of the opening,
The laminate includes a conductive layer made of a metal, a magnetic layer provided on one surface of the conductive layer, or both surfaces, and a conductive member provided on the surface of the magnetic layer, or An electromagnetic wave leakage suppression structure comprising an adhesive layer bonded to a magnetic layer.   2. The electromagnetic wave leakage suppression structure according to claim 1, wherein the laminated body has an area larger than the opening as viewed from a direction orthogonal to the opening.   The electromagnetic wave leakage suppressing structure according to claim 1, wherein the laminate can be bent at a bending angle of 180 °.   The electromagnetic wave leakage suppressing structure according to claim 1, wherein the conductive layer is made of a magnetic metal.   The electromagnetic wave leakage suppression structure according to claim 1, wherein the conductive layer is made of a nonmagnetic or weak magnetic metal.   6. The electromagnetic wave leakage suppression structure according to claim 1, wherein the laminated body further includes an insulating layer provided on a side opposite to the adhesive layer with respect to the conductive layer. . A plurality of the laminates,
The electromagnetic wave leakage suppression structure according to claim 1, wherein each of the plurality of stacked bodies has a portion that overlaps at least one other stacked body in a direction orthogonal to the opening. .   8. The electromagnetic wave leakage suppression structure according to claim 7, wherein the plurality of stacked bodies have an area larger than the opening when viewed from a direction orthogonal to the opening.

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