WO2018084591A1 - Feuille de protection contre les ondes électromagnétiques pour boîtier de protection - Google Patents

Feuille de protection contre les ondes électromagnétiques pour boîtier de protection Download PDF

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Publication number
WO2018084591A1
WO2018084591A1 PCT/KR2017/012316 KR2017012316W WO2018084591A1 WO 2018084591 A1 WO2018084591 A1 WO 2018084591A1 KR 2017012316 W KR2017012316 W KR 2017012316W WO 2018084591 A1 WO2018084591 A1 WO 2018084591A1
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WO
WIPO (PCT)
Prior art keywords
shield
conductive
conductive sheet
sheet
pressure applying
Prior art date
Application number
PCT/KR2017/012316
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English (en)
Korean (ko)
Inventor
서인용
Original Assignee
주식회사 아모그린텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170058086A external-priority patent/KR20180048250A/ko
Priority claimed from KR1020170119473A external-priority patent/KR101928826B1/ko
Application filed by 주식회사 아모그린텍 filed Critical 주식회사 아모그린텍
Priority to US16/346,813 priority Critical patent/US10653047B2/en
Priority to CN201780067023.6A priority patent/CN109892031B/zh
Publication of WO2018084591A1 publication Critical patent/WO2018084591A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present invention relates to an electromagnetic shielding sheet for a shield can.
  • Modern electronic devices include various devices, most of which are mounted on a printed circuit board. Since these devices are sensitive to electromagnetic interference (EMI) generated by internal or external interference sources of electronic devices, electromagnetic waves may cause malfunction of the electronic devices.
  • EMI electromagnetic interference
  • Electromagnetic waves are a phenomenon in which energy moves in the form of a sine wave as an electric field and a magnetic field interoperate with each other. Such electromagnetic waves are useful in electronic devices such as wireless communication and radar, but not only cause malfunctions of electronic and communication devices but also harmful effects on the human body.
  • Electric fields are generated by voltage and are easily shielded by distances or obstacles such as trees.
  • Magnetic fields have the property of being generated by current and inversely proportional to distance, but not easily shielded. Accordingly, electronic devices cover electronic components such as devices mounted on a printed circuit board with a shield can made of metal to block EMI generated from an interference source. This prevents the electronics from malfunctioning itself and prevents them from affecting the operation of other nearby electronics.
  • Such a shield can is typically manufactured by separating the upper and lower open sidewalls and the upper plate, and adopts a method of assembling the upper plate on the upper side of the sidewall in the process of mounting the printed circuit board.
  • the top plate needs to have a thick enough thickness to fill all the space between the shield can and the metal bracket.
  • the vertical resistance is increased, rather the EMI shielding performance is lowered.
  • the present invention has been made in view of the above, and an object thereof is to provide an electromagnetic shielding sheet for a shield can that can compensate for a thickness tolerance and can easily change the overall thickness to a required level.
  • another object of the present invention is to provide an electromagnetic shielding sheet for a shield can, in which the conductive sheet can be kept in close contact with the shield can.
  • Another object of the present invention is to provide an electromagnetic shielding sheet for a shield can that can reduce electrical resistance and improve electrical conductivity.
  • the present invention is disposed between the shield can and the metal bracket in order to shield the electromagnetic waves generated in the circuit device, the first conductive sheet having an electrical conductivity and on both sides of the first conductive sheet A first conductive sheet portion including an intervening conductive adhesive member; A pressure applying member disposed on one surface of the first conductive sheet portion and capable of compression by an external force; And a second conductive sheet having electrical conductivity and disposed on one surface of the first conductive sheet portion to cover at least one surface of the pressure applying member, wherein the second conductive sheet portion is electrically connected to the first conductive sheet portion.
  • an electromagnetic shielding sheet for a shield can is provided.
  • At least one of the first conductive sheet and the second conductive sheet may be a conductive fibrous web in which a fiber coated with a conductive material on an outer surface is formed in a three-dimensional network structure.
  • the first conductive sheet may be a conductive fibrous web in which a fiber coated with a conductive material on an outer surface is formed in a three-dimensional network structure
  • the second conductive sheet may be a metal sheet.
  • both the first conductive sheet and the second conductive sheet may be conductive fibrous webs in which a fiber coated with a conductive material on an outer surface thereof has a three-dimensional network structure.
  • the pressure applying member may be an elastic member having non-conductivity.
  • the elastic member may be a fibrous web or a sponge.
  • the second conductive sheet may include a first portion laminated on one surface of the pressure applying member, and a second portion laminated on one surface of the first conductive sheet, wherein the first portion The part and the second part may be formed in a stepped surface.
  • the distance between the first portion and the first conductive sheet may have a length longer than the distance between the second portion and the first conductive sheet, and the second portion surrounds the edge of the first portion. It may be formed so as to cover the edge of the first conductive sheet.
  • the first conductive sheet may include a first portion laminated on one surface of the pressure applying member and a second portion laminated on one surface of the second conductive sheet.
  • the first portion and the second portion may be formed in a stepped surface.
  • the distance between the first portion and the second conductive sheet may have a length longer than the distance between the second portion and the second conductive sheet.
  • an adhesive member may be interposed on the opposite surface of the first portion and the pressure applying member.
  • a ring-shaped step compensation member may be disposed on one surface of the second part to compensate for the step with the first part.
  • the second portion may be formed to be located inside the first portion.
  • the pressure applying member may include a through portion formed to surround the edge of the second portion.
  • the shielding electromagnetic shield sheet for the shield can may be formed with at least one opening having a predetermined area in a region corresponding to the circuit element disposed inside the shield can.
  • the opening may be formed in the first portion, and the opening may be formed to simultaneously pass through the pressure applying member and the second conductive sheet portion.
  • the opening may be formed in the second portion, and the opening may be formed to simultaneously pass through the second conductive sheet portion.
  • the shield shield electromagnetic shield sheet when the shield shield electromagnetic shield sheet is interposed between the shield can and the metal bracket, the shield shield electromagnetic shield sheet may be pressed to a thickness of 1/5 ⁇ 3/10 with respect to the initial thickness.
  • the overall thickness when the external force is generated, the overall thickness can be compressed by a predetermined ratio through the compression of the pressure applying member, thereby compensating the thickness tolerance and easily changing the overall thickness to the required level while maintaining the EMI shielding performance.
  • the conductive sheet attached to the shield can and the adhesive member may have flexibility to maintain a state in which the shield sheet can be completely in contact with the shield can, thereby increasing the electromagnetic shielding efficiency.
  • the conductive path between the conductive sheet portions can be formed at the shortest distance through the stepped surface, thereby reducing the vertical resistance and improving the electrical conductivity.
  • FIG. 1 is a schematic view showing a shield sheet for shield cans according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view along the A-A direction of FIG.
  • FIG. 3 is a cross-sectional view taken along the line B-B of FIG.
  • FIG. 4 is a view showing a case in which the second conductive sheet is formed of a conductive fibrous web in FIG.
  • FIG. 5 is a view showing a state in which the step compensation member is applied to FIG.
  • FIG. 6 is a view showing a state where a metal sheet is applied to the form of FIG.
  • FIG. 7 is a view showing a state in which a metal sheet is applied to FIG.
  • FIG. 8 is a cross-sectional view of a shield can shielding sheet according to an embodiment of the present invention in the same direction as the direction B-B of FIG.
  • FIG. 9 is a schematic view showing a shield sheet for a shield can according to another embodiment of the present invention.
  • FIG. 10 is a cross-sectional view taken along the C-C direction of FIG.
  • FIG. 11 is a sectional view taken along the line D-D of FIG. 9;
  • FIG. 12 is a view showing a case in which the second conductive sheet is formed of a conductive fibrous web in FIG.
  • FIG. 13 is a view illustrating a state in which a step compensation member is applied to FIG. 11;
  • FIG. 14 is a view showing a state in which a metal sheet is applied to FIG.
  • FIG. 15 is a view illustrating a metal sheet applied to FIG. 13;
  • FIG. 16 is a cross-sectional view of the shield can shielding sheet according to another embodiment of the present invention in the same direction as the D-D direction of FIG.
  • FIG. 17 is a schematic view showing a shield sheet for a shield can according to another embodiment of the present invention.
  • FIG. 19 is a sectional view along the F-F direction in FIG. 17,
  • FIG. 20 is a view showing a case in which the second conductive sheet is formed of a conductive fibrous web in FIG. 19,
  • FIG. 21 is a view illustrating a state in which a conductive fibrous web layer is applied between the first conductive sheet part and the second conductive sheet part in FIG. 19.
  • FIG. 21 is a view illustrating a state in which a conductive fibrous web layer is applied between the first conductive sheet part and the second conductive sheet part in FIG. 19.
  • FIG. 22 is a view showing another form of the opening in FIG. 21,
  • FIG. 23 is a cross-sectional view of the shield can shielding sheet according to another embodiment of the present invention in the same direction as the F-F direction of Figure 17, and
  • FIG. 24 is a cross-sectional view showing the detailed configuration of the conductive fibrous web that can be applied to the present invention.
  • Shield shield electromagnetic shield sheet (100, 200, 300) according to an embodiment of the present invention can shield the electromagnetic wave generated in the circuit element 12 together with the shield can 20, as shown in Figure 8, 16 and 23. have.
  • the shield can electromagnetic shield sheet (100, 200, 300) may be disposed on the open upper side of the shield can 20, the circuit element 12 together with the shield can 20 It can block external leakage of electromagnetic waves.
  • the shield can 20 may be disposed to surround the circuit device 12 mounted on the circuit board 10.
  • the shield can 20 may be made of a metal material to shield the electromagnetic waves generated from the circuit element 12, and may be hollow in the upper and lower portions thereof.
  • the circuit device 12 may be an electronic component such as an AP for controlling the overall driving of the electronic device, but is not limited thereto.
  • the circuit device 12 may be mounted on the circuit board 10, and electromagnetic waves are generated during operation, and the shield It can be any known electronic component that can be surrounded by the can 20.
  • Shield shield electromagnetic shield sheet (100, 200, 300) according to an embodiment of the present invention, as shown in Figures 1 to 23, the first conductive sheet portion (110,210), the pressure applying member (130,230) and the second conductive sheet portion ( 120,220).
  • One surface of the first conductive sheet parts 110 and 210 may be attached to an upper side of the shield can 20, and may shield electromagnetic waves generated from the circuit device 12.
  • the first conductive sheet portions 110 and 210 may include plate-shaped first conductive sheets 111 and 211 having electrical conductivity to shield electromagnetic waves, and may be provided on both sides of the first conductive sheets 111 and 211.
  • a pair of conductive adhesive members 112 and 113 may be disposed, respectively.
  • the first conductive sheet portions 110 and 210 may be attached to the upper portion of the shield can 20 through the conductive adhesive member 112 disposed on the lower surfaces of the first conductive sheets 111 and 211. It may be attached to the second conductive sheet portion 120, 220 or the pressure applying member (130, 230) through the conductive adhesive member 113 disposed on the upper surface of the first conductive sheet (111,211).
  • the first conductive sheets 111 and 211 may be conductive fibrous webs M formed in a three-dimensional network structure as shown in FIGS. 2, 10, and 18.
  • the conductive fibrous web M may have a form in which the conductive material M2 is coated on the outer surface of the fiber M1 as shown in FIG. 24.
  • the first conductive sheets 111 and 211 may be deformed to have a fine curvature and thus the surface of the shield can 20. You can always stay interviewed. As a result, the electromagnetic wave generated in the circuit device 12 may be blocked or minimized to prevent leakage of the electromagnetic wave through the interface between the first conductive sheet parts 110 and 210 and the shield can 20. Can be.
  • the shield shield electromagnetic shield sheet (100, 200, 300) is interposed between the shield can 20 and the metal bracket 30 is compressed by an external force when the conductive material (M2)
  • the spacing between these coated fibers M1 can be narrowed. Accordingly, the gap between the conductive materials M2 is narrowed so that the vertical resistance is greatly reduced, and thus the electromagnetic shielding performance can be further increased through the increase in the electrical conductivity.
  • the fiber (M1) forming the conductive fibrous web (M) can be used without limitation in the case of a material that can be produced and maintained in a conventional fiber form.
  • the fiber (M1) is a polyurethane (polyurethane), polystyrene (polystylene), polyvinylalchol (polyvinylalchol), polymethyl methacrylate (polymethyl methacrylate), polylactic acid (polylactic acid), polyethylene Oxides, polyvinyl acetate, polyacrylic acid, polycaprolactone, polyacrylonitrile, polyvinylpyrrolidone, polyvinyl chloride , Selected from the group consisting of polycarbonate, PC (polycarbonate), polyetherimide, polyesthersulphone, polybenzimidazol, polyethylene terephthalate, polybutylene terephthalate and fluorine-based compound It may contain the above.
  • the fiber M1 may be one in which the
  • the conductive material M2 may be coated on the outer surface of the above-described fiber M1 to impart electrical conductivity to the conductive fiber web M, and may be used without limitation in the case of a material having electrical conductivity.
  • the conductive material (M2) may be at least one metal selected from the group consisting of nickel, copper, silver, gold, chromium and platinum, or may be formed of any one or more of conductive polymer compounds. The conductive polymer compound may be mixed.
  • the pressure applying members 130 and 230 may be disposed between the first conductive sheet portions 110 and 210 and the second conductive sheet portions 120 and 220.
  • the pressure applying members 130 and 230 may be reduced in thickness by external force.
  • the shield can electromagnetic shielding sheet (100, 200, 300) according to an embodiment of the present invention when the external force is applied, the overall thickness can be reduced.
  • the shield shield electromagnetic shield sheet (100,200,300) when the shield shield electromagnetic shield sheet (100,200,300) according to an embodiment of the present invention is interposed between the shield can 20 and the metal bracket 30, the shield shield electromagnetic shield sheet (100,200,300) is given the pressure
  • the members 130 and 230 may be compressed to a sufficient thickness.
  • the shielding shield electromagnetic shield sheet (100, 200, 300) according to an embodiment of the present invention can minimize the compression of the first conductive sheet portion 110,210 and the second conductive sheet portion 120,220 itself by the external force While preventing the damage of the first conductive sheet portion (110, 210) and the second conductive sheet portion (120, 220) by the compressive force can be pressed to a sufficient thickness as the thickness allowed in the mounting portion.
  • the pressure applying member (130,230) may be made of a material that can be compressed by an external force. That is, the pressure applying members 130 and 230 may be a known member having an elastic restoring force that may be easily deformed by an external force applied from the outside and may be restored to its original shape when the external force is removed. In addition, the pressure applying members 130 and 230 may be a porous foam including a plurality of pores for flexibility and light weight.
  • the pressure applying members 130 and 230 may be a fibrous web or a sponge.
  • the fibrous webs may be polyurethane, polystyrene, polyvinylalchol, polymethyl methacrylate, and polymethyl methacrylate.
  • Polylactic acid Polyethylene oxide, polyvinyl acetate, polyacrylic acid, polycaprolactone, polyacrylonitrile, polyvinylpyrrolidone (polyvinylpyrrolidone), polyvinylchloride, polycarbonate, PC (polycarbonate), polyetherimide, polyesthersulphone, polybenzimidazol, poly terephthalate, polybutylene terephthalate And it may be composed of a fiber comprising one or more selected from the group consisting of fluorine-based compounds.
  • the pressure applying member (130,230) is a sponge
  • the sponge is made of polyurethane, styrene butadiene rubber, polychloroprene rubber, nitrile rubber, butyl rubber, isoprene rubber, ethylene propylene rubber, silicone rubber, fluoro rubber and acrylic rubber It may be a foam molded form including one or more selected from the group.
  • the shield can electromagnetic shielding sheet (100, 200, 300) according to an embodiment of the present invention when disposed in the space between the shield can 20 and the metal bracket 30, the total thickness of the shield shield electromagnetic shield sheet (100, 200, 300) It can be properly disposed in the space between the shield can 20 and the metal bracket 30 by being able to be sufficiently compressed by an external force even if the space is thicker than the thickness allowed.
  • the shield shield electromagnetic shield sheet (100, 200, 300) after the total thickness is reduced to a thickness that can be disposed in the space and the thickness and volume again through the restoring force of the pressure applying member (130,230) itself
  • the first conductive sheet portions 110 and 210 and the second conductive sheet portions 120 and 220 disposed on the upper side and the lower side of the pressure applying members 130 and 230 may be pushed outward.
  • the first and second conductive sheet parts 110 and 210 and the second conductive sheet parts 120 and 220 disposed on both sides of the pressure applying members 130 and 230 are respectively shielded through the restoring force of the pressure applying members 130 and 230.
  • the metal bracket 30 may be moved to the side of the shield can 20 and the metal bracket 30 so as to be always interviewed.
  • the first conductive sheet portions 110 and 210 and the second conductive sheet portions 120 and 220 may be smoothly connected to the shield can 20 and the metal bracket 30, and the first conductive sheet portions 110 and 210.
  • the gap between the interface of the shield can 20 can be prevented or minimized.
  • the electromagnetic wave generated in the circuit device 12 may be blocked or minimized from being leaked to the outside through a gap formed between the interface between the first conductive sheet parts 110 and 210 and the shield can 20.
  • the shield shield electromagnetic shield sheet (100, 200, 300) according to an embodiment of the present invention is mounted between the shield can 20 and the metal bracket 30 in a compressed state of 70 to 80% with respect to the initial thickness.
  • the shield shield electromagnetic shield sheet (100, 200, 300) may be in direct contact with one side of the shield can 20, the other surface is in direct contact with the metal bracket 30. Can be.
  • the shielding shield electromagnetic shield sheets 100, 200, and 300 may be electrically connected to the shield can 20 and the metal bracket 30, respectively, and the electromagnetic waves generated from the circuit elements 12 may be shielded from the shield can 20 and the metal bracket ( Through 30) and then released to the ground side.
  • the shield shield electromagnetic shield sheet (100, 200, 300) may have a total thickness of 400 ⁇ m before compression, the thickness in the compressed state to insert into the space between the shield can 20 and the metal bracket 30 May be 150 to 250 ⁇ m.
  • the thickness in the compressed state of the shield can electromagnetic shielding sheet (100, 200, 300) it should be understood that can be compressed to a sufficient thickness for the initial thickness.
  • the thickness tolerances of the shield can 20 and the metal bracket 30, and the like the thickness can be implemented with an appropriate thickness.
  • the pressure applying members 130 and 230 may have a relatively smaller size or narrower cross-sectional area than the first conductive sheets 111 and 211 and the second conductive sheets 121 and 221, and the first conductive sheet parts 110 and 210 and the first conductive sheets 111 and 210. It may be a form disposed between the two conductive sheet portion (120, 220). This will be described later.
  • the pressure applying members 130 and 230 may be conductive or nonconductive.
  • the pressure applying members 130 and 230 may be formed of a material having both elastic force and electrical conductivity, and may have a form in which an electrically conductive component is separately included in the material having elastic force.
  • the conductive pressure applying member may be a conductive sponge having a plating layer including an inner surface of pores in the sponge or a conductive fibrous web having a plating layer formed on an outer surface of the fiber.
  • the pressure applying members 130 and 230 are preferably made of a non-conductive material.
  • the second conductive sheet portions 120 and 220 are stacked on one surface of the first conductive sheet portions 110 and 210, and are stacked on the first conductive sheet portions 110 and 210 so that at least a portion thereof covers the pressure applying members 130 and 230. Can be. One side of the second conductive sheet parts 120 and 220 may be interviewed with the metal bracket 30 when used.
  • the second conductive sheet parts 120 and 220 may have electrical conductivity, so that the first conductive sheet parts 110 and 210 and the metal bracket 30 may be electrically connected to each other.
  • the second conductive sheet portions 120 and 220 may include a second conductive sheet 121 having electrical conductivity, and the conductive adhesive member 122 is disposed on at least one surface of the second conductive sheet 121. Can be.
  • the second conductive sheet portions 120 and 220 may be attached to the first conductive sheet portions 110 and 210 through the conductive adhesive member 113 disposed on the upper surface of the first conductive sheet 111. It may be integrated with the seat parts 110 and 210.
  • the shield shield electromagnetic shield (100, 200, 300) is inserted into the space between the shield can 20 and the metal bracket 30 according to an embodiment of the present invention disposed on one surface of the second conductive sheet (121,221)
  • the conductive adhesive member 122 may be attached to one surface of the metal bracket 30.
  • the second conductive sheet parts 120 and 220 are not limited thereto, and the conductive adhesive member 122 disposed on one surface of the second conductive sheets 121 and 221 may be omitted.
  • the second conductive sheets 121 and 221 may be made of a different material from the first conductive sheet 111 or may be made of the same material.
  • the second conductive sheets 121 and 221 may be thin metal sheets, such as copper foil or aluminum, as shown in FIGS. 3, 11, and 19.
  • the second conductive sheets 121 and 221 are fibers M1 coated with a conductive material M2 on the outer surface of the second conductive sheets 121 and 221, as shown in FIGS. 4, 12, and 20. It may be a conductive fibrous web (M) formed in a three-dimensional network structure.
  • the second conductive sheets 121 and 221 may have flexibility and compressibility, so that the second conductive sheets 121 and 221 may have fine bends rather than completely horizontal surfaces.
  • the bracket 30 can be kept in an interview state at all times. Through this, the second conductive sheets 121 and 221 may have improved electrical conductivity with the metal bracket 30.
  • the second conductive sheets 121 and 221 are compressed by an external force, the gap between the fibers M1 coated with the conductive material M2 is narrowed by the compressive force, so that the vertical resistance is greatly reduced, thereby increasing electrical conductivity.
  • the conductive adhesive members 122 are conductive adhesive members 112 and 113 disposed on at least one surface of the first conductive sheets 111 and 211. It may be made of a different material but may be made of the same material as the conductive adhesive members (112, 113).
  • the first conductive sheet portions 110 and 210 and the second conductive sheet portions 120 and 220 may have a relatively larger size or wider cross-sectional area than the pressure applying members 130 and 230. Accordingly, the first conductive sheet portions 110 and 210 and the second conductive sheet portions 120 and 220 may be disposed so that at least a portion thereof covers one surface of the pressure applying members 130 and 230, and the remaining portions are formed on one surface of the other conductive sheet portion. It may be directly stacked via the conductive adhesive member 113.
  • electricity may flow directly from the first conductive sheet portions 110 and 210 to the second conductive sheet portions 120 and 220 through the remaining portions, thereby allowing the first conductive sheets 111 and 211 and the second conductive sheets 121 and 221 to flow.
  • the conduction path of the liver may be formed in the shortest distance.
  • the second conductive sheets 121 and 221 may include a first portion 121a directly stacked on one surface of the pressure applying members 130 and 230 and the first conductive sheet as shown in FIGS. 3 and 11.
  • a second portion 121b may be directly stacked on one surface of the 111, and the first portion 121a and the second portion 121b may have a ring-shaped third portion 121c having a predetermined height.
  • the pressure applying members 130 and 230 may be disposed only in an area corresponding to the first portion 121a between the first conductive sheet portion 110 and the second conductive sheet portion 120 and 220.
  • the pressure applying members 130 and 230 are disposed only between the first portion 121a and the first conductive sheet 111 without being disposed between the second portion 121b and the first conductive sheet 111.
  • one surface of the first portion 121a and the second portion 121b may be formed as a stepped surface having a step corresponding to the thickness of the pressure applying members 130 and 230.
  • the distance between the first portion 121a and the first conductive sheet 111 may have a length longer than the distance between the second portion 121b and the first conductive sheet 111.
  • the shortest distance may be maintained at all times regardless of the overall thickness of the pressure applying members 130 and 230. have.
  • the shield shield electromagnetic shield sheet 100 (200) is a second portion (1) and the first conductive sheet 111 and the second conductive sheet (121,221) are stacked in a vertical direction relatively close to the second portion ( 121b) may be connected to each other.
  • the conductive path between the first conductive sheet 111 and the second conductive sheet 121 and 221 may be formed at the shortest distance, thereby reducing electrical resistance and improving electrical conductivity.
  • the conduction path may always be formed at the shortest distance through the second portion 121b, so that the electrical conductivity between the sheets may be increased even if the thickness of the pressure applying members 130 and 230 is increased to increase the overall thickness of the shielding sheets 100 and 200. It can be kept constant without being reduced, and the thickness of the portion serving as the conduction path between the sheets can be kept sufficiently thin.
  • the overall thickness of the shielding sheet 100 or 200 may be freely changed while maintaining the electrical conductivity between the first conductive sheet portion 110 and the second conductive sheet portion 120 and 220. Can be increased or decreased freely to increase design freedom.
  • the electromagnetic wave shielding sheet 100 or 200 has a sufficient thickness of the pressure applying members 130 and 230 even if the total thicknesses of the first conductive sheet 111 and the second conductive sheet 121 and 221 are not increased. In the case of having a total thickness can be sufficiently increased by the desired thickness.
  • the vertical resistance is reduced, so that the electrical conductivity can be increased, and even if the overall thickness has a sufficient thickness, pressure is applied. Since sufficient compression is possible through the members 130 and 230, it can be freely changed to the required thickness in use.
  • the adhesive member 132 may be interposed between the pressure applying members 130 and 230 and the first portion 121a facing each other, and the adhesive member 132 may have conductivity, but the vision may be considered when considering the material cost. It is preferable to have a conductivity.
  • the second portion 121b of the second conductive sheets 121 and 221 may be formed to be positioned at the edge of the first conductive sheet 111, or to be located inside the first conductive sheet 111. It may be formed.
  • the second conductive sheet 121 is disposed such that the second portion 121b surrounds the edge of the first portion 121a, thereby forming the first conductive sheet portion. It may be laminated on the first conductive sheet portion 110 to cover the edge of the (110).
  • the pressure applying member 130 may be provided in the form of a plate having a predetermined area and thickness, and may have a relatively smaller size than the second conductive sheet 121 and the first conductive sheet 111. Can be.
  • the pressure applying member 130 may be disposed in the inner region of the first conductive sheet 111, and the second portion 121b may be disposed to surround the edge of the pressure applying member 130.
  • One surface of the first conductive sheet 111 may be directly laminated via the conductive adhesive member 113.
  • the second conductive sheet 221 may be formed such that the second portion 121b is located inside the first portion 121a as illustrated in FIGS. 9 to 16.
  • a partial area of the inner side corresponding to the second portion 121b among the total area of the two conductive sheets 221 may be formed to be convex downward.
  • the pressure applying member 230 may have a penetrating portion 233 having a predetermined area therethrough in an area corresponding to the second portion 121b, and the penetrating portion 233 may be formed in the second portion. It may have a larger size than the portion 121b.
  • the pressure applying member 230 may be disposed such that the penetrating portion 233 surrounds the edge of the second portion 121b, and the second portion 121b is disposed in the penetrating portion 233. By being disposed, it may be directly stacked on one surface of the first conductive sheet 111 via the conductive adhesive member 113.
  • the second portion 121b when the second portion 121b is formed to be positioned inside the first portion 121a, it is noted that the second portion 121b may be formed in plural numbers.
  • the first conductive sheet 211 may include a first portion 211a directly stacked on one surface of the pressure applying member 230 and the second conductive sheet 321 as shown in FIG. 19. And a second portion 211b directly stacked on one surface of the first portion 211a and the second portion 211b through a ring-shaped third portion 211c having a predetermined height. Can be interconnected.
  • the pressure applying member 230 may be disposed only in an area corresponding to the first portion 211a between the first conductive sheet portion 210 and the second conductive sheet portion 320.
  • the pressure applying member 230 is not disposed between the second portion 211b and the second conductive sheet 321, but is disposed only between the first portion 211a and the second conductive sheet 321.
  • one surface of the first portion 211a and the second portion 211b may be formed as a stepped surface having a step corresponding to the thickness of the pressure applying member 230.
  • the distance between the first portion 211a and the second conductive sheet 321 may have a length longer than that between the second portion 211b and the second conductive sheet 321.
  • the pressure applying member 130 is not disposed between the second portion 211b and the second conductive sheet 321 so that the conduction distance is always the shortest distance regardless of the overall thickness of the pressure applying member 230. It can be formed as.
  • the shielding shielding electromagnetic wave sheet 300 is a second portion (1) and the first conductive sheet 211 and 321 stacked in a vertical direction relatively close to the second portion ( Via 211b).
  • the conductive path between the first conductive sheet 211 and the second conductive sheet 321 can be formed in the shortest distance, thereby reducing the vertical resistance and improving the electrical conductivity.
  • the conductive path may always be formed at the shortest distance through the second portion 211b, so that the electrical conductivity between the sheets may be increased even if the thickness of the pressure applying member 230 is increased to increase the overall thickness of the shield sheet 300. It can be kept constant without being reduced, and the thickness of the portion serving as the conduction path between the sheets can be kept sufficiently thin.
  • the overall thickness of the shielding sheet 300 may be freely changed while maintaining the electrical conductivity between the first conductive sheet portion 210 and the second conductive sheet portion 320. Can be increased or decreased freely to increase design freedom.
  • the electromagnetic wave shielding sheet 300 has a sufficient thickness of the pressure applying member 230 even if the total thickness of the first conductive sheet 211 and the second conductive sheet 321 is not increased. In the case of having a total thickness can be sufficiently increased by the desired thickness.
  • the vertical resistance is reduced, thereby increasing the electrical conductivity, and applying pressure even if the overall thickness has a sufficient thickness. Since sufficient compression is possible through the member 230, it can be freely changed to the thickness required in use.
  • the adhesive member 132 may be interposed between the pressure applying member 230 and the first portion 211a facing each other, and the adhesive member 132 may have conductivity, but the vision may be considered when considering the material cost. It is preferable to have a conductivity.
  • the second portion 211b of the first conductive sheet 211 may be formed inside the second conductive sheet 321.
  • the first conductive sheet 211 may be formed such that the second portion 211b is located inside the first portion 211a as shown in FIGS. 17 to 23.
  • a partial area of the inner side corresponding to the second portion 211b of the entire area of the sheet 211 may be formed to be convex upward.
  • the pressure applying member 230 may have a penetrating portion 233 having a predetermined area therethrough in an area corresponding to the second portion 211b, and the penetrating portion 233 may be formed in the second portion. It may have a larger size than the portion 211b.
  • the pressure applying member 230 may be disposed such that the penetrating portion 233 surrounds the edge of the second portion 211b, and the second portion 211b is in the penetrating portion 233. By being disposed, it may be directly stacked on one surface of the second conductive sheet 321 via the conductive adhesive member 113.
  • any one of the first conductive sheet portions 110 and 210 and the second conductive sheet portions 120 and 220 may be formed into a first portion 211a and 121a.
  • the stepped structure having the second portions 211b and 121b may be formed, and the thickness of the pressure applying members 130 and 230 may be accommodated through the step height.
  • the product may be completed, thereby simplifying the manufacturing process and assembling productivity. It can increase.
  • the shield shield electromagnetic shield sheet (100, 200, 300) according to an embodiment of the present invention after the first conductive sheet portion 110,210, pressure applying member (130,230) and second conductive sheet portion (120,220) separately produced
  • One product may be implemented through the lamination method.
  • the shield shield electromagnetic shield sheet (100, 200, 300) according to an embodiment of the present invention is the shape of the shield can 20 through the shape processing of the first conductive sheet portion (110,210) and the second conductive sheet portion (120,220).
  • a product having a suitable shape can be implemented in various ways.
  • the shield shield electromagnetic shield sheet (100, 200, 300) may be formed in the opening 140 having a predetermined area therein (see Figs. 1, 9 and 17).
  • the opening 140 may provide a passage through which heat generated when the circuit 12 is mounted on the circuit board 10 may be transferred to the metal bracket 30, thereby providing a circuit element 12 due to heat.
  • Various problems such as malfunction can be solved.
  • the opening 140 may be formed in a region corresponding to the circuit device 12 located inside the shield can 20 as shown in FIGS. 8, 16, and 23.
  • Such an opening 140 may be formed through a punching process, but the method of forming the opening 140 is not limited thereto, and all known cutting processes such as laser processing may be applied.
  • the shield shield electromagnetic shield sheet 100 is formed such that the second portion 121b surrounds the edge of the first portion 121a as shown in FIGS. 1 to 8.
  • the opening 140 may be formed inside the first portion 121a and may be formed to pass through the first conductive sheet portion 110 and the pressure applying member 130 at the same time (FIG. 3). Reference).
  • the opening 140 may be formed to penetrate the second conductive sheet portion 120, and may be formed to penetrate only the first conductive sheet portion 110 and the pressure applying member 130 simultaneously. It may be sealed through the second conductive sheet portion 120.
  • the second part 121b is convex inside the first part 121a.
  • the opening 140 may be formed in the second portion 121b.
  • the opening 140 may be formed to simultaneously pass through the first conductive sheet portions 110 and 210 and the second conductive sheet portion 120 as shown in FIG. 11.
  • the second portion 121b may be positioned inside the first portion 121a and define an edge of the opening 140.
  • the opening 140 may be formed to penetrate only the first conductive sheet portion 210, as shown in FIG. 19, and an open side of the opening 140 is the second conductive sheet portion 320. It may be sealed through).
  • the fiber M1 coated with the conductive material M2 is formed between the first conductive sheet portion 210 and the second conductive sheet portion 320 in a three-dimensional network structure.
  • the opening 140 may be formed to penetrate the first conductive sheet portion 210 and the conductive fibrous web layer 170, and the opening 140 may be opened. One side may be sealed through the second conductive sheet portion 320.
  • the peripheral portion defining the edge of the opening 140 may be in direct contact with the first conductive sheet portion 210 and the conductive fiber web layer 170.
  • the size of the first conductive sheet portion 110,210 and the second conductive sheet portion 220,320 may be the same or have different sizes. It may be.
  • the size of the first conductive sheet portion (110, 210) and the second conductive sheet portion (220, 320) may mean the area formed by the width and the vertical width defining the edge, the size is relatively large The meaning is not only when the width and height are relatively larger sizes, but also when either the width and height are the same but the other is the larger size.
  • the size of the second conductive sheet portion 210 may be the same as or larger than the size of the first conductive sheet portion 110. More specifically, the size of the second conductive sheet 211 may be the same as or larger than the size of the first conductive sheet 111.
  • the first portion The size of the conductive sheet portion 210 may be the same as or larger than the size of the second conductive sheet portion 320.
  • the size of the first conductive sheet portion 210 is equal to the second conductive sheet portion 210.
  • the sheet part 320 and the conductive fibrous web layer 170 may have the same size or a relatively larger size. More specifically, the size of the first conductive sheet 211 may be the same as or larger than the size of the second conductive sheet 321 and / or the conductive fibrous web layer 170.
  • the openings 140 may be formed between the first conductive sheets 111 and 211 and the second conductive sheets 221 and 321 or between the first conductive sheets 211 and the conductive fibrous web layer 170.
  • the pressure applying member 230 disposed is deformed by an external force applied during the punching process, the second part 121b formed to be convex upwardly is directly attached to the first conductive sheet part 110 or formed convexly downward. This is to allow the second portion 211b to be directly attached to the second conductive sheet portion 320 or the conductive fibrous web layer 170.
  • the above-described shield can electromagnetic shield sheet (100, 200, 300) is a separate device (T) between the circuit element 12 and the metal bracket 30 when the opening 140 is formed in a region corresponding to the circuit element 12.
  • various members may be arranged to perform a predetermined function.
  • the above-described shield can electromagnetic shield sheet (100, 200) may be provided with a step compensation member (150, 250) to compensate for the step difference between the first portion (121a) and the second portion (121b) (Fig. 5, Fig. 7, see FIG. 13 and FIG. 15).
  • the step compensation members 150 and 250 may be provided in a ring shape and disposed on an upper side of the second portion 121b, and one surface of the step compensation members 150 and 250 may be formed on the second conductive sheets 121 and 221.
  • a conductive adhesive member 122 interposed on one surface may be formed on a horizontal surface.
  • the step compensation members 150 and 250 may be made of the same material as the pressure applying members 130 and 230 described above.
  • the shield can electromagnetic shielding sheet (100,200) is inserted in the compressed state between the shield can 20 and the metal bracket 30 in accordance with an embodiment of the present invention the step compensation members (150,250) By pressing the second part 121b, it is possible to prevent the second part 121b from being separated from the first conductive sheet parts 110 and 210.
  • the shield shield electromagnetic shield sheet (100,200) according to an embodiment of the present invention, the second conductive sheet portion 120,220 conductive fiber (M1) coated with a conductive material (M2) conductive fiber formed in a three-dimensional network structure
  • a plate-shaped metal sheet 160 made of a metal material may be disposed on one surface of the second conductive sheet parts 120 and 220 (see FIGS. 6, 7, 14, and 15).
  • the metal sheet 160 may be attached to the second conductive sheet portions 120 and 220 through the conductive adhesive member 122 included in the second conductive sheet portions 120 and 220, and the exposed surface may be used.
  • the metal bracket 30 may be directly interviewed.
  • the metal sheet 160 has an upper surface of the first portion 121a. And it may be in the form of covering the upper surface of the step compensation member (150,250) at the same time.
  • the shielding electromagnetic shield sheet 300 for a shield can according to an embodiment of the present invention
  • the second conductive sheet portion 320 includes a plate-shaped metal sheet
  • the first conductive sheet portion 210 is formed inside
  • a separate conductive fibrous web M having a three-dimensional network structure formed with the fiber M1 coated with the conductive material M2 is formed.
  • the layer 170 may be additionally disposed between the first conductive sheet portion 210 and the second conductive sheet portion 320.
  • the conductive adhesive members 112, 113 and 122 interposed on one or both surfaces of the first conductive sheets 111 and 211 and the second conductive sheets 121 and 221 in the electromagnetic shielding sheets 100, 200 and 300 for the shield can are all known conductive adhesive members.
  • the conductive adhesive members 112, 113, and 122 may be a conductive filler dispersed in an adhesive matrix.
  • the adhesive matrix may be formed of at least one resin selected from acrylic resin and urethane resin, and the conductive filler is selected from the group consisting of nickel, nickel-graphite, carbon black, graphite, alumina, copper, and silver. It may be abnormal.
  • the conductive adhesive members 112, 113, and 122 may be tacky or adhesive, and may be an inorganic material type or a substrate type capable of energizing in the vertical direction.
  • the shield shield electromagnetic shield sheets 100, 200 and 300 for preventing the conductive adhesive members 112 and 122 disposed on one surface of the first conductive sheets 111 and 211 and the second conductive sheets 121 and 221, respectively, from being exposed to the outside.
  • a separate protective film (not shown) may be disposed. Such a protective film may be a release film removable in use.
  • the first conductive sheets 111 and 211 that can be applied to the present invention are illustrated as being formed of a conductive fibrous web M formed of a three-dimensional network structure in which a fiber M1 coated with a conductive material M2 on an outer surface thereof.
  • the present invention is not limited thereto, and the first conductive sheets 111 and 221 may also employ a metal sheet similarly to the second conductive sheets 121 and 221.
  • the second conductive sheets 121 and 221 may be the above-described metal sheets, and the fiber M1 coated with the conductive material M2 on the outer surface may be formed as the conductive fiber web M formed in a three-dimensional network structure. It may be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne une feuille de protection contre les ondes électromagnétiques pour un boîtier de protection. La feuille de protection contre les ondes électromagnétiques pour le boîtier de protection selon un mode de réalisation donné à titre d'exemple de la présente invention est disposée entre un support métallique et un boîtier de protection pour bloquer les ondes électromagnétiques qui sont générées dans un élément de circuit, et comprend : une première partie de feuille conductrice comprenant une première feuille conductrice ayant des propriétés électroconductrices, et un élément adhésif conducteur intercalé entre les deux surfaces de la première feuille conductrice ; un élément de transmission de pression qui est disposé sur une surface de la première partie de feuille conductrice et qui peut être comprimé par une force externe ; et une seconde partie de feuille conductrice comprenant une seconde feuille conductrice ayant des propriétés électroconductrices et disposée sur ladite surface de la première partie de feuille conductrice de façon à recouvrir au moins une surface de l'élément de transmission de pression, la seconde partie de feuille conductrice étant électriquement connectée à la première partie de feuille conductrice.
PCT/KR2017/012316 2016-11-02 2017-11-02 Feuille de protection contre les ondes électromagnétiques pour boîtier de protection WO2018084591A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/346,813 US10653047B2 (en) 2016-11-02 2017-11-02 Electromagnetic wave shielding sheet for shield-can
CN201780067023.6A CN109892031B (zh) 2016-11-02 2017-11-02 屏蔽罩用电磁波屏蔽片

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2016-0145007 2016-11-02
KR20160145007 2016-11-02
KR1020170058086A KR20180048250A (ko) 2016-11-02 2017-05-10 쉴드캔용 전자파 차폐시트
KR10-2017-0058086 2017-05-10
KR10-2017-0119473 2017-09-18
KR1020170119473A KR101928826B1 (ko) 2016-11-02 2017-09-18 쉴드캔용 전자파 차폐시트

Publications (1)

Publication Number Publication Date
WO2018084591A1 true WO2018084591A1 (fr) 2018-05-11

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WO (1) WO2018084591A1 (fr)

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CN112514546A (zh) * 2018-08-08 2021-03-16 三星电子株式会社 包含连接到覆盖屏蔽罩开口的传导板的屏蔽构件的电子设备

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KR20080005005A (ko) * 2006-07-07 2008-01-10 제일모직주식회사 전자파 차폐용 탄성다공체 시트 및 그 제조방법
US20100224399A1 (en) * 2007-04-17 2010-09-09 Nano Interface Technology Electromagnetic wave shielding heat-radiation sheet and manufactured method thereof
KR20130136386A (ko) * 2012-06-04 2013-12-12 주식회사 아모그린텍 전자파 차폐시트, 그 제조방법 및 이를 구비한 내장형 안테나
KR20140122815A (ko) * 2013-04-11 2014-10-21 주식회사 나노인터페이스 테크놀로지 차폐시트 제조방법 및 그 제조방법에 의해 제조된 차폐시트
US20160021798A1 (en) * 2014-07-18 2016-01-21 Ich Co., Ltd. Emi gasket for shielding electromagnetic wave

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KR20080005005A (ko) * 2006-07-07 2008-01-10 제일모직주식회사 전자파 차폐용 탄성다공체 시트 및 그 제조방법
US20100224399A1 (en) * 2007-04-17 2010-09-09 Nano Interface Technology Electromagnetic wave shielding heat-radiation sheet and manufactured method thereof
KR20130136386A (ko) * 2012-06-04 2013-12-12 주식회사 아모그린텍 전자파 차폐시트, 그 제조방법 및 이를 구비한 내장형 안테나
KR20140122815A (ko) * 2013-04-11 2014-10-21 주식회사 나노인터페이스 테크놀로지 차폐시트 제조방법 및 그 제조방법에 의해 제조된 차폐시트
US20160021798A1 (en) * 2014-07-18 2016-01-21 Ich Co., Ltd. Emi gasket for shielding electromagnetic wave

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112514546A (zh) * 2018-08-08 2021-03-16 三星电子株式会社 包含连接到覆盖屏蔽罩开口的传导板的屏蔽构件的电子设备
CN112514546B (zh) * 2018-08-08 2024-03-08 三星电子株式会社 包含屏蔽构件的电子设备

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