WO2020060120A1 - Procédé de production de feuille de protection contre le champ magnétique, et feuille de protection contre le champ magnétique produite par ce procédé - Google Patents

Procédé de production de feuille de protection contre le champ magnétique, et feuille de protection contre le champ magnétique produite par ce procédé Download PDF

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Publication number
WO2020060120A1
WO2020060120A1 PCT/KR2019/011923 KR2019011923W WO2020060120A1 WO 2020060120 A1 WO2020060120 A1 WO 2020060120A1 KR 2019011923 W KR2019011923 W KR 2019011923W WO 2020060120 A1 WO2020060120 A1 WO 2020060120A1
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WIPO (PCT)
Prior art keywords
shielding sheet
sheet
magnetic field
magnetic
straight
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2019/011923
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English (en)
Korean (ko)
Inventor
장길재
이동훈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amosense Co Ltd
Original Assignee
Amosense Co Ltd
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 KR1020180159120A external-priority patent/KR102525698B1/ko
Application filed by Amosense Co Ltd filed Critical Amosense Co Ltd
Publication of WO2020060120A1 publication Critical patent/WO2020060120A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • 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 a method for manufacturing a magnetic field shielding sheet, and more specifically, by applying an improved process, dividing the magnetic field shielding sheet into a plurality of pieces, thereby simplifying the process and manufacturing a magnetic field shielding sheet capable of reducing manufacturing cost. It relates to a method and an electronic device produced thereby, such as a magnetic field shielding sheet for wireless charging.
  • Mobile terminal devices including mobile phones and tablet PCs include various functions such as near field wireless communication (NFC) and wireless charging using a magnetic field.
  • NFC near field wireless communication
  • magnetic field wireless charging using a magnetic field
  • the portable terminal device includes a magnetic field shielding sheet to prevent heat generated by eddy current caused by the magnetic field and to improve performance.
  • NFC near field communication
  • wireless charging are essentially non-contact transmission, so a magnetic field shielding sheet made of magnetic material is used to focus the magnetic field generated by the primary coil of the transmitting device to the secondary coil of the receiving device.
  • a magnetic field shielding sheet it is common to use a magnetic material such as an amorphous metal ribbon, ferrite, or a polymer sheet containing magnetic powder.
  • the magnetic field shielding sheet separated into a plurality of pieces can increase the communication distance and charging efficiency by increasing the quality factor (Q) of the secondary coil while blocking the effect of the magnetic field on the body and battery of the portable terminal device. .
  • the magnetic field shielding sheet may be separated into a plurality of pieces through a flake process.
  • a magnetic field shielding sheet is passed between a metal roller provided with a plurality of uneven or spherical balls on the outer surface and a rubber roller disposed to face the metal roller. Through this, the magnetic field shielding sheet can be separated into multiple pieces.
  • the flake process performed through a pair of rollers is difficult to control the size of pieces separated from each other because the entire area is pressed while the magnetic field shielding sheet passes between the pair of rollers. Accordingly, the magnetic field shielding sheet manufactured through the conventional flake process is difficult to produce to have various permeability.
  • the present invention was devised in view of the above points, and a method for manufacturing a magnetic field shielding sheet that can be separated into a plurality of pieces through a straight slit and cracks caused therefrom by forming at least one straight slit during the punching process, and There is an object to provide a magnetic field shielding sheet produced thereby.
  • another object of the present invention is to provide a method for manufacturing a magnetic field shielding sheet capable of variously controlling the magnetic permeability of the shielding sheet by adjusting the size and number of pieces separated from each other and the magnetic field shielding sheet produced thereby.
  • the present invention is a method for manufacturing a magnetic field shielding sheet formed of a plurality of pieces, comprising: preparing a magnetic sheet made of a magnetic material and having a first area; And a step of punching a shielding sheet from the magnetic sheet using a mold to separate a shielding sheet having a second area relatively narrower than the first area from the magnetic sheet. Step of punching the magnetic field shielding sheet to form at least one straight slit in the inner area of the second area through the mold so that the shielding sheet can be separated into a plurality of pieces while being separated from the magnetic sheet by a second area. It provides a method of manufacturing.
  • the mold may include a closed loop shape edge blade for processing the edge of the shielding sheet, and at least one straight edge blade for forming the linear slit.
  • the straight slit may be formed along a thickness direction of the shielding sheet having a predetermined length, and the shielding sheet may be formed into a plurality of pieces through cracks caused by at least one of the straight slit and the rim of the shielding sheet. Can be separated.
  • the shielding sheet may include a plurality of straight slits formed locally in the inner region, and the plurality of straight slits may be radially formed based on a virtual center point.
  • the shielding sheet may include a plurality of linearly formed slits spaced apart from each other in the inner region, and the plurality of straightened slits may be formed in a direction perpendicular to the width direction or the longitudinal direction of the shielding sheet. At least one of the first slit, the second slit formed in a direction parallel to the width direction or the longitudinal direction of the shielding sheet, and the third slit formed at an angle with respect to the width or length direction of the shielding sheet It may include the above.
  • the shielding sheet may include a plurality of linear slits formed at a distance from each other in the inner region, and the plurality of linear slits may not be directly connected to each other.
  • At least one of the upper and lower surfaces of the magnetic sheet may include a release film attached via an adhesive layer coated with an adhesive on both sides of the base substrate, and the step of punching the shielding sheet from the magnetic sheet The edge blade may be performed to penetrate both the magnetic sheet and the release film.
  • the magnetic sheet is a single-layer ribbon sheet comprising at least one or more of an amorphous alloy and a nano-crystalline alloy, or a multi-layered ribbon sheet comprising at least one or more of an amorphous alloy and a nano-crystalline alloy through an adhesive layer It may be a ribbon sheet.
  • the present invention is a magnetic field shielding sheet in which a shielding sheet made of a magnetic material is separated into a plurality of pieces, the plurality of pieces including pieces having different sizes and shapes, and the pieces are the shielding sheets At least one straight slit formed along the thickness direction of the, and may be separated from each other through a crack derived from at least one of the rim of the straight slit and the shielding sheet.
  • the magnetic field shielding sheet may include an adhesive layer interposed on at least one side of both sides, and the adhesive layer may be an adhesive coated on one side or both sides of the base substrate.
  • the magnetic field shielding sheet may further include a release film attached to at least one side of both surfaces via an adhesive layer.
  • the present invention is at least one antenna for receiving wireless power; And a magnetic field shielding sheet disposed on one surface of the antenna for receiving wireless power and shielding the magnetic field and focusing the magnetic field in a desired direction.
  • the present invention provides a portable terminal device including the above-described wireless power receiving device.
  • the present invention a straight slit causing cracks in the inner region of the shielding sheet during the punching process is formed, so that a shielding sheet separated into a plurality of pieces can be manufactured without additional processing.
  • the present invention can reduce the production cost by simplifying the manufacturing process.
  • the present invention can control the size and the total number of pieces separated from each other by adjusting the number of formation of the straight slits formed in the inner region of the shielding sheet to manufacture the shielding sheet having various permeability.
  • the present invention can be manufactured to have a permeability suitable for the use of the shielding sheet.
  • FIG. 1 is a flow chart showing a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention
  • Figure 2 is a schematic view showing a punching process in the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention
  • Figure 3 is a cross-sectional view showing a magnetic sheet that can be used in a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention, (a) is a magnetic sheet is a multi-layer ribbon sheet, (b) is a magnetic sheet Drawing showing the case of a single-layer ribbon sheet,
  • FIG. 4 is a view conceptually showing a straight slit and cracks induced therefrom in a magnetic field shielding sheet manufactured through a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention
  • FIG. 5 is a cross-sectional view showing a case where the magnetic field shielding sheet manufactured through the method of manufacturing the magnetic field shielding sheet according to an embodiment of the present invention is made of a multilayer ribbon sheet,
  • Figure 6 is a plan view showing a mold that can be used in a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention, a view showing the shape of various straight blades,
  • FIG. 7 is a view conceptually showing a straight slit formed through various molds of FIG. 6 and cracks caused therefrom;
  • FIG. 8 is a cross-sectional view showing a case where a magnetic field shielding sheet manufactured through a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention is made of a single layer ribbon sheet,
  • FIG. 9 is a view showing a wireless power receiving module according to an embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of FIG. 9.
  • a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention includes preparing a magnetic sheet (A) having a predetermined area as shown in FIG. 1 (S1) and shielding sheet from the magnetic sheet (A) 100) is cut into a predetermined size and punched to commercialize (S2).
  • the step of preparing the magnetic sheet (A) may be a pre-step of cutting the sheet into a predetermined size according to the intended use to produce the shielding sheet 100 as a final product.
  • the magnetic sheet (A) may have a predetermined area so that a plurality of shielding sheets (100) having a suitable size for use and use can be separated from the magnetic sheet (A).
  • the magnetic sheet A may be made of a magnetic material so that the shielding sheet 100 punched out from the magnetic sheet A shields magnetic fields generated from various antennas and focuses them in a desired direction.
  • the antenna is a combination of two or more of a wireless power transmission (WPT) antenna for wireless charging, a magnetic secure transmission (MST) antenna for magnetic payment, and a near field communication (NFC) antenna for near field communication. It can be composed of older brothers.
  • WPT wireless power transmission
  • MST magnetic secure transmission
  • NFC near field communication
  • the magnetic sheet A may be provided as a sheet-like sheet having a predetermined area.
  • the magnetic sheet (A) may be a sheet-like sheet having a first area.
  • the magnetic sheet (A) may be formed of an adhesive layer 122 on at least one of the upper and lower surfaces, and the adhesive layer 122 may be coated with adhesive on one or both sides of the base substrate.
  • the shielding sheet 100 separated from the magnetic sheet A in the punching process described later is formed separately into a plurality of pieces P, the pieces P are not separated through the adhesive layer 122. Without being separated. Accordingly, the shielding sheet 100 may maintain a plate-like sheet shape.
  • the adhesive constituting the adhesive layer 122 may serve to insulate all or part of the neighboring fragments P in whole or in part by penetrating some or all of the gaps between the fragments P.
  • the adhesive may include a non-conductive component to insulate adjacent pieces P from each other.
  • the adhesive layer 122 formed on at least one of the upper surface and the lower surface of the magnetic sheet (A) may be at least one of which is coated with adhesive on both sides of a base substrate such as PET or PI.
  • a removable release film 120 may be attached to the exposed surface of the adhesive layer 122.
  • the final product the shielding sheet 100
  • the shielding sheet 100 may be attached to other parts by attaching other parts or attaching the shielding sheet 100 to other parts as the adhesive may be exposed to the outside after the release film 120 is removed in the process of use. You can.
  • a pair of release films 120 may be attached to the upper and lower surfaces of the magnetic sheet A through the adhesive layer 122.
  • the adhesive layer 122 may be coated with adhesive on both sides of the base substrate.
  • the release film 120 may be attached via the adhesive layer 122 to only one of the upper and lower surfaces of the magnetic sheet (A).
  • the adhesive layer 122 may be coated with adhesive on both sides of the base substrate.
  • a separate adhesive layer may not be formed on the other surface to which the release film 120 is not attached, or an adhesive layer coated with an adhesive may be formed on only one surface of the base substrate.
  • the adhesive layer 122 is not limited thereto, and the adhesive layer 122 may be a liquid or gel adhesive.
  • the magnetic sheet (A) may be a ribbon sheet comprising at least one or more of the amorphous alloy and the nano-crystalline alloy.
  • the magnetic sheet (A) is a plurality of ribbon sheets (111a) comprising at least one of the amorphous alloy and the nano-crystalline alloy as shown in Figure 3 (a) is a medium through the adhesive layer (111b) It may be a multi-layered ribbon sheet 110 laminated in multiple layers.
  • the adhesive layer 111b may include a non-conductive component.
  • the shielding sheet 100 separated from the magnetic sheet (A) through a punching process to be described later is a plurality of ribbon sheets (111a) are laminated in multiple layers via the adhesive layer (111b) as shown in FIG. It may be composed of a multi-layer ribbon sheet 110.
  • the adhesive layer 111b moves toward the two ribbon sheets 111a constituting the shielding sheet 100, and partially or entirely permeates between pieces P adjacent to each other (pieces adjacent to each other) P) can be insulated.
  • the magnetic sheet (A) is composed of a multilayer ribbon sheet 110, the above-described adhesive layer 122 and release film 120 may be omitted.
  • the magnetic sheet (A) may be a single-layer ribbon sheet (111a) comprising at least one of the amorphous alloy and the nano-crystalline alloy as shown in Figure 3 (b).
  • the shielding sheet 300 ′ separated from the magnetic sheet A through a punching process described later may be composed of a single-layer ribbon sheet 111a as illustrated in FIG. 8.
  • the above-described adhesive layer 122 and the release film 120 may be sequentially provided on at least one of the upper and lower surfaces of the magnetic sheet A.
  • the material of the magnetic sheet (A) is not limited to this, and any material containing a magnetic material may be used. That is, the magnetic sheet (A) may be a magnetic sheet obtained by sintering ferrite or a magnetic sheet obtained by mixing and molding soft magnetic powder and a binder. In addition, the magnetic sheet (A) is also possible to use a composite sheet prepared by mixing a soft magnetic powder and a resin for a binder, and mixing Ni and Fe elements in a predetermined ratio, such as permalloy, or predetermined Fe and Co elements It can be used by mixing in a ratio of.
  • step (S2) of punching the shielding sheet 100 from the magnetic sheet (A) is a shielding sheet 100 having a second area from one magnetic sheet (A) having a first area through the mold 10 ).
  • the second area may be a relatively narrow area than the first area.
  • a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention can produce a plurality of shielding sheets 100 from one magnetic sheet (A) through a punching process.
  • the method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention may be separated into a plurality of pieces while the individual shielding sheet 100 is separated from the magnetic sheet A through a punching process.
  • step (S2) of punching the shielding sheet 100 from the magnetic sheet (A) is the inner area of the second area defined by the border together with the border of the shielding sheet 100 through the mold 10 At least one straight slit 131 may be simultaneously formed.
  • the mold 10 as shown in Figure 2, the edge of the closed loop shape for processing the edge of the shielding sheet 100 (closed loop shape) 12 and the linear slit 131 It may include at least one straight blade 14 disposed inside the edge of the edge 12 to form a.
  • the shielding sheet 100 separated from the magnetic sheet (A) has a rim side through the rim blade 12 and the magnetic sheet (A).
  • a straight slit 131 having the same shape as the straight blade 14 may be formed through the straight blade 14 in the inner region.
  • At least one linear blade 14 for forming the linear slit 131 may have the protruding length equal to the protruding length of the edge blade 12 for processing the edge of the shielding sheet, or the edge blade 12 It may be relatively shorter than the protruding length of.
  • the straight slit 131 may be formed to penetrate the entire thickness of the magnetic sheet A, or may be formed only on a portion of the entire thickness of the magnetic sheet A.
  • the shielding sheet 100 separated from the magnetic sheet A may include the straight slit 131 formed along a thickness direction or a height direction inside.
  • the straight slits 131 may be formed at positions corresponding to the straight blades 14, respectively, and the straight slits 131 may include the straight blades in the inner region of the shielding sheet 100 except for the border. 14) can be formed locally.
  • the shielding sheet 100 is in direct contact with the rim blade 12 and the straight blade 14 of the mold 10 in the punching process, and the pressing force applied from the rim blade 12 and the straight blade 14 is applied.
  • the straight slit 131 and the crack 132 caused by at least one of the rim of the shielding sheet may be formed, the straight slit 131 and the induced crack 132 may be connected to each other.
  • the shielding sheet 100 separated from the magnetic sheet A through the punching process is a plurality of through the straight slit 131 and the crack 132 caused therefrom as shown in FIGS. 4 and 7. It can be separated into pieces (P).
  • the plurality of pieces (P) may have different sizes and shapes and may be randomly formed irregularly.
  • a method of manufacturing a magnetic field shielding sheet can remove the shielding sheet 100 from the magnetic sheet A without the need to perform an additional process to separate and form the shielding sheet 100 into a plurality of pieces.
  • a plurality of pieces P are formed separately to simplify the production process.
  • the shielding sheet 100 when the final product, includes a release film 120 attached to at least one side through an adhesive layer 122, punching the shielding sheet 100 from the magnetic sheet A (S2) ) May be performed in the state where the adhesive layer 122 and the release film 120 are attached to the magnetic sheet A.
  • the edge blade 12 may penetrate both the adhesive layer 122 and the release film 120 during the punching process.
  • the shielding sheet 100 is punched to a predetermined size from the magnetic sheet A, and at the same time, a plurality of pieces through the straight slits 131 by the straight blade 14 and the cracks 132 caused therefrom. Even if separated by the field (P), a plurality of pieces (P) separated from each other can be kept separated from each other through the adhesive layer (122).
  • the shielding sheet 100 produced through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention may be formed in a state separated into a plurality of pieces (P). Due to this, the overall resistance of the shielding sheet 100 may be increased, and the loss caused by eddy currents and the Q value may be increased to increase the transmission efficiency of the antenna.
  • the mold 10 may be provided with a plurality of linear blades 14 disposed in the inner region of the edge blades 12.
  • the plurality of straight blades 14 may be spaced apart from each other, and may be arranged not to be connected to each other.
  • the plurality of straight blades 14 may be arranged in various ways.
  • the plurality of straight blades 14 may be arranged radially based on a virtual center point, as shown in FIGS. 6 (a) to 6 (h), and the edge of the edge 12 It may be arranged vertically or parallel to the width direction or the length direction, or may be arranged to be inclined at a predetermined angle with respect to the width direction or the length direction of the edge blade 12.
  • the plurality of straight blades 14 may be in a form in which two of the above three methods are combined with each other.
  • the shielding sheet 100 produced through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention is a mold 10 of various types shown in Figure 6 (a) to Figure 6 (h)
  • a plurality of straight slits 131 formed in the same shape as the plurality of straight blades 14 may be included in the inner region of the shielding sheet 100.
  • the plurality of straight slits 131 formed in the inner region of the shielding sheet 100 may be formed locally at a distance from each other, and may be formed not to be connected to each other. Accordingly, the shielding sheet 100, as described above, the plurality of straight slits 131, the plurality of straight slits 131 and cracks caused by at least one of the edges of the shielding sheet 100, 132 ) Can be separated into a plurality of pieces.
  • a plurality of straight slits 131 including at least one of the first slit 131a, the second slit 131b, and the third slit 131c are provided in the inner region of the shielding sheet 100. It may be formed, the plurality of straight slits 131 may be formed in various ways in the inner region of the shielding sheet 100, as shown in Figure 7 (a) to 7 (h) of FIG.
  • the first slit (131a) may be a straight slit formed in a direction perpendicular to the width or length direction of the shielding sheet 100
  • the second slit (131b) of the shielding sheet 100 It may be a straight slit formed in a direction parallel to the width direction or the length direction.
  • the third slit 131c may be a straight slit formed to be inclined at a predetermined angle with respect to the width direction or the length direction of the shielding sheet 100.
  • the shielding sheet 100 may include a plurality of slits 131 including at least two slits of the first slits 131a, the second slits 131b, and the third slits 131c.
  • the plurality of slits 131 may be formed to be radially disposed based on a virtual center point.
  • the shielding sheet 100 may include a plurality of slits 131 including only one of the first slits 131a, the second slits 131b, and the third slits 131c.
  • the mold 10 may be appropriately changed in the number of straight blades 14 arranged in the inner region of the edge blade 12.
  • the shielding sheet 100 separated from the magnetic sheet A during the punching process may be changed in the total number of straight slits 131 formed in the inner region through the straight blade 14.
  • the shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention is formed of the pieces P separated through the straight slits 131 and the induced cracks 132.
  • the size and number can be adjusted as appropriate.
  • the total number of the linear blades 14 provided in the mold 10 increases, the total number of pieces P constituting the shielding sheet 100 increases while the number of pieces P of each piece P increases. The size can be reduced.
  • the total number of straight blades 14 provided in the mold 10 decreases, the total number of pieces P constituting the shielding sheet 100 decreases, while the total number of pieces P decreases.
  • the size can be large.
  • the shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention is the shielding sheet 100 according to the total number of straight blades 14 provided in the mold 10 ) May be adjusted in size and number of pieces (P) constituting). For this reason, the magnetic permeability of the shielding sheet 100 may be variously changed even though the shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention uses the same manufacturing method.
  • the shielding sheet 100 formed separately from the plurality of pieces P may have a gap between the pieces P. Moreover, when the shielding sheet 100 is separated into a plurality of pieces P through the straight slits 131 formed by the straight blade 14 and the crack 132 caused therefrom, the shielding sheet 100 The surface of the sheet may be uneven. In order to solve this, a separate laminate process may be additionally performed.
  • the shielding sheet 100 formed separately from the plurality of pieces P may be compressed through a lamination process. Through this, a portion of the adhesive layer may permeate into the gap between the pieces P, and a portion of the adhesive layer may fill the gap and simultaneously flatten, slim, and stabilize the shielding sheet 100.
  • the adhesive impregnated into the gaps of the pieces P can surround the pieces P, thereby completely or partially insulating the neighboring pieces P with each other to further reduce losses due to eddy currents. It might be.
  • the magnetic field shielding sheet 100 manufactured through the above-described method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention may be implemented in the form of FIGS. 5 and 8.
  • the magnetic field shielding sheet 100 may be formed separately into a plurality of pieces (P), the plurality of pieces (P) includes at least some of the pieces (P) having different sizes and shapes can do.
  • the magnetic field shielding sheet 100 includes at least one linear slit 131 in which the plurality of pieces P are formed along the thickness direction of the magnetic field shielding sheet 100, the linear slit 131, and a magnetic field. It may be formed through a crack 132 derived from the rim of the shielding sheet 100.
  • the magnetic field shielding sheet 100 may be interposed with an adhesive layer 122 on at least one of the upper and lower surfaces, and the adhesive layer 122 may be coated with adhesive on one or both sides of the base substrate.
  • the magnetic field shielding sheet 100 may include a release film 120 attached to at least one surface of an upper surface and a lower surface via an adhesive layer 122, wherein the magnetic field shielding sheet 100 includes an amorphous alloy and A ribbon sheet including at least one or more of the nanocrystalline alloys may be formed as a single layer or may be composed of multiple layers through an adhesive layer.
  • the magnetic field shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to the above-described exemplary embodiment may be applied to the wireless power receiving apparatus 1000 for wireless power transmission.
  • the wireless power receiving apparatus 1000 at least one wireless power receiving antenna 211 for wireless charging, and one surface of the wireless power receiving antenna 211
  • the magnetic field shielding sheet 100 may be disposed to shield the magnetic field and focus the magnetic field in a desired direction.
  • the wireless power receiving antenna 211 may be an antenna pattern patterned on at least one surface of the circuit board 210, but is not limited thereto, and may also be a flat coil having a conductive member wound multiple times.
  • the magnetic field shielding sheet 100 constituting the wireless power receiver 1000 may be a magnetic field shielding sheet manufactured through the above-described manufacturing method.
  • the magnetic field shielding sheet 100 may be in a state in which the release film 120 attached via the adhesive layer 122 on one surface is removed, and the antenna pattern or circuit board 210 may be the adhesive layer 122 ).
  • the wireless power receiving apparatus 1000 may include an antenna having only the wireless power receiving antenna 211, but may further include various antennas performing different functions.
  • the wireless power receiver 1000 may further include at least one of an MST antenna 212 for magnetic payment and an NFC antenna 213 for short-range communication in addition to the antenna 211 for wireless power reception. .
  • the wireless power receiver 1000 may be applied to portable terminal devices such as mobile phones and tablet PCs.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne un procédé de production d'une feuille de protection contre le champ magnétique. Un procédé de production d'une feuille de protection contre le champ magnétique selon un mode de réalisation donné à titre d'exemple de la présente invention est destiné à produire une feuille de protection contre le champ magnétique séparée en une pluralité de pièces. Ledit procédé comprend les étapes consistant à: préparer une feuille magnétique constituée d'un matériau magnétique et ayant une première zone; découper par poinçonnage une feuille de protection, qui a une seconde zone relativement plus étroite que la première zone, à partir de la feuille magnétique à l'aide d'un moule, de manière à séparer la feuille de protection de la feuille magnétique. Dans l'étape de découpage par poinçonnage de la feuille de protection à partir de la feuille magnétique, au moins une fente linéaire est formée à travers la région interne de la seconde zone au moyen du moule, de sorte que la feuille de protection, tout en étant divisée dans la taille de la seconde zone à partir de la feuille magnétique, peut être séparée en une pluralité de pièces.
PCT/KR2019/011923 2018-09-18 2019-09-16 Procédé de production de feuille de protection contre le champ magnétique, et feuille de protection contre le champ magnétique produite par ce procédé Ceased WO2020060120A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2018-0111616 2018-09-18
KR20180111616 2018-09-18
KR1020180159120A KR102525698B1 (ko) 2018-09-18 2018-12-11 자기장 차폐시트 제조방법 및 이에 의해 제조된 자기장 차폐시트
KR10-2018-0159120 2018-12-11

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WO2020060120A1 true WO2020060120A1 (fr) 2020-03-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101646169B1 (ko) * 2015-09-30 2016-08-09 주식회사 비에스피 자성플레이트와 이것이 구비된 자기장 차폐시트
JP5995137B2 (ja) * 2012-06-15 2016-09-21 日立金属株式会社 磁性シート、コイル部品および磁性シートの製造方法
KR20170051570A (ko) * 2015-10-29 2017-05-12 주식회사 비에스피 자기장 차폐시트의 제조장치와 제조방법
KR20170093029A (ko) * 2016-02-04 2017-08-14 주식회사 아모센스 무선전력 전송모듈용 차폐유닛 및 이를 구비한 무선전력 전송모듈
KR20180102528A (ko) * 2018-09-06 2018-09-17 주식회사 아모센스 자기장 차폐시트 제조방법 및 이에 의해 제조된 자기장 차폐시트

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5995137B2 (ja) * 2012-06-15 2016-09-21 日立金属株式会社 磁性シート、コイル部品および磁性シートの製造方法
KR101646169B1 (ko) * 2015-09-30 2016-08-09 주식회사 비에스피 자성플레이트와 이것이 구비된 자기장 차폐시트
KR20170051570A (ko) * 2015-10-29 2017-05-12 주식회사 비에스피 자기장 차폐시트의 제조장치와 제조방법
KR20170093029A (ko) * 2016-02-04 2017-08-14 주식회사 아모센스 무선전력 전송모듈용 차폐유닛 및 이를 구비한 무선전력 전송모듈
KR20180102528A (ko) * 2018-09-06 2018-09-17 주식회사 아모센스 자기장 차폐시트 제조방법 및 이에 의해 제조된 자기장 차폐시트

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