WO2016111496A1 - Magnetic field shielding sheet and wireless power transmitting module including same - Google Patents

Magnetic field shielding sheet and wireless power transmitting module including same Download PDF

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Publication number
WO2016111496A1
WO2016111496A1 PCT/KR2015/014391 KR2015014391W WO2016111496A1 WO 2016111496 A1 WO2016111496 A1 WO 2016111496A1 KR 2015014391 W KR2015014391 W KR 2015014391W WO 2016111496 A1 WO2016111496 A1 WO 2016111496A1
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WO
WIPO (PCT)
Prior art keywords
sheet
sheet layer
layer
wireless power
magnetic
Prior art date
Application number
PCT/KR2015/014391
Other languages
French (fr)
Korean (ko)
Inventor
장길재
이동훈
장민식
Original Assignee
주식회사 아모센스
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 KR1020150042149A external-priority patent/KR101656260B1/en
Application filed by 주식회사 아모센스 filed Critical 주식회사 아모센스
Priority to CN201580072256.6A priority Critical patent/CN107112811B/en
Priority to US15/541,463 priority patent/US10477743B2/en
Publication of WO2016111496A1 publication Critical patent/WO2016111496A1/en

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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
    • 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
    • H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices

Definitions

  • the present invention relates to a magnetic shielding sheet, and more particularly, when the shielding sheet is made of a magnetic material containing a metal component, it is possible to prevent oxidation of the side exposed to the outside and to prevent detachment of fine pieces from the side. Sheets and a wireless power transmission module comprising the same.
  • RFID Radio Frequency Identification
  • NFC Near Field Communication
  • WPC Wireless Charging
  • Interactive Pen Tablet have been added to mobile terminals including mobile phones and tablet PCs.
  • NFC is an electronic tag, a non-contact short-range communication module that uses the 13.56MHz frequency band and transmits data between terminals at a close distance of 10 cm.
  • NFC is not only mobile payment but also file transfer method, and is widely used in supermarkets or general stores to transmit goods information or travel information for visitors, transportation, and access control lock.
  • Android Beam a smartphone recently announced by Google, has a near field communication (NFC) -based short-range information transmission / reception function, which allows not only mobile payment but also photos, business cards, files, maps, websites, etc. It provides the ability to transfer to a phone.
  • NFC near field communication
  • the mobile terminal is provided with a wireless charging function for wirelessly charging the built-in battery
  • the wireless charging is a wireless power transmission module for supplying power to the wireless power receiving module and the wireless power receiving module built in the mobile terminal. Is made by the module.
  • a portable (combo) antenna unit including a NFC antenna for near field communication and a WPC antenna (or A4WP) antenna for wireless charging of a battery is installed in a portable terminal such as a smartphone.
  • the hybrid antenna unit is a magnetic field applied to generate a magnetic field of 100kHz to several tens of MHz in the process of performing a near field communication with a neighboring portable terminal or performing a wireless charging function to charge a battery.
  • the magnetic field shielding sheet is also laminated by using the first magnetic sheet and the second magnetic sheet to simultaneously satisfy the improvement of short range wireless communication performance and wireless charging performance.
  • the magnetic shielding sheet is exposed to the punching surface during the manufacturing process through the punching process after stacking the first magnetic sheet and the second magnetic sheet.
  • a punching surface is used in a product in a state of being exposed to the outside, a problem arises in that the fine pieces are separated from the punching surface and short the electronic circuit.
  • the salt spray test which is a kind of reliability test, is being strengthened.
  • the present invention has been made in view of the above, and when the shielding sheet is made of a magnetic material containing a metal component, the exposed surface of the shielding sheet is prevented from being oxidized or desorption of fine pieces of the metal component from the exposed surface.
  • An object of the present invention is to provide a magnetic shielding sheet capable of improving reliability and a wireless power transmission module including the same.
  • the present invention provides a magnetic shielding sheet applied to a combo-type antenna unit having at least two antennas using magnetic fields of different frequency bands, and shielding the magnetic field of the first frequency band.
  • a first sheet layer comprising a metal component to focus in the direction of?
  • a second sheet layer shielding the magnetic field of the second frequency band and focusing in a desired direction; It provides a magnetic shielding sheet comprising a; and fine stripping and anti-oxidation member provided on the side of the first sheet layer in order to prevent detachment or oxidation of the fine strip from the side of the first sheet layer.
  • the fine strip detachment and antioxidant member may be a protective film or a coating layer.
  • the first sheet layer may have the same size as the second sheet layer.
  • the fine strip detachment and oxidation prevention member may include a first portion covering the upper surface of the first sheet layer and a second portion extending from the first portion to cover the side surface of the first sheet layer, The second portion may extend to cover the side surface of the second sheet layer.
  • the first sheet layer may have a smaller size than the second sheet layer.
  • the micro scrap detachment and oxidation preventing member is formed from a first portion covering the upper surface of the first sheet layer and a second portion extending from the first portion and covering the side surface of the first sheet layer and the second portion. It may include a third portion extending to cover a portion of the second sheet layer, the upper surface of the second sheet layer is provided with a buffer layer on the outer periphery of the first sheet layer to surround the first sheet layer and The two sheet layer may be provided to match the size of the sum of the first sheet layer and the buffer layer.
  • the buffer layer may be made of nonmagnetic material.
  • the magnetic field of the first frequency band is for wireless power transmission
  • the magnetic field of the second frequency band is for short range communication
  • the first sheet layer is disposed to correspond to the antenna for wireless power transmission
  • the second sheet layer May be disposed to correspond to the antenna for short range communication.
  • the fine strip detachment and antioxidant member is a polymer resin including at least one selected from wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) It may include.
  • first sheet layer and the second sheet layer may be made of a magnetic material having different permeability.
  • first sheet layer is a ribbon sheet including at least one of an amorphous alloy and a nano grain alloy
  • second sheet layer may be a ferrite sheet or a polymer sheet.
  • the first sheet layer may be laminated in multiple layers of a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy
  • the ferrite sheet may be made of Mn-Zn ferrite or Ni-Zn ferrite.
  • first sheet layer and the second sheet layer may be separated into a plurality of fine pieces.
  • the plurality of fine pieces may be entirely insulated or partially insulated between neighboring fine pieces, the plurality of fine pieces may have a size of 1 ⁇ m ⁇ 3mm, the plurality of fine pieces are made of atypical Can be.
  • micro scrap detachment and antioxidant member may be attached via an adhesive including a non-conductive component.
  • the present invention includes an antenna unit including a wireless power transmission antenna and a near field communication antenna; And the above-described shielding sheet disposed on one surface of the antenna unit and focusing in a required direction by shielding a magnetic field generated by the antenna unit.
  • the antenna unit may further include an antenna for MST.
  • the total thickness of the wireless power transmission module may be 0.15 ⁇ 0.6mm.
  • the total thickness of the wireless power transmission module may be 0.3mm.
  • the present invention by providing a fine stripping and anti-oxidation member on the side of the sheet layer exposed to the outside to prevent oxidation through contact with air and / or moisture and to prevent the separation of the fine strip from the side separated It is possible to prevent the short circuit of the internal circuit due to fine fragments.
  • FIG. 1 is a cross-sectional view showing a magnetic shielding sheet according to an embodiment of the present invention
  • 2a to 2d is a view showing a variety of modifications of the fine strip detachment and oxidation prevention member applied to the magnetic shielding sheet according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view showing another form of the first sheet layer in the magnetic shielding sheet according to the embodiment of the present invention.
  • FIG. 4 is a perspective view schematically showing a wireless power transmission module according to an embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of FIG. 4,
  • FIG. 6 is a view schematically showing a state in which the wireless power transmission module according to an embodiment of the present invention is applied to a portable terminal.
  • the wireless power transmission module 100 includes an antenna unit 110, a shielding sheet 120, and a fine stripping and oxidation preventing member 130. Include.
  • the antenna unit 110 includes a portable electronic device such as a mobile phone, a PDA, a PMP, a tablet, a multimedia device, and the like and at least one antenna operating in a predetermined frequency band.
  • a portable electronic device such as a mobile phone, a PDA, a PMP, a tablet, a multimedia device, and the like and at least one antenna operating in a predetermined frequency band.
  • the antenna may be composed only of a circular, oval or square flat coil wound around the clockwise or counterclockwise direction, but is not limited thereto, and a conductor such as a copper foil is looped on at least one surface of the circuit board 112.
  • the pattern may be formed in a shape or may be formed as a loop-shaped metal pattern on the circuit board 112 using conductive ink.
  • the antenna when the antenna is formed in a metal pattern on the circuit board 112, the metal pattern may be formed on one surface of the circuit board or both surfaces.
  • the antenna unit 110 may have one surface of the circuit board 112 having at least one antenna formed in a printed pattern attached to one surface of the shielding sheet 120.
  • the circuit board 112 is a material which is a substrate on which at least one antenna pattern and a circuit portion are formed, and is a material having heat resistance and pressure resistance and having flexibility.
  • a film such as PI or PET, which is a thermosetting polymer film, may be employed as the circuit board 112.
  • the antenna unit 110 may be provided on one surface of the shielding sheet 120, may be provided in plurality, it may be fixed to one surface of the shielding sheet 120 via an adhesive layer.
  • the adhesive layer may be a bond, PVC, rubber or double-sided tape and the like having adhesive properties, and may include a component having conductivity.
  • Such an antenna unit 110 may be configured as a combo type of a plurality of antennas operating in different frequency bands.
  • the antenna unit 110 may include an antenna operating in a first frequency band and an antenna operating in a second frequency band, as shown in FIG. 4.
  • the first frequency band may be 100 to 350 kHz or 6.78 MHz
  • the second frequency band may be 13.56 MHz
  • the antenna operating in the first frequency band is for wireless power transfer. It may be an antenna 114c and the antenna 114a operating in the second frequency band may be an antenna for near field communication.
  • the wireless power transmission antenna 114c serves to wirelessly transmit power by using an inductive coupling method or a magnetic resonance method.
  • the wireless power transmission antenna 114c may also function as a receiving antenna (Rx coil) or a transmitting antenna ( It may also serve as a Tx coil.
  • the wireless power transmission antenna 114c may be a wireless charging antenna for charging a main battery of a portable device through a magnetic induction method or a magnetic resonance method, or wireless power delivered in a magnetic induction method or a magnetic resonance method. It may be a power feeding antenna or a power receiving antenna for transmitting and receiving a signal to use as a driving power source.
  • the antenna is formed in a conductive pattern in a rectangular shape having a fine line width along the periphery of the circuit board 112, and the antenna for wireless power transmission. Since 114c is required to transmit power and uses a lower frequency band than the near field communication antenna 114a, the line 114c may have a line width wider than the line width of the near field communication antenna 114a inside the near field communication antenna 114a.
  • the antenna unit 110 may further include an antenna for magnetic secure transmission (MST) 114b in a region between the near field communication antenna 114a and the wireless power transmission antenna 114c.
  • MST magnetic secure transmission
  • the shielding sheet 120 is made of a plate-like member having a predetermined area, and serves to shield the magnetic field generated by the antenna unit 110 and to focus in the direction of the required.
  • the shielding sheet 120 may include sheet layers 121 and 122 of different types so as to increase the performance of the antenna in response to a plurality of antennas operating in different frequency bands.
  • the shielding sheet 120 shields the magnetic field of the first frequency band, and shields the magnetic field of the first sheet layer 121 and the second frequency band while focusing in the required direction, and also the required direction.
  • the second sheet layer 122 is focused to.
  • the first sheet layer 121 is disposed in an area corresponding to the antenna operating in the first frequency band
  • the second sheet layer 122 is an area corresponding to the antenna operating in the second frequency band. Is placed on.
  • the first sheet layer 121 is to increase the performance of the wireless power transmission antenna 114c operating in the first frequency band, for example, charging efficiency or power transmission efficiency, and the second sheet layer 122 ) Can increase the performance of the near field communication antenna 114a operating in the second frequency band, for example, wireless recognition.
  • the first sheet layer 121 and the second sheet layer 122 may be provided to have different permeability.
  • the first sheet layer 121 may be provided to have a magnetic permeability of 100 to 1000, preferably 900.
  • the permeability of the first sheet layer 121 is not limited thereto, and may be appropriately changed according to design conditions.
  • the first sheet layer 121 may be a ribbon sheet including at least one of an amorphous alloy and a nano grain alloy
  • the second sheet layer 122 may be a polymer sheet or a ferrite sheet.
  • the shielding sheet 120 is configured by stacking a plurality of magnetic sheets having different magnetic permeability and by placing the plurality of magnetic sheets corresponding to the corresponding antennas, thereby increasing the performance of each antenna.
  • the amorphous alloy and the nano-crystalline alloy may be used a Fe-based or Co-based magnetic alloy, it is preferable to use a Fe-based magnetic alloy in consideration of the material cost.
  • the amorphous alloy and the nanocrystalline alloy may include a three-element alloy or a five-element alloy, for example, the three-element alloy includes Fe, Si and B, the five-element alloy is Fe, Si, It may include B, Cu and Nb.
  • the ferrite sheet may be made of a sintered ferrite sheet, and may be made of Mn-Zn ferrite or Ni-Zn ferrite.
  • the ferrite sheet may be made of Ni-Zn sintered ferrite.
  • the polymer sheet may be made of magnetic powder and resin having a high permeability such as amorphous alloy powder, soft magnetic powder, and sand dust.
  • the first sheet layer 121 may be provided to have a relatively smaller size than the second sheet layer 122 disposed below, as shown in FIG. 1.
  • the first sheet layer 121 is provided to have a size including an area of the wireless power transmission antenna 114c disposed inside the short range communication antenna 114a. Accordingly, by covering the entire area of the wireless power transmission antenna 114c through the first sheet layer 121, it is possible to effectively improve the performance of the wireless power transmission antenna.
  • the first sheet layer 121 for improving the performance of the wireless power transmission antenna 114c is not disposed directly above the short range communication antenna 114a, the first sheet layer 121 is near. This is to prevent affecting the performance of the communication antenna 114a.
  • the first sheet layer 121 is provided to have an area that does not exceed an inner region of the near field communication antenna 114a.
  • the first sheet layer 121 is provided to have an appropriate area including an inner region of the near field communication antenna 114a but not including an area directly above the near field antenna 114a.
  • the first sheet layer 121 may be provided to have a size including an upper region of the MST antenna 114b. Note that it may be provided to have a size that does not include the area directly above the antenna (114b).
  • the buffer layer 136 is disposed to surround the outer periphery of the first sheet layer 121 Can be.
  • the combined size of the first sheet layer 121 and the buffer layer 136 may be provided to match the size of the second sheet layer 122 (see FIG. 2C).
  • the buffer layer 136 when the buffer layer 136 is disposed to surround the side of the first sheet layer 121, the buffer layer 136 may be formed of a nonmagnetic material so as not to affect the performance of the near field communication antenna 114a disposed below. Note that the same material as the second sheet layer 122 may be used to increase the performance of the near field communication antenna 114a.
  • first sheet layer 121 ′ may be provided to have the same size as the second sheet layer 122 for convenience of manufacture (see FIGS. 2A and 2B).
  • the same size means that the width and the length excluding the thickness have the same value, or the radius except the thickness has the same value, and the cross-sectional areas facing each other are the same.
  • the first sheet layer (121, 121 ′) is a thin ribbon sheet (121a, 121b, 121c) containing at least one of a plurality of amorphous alloys and nano-crystalline alloy may be revealed that may be composed of a multilayer (Fig. 3).
  • the bonding member 121d is interposed between the ribbon sheets to form a multilayer.
  • the ribbon sheet of the will be integrated.
  • the bonding member 121d may include a non-conductive component, and the bonding member 121d may be provided as or may be provided in a form in which is applied to one or both surfaces of the substrate provided in a film form. .
  • the first sheet layers 121 and 121 'for improving the performance of the wireless power transmission antenna operating in the first frequency band are flake-processed to reduce the generation of eddy currents by increasing the overall resistance and separating the plurality of fine pieces into pieces.
  • the plurality of fine pieces may be entirely insulated or partially insulated from neighboring fine pieces, and each of the fine pieces may be irregularly random.
  • the fine pieces may have a size of 1 ⁇ m ⁇ 3mm.
  • the ribbon sheet is flake-treated after heat treatment to be separated into a plurality of fine pieces.
  • the plurality of microflakes may be entirely insulated or partially insulated from neighboring fine pieces.
  • each of the fine pieces may be provided with a size of 1 ⁇ m ⁇ 3mm, each of the fine pieces may be randomly formed in a shape irregular.
  • each ribbon sheet may be integrated into a multilayer through the bonding member.
  • the bonding member may include a non-conductive component.
  • first sheet layers 121 and 121 are not limited to the above-mentioned types, and any materials having magnetic properties may be used.
  • the second sheet layer 122 for improving the performance of the short-range communication antenna operating in the second frequency band may also be formed into a plurality of pieces by being flaked.
  • the second sheet layer 122 is formed of a brittle ferrite sheet, the ferrite sheet is separated into a plurality of fine pieces, thereby increasing the flexibility of the sheet itself and changing the characteristics of the sheet itself due to cracking and separation. It can be minimized.
  • the fine strip detachment and oxidation preventing members 130, 130 ', 130 ", 230 are provided on the exposed surface of the magnetic shielding sheet according to the present invention so that at least some of the exposed surfaces of the shielding sheet are not exposed to the outside.
  • the fine strip detachment and oxidation prevention member (130,130 ', 130 ", 230) is a case where the shielding sheet is made of a magnetic material containing a metal component to prevent the side of the shielding sheet corresponding to the punching surface to be exposed to the outside And / or to prevent oxidation through contact with moisture and to prevent detachment of fine pieces of metal from the side surface, thereby improving product reliability.
  • the first sheet layers 121 and 121 ' are made of a magnetic material containing a metal component, such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy
  • the side surfaces of the first sheet layers 121 and 121' are formed. Becomes the punching surface formed by the punching process in the manufacturing process. Accordingly, when the fine pieces of the metal component such as ribbon pieces fall off from the punching surface, the separated fine pieces generate a short in the electronic circuit.
  • the first sheet layers 121 and 121 ' are made of a magnetic material containing a metal component, such as a ribbon sheet containing at least one of an amorphous alloy and a nanocrystalline alloy, the first sheet layers 121 and 121 corresponding to the punched surface
  • the fine stripping and anti-oxidation members 130, 130 ', 130 ", 230 are provided to surround the side surface of the " To prevent them from being separated from the side surfaces of the first sheet layers 121 and 121 ', which are punched surfaces.
  • the first sheet layers 121 and 121 ' are made of a material containing a metal component, such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy, fine pieces of the metal component are detached from the side surface.
  • a metal component such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy
  • the adhesive 134 that is applied to at least one surface of the micro scrap detachment and oxidation preventing members 130, 130 ′, 130 ′′, 230 may include fine pieces separated from the side surfaces of the first sheet layers 121 and 121 ′ on the punching surface. It may be provided with an adhesive including a non-conductive component to be kept in the bonded state.
  • the fine strip detachment and oxidation preventing members 130, 130 ', 130 ", 230 may be provided in the form of a sheet of a protective film, the liquid or gel-like coating layer through the dipping, spraying, printing, etc., the first sheet layer It may be provided in the form applied to the side of (121,121 ').
  • the fine stripping and anti-oxidation member (130,130 ', 130 ", 230) is a wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) It may be a polymer resin containing at least one selected.
  • the protective film is polyethylene terephthalate (PET) film, polypropylene (PP) film, polyterephthalate Fluorine resin films such as (PTFE) may be used.
  • the fine stripping and oxidation preventing members 130, 130 ′ and 130 ′′ include a second portion 132 covering at least the side surfaces of the first sheet layers 121 and 121 ′ as shown in FIGS. 1 and 2.
  • a first portion 131 covering the upper surfaces of the first sheet layers 121 and 121 ′ may be included for convenience of manufacturing and increase of adhesiveness.
  • the fine strip detachment and oxidation preventing member 230 may be provided so as to cover only the side surface of the first sheet layer 121, as shown in Figure 2d.
  • the fine stripping and anti-oxidation member 130 may be formed as shown in FIGS. 1 and 2C. It may include a third portion 133 extending from the portion 132 to cover the top surface of the second sheet layer 122.
  • the third portion 133 extends from the second portion 132 covering the side surface of the first sheet layer 121 to the upper surface of the second sheet layer 122, thereby preventing fine stripping and oxidation.
  • the member 130 is provided in the form of a protective film, it is possible to increase the adhesive force of the protective film by increasing the adhesive area.
  • the fine flake stripping and oxidation preventing member 130 ′′ is formed as shown in FIG. 2B. It may extend from the second portion 132 to cover the side of the sheet layer 122.
  • the extended portion extending from the second portion 132 has a lower portion of the second sheet layer 122 so as to increase the adhesion of the fine flake stripping and oxidation preventing member 130 ′′ by increasing the adhesion area. It may extend to cover part of the face.
  • the buffer layer 136 when the buffer layer 136 is disposed on the side of the first sheet layer 121, the second portion 132 and the third portion 133 of the fine stripping and oxidation preventing member 130 may be formed on both surfaces thereof.
  • An adhesive 134 may be applied to fix the buffer layer 136 through the adhesive.
  • the fine stripping and oxidation preventing members 130, 130 'and 130 " are provided on the side and / or top surfaces of the first sheet layer 121 and / or the second sheet layer 122.
  • the present invention is not limited thereto, and it may be provided to cover only the side surfaces of the first sheet layer 121 and the second sheet layer 122 at the same time.
  • 130, 130 ′, 130 ′′, 230 may be applied to all exposed surfaces of the shield sheets 120, 120 ′ 120 ′′, 220 exposed to the outside in the process of applying the shield sheets 120, 120 ′ 120 ′′, 220 to the product. Put it.
  • both the first sheet layer 121 and the second sheet layer 122 are made of a magnetic material including a metal component
  • the fine stripping and oxidation preventing members 130, 130 ′, 130 ′′ may be exposed to the outside. It is preferable to arrange
  • a separate cover film 140 may be provided on a lower surface of the second sheet layer 122 in which the micro scrap detachment and oxidation preventing members 130, 130 ′, 130 ′′, and 230 are not disposed.
  • the wireless power transmission module 100 can be manufactured to a thickness of 0.15 ⁇ 0.6mm, and can also be used as a thickness of 0.3mm in accordance with the needs of light and thin shortening of electronic devices such as portable terminals. Put it.
  • the entire thickness of the wireless power transmission module 100 is illustrated as 0.15 ⁇ 0.6mm, it should be understood that the overall thickness of the wireless power transmission module has a thin thickness, the total thickness of the wireless power transmission module Note that it is not limiting.
  • the antenna unit 110 is shown to be attached to one surface of the second sheet layer 122 of the shielding sheet, but is not limited thereto, and may be attached to one surface of the first sheet layers 121 and 121 '. To reveal.
  • Such a wireless power transmission module 100 can be installed inside the rear case or the back cover 92 of the mobile terminal 90, as shown in Figure 6, It may be installed in a case that is combined separately.

Abstract

A magnetic field shielding sheet and a wireless power transmitting module that includes the same are provided. The magnetic field shielding sheet, according to an exemplary embodiment of the present invention, which is applied to a combo-type antenna unit that includes at least two antennas using different frequency bands of magnetic fields, comprises: a first sheet layer that includes a metal component that shields a first frequency band of a magnetic field and concentrates the same in a predetermined direction; a second sheet layer that shields a second frequency band of a magnetic field and concentrates the same in a predetermined direction; and a micro-piece detachment and oxidation preventing member provided on a side surface of the first sheet layer in order to prevent a micro-piece from being detached from the side surface of the first sheet or to prevent the side surface from being oxidized. According to the present invention, by virtue of the micro-piece detachment and oxidation preventing member provided on the side surface of the first sheet layer, it is possible to prevent the side surface from being oxidized and to prevent short-circuiting due to particles.

Description

자기장 차폐시트 및 이를 포함하는 무선전력 전송모듈Magnetic shielding sheet and wireless power transmission module including the same
본 발명은 자기장 차폐시트에 관한 것이며, 보다 구체적으로는 차폐시트가 금속성분을 포함하는 자성체로 이루어지는 경우 외부로 노출되는 측면의 산화를 방지하고 측면으로부터 미세조각이 탈리되는 것을 방지할 수 있는 자기장 차폐시트 및 이를 포함하는 무선전력 전송모듈에 관한 것이다.The present invention relates to a magnetic shielding sheet, and more particularly, when the shielding sheet is made of a magnetic material containing a metal component, it is possible to prevent oxidation of the side exposed to the outside and to prevent detachment of fine pieces from the side. Sheets and a wireless power transmission module comprising the same.
최근 휴대폰, 타블렛 PC 등을 비롯한 휴대 단말기에 RFID(Radio Frequency Identification: 무선식별), 근거리 통신(NFC), 무선충전(WPC), 대화형 펜 타블렛 등 다양한 기능이 추가되고 있다.Recently, various functions such as RFID (Radio Frequency Identification), Near Field Communication (NFC), Wireless Charging (WPC), and Interactive Pen Tablet have been added to mobile terminals including mobile phones and tablet PCs.
NFC는 전자태그인 RFID의 하나로 13.56MHz 주파수 대역을 사용하는 비접촉식 근거리 통신 모듈로 10cm의 가까운 거리에서 단말기 간 데이터를 전송하는 기술을 말한다. NFC는 모바일 결제뿐만 아니라 파일 전송방식으로 슈퍼마켓이나 일반 상점에서 물품 정보나 방문객을 위한 여행 정보 전송, 교통, 출입통제 잠금장치 등에 광범위하게 활용된다.NFC is an electronic tag, a non-contact short-range communication module that uses the 13.56MHz frequency band and transmits data between terminals at a close distance of 10 cm. NFC is not only mobile payment but also file transfer method, and is widely used in supermarkets or general stores to transmit goods information or travel information for visitors, transportation, and access control lock.
또한, 최근 구글이 발표한 스마트폰에 구비된 ‘안드로이드 빔’에는 근거리 통신(NFC) 기반의 근거리 정보 송수신 기능으로서, 모바일 결제뿐만 아니라 사진·명함·파일·지도·웹사이트 등을 한 전화기에서 다른 전화기로 전달하는 기능을 제공하고 있다.In addition, Android Beam, a smartphone recently announced by Google, has a near field communication (NFC) -based short-range information transmission / reception function, which allows not only mobile payment but also photos, business cards, files, maps, websites, etc. It provides the ability to transfer to a phone.
더불어, 휴대 단말기에는 내장된 배터리를 무선으로 충전하기 위한 무선 충전 기능이 구비되고 있는데, 이러한 무선 충전은 휴대 단말기에 내장되는 무선 전력 수신 모듈과, 상기 무선 전력 수신 모듈에 전력을 공급하는 무선 전력 송신 모듈에 의해 이루어진다.In addition, the mobile terminal is provided with a wireless charging function for wirelessly charging the built-in battery, the wireless charging is a wireless power transmission module for supplying power to the wireless power receiving module and the wireless power receiving module built in the mobile terminal. Is made by the module.
최근, 스마트폰 등과 같은 휴대 단말기에는 근거리 통신을 위한 NFC용 안테나와 배터리의 무선충전을 위한 WPC용(또는 A4WP용) 안테나를 포함하는 하이브리드형(콤보형) 안테나유닛이 설치되고 있다.Recently, a portable (combo) antenna unit including a NFC antenna for near field communication and a WPC antenna (or A4WP) antenna for wireless charging of a battery is installed in a portable terminal such as a smartphone.
이러한 하이브리드형 안테나유닛은 자기장을 응용한 것으로 인접한 휴대 단말기와 근거리 통신을 수행하거나 배터리를 충전하기 위해 무선 충전기능을 수행하는 과정에서 100kHz ~ 수십 MHz의 자기장이 발생한다.The hybrid antenna unit is a magnetic field applied to generate a magnetic field of 100kHz to several tens of MHz in the process of performing a near field communication with a neighboring portable terminal or performing a wireless charging function to charge a battery.
이에 따라, 하이브리드형 안테나유닛이 채용되는 무선전력 전송모듈에서는 자기장 차폐시트도 제1자성시트 및 제2자성시트를 적층하여 사용함으로써 근거리 무선 통신 성능과 무선 충전 성능의 향상을 동시에 만족하도록 하고 있다.Accordingly, in the wireless power transmission module employing the hybrid antenna unit, the magnetic field shielding sheet is also laminated by using the first magnetic sheet and the second magnetic sheet to simultaneously satisfy the improvement of short range wireless communication performance and wireless charging performance.
이러한 자기장 차폐시트는 제1자성시트와 제2자성시트를 적층한 후 타발공정을 통해 제조하는 과정에서 타발면이 노출된다. 이와 같은 타발면이 외부로 노출된 상태로 제품에 사용하게 되는 경우 상기 타발면으로부터 미세 조각들이 분리되어 전자회로를 쇼트시키는 문제가 발생한다.The magnetic shielding sheet is exposed to the punching surface during the manufacturing process through the punching process after stacking the first magnetic sheet and the second magnetic sheet. When such a punching surface is used in a product in a state of being exposed to the outside, a problem arises in that the fine pieces are separated from the punching surface and short the electronic circuit.
한편, 현재 휴대 단말기 등의 전자제품은 신뢰성을 테스트하기 위하여 신뢰성 테스트의 일종인 염수분무시험이 강화되고 있다.Meanwhile, in order to test the reliability of electronic products such as portable terminals, the salt spray test, which is a kind of reliability test, is being strengthened.
이에 따라, 상기 차폐시트를 금속성분을 포함하는 자성체를 사용하는 경우, 신뢰성 테스트시 수분 등의 침투에 의해 노출면이 산화되어 신뢰성 테스트를 통과하지 못하는 문제가 있다.Accordingly, in the case of using a magnetic material containing a metal component as the shielding sheet, there is a problem that the exposed surface is oxidized by penetration of moisture or the like during the reliability test and thus does not pass the reliability test.
본 발명은 상기와 같은 점을 감안하여 안출한 것으로, 차폐시트가 금속성분을 포함하는 자성체로 이루어지는 경우 차폐시트의 노출면이 산화되거나 노출면으로부터 금속성분의 미세조각이 탈리되는 것을 방지하여 제품의 신뢰성을 향상시킬 수 있는 자기장 차폐시트 및 이를 포함하는 무선전력 전송모듈을 제공하는 데 그 목적이 있다.The present invention has been made in view of the above, and when the shielding sheet is made of a magnetic material containing a metal component, the exposed surface of the shielding sheet is prevented from being oxidized or desorption of fine pieces of the metal component from the exposed surface. An object of the present invention is to provide a magnetic shielding sheet capable of improving reliability and a wireless power transmission module including the same.
상술한 목적을 달성하기 위하여 본 발명은 서로 다른 주파수 대역의 자기장을 이용하는 적어도 두 개의 안테나를 구비하는 콤보형 안테나유닛에 적용되는 자기장 차폐시트에 있어서, 제1주파수 대역의 자기장을 차폐함과 아울러 소요의 방향으로 집속시키는 금속 성분을 포함하는 제1시트층; 제2주파수 대역의 자기장을 차폐함과 아울러 소요의 방향으로 집속시키는 제2시트층; 및 상기 제1시트층의 측면으로부터 미세조각이 탈리되거나 상기 측면이 산화되는 것을 방지하기 위하여 상기 제1시트층의 측면에 구비되는 미세조각 탈리 및 산화 방지부재;를 포함하는 자기장 차폐시트를 제공한다.In order to achieve the above object, the present invention provides a magnetic shielding sheet applied to a combo-type antenna unit having at least two antennas using magnetic fields of different frequency bands, and shielding the magnetic field of the first frequency band. A first sheet layer comprising a metal component to focus in the direction of? A second sheet layer shielding the magnetic field of the second frequency band and focusing in a desired direction; It provides a magnetic shielding sheet comprising a; and fine stripping and anti-oxidation member provided on the side of the first sheet layer in order to prevent detachment or oxidation of the fine strip from the side of the first sheet layer. .
또한, 상기 미세조각 탈리 및 산화 방지부재는 보호필름이거나 코팅층일 수 있다.In addition, the fine strip detachment and antioxidant member may be a protective film or a coating layer.
또한, 상기 제1시트층은 상기 제2시트층과 동일한 크기를 가질 수 있다. 이때, 상기 미세조각 탈리 및 산화 방지부재는 상기 제1시트층의 상부면을 덮는 제1부분과 상기 제1부분으로부터 연장되어 상기 제1시트층의 측면을 덮는 제2부분을 포함할 수 있으며, 상기 제2부분은 상기 제2시트층의 측면을 덮도록 연장될 수 있다.In addition, the first sheet layer may have the same size as the second sheet layer. In this case, the fine strip detachment and oxidation prevention member may include a first portion covering the upper surface of the first sheet layer and a second portion extending from the first portion to cover the side surface of the first sheet layer, The second portion may extend to cover the side surface of the second sheet layer.
또한, 상기 제1시트층은 상기 제2시트층보다 더 작은 크기를 가질 수 있다. 이때, 상기 미세조각 탈리 및 산화 방지부재는 상기 제1시트층의 상부면을 덮는 제1부분과 상기 제1부분으로부터 연장되어 상기 제1시트층의 측면을 덮는 제2부분 및 상기 제2부분으로부터 연장되어 상기 제2시트층의 일부를 덮는 제3부분을 포함할 수 있으며, 상기 제2시트층의 상부면에는 상기 제1시트층을 둘러싸도록 제1시트층의 외곽에 버퍼층이 구비되고 상기 제2시트층은 상기 제1시트층과 버퍼층을 합한 크기과 일치하도록 구비될 수 있다. 여기서, 상기 버퍼층은 비자성체로 이루어질 수 있다.In addition, the first sheet layer may have a smaller size than the second sheet layer. At this time, the micro scrap detachment and oxidation preventing member is formed from a first portion covering the upper surface of the first sheet layer and a second portion extending from the first portion and covering the side surface of the first sheet layer and the second portion. It may include a third portion extending to cover a portion of the second sheet layer, the upper surface of the second sheet layer is provided with a buffer layer on the outer periphery of the first sheet layer to surround the first sheet layer and The two sheet layer may be provided to match the size of the sum of the first sheet layer and the buffer layer. Here, the buffer layer may be made of nonmagnetic material.
또한, 상기 제1주파수 대역의 자기장은 무선전력전송용이고, 상기 제2주파수 대역의 자기장은 근거리 통신용이며, 상기 제1시트층은 무선전력전송용 안테나에 대응되게 배치되고, 상기 제2시트층은 근거리 통신용 안테나에 대응되게 배치될 수 있다.In addition, the magnetic field of the first frequency band is for wireless power transmission, the magnetic field of the second frequency band is for short range communication, and the first sheet layer is disposed to correspond to the antenna for wireless power transmission, and the second sheet layer May be disposed to correspond to the antenna for short range communication.
또한, 상기 미세조각 탈리 및 산화 방지부재는 왁스, 에폭시 수지, 멜라닌 수지, 실리콘 수지, 아크릴 수지, 에틸렌 프로필렌고무 수지(EPDM) 및 폴리비닐 알콜 수지(PVA) 중에서 선택된 1종 이상을 포함하는 고분자 수지를 포함할 수 있다.In addition, the fine strip detachment and antioxidant member is a polymer resin including at least one selected from wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) It may include.
또한, 상기 제1시트층과 제2시트층은 서로 다른 투자율을 갖는 자성체로 이루어질 수 있다. 바람직하게는, 상기 제1시트층은 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 리본시트이고 상기 제2시트층은 페라이트 시트 또는 폴리머 시트일 수 있다.In addition, the first sheet layer and the second sheet layer may be made of a magnetic material having different permeability. Preferably, the first sheet layer is a ribbon sheet including at least one of an amorphous alloy and a nano grain alloy, and the second sheet layer may be a ferrite sheet or a polymer sheet.
또한, 상기 제1시트층은 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 리본시트가 다층으로 적층될 수 있으며, 상기 페라이트 시트는 Mn-Zn 페라이트 또는 Ni-Zn 페라이트로 이루어질 수 있다.In addition, the first sheet layer may be laminated in multiple layers of a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy, the ferrite sheet may be made of Mn-Zn ferrite or Ni-Zn ferrite.
또한, 상기 제1시트층 및 제2시트층 중 적어도 하나 또는 둘 다는 복수 개의 미세 조각으로 분리형성될 수 있다.In addition, at least one or both of the first sheet layer and the second sheet layer may be separated into a plurality of fine pieces.
또한, 상기 복수 개의 미세 조각들은 서로 이웃하는 미세 조각들 간에 전체적으로 절연되거나 부분적으로 절연될 수 있고, 상기 복수 개의 미세 조각은 1㎛ ~ 3mm의 크기일 수 있으며, 상기 복수 개의 미세 조각은 비정형으로 이루어질 수 있다.In addition, the plurality of fine pieces may be entirely insulated or partially insulated between neighboring fine pieces, the plurality of fine pieces may have a size of 1㎛ ~ 3mm, the plurality of fine pieces are made of atypical Can be.
또한, 상기 미세조각 탈리 및 산화 방지부재는 비전도성 성분을 포함하는 접착제를 매개로 부착될 수 있다.In addition, the micro scrap detachment and antioxidant member may be attached via an adhesive including a non-conductive component.
한편, 본 발명은 무선전력전송용 안테나 및 근거리 통신용 안테나를 포함하는 안테나유닛; 및 상기 안테나유닛의 일면에 배치되고 상기 안테나유닛에서 발생되는 자기장을 차폐하여 소요의 방향으로 집속하는 상술한 차폐시트;를 포함하는 무선전력 전송모듈을 제공한다.On the other hand, the present invention includes an antenna unit including a wireless power transmission antenna and a near field communication antenna; And the above-described shielding sheet disposed on one surface of the antenna unit and focusing in a required direction by shielding a magnetic field generated by the antenna unit.
또한, 상기 안테나유닛은 MST용 안테나를 더 포함할 수 있다.In addition, the antenna unit may further include an antenna for MST.
또한, 상기 무선전력 전송모듈의 총두께가 0.15 ~ 0.6mm일 수 있다.In addition, the total thickness of the wireless power transmission module may be 0.15 ~ 0.6mm.
이때, 상기 무선전력 전송모듈의 총두께가 0.3mm일 수 있다.At this time, the total thickness of the wireless power transmission module may be 0.3mm.
한편, 상술한 무선전력 전송모듈이 구비되는 휴대 단말기를 제공한다.On the other hand, it provides a portable terminal provided with the above-described wireless power transmission module.
본 발명에 의하면, 외부로 노출되는 시트층의 측면에 미세조각 탈리 및 산화 방지부재가 구비됨으로써 공기 및/또는 수분과의 접촉을 통한 산화를 방지하고 측면으로부터 미세조각이 분리되는 것을 방지하여 분리된 미세조각에 의한 내부회로의 쇼트를 방지할 수 있다.According to the present invention, by providing a fine stripping and anti-oxidation member on the side of the sheet layer exposed to the outside to prevent oxidation through contact with air and / or moisture and to prevent the separation of the fine strip from the side separated It is possible to prevent the short circuit of the internal circuit due to fine fragments.
도 1은 본 발명의 일 실시예에 따른 자기장 차폐시트를 나타낸 단면도,1 is a cross-sectional view showing a magnetic shielding sheet according to an embodiment of the present invention;
도 2a 내지 도 2d는 본 발명의 일 실시예에 따른 자기장 차폐시트에 적용되는 미세조각 탈리 및 산화 방지부재의 다양한 변형예를 나타낸 도면,2a to 2d is a view showing a variety of modifications of the fine strip detachment and oxidation prevention member applied to the magnetic shielding sheet according to an embodiment of the present invention,
도 3은 본 발명의 일실시예에 따른 자기장 차폐시트에서 제1시트층의 다른 형태를 나타낸 단면도,3 is a cross-sectional view showing another form of the first sheet layer in the magnetic shielding sheet according to the embodiment of the present invention;
도 4는 본 발명의 일 실시예에 따른 무선전력 전송모듈을 개략적으로 나타낸 사시도,4 is a perspective view schematically showing a wireless power transmission module according to an embodiment of the present invention;
도 5는 도 4의 단면도, 그리고5 is a cross-sectional view of FIG. 4, and
도 6은 본 발명의 일 실시예에 따른 무선전력 전송모듈이 휴대단말기에 적용된 상태를 개략적으로 나타낸 도면이다.6 is a view schematically showing a state in which the wireless power transmission module according to an embodiment of the present invention is applied to a portable terminal.
이하, 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 동일 또는 유사한 구성요소에 대해서는 동일한 참조부호를 부가한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.
먼저, 도 4 및 도 5를 참고하면, 본 발명의 일 실시예에 따른 무선전력 전송모듈(100)은 안테나유닛(110), 차폐시트(120) 및 미세조각 탈리 및 산화 방지부재(130)를 포함한다.First, referring to FIGS. 4 and 5, the wireless power transmission module 100 according to an embodiment of the present invention includes an antenna unit 110, a shielding sheet 120, and a fine stripping and oxidation preventing member 130. Include.
상기 안테나 유닛(110)은 휴대폰, PDA, PMP, 테블릿, 멀티미디어 기기 등과 같은 휴대용 전자기기와 소정의 주파수 대역에서 작동하는 적어도 하나의 안테나를 포함한다.The antenna unit 110 includes a portable electronic device such as a mobile phone, a PDA, a PMP, a tablet, a multimedia device, and the like and at least one antenna operating in a predetermined frequency band.
여기서, 상기 안테나는 시계방향 또는 반시계 방향으로 권선되는 원형, 타원형 또는 사각형상의 평판형 코일로만 구성될 수도 있으나, 이를 한정하는 것은 아니며, 회로기판(112)의 적어도 일면에 동박 등과 같은 전도체를 루프 형태로 패터닝하거나 전도성 잉크를 사용하여 회로기판(112)에 루프 형상의 금속 패턴으로 형성될 수도 있다.Here, the antenna may be composed only of a circular, oval or square flat coil wound around the clockwise or counterclockwise direction, but is not limited thereto, and a conductor such as a copper foil is looped on at least one surface of the circuit board 112. The pattern may be formed in a shape or may be formed as a loop-shaped metal pattern on the circuit board 112 using conductive ink.
이때, 상기 안테나가 회로기판(112)에 금속 패턴으로 형성되는 경우 상기 금속 패턴은 회로기판의 일면에 형성될 수도 있고 양면에 형성될 수도 있다. 더불어, 상기 안테나유닛(110)은 적어도 하나의 안테나가 인쇄패턴으로 형성된 회로기판(112)의 일면이 상기 차폐시트(120)의 일면에 부착될 수 있다.In this case, when the antenna is formed in a metal pattern on the circuit board 112, the metal pattern may be formed on one surface of the circuit board or both surfaces. In addition, the antenna unit 110 may have one surface of the circuit board 112 having at least one antenna formed in a printed pattern attached to one surface of the shielding sheet 120.
여기서, 상기 회로기판(112)은 그 상면에 적어도 하나의 안테나패턴과 회로부가 형성되는 기재가 되는 요소로서, 내열성 및 내압성을 가지며, 가요성(flexible)을 갖는 소재이다. 이러한 소재의 물성을 고려할 때, 상기 회로기판(112)으로서 열경화성 고분자 필름인 PI나 PET 등과 같은 필름이 채용될 수 있다.Here, the circuit board 112 is a material which is a substrate on which at least one antenna pattern and a circuit portion are formed, and is a material having heat resistance and pressure resistance and having flexibility. In consideration of the physical properties of such a material, a film such as PI or PET, which is a thermosetting polymer film, may be employed as the circuit board 112.
한편, 상기 안테나유닛(110)은 상기 차폐시트(120)의 일면에 하나로 구비될 수도 있고, 복수 개로 구비될 수 있으며, 상기 차폐시트(120)의 일면에 접착층을 매개로 고정될 수 있다.On the other hand, the antenna unit 110 may be provided on one surface of the shielding sheet 120, may be provided in plurality, it may be fixed to one surface of the shielding sheet 120 via an adhesive layer.
여기서, 상기 접착층은 접착 성질을 갖는 본드, PVC, 고무 또는 양면 테이프 등일 수 있으며, 전도성을 갖는 성분이 포함될 수도 있다. Here, the adhesive layer may be a bond, PVC, rubber or double-sided tape and the like having adhesive properties, and may include a component having conductivity.
이와 같은 안테나유닛(110)은 서로 다른 주파수 대역에서 작동하는 복수 개의 안테나가 콤보형으로 구성될 수 있다.Such an antenna unit 110 may be configured as a combo type of a plurality of antennas operating in different frequency bands.
즉, 상기 안테나유닛(110)은 도 4에 도시된 바와 같이 제1주파수 대역에서 작동하는 안테나와 제2주파수 대역에서 작동하는 안테나를 포함할 수 있다.That is, the antenna unit 110 may include an antenna operating in a first frequency band and an antenna operating in a second frequency band, as shown in FIG. 4.
일례로, 상기 제1주파수 대역은 100~350kHz 또는 6.78MHz일 수 있고, 상기 제2주파수 대역은 13.56MHz일 수 있으며, 상기 제1주파수 대역에서 작동하는 안테나는 무선전력전송(wireless power transfer)용 안테나(114c)일 수 있고 상기 제2주파수 대역에서 작동하는 안테나(114a)는 근거리 통신(near field communication)용 안테나일 수 있다.For example, the first frequency band may be 100 to 350 kHz or 6.78 MHz, the second frequency band may be 13.56 MHz, and the antenna operating in the first frequency band is for wireless power transfer. It may be an antenna 114c and the antenna 114a operating in the second frequency band may be an antenna for near field communication.
여기서, 상기 무선전력전송용 안테나(114c)는 유도 결합 방식 또는 자기 공진 방식을 이용하여 무선으로 전력을 전달하는 역할을 수행하는 것으로, 수신 안테나(Rx coil)의 역할을 수행할 수도 있고 송신 안테나(Tx coil)의 역할을 수행할 수도 있다.Here, the wireless power transmission antenna 114c serves to wirelessly transmit power by using an inductive coupling method or a magnetic resonance method. The wireless power transmission antenna 114c may also function as a receiving antenna (Rx coil) or a transmitting antenna ( It may also serve as a Tx coil.
더불어, 상기 무선전력전송용 안테나(114c)는 자기유도방식 또는 자기공진방식을 통하여 휴대기기의 메인배터리를 충전하기 위한 무선충전용 안테나일 수도 있고, 자기유도방식 또는 자기공진방식으로 전달되는 무선전력을 송,수신하여 구동전원으로 사용하기 위한 급전용 안테나 또는 수전용 안테나일 수도 있다.In addition, the wireless power transmission antenna 114c may be a wireless charging antenna for charging a main battery of a portable device through a magnetic induction method or a magnetic resonance method, or wireless power delivered in a magnetic induction method or a magnetic resonance method. It may be a power feeding antenna or a power receiving antenna for transmitting and receiving a signal to use as a driving power source.
이때, 상기 근거리 통신용 안테나(114a)는 무선전력전송용 안테나(114c) 보다 주파수 대역이 높기 때문에 회로기판(112)의 외곽을 따라 미세한 선폭의 직사각형 형태로 도전성 패턴으로 형성되고, 무선전력전송용 안테나(114c)는 전력 전송이 요구되며 근거리 통신용 안테나(114a)보다 낮은 주파수 대역을 사용하므로 근거리 통신용 안테나(114a)의 내측에 근거리 통신용 안테나(114a)의 선폭보다 넓은 선폭으로 형성될 수 있다.At this time, since the near field communication antenna 114a has a higher frequency band than the wireless power transmission antenna 114c, the antenna is formed in a conductive pattern in a rectangular shape having a fine line width along the periphery of the circuit board 112, and the antenna for wireless power transmission. Since 114c is required to transmit power and uses a lower frequency band than the near field communication antenna 114a, the line 114c may have a line width wider than the line width of the near field communication antenna 114a inside the near field communication antenna 114a.
더불어, 상기 안테나유닛(110)은 상기 근거리 통신용 안테나(114a) 및 무선전력전송용 안테나(114c)의 사이 영역에 MST(magnetic secure transmission)용 안테나(114b)가 추가로 포함될 수 있다.In addition, the antenna unit 110 may further include an antenna for magnetic secure transmission (MST) 114b in a region between the near field communication antenna 114a and the wireless power transmission antenna 114c.
상기 차폐시트(120)는 일정면적을 갖는 판상의 부재로 이루어지며, 상기 안테나유닛(110)에서 발생되는 자기장을 차폐함과 아울러 소요의 방향으로 집속하는 역할을 수행한다.The shielding sheet 120 is made of a plate-like member having a predetermined area, and serves to shield the magnetic field generated by the antenna unit 110 and to focus in the direction of the required.
이때, 상기 차폐시트(120)는 서로 다른 주파수 대역에서 작동하는 복수 개의 안테나에 대응하여 해당 안테나의 성능을 높여줄 수 있도록 서로 다른 종류의 시트층(121,122)을 포함할 수 있다.In this case, the shielding sheet 120 may include sheet layers 121 and 122 of different types so as to increase the performance of the antenna in response to a plurality of antennas operating in different frequency bands.
즉, 상기 차폐시트(120)는 상기 제1주파수 대역의 자기장을 차폐함과 아울러 소요의 방향으로 집속시키는 제1시트층(121)과 상기 제2주파수 대역의 자기장을 차폐함과 아울러 소요의 방향으로 집속시키는 제2시트층(122)을 포함한다.That is, the shielding sheet 120 shields the magnetic field of the first frequency band, and shields the magnetic field of the first sheet layer 121 and the second frequency band while focusing in the required direction, and also the required direction. The second sheet layer 122 is focused to.
여기서, 상기 제1시트층(121)은 상기 제1주파수 대역에서 작동하는 안테나와 대응되는 영역에 배치되며, 상기 제2시트층(122)은 상기 제2주파수 대역에서 작동하는 안테나와 대응되는 영역에 배치된다.Here, the first sheet layer 121 is disposed in an area corresponding to the antenna operating in the first frequency band, and the second sheet layer 122 is an area corresponding to the antenna operating in the second frequency band. Is placed on.
이를 통해, 상기 제1시트층(121)은 제1주파수 대역에서 작동하는 무선전력전송용 안테나(114c)의 성능, 일례로 충전 효율 또는 전력 전송 효율을 높이기 위한 것이며, 상기 제2시트층(122)은 제2주파수 대역에서 작동하는 근거리 통신용 안테나(114a)의 성능, 일례로 무선인식을 높일 수 있게 된다.Through this, the first sheet layer 121 is to increase the performance of the wireless power transmission antenna 114c operating in the first frequency band, for example, charging efficiency or power transmission efficiency, and the second sheet layer 122 ) Can increase the performance of the near field communication antenna 114a operating in the second frequency band, for example, wireless recognition.
이때, 상기 제1시트층(121) 및 제2시트층(122)은 서로 다른 투자율을 갖도록 구비될 수 있다. 일례로, 상기 제1시트층(121)은 100~1000, 바람직하게는 900의 투자율을 갖도록 구비될 수 있다. 그러나 제1시트층(121)의 투자율을 이에 한정하는 것은 아니며 설계조건에 따라 적절하게 변경될 수 있다.In this case, the first sheet layer 121 and the second sheet layer 122 may be provided to have different permeability. For example, the first sheet layer 121 may be provided to have a magnetic permeability of 100 to 1000, preferably 900. However, the permeability of the first sheet layer 121 is not limited thereto, and may be appropriately changed according to design conditions.
일례로, 상기 제1시트층(121)은 비정질 합금 및 나노 결정립 합금 중 적어도 1종을 포함하는 리본시트가 사용될 수 있고, 상기 제2시트층(122)은 폴리머 시트 또는 페라이트 시트가 사용될 수 있다.For example, the first sheet layer 121 may be a ribbon sheet including at least one of an amorphous alloy and a nano grain alloy, and the second sheet layer 122 may be a polymer sheet or a ferrite sheet. .
이와 같이 본 발명에 따른 차폐시트(120)는 서로 다른 투자율을 갖는 복수의 자성시트를 적층하여 구성하고 복수 개의 자성시트가 해당 안테나와 대응되게 배치됨으로써 각각의 안테나의 성능을 높일 수 있게 된다.As described above, the shielding sheet 120 according to the present invention is configured by stacking a plurality of magnetic sheets having different magnetic permeability and by placing the plurality of magnetic sheets corresponding to the corresponding antennas, thereby increasing the performance of each antenna.
여기서, 상기 비정질 합금 및 나노 결정립 합금은 Fe계 또는 Co계 자성 합금이 사용될 수 있으며, 재료비용을 고려할 때 Fe계 자성 합금을 사용하는 것이 바람직하다. 더불어, 상기 비정질 합금 및 나노결정립 합금은 3원소 합금 또는 5원소 합금을 포함할 수 있고, 예를 들어, 상기 3원소 합금은 Fe, Si 및 B를 포함하며, 상기 5원소 합금은 Fe, Si, B, Cu 및 Nb를 포함할 수 있다.Here, the amorphous alloy and the nano-crystalline alloy may be used a Fe-based or Co-based magnetic alloy, it is preferable to use a Fe-based magnetic alloy in consideration of the material cost. In addition, the amorphous alloy and the nanocrystalline alloy may include a three-element alloy or a five-element alloy, for example, the three-element alloy includes Fe, Si and B, the five-element alloy is Fe, Si, It may include B, Cu and Nb.
그리고, 상기 페라이트 시트는 소결 페라이트 시트로 이루어질 수 있으며, Mn-Zn 페라이트 또는 Ni-Zn 페라이트로 이루어질 수 있다. 바람직하게는 상기 페라이트 시트가 Ni-Zn 소결 페라이트로 이루어질 수 있다. 더불어, 상기 폴리머 시트는 비정질 합금 분말, 연자성체 분말, 샌더스트와 같은 고투자율의 자성분말과 수지로 이루어질 수 있다.The ferrite sheet may be made of a sintered ferrite sheet, and may be made of Mn-Zn ferrite or Ni-Zn ferrite. Preferably, the ferrite sheet may be made of Ni-Zn sintered ferrite. In addition, the polymer sheet may be made of magnetic powder and resin having a high permeability such as amorphous alloy powder, soft magnetic powder, and sand dust.
이때, 상기 제1시트층(121)은 도 1에 도시된 바와 같이 하부에 배치되는 제2시트층(122)보다 상대적으로 작은 크기를 갖도록 구비될 수 있다.In this case, the first sheet layer 121 may be provided to have a relatively smaller size than the second sheet layer 122 disposed below, as shown in FIG. 1.
즉, 상기 제1시트층(121)은 상기 근거리 통신용 안테나(114a)의 내측에 배치되는 무선전력전송용 안테나(114c) 영역을 포함하는 크기를 갖도록 구비된다. 이에 따라, 상기 제1시트층(121)을 통해 무선전력전송용 안테나(114c)의 전 영역을 커버함으로써 무선전력전송용 안테나의 성능을 효과적으로 향상시킬 수 있도록 한다.That is, the first sheet layer 121 is provided to have a size including an area of the wireless power transmission antenna 114c disposed inside the short range communication antenna 114a. Accordingly, by covering the entire area of the wireless power transmission antenna 114c through the first sheet layer 121, it is possible to effectively improve the performance of the wireless power transmission antenna.
더불어, 상기 무선전력전송용 안테나(114c)의 성능을 향상시키기 위한 제1시트층(121)이 상기 근거리 통신용 안테나(114a)의 직상부에 배치되지 않음으로써 상기 제1시트층(121)이 근거리 통신용 안테나(114a)의 성능에 영향을 미치는 것을 방지할 수 있도록 하기 위함이다.In addition, since the first sheet layer 121 for improving the performance of the wireless power transmission antenna 114c is not disposed directly above the short range communication antenna 114a, the first sheet layer 121 is near. This is to prevent affecting the performance of the communication antenna 114a.
일례로, 상기 제1시트층(121)은 상기 근거리 통신용 안테나(114a)의 내측 영역을 초과하지 않는 면적을 갖도록 구비된다. 다시 말하면, 상기 제1시트층(121)은 상기 근거리 통신용 안테나(114a)의 내측 영역은 포함하되 상기 근거리 통신용 안테나(114a)의 직상부 영역은 포함하지 않는 적정한 면적을 갖도록 구비된다. For example, the first sheet layer 121 is provided to have an area that does not exceed an inner region of the near field communication antenna 114a. In other words, the first sheet layer 121 is provided to have an appropriate area including an inner region of the near field communication antenna 114a but not including an area directly above the near field antenna 114a.
여기서, 상기 제1시트층(121)은 안테나유닛(110)에 MST용 안테나(114b)가 구비되는 경우 상기 MST용 안테나(114b)의 직상부 영역을 포함하는 크기를 갖도록 구비될 수도 있고 MST용 안테나(114b)의 직상부 영역을 포함하지 않는 크기를 갖도록 구비될 수도 있음을 밝혀둔다.Here, when the antenna unit 110 is provided with the MST antenna 114b, the first sheet layer 121 may be provided to have a size including an upper region of the MST antenna 114b. Note that it may be provided to have a size that does not include the area directly above the antenna (114b).
한편, 상기 제1시트층(121)이 하부에 배치되는 제2시트층(122)보다 작은 크기를 갖도록 구비되는 경우, 상기 제1시트층(121)의 외곽을 둘러싸도록 버퍼층(136)이 배치될 수 있다. 이때, 상기 제1시트층(121)과 버퍼층(136)을 합한 크기는 상기 제2시트층(122)의 크기와 일치하도록 구비될 수도 있다.(도 2c참조)On the other hand, when the first sheet layer 121 is provided to have a smaller size than the second sheet layer 122 disposed below, the buffer layer 136 is disposed to surround the outer periphery of the first sheet layer 121 Can be. In this case, the combined size of the first sheet layer 121 and the buffer layer 136 may be provided to match the size of the second sheet layer 122 (see FIG. 2C).
더불어, 상기 제1시트층(121)의 측면을 둘러싸도록 버퍼층(136)이 배치되는 경우 상기 버퍼층(136)은 직하부에 배치되는 근거리 통신용 안테나(114a)의 성능에 영향을 미치지 않도록 비자성체로 이루어질 수 있으며, 근거리 통신용 안테나(114a)의 성능을 높일 수 있도록 제2시트층(122)과 동일한 재료가 사용될 수도 있음을 밝혀둔다.In addition, when the buffer layer 136 is disposed to surround the side of the first sheet layer 121, the buffer layer 136 may be formed of a nonmagnetic material so as not to affect the performance of the near field communication antenna 114a disposed below. Note that the same material as the second sheet layer 122 may be used to increase the performance of the near field communication antenna 114a.
또한, 상기 제1시트층(121')은 제조의 편의를 위하여 상기 제2시트층(122)과 동일한 크기를 갖도록 구비될 수도 있음을 밝혀둔다(도 2a 및 도 2b참고). In addition, it is noted that the first sheet layer 121 ′ may be provided to have the same size as the second sheet layer 122 for convenience of manufacture (see FIGS. 2A and 2B).
여기서, 동일한 크기란 두께를 제외한 폭과 길이가 동일한 수치를 갖거나, 두께를 제외한 반경이 동일한 수치를 갖는다는 것을 의미하는 것으로, 서로 대향하는 단면적이 동일함을 의미한다.Here, the same size means that the width and the length excluding the thickness have the same value, or the radius except the thickness has the same value, and the cross-sectional areas facing each other are the same.
한편, 상기 제1시트층(121,121')은 복수 개의 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 박판의 리본시트(121a,121b,121c)가 다층으로 구성될 수도 있음을 밝혀둔다(도 3 참조).On the other hand, the first sheet layer (121, 121 ′) is a thin ribbon sheet (121a, 121b, 121c) containing at least one of a plurality of amorphous alloys and nano-crystalline alloy may be revealed that may be composed of a multilayer (Fig. 3).
여기서, 상기 제1시트층(121,121')이 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 박판의 리본시트가 다층으로 구성되는 경우 각각의 리본시트 사이에는 접합부재(121d)가 개재됨으로써 다층의 리본시트를 일체화하게 된다.Here, when the ribbon sheet of a thin sheet including at least one of an amorphous alloy and a nano-crystalline alloy is composed of a multilayer of the first sheet layer (121, 121 '), the bonding member 121d is interposed between the ribbon sheets to form a multilayer. The ribbon sheet of the will be integrated.
이때, 상기 접합부재(121d)는 비전도성 성분을 포함할 수 있으며, 상기 접합부재(121d)는 로 구비될 수도 있고 필름 형태로 구비되는 기재의 일면 또는 양면에 가 도포된 형태로 구비될 수도 있다.In this case, the bonding member 121d may include a non-conductive component, and the bonding member 121d may be provided as or may be provided in a form in which is applied to one or both surfaces of the substrate provided in a film form. .
한편, 상기 제1주파수 대역에서 작동하는 무선전력전송용 안테나의 성능을 높이기 위한 상기 제1시트층(121,121')은 전체적인 저항을 높여 와전류의 발생을 줄일 수 있도록 플레이크 처리되어 복수 개의 미세 조각으로 분리 형성될 수 있고, 복수 개의 미세 조각들은 서로 이웃하는 미세 조각들 간에 전체적으로 절연되거나 부분적으로 절연될 수 있으며, 각각의 미세조각들은 비정형으로 랜덤하게 이루어질 수 있다. 여기서, 상기 미세조각들은 1㎛ ~ 3mm의 크기를 가질 수 있다.Meanwhile, the first sheet layers 121 and 121 'for improving the performance of the wireless power transmission antenna operating in the first frequency band are flake-processed to reduce the generation of eddy currents by increasing the overall resistance and separating the plurality of fine pieces into pieces. The plurality of fine pieces may be entirely insulated or partially insulated from neighboring fine pieces, and each of the fine pieces may be irregularly random. Here, the fine pieces may have a size of 1㎛ ~ 3mm.
일례로, 상기 제1시트층(121,121')이 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 박판의 리본시트로 구성되는 경우, 상기 리본시트는 열처리 후 플레이크 처리되어 복수 개의 미세 조각으로 분리 형성될 수 있으며, 복수 개의 미세조각들은 서로 이웃하는 미세 조각들 간에 전체적으로 절연되거나 부분적으로 절연될 수 있다. 이때, 각각의 미세 조각들은 1㎛ ~ 3mm의 크기로 구비될 수 있으며, 각각의 미세조각들은 그 형상이 비정형으로 랜덤하게 형성될 수 있다.For example, when the first sheet layers 121 and 121 'are made of a thin ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy, the ribbon sheet is flake-treated after heat treatment to be separated into a plurality of fine pieces. The plurality of microflakes may be entirely insulated or partially insulated from neighboring fine pieces. At this time, each of the fine pieces may be provided with a size of 1㎛ ~ 3mm, each of the fine pieces may be randomly formed in a shape irregular.
더불어, 상기 제1시트층(121,121')이 복수 개의 미세조각으로 분리형성된 복수 개의 리본시트가 다층으로 구성되는 경우, 각각의 리본시트는 상기 접합부재를 매개로 다층으로 일체화될 수 있다. 이때, 상기 접합부재는 비전도성 성분을 포함할 수 있다. 이를 통해, 상기 접합부재 중 적어도 일부가 각각의 리본시트를 구성하는 복수 개의 미세조각들의 틈새로 스며들어 서로 이웃하는 미세조각들을 전체적으로 또는 부분적으로 절연하게 된다.In addition, when the plurality of ribbon sheets in which the first sheet layers 121 and 121 'are separated into a plurality of fine pieces is configured in a multilayer, each ribbon sheet may be integrated into a multilayer through the bonding member. In this case, the bonding member may include a non-conductive component. As a result, at least some of the bonding members penetrate into the gaps of the plurality of fine pieces constituting each ribbon sheet to insulate the neighboring fine pieces in whole or in part.
그러나, 상기 제1시트층(121,121')을 위에 언급한 종류로 한정하는 것은 아니며 자성의 성질을 갖는 물질이면 모두 사용될 수 있음을 밝혀둔다.However, the first sheet layers 121 and 121 'are not limited to the above-mentioned types, and any materials having magnetic properties may be used.
더불어, 상기 제2주파수 대역에서 작동하는 근거리 통신용 안테나의 성능을 높이기 위한 제2시트층(122) 역시 플레이크 처리되어 복수 개의 조각으로 분리형성될 수 있다. 일례로, 상기 제2시트층(122)이 취성이 강한 페라이트 시트로 구성되는 경우 상기 페라이트 시트가 복수 개의 미세조각으로 분리형성됨으로써 시트 자체의 유연성을 높이고 크랙 및 분리에 의한 시트 자체의 특성 변화를 최소화할 수 있게 된다.In addition, the second sheet layer 122 for improving the performance of the short-range communication antenna operating in the second frequency band may also be formed into a plurality of pieces by being flaked. For example, when the second sheet layer 122 is formed of a brittle ferrite sheet, the ferrite sheet is separated into a plurality of fine pieces, thereby increasing the flexibility of the sheet itself and changing the characteristics of the sheet itself due to cracking and separation. It can be minimized.
상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)는 본 발명에 따른 자기장 차폐시트의 노출면에 구비됨으로써 차폐시트의 노출면 중 적어도 일부가 외부에 노출되지 않도록 한다.The fine strip detachment and oxidation preventing members 130, 130 ', 130 ", 230 are provided on the exposed surface of the magnetic shielding sheet according to the present invention so that at least some of the exposed surfaces of the shielding sheet are not exposed to the outside.
특히, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)는 차폐시트가 금속성분을 포함하는 자성체로 이루어지는 경우 타발면에 해당하는 차폐시트의 측면이 외부로 노출되는 것을 방지하여 공기 및/또는 수분과의 접촉을 통해 산화되는 것을 방지하고, 측면으로부터 금속성분의 미세조각이 탈리되는 것을 방지하여 제품의 신뢰성을 향상시킬 수 있게 된다.In particular, the fine strip detachment and oxidation prevention member (130,130 ', 130 ", 230) is a case where the shielding sheet is made of a magnetic material containing a metal component to prevent the side of the shielding sheet corresponding to the punching surface to be exposed to the outside And / or to prevent oxidation through contact with moisture and to prevent detachment of fine pieces of metal from the side surface, thereby improving product reliability.
일례로, 상기 제1시트층(121,121')이 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 리본시트와 같이 금속성분을 포함하는 자성체로 이루어지는 경우 상기 제1시트층(121,121')의 측면은 제조과정에서 타발공정에 의해 형성되는 타발면이 된다. 이에 따라, 상기 타발면에서 리본 조각과 같은 금속성분의 미세 조각이 떨어져 나갈 경우 이탈된 미세조각은 전자회로에 쇼트를 발생시키게 된다.For example, when the first sheet layers 121 and 121 'are made of a magnetic material containing a metal component, such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy, the side surfaces of the first sheet layers 121 and 121' are formed. Becomes the punching surface formed by the punching process in the manufacturing process. Accordingly, when the fine pieces of the metal component such as ribbon pieces fall off from the punching surface, the separated fine pieces generate a short in the electronic circuit.
본 발명에서는 상기 제1시트층(121,121')이 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 리본시트와 같이 금속성분을 포함하는 자성체로 이루어지는 경우 타발면에 해당하는 제1시트층(121,121')의 측면을 둘러싸도록 미세조각 탈리 및 산화 방지부재(130,130',130",230)가 구비됨으로써 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)에 의해 금속성분의 미세조각들이 타발면인 제1시트층(121,121')의 측면으로부터 이탈되는 것을 방지하도록 한다.In the present invention, when the first sheet layers 121 and 121 'are made of a magnetic material containing a metal component, such as a ribbon sheet containing at least one of an amorphous alloy and a nanocrystalline alloy, the first sheet layers 121 and 121 corresponding to the punched surface The fine stripping and anti-oxidation members 130, 130 ', 130 ", 230 are provided to surround the side surface of the " To prevent them from being separated from the side surfaces of the first sheet layers 121 and 121 ', which are punched surfaces.
이에 따라, 상기 제1시트층(121,121')이 비정질 합금 및 나노 결정립 합금 중 1종 이상을 포함하는 리본시트와 같이 금속성분을 포함하는 재질로 이루어지더라도 금속성분의 미세조각들이 측면으로부터 탈리되는 것을 방지하고 공기 및/또는 수분과의 접촉을 통해 산화되는 것을 방지함으로써 제품의 신뢰성을 높이고 탈리된 금속성분의 미세조각에 의해 전자회로에서 쇼트가 발생하는 것을 미연에 방지할 수 있게 된다.Accordingly, even though the first sheet layers 121 and 121 'are made of a material containing a metal component, such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy, fine pieces of the metal component are detached from the side surface. By preventing the oxidization through contact with air and / or moisture, it is possible to increase the reliability of the product and to prevent the short circuit from occurring in the electronic circuit by the fine fragment of the detached metal component.
여기서, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)의 적어도 일면에 도포되는 접착제(134)는 상기 제1시트층(121,121')의 측면으로부터 분리된 미세 조각들이 타발면에 접착된 상태로 유지될 수 있도록 비전도성 성분을 포함하는 접착제로 구비될 수 있다. Here, the adhesive 134 that is applied to at least one surface of the micro scrap detachment and oxidation preventing members 130, 130 ′, 130 ″, 230 may include fine pieces separated from the side surfaces of the first sheet layers 121 and 121 ′ on the punching surface. It may be provided with an adhesive including a non-conductive component to be kept in the bonded state.
그리고, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)는 보호필름의 시트형태로 구비될 수도 있고, 디핑, 분사, 인쇄 등을 통하여 액상 또는 겔상의 코팅층이 상기 제1시트층(121,121')의 측면에 도포되는 형태로 구비될 수도 있다. In addition, the fine strip detachment and oxidation preventing members 130, 130 ', 130 ", 230 may be provided in the form of a sheet of a protective film, the liquid or gel-like coating layer through the dipping, spraying, printing, etc., the first sheet layer It may be provided in the form applied to the side of (121,121 ').
더불어, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)는 왁스, 에폭시 수지, 멜라닌 수지, 실리콘 수지, 아크릴 수지, 에틸렌 프로필렌고무 수지(EPDM) 및 폴리비닐 알콜 수지(PVA) 중에서 선택된 1종 이상을 포함하는 고분자 수지일 수도 있다. In addition, the fine stripping and anti-oxidation member (130,130 ', 130 ", 230) is a wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) It may be a polymer resin containing at least one selected.
한편, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)가 보호필름의 형태로 구비되는 경우 상기 보호필름은 폴리에틸렌 테레프탈레이트(PET)필름, 폴리프로필렌(PP) 필름, 폴리테레프탈레이트(PTFE)와 같은 불소 수지계 필름 등이 사용될 수도 있다.On the other hand, when the micro-flake stripping and anti-oxidation member (130, 130 ', 130 ", 230) is provided in the form of a protective film, the protective film is polyethylene terephthalate (PET) film, polypropylene (PP) film, polyterephthalate Fluorine resin films such as (PTFE) may be used.
이와 같은 상기 미세조각 탈리 및 산화 방지부재(130,130',130")는 도 1 및 도 2에 도시된 바와 같이 적어도 상기 제1시트층(121,121')의 측면을 덮는 제2부분(132)을 포함하며, 제조과정의 편의 및 접착성의 증대를 위하여 상기 제1시트층(121,121')의 상부면을 덮는 제1부분(131)을 포함할 수 있다.The fine stripping and oxidation preventing members 130, 130 ′ and 130 ″ include a second portion 132 covering at least the side surfaces of the first sheet layers 121 and 121 ′ as shown in FIGS. 1 and 2. In addition, a first portion 131 covering the upper surfaces of the first sheet layers 121 and 121 ′ may be included for convenience of manufacturing and increase of adhesiveness.
또한, 상기 미세조각 탈리 및 산화 방지부재(230)는 도 2d에 도시된 바와 같이 상기 제1시트층(121)의 측면만을 덮도록 구비될 수도 있다.In addition, the fine strip detachment and oxidation preventing member 230 may be provided so as to cover only the side surface of the first sheet layer 121, as shown in Figure 2d.
이때, 상기 제1시트층(121)이 제2시트층(122)보다 작은 크기를 갖도록 구비되는 경우 미세조각 탈리 및 산화 방지부재(130)는 도 1 및 도 2c에 도시된 바와 같이 상기 제2부분(132)으로부터 연장되어 상기 제2시트층(122)의 상부면을 덮는 제3부분(133)을 포함할 수 있다.In this case, when the first sheet layer 121 is provided to have a smaller size than the second sheet layer 122, the fine stripping and anti-oxidation member 130 may be formed as shown in FIGS. 1 and 2C. It may include a third portion 133 extending from the portion 132 to cover the top surface of the second sheet layer 122.
이에 따라, 상기 제3부분(133)이 상기 제1시트층(121)의 측면을 덮는 제2부분(132)으로부터 상기 제2시트층(122)의 상부면까지 연장됨으로써 미세조각 탈리 및 산화 방지부재(130)가 보호필름의 형태로 구비되는 경우 접착면적의 증대를 통한 상기 보호필름의 접착력을 증대시킬 수 있게 된다.Accordingly, the third portion 133 extends from the second portion 132 covering the side surface of the first sheet layer 121 to the upper surface of the second sheet layer 122, thereby preventing fine stripping and oxidation. When the member 130 is provided in the form of a protective film, it is possible to increase the adhesive force of the protective film by increasing the adhesive area.
더불어, 상기 제1시트층(121)이 상기 제2시트층(122)과 동일한 크기를 갖도록 구비되는 경우 상기 미세조각 탈리 및 산화 방지부재(130")는 도 2b에 도시된 바와 같이 상기 제2시트층(122)의 측면을 덮도록 상기 제2부분(132)으로부터 연장될 수도 있다. In addition, when the first sheet layer 121 is provided to have the same size as the second sheet layer 122, the fine flake stripping and oxidation preventing member 130 ″ is formed as shown in FIG. 2B. It may extend from the second portion 132 to cover the side of the sheet layer 122.
이때, 상기 제2부분(132)으로부터 연장되는 연장부분은 접착면적의 증대를 통하여 상기 미세조각 탈리 및 산화 방지부재(130")의 접착력을 증대시킬 수 있도록 상기 제2시트층(122)의 하부면 일부를 덮도록 연장될 수도 있다.At this time, the extended portion extending from the second portion 132 has a lower portion of the second sheet layer 122 so as to increase the adhesion of the fine flake stripping and oxidation preventing member 130 ″ by increasing the adhesion area. It may extend to cover part of the face.
또한, 상기 제1시트층(121)의 측부에 버퍼층(136)이 배치되는 경우 상기 미세조각 탈리 및 산화 방지부재(130)의 제2부분(132) 및 제3부분(133)은 양면에 상기 접착제(134)가 도포되어 상기 버퍼층(136)이 접착제를 통해 고정될 수 있다.In addition, when the buffer layer 136 is disposed on the side of the first sheet layer 121, the second portion 132 and the third portion 133 of the fine stripping and oxidation preventing member 130 may be formed on both surfaces thereof. An adhesive 134 may be applied to fix the buffer layer 136 through the adhesive.
도면과 설명에는 상기 미세조각 탈리 및 산화 방지부재(130,130',130")가 상기 제1시트층(121) 및/또는 제2시트층(122)의 측면 및/또는 상부면에 구비되는 것으로 도시하고 설명하였지만, 이에 한정하는 것은 아니며 제1시트층(121) 및 제2시트층(122)의 측면만을 동시에 덮는 형태로 구비될 수도 있음을 밝혀둔다. 더불어, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)는 제품에 차폐시트(120,120'120",220)를 적용하는 과정에서 외부로 노출되는 차폐시트(120,120'120",220)의 모든 노출면에 적용될 수도 있음을 밝혀둔다.In the drawings and descriptions, the fine stripping and oxidation preventing members 130, 130 'and 130 " are provided on the side and / or top surfaces of the first sheet layer 121 and / or the second sheet layer 122. As described above, the present invention is not limited thereto, and it may be provided to cover only the side surfaces of the first sheet layer 121 and the second sheet layer 122 at the same time. 130, 130 ′, 130 ″, 230 may be applied to all exposed surfaces of the shield sheets 120, 120 ′ 120 ″, 220 exposed to the outside in the process of applying the shield sheets 120, 120 ′ 120 ″, 220 to the product. Put it.
더불어, 상기 제1시트층(121) 및 제2시트층(122)이 모두 금속성분을 포함하는 자성체로 이루어지는 경우 상기 미세조각 탈리 및 산화 방지부재(130,130',130")는 외부로 노출되는 제1시트층(121) 및 제2시트층(122)의 측면을 모두 덮도록 배치되는 것이 바람직하다(도 2b 참조).In addition, when both the first sheet layer 121 and the second sheet layer 122 are made of a magnetic material including a metal component, the fine stripping and oxidation preventing members 130, 130 ′, 130 ″ may be exposed to the outside. It is preferable to arrange | position so that the side surface of the 1st sheet layer 121 and the 2nd sheet layer 122 may be covered (refer FIG. 2B).
한편, 상기 미세조각 탈리 및 산화 방지부재(130,130',130",230)가 배치되지 않는 상기 제2시트층(122)의 하부면에는 제거가능한 별도의 커버필름(140)이 구비될 수 있다.Meanwhile, a separate cover film 140 may be provided on a lower surface of the second sheet layer 122 in which the micro scrap detachment and oxidation preventing members 130, 130 ′, 130 ″, and 230 are not disposed.
또한, 상기 무선전력 전송모듈(100)은 휴대 단말기와 같은 전자기기의 경박단소화의 요구에 따라 전체두께를 0.15 ~ 0.6mm의 두께로 제조할 수 있으며, 0.3mm의 두께로 사용할 수도 있음을 밝혀둔다.In addition, the wireless power transmission module 100 can be manufactured to a thickness of 0.15 ~ 0.6mm, and can also be used as a thickness of 0.3mm in accordance with the needs of light and thin shortening of electronic devices such as portable terminals. Put it.
여기서, 상기 무선전력 전송모듈(100)의 전체두께로 0.15 ~ 0.6mm를 예시하였지만, 이는 무선전력 전송모듈의 전체두께가 얇은 두께를 갖는다는 것으로 이해되어야 할 것이며, 무선전력 전송모듈의 전체두께를 한정하는 것은 아님을 밝혀둔다.Here, although the entire thickness of the wireless power transmission module 100 is illustrated as 0.15 ~ 0.6mm, it should be understood that the overall thickness of the wireless power transmission module has a thin thickness, the total thickness of the wireless power transmission module Note that it is not limiting.
한편, 도면에는 안테나유닛(110)이 상기 차폐시트 중 제2시트층(122)의 일면에 부착되는 것으로 도시하였지만 이에 한정하는 것은 아니며, 제1시트층(121,121')의 일면에 부착될 수도 있음을 밝혀둔다.On the other hand, the antenna unit 110 is shown to be attached to one surface of the second sheet layer 122 of the shielding sheet, but is not limited thereto, and may be attached to one surface of the first sheet layers 121 and 121 '. To reveal.
이와 같은 본 발명의 일 실시예에 따른 무선전력 전송모듈(100)은 도 6에 도시된 바와 같이 휴대 단말기(90)의 리어 케이스 또는 백커버(92)의 내측에 설치될 수 있으며, 휴대 단말기에 별도로 결합되는 케이스에 설치될 수도 있다.Such a wireless power transmission module 100 according to an embodiment of the present invention can be installed inside the rear case or the back cover 92 of the mobile terminal 90, as shown in Figure 6, It may be installed in a case that is combined separately.
이상에서 본 발명의 일 실시예에 대하여 설명하였으나, 본 발명의 사상은 본 명세서에 제시되는 실시 예에 제한되지 아니하며, 본 발명의 사상을 이해하는 당업자는 동일한 사상의 범위 내에서, 구성요소의 부가, 변경, 삭제, 추가 등에 의해서 다른 실시 예를 용이하게 제안할 수 있을 것이나, 이 또한 본 발명의 사상범위 내에 든다고 할 것이다.Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components Other embodiments may be easily proposed by changing, deleting, adding, etc., but this will also be within the scope of the present invention.

Claims (25)

  1. 서로 다른 주파수 대역의 자기장을 이용하는 적어도 두 개의 안테나를 구비하는 콤보형 안테나유닛에 적용되는 자기장 차폐시트에 있어서,In the magnetic shielding sheet applied to the combo-type antenna unit having at least two antennas using magnetic fields of different frequency bands,
    제1주파수 대역의 자기장을 차폐함과 아울러 소요의 방향으로 집속시키는 금속 성분을 포함하는 제1시트층;A first sheet layer comprising a metal component for shielding the magnetic field of the first frequency band and focusing in a desired direction;
    제2주파수 대역의 자기장을 차폐함과 아울러 소요의 방향으로 집속시키는 제2시트층; 및A second sheet layer shielding the magnetic field of the second frequency band and focusing in a desired direction; And
    상기 제1시트층의 측면으로부터 미세조각이 탈리되거나 상기 측면이 산화되는 것을 방지하기 위하여 상기 제1시트층의 측면에 구비되는 미세조각 탈리 및 산화 방지부재;를 포함하는 자기장 차폐시트.And a fine stripping and anti-oxidation member provided on the side of the first sheet layer in order to prevent the fine strip from being detached from the side of the first sheet layer or the side is oxidized.
  2. 제 1항에 있어서,The method of claim 1,
    상기 미세조각 탈리 및 산화 방지부재는 보호필름인 자기장 차폐시트.The fine strip detachment and oxidation preventing member is a protective film magnetic field shielding sheet.
  3. 제 1항에 있어서,The method of claim 1,
    상기 제1시트층은 상기 제2시트층과 동일한 크기를 갖도록 구비되는 자기장 차폐시트.The first sheet layer is provided with a magnetic shielding sheet having the same size as the second sheet layer.
  4. 제 3항에 있어서,The method of claim 3, wherein
    상기 미세조각 탈리 및 산화 방지부재는 상기 제1시트층의 상부면을 덮는 제1부분과 상기 제1부분으로부터 연장되어 상기 제1시트층의 측면을 덮는 제2부분을 포함하는 자기장 차폐시트.The fine strip detachment and oxidation preventing member includes a first portion covering an upper surface of the first sheet layer and a second portion extending from the first portion to cover a side surface of the first sheet layer.
  5. 제 4항에 있어서,The method of claim 4, wherein
    상기 제2부분은 상기 제2시트층의 측면을 덮도록 연장되는 자기장 차폐시트.And the second portion extends to cover the side surface of the second sheet layer.
  6. 제 1항에 있어서,The method of claim 1,
    상기 제1시트층은 상기 제2시트층보다 더 작은 크기를 갖도록 구비되는 자기장 차폐시트.The first sheet layer is provided to have a smaller size than the second sheet layer magnetic field shielding sheet.
  7. 제 6항에 있어서,The method of claim 6,
    상기 미세조각 탈리 및 산화 방지부재는 상기 제1시트층의 상부면을 덮는 제1부분과 상기 제1부분으로부터 연장되어 상기 제1시트층의 측면을 덮는 제2부분 및 상기 제2부분으로부터 연장되어 상기 제2시트층의 일부를 덮는 제3부분을 포함하는 자기장 차폐시트.The micro scrap and anti-oxidation member extends from a first portion covering the top surface of the first sheet layer and a second portion extending from the first portion and covering the side surface of the first sheet layer and the second portion. And a third portion covering a portion of the second sheet layer.
  8. 제 6항에 있어서,The method of claim 6,
    상기 제2시트층의 상부면에는 상기 제1시트층을 둘러싸도록 제1시트층의 외곽에 버퍼층이 구비되고, 상기 제2시트층은 상기 제1시트층과 버퍼층을 합한 크기와 일치하도록 구비되는 자기장 차폐시트.The upper surface of the second sheet layer is provided with a buffer layer on the outside of the first sheet layer to surround the first sheet layer, the second sheet layer is provided to match the size of the sum of the first sheet layer and the buffer layer. Magnetic shielding sheet.
  9. 제 8항에 있어서,The method of claim 8,
    상기 버퍼층은 비자성체로 이루어지는 자기장 차폐시트.The buffer layer is a magnetic shielding sheet made of a nonmagnetic material.
  10. 제 6항에 있어서,The method of claim 6,
    상기 제1주파수 대역의 자기장은 무선전력전송용이고, 상기 제2주파수 대역의 자기장은 근거리 통신용이며, 상기 제1시트층은 무선전력전송용 안테나에 대응되게 배치되고, 상기 제2시트층은 근거리 통신용 안테나에 대응되게 배치되는 자기장 차폐시트.The magnetic field of the first frequency band is for wireless power transmission, the magnetic field of the second frequency band is for short range communication, and the first sheet layer is disposed corresponding to the antenna for wireless power transmission, and the second sheet layer is near Magnetic shielding sheet disposed to correspond to the antenna for communication.
  11. 제 1항에 있어서,The method of claim 1,
    상기 미세조각 탈리 및 산화 방지부재는 왁스, 에폭시 수지, 멜라닌 수지, 실리콘 수지, 아크릴 수지, 에틸렌 프로필렌고무 수지(EPDM) 및 폴리비닐 알콜 수지(PVA) 중에서 선택된 1종 이상을 포함하는 고분자 수지를 포함하는 자기장 차폐시트. The fine strip detachment and antioxidant member includes a polymer resin including at least one selected from wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA). Magnetic shielding sheet.
  12. 제 1항에 있어서,The method of claim 1,
    상기 제1시트층과 상기 제2시트층은 서로 다른 투자율을 갖는 자성체로 이루어지는 자기장 차폐시트.The first sheet layer and the second sheet layer is a magnetic shielding sheet made of a magnetic material having a different permeability.
  13. 제 1항에 있어서,The method of claim 1,
    상기 제1시트층은 비정질 합금 및 나노 결정립 합금 중 적어도 1종 이상을 포함하는 리본시트이고, 상기 제2시트층은 페라이트 시트 또는 폴리머 시트인 자기장 차폐시트.The first sheet layer is a ribbon sheet including at least one or more of an amorphous alloy and a nano-crystalline alloy, the second sheet layer is a magnetic shielding sheet is a ferrite sheet or a polymer sheet.
  14. 제 1항에 있어서,The method of claim 1,
    상기 제1시트층은 비정질 합금 및 나노 결정립 합금 중 적어도 1종 이상을 포함하는 리본시트가 다층으로 적층되는 자기장 차폐시트.The first sheet layer is a magnetic shielding sheet in which a ribbon sheet including at least one or more of an amorphous alloy and a nano-crystalline alloy is laminated in multiple layers.
  15. 제 13항에 있어서,The method of claim 13,
    상기 페라이트 시트는 Mn-Zn 페라이트 또는 Ni-Zn 페라이트로 이루어진 자기장 차폐시트.The ferrite sheet is a magnetic shielding sheet made of Mn-Zn ferrite or Ni-Zn ferrite.
  16. 제 1항에 있어서,The method of claim 1,
    상기 제1시트층 및 제2시트층 중 적어도 하나 또는 둘 다는 복수 개의 미세 조각으로 분리형성되는 자기장 차폐시트.At least one or both of the first sheet layer and the second sheet layer is formed of a magnetic shielding sheet separated into a plurality of fine pieces.
  17. 제 16항에 있어서,The method of claim 16,
    상기 복수 개의 미세 조각들은 서로 이웃하는 미세 조각들 간에 전체적으로 절연되거나 부분적으로 절연되는 자기장 차폐시트.The plurality of fine pieces of the magnetic shielding sheet is entirely insulated or partially insulated between neighboring fine pieces.
  18. 제 16항에 있어서,The method of claim 16,
    상기 복수 개의 미세 조각은 1㎛ ~ 3mm의 크기인 자기장 차폐시트.The plurality of fine pieces are magnetic shielding sheet size of 1㎛ ~ 3mm.
  19. 제 16항에 있어서,The method of claim 16,
    상기 복수 개의 미세 조각은 비정형으로 이루어지는 자기장 차폐시트.The plurality of fine pieces of magnetic field shielding sheet consisting of an amorphous.
  20. 제 1항에 있어서,The method of claim 1,
    상기 미세조각 탈리 및 산화 방지부재는 비전도성 성분을 포함하는 접착제를 매개로 부착되는 자기장 차폐시트.The fine strip detachment and oxidation preventing member is a magnetic shielding sheet is attached via an adhesive containing a non-conductive component.
  21. 무선전력전송용 안테나 및 근거리 통신용 안테나를 포함하는 안테나유닛; 및An antenna unit including an antenna for wireless power transmission and an antenna for near field communication; And
    상기 안테나유닛의 일면에 배치되고 상기 안테나유닛에서 발생되는 자기장을 차폐하여 소요의 방향으로 집속하는 청구항 제1항 내지 제20항 중 어느 한 항에 기재된 차폐시트;를 포함하는 무선전력 전송모듈.A shielding sheet according to any one of claims 1 to 20, which is disposed on one surface of the antenna unit and focuses in a required direction by shielding a magnetic field generated by the antenna unit.
  22. 제 21항에 있어서,The method of claim 21,
    상기 안테나유닛은 MST용 안테나를 더 포함하는 무선전력 전송모듈.The antenna unit further comprises a wireless power transmission module for MST antenna.
  23. 제 21항에 있어서,The method of claim 21,
    상기 무선전력 전송모듈의 총두께가 0.15 ~ 0.6mm인 무선전력 전송모듈.Wireless power transmission module of the total thickness of the wireless power transmission module is 0.15 ~ 0.6mm.
  24. 제 23항에 있어서,The method of claim 23, wherein
    상기 무선전력 전송모듈의 총두께가 0.3mm인 무선전력 전송모듈.Wireless power transmission module of which the total thickness of the wireless power transmission module is 0.3mm.
  25. 청구항 21항에 기재된 무선전력 전송모듈을 구비하는 휴대 단말기.A portable terminal comprising the wireless power transfer module according to claim 21.
PCT/KR2015/014391 2015-01-05 2015-12-29 Magnetic field shielding sheet and wireless power transmitting module including same WO2016111496A1 (en)

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CN201580072256.6A CN107112811B (en) 2015-01-05 2015-12-29 Magnetic field shielding piece and wireless power transmission module comprising same
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