WO2013165166A1 - Magnetic sheet having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same - Google Patents

Magnetic sheet having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same Download PDF

Info

Publication number
WO2013165166A1
WO2013165166A1 PCT/KR2013/003753 KR2013003753W WO2013165166A1 WO 2013165166 A1 WO2013165166 A1 WO 2013165166A1 KR 2013003753 W KR2013003753 W KR 2013003753W WO 2013165166 A1 WO2013165166 A1 WO 2013165166A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
magnetic sheet
wireless charging
magnetic layer
based resin
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/KR2013/003753
Other languages
French (fr)
Inventor
Soon Young Hyun
Seok Bae
So Yeon Kim
Won Ha Moon
Nam Yang Lee
Hyung Eui Lee
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.)
LG Innotek Co Ltd
Original Assignee
LG Innotek 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
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Priority to US14/397,882 priority Critical patent/US20150130582A1/en
Priority to CN201380028928.4A priority patent/CN104335299B/en
Publication of WO2013165166A1 publication Critical patent/WO2013165166A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01F1/20—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 in the form of particles, e.g. powder
    • H01F1/22—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 in the form of particles, e.g. powder pressed, sintered, or bound together
    • 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
    • H01F1/16—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 in the form of sheets
    • 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
    • H01F1/20—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 in the form of particles, e.g. powder
    • H01F1/28—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 in the form of particles, e.g. powder dispersed or suspended in a bonding agent
    • 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
    • H01F1/34—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 non-metallic substances, e.g. ferrites
    • H01F1/36—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 non-metallic substances, e.g. ferrites in the form of particles
    • H01F1/37—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 non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2876—Cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H01F41/04—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 for manufacturing coils
    • H01F41/041—Printed circuit coils
    • H01F41/043—Printed circuit coils by thick film techniques
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/003—Printed circuit coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Definitions

  • the present invention relates to a magnetic sheet having a wireless charging radiator function, which is applied to a wireless charging device, and a manufacturing method and use thereof.
  • arithmetic operation devices and portable information communication such as a cellular phone, personal digital assistants (PDA), a palm-top computer, an internet phone and the like use a charging battery as an energy source, a battery charger is necessarily required.
  • a desktop or portable charger which has been currently commercialized adopts a contact-type charging method for bringing a battery into contact electrically with a charger.
  • the contact-type charger has various problems which should be solved.
  • the problems such as a charge failure problem and a battery lifetime shortening problem caused by contact failure should be solved.
  • the thickness of a magnetic material As a current wireless charging technology, to satisfy the values of permeability and a loss rate resulting from corresponding frequency (i.e. a magnetic resonance type of 100 to 200 kHz, a magnetic induction type of 200 to 300 kHz, 6.78 Mhz), the thickness of a magnetic material, the thickness and winding number of a metal coil material and the like become main factors for a magnetic material part (i.e. a magnetic material/metal coil material assembly).
  • a conventional wireless charging magnetic material part is formed in a structure in which a magnetic material layer composed of a ferrite sintered material, a ferrite composite, a sendust sintered material, a composite and the like, an adhesive layer formed on the magnetic material layer, and a metal coil material formed on the adhesive layer to perform a radiator function are laminated.
  • the adhesive layer or an air layer located between the magnetic material layer and the metal coil material causes an obstacle in permeability improvement, an obstacle in loss rate reduction, an obstacle in increase of charging efficiency and an obstacle in slimming design of a wireless charging device due to the lamination structure.
  • An aspect of the present invention provides a wireless charging magnetic material part which can improve permeability ( ⁇ ) required at the time of charging and which can reduce a loss rate and obtain high charging efficiency (Q).
  • Another aspect of the present invention provides a wireless charging magnetic material part which enables a wireless charging device to be designed to be slim.
  • a magnetic sheet having a radiator function for wireless charging including: a magnetic layer having a thin-film shape and composed of a magnetic layer composition containing a magnetic material power and a binder resin; and a thin-film coil for radiator use which is directly inlaid on a surface of the magnetic layer.
  • the magnetic sheet having the radiator function for wireless charging is characterized in that the magnetic material power is one element or an alloy of a combination of two or more elements selected from the group consisting of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd, or ferrite power.
  • the magnetic sheet having the radiator function for wireless charging is characterized in that a particle size of the magnetic material power ranges from 3 mm to 50 ⁇ m.
  • the magnetic sheet having the radiator function for wireless charging is characterized in that the binder resin is one resin or a mixture of two or more resins selected from the group consisting of a polyvinyl alcohol-based resin, a silicon-based resin, an epoxy-based resin, an acrylate-based rein, an urethane-based resin, a polyamide-based resin, and a polyimide-based resin.
  • the binder resin is one resin or a mixture of two or more resins selected from the group consisting of a polyvinyl alcohol-based resin, a silicon-based resin, an epoxy-based resin, an acrylate-based rein, an urethane-based resin, a polyamide-based resin, and a polyimide-based resin.
  • the magnetic sheet having the radiator function for wireless charging is characterized in that a mix proportion of the magnetic material power to the binder in the magnetic layer composition is 10 to 90 ⁇ 95 to 5 in a weight ratio.
  • the magnetic sheet having the radiator function for wireless charging is characterized in that the magnetic layer composition contains a general additive agent, which is generally mixed in the bind resin, in an amount of less than 2 wt.% with respect to a total weight of the composition
  • the magnetic sheet having the radiator function for wireless charging is characterized in that the metal thin-film coil is composed of one element or an alloy of a combination of two or more elements selected from the group consisting of Ag, Au, Cu and Al.
  • the magnetic sheet having the radiator function for wireless charging is characterized in that a thickness of the metal thin-film coil ranges from 5 ⁇ m to 1 mm.
  • the wireless charging magnetic sheet having a radiator function for wireless charging is characterized in that a pitch of the metal thin-film coil ranges from 5 to 500 ⁇ m.
  • a method of manufacturing the magnetic sheet having the radiator function for wireless charging including: molding a magnetic layer having the thin-film shape with a magnetic layer composition containing a magnetic material power and a binder resin; and forming a thin-film coil by directly inlaying it on a surface of the magnetic layer.
  • the metal thin-film coil may be formed by an inlaying method.
  • Examples of the inlaying method are a method of forming a partial intaglio on a surface of a magnetic layer using a laser and filling it with a metal, a method of masking a surface of a magnetic layer, and thereafter forming an intaglio thereon using drying and etching processes, and filling it with a metal, and a method of forming an intaglio on a magnetic layer using a method of forming a step fully (i.e. a method of forming an intaglio by providing a press difference between corresponding area and non-corresponding area), and filling it with a metal.
  • a wireless charging device with a magnetic sheet having a radiator function for wireless charging.
  • the magnetic sheet 10 of the present invention corresponding to the conventional magnetic layer and radiator coil material assembly has a much thinner thickness compared to the conventional assembly and has no adhesive layer or air layer between the magnetic layer and the radiator, permeability required at the time of charging can be improved, a loss rate can be reduced and high charging efficiency can be obtained, Furthermore, since a band width and a gain rate can be improved, the magnetic sheet can be very usefully applied to wireless charging products which pursue slimming in design.
  • FIG. 1 is a photo showing a planar structure of a conventional magnetic layer/radiator coil assembly
  • FIG. 2 is a cross-sectional view schematically showing a laminated structure of the assembly shown in FIG. 1;
  • FIG. 3 is a plane view showing a planar structure of a magnetic sheet having a radiator function for wireless charging according to one exemplary embodiment
  • FIG. 4 is a cross-sectional view schematically showing a laminated structure of the magnetic sheet shown in FIG. 3.
  • the present inventor has found the following matters through a research and has suggested the present invention.
  • a thin-film coil having a radiator function is directly inlaid on a magnetic layer having a film shape and composed of a magnetic material power and a binder resin, an adhesive layer or an air layer was not present between the magnetic layer and the radiator. Therefore, permeability ( ⁇ ) required at the time of charging could be improved, a loss rate could be reduced, and high charging efficiency (Q) could be obtained.
  • ⁇ permeability
  • Q high charging efficiency
  • a thickness could be largely reduced, it could be very usefully applied to a slimming design of wireless charging devices, and material and process costs could be reduced.
  • laying means engraving a pattern on a surface and filling it with a metal of the same pattern.
  • a magnetic sheet according to the present invention which is intended to replace a conventional magnetic layer/metal coil assembly, is a magnetic sheet having a radiator function for wireless charging.
  • a magnetic sheet 10 of the present invention may include: a magnetic layer 11 having a thin-film shape; and a thin-film coil for radiator use 12 which is directly inlaid on a surface of the magnetic layer.
  • the magnetic sheet 10 of the present invention is configured such that the magnetic layer 11 having the thin-film shape is composed of a magnetic layer composition, and the magnetic composition contains a magnetic material power and a binder resin.
  • the example of the magnetic material power which can be used in a magnetic layer composition, is one element or an alloy of a combination of two or more elements selected from the group consisting of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd, or ferrite powder.
  • the binder resin may be uniformly mixed with the magnetic material power. If a binder has a property which enables thin-film molding of the magnetic material composition to be performed, the binder is not specifically limited.
  • the examples of the binder resin are a polyvinyl alcohol-based resin, a silicon-based resin, an epoxy-based resin, an acrylate-based rein, an urethane-based resin, a polyamide-based resin, and a polyimide-based resin and the like.
  • the resin may be used alone or in a mixture of two or more resins.
  • a particle size of the magnetic material power ranges from 3 nm to 50 ⁇ m. If the particle size of the magnetic material power fails to meet the lowest limit of the range, it would be difficult to uniformly mix it with the resin, thereby causing non-uniform distribution of the magnetic material power on the magnetic layer. Furthermore, if the particle size exceeds the upper limit of the range, it would be difficult to make the magnetic layer thin. Thus, it is preferable that the particle size of the magnetic material power is selected within the range.
  • a mix proportion of the magnetic material power to the binder resin is 10 to 90 ⁇ 95 to 5 in a weight ratio. If the mix proportion of the magnetic material power in the magnetic layer composition is high, a physical property of the film is rather insufficient. If the mix proportion of the magnetic material power is too low, a wireless charging performance can be deteriorated. Thus, it is preferable that the magnetic material power and the binder resin are mixed in the proportion of the above range.
  • a general additive agent which is generally mixed in the bind resin, may be mixed in the magnetic layer composition of the present invention.
  • this additive agent is mixed therein, it would be preferable that a content thereof is less than 2 wt.% with respect to a total weight of the composition.
  • the examples of the additive agent are a silane coupling agent, a defoaming agent, a cross-linking agent and the like.
  • the metal thin-film coil 12 laminated directly on the magnetic layer 11 having the thin-film shape performs a radiator function.
  • the examples of the material metal are Ag, Au, Cu and Al and the like.
  • the metal may be used alone or in an alloy of a combination of two or more elements.
  • the metal thin-film coil 12 has a thickness of 5 ⁇ m to 1mm, and a pitch of 5 to 500 ⁇ m.
  • the metal thin-film coil 12 having this shape may be formed by a method in which the magnetic layer 11 having the thin-film shape is directly inlaid with a metal.
  • the magnetic sheet 10 of the present invention may be manufactured by molding the magnetic material layer 11 having the thin-film shape with the magnetic layer composition containing the magnetic material powder and binder resin, and thereafter, forming the metal thin-film coil 12 by inlaying directly it on a surface of the magnetic layer 11.
  • the molding of the magnetic layer 11 having the thin-film shape may be performed using a process of forming a thin film directly on a substrate, which has been well-known in the relevant field, a process of molding the thin film and the like.
  • the process of forming the thin film directly on the substrate there is a process of forming the thin film by depositing the magnetic layer composition on the substrate using laser vapor deposition (LVD), physical vapor deposition (PVD), chemical vapor deposition (CVD) and the like.
  • LLD laser vapor deposition
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • the example of the thin-film molding process using molding is a thin-film molding process using the injecting, pressing, casting and blow-molding of a magnetic layer composition.
  • Examples of the inlaying method used in the formation of the metal thin-film coil 12 are a method of forming a partial intaglio on a surface of a magnetic layer using a laser and filling it with a metal, a method of masking a surface of a magnetic layer, and thereafter forming an intaglio thereon using drying and etching processes, and filling it with a metal, and a method of forming an intaglio on a magnetic layer using a method of forming a step fully, and filling it with a metal.
  • the magnetic sheet 10 having the radiator function for wireless charging may be applied to various wireless charging products. Since magnetic sheet 10 of the present invention has a much thinner thickness compared to the conventional magnetic layer/radiator coil assembly, and there is no adhesive layer or air layer between the magnetic layer and the radiator, permeability required at the time of charging can be improved, a loss rate can be reduced, and high charging efficiency can be obtained. Furthermore, since a band width and a gain rate can be improved, the magnetic sheet 10 can be very usefully applied to wireless charging products which pursue a slimming design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Since the magnetic sheet (10) of the present invention has a much thinner thickness compared to a corresponding conventional magnetic layer and radiator coil material assembly and has no adhesive layer or air layer between the magnetic layer and the radiator, permeability required at the time of charging can be improved, a loss rate can be reduced and high charging efficiency can be obtained. Furthermore, since a band width and a gain rate can be improved, the magnetic sheet can be very usefully applied to wireless charging products which pursue slimming in design.

Description

MAGNETIC SHEET HAVING WIRELESS CHARGING RADIATOR FUNCTION, METHOD OF MANUFACTURING THE SAME, AND WIRELESS CHARGING DEVICE USING THE SAME
The present invention relates to a magnetic sheet having a wireless charging radiator function, which is applied to a wireless charging device, and a manufacturing method and use thereof.
In general, since arithmetic operation devices and portable information communication such as a cellular phone, personal digital assistants (PDA), a palm-top computer, an internet phone and the like use a charging battery as an energy source, a battery charger is necessarily required.
A desktop or portable charger which has been currently commercialized adopts a contact-type charging method for bringing a battery into contact electrically with a charger. The contact-type charger has various problems which should be solved.
For example, the problems such as a charge failure problem and a battery lifetime shortening problem caused by contact failure should be solved. A problem which is that when a charger or a communication device is exposed to moisture or dust, system performance is deteriorated, should be solved. Also, a problem which is that since the malfunction of a communication device is generated due to static electricity generated when a charging metal terminal exposed to the outside comes into contact with the user’s clothing, the reliability of a product is reduced, should be solved.
To solve these problems, researches for adopting a wireless charging method for charging a battery using a magnetic combination without an electrical contact have been carried out.
In a current wireless charging technology, to satisfy the values of permeability and a loss rate resulting from corresponding frequency (i.e. a magnetic resonance type of 100 to 200 kHz, a magnetic induction type of 200 to 300 kHz, 6.78 Mhz), the thickness of a magnetic material, the thickness and winding number of a metal coil material and the like become main factors for a magnetic material part (i.e. a magnetic material/metal coil material assembly).
As exemplified in FIG. 1, a conventional wireless charging magnetic material part is formed in a structure in which a magnetic material layer composed of a ferrite sintered material, a ferrite composite, a sendust sintered material, a composite and the like, an adhesive layer formed on the magnetic material layer, and a metal coil material formed on the adhesive layer to perform a radiator function are laminated.
In such a conventional magnetic material part having the radiator function for wireless charging, the adhesive layer or an air layer located between the magnetic material layer and the metal coil material causes an obstacle in permeability improvement, an obstacle in loss rate reduction, an obstacle in increase of charging efficiency and an obstacle in slimming design of a wireless charging device due to the lamination structure.
An aspect of the present invention provides a wireless charging magnetic material part which can improve permeability (μ) required at the time of charging and which can reduce a loss rate and obtain high charging efficiency (Q).
Another aspect of the present invention provides a wireless charging magnetic material part which enables a wireless charging device to be designed to be slim.
According to an aspect of the present invention, there is provided a magnetic sheet having a radiator function for wireless charging, including: a magnetic layer having a thin-film shape and composed of a magnetic layer composition containing a magnetic material power and a binder resin; and a thin-film coil for radiator use which is directly inlaid on a surface of the magnetic layer.
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that the magnetic material power is one element or an alloy of a combination of two or more elements selected from the group consisting of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd, or ferrite power.
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that a particle size of the magnetic material power ranges from 3 mm to 50㎛.
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that the binder resin is one resin or a mixture of two or more resins selected from the group consisting of a polyvinyl alcohol-based resin, a silicon-based resin, an epoxy-based resin, an acrylate-based rein, an urethane-based resin, a polyamide-based resin, and a polyimide-based resin.
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that a mix proportion of the magnetic material power to the binder in the magnetic layer composition is 10 to 90 ~ 95 to 5 in a weight ratio.
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that the magnetic layer composition contains a general additive agent, which is generally mixed in the bind resin, in an amount of less than 2 wt.% with respect to a total weight of the composition
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that the metal thin-film coil is composed of one element or an alloy of a combination of two or more elements selected from the group consisting of Ag, Au, Cu and Al.
Preferably, according to the present invention, the magnetic sheet having the radiator function for wireless charging is characterized in that a thickness of the metal thin-film coil ranges from 5 ㎛ to 1 mm.
According to the present invention, the wireless charging magnetic sheet having a radiator function for wireless charging is characterized in that a pitch of the metal thin-film coil ranges from 5 to 500㎛.
According to another aspect of the present invention, there is provided a method of manufacturing the magnetic sheet having the radiator function for wireless charging, the method including: molding a magnetic layer having the thin-film shape with a magnetic layer composition containing a magnetic material power and a binder resin; and forming a thin-film coil by directly inlaying it on a surface of the magnetic layer.
In the method, the metal thin-film coil may be formed by an inlaying method.
Examples of the inlaying method are a method of forming a partial intaglio on a surface of a magnetic layer using a laser and filling it with a metal, a method of masking a surface of a magnetic layer, and thereafter forming an intaglio thereon using drying and etching processes, and filling it with a metal, and a method of forming an intaglio on a magnetic layer using a method of forming a step fully (i.e. a method of forming an intaglio by providing a press difference between corresponding area and non-corresponding area), and filling it with a metal.
Also, According to an aspect of the present invention, there is provided a wireless charging device with a magnetic sheet having a radiator function for wireless charging.
According to the present invention, since the magnetic sheet 10 of the present invention corresponding to the conventional magnetic layer and radiator coil material assembly has a much thinner thickness compared to the conventional assembly and has no adhesive layer or air layer between the magnetic layer and the radiator, permeability required at the time of charging can be improved, a loss rate can be reduced and high charging efficiency can be obtained, Furthermore, since a band width and a gain rate can be improved, the magnetic sheet can be very usefully applied to wireless charging products which pursue slimming in design.
The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain principles of the present invention. In the drawings:
FIG. 1 is a photo showing a planar structure of a conventional magnetic layer/radiator coil assembly;
FIG. 2 is a cross-sectional view schematically showing a laminated structure of the assembly shown in FIG. 1;
FIG. 3 is a plane view showing a planar structure of a magnetic sheet having a radiator function for wireless charging according to one exemplary embodiment; and
FIG. 4 is a cross-sectional view schematically showing a laminated structure of the magnetic sheet shown in FIG. 3.
First, the present inventor has found the following matters through a research and has suggested the present invention. When a thin-film coil having a radiator function is directly inlaid on a magnetic layer having a film shape and composed of a magnetic material power and a binder resin, an adhesive layer or an air layer was not present between the magnetic layer and the radiator. Therefore, permeability (μ) required at the time of charging could be improved, a loss rate could be reduced, and high charging efficiency (Q) could be obtained. Furthermore, since a thickness could be largely reduced, it could be very usefully applied to a slimming design of wireless charging devices, and material and process costs could be reduced.
The term “inlaying” used in the present invention means engraving a pattern on a surface and filling it with a metal of the same pattern.
Hereinafter, the present invention will be specifically explained with reference to the accompanying drawings showing one exemplary embodiment of the present invention.
A magnetic sheet according to the present invention, which is intended to replace a conventional magnetic layer/metal coil assembly, is a magnetic sheet having a radiator function for wireless charging.
As illustrated in FIG. 3 and FIG. 4, a magnetic sheet 10 of the present invention may include: a magnetic layer 11 having a thin-film shape; and a thin-film coil for radiator use 12 which is directly inlaid on a surface of the magnetic layer.
The magnetic sheet 10 of the present invention is configured such that the magnetic layer 11 having the thin-film shape is composed of a magnetic layer composition, and the magnetic composition contains a magnetic material power and a binder resin.
The example of the magnetic material power, which can be used in a magnetic layer composition, is one element or an alloy of a combination of two or more elements selected from the group consisting of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd, or ferrite powder.
In the magnetic layer composition of the present invention, the binder resin may be uniformly mixed with the magnetic material power. If a binder has a property which enables thin-film molding of the magnetic material composition to be performed, the binder is not specifically limited. The examples of the binder resin are a polyvinyl alcohol-based resin, a silicon-based resin, an epoxy-based resin, an acrylate-based rein, an urethane-based resin, a polyamide-based resin, and a polyimide-based resin and the like. The resin may be used alone or in a mixture of two or more resins.
Preferably, a particle size of the magnetic material power ranges from 3 nm to 50㎛. If the particle size of the magnetic material power fails to meet the lowest limit of the range, it would be difficult to uniformly mix it with the resin, thereby causing non-uniform distribution of the magnetic material power on the magnetic layer. Furthermore, if the particle size exceeds the upper limit of the range, it would be difficult to make the magnetic layer thin. Thus, it is preferable that the particle size of the magnetic material power is selected within the range.
In the magnetic layer composition of the present invention, it is preferable that a mix proportion of the magnetic material power to the binder resin is 10 to 90 ~ 95 to 5 in a weight ratio. If the mix proportion of the magnetic material power in the magnetic layer composition is high, a physical property of the film is rather insufficient. If the mix proportion of the magnetic material power is too low, a wireless charging performance can be deteriorated. Thus, it is preferable that the magnetic material power and the binder resin are mixed in the proportion of the above range.
Also, a general additive agent, which is generally mixed in the bind resin, may be mixed in the magnetic layer composition of the present invention. In a case where this additive agent is mixed therein, it would be preferable that a content thereof is less than 2 wt.% with respect to a total weight of the composition. The examples of the additive agent are a silane coupling agent, a defoaming agent, a cross-linking agent and the like.
In the magnetic sheet 10 of the present invention, the metal thin-film coil 12 laminated directly on the magnetic layer 11 having the thin-film shape performs a radiator function. The examples of the material metal are Ag, Au, Cu and Al and the like. The metal may be used alone or in an alloy of a combination of two or more elements.
Preferably, the metal thin-film coil 12 has a thickness of 5㎛ to 1mm, and a pitch of 5 to 500㎛. The metal thin-film coil 12 having this shape may be formed by a method in which the magnetic layer 11 having the thin-film shape is directly inlaid with a metal.
Hereinafter, a manufacturing method of the magnetic sheet 10 having the radiator function for wireless charging according to the present invention will be explained based on preferred exemplary embodiments.
For example, the magnetic sheet 10 of the present invention may be manufactured by molding the magnetic material layer 11 having the thin-film shape with the magnetic layer composition containing the magnetic material powder and binder resin, and thereafter, forming the metal thin-film coil 12 by inlaying directly it on a surface of the magnetic layer 11.
The molding of the magnetic layer 11 having the thin-film shape may be performed using a process of forming a thin film directly on a substrate, which has been well-known in the relevant field, a process of molding the thin film and the like.
As the example of the process of forming the thin film directly on the substrate, there is a process of forming the thin film by depositing the magnetic layer composition on the substrate using laser vapor deposition (LVD), physical vapor deposition (PVD), chemical vapor deposition (CVD) and the like.
The example of the thin-film molding process using molding is a thin-film molding process using the injecting, pressing, casting and blow-molding of a magnetic layer composition.
Examples of the inlaying method used in the formation of the metal thin-film coil 12 are a method of forming a partial intaglio on a surface of a magnetic layer using a laser and filling it with a metal, a method of masking a surface of a magnetic layer, and thereafter forming an intaglio thereon using drying and etching processes, and filling it with a metal, and a method of forming an intaglio on a magnetic layer using a method of forming a step fully, and filling it with a metal.
The magnetic sheet 10 having the radiator function for wireless charging may be applied to various wireless charging products. Since magnetic sheet 10 of the present invention has a much thinner thickness compared to the conventional magnetic layer/radiator coil assembly, and there is no adhesive layer or air layer between the magnetic layer and the radiator, permeability required at the time of charging can be improved, a loss rate can be reduced, and high charging efficiency can be obtained. Furthermore, since a band width and a gain rate can be improved, the magnetic sheet 10 can be very usefully applied to wireless charging products which pursue a slimming design.
As previously described, in the detailed description of the invention, having described the detailed exemplary embodiments of the invention, it should be apparent that modifications and variations can be made by persons skilled without deviating from the spirit or scope of the invention. Therefore, it is to be understood that the foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims and their equivalents.

Claims (10)

  1. A magnetic sheet having a radiator function for wireless charging, the magnetic sheet comprising:
    a magnetic layer having a thin-film shape and composed of a magnetic layer composition containing a magnetic material powder and a binder resin; and
    a thin-film coil for radiator use which is directly inlaid on a surface of the magnetic layer.
  2. The magnetic sheet of claim 1, wherein the magnetic material power is one element or an alloy of a combination of two or more elements selected from the group consisting of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd, or ferrite power.
  3. The magnetic sheet of claim 1, wherein a particle size of the magnetic material power ranges from 3 mm to 50㎛.
  4. The magnetic sheet of claim 1, wherein the binder resin is one resin or a mixture of two or more resins selected from the group consisting of a polyvinyl alcohol-based resin, a silicon-based resin, an epoxy-based resin, an acrylate-based rein, an urethane-based resin, a polyamide-based resin and a polyimide-based resin.
  5. The magnetic sheet of claim 1, wherein a mix proportion of the magnetic material power to the binder in the magnetic layer composition is 10 to 90 ~ 95 to 5 in a weight ratio.
  6. The magnetic sheet of claim 1, wherein the magnetic layer composition contains a general additive agent, which is generally mixed in the bind resin, in an amount of less than 2 wt.% with respect to a total weight of the composition.
  7. The magnetic sheet of claim 1, wherein the metal thin-film coil is composed of one element or an alloy of a combination of two or more elements selected from the group consisting of Ag, Au, Cu and Al.
  8. The magnetic sheet of claim 1, wherein a thickness of the metal thin-film coil ranges from 5㎛ to 1mm.
  9. The magnetic sheet of claim 1, wherein a pitch of the metal thin-film coil ranges from 5 to 500㎛.
  10. A wireless charging device with a magnetic sheet having a radiator function for wireless charging as defined in any one of Claims 1 to 9.
PCT/KR2013/003753 2012-04-30 2013-04-30 Magnetic sheet having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same Ceased WO2013165166A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/397,882 US20150130582A1 (en) 2012-04-30 2013-04-30 Magnetic sheet having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same
CN201380028928.4A CN104335299B (en) 2012-04-30 2013-04-30 Magnetic sheet having wireless charging radiator function, method for manufacturing the same, and wireless charging device using the magnetic sheet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120045800A KR101984790B1 (en) 2012-04-30 2012-04-30 Magnetic sheet and Fabricating method of the same, Electric device for wireless charging using the same
KR10-2012-0045800 2012-04-30

Publications (1)

Publication Number Publication Date
WO2013165166A1 true WO2013165166A1 (en) 2013-11-07

Family

ID=49514520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2013/003753 Ceased WO2013165166A1 (en) 2012-04-30 2013-04-30 Magnetic sheet having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same

Country Status (5)

Country Link
US (1) US20150130582A1 (en)
KR (1) KR101984790B1 (en)
CN (1) CN104335299B (en)
TW (1) TW201351451A (en)
WO (1) WO2013165166A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104979913A (en) * 2014-04-03 2015-10-14 Lg伊诺特有限公司 Wireless Power Transmission Equipment
CN105513781A (en) * 2014-10-13 2016-04-20 三星电机株式会社 Coil type unit for wireless power transmission and manufacturing method of coil type unit for wireless power transmission
EP4287224A4 (en) * 2021-01-26 2025-04-23 SKC Co., Ltd. WIRELESS CHARGING DEVICE AND MEANS OF TRANSPORTATION THEREOF

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101474149B1 (en) * 2013-06-28 2014-12-17 삼성전기주식회사 Shield part, method of fabricating the same, and contactless power transmission device having the shield part
CN105161279A (en) * 2015-09-17 2015-12-16 无锡斯贝尔磁性材料有限公司 Production process of wireless-charging magnetic sheet
TWI595723B (en) * 2016-02-05 2017-08-11 捷佳科技股份有限公司 Method for manufacturing wireless charging device
CN106898473B (en) * 2017-01-18 2018-06-15 佛山市南海科盈华电子有限公司 A kind of lattice coil
CN109111724A (en) * 2018-07-18 2019-01-01 江苏金羿先磁新材料科技有限公司 A kind of wireless charging adaptation film sewed
WO2020044203A1 (en) * 2018-08-31 2020-03-05 3M Innovative Properties Company Coil and method of making same
US12462963B2 (en) * 2019-10-29 2025-11-04 Skc Co., Ltd. Wireless charging device and moving means including same
KR20240003271A (en) 2022-06-30 2024-01-08 현대자동차주식회사 Wireless charging magnetic material and manufacturing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04141818A (en) * 1990-10-01 1992-05-15 Matsushita Electric Ind Co Ltd Magnetic recording medium and its manufacturing method
JP2009170488A (en) * 2008-01-11 2009-07-30 Yoshizumi Fukui Method for manufacturing mold coil
KR20100111409A (en) * 2009-04-07 2010-10-15 주식회사 아모텍 Magnetic sheet, rf identification antenna having radiation pattern incorporated into magnetic sheet, and method for producing the same
US20110210696A1 (en) * 2007-08-21 2011-09-01 Kabushiki Kaisha Toshiba Non-contact type power receiving apparatus, electronic equipment and charging system using the power receiving apparatus
KR101079679B1 (en) * 2009-06-03 2011-11-04 동양미래대학 산학협력단 Nothing junction all the member charging equipment

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111169A (en) * 1989-03-23 1992-05-05 Takeshi Ikeda Lc noise filter
JPH1041138A (en) * 1996-07-24 1998-02-13 Tokin Corp Laminated impedance element and method of manufacturing the same
JP2004047700A (en) * 2002-07-11 2004-02-12 Jfe Steel Kk Flat magnetic element for contactless charger
JP3995253B2 (en) * 2004-09-28 2007-10-24 Ｔｄｋ株式会社 Method for forming photosensitive polyimide pattern and electronic device having the pattern
CN101300648B (en) * 2005-11-01 2012-06-20 株式会社东芝 Flat magnetic element and power IC package using the same
JP4674590B2 (en) * 2007-02-15 2011-04-20 ソニー株式会社 Balun transformer, balun transformer mounting structure, and electronic device incorporating the mounting structure
US8915447B2 (en) * 2007-09-12 2014-12-23 Devicefidelity, Inc. Amplifying radio frequency signals
JP2009295671A (en) * 2008-06-03 2009-12-17 Sony Chemical & Information Device Corp Magnetic sheet and method for manufacturing the same
CN101860085A (en) * 2009-04-08 2010-10-13 鸿富锦精密工业（深圳）有限公司 wireless power supply
CN102804292B (en) * 2009-06-24 2014-10-22 株式会社村田制作所 Electronic component and method for producing the same
CN103180919B (en) * 2010-10-21 2016-05-18 Tdk株式会社 Coil component and manufacture method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04141818A (en) * 1990-10-01 1992-05-15 Matsushita Electric Ind Co Ltd Magnetic recording medium and its manufacturing method
US20110210696A1 (en) * 2007-08-21 2011-09-01 Kabushiki Kaisha Toshiba Non-contact type power receiving apparatus, electronic equipment and charging system using the power receiving apparatus
JP2009170488A (en) * 2008-01-11 2009-07-30 Yoshizumi Fukui Method for manufacturing mold coil
KR20100111409A (en) * 2009-04-07 2010-10-15 주식회사 아모텍 Magnetic sheet, rf identification antenna having radiation pattern incorporated into magnetic sheet, and method for producing the same
KR101079679B1 (en) * 2009-06-03 2011-11-04 동양미래대학 산학협력단 Nothing junction all the member charging equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104979913A (en) * 2014-04-03 2015-10-14 Lg伊诺特有限公司 Wireless Power Transmission Equipment
US9871383B2 (en) 2014-04-03 2018-01-16 Lg Innotex Co., Ltd. Wireless power transmitting apparatus
US10361026B2 (en) 2014-04-03 2019-07-23 Lg Innotek Co., Ltd. Wireless power transmitting apparatus
US10546685B2 (en) 2014-04-03 2020-01-28 Lg Innotek Co., Ltd. Wireless power transmitting apparatus
CN105513781A (en) * 2014-10-13 2016-04-20 三星电机株式会社 Coil type unit for wireless power transmission and manufacturing method of coil type unit for wireless power transmission
EP4287224A4 (en) * 2021-01-26 2025-04-23 SKC Co., Ltd. WIRELESS CHARGING DEVICE AND MEANS OF TRANSPORTATION THEREOF

Also Published As

Publication number Publication date
TW201351451A (en) 2013-12-16
KR20130122453A (en) 2013-11-07
CN104335299B (en) 2018-01-09
KR101984790B1 (en) 2019-05-31
CN104335299A (en) 2015-02-04
US20150130582A1 (en) 2015-05-14

Similar Documents

Publication Publication Date Title
WO2013165167A1 (en) Magnetic film having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same
WO2013165166A1 (en) Magnetic sheet having wireless charging radiator function, method of manufacturing the same, and wireless charging device using the same
WO2014054893A1 (en) Electromagnetic booster for wireless charging and method of manufacturing the same
CN108293314B (en) Magnetic field shielding unit and multifunctional composite module comprising same
KR101991177B1 (en) Logical battery
KR102175375B1 (en) Attractor for a wireless charging receiver module and a wireless charging receiver module having the same
WO2016186443A1 (en) Combo antenna unit and wireless power receiving module comprising same
CN109196969A (en) Mixed metal plate for magnetic screen and the wireless power transmission module including it
WO2013137546A1 (en) Combined radio frequency identification (rfid) and wireless charging electromagnetic wave absorber, combined rfid and wireless charging wireless antenna including same, and method for manufacturing same
WO2016114528A1 (en) Heat radiation unit and wireless power transmitting and receiving device having same
WO2016186444A1 (en) Shield unit for wireless charging and wireless power transmission module comprising same
CN107112811A (en) Magnetic field shielding sheet and wireless power transmission module including same
WO2017074104A1 (en) Magnetic field shield sheet for wireless power transmission and wireless power receiving module comprising same
CN107393677B (en) Magnetic sheet and wireless charging module
EP2850690A1 (en) Antenna for communication terminal and method of manufacturing the same
WO2015115789A1 (en) Wireless charging substrate and device
WO2018004262A1 (en) Composite sheet for emi shielding, and mobile terminal including same
WO2012141394A1 (en) Plate for a shield can for an smd process, manufacturing method thereof, and shield can using the plate
KR102006344B1 (en) Composite sheet, antenna module and preparation thereof
CN105428790B (en) A kind of laminated antenna device
WO2016111496A1 (en) Magnetic field shielding sheet and wireless power transmitting module including same
CN107887102B (en) Magnetic sheet and electronic device
WO2016010372A1 (en) Wireless charging module
KR102601640B1 (en) Magnetic shielding sheet, manufacturing method thereof and magnet type wireless power receiving device using the same
WO2012074149A1 (en) Method of manufacturing a case antenna with a built-in coil type wireless frequency antenna and case antenna apparatus thereby

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13784574

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 14397882

Country of ref document: US

122 Ep: pct application non-entry in european phase

Ref document number: 13784574

Country of ref document: EP

Kind code of ref document: A1