KR20170077705A - Antenna module and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an antenna module and a method of manufacturing the antenna module, the method comprising the steps of: applying a magnetic coating layer-forming composition containing magnetic particles to one surface of an antenna portion including an antenna pattern; And a magnetic coating layer formed on one surface of the antenna unit so as to be integrated with the antenna unit to improve the antenna characteristics and focus the magnetic flux toward the antenna. Accordingly, the second coating layer is slimmed as a separate adhesive layer is unnecessary , It is possible to realize an antenna module having excellent antenna characteristics.

Description

[0001] DESCRIPTION [0002] ANTENNA MODULE AND MANUFACTURING METHOD [

The present invention relates to an antenna module and a method of manufacturing the antenna module, and more particularly, to an antenna module capable of realizing a slimened antenna module because a separate adhesive layer is unnecessary, and a manufacturing method thereof.

(NFC) function to portable electronic devices such as mobile phones, PDAs (personal digital assistants), iPads, notebook computers, tablet PCs, and the like. Recently, products incorporating wireless power transmission technology have been commercialized. A new type of wireless power transmission (WPT) technology is a technology that enables a portable electronic device to charge a battery by directly transmitting power to a portable electronic device by adopting an electromagnetic induction method or an electromagnetic resonance method without using a power line. There is an increasing trend of portable electronic devices adopting the technology.

The short-range communication or the wireless power transmission may be performed through transmission / reception of a signal in a specific operating frequency band. Since the signal uses a magnetic field induced by a current in a transmitting antenna, (Magnetic material) in order to prevent deterioration of the performance, efficiency, human body, peripheral electronic products, or other components in the apparatus.

On the other hand, in recent portable electronic devices, there is a tendency that the magnetic sheets provided in the portable electronic devices are also required to be realized with a thin thickness. In addition, since the adhesive layer is separately provided, it takes a predetermined volume when applied to a portable device, so that miniaturization of the portable device is limited, and a separate step of forming an adhesive layer is required.

In particular, a magnetic polymer sheet having a high powder content is difficult to be bonded without an adhesive. In addition, when a thermoplastic resin is contained as a polymer as an adhesive material, the magnetic polymer sheet is bonded to the adherend surface through thermal bonding. Thus, there is a problem that the magnetic polymer sheet can be peeled from the surface to be bonded.

KR 10-2012-0113624 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide an antenna module and a method of manufacturing the same, which can realize a slim antenna module because a separate adhesive layer is unnecessary.

Another object of the present invention is to provide an antenna module and a method of manufacturing the antenna module, which can prevent the occurrence of a phenomenon of peeling between layers due to an excellent adhesive force and further improve antenna characteristics.

According to an aspect of the present invention, there is provided a method of manufacturing an antenna module, including: coating a magnetic coating layer-forming composition including magnetic particles on one surface of an antenna portion including an antenna pattern; And a second step of solidifying the magnetic coating layer forming composition to form a magnetic coating layer which is formed integrally with the antenna unit on one side of the antenna unit to improve antenna characteristics and focus a magnetic flux toward the antenna.

In addition, the first step may use at least one of blade coating, flow coating, casting, printing, transfer, brushing, dipping and spraying. have.

Further, the magnetic particles may include a soft magnetic material.

The soft magnetic material may include a soft magnetic metal material or ferrite.

The metal soft magnetic body may be a Ni-Co alloy, an Fe-Ni alloy, an Fe-Cr alloy, an Fe-Al alloy, an Fe-Si alloy, an Fe-Si- Wherein the ferrite is at least one selected from the group consisting of Mn-Zn ferrite, Ni-Zn ferrite, Ni-Zn ferrite, Fe-Si- Based ferrite, Co-based ferrite, Mg-Zn-based ferrite, Cu-Zn-based ferrite, and cobalt-substituted Y-type or Z-type hexagonal ferrite.

The magnetic coating layer-forming composition may include a natural polymer compound and a synthetic polymer compound.

In addition, the synthetic polymer compound may be a rubber compound.

The rubber compound may be a terpolymer of ethylene, propylene and a diene monomer copolymerized.

The viscosity of the magnetic coating layer forming composition may be 5,000 to 30,000 cps.

Another aspect of the present invention provides an antenna module. The antenna module includes an antenna unit including an antenna pattern; And a magnetic coating layer including magnetic particles dispersed in the polymer and embedded in the antenna pattern to be integrally formed on the antenna portion.

Further, the magnetic particles may include a soft magnetic material.

The soft magnetic material may include a soft magnetic metal material or ferrite.

The metal soft magnetic body may be a Ni-Co alloy, an Fe-Ni alloy, an Fe-Cr alloy, an Fe-Al alloy, an Fe-Si alloy, an Fe-Si- Wherein the ferrite is at least one selected from the group consisting of Mn-Zn ferrite, Ni-Zn ferrite, Ni-Zn ferrite, Fe-Si- Based ferrite, Co-based ferrite, Mg-Zn-based ferrite, Cu-Zn-based ferrite, and cobalt-substituted Y-type or Z-type hexagonal ferrite.

The thickness of the magnetic coating layer may be 10 to 300 mu m.

In addition, the antenna may include at least one selected from the group consisting of an antenna for a wireless power transmission (WPT), an antenna for a near field communication (NFC), and an antenna for a magnetic security transmission (MST).

The antennas may include a first antenna having a frequency band of 100 to 350 kHz as an operating frequency, a second antenna having a frequency band of 6.78 MHz as an operating frequency, and a third antenna having a frequency band of 13.56 MHz as an operating frequency. Antennas, and the like.

In addition, the magnetic coating layer may be formed by solidifying a magnetic coating layer-forming composition including a natural polymer compound and a synthetic polymer compound.

In addition, the synthetic polymer compound may be a rubber compound.

The rubber compound may be a terpolymer of ethylene, propylene and a diene monomer copolymerized.

Another aspect of the present invention provides an antenna module. The antenna module includes an NFC antenna portion including an antenna pattern for performing short-range wireless communication, and a magnetic coating layer formed integrally with the NFC antenna portion by burying the antenna pattern portion.

The heat sink may further include a heat dissipation unit disposed on the same plane as the NFC antenna unit to dissipate heat transmitted from the heat source or to disperse locally concentrated heat.

An antenna module according to another aspect of the present invention includes at least two antennas selected from the group consisting of an antenna for wireless power transmission (WPT), an antenna for short range communication (NFC), and an antenna for magnetic security transmission (MST) ; And a magnetic coating layer including Mg-Fe ferrite magnetic particles dispersed in the polymer and embedded in the antenna pattern to be integrally formed on the antenna portion.

The Mg-Fe-based ferrite magnetic particles may be Ni-Zn-Cu-Mg-Fe-based ferrite.

According to the antenna module of the present invention and the method of manufacturing the same, an antenna module that can realize a slimmed antenna module because a separate adhesive layer is unnecessary even though the magnetic property is improved by increasing the content of the magnetic material in the polymer sheet, and a manufacturing method thereof .

According to the antenna module and the manufacturing method thereof according to the present invention, it is possible to prevent the phenomenon of peeling between layers due to excellent adhesive force, and the thickness of the magnetic layer is increased by the thickness of the adhesive layer, .

1 is a perspective view of an antenna according to an embodiment of the present invention,
FIG. 2 is a cross-sectional view of an antenna module according to an embodiment of the present invention, and FIG.
3 is a plan view showing various positions of an NFC antenna pattern applied to an antenna module according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

A method of manufacturing an antenna module according to an embodiment of the present invention includes a step of applying a composition for forming a magnetic coating layer to one surface of an antenna portion and a step of forming a magnetic coating layer by solidifying the composition for forming a magnetic coating layer.

In the first step, the magnetic coating layer-forming composition containing magnetic particles is applied to one surface of the antenna portion including the antenna pattern. The magnetic coating layer-forming composition includes magnetic particles and a polymer. At this time, the magnetic coating layer forming composition may have a predetermined fluidity so as to be applied to one surface of the antenna unit. For example, the magnetic coating layer-forming composition may be partially melted to have fluidity, and may be in an emulsion state by addition of an emulsifier, but is not limited thereto.

When the magnetic particles are capable of exhibiting permeability properties of a magnetic coating layer described later in a particle state, there is no limitation on the composition, crystal type, and microstructure of the sintered particles, and a magnetic material contained in a known magnetic sheet may be used. As an example of this, the magnetic particles may include a soft magnetic material. Since the soft magnetic material has a very low coercive force with respect to the residual magnetic flux density and a high magnetic permeability, the shielding effect against electromagnetic fields is excellent. The soft magnetic material may include at least one of a metal soft magnetic material and a ferrite. The metal soft magnetic body may be at least one selected from the group consisting of Ni-Co alloy, Fe-Ni alloy, Fe-Cr alloy, Fe-Al alloy, Fe-Si alloy, Fe- Based alloy, Fe-Cr-Si-based alloy, and Fe-Si-B-Cu-Nb-based alloy. The ferrite may be selected from the group consisting of Mn-Zn ferrites, Ni-Zn ferrites, Ni-Co ferrites, Mg-Zn ferrites, Cu-Zn ferrites, and cobalt substituted Y or Z hexagonal ferrites And may include at least one selected. The ferrite may be an oxide of at least three metals selected from the group consisting of iron oxide and nickel, zinc, copper, magnesium and cobalt such as Ni-Cu-Zn ferrite and Ni-Cu- May be used but not limited thereto. At this time, the content of nickel, zinc, copper, magnesium and cobalt in the ferrite can be changed according to the purpose, so that the present invention does not particularly limit it.

The magnetic material included in the magnetic particles may be an amorphous alloy or a magnetic material composed of an alloy containing nanocrystalline grains.

The amorphous alloy may be an Fe-based or Co-based amorphous alloy, and it may be preferable to use an Fe-based amorphous alloy in consideration of the production cost. As the Fe-based amorphous alloy, for example, an Fe-Si-B-based amorphous alloy may be used. In this case, it is preferable that Fe is 70 to 90 at% and the sum of Si and B is 10 to 30 at%. The higher the content of Fe and other metals, the higher the saturation magnetic flux density. However, when the content of Fe element is excessive, it is difficult to form amorphous. Therefore, the content of Fe is preferably 70 to 90 at%. When the sum of Si and B is in the range of 10 to 30 at%, the amorphous forming ability of the alloy is the most excellent. In order to prevent corrosion in such a basic composition, corrosion resistance elements such as Cr and Co may be added in an amount of 20 at% or less, and a small amount of other metal elements may be added as necessary to impart different characteristics. For example, the Fe-Si-B alloy may have a crystallization temperature of 508 占 폚 and a Curie temperature (Tc) of 399 占 폚. However, such a crystallization temperature can be varied depending on the contents of Si and B, and other metal elements and their contents added in addition to the ternary alloy component.

In addition, the magnetic material included in one embodiment of the present invention may be an Fe-Si-B-Cu-Nb amorphous alloy. Copper contained in the alloy improves the corrosion resistance of the alloy and prevents the size of the crystal from becoming large even if crystals are generated, and also improves magnetic properties such as magnetic permeability. It is preferable that the copper is contained in the alloy in an amount of 0.01 to 10 at%. If the copper content is less than 0.01 at%, the effect obtained by copper may be insignificant. If the copper content exceeds 10 at%, an amorphous alloy is produced There is a problem that can be difficult. In addition, niobium (Nb) contained in the alloy can improve magnetic properties such as magnetic permeability and is preferably contained in an amount of 0.01 to 10 at% in the alloy. If it is contained in an amount of less than 0.01 at%, niobium May be insignificant, and if it exceeds 10 at%, it may be difficult to produce an amorphous alloy.

The magnetic body included in one embodiment of the present invention may include ferrite. Further, the ferrite may be ferrite containing magnesium. For example, the ferrite containing magnesium may be a Ni-Zn-Cu-Mg-Fe alloy. The Ni-Zn-Cu-Mg-Fe alloy exhibits excellent magnetic properties in a wide frequency band. In detail, excellent magnetic properties can be exhibited in the frequency band of 100 kHz to 100 MHz.

Specifically, the polymer can be dispersed easily with magnetic particles, excellent in adhesion to an antenna unit, excellent in shape retention when solidified, easily broken to an external force, or having no bending property remarkably low, , And can be used as a preferable polymer in the case of a material which does not deteriorate workability due to low tacky at room temperature.

The polymer may include a polymer compound of at least one of a natural polymer compound and a synthetic polymer compound.

Specifically, the natural polymer compound may be at least one of protein-based polymer compounds such as glue and gelatin, carbohydrate-based polymer compounds such as starch, cellulose and derivatives thereof and complex polysaccharides, and natural rubber compounds such as latex.

In addition, the synthetic polymer compound may include at least one of a thermoplastic polymer compound, a thermosetting polymer compound, and a rubber compound.

The thermoplastic polymer compound may be selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyacrylonitrile resin, acrylonitrile-butadiene-styrene (ABS), styrene- acrylonitrile (SAN) A polyamide, a thermoplastic polyester (Ex. Polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and the like), a polycarbonate, a polyphenylene sulfide resin, a polyamideimide, a polyvinyl butyral, a poly (Polytetrafluoroethylene (PTFE) and polychlorotrifluoroethylene (PCTFE)), phenoxy resins, poly (vinylidene fluoride), polyphenylene ether, Urethane resin, nitrile butadiene resin, and the like. The thermosetting polymeric compound may include at least one of a phenol resin (PE), a urea resin (UF), a melamine resin (MF), an unsaturated polyester resin (UP), and an epoxy resin. The rubber compound may be at least one selected from the group consisting of styrene-butadiene rubber (SBR), polybutadiene rubber (BR), acrylonitrile-butadiene rubber (NBR), polyisobutylene (PIB) rubber, acrylic rubber, Chloroprene, and the like.

The polymer may more preferably be formed by solidifying a rubber compound, and may be a rubber-based compound, more preferably a terpolymer in which ethylene, propylene and a diene monomer are copolymerized. At this time, the copolymerization molar ratio of the respective monomers may be changed according to the purpose, so that the present invention is not particularly limited thereto.

When the magnetic coating layer-forming composition is solidified through the curing reaction, the composition may further include a curing component capable of curing the polymer compound, and may further include a solvent and a curing accelerator.

As the non-limiting examples, the curable component may be an amine compound, a phenol resin, an acid anhydride, an imidazole compound, a polyamine compound, a hydrazide compound, a dicyandiamide compound and the like, They may be used alone or in combination of two or more. Examples of the curing component of the aromatic amine compound include m-xylene diamine, m-phenylenediamine, diaminodiphenylmethane, diaminodiphenylsulfone, diaminodearyl diphenylmethane, diaminodiphenyl ether, 1,3-bis (4-aminophenoxy) phenyl] sulfone, 4,4'-bis (4-aminophenoxy) (4-aminophenoxy) biphenyl, and 1,4-bis (4-aminophenoxy) benzene. These may be used alone or in combination. Examples of the phenol resin curing component include phenol novolac resins, cresol novolac resins, bisphenol A novolac resins, phenol aralkyl resins, poly-p-vinylphenol t-butylphenol novolac resins, naphthol novolac resins, and the like , Which may be used alone or in combination. The content of the curable component is preferably 20 to 60 parts by weight per 100 parts by weight of the polymer compound. If the content of the curable component is less than 10 parts by weight, the curing reaction is weak so that a desired level of bending property and tensile property If it exceeds 60 parts by weight, the reactivity with the polymer compound becomes high, and the physical properties such as handling property and long-term storage property may be deteriorated.

Since the curing accelerator can be determined depending on the specific kind of the polymer compound and the curable component, the present invention is not limited thereto, and examples thereof include amine-based, imidazole-based, phosphorus-based, And a phosphorus-boron-based curing accelerator, which can be used alone or in combination. The content of the curing accelerator is preferably about 0.1 to 10 parts by weight, and more preferably 0.5 to 5 parts by weight per 100 parts by weight of the polymer compound.

In addition, the solvent may be used without limitation in the case of a solvent commonly used in a coating composition, and examples thereof include acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), cyclohexanone Ketones, methyl cellosolve, ethylene glycol dibutyl ether, and butyl cellosolve acetate. The amount of the solvent to be used is not particularly limited, but is preferably 10 to 500 parts by weight per 100 parts by weight of the polymer compound.

The magnetic coating layer-forming composition may further contain additives such as a pH adjusting agent, an ion scavenger, a viscosity adjusting agent, a thixotropic agent, an antioxidant, a heat stabilizer, a light stabilizer, an ultraviolet absorber, a colorant, a dehydrating agent, , Antifungal agents, antiseptics, and the like may be added.

The pH adjuster is not particularly limited, and for example, an acidic filler such as silica and an alkaline filler such as calcium carbonate can be used. These pH adjusting agents may be used alone or in combination of two or more. The ion trapping agent is not particularly limited as long as it can reduce the amount of ionic impurities. Examples of the ion trapping agent include aluminosilicate, titanium oxide hydrate, bismuth oxide, zirconium phosphate, titanium phosphate, hydrotalcite , Ammonium molybdophosphate, hexacyano zinc, and organic ion exchange resins. These ion capturing agents may be used alone or in combination of two or more. The specific kinds of the other additives are not specifically described because they can use known ones.

The viscosity of the magnetic coating layer forming composition may be 5,000 to 30,000 cps. When the magnetic coating layer forming composition has a viscosity of less than 5,000 cps, it may be difficult to form a magnetic coating layer by flowing down from the antenna portion when the magnetic coating layer forming composition is applied to the antenna portion. When the viscosity of the magnetic coating layer forming composition is less than 30,000 cps , The surface of the magnetic coating layer may not be smooth and it may be difficult to form a desired type of magnetic coating layer.

The thickness of the magnetic coating layer may be 10 to 300 mu m. If the thickness of the magnetic coating layer is less than 10 mu m, the magnetic coating layer may peel off from the antenna portion or the magnetic shielding property may be deteriorated. If the thickness of the magnetic coating layer is more than 300 mu m, have.

Referring to FIG. 1, the antenna unit 1500 includes heterogeneous antennas 1530, 1540, and 1550. Each of the antennas included in the antenna unit 1500 may be formed in a polygonal coil shape such as a circular shape, an elliptical shape, a spiral shape, or a quadrangular shape wound in a clockwise or counterclockwise direction, or may be formed by etching a metal foil such as a copper foil have. Or may be formed in a printed pattern on one side of the circuit board 1510. The respective antenna types, sizes, materials, etc. may be designed differently according to the purpose. Also, the number of antennas included in the antenna unit 1500 may be designed differently according to the purpose, and a single antenna may be provided for each function or application, or a function for one function, for example, The present invention is not limited to the number of antennas.

In addition, the heterogeneous antennas 1530, 1540, and 1550 included in the embodiment of the present invention may be antennas having different frequency bands at different operating frequencies or antennas having different functions. For example,

A first antenna having a frequency band of 100 to 350 kHz as an operating frequency, a second antenna having a frequency band of 6.78 MHz as an operating frequency, and a third antenna having a frequency band of 13.56 MHz as an operating frequency Which may have different operating frequencies. In another example, the heterogeneous antennas may include at least two types of antennas for a short distance communication (NFC), an antenna for magnetic security transmission (MST), and an antenna for wireless power transmission (WPT) .

1, the antenna unit 1500 includes an NFC antenna 1550, an MST antenna 1540, and a WPT antenna 1530 pattern-printed on a circuit board 1510, Since the NFC antenna 1550 has a frequency band higher than that of the WPT antenna 1530, the NFC antenna 1550 is formed as a conductive pattern in a rectangular shape with a minute line width along the outer periphery of the circuit board 1510, And since it uses a lower frequency band than the NFC antenna 1530, it can be formed with a line width wider than the line width of the NFC antenna 1550 inside the NFC antenna 1550. An MST antenna 1540 using a lower frequency band than the NFC antenna 1550 may be located between the NFC antenna 1550 and the WPT antenna 1530. However, And the number of antennas included in one circuit board 1510 can be changed.

The NCF antenna 1550 may serve as a receive antenna or a transmit antenna for transmitting or receiving data to enable file transmission, mobile settlement, etc., through signals transmitted or received. The specific material, shape, thickness, length, etc. of the NCF antenna 1550 may be the same as that of a normal NCF antenna, and the present invention is not particularly limited thereto.

The MST antenna 1540 may serve as a receiving antenna or a transmitting antenna for transmitting or receiving data for electronic approval via a magnetic signal transmitted or received .

The MST antenna 1540 may be formed of, for example, an inductor, and the inductor may be a loop having at least one winding. Preferably, the loop may comprise more than 20 windings. For example, as shown in FIG. 2, the loop may have an outermost width w of 15 to 50 mm, and a width d of the loop formed by the loop may be 3 mm. At this time, the loop may be formed such that the area formed by the loop is within 600 to 1700 mm 2.

Coating, flow coating, casting, printing, transfer, brushing, dipping, and spraying may be used to coat the magnetic coating layer forming composition on one surface of the antenna unit. May be used.

In a second step, the magnetic coating layer forming composition is solidified to form a magnetic coating layer on one side of the antenna portion.

The method for solidifying the magnetic coating layer-forming composition is not particularly limited. For example, the solidification reaction can be used without any limitation, such as solidification by drying or curing by solvent vaporization, solidification by curing by chemical reaction through heat / light / water, or solidification by cooling after heat melting such as cooling have.

As the magnetic coating layer forming composition solidifies, the antenna pattern is buried and a magnetic coating layer is integrally formed on the antenna portion. Accordingly, there is an effect that the antenna portion and the magnetic coating layer can be bonded without a separate bonding step.

2, an antenna module according to an embodiment of the present invention includes an antenna unit 100 including an antenna pattern and magnetic particles 10 dispersed in the polymer 20, And a magnetic coating layer 200 integrally formed on the antenna unit 100. Since the antenna module does not require a separate adhesive layer, it is possible to realize a slim antenna module. In addition, it is possible to prevent the phenomenon of peeling between layers due to the excellent adhesive force, and to further improve the antenna characteristics.

Meanwhile, the antenna module according to another embodiment of the present invention includes an NFC antenna unit including an antenna pattern for performing short-range wireless communication, and a magnetic coating layer formed by burying the antenna pattern unit and integrally formed with the NFC antenna unit. The NFC antenna portion and the magnetic coating layer will be described with reference to the above description.

The NFC antenna unit may further include a heat dissipation unit disposed on the same plane as the NFC antenna unit, for dissipating heat transferred from the heat source or for dispersing heat locally concentrated.

Referring to FIG. 3, the NFC antenna pattern 120 may be locally formed in a part of the heat-radiating sheet 110. This is because when the heat generating component disposed on one side of the heat radiation sheet 110 is disposed on a part of the heat radiation sheet 110, the NFC antenna pattern 120 is not positioned directly above the heat generating component, The NFC antenna pattern 120 can be prevented from being damaged due to the heat transmitted from the heat source. Here, the heat generating component may be a heat generating component excluding the battery.

For example, the NFC antenna pattern 120 may be formed to lie on one side of the heat-radiating sheet 110 (see FIG. 3A), or may be formed to be positioned on the center side of the heat- (See FIG. 3B). In addition, the NFC antenna pattern 120 may be formed along the width direction or the longitudinal direction of the heat radiation sheet 110 so as to have a width or length substantially equal to the width or length of the heat radiation sheet 110 3d), or they may be provided in a mutually combined form (see FIG. 6E).

However, the formation position of the NFC antenna pattern 120 is not limited thereto, and may be changed to an appropriate position according to design conditions. It is noted that the NFC antenna pattern 120 may be formed directly on one surface of the heat-radiating sheet 110.

The heat dissipating unit is disposed between a heat generating part and other parts in a portable electronic device such as a mobile phone, a PDA, a PMP, a tablet, a multimedia device, or the like to emit heat generated from the heat generating part. The heat dissipation unit may be a plate-like member having a thermal conductivity of 200 or more, such as copper or aluminum, or may be formed by mixing two or more metal materials such as copper or aluminum.

Hereinafter, exemplary embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are intended to aid understanding of the present invention, and the present invention is not limited by the following experimental examples.

≪ Example 1 >

The ferrite powder powder showing a magnetic permeability (mu) of 150 was ball-milled and pulverized to have a particle size of 53 mu m. Then, 90 g of pulverized ferrite magnetic particles and 10 g of EDPM as a thermoplastic adhesive component were mixed in a 25 ml solvent and mixed to prepare a magnetic coating layer forming composition having a viscosity of 7,000 cps.

The width of the bottom surface of the groove to constitute the NFC antenna pattern is 1 mm and the distance d between the grooves adjacent to each other is 0.3 mm and the antenna including an integral heat dissipation unit as shown in FIG. Ready.

Then, the magnetic coating layer-forming composition was applied onto the antenna through a casting process. Thereafter, the magnetic coating layer was formed by thermocompression at a rate of 3 RPM under a temperature of 120 캜 to produce an antenna module.

≪ Comparative Example 1 &

An antenna module was fabricated in the same manner as in Example 1 except that the magnetic coating layer forming composition was applied on a PET substrate other than an antenna in the formation of a magnetic coating layer and solidified. Thereafter, the magnetic coating layer separated from the PET substrate was separated and placed on the antenna, and then the antenna module was manufactured by the same method except that the antenna module was manufactured by thermocompression at a rate of 1 RPM at a temperature of 120 ° C.

≪ Comparative Example 2 &

An antenna module was fabricated in the same manner as in Example 1 except that the magnetic coating layer forming composition was applied on a PET substrate other than an antenna in the formation of a magnetic coating layer and solidified. Then, an EPDM layer having a thickness of 2 탆 was formed on the antenna, and a magnetic coating layer solidified from the PET substrate was disposed on the antenna on which the EPDM layer was formed. Thereafter, the antenna module was manufactured by the same method except that the antenna module was manufactured by thermocompression at a rate of 1 RPM under a temperature of 120 캜.

≪ Comparative Example 3 &

An antenna module was fabricated in the same manner as in Example 1 except that the magnetic coating layer forming composition was applied on a PET substrate other than an antenna in the formation of a magnetic coating layer and solidified. An EPDM primer layer having a thickness of 2 탆 was formed on the antenna, and then a magnetic coating layer solidified from the PET substrate was placed on the antenna on which the EPDM primer layer was formed. Thereafter, the antenna module was manufactured by the same method except that the antenna module was manufactured by thermocompression at a rate of 1 RPM under a temperature of 120 캜.

Experimental Example  1 - Evaluation of Peeling Characteristics of Antenna Module

As shown in [Table 1], the antenna module manufactured according to Example 1 and Comparative Examples 1 to 3 was subjected to a force of 100 gf / cm < ² >

Whether or not peeling 30 minutes past 60 minutes elapsed 90 minutes past 120 minutes elapsed Comparative Example 1 ○ ○ ○ ○ Comparative Example 2 × ○ ○ ○ Comparative Example 3 × × × ○ Example 1 × × × ×

As can be seen from Table 1, the antenna module according to the first embodiment of the present invention has excellent adhesive strength to the antenna portion and the magnetic coating layer, even though there is no separate adhesive layer.

In the case of Comparative Example 2, the magnetic coating layer-forming composition formed between the antenna portion and the magnetic coating layer was melted by thermocompression bonding.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And changes are possible.

10: magnetic particles 20: polymer
100: antenna unit 200: magnetic coating layer

Claims (23)

A first step of applying a composition for forming a magnetic coating layer containing magnetic particles to one surface of an antenna portion including an antenna pattern; And
And a second step of solidifying the magnetic coating layer forming composition to form a magnetic coating layer formed on one surface of the antenna unit so as to be integrated with the antenna unit to improve antenna characteristics and focus a magnetic flux toward the antenna. . The method according to claim 1,
The first step is an antenna module using at least one of blade coating, flow coating, casting, printing, transfer, brushing, dipping and spraying. ≪ / RTI > The method according to claim 1,
Wherein the magnetic particles comprise a soft magnetic material. The method of claim 3,
Wherein the soft magnetic material body comprises a soft magnetic metal material or ferrite. 5. The method of claim 4,
The metal soft magnetic body may be at least one selected from the group consisting of Ni-Co alloy, Fe-Ni alloy, Fe-Cr alloy, Fe-Al alloy, Fe-Si alloy, Fe- , An Fe-Cr-Si alloy, and an Fe-Si-B-Cu-Nb alloy,
Wherein the ferrite is selected from the group consisting of Mn-Zn ferrite, Ni-Zn ferrite, Ni-Co ferrite, Mg-Zn ferrite, Cu-Zn ferrite and Cobalt substituted Y or Z hexagonal ferrite. A method for manufacturing an antenna module, the method comprising: The method according to claim 1,
Wherein the magnetic coating layer-forming composition comprises a natural polymer compound and a synthetic polymer compound. The method according to claim 6,
Wherein the synthetic polymer compound is a rubber compound. 8. The method of claim 7,
Wherein the rubber compound is a terpolymer of ethylene, propylene and a diene monomer copolymerized. The method according to claim 1,
Wherein the magnetic coating layer forming composition has a viscosity of 5,000 to 30,000 cps. An antenna unit including an antenna pattern; And
And a magnetic coating layer including magnetic particles dispersed in the polymer and embedded in the antenna pattern to be integrally formed on the antenna portion. 11. The method of claim 10,
Wherein the magnetic particles comprise a soft magnetic material. 12. The method of claim 11,
Wherein the soft magnetic material body comprises a soft magnetic metal material or ferrite. 13. The method of claim 12,
The metal soft magnetic material body
Fe-Si alloy, Fe-Si alloy, Fe-Cr alloy, Fe-Si alloy, Fe-Si alloy, Si-based alloy, Fe-Si-B-Cu-Nb-based alloy,
Wherein the ferrite is selected from the group consisting of Mn-Zn ferrite, Ni-Zn ferrite, Ni-Co ferrite, Mg-Zn ferrite, Cu-Zn ferrite and Cobalt substituted Y or Z hexagonal ferrite. Antenna module comprising more than one kind. 11. The method of claim 10,
Wherein the magnetic coating layer has a thickness of 10 to 300 mu m. 11. The method of claim 10,
Wherein the antenna comprises at least one selected from the group consisting of an antenna for wireless power transmission (WPT), an antenna for short range communication (NFC), and an antenna for magnetic security transmission (MST). 16. The method of claim 15,
The antennas
A first antenna having a frequency band of 100 to 350 kHz as an operating frequency, a second antenna having a frequency band of 6.78 MHz as an operating frequency, and a third antenna having a frequency band of 13.56 MHz as an operating frequency . 11. The method of claim 10,
Wherein the magnetic coating layer is formed by solidifying a magnetic coating layer forming composition comprising a natural polymer compound and a synthetic polymer compound. 18. The method of claim 17,
Wherein the synthetic polymer compound is a rubber compound. 19. The method of claim 18,
Wherein the rubber compound is a terpolymer of ethylene, propylene and a diene monomer copolymerized. An NFC antenna unit including an antenna pattern for performing short-range wireless communication; And
And a magnetic coating layer embedded in the antenna pattern portion and formed integrally with the NFC antenna portion. 21. The method of claim 20,
Further comprising a heat dissipation unit disposed on the same plane as the NFC antenna unit and configured to dissipate heat that is transmitted from the heat source or to distribute heat locally concentrated. An antenna unit including at least two antennas selected from the group consisting of an antenna for wireless power transmission (WPT), an antenna for short range communication (NFC), and an antenna for magnetic security transmission (MST); And
And a magnetic coating layer including Mg-Fe ferrite magnetic particles dispersed in the polymer, wherein the magnetic coating layer is formed integrally on the antenna portion by burying the antenna pattern. 23. The method of claim 22,
Wherein the Mg-Fe-based ferrite magnetic particles are Ni-Zn-Cu-Mg-Fe-based ferrite.

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