WO2018097676A1

WO2018097676A1 - Antenna core for contactless electronic payment and contactless electronic payment module including same

Info

Publication number: WO2018097676A1
Application number: PCT/KR2017/013595
Authority: WO
Inventors: 이동훈; 장길재
Original assignee: 주식회사 아모센스
Priority date: 2016-11-25
Filing date: 2017-11-27
Publication date: 2018-05-31
Also published as: KR20180059384A; KR102001432B1

Abstract

Provided is an antenna core for contactless electronic payment. The antenna core for contactless electronic payment according to an embodiment of the present invention comprises a magnetic substance disposed inside an antenna coil for contactless electronic payment and containing an Fe-based alloy. According to the present invention, despite being thin and light in weight, it is possible to have an excellent transmission/reception efficiency of an electronic payment signal and an extended transmission/reception distance of the signal. In addition, a contactless electronic payment module implemented according to the present invention can be widely applied to various portable electronic devices since the module is light in weight, thin, short and small in size. Furthermore, in a portable device equipped with the same, since transmission/reception of an electronic payment signal is not specified on any one side of the device and the signal can be recognized on both sides of the device, there is no inconvenience of a portable device having to be located in only one specific direction in a contactless electronic payment process, so that the present invention can be widely applied to various fields and related devices which require contactless electronic payment.

Description

Antenna core for contactless electronic payment and contactless electronic payment module including the same

The present invention relates to an antenna core, and more particularly, to a non-contact electronic payment antenna core having an excellent transmission / reception efficiency, an extended signal recognition range and a range even though it is thin and light, and a non-contact electronic payment module including the same. .

In the magnetic card, which is a conventional payment method, a magnetic stripe (MS) including card data such as payment information is formed.

Here, the magnetic stripe is made of magnetic particles, and data is recorded according to the order of magnetic polarity of such magnetic particles. This card data is read from the magnetic stripe by the POS by moving the magnetic card to the sensing opening in which the leader head of the point of sale (POS) is formed. At this time, as the magnetic card moves, the magnetic stripe forms a magnetic field in the sensing opening of the reader head, and the reader head can read the card data by converting the magnetic field thus formed into an electrical signal.

On the other hand, as smart phones are becoming more common and their functions are improved, payment methods using smart phones are emerging. Recently, with the introduction of an electronic payment function using a mobile terminal such as Apple Pay and Samsung Pay, it is required to have an electronic payment antenna in the mobile terminal. The antenna provided in the portable terminal transmits and receives a payment signal with a magnetic field formed to perform a contactless card payment function. In order to improve such a function, research on a combination of an antenna and a magnetic core has continued.

In addition, in recent years, according to the trend of light and small size of the portable terminal market, a module for performing a contactless card payment function has also been developed to be smaller and lighter. However, in order to improve the contactless card payment function, the magnetic core provided inside the antenna should be thinner / smaller and lighter in weight. When the magnetic core is miniaturized and thinned, the payment signal recognition performance and recognition distance can be expressed to the desired level. There is a problem that the payment function is difficult to perform smoothly. In addition, when the magnetic core is provided to ensure sufficient payment signal recognition performance and recognition distance, it is difficult to miniaturize / thin the magnetic core, which makes it difficult to mount the portable terminal device.

Accordingly, there is an urgent need to develop a magnetic core capable of implementing a contactless card payment function with excellent performance and at the same time implementing a small / thin and lightweight contactless card payment module.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can achieve excellent transmission efficiency and transmission distance of an electronic payment signal, and at the same time, it is miniaturized, thinned, and lightweight, and is suitable for mounting in a portable terminal. An object of the present invention is to provide a core and a non-contact electronic payment module including the same.

Another object of the present invention is to provide an electronic device including a portable device employing the non-contact electronic payment module as described above.

In order to solve the above problems, the present invention provides a non-contact electronic payment antenna core comprising a; a magnetic body disposed inside the non-contact electronic payment antenna coil, containing a Fe-based alloy. According to this, the characteristic of an antenna core can be improved.

According to an embodiment of the present invention, the Fe-based alloy is a three-element alloy containing iron (Fe), silicon (Si) and boron (B) or iron (Fe), silicon (Si), boron (B) , Copper (Cu) and niobium (Nb) may be a five-element alloy.

In addition, the magnetic material containing the Fe-based alloy may be a Fe-based alloy ribbon sheet or formed of debris obtained by crushing the Fe-based alloy ribbon sheet into a plurality of fine pieces in order to prevent physical properties of the antenna core, high magnetic permeability More preferably, the Fe-based alloy ribbon sheet may be implemented.

In addition, the antenna core may be configured by stacking a plurality of magnetic bodies, an adhesive layer is interposed between the stacked magnetic bodies, and two to four magnetic bodies may be provided.

In addition, the magnetic material may have a thickness of 15 to 35 ㎛ single layer.

In addition, the antenna core includes a first protection portion covering the upper and lower portions of the magnetic material, and a second protection portion extending from the first protection portion and forming a rim with a predetermined width and enclosing the magnetic body side to improve corrosion resistance. A protective member may be further provided, and the width of the second protective part may be 100 μm to 1 mm, and the thickness of the protective member may be 5 to 100 μm.

In addition, the present invention is a non-contact electronic payment antenna core according to the present invention; And a contactless electronic payment antenna formed by winding the antenna core.

According to an embodiment of the present invention, when the total thickness of the magnetic material provided in the antenna core is 72㎛, the relative gain with respect to the inductance (Ls) of the contactless electronic payment antenna may be 5 or more, more preferably May be 5-15.

In addition, the present invention provides a portable device including a non-contact electronic payment module according to the present invention as a receiving module.

The present invention also provides an electronic device including a non-contact electronic payment module according to the present invention.

The non-contact electronic payment antenna core of the present invention can have an excellent transmission and reception efficiency, an extended transmission and reception distance and a wide recognition range of the electronic payment signal even though it is thin and light. In addition, the contactless electronic payment module implemented in this way can be implemented in various sizes, such as a thin and light and small size can be widely applied to portable electronic devices. Furthermore, in the case of a portable device having the same, the electronic payment signal is not transmitted or received on any one side of the device, and both sides of the device can recognize the signal, thereby positioning the mobile device only in one specific direction in the non-contact electronic payment process. As there is no inconvenience to be made, it can be widely applied to various fields and related devices where contactless electronic payment is required.

1 is a partial cross-sectional view of a non-contact electronic payment antenna core according to an embodiment of the present invention;

2 is a partial cross-sectional view of a contactless electronic payment antenna core according to another embodiment of the present invention;

3a and 3b is a perspective view and a cross-sectional view taken along the line X-X 'of a non-contact electronic payment module according to an embodiment of the present invention;

4 is a partial cross-sectional view of a non-contact electronic payment module according to another embodiment of the present invention;

5 is a perspective view of a non-contact electronic payment module according to an embodiment of the present invention;

6 is a partial plan view of a non-contact electronic payment module according to an embodiment of the present invention;

7 is an exploded perspective view of FIG. 6, and

Figure 8 is an antenna core included in an embodiment of the present invention, the single layer height is 24㎛, the composition is Fe ₇₅ _. _{_{_{_{1 Si 17 B 4 Cu 1 Nb}}}} 2 .9 , and the heat treatment is in the ribbon sheet is not crushed, and the laminate 4, the total thickness 105㎛ interposed 3㎛ the double-sided adhesive thickness between the respective ribbon sheet antenna core frequency band It is a complex permeability graph.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.

As shown in FIG. 1, the non-contact electronic payment antenna core 100 according to the embodiment of the present invention includes a magnetic body 110 including a Fe-based alloy, and a protective member covering the magnetic body 110 ( 120) may be further included.

The magnetic body 110 improves the characteristics of the antenna coil for contactless electronic payment, and for this purpose includes a Fe-based alloy as a magnetic body. Generally, as a magnetic material, mumetal and ferrite may be used, for example, a frequency band used for contactless electronic payment may be several hundreds of frequencies, for example, 5 Hz to 100 Hz. When the low frequency band, the contactless electronic payment antenna and the antenna core are disposed adjacent to the metal cover of the mobile device having the conductive metal cover, the above magnetic material may be used in both the front and the rear of the mobile device having the conductive metal cover. In consideration of the fact that payment signals may be difficult to transmit and receive, and the transmission / reception efficiency of electronic payment signals, extended transmission / reception distances, and the weight / thickness of the magnetic materials required to satisfy a wide signal recognition range, such magnetic materials may be It may be less suitable as a magnetic material of the antenna core for contactless electronic payment than the Fe-based alloy. However, the Fe-based alloy used as the magnetic material of the present invention has an advantage of sufficiently expressing desired physical properties in a low frequency band even when implemented in a very thin thickness. In particular, in the case of Fe-based alloys because the thickness of the ribbon produced is very thin, the thickness does not increase even when stacked, and when stacked, antenna performance coefficient can be improved by lowering the AC resistance generated from the antenna. It is very advantageous to greatly improve this. In addition, as light weight is secured, it is very suitable to be adopted in a portable device, and even when the cover of the portable device is a conductive metal, it is more suitable in that an electronic payment signal can be transmitted and received both in the front and rear of the device.

The Fe-based alloy can be used without limitation in the case of the Fe-based alloy known as soft magnetic material. However, silicon steel, for example, may have excellent physical properties compared to the above-described magnetic materials such as ferrite in the desired frequency band for non-contact electronic payment, and has the lowest cost, and thus can be easily used. Since the characteristic is not high, the magnetic field signal may be generated and amplified by the required intensity alone, and the signal may not be easily recognized. Preferably, the Fe-based alloy is a three-element Fe alloy containing silicon and boron, or a five-element Fe alloy including silicon, boron, copper, and niobium (Nb). This can be very advantageous in contrast to the degree of manifestation of the specific properties. The tri-element Fe alloy may further add elements, such as chromium (Cr), cobalt (Co), nickel (Ni), etc. to the base composition of the element alloy to improve other properties, for example, corrosion resistance. When the Fe-based alloy is a Fe-Si-B-based ternary alloy, it may be an alloy having preferably 70 to 90 at% of Fe. When the Fe content is increased, the saturation magnetic flux density of the alloy may be increased, but a crystalline alloy may be prepared. In addition, the Si and B elements are responsible for increasing the crystallization temperature of the alloy to make the alloy more easily amorphous, the content of the Si and B elements is specifically 10 to 27 at%, Si is 3 to 12 at% may be included, but the present invention is not limited thereto, and may be modified according to the desired physical properties.

In addition, the five-element Fe alloy further includes copper and niobium in addition to the above-described main elements of the three-element-based alloy. The copper improves the corrosion resistance of the Fe-based alloy and prevents the size of the crystal from growing even when the crystal is formed. At the same time, the magnetic properties such as permeability can be improved. The copper is preferably included in the alloy 0.01 ~ 10at%, if less than 0.01at% expression of the effect obtained by the copper may be insignificant, if it exceeds 10at% amorphous alloy is produced It can be difficult.

In addition, the niobium (Nb) may improve the magnetic properties such as permeability, it is preferably included in the alloy 0.01 ~ 10at%, if included in less than 0.01at% the expression of the effect obtained due to niobium is It may be insignificant and, if it exceeds 10 at%, it may be difficult to form an amorphous alloy.

When the Fe-based alloy is a five-element alloy further including copper and niobium, preferably Si and B may be included in the 10 to 30 at% alloy, and Fe may be included in the balance. When the Fe content is increased, the saturation magnetic flux density of the alloy may be increased, but a crystalline alloy may be prepared. The content of Si and B may increase the crystallization temperature of the alloy to more easily amorphous the alloy. The content of Si and B may be specifically included in the case of Si 10 ~ 27at%, B 3 ~ 12at%, but is not limited to this may be changed according to the degree of the desired physical properties.

In addition, the Fe-based alloy may be derived from Fe-based amorphous alloy ribbon, and may be heat-treated to control the permeability to the desired level or to maximize the permeability, wherein the Fe-based alloy heat-treated the amorphous phase according to the composition Or may comprise nanocrystals. The crystal phase of the Fe-based alloy may vary depending on the composition, composition ratio and / or heat treatment temperature / time of the alloy.

In addition, as shown in FIG. 1, the antenna core 100 may include a single layer of magnetic material 110. The magnetic body 110 may have a thickness of 15 μm to 35 μm. In addition, the magnetic body 110 may be a sheet shape cut to a predetermined width / length, as may be derived from the Fe-based ribbon sheet as described above. However, the shape of the magnetic body 110 is not limited thereto, and may be appropriately changed according to the shape of the antenna for contactless electronic payment in which the antenna core is disposed.

In addition, the antenna core 100 has a high permeability in the frequency band of the desired signal may be good in terms of electronic payment signal, transmission capability and recognition capability. The real part of the complex permeability of the magnetic material in the frequency band of 5 GHz to 100 GHz may be preferably 6,000 or more, and more preferably 8,000 to 22,000. In addition, the complex permeability real part in the 10 GHz frequency band may be 17,000 or more, more preferably 17,000 to 20,000, the imaginary part may be 5,000 or less, and more preferably 4,000 or less.

In addition, as shown in FIG. 2, a plurality of

magnetic bodies

112, 113, and 114 may be stacked on the antenna core 102, and an adhesive layer 140 may be further interposed between the stacked

magnetic bodies

112, 113, and 114. In some cases, the transmission / reception distance of the electronic payment signal is required to be further extended or have a wide recognition range, and it may be difficult to satisfy the high physical properties required by the magnetic material of a single layer. Accordingly, as shown in FIG. 2, the antenna core 102 includes a plurality of

magnetic bodies

112, 113, and 114, thereby achieving a physical property increasing effect such as using a magnetic material having a high permeability, and providing a noncontact electronic payment antenna. While the inductance is further improved, the specific resistance can be increased relatively to increase the quality index.

Antenna core 102 including a plurality of magnetic material is preferably 2 to 7 magnetic material, more preferably slim and light to implement a non-contact electronic payment module, to facilitate mounting on a thin and thin portable device 2 It may be provided with four magnetic material. On the other hand, by increasing the number of the magnetic material indefinitely may not achieve the desired level of transmission efficiency and transmission distance of the electronic payment signal, and if the number of the magnetic material increases it may not be mounted on the portable device. In addition, the degree of inductance increase of the non-contact electronic payment antenna may be insignificant, and the width of the quality index improvement may be small, and the thickness may be thick, which may be undesirable for thinning the antenna core.

In addition, the plurality of

magnetic bodies

112, 113, and 114 may have the same or different compositions of the Fe-based alloys included in the respective magnetic bodies. In addition, even if the composition is the same, the magnetic permeability of each of the magnetic material may be different due to different heat treatment time. In addition, the thickness of each of the magnetic bodies may be the same or different from each other according to the purpose.

In addition, an adhesive layer 140 may be further interposed between the stacked

magnetic bodies

112, 113, and 114. The adhesive layer 140 may be formed of a known thermosetting or thermoplastic adhesive. For example, the adhesive may include an adhesive component such as acrylic, urethane, and epoxy. In addition, the adhesive layer 140 may be formed of a double-sided adhesive member having an adhesive with a predetermined thickness on both sides of a substrate such as a support film, or may be formed of only an adhesive without a substrate. In addition, the thickness of the adhesive layer 140 may be 1 ~ 20㎛, but is not limited thereto.

On the other hand, according to the application of the non-contact electronic payment module, the above-described magnetic material is applied to the external force such as frequent vibrations in order to minimize the change in the physical properties due to the micro-fragmentation of the magnetic material when there is a risk of cracking, fracture of the magnetic material, the antenna core Since implementing the Fe-based alloy ribbon sheet may be provided with a magnetic body formed of fragments that are broken into a plurality of fine pieces. In this case, even when an external force is continuously applied to the antenna core, additional microfragmentation of the magnetic material is prevented, thereby minimizing fluctuations in physical properties set at the beginning. However, in the Fe-based alloy ribbon sheet manufactured in the same composition and the same conditions, the magnetic properties required for non-contact electronic payment after crushing may be lowered than before crushing, so that in order to express excellent magnetic properties in non-contact electronic payment Preferably, the antenna core may be implemented by a magnetic material that is not broken.

Meanwhile, as shown in FIG. 1, the upper and lower portions of the magnetic body 110 may further include a protection member 120. The protection member 120 serves to physically and chemically protect the magnetic material from the external environment. The protective member 120 may be a protective film or a protective coating layer. Specifically, the protective member 120 illustrated in FIGS. 3A and 3B is implemented as a protective film, and is used to attach the base film 120b ₂ , the base film 120b ₂ , and the magnetic body 110 as a protective film. The adhesive layer 120b ₁ may be included. The base layer 120b ₂ may be a protective film that is typically provided to protect the magnetic material of the antenna core, and may be heat resistant, mechanical strength, and resistance to protect the magnetic material 110 against physical and chemical stimuli applied from the outside. In the case of a film whose material is chemically secured, it can be used without limitation. As a non-limiting example, polyethylene, polypropylene, polyimide, crosslinked polypropylene, nylon, polyurethane-based resin, acetate, polybenzimidazole, polyimideamide, polyetherimide, polyphenylene sulfide (PPS). Polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) and polychlorotrifluoroethylene ( PCTFE), polyethylenetetrafluoroethylene (ETFE), and the like, and these may be used alone or in combination. In addition, the base layer 120b ₂ may have a thickness of 1 to 100 μm, preferably 10 to 30 μm, but is not limited thereto.

In addition, the adhesive layer 120b ₁ may be formed of a conventional adhesive having an adhesive force, and the present invention is not particularly limited thereto. The adhesive layer 120b ₁ may have a thickness of 3 to 50 μm, but the thickness of the adhesive layer 120b ₁ is not limited thereto.

However, in order to ensure the reliability of the corrosion resistance according to the salt spray, the protection member 120 as shown in Figure 3a and 3b is the first protection portion (A) and the first protection portion (covering the upper and lower portions of the magnetic body 110) ( It may include a second protective portion (B) extending from A), forming a rim with a predetermined width (d) and surrounding the magnetic body 110 side. Corrosion resistance can be prevented due to the brine that can be introduced into the side through the second protection portion (B), preferably for this purpose, the width of the second protection portion (B) may be 100㎛ ~ 1mm have.

Meanwhile, as shown in FIG. 4, the protection member 120 ′ may be a protective coating layer formed of a single layer without a separate adhesive layer. In this case, the protective coating layer may have protective properties, adhesion (or adhesion) properties with the magnetic body, and / or electrical properties capable of insulating the magnetic body. The protective coating layer can be used without limitation in the case of a material that can express the adhesion to the magnetic body without a separate adhesive layer, for example, may be ethylene propylene rubber (Ex. EPDM). In this case, the main component of the protective coating layer may be a crosslinking or non-crosslinking component, and in the case of the crosslinking component, it may be crosslinked through a crosslinking agent to form a protective coating layer, and in the case of the noncrosslinking component, the solvent may be dried or solidified in a molten state. Through the protective coating layer can be formed. At this time, the protective coating layer is applied to a magnetic body by a method such as a comma coater, screen printing, dipping, spraying, etc., a composition for forming a protective coating layer according to the type of the main component of the protective coating layer. The protective coating layer can be formed by a known method. On the other hand, the method of manufacturing the protective coating layer is not limited to this, it is possible to form a powder-based dimer through a parallel coating to form a protective film in the form of a polymer using a chemical vapor deposition method. The paraline coating has the advantage of forming a uniform protective layer.

The non-contact electronic payment antenna core according to the embodiment of the present invention described above may be manufactured including (1) cutting the Fe-based alloy ribbon to a predetermined width.

Composition and composition ratio of the Fe-based alloy ribbon is the same as described above will be described below with a focus on the manufacturing method. The Fe-based alloy ribbon may be an amorphous Fe-based alloy ribbon prepared by a known method such as quench solidification (RSP) by melt spinning, or an Fe-based alloy ribbon after heat treatment of the amorphous Fe-based alloy ribbon, More preferably, it may be a heat-treated Fe-based alloy ribbon with a maximum improvement in permeability. At this time, the heat treatment temperature may be differently selected according to the composition, composition ratio, and magnetic permeability of the desired magnetic material. For example, in order to express excellent properties over a certain level in the desired operating frequency range, for example, Fe-Si-B In the case of the alloy, it may be heat-treated at a temperature of 300 to 600 ° C., more preferably 400 to 500 ° C., more preferably at a temperature of 440 to 480 ° C. for 30 minutes to 2 hours in an air atmosphere or a nitrogen atmosphere. Can be processed. In addition, the Fe-Si-B-Cu-Nb-based alloy may be heat treated at a temperature of 300 to 700 ° C., more preferably 500 to 700 ° C. for 30 minutes to 2 hours in an air atmosphere or a nitrogen atmosphere. If the heat treatment temperature is less than 300 ℃ it may be difficult to achieve the desired permeability, the heat treatment time can be extended. In addition, the magnetic permeability of the magnetic material may be significantly lowered when the heat treatment temperature exceeds 700 ° C.

In addition, if a plurality of magnetic bodies are to be provided, the Fe-based alloy ribbon may be laminated in a desired number and manufactured as a laminate. In this case, an adhesive layer may be provided between the stacked Fe-based alloy ribbons. In the case of manufacturing an antenna core by stacking a plurality of magnetic bodies, an unheated Fe-based alloy ribbon may be laminated and then subjected to a heat treatment process, or the heat-treated Fe-based alloy ribbon may be laminated through an adhesive layer.

After step (1), a single layer or laminated Fe-based alloy ribbon may be subjected to a process of punching in a desired shape and size.

Thereafter, as a step (2), a step of forming a protection member to cover the punched monolayer or the stacked Fe-based alloy ribbon may be performed.

As an example, when the protective member is a protective film, a protective film with an adhesive on one surface thereof is disposed on the upper and lower portions of the punched single layer or the laminated Fe-based alloy ribbon, and then laminated and laminated. It can be punched by a predetermined width / length larger than the size of the alloy ribbon to form a second protective portion (B) having an edge around the single-layer / laminated Fe-based alloy ribbon as shown in Figure 3a.

Alternatively, when the protective member is a protective coating layer, a protective coating layer is formed by coating an outer surface of the Fe-based alloy ribbon with a protective coating composition, or a Fe-based material is formed through a paraline coating method before forming the protective coating layer. The protective plating layer may be formed by polymerization and deposition on the outer surface of the alloy ribbon.

The antenna core according to an embodiment of the present invention manufactured by the above-described method may be disposed inside the antenna for contactless electronic payment and may be implemented as a contactless electronic payment module.

Referring to FIG. 5, the contactless electronic payment module 1000 includes a contactless electronic payment antenna 1200 formed by winding on an outer surface of the antenna core 1100.

The contactless electronic payment antenna 1200 may wind the antenna core in a clockwise or counterclockwise direction, wherein the axial direction of the antenna core and the angle of the wound antenna, the line spacing of the antenna coil, the diameter of the coil, and the like According to the present invention, the present invention is not particularly limited thereto. In addition, the material of the antenna may also use a known antenna material, for example, may be a copper wire. In addition, two or more contactless electronic payment antennas may be provided to wind the antenna core in different directions. For example, three antennas may be wound around three x, y, and z axes of the antenna core, and each wound antenna may be implemented to be orthogonal.

In addition, as shown in FIG. 6, the non-contact electronic payment module 2000 may be implemented to include a non-contact electronic payment antenna 2200 formed by winding a portion of the antenna core 2100 having a recess, and the antenna core ( A portion of the 2100 may include a perforated hole (P). The hole P may prevent distortion of the antenna core. The shape of the hole P is not limited, and the present invention is not particularly limited as the size may be appropriately changed according to the purpose.

In addition, according to an embodiment of the present invention, as shown in FIG. 6, the first antenna 2300 for performing heterogeneous functions on another area of the antenna core in which the non-contact electronic payment antenna 2200 is not formed is provided. It may be provided. In this case, the antenna core may simultaneously perform a function of concentrating magnetic flux to the first antenna 2300 and improving characteristics of the first antenna.

The first antenna 2300 may be at least one of an antenna for near field communication (NFC) and an antenna for wireless power transmission (WPT). As the specific shape, material, and structure of the first antenna may be appropriately changed in consideration of the function and operating frequency band of the first antenna, the present invention is not specifically limited thereto. In addition, the antenna for wireless power transmission (WPT) may be applied to the Qi method, or a part of the magnetic force lines generated in the permanent magnet may be applied to the wireless power transmission of the PMA method induced through an attractor (not shown). have. In addition, it can be applied to a magnetic resonance method in which wireless power transmission is performed at a frequency of several tens of kHz to 6.78 MHz. On the other hand, the above-described antenna for MST, antenna for WPT and antenna for NFC will be found that all can be used for the purpose of transmitting or receiving signals.

In addition, the non-contact electronic payment module 2000 as shown in FIG. 6 is an antenna core integrally implemented, or as shown in FIG. 7, the first antenna core 2100A and the second antenna core 2100B are coupled to the antenna core 2100. It may be implemented as. In this case, the second antenna core 2100B may be accommodated in an inner space of the contactless electronic payment antenna 2200 formed by winding the first antenna core 2100A and assembled into one antenna core 2100. To this end, the contactless electronic payment antenna 2200 is wound around the first antenna core 2100A in consideration of the thickness of the second antenna core 2100B to accommodate the second antenna core 2100B in the coil, The contactless electronic payment module 2000 may be integrally assembled by performing a winding process in a state where the protrusions of the first antenna core 2100A and the second antenna core 2100B overlap.

In addition, in FIG. 7, the first antenna core 2100A and the second antenna core 2100B may be Fe-based alloys having the same composition, or Fe-based alloys having heterogeneous compositions. For example, the first antenna core 2100A may be silicon steel, and the second antenna core 2100B may be a five-element-based alloy including Si, B, Cu, and Nb.

On the other hand, the antenna core according to an embodiment of the present invention described above, when the total thickness of the magnetic material provided is 72㎛, the relative gain with respect to the inductance (Ls) of the contactless electronic payment antenna is 5 or more, preferably 5 It may be 15. The relative gain of the noncontact electronic payment antenna inductance with respect to the electronic payment signal indicates the gain of the inductance obtained through the antenna core. The higher the relative gain, the more advantageous the expression of the desired physical property through the antenna core.

[expression]

Relative gain = antenna inductance for electronic payment (μH) with antenna core ÷ antenna inductance for electronic payment (μH)

That is, the relative gain is to measure the inductance of the electronic payment antenna through the LCR meter, for example, under the same frequency and voltage conditions for the same non-contact electronic payment antenna, which is different from the presence or absence of the antenna core. Through the antenna core can be clearly seen the effect.

According to an embodiment of the present invention, when the total thickness of the provided magnetic material is 72 μm, the relative gain of the antenna inductance satisfies 5 or more, thereby significantly reducing the characteristics of the non-contact electronic payment antenna. Even if the cover of the portable device having the antenna core is a conductive metal, both front and rear surfaces may transmit and receive signals for electronic payment in both directions. If the thickness of the magnetic material is 72 μm and the relative gain is less than 5, the properties of the antenna core may be insufficient to improve the characteristics of the non-contact electronic payment antenna, and the electronic payment distance may be very short. In the case of metal, the electronic payment signal can be transmitted / received in only one direction or the transmission / reception distance can be very short. In order to solve this problem, the thickness of the magnetic material provided in the antenna core should be increased. It is difficult to mount in a mobile device, which is very undesirable.

The above-described contactless

electronic payment module

1000 and 2000 may be included in an electronic device such as a POS terminal for transmitting and receiving a contactless electronic payment signal. In addition, the contactless electronic payment module (1000,2000) may be implemented as a portable device including a receiving module. The non-contact electronic payment module (1000,2000) according to the present invention can recognize the magnetic field signal is formed / transmitted in both directions rather than in one direction, it is necessary to position the device having it in a specific direction to recognize the signal As a result, there is an advantage that a non-contact electronic payment function can be easily used through transmission and reception of an electronic payment signal.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components Other embodiments may be easily proposed by changing, deleting, adding, and the like, but this will also fall within the spirit of the present invention.

Claims

A non-contact electronic payment antenna core disposed within the contactless electronic payment antenna coil, a magnetic material containing a Fe-based alloy.
The method of claim 1,

The Fe-based alloy is a three-element alloy including iron (Fe), silicon (Si) and boron (B) or iron (Fe), silicon (Si), boron (B), copper (Cu) and niobium (Nb) Antenna element for contactless electronic payment is a five-element-based alloy comprising a).
The method of claim 1,

The antenna core is a non-contact electronic payment antenna core formed by stacking a plurality of magnetic material.
The method of claim 3,

An antenna core for contactless electronic payment, wherein an adhesive layer is further interposed between the stacked magnetic bodies.
The method of claim 1,

The magnetic material is a non-contact electronic payment antenna core having a single layer thickness of 15 to 35㎛.
The method of claim 1,

The antenna core may include a first protective part covering upper and lower portions of the magnetic material;

The contactless electronic payment antenna further comprising a protection member extending from the first protection portion, the second protection portion to form a rim with a predetermined width to surround the magnetic body side to improve the corrosion resistance.
The method of claim 6,

The width of the second protective part is 100㎛ ~ 1㎜ non-contact electronic payment antenna core.
The method of claim 6,

The protective member has a thickness of 5 to 100㎛ non-contact electronic payment antenna core.
The method of claim 3,

The antenna core is an antenna core for contactless electronic payment in which two to four magnetic materials are stacked.
The non-contact electronic payment antenna core according to claim 1; And

And a contactless electronic payment antenna formed by winding the antenna core.
The method of claim 10,

The contactless electronic payment module having a relative gain of 5 or more relative to the inductance (Ls) of the contactless electronic payment antenna when the total thickness of the magnetic material provided in the antenna core is 72㎛.
A portable device comprising the contactless electronic payment module according to claim 10 as a receiving module.
Electronic device comprising a non-contact electronic payment module according to claim 10.