KR101318453B1 - A antenna-imbedded magnetic sheet for the near field wireless communication and it's fabrication method - Google Patents

Abstract

PURPOSE: A magnetic sheet integrated with an antenna for near field communication and a manufacturing method thereof are provided to increase the recognition distance of the antenna by increasing the inductance of the antenna. CONSTITUTION: A complex magnetic material sheet (200) includes metal particles and a binder. An antenna is composed of a metal wire (300). The metal wire includes a first part and a second part. The first part is buried in the complex magnetic material sheet with a preset depth. The second part protrudes from the complex magnetic material sheet to the outside.

Description

A antenna-imbedded magnetic sheet for the near field wireless communication and it's fabrication method.

The present invention relates to an antenna integrated magnetic sheet having a reduced thickness and an improved recognition distance by embedding antenna wires in a magnetic sheet used for improving a recognition distance of a short range wireless communication system, and a method of manufacturing the same.

Recently, the contactless information exchange method using near field communication (NFC) has been spread to various fields. NFC, which uses 13.56MHz AC magnetic field, is a more extended concept of RFID (Radio Frequency Identification), in which tag and reader are separated and only simple information can be identified, and each terminal performs both roles of tag and reader. This has the feature of being possible. Based on this, it is applied to various applications such as payment of public transportation fees, purchase of various tickets, electronic payment, and health care through interlocking medical devices.In particular, major credit card companies such as Europay, Visa, MasterCard, etc. The EMV (Europay-Master-Visa) standard has been enacted and promoted.

The expansion of portable electronic devices such as smartphones equipped with NFC communication modules is the biggest driver of the expansion of the NFC market. However, a metal material such as a battery case exists inside the portable electronic device, and an eddy current formed when an alternating magnetic field used for NFC communication is applied to the metal part and the anti-magnetic field resulting therein reduce the NFC communication efficiency and the recognition distance. There is a problem to lower. In order to solve this problem, high magnetic permeability magnetic materials are placed between the NFC antenna and the portable electronic device main body to prevent the magnetic sheet from concentrating the magnetic flux of the antenna to prevent magnetic field penetration into the metal surface and the formation of eddy currents. In particular, when a low loss magnetic material having a high quality factor (Q) is used, attenuation of the antenna signal can be minimized to ensure a sufficient recognition distance regardless of the presence or absence of the back metal part.

Magnetic materials that play such roles include composite magnetic sheets combined with metal powders that have been processed to show excellent performance in the MHz band and polymer binders having flexible properties, or spinel-type ferrite sintered body types. Magnetic sheets are mainly used. In addition, since the inductance induced by the antenna and the recognition distance of the antenna are proportional to each other, a study to increase the inductance of the antenna is also required.

Korean Patent Publication No. 2010-0111409 relates to a wireless identification antenna in which a radiator pattern is directly formed on a magnetic sheet, and a manufacturing method thereof. However, this uses an insulating layer having an adhesive property, and removes only the adhesive layer, the insulating layer remains, and directly attaches the insulating layer imprinted with the antenna pattern on the magnetic sheet, and a polymer material is applied to the pattern of the insulating layer. Or an antenna made of silver nano paste, etc., to reduce the spaced distance between the magnetic sheet and the antenna are separated from each other. However, since the magnetic sheet and the antenna are still separated from each other, the effect of increasing the inductance or improving the recognition distance is insignificant.

In general, currently used magnetic sheets are fixed using double-sided adhesive tape on a flexible printed circuit board (FPCB) mainly printed NFC antenna pattern. However, as miniaturization and thinning of portable electronic devices are required, the space in which the NFC antenna module can be mounted is also gradually narrowing, and in particular, the restriction on the height of the antenna is intensifying. Therefore, the current height of the NFC antenna (loop antenna pattern + FPCB) is about 100㎛ level, the magnetic sheet is also required to be manufactured to less than 100㎛ including the adhesive layer.

To this end, various attempts have been made to reduce the thickness, but at the same time reducing the thickness while improving the recognition distance is recognized as a very difficult task. Therefore, the present invention is a structural improvement through the design of the antenna and the magnetic sheet, the structure capable of increasing the number of turns while maintaining the same window induction (Window Area) prescribed by the closure of the loop in the loop-type antenna By maintaining the same number of turns or windings, it is possible to increase the magnetic flux induction area (Window Area) to secure a larger recognition distance than the conventional NFC antenna, and also to place the loop antenna inside the magnetic sheet. To reduce the height occupied by the antenna and the magnetic sheet, to provide a thin-film antenna integrated magnetic sheet for short-range wireless communication and its manufacturing method.

In order to solve the above problems, it is intended to form an antenna-integrated magnetic sheet using the magnetic material itself rather than a separate insulating layer. The present invention provides a structure in which a composite magnetic sheet is manufactured using magnetic metal powder and a binder, and a loop antenna is embedded in the composite magnetic sheet.

In the antenna buried structure, the antenna is embedded, and in the structure consisting of the magnetic sheet, the insulating layer or the adhesive layer, and the antenna, the insulator or the adhesive layer can be excluded, and the antenna is embedded in the same structure, thereby providing the antenna The width of the metal wire can be reduced and the thickness (or height) can be increased while maintaining the same cross-sectional area of the metal wire to be used. As the cross-sectional area of the antenna decreases, the resistance increases, and the amount of current induced in the antenna decreases, resulting in a shorter recognition distance. Therefore, the present invention can reduce the line width of the metal wire while maintaining the same cross-sectional area of the antenna, thereby increasing the number of turns while maintaining the same window induction area, or maintaining the same number of turns. Window area). Therefore, the inductance value induced by the antenna is increased, so that the recognition distance of the antenna can be increased.

The soft magnetic metal powder constituting the composite material magnetic sheet of the antenna integrated magnetic sheet is specially processed in consideration of the shape magnetic anisotropy at 13.56 MHz, and the magnetization biaxially oriented parallel to the sheet direction desirable. When the integrated magnetic sheet is mounted on a terminal such as a portable electronic device, it is preferable that the surface consisting of a composite material type magnetic sheet having no antenna embedded therein is mounted inside the device and the surface where the antenna is embedded facing the outside of the device.

In the case of the antenna-integrated magnetic sheet of the present invention, due to the structure in which the antenna is directly embedded in the magnetic sheet, the following effects can be obtained.

First, since the thickness can be reduced due to the absence of the adhesive layer or the insulating layer compared to the conventional method, it is possible to expect the same effect as using a thicker magnetic sheet without increasing the overall thickness.

Secondly, by taking advantage of the thickness gains from embedding the antenna, the antenna line width and height can be increased. This is a structural advantage that can be obtained the third and fourth effects below.

Third, as the line width of the antenna is reduced and the height is increased, the number of windings of the loop antenna can be increased while maintaining the same window area formed by the loop antenna. Therefore, the number of turns of the loop antenna can be increased while maintaining the cross-sectional area of the antenna as the conventional one, and the inductance of the antenna device can be increased. This increase in inductance leads to an increase in the recognition distance of the antenna.

Fourth, as the line width of the antenna is reduced and the height is increased, the area inside the loop formed by the loop antenna can be increased while maintaining the same number of turns to the loop antenna. Therefore, the area inside the loop loop can be increased while maintaining the cross-sectional area of the antenna as in the prior art, thereby increasing the inductance of the antenna device. As with the third effect, an increase in inductance results in an increase in the recognition distance of the antenna.

Fifth, magnetic materials other than air or an insulator are positioned in the gap between the antenna patterns, thereby making it easier to form a magnetic path, and using a magnetic sheet having the same volume as the existing one, a higher recognition distance can be realized.

In conclusion, in the present invention, the antenna is directly embedded in the magnetic sheet, thereby maintaining the same thickness as the existing magnetic sheet, having a higher inductance value, and facilitating the formation of magnetic fluxes, thereby increasing the recognition distance of the antenna. It can be effected.

1 is a cross-sectional view of an antenna-integrated magnetic sheet configured by completely embedding a metal wire wound a plurality of times in a loop form inside a composite magnetic material sheet.
FIG. 2 is a cross-sectional view of an antenna-integrated magnetic sheet configured by embedding only a part of a metal wire wound in a loop shape in a composite magnetic material sheet.
3 is an enlarged cross-sectional view of only one of metal wires partially embedded in the composite magnetic material sheet.
4 (a) is a plan view when a metal wire is used as an antenna on a lower portion where an adhesive layer or an insulating layer is formed on an existing magnetic sheet.
4B is a plan view of the antenna-integrated magnetic sheet when the number of turns of the metal wire is the same as that of the conventional one.
Fig. 4C is a plan view of the antenna-integrated magnetic sheet when the area formed by the closed loop of the existing metal wire is the same.
5 is an experimental result showing a change in inductance value according to the buried depth of the antenna when the number of turns is the same.
6 is an experimental result showing a change in inductance value according to the buried depth of the antenna when the magnetic flux induction area is the same.

1 illustrates an antenna-integrated magnetic sheet 100 configured by completely embedding a metal wire 300 wound a plurality of times in a loop form inside a composite magnetic material sheet 200, and the composite magnetic material sheet 200 may be a magnetic material. It consists of a metal particles and a binder, the antenna is composed of a metal wire 300 is wound a plurality of times in a loop form inside the composite magnetic material sheet 200 is completely embedded. In Fig. 1 and Fig. 2, o indicates that the direction of the antenna is directed above the ground by the winding, and x indicates that it is directed below the ground.

2 illustrates an antenna-integrated magnetic sheet 110 formed by embedding only a part of a metal wire 300 wound a plurality of times in a loop form inside the composite magnetic material sheet 200, and the composite magnetic material sheet 200 is magnetic. It consists of a metal particles and a binder, the antenna is composed of a metal wire 300 is wound a plurality of times in a loop form inside the composite magnetic material sheet 200 is completely embedded.

In the antenna buried structure, the antenna is embedded, and in the structure consisting of the magnetic sheet, the insulating layer or the adhesive layer, and the antenna, the insulator or the adhesive layer can be excluded, and the antenna is embedded in the same structure, thereby providing the antenna While maintaining the same cross-sectional area of the metal wire 300 to be used, it is possible to reduce the width of the metal wire 300 and increase the thickness (or height). As the cross-sectional area of the antenna decreases, the resistance increases, and the amount of current induced in the antenna decreases, resulting in a shorter recognition distance. Therefore, the present invention can reduce the line width of the metal wire 300 while maintaining the same cross-sectional area of the antenna, thereby increasing the number of turns while maintaining the same magnetic flux induction area (Window Area), or maintaining the same number of magnetic fluxes. It can increase the window area. Therefore, the inductance value induced by the antenna is increased, so that the recognition distance of the antenna can be increased.

At this time, in order to substantially fix the metal wire 300, the buried depth should be 10% or more based on the total thickness of the metal wire 300, and will be 100% when completely buried. The magnetic metal particles may be spherical or plate-shaped, and include at least one of iron (Fe), silicon (Si), chromium (Cr), nickel (Ni), and manganese (Mn). Can be.

In particular, when the metal wire is completely embedded in the composite magnetic material sheet, the thickness of the composite magnetic sheet and the antenna-integrated magnetic sheet coincide, and the thickness of the antenna-integrated magnetic sheet is about 0.05 mm or more for use as a portable electronic terminal device. Since the thickness of 0.3mm or less is required, the composite magnetic material sheet may also have a thickness of 0.05mm or more and 0.3mm or less, and the thickness of the metal wire used as the antenna is preferably about 0.03mm or more and 0.2mm or less. . In addition, the cross-sectional area of the metal wire is in consideration of the resistance, depending on the type of metal material, it is preferred to 0.03mm ² or more to less than 0.2mm ^2. However, this may be selected and changed according to the purpose of the user, but is not necessarily limited thereto.

The binder is chlorinated polyethylene, ethylene propylene dimethyl, silicone rubber, acrylic resin, amide resin, epoxy resin, phenol resin, polyester resin, polyethylene resin, ethylene-propylene rubber, polyvinyl butyral resin, polyurethane resin, It may be selected and used according to the purpose to include at least one or more of nitrile-butadiene-based rubber.

In addition, in order for the composite magnetic material sheet 200 to have sufficient magnetic properties, flexibility, adhesive strength, and the like, the weight ratio of the magnetic metal particles may preferably have a weight percentage of 50 to 95% based on the total weight of the composite magnetic material sheet. .

In addition, the metal wire 300 includes at least one of copper (Cu), silver (Ag), gold (Au), aluminum (Al), nickel (Ni), platinum (Pt), and palladium (Pd). Can be done.

3 is an enlarged cross-sectional view of only one of the metal wires 300 partially embedded in the composite magnetic material sheet 200. The metal wire 300 used as an antenna has a width W, a thickness H, and a depth D embedded in the composite magnetic material sheet 200. In addition, the thickness of the composite magnetic material sheet 200 is represented by S, and the total thickness of the antenna integrated magnetic sheet 110 including both the composite magnetic material sheet 200 and the metal wire 300 is represented by T. In general, in order to be used for short-range wireless communication in a portable electronic terminal device, the total thickness of the antenna-integrated magnetic sheet including both the composite magnetic material sheet 200 and the metal wire 300 may have a thickness of about 0.05 mm to 0.3 mm. Required.

The present invention is a buried structure capable of reducing W by increasing H while maintaining the same structure as the existing structure T and the cross-sectional area of the wire, W x H. As a result, the number of windings or the magnetic flux induction area is increased, resulting in an antenna It can increase the inductance and recognition distance of.

Figure 4 is a plan view comparing the antenna buried structure and the existing non-embedded structure of the present invention, Figure 4 (a) is a structure in which the metal wire on the lower portion of the adhesive layer or the insulating layer formed on the magnetic sheet in the existing structure with the antenna , 4 (b) is a plan view of the antenna-integrated magnetic sheet when 4 (a) is the same as the number of turns, and 4 (c) is an antenna-integrated magnet when the same magnetic flux induction area (Window Area) as the conventional one. Top view of the sheet. As can be seen in FIG. 4, when the distance between the metal nanowires 300 is made constant, the same number of turns increases the magnetic flux induction area (Window Area) greatly, and the magnetic flux induction area (Window Area) is the same. It can be seen that the number of turns increases greatly.

Table 1 is an experimental data for the inductance value according to the structure of the magnetic sheet and the antenna as shown in FIG. The antenna was made of copper wire, and the cross-sections were all the same at 0.06 mm ² , and the total height T was also made the same at 0.2 mm.

Existing structure

Reclamation structure (the same ticket)

Landfill structure
(Same flux induction area)
Wire cross section (mm ² )

0.06

0.06

0.06

Buried depth (mm)

0

0.1

0.1

Turns

4

4

8

Magnetic flux induction area (cm ² )

5.14

8.75

5.14

Inductance (μH)

14.73

21.5

47.7

As shown in Table 1, it can be seen that the magnetic flux induction area increases when the number of windings is the same, the inductance value increases, and when the magnetic flux induction area is the same, the number of turns increases, the inductance value increases.

Table 2 shows the experimental results for the change of inductance value according to the buried depth of the antenna when the number of turns is the same. The antenna was made of copper wire, and the cross-sections were all the same at 0.06 mm ² , and the total height T was also made the same at 0.2 mm. The buried structures 1 to 3 were changed by controlling the thickness of the composite magnetic material sheet in order to maintain the same number of turns and magnetic flux induction area.

Existing structure

Landfill Structure 1

Landfill Structure 2

Landfill Structure 3

Buried depth (mm)

0

0.05

0.1

0.15

Wire cross section (mm ² )

0.06

0.06

0.06

0.06

Turns

4

4

4

4

Magnetic flux induction area (cm ² )

5.14

8.75

8.75

8.75

Inductance (μH)

14.73

18.09

21.5

22.05

As shown in Table 2, the magnetic flux inducing area increases when the number of windings in the buried structure is the same, and the inductance value increases. In particular, when the buried structures 1, 2 and 3 have the same number of windings and the magnetic flux inducing area, the buried depth increases. As can be seen that the inductance value increases. This is because, as the thickness of the composite magnetic material sheet increases, it becomes easy to form a magnetic path as a composite magnetic material sheet exists instead of an insulating layer, an adhesive, or air between copper wire lines. These results are shown in FIG. 5.

Table 3 shows the experimental results for the change of inductance value according to the buried depth of the antenna when the window area is the same. The antenna was made of copper wire, and the cross-sections were all the same at 0.06 mm ² , and the total height T was also made the same at 0.2 mm. The buried structures 4 to 6 were changed by controlling the thickness of the composite magnetic sheet in order to keep the number of turns and the magnetic flux induction area the same.

Existing structure

Landfill Structure 1

Landfill Structure 2

Landfill Structure 3

Buried depth (mm)

0

0.05

0.075

0.1

Wire cross section (mm ² )

0.06

0.06

0.06

0.06

Turns

4

8

8

8

Magnetic flux induction area (cm ² )

5.14

5.14

5.14

5.14

Inductance (μH)

14.73

47.7

48.9

48.9

As shown in Table 3, the buried structure has an increased number of windings when the magnetic flux induction area is the same and an inductance value increases. In particular, even when the buried structures 4, 5, and 6 have the same number of turns and magnetic flux induction areas. It can be seen that as the buried depth increases, the inductance value increases. This is because as the thickness of the composite magnetic material sheet increases, it becomes easy to form a magnetic path as the composite magnetic material sheet exists in place of the insulating layer, the pressure-sensitive adhesive, and the air between the copper wires, and the results are shown in FIG. 6.

In addition, the inductance of the antenna-integrated magnetic sheet may vary depending on the type and structure of the metal wire used as the antenna and the type of metal powder and binder used in the composite magnetic material sheet, but it is generally preferable to have a value of 10 μH or more. .

The antenna integrated magnetic sheets 100 and 110 may be manufactured by the following method. First, a metal wire 300 wound up a plurality of times in a loop form and a magnetic metal powder are prepared, and an additive including the magnetic metal powder, a solid polymer binder, and a crosslinking agent is added and mixed to form a mixture. The magnetic metal powder may be in the form of a sphere or a plate. In addition, the metal wire 300 wound in the loop form a plurality of times may be manufactured by simply winding the wire or etching a flexible copper clad laminate (FCCL).

The composite magnetic material sheet 200 having a sheet shape is manufactured by pressing the mixture using a metal roller, and the composite magnetic material sheet 200 is formed on the upper portion of the metal wire 300 wound in a plurality of loops. The thermocompression-bonding can be manufactured with the antenna-integrated magnetic sheets (100, 110).

Another manufacturing method is to prepare a composite magnetic material sheet 200 from a slurry, first to prepare a metal wire 300 and magnetic metal powder wound in a plurality of times in a loop form, an additive comprising a solid polymer binder, and a crosslinking agent To prepare a liquid binder dissolved in an organic solvent. The magnetic metal powder may be in the form of a sphere or a plate.

The liquid binder and the magnetic metal powder are mixed to form a slurry, and the slurry is manufactured by using a tape casting method to prepare a sheet-shaped composite magnetic material sheet, and then a plurality of loops are formed. The composite magnetic material sheet may be stacked on the upper part of the rewound metal wire, and thermally compressed to prepare an antenna integrated magnetic sheet.

Another manufacturing method is to apply the slurry on the antenna to produce an antenna integrated magnetic sheet. That is, a liquid binder obtained by dissolving an additive including a solid polymer binder and a crosslinking agent in an organic solvent is prepared, and the liquid binder and the magnetic metal powder are mixed to form a slurry. Thereafter, the slurry may be applied to the upper portion of the metal wire wound in the loop form, and a sheet may be formed using a tape casting method, and the sheet may be thermocompressed to increase the density of the sheet. It is to manufacture an integrated magnetic sheet.

In addition, the hot pressure welding process is using a hot press, using any one of nail head bonding (wedge bonding), wedge bonding (parallel cap bonding) It may be made, but is not limited thereto.

The antenna-integrated magnetic sheet manufactured as described above is preferably mounted such that a composite magnetic sheet portion in which an antenna is not embedded in a terminal such as a portable electronic device including a mobile phone is directed toward the inside of the device, and an antenna embedded portion is directed toward the outside of the device.

A copper wire having a width of 0.4 mm and a thickness of 0.15 mm was wound four times to prepare a closed loop copper wire. On the other hand, a spherical magnetic alloy powder made of Fe-Si-Cr alloy is prepared by the atomization method, in which 10% by weight of Si and 2% by weight of Cr are added, and Ni and Mn are also added. 0.5% by weight each was added. The diameter of the approximate spherical alloy powder is in the range of 10-50 μm. However, it is also possible to purchase and use a powder having a desired component, size, and the like among commercially available metal powders.

The magnetic Fe-Si-Cr alloy powder, silicone rubber, acrylic resin, amide resin, and methacrylic acid were added and mixed in an industrial kneader to form a mixture, and the mixture was 80 ^° C. By pressing through a metal roller of, a sheet-like composite magnetic material sheet was formed, which was thermocompressed in a hot press of 200 ^° C. in order to increase the density of the sheet.

The sheet-shaped composite magnetic material sheet was placed on top of the copper wire wound four times in the loop shape, and the sheet-shaped composite magnetic material sheet was thermocompressed at about 200 ^° C. to manufacture an antenna-integrated magnetic sheet.

The total thickness of the prepared antenna-integrated magnetic sheet was 2 mm, the thickness of the embedded antenna was 0.1 mm, and the thickness of the composite magnetic sheet was 0.15 mm.

The inductance of the antenna-integrated magnetic sheet was measured at 13.56 MHz using the HP 4194A Impedanace / Gain-Phase Analyzer, and the inductance value of the antenna-integrated magnetic sheet prepared in Example was able to obtain a value of 21.5 μH.

Although the present invention has been described with reference to the accompanying drawings, it is merely one example of various embodiments including the gist of the present invention, which can be easily implemented by those skilled in the art. It is clear that the present invention is not limited to the above-described embodiment only. Accordingly, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which fall within the scope of equivalence by alteration, substitution, substitution, Range. In addition, it should be clarified that some configurations of the drawings are intended to explain the configuration more clearly and are provided in an exaggerated or reduced size than the actual configuration.

100: antenna-integrated magnetic sheet of metal wire fully embedded
110: antenna-integrated magnetic sheet of a structure in which a metal wire is partially embedded
200: composite magnetic material sheet
300: metal wire wound in a loop multiple times
W: width of metal wire
H: thickness or height of the metal wire
D: buried depth of metal wire
S: thickness of composite magnetic sheet
T: total thickness of magnetic sheet with integrated antenna
A: flux induction area

Claims (20)

delete In the antenna integrated magnetic sheet,
It consists of a composite magnetic material sheet and an antenna,
The composite magnetic material sheet includes magnetic metal particles and a binder, and the antenna is made of a metal wire having a shape wound in a loop shape a plurality of times, and the metal wire has a predetermined depth in the composite magnetic material sheet. And a first portion embedded in the second portion and a second portion protruding to the outside of the composite magnetic material sheet.
The height of the first portion of the metal wire is an antenna integrated magnetic sheet, characterized in that 10% or more and 99% or less based on the total thickness of the metal wire.
delete 3. The antenna-integrated magnetic sheet according to claim 2, wherein the magnetic metal particles are spherical or plate-shaped.
The method of claim 4, wherein the magnetic metal particles are characterized in that at least one of iron (Fe), silicon (Si), chromium (Cr), nickel (Ni), manganese (Mn). Magnetic sheet with integrated antenna. The method of claim 5, wherein the binder is chlorinated polyethylene, ethylene propylene dimethyl, silicone rubber, acrylic resin, amide resin, epoxy resin, phenol resin, polyester resin, polyethylene resin, ethylene-propylene rubber, polyvinyl butyral An antenna-integrated magnetic sheet comprising at least one of resin, polyurethane resin, and nitrile-butadiene rubber. The magnetic sheet of claim 6, wherein the magnetic metal particles have a weight percentage of 50 to 95, based on the total weight of the composite magnetic material sheet. The method of claim 7, wherein the metal wire is at least one of copper (Cu), silver (Ag), gold (Au), aluminum (Al), nickel (Ni), platinum (Pt), palladium (Pd). An antenna integrated magnetic sheet comprising a. The antenna integrated magnetic sheet according to claim 8, wherein the composite magnetic material sheet has a thickness of 0.05 mm or more and 0.3 mm or less. The antenna-integrated magnetic sheet according to claim 9, wherein the metal wire has a thickness of 0.03 mm or more and 0.2 mm or less. 11. The antenna integrated magnetic sheet according to claim 10, wherein the total thickness of the antenna integrated magnetic sheet is 0.05 mm or more and 0.3 mm or less. The cross-sectional area of the metal wire constituting the antenna according to claim 11, wherein the cross-sectional area of the metal wire is 0.03 mm ² or more and 0.3 mm ^2. An antenna-integrated magnetic sheet characterized by the following. delete In the manufacturing method of the antenna integrated magnetic sheet,
(i) preparing a metal wire of a shape wound multiple times in a loop shape,
(ii) preparing a magnetic metal powder,
(iii) preparing a liquid binder in which an additive including a solid polymer binder and a crosslinking agent is dissolved in an organic solvent,
(iv) mixing the liquid binder and the magnetic metal powder to form a slurry,
(iv) manufacturing a sheet-shaped composite magnetic material sheet by tape-casting the slurry,
(v) stacking the composite magnetic material sheet on top of the metal wire wound in a plurality of times in a loop shape, and thermally compressing it to form an antenna integrated magnetic sheet;
Method of manufacturing an antenna-integrated magnetic sheet comprising a. In the manufacturing method of the antenna integrated magnetic sheet,
(i) preparing a metal wire of a shape wound multiple times in a loop shape,
(ii) preparing a magnetic metal powder,
(iii) preparing a liquid binder in which an additive including a solid polymer binder and a crosslinking agent is dissolved in an organic solvent,
(iv) mixing the liquid binder and the magnetic metal powder to form a slurry,
(v) applying the slurry to the upper portion of the metal wire of the shape wound in the loop form a plurality of times, and manufacturing the sheet-like sheet using a tape casting method,
(vi) thermally compressing the sheet-like sheet to increase the density of the sheet to form an antenna-integrated magnetic sheet,
Method of manufacturing an antenna-integrated magnetic sheet comprising a. The method of manufacturing an antenna integrated magnetic sheet according to any one of claims 14 to 15, wherein the magnetic metal powder has a spherical shape or a plate shape. The antenna-integrated magnetic body of claim 16, wherein the magnetic metal powder comprises at least one of iron (Fe), silicon (Si), chromium (Cr), nickel (Ni), and manganese (Mn). Manufacturing method of the sheet. 18. The method of claim 17, wherein the solid polymer binder is chlorinated polyethylene, ethylene propylene dimethyl, silicone rubber, acrylic resin, amide resin, epoxy resin, phenol resin, polyester resin, polyethylene resin, ethylene-propylene rubber, poly A method for producing an antenna-integrated magnetic sheet comprising at least one of vinyl butyral resin, polyurethane resin, and nitrile-butadiene rubber. The method of claim 18, wherein the metal wire is at least one of copper (Cu), silver (Ag), gold (Au), aluminum (Al), nickel (Ni), platinum (Pt), palladium (Pd). Method of manufacturing an antenna-integrated magnetic sheet comprising a. A portable electronic terminal device comprising the antenna-integrated magnetic sheet of claim 2.

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