KR101455729B1 - Near field communication module and manufacturing method, battery package and rear cover package of wireless communication terminal comprising NFC module - Google Patents

Abstract

The present invention relates to a short-range communication antenna module, a manufacturing method thereof, and a battery package and a rear cover package of the wireless communication terminal.
An example of a short-range communication antenna module according to the present invention includes an insulating film including a first region and a second region that is an outer rim portion surrounding the periphery of the first region; A Near Field Communication (NFC) antenna disposed in a loop shape over a second area of the insulating film; And a ferrite substrate disposed on the short-range communication antenna, and the ferrite substrate may be divided into a plurality of portions on the second region of the insulating film on which the short-range communication antenna is disposed.

Description

[0001] The present invention relates to a near-field communication antenna module and a manufacturing method thereof, and a battery package and a rear cover package of a wireless communication terminal including the same,

The present invention relates to a short-range communication antenna module, a manufacturing method thereof, and a battery package and a rear cover package of the wireless communication terminal.

Near Field Communication (NFC) is a technique of transmitting data between terminals at a close distance in a non-contact manner using one band of about 13.56 MHz as one of electronic tags. In addition to billing, short-range communication is widely used in supermarkets and general shops for transporting travel information for goods information and visitors, and for access control locks.

Recently, the market of portable terminals such as tablet and smart phone is rapidly expanding. The portable terminal is in a trend to include functions such as exchange of information, settlement, ticket reservation, search, etc. using terminals (NFC). Accordingly, there is an increasing demand for an NFC antenna module used in the short distance communication method.

Such an NFC antenna is a thin film type and has a tendency toward large-sized antenna with a very thin thickness. In addition, a ferrite substrate that functions as a reflection plate is disposed so as to secure the reception ratio of the antenna and to adhere to the back surface of the NFC antenna to shield the electromagnetic wave to the circuit board.

However, such a ferrite substrate is very easy to break or crumble, resulting in a decrease in process yield and an increase in the cost of raw materials.

An object of the present invention is to provide a short-range communication antenna module, a manufacturing method thereof, and a battery package and a rear cover package of a wireless communication terminal, which can reduce manufacturing cost and increase process yield.

An example of a short-range communication antenna module according to the present invention includes an insulating film including a first region and a second region that is an outer rim portion surrounding the periphery of the first region; A Near Field Communication (NFC) antenna disposed in a loop shape over a second area of the insulating film; And a ferrite substrate disposed on the short-range communication antenna, and the ferrite substrate may be divided into a plurality of portions on the second region of the insulating film on which the short-range communication antenna is disposed.

At this time, the ferrite substrate may not be disposed on the first region of the insulating film.

In addition, an adhesive layer may be further disposed between the ferrite substrate and the short-range communication antenna.

At this time, the adhesive layer is in the form of an adhesive sheet, and the adhesive sheet may have a first region and a second region overlapping with the first region and the second region of the insulating film, respectively.

Here, the adhesive sheet includes ferrite particles, and the size of the ferrite particles may be more than 0 占 퐉 and 5 占 퐉 or less.

Further, a wireless power consortium (WPC) may be formed on the first region of the insulating film.

Here, an absorber sheet or an amorphous metal magnetic sheet for absorbing electromagnetic waves may be disposed on the first area of the adhesive sheet.

In addition, an example of the battery package according to the present invention includes the above-described short-range communication antenna module; And a battery disposed on a back surface of the short-range communication antenna module.

In addition, an example of a rear cover package of a wireless communication terminal according to the present invention includes a short distance communication antenna module; And a rear cover for a wireless communication terminal disposed on a front surface of the short-range communication antenna module.

In addition, the above-described short-range communication antenna module may be applied to a wireless communication terminal.

Here, the short-range communication antenna module may include an adhesive sheet including a first region and a second region that is an outer rim portion surrounding the periphery of the first region, the adhesive sheet including ferrite particles; And a ferrite substrate divided into a plurality of portions over the second region of the adhesive sheet. At this time, the size of the ferrite particles may be more than 0 μm and not more than 5 μm.

Further, an example of a manufacturing method of such a short-range communication antenna module includes cutting a ferrite green sheet so as to be divided into a plurality of regions; After the cutting step, heat treating the ferrite green sheet; Forming an adhesive layer on one surface of a ferrite substrate divided into a plurality of pieces by heat treating the ferrite green sheet; ? A plurality of ferrite substrates on which an adhesive layer is formed are arranged in a loop form on a second region of an insulating film including a first region and a second region that is an outer rim portion surrounding the periphery of the first region, ) On the antenna.

Here, the ferrite green sheet cut to be divided into a plurality of regions in the cutting step may be divided into a plurality of ferrite substrates by the heat treatment step.

At this time, the adhesive layer may have thermosetting or pressure-sensitive properties.

Further, the adhesive layer may be in the form of an adhesive sheet, the plurality of ferrite substrates may be divided and arranged in the outer region of the adhesive sheet, and the adhesive sheet in which the ferrite substrate is dividedly disposed may be heat- And can be adhered onto the short-range communication antenna and the insulating film.

The local communication antenna module and the manufacturing method according to the present invention and the battery package and the rear cover package of the wireless communication terminal including the same are divided and arranged on the back surface of the short distance communication antenna of the ferrite substrate, Can be increased.

FIGS. 1A and 1B are diagrams for explaining a first embodiment of a near field communication (NFC) antenna module according to the present invention.
2 is a view for explaining a second embodiment of a short-range communication antenna module according to the present invention.
3A and 3B are views for explaining a third embodiment of the short-range communication antenna module according to the present invention.
4 and 5 are views for explaining a fourth embodiment of a short-range communication antenna module according to the present invention.
6A and 6B are views for explaining an example in which the local communication antenna module according to the present invention is applied to a battery package of a wireless communication terminal.
7A and 7B are views for explaining an example in which the local communication antenna module according to the present invention is applied to a rear cover package of a wireless communication terminal.
8A to 8E are views for explaining an example of a method of manufacturing a short-range communication antenna module according to the present invention.
9A to 9C are views for explaining another example of a method for manufacturing a short-range communication antenna module according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

FIGS. 1A and 1B are diagrams for explaining a first embodiment of a near field communication (NFC) antenna module according to the present invention.

1A is a perspective view showing a state before a ferrite substrate 30 is bonded to a short-range communication antenna 20 formed on an insulating film 10 and FIG. 1B is a perspective view showing a ferrite substrate 30 (B) is a cross-sectional view taken along the line BB in Fig. 1 (a). Fig.

1A and 1B, a short range communication (NFC) antenna module according to the present invention includes an insulation film 10, a short-range communication antenna 20 disposed on the insulation film 10, a short- And a ferrite substrate 30 disposed on the ferrite substrate 30.

Here, the insulating film 10 may be formed in the form of a sheet of a nonconductive material. For example, the insulating film 10 may be formed of polyimide (PI), polyethylene terephthalate (PET), polyphenylene sulfide PPS, and Polyethylene sulfone (PES).

The thickness of the insulating film 10 may be, for example, between 10 탆 and 50 탆.

A radio wave is incident from the outside on the first surface, that is, the front surface of the insulating film 10, and the second surface, i.e., the rear surface opposite to the first surface, The antenna 20 may be disposed so that the short distance communication antenna 20 can receive radio waves that are incident on and passed through the insulating film 10.

The first surface of the insulating film 10 may include a first region S1 as an inner region and a second region S2 as an outer rim portion surrounding the periphery of the first region S1.

Here, in the second region S2 of the insulating film 10, that is, in the outer frame region of the insulating film 10, a short range communication (NFC) antenna 20 is formed as shown in Figs. 1A and 1B (a) As such, it can be deployed.

The short-range communication antenna 20 may be formed of a conductive material, for example, copper (Cu), and the arrangement may include a second region S2 in the form of a loop.

For example, the width of the short-range communication antenna 20 may be in the range of a few millimeters, and the thickness may be formed in a range of 10 mu m to 20 mu m.

As described above, the ferrite substrate 30 can be disposed on the short-range communication antenna 20 patterned in the form of a loop. That is, the ferrite substrate 30 may be disposed so as to overlap with the short-range communication antenna 20 on the first region S1 of the insulating film 10 on which the short-range communication antenna 20 is disposed.

The thickness of the ferrite substrate 30 may be in the range of 10 to 100 μm and the material of the ferrite substrate 30 may include at least one of nickel (Ni), zinc (Zn), and manganese (Mn) Specifically, nickel (Ni) -zinc (Zn) may be mixed or zinc (Zn) -manganese (Mn) may be mixed.

Such a ferrite substrate 30 is disposed on the rear surface of the short-range communication antenna 20 when viewed from the direction of the radio wave and transmits the radio waves not absorbed in the short- So as to further improve the reception capability of the short distance communication antenna 20. [

In addition, the ferrite substrate 30 may function to shield electromagnetic waves generated by the short-range communication antenna 20 from advancing to the rear side of the short-range communication antenna 20. [

An adhesive layer 40 may be disposed between the ferrite substrate 30 and the short-range communication antenna 20. The adhesive layer 40 may serve to securely bond the ferrite substrate 30 to the short-range communication antenna 20 and the insulating film 10.

The adhesive layer 40 may include at least one of an epoxy-based material and an acrylic-based material.

1A and 1B, the ferrite substrate 30 of the above-described short-range communication antenna module is mounted on the second region S2 of the insulating film 10 on which the short- They can be spaced apart from each other and divided into a plurality of spaces.

That is, the ferrite substrate 30 in the short-range communication antenna module according to the present invention is spatially separated from the second region S2 of the insulating film 10 on which the short- And the ferrite substrate 30 may not be disposed on the first region S1 of the insulating film 10 where the short-range communication antenna 20 is not disposed.

As described above, the ferrite substrate 30 is divided and disposed only on the second region S2 of the insulating film 10 on which the short-range communication antenna 20 is disposed, And the manufacturing cost can be greatly reduced.

Specifically, as shown in FIG. 1B, the ferrite substrate 30 is divided into four regions (for example, a first region, a second region, and a second region) on the second region S2 of the insulating film 10 in which the short- As shown in FIG. Such a ferrite substrate 30 has no elasticity and has a property that it is fragile due to its relatively thin area relative to its thickness.

Therefore, even if the insulating film 10 and the short-range communication antenna 20 are made large, the ferrite substrate 30 is divided and disposed on the short-range communication antenna 20 so that the ferrite substrate 30, which is relatively fragile during the manufacturing process, Can be formed more easily and efficiently on the short distance communication antenna (20).

In addition, the ferrite substrate 30 is formed by heat-treating a ferrite green sheet. Recently, the price of raw materials of the ferrite green sheet has been continuously increasing.

However, in the present invention, the fragile ferrite substrate 30 is divided and disposed only on the second region S2 of the insulating film 10 on which the short-range communication antenna 20 is disposed, By not being formed on the area S1, it is possible to greatly reduce the manufacturing cost and maximize the utilization of the ferrite green sheet in which the price of the raw material is continuously increased.

2 is a view for explaining a second embodiment of a short-range communication antenna module according to the present invention.

In the description of FIG. 2, the same portions as those described in FIGS. 1A and 1B described above are omitted, and the other portions are mainly described.

2 (a) is a perspective view of another example of a short-range communication antenna substrate in which a short-range communication antenna 20 and a wireless charging loop pattern 22 are formed on an insulating film 10 in a short- And FIG. 2B is a cross-sectional view of the short-range communication antenna module in which the ferrite substrate 30 is formed on the short-range communication antenna substrate shown in FIG. 2A.

2, the local area communication antenna substrate according to the second embodiment includes a wireless charging loop pattern 22 for wireless charging of a mobile terminal for wireless communication on a first area S1 of the insulating film 10, power consortium (WPC), and a short-range communication antenna 20 disposed in a loop shape may be disposed on the second area S2.

Here, the width of the wireless fill loop pattern 22 may be several millimeters, and the thickness may be between 60 mu m and 100 mu m. As described above, when the wireless charging loop pattern 22 is formed in the first region S1 of the insulating film 10, the thickness of the short-range communication antenna 20 is different from the thickness of the wireless charging loop pattern 22 It may be formed in the same manner.

At this time, the ferrite substrate 30 described above may be formed by being divided into a plurality of portions spaced apart from each other on the second region S2 of the insulating film 10 on which the short-range communication antenna 20 is disposed.

The adhesive layer 40 for bonding the ferrite substrate 30 and the short-range communication antenna 20 to each other may also be formed only on the second region S2 of the insulating film 10. [ However, as described above, when the wireless charging loop pattern 22 is formed on the first region S1 of the insulating film 10, the means for intercepting electromagnetic waves induced by the wireless charging loop pattern 22 is wireless The filling loop pattern 22 may be further added over the first region S1 of the insulating film 10 on which the filling loop pattern 22 is formed. This will be described in more detail in Fig.

3A and 3B are views for explaining a third embodiment of the short-range communication antenna module according to the present invention.

In the description of FIGS. 3A and 3B, the same parts as those described in FIG. 2 are not described, and the other parts are mainly described.

3A is a perspective view showing a state before the ferrite substrate 30 is bonded to the short-range communication antenna 20 formed on the insulating film 10 in the short-range communication antenna module according to the third embodiment, and FIG. 3B Sectional view of the ferrite substrate 30 bonded to the short-range communication antenna 20 formed on the insulating film 10;

In the short distance communication antenna module according to the third embodiment, a wireless power consortium (WPC) 22 for wireless charging of a mobile terminal for wireless communication is disposed on the first region S1 of the insulating film 10 And a short-range communication antenna 20 disposed in a loop shape may be disposed on the second area S2.

Here, the thickness of the wireless charging loop pattern 22 may be the same as the thickness of the short distance communication antenna 20, but it is also possible that the thickness of the wireless charging loop pattern 22 is larger than the thickness of the short distance communication antenna 20 Do.

3A and 3B, in the short-range communication antenna module according to the third embodiment, the adhesive layer is in the form of an adhesive sheet 40S having a first region S1 and a second region S2, May be disposed on the first region (S1) and the second region (S2) of the insulating film (10).

The first region S1 of the adhesive sheet 40S and the first region S1 of the insulating film 10 are overlapped with each other and the second region S2 of the adhesive sheet 40S and the insulating film 10 overlap each other. The second regions S2 of the first and second regions may overlap each other.

Such an adhesive sheet 40S may be formed by including ferrite particles FP having a size of more than 0 μm and 5 μm or less in the base layer BM containing at least one of an epoxy-based material and an acrylic-based material .

Here, the shape of the ferrite particles FP may be circular or polygonal, and may be a non-uniform shape having a non-uniform shape. In addition, the material of the ferrite particles FP may include at least one of nickel (Ni), zinc (Zn), and manganese (Mn).

As described above, the adhesive sheet 40S including the ferrite particles FP can be formed of the thermosetting adhesive sheet 40S which hardens as the temperature increases or the pressure-sensitive adhesive sheet 40S which hardens as the pressure increases .

3A, the ferrite substrate 30 may be first placed on the adhesive sheet 40S, and then heat-treated or pressurized to be adhered on the insulating film 10 on which the short-range communication antenna 20 is formed have.

The ferrite substrate 30 described above is disposed on the back surface of the short-range communication antenna 20, which is disposed on the second area S2 of the insulating film 10 and is disposed on the second area S2 of the adhesive sheet 40S. So that the electromagnetic wave generated by the short-range communication antenna 20 can be cut off and the radio wave can be reflected.

At this time, the spaced space between the plurality of ferrite substrates 30 can be filled with the ferrite particles FP due to the adhesive sheet 40S including the ferrite particles FP, ) Of the ferrite substrate 30 are continuous and the propagation of the radio wave to the spaced spaces between the plurality of ferrite substrates 30 is minimized, so that the radio wave reflection function and the electromagnetic wave shielding function of the ferrite substrate 30 can be assisted.

Thus, the communication quality of the short-range communication antenna 20 can be further improved.

4 and 5 are views for explaining a fourth embodiment of the short-range communication antenna module according to the present invention.

Fig. 4A is a plan view of another example of the adhesive sheet 40S including the ferrite particles FP, Fig. 5B is a side view, Fig. 5 is a cross-sectional view of the adhesive sheet 40S according to Fig. And is attached to the antenna 20. Fig.

In the description of FIGS. 4 and 5, the same portions as those described in FIGS. 3A and 3B described above are omitted, and the other portions are mainly described.

As shown in FIG. 5, the short-range communication antenna module according to the fourth embodiment of the present invention includes, on the first region S1 of the insulating film 10, A wireless power consortium (WPC) 22 may be disposed, and a short-range communication antenna 20 disposed in a loop shape may be disposed on the second area S2.

4 (a) and 4 (b), on the second region S2 of the adhesive sheet 40S including the ferrite particles FP, a plurality of ferrite substrates 30 And one of absorber sheets or an amorphous metal magnetic sheet for absorbing electromagnetic waves may be disposed on the first area S1 of the adhesive sheet 40S. have.

Here, the absorber sheet or the amorphous magnetic sheet may include a metal conductive material to absorb the electromagnetic waves generated by the wireless charging loop pattern 22. [

Hereinafter, the short-range communication antenna module has been described. Hereinafter, an example in which the short-range communication antenna module is used in the wireless communication terminal 100 will be described.

6A and 6B are views for explaining an example in which the local communication antenna module according to the present invention is applied to a battery 151 package of a wireless communication terminal.

6A is a schematic view of a battery package 150 mounted on a rear surface of a wireless communication terminal 100 and a wireless communication terminal 100. FIG 6B illustrates a side view of the battery package 150 in more detail Respectively.

As shown in FIG. 6A, when the wireless communication terminal 100 performs short-distance communication in the direction of the arrow with the outside, short-range communication can be performed through the short-range communication antenna module mounted on the rear surface of the battery package 150 have.

At this time, as shown in FIG. 6B, the battery package 150 of the wireless communication terminal 100 according to the present invention is disposed on the back surface of the short-range communication antenna module and the short-range communication antenna module, The battery 151 may be a battery.

Here, the short-range communication antenna module is shown as being applied to the example described with reference to FIG. 5, but the embodiments described with reference to FIGS. 1A to 3B may be similarly applied.

More specifically, in the battery package 150, the double-sided adhesive layer 152 is bonded to the front surface of the battery 151 on which the radio wave is incident, and the double-sided adhesive layer 152 is bonded The ferrite substrate 30 described with reference to Figs. 1A and 1B and Fig. 4 is disposed between the adhesive sheet 40S and the double-sided adhesive layer 152 in a second area (the outer edge of the adhesive sheet 40S) S2 and the absorber sheet 32 (or the amorphous metal magnetic substance sheet) can be disposed in the first region S1, which is the inner portion of the adhesive sheet 40S.

The wireless charging loop pattern 22 is disposed in the first region S1 between the adhesive sheet 40S and the insulating film 10, And the short-range communication antenna 20 may be disposed in the second area S2.

The radio wave transmitted to the battery package 150 can be received by the short distance communication antenna 20 through the insulating film 10 and the radio wave for performing the charging of the battery 151 can be received by the insulating film 10, And may be received in the wireless charging loop pattern 22.

In addition, the ferrite substrate 30 and the absorber sheet 32 (or the amorphous metal magnetic substance sheet) disposed on the back surface of the short-range communication antenna 20 and the wireless fill loop pattern 22 may shield electromagnetic waves generated upon reception of radio waves Can be reflected.

The short-range communication antenna module according to the present invention is applicable to the rear cover 171 of the wireless communication terminal 100 as well.

7A and 7B are views for explaining an example in which the local communication antenna module according to the present invention is applied to a rear cover package of a wireless communication terminal.

7A is a schematic view illustrating a rear cover package 170 fastened to the rear side of the wireless communication terminal 100 and the wireless communication terminal 100 and FIG. Fig.

As shown in FIG. 7A, the short-range communication antenna module in the rear cover package 170 may be positioned on the inner surface opposite to the outer surface of the rear cover 171 through which the radio wave is incident.

Accordingly, when the wireless communication terminal 100 performs short-range communication in the direction of the arrow with the outside, short-range communication can be performed through the short-range communication antenna module mounted on the inner surface of the rear cover package 170 described above.

As shown in FIG. 7B, the rear cover package 170 of the wireless communication terminal 100 according to the present invention includes a short-range communication antenna module for receiving a radio wave in the direction of the arrow, And a rear cover 171 for the wireless communication terminal 100 to be disposed.

The double-sided adhesive layer 173 is disposed immediately above the rear cover 171 and the short-distance communication antenna 20 and the wireless charging loop pattern 22 are formed on the insulating film 10, the insulating film 10, And the ferrite substrate 30 and the absorber sheet 32 (or the ferrite substrate 30) are placed on the adhesive sheet 40S including the ferrite particles FP on the short-range communication antenna 20 and the wireless fill loop pattern 22, Amorphous metal magnetic substance sheet).

On the ferrite substrate 30 and the absorber sheet 32, a protective sheet 174 for protecting the short-distance communication antenna module from external exposure can be located.

Hereinabove, various examples of the short-range communication antenna module have been described, but a method of manufacturing the short-range communication antenna module according to the present invention will be described below.

8A to 8E are views for explaining an example of a method of manufacturing a short-range communication antenna module according to the present invention.

First, as shown in FIG. 8A, a ferrite green sheet (FGS) is prepared. Such a ferrite green sheet (FGS) can be produced by adding PVB, an acrylic binder, a plasticizer, a solvent, etc. to a ferrite powder through a ball mill or a coma roll process.

Such a ferrite green sheet (FGS) has elasticity like rubber and is advantageous for cutting.

Thereafter, using a cutting equipment, the ferrite green sheet FGS may be completely cut so as to be divided into a plurality of regions, or the ferrite green sheet FGS may be half-cut so that the FGS is cut completely to about half without being completely cut. Accordingly, as shown in FIG. 8B, a ferrite green sheet (ND-FGS) divided or divided into a plurality of regions can be prepared.

Next, the ferrite green sheet (ND-FGS) cut to be divided into a plurality of regions at the cutting step can be heat-treated at a high temperature. At this time, the ferrite green sheet (ND-FGS) having elasticity can be shrunk uniformly in thickness and area while the physical state is changed by the ferrite substrate 30 which is sintered while being subjected to the heat treatment step and is hard and brittle.

Accordingly, the half-cut ferrite green sheet (ND-FGS) through the heat treatment step can be divided into a plurality of ferrite substrates 30 as shown in FIG. 8C.

Thereafter, as shown in Fig. 8D, the adhesive layer 40 can be attached to one surface of the ferrite substrate 30 divided into a plurality of pieces.

8E, a plurality of ferrite substrates 30 on which the adhesive layer 40 is formed are placed on a second area S2 of the insulating film 10 in the form of a Near Field Communication (NFC) ) Antenna 20 to complete the short-range communication antenna module.

Here, the reason why the ferrite green sheet FGS is first cut and heat-treated is that the ferrite green sheet FGS is not broken even when cut, but the ferrite substrate 30, in which the ferrite green sheet FGS is heat- The ferrite substrate 30 is easily broken at the time of cutting, and the process yield may be lowered.

Therefore, in view of the above, the present invention is characterized in that the ferrite green sheet (FGS) is first cut and heat treated to form a plurality of divided ferrite substrates 30, The area of the ferrite substrate 30 is relatively small, so that the ferrite substrate 30 can have a simple rectangular shape that is easy to adhere.

Accordingly, it is possible to prevent the formation of the ferrite substrate 30 in the unnecessary space, thereby reducing the manufacturing cost and improving the process yield.

8A to 8E, the adhesive layer 40 is attached to one surface of a plurality of divided ferrite substrates 30. However, the adhesive layer 40 may be formed in the form of an adhesive sheet 40S .

This will be described in more detail as follows.

9A to 9C are views for explaining another example of a method for manufacturing a short-range communication antenna module according to the present invention.

9A, a plurality of ferrite substrates 30 are bonded to the outer periphery of the adhesive sheet 40S, which is the outer rim portion of the adhesive sheet 40S, after the ferrite green sheet FGS is subjected to heat treatment to produce a plurality of divided ferrite substrates 30. [ 2 region S2 and can be disposed apart from each other.

3A, the adhesive sheet 40S may include ferrite particles FP in a base layer BM including at least one of an epoxy-based material and an acrylic-based material.

In addition, such an adhesive sheet 40S may have a thermosetting property or a pressure-reducing property. That is, when the adhesive sheet 40S is subjected to heat or pressure, or when heat and pressure are simultaneously applied, the adhesive sheet 40S may have a property of being cured.

9A and 9B, the adhesive sheet 40S in which the ferrite substrate 30 is divided and disposed is disposed in the vicinity of the communication antenna 20 and the wireless charging loop pattern 22 Heat and pressure may be applied in a state of being placed on the insulating film 10 so as to be adhered onto the short-range communication antenna 20 and the insulating film 10. [

At this time, when heat and pressure are applied together, the distance between the ferrite substrate 30 and the short-range communication antenna 20 is further reduced, and the efficiency of the ferrite substrate 30 can be further increased.

Although not shown in Figs. 9A to 9C, even when an absorber sheet or an amorphous metal magnetic sheet for absorbing electromagnetic waves is disposed on the first area S1 of the adhesive sheet 40S, The distance between the loop pattern 22 and the absorber sheet or the amorphous metal magnetic sheet can be further reduced so that the efficiency of the absorber sheet or the amorphous metal magnetic sheet can be further increased.

Thus, a short-range communication antenna module as shown in FIG. 9C can be completed.

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, Of the right.

Claims (18)

An insulating film including a first region and a second region that is an outer rim portion surrounding the periphery of the first region;
A near field communication (NFC) antenna disposed in a loop shape over the second area of the insulating film;
A ferrite substrate disposed on the short-range communication antenna; And
And an adhesive layer disposed between the ferrite substrate and the short-range communication antenna,
A wireless power consortium (WPC) is formed on the first region of the insulating film,
Wherein the adhesive layer is in the form of an adhesive sheet and the adhesive sheet has a first region and a second region overlapping with the first region and the second region of the insulating film respectively and the adhesive sheet comprises ferrite particles,
Wherein the ferrite substrate is divided into a plurality of portions on a second region of the insulating film on which the short-range communication antenna is disposed, and is not disposed on the first region of the insulating film. delete delete delete delete The method according to claim 1,
Wherein the size of the ferrite particles is greater than 0 占 퐉 and 5 占 퐉 or less. delete The method according to claim 1,
And an absorber sheet or an amorphous metal magnetic sheet for absorbing electromagnetic waves is disposed on the first area of the adhesive sheet. The short-range communication antenna module according to any one of claims 1, 6, and 8, wherein a radio wave is incident on a front surface;
A battery disposed on a back surface of the short-range communication antenna module; And
And a rear cover for a wireless communication terminal disposed on a front surface of the short-range communication antenna module. delete delete delete delete Cutting the ferrite green sheet so as to be divided into a plurality of regions;
After the cutting step, heat treating the ferrite green sheet;
Forming an adhesive layer on one surface of the ferrite substrate divided into a plurality of pieces by heat treating the ferrite green sheet; ?
Wherein the plurality of ferrite substrates on which the adhesive layer is formed are disposed in a loop form on the second region of the insulating film including a first region and a second region that is an outer rim portion surrounding the first region, Field Communication, NFC) antennas. 15. The method of claim 14,
Wherein the ferrite green sheet cut to be divided into a plurality of regions in the cutting step is divided into a plurality of ferrite substrates by the heat treatment step. 15. The method of claim 14,
Wherein the adhesive layer has a thermosetting property or a pressure-reducing property. 15. The method of claim 14,
Wherein the adhesive layer is in the form of an adhesive sheet, and the plurality of ferrite substrates are divided and arranged in an outer area of the adhesive sheet. 18. The method of claim 17,
Wherein the adhesive sheet in which the ferrite substrate is divided is heat treated or pressed in a state of being placed on the insulating film on which the short-range communication antenna is disposed, and is adhered on the short-range communication antenna and the insulating film.

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