KR102055802B1 - Wireless communication and charge substrate and wireless communication and charge device - Google Patents

Abstract

The present invention relates to a wireless charging and communication substrate and a wireless charging and communication device, the wireless charging and communication substrate according to an embodiment of the present invention comprises a soft magnetic layer; A polymer material layer disposed on one surface and the other surface of the soft magnetic layer and extending from an exposed portion of the soft magnetic layer; And a coil pattern disposed on the polymer material layer.

Description

WIRELESS COMMUNICATION AND CHARGE SUBSTRATE AND WIRELESS COMMUNICATION AND CHARGE DEVICE

Embodiments of the present invention relate to wireless charging and communication substrates and wireless charging and communication devices.

Near Field Communication (NFC) is a wireless card (RFID) technology that uses a 13.56 MHz frequency band, and is a smart card-type contactless communication technology.Wireless Power Conversion (WPC) is a wireless charging technology that provides magnetic coupling without close contact at short distances. Non-contact charging technology to charge the battery.

NFC is a next-generation near field communication technology that enables wireless communication between electronic devices at low power at short distances and is relatively high in security and low cost because of a short communication distance. It has a large space and a wide range of applicable services, and WPC can be used to charge a battery in various fields because the battery can be charged through magnetic coupling without a separate electrical contact.

Antennas in NFC and WPC systems include coils with a constant area to provide the energy needed for the operation of the microchip from the reader. A magnetic field is formed by AC power energy generated in the primary coil, current is induced through the coil of the antenna, and voltage is generated by the inductance of the antenna. The voltage thus generated is used as power for data transmission or for charging the battery.

Recently, as the smart terminals are widely used, the necessity of a device providing both NFC and WPC is increasing. Accordingly, a demand for a device having high charging efficiency and a long recognition distance in data communication is increasing.

The present invention has been made in view of the above-described problem, and is intended to enable wireless power transmission (WPC) and near field communication (Near Field Communication).

In addition, the present invention by minimizing the portion of the soft magnetic layer is exposed to the atmosphere, to minimize the inflow of foreign matter from the outside, according to an embodiment of the present invention is arranged so that the soft magnetic layer is surrounded by a predetermined interval from the lead frame, Even when arranging the frame, it is intended to solve the problem that the transmission efficiency during charging or the recognition distance during data communication is reduced.

In addition, the present invention is to adjust or improve the transmission efficiency during charging through the addition of a soft magnetic layer, and to adjust the recognition distance during data communication.

Wireless charging and short-range wireless communication substrate according to an embodiment of the present invention is a first polymer material layer; A soft magnetic layer disposed on the first polymer material layer; A second polymer material layer disposed on the soft magnetic layer; And a coil part disposed on the second polymer material layer, wherein the soft magnetic layer includes a first soft magnetic layer and a second soft magnetic layer disposed to surround side surfaces of the first soft magnetic layer. The unit includes a coil pattern for wireless charging including a plurality of patterns and a plurality of patterns, and includes a coil pattern for short-range wireless communication arranged to surround a side surface of the coil pattern for wireless charging, wherein the first soft magnetic layer and the The second soft magnetic layer includes Fe, the first polymer material layer, the soft magnetic layer, and the second polymer material layer each include a through hole, the diameter of the through hole of the soft magnetic layer and the second polymer material layer. The through holes have different diameters from each other, and the through holes of the first polymer material layer, the through holes of the soft magnetic layer, and the through holes of the second polymer material layer each have at least a portion of the through hole overlapping region. The through hole overlapping area is formed outside the outermost pattern of the coil pattern for wireless charging.

The diameter of the through hole of the soft magnetic layer may be larger than the diameter of the through hole of the second polymer material layer.

The second polymer material layer may include an extension that extends further than the side of the soft magnetic layer.

The first polymer material layer includes an extension extending further than a side of the soft magnetic layer, wherein the length (l) of the extension of at least one of the first polymer material layer and the second polymer material layer and the thickness of the soft magnetic layer (h) may have a relationship of the following equation.

 [Equation]

l = A X h (A is a constant from 0.6 to 10)

The extension of the first polymer material layer and the extension of the second polymer material layer may be connected to each other.

An adhesive layer may be further disposed between the second polymer material layer and the coil part.

The coil pattern for wireless charging may be disposed on the first soft magnetic layer, and the coil pattern for short-range wireless communication may be disposed on the second soft magnetic layer.

It may further include a lead frame connected to the coil unit.

The soft magnetic layer may further include at least one of Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y, and Cd. Can be.

Any one of the first polymer material layer and the second polymer material layer may include at least one of polyethylene, polyacryl, polyimide, polyamide, and polyurethane.

The through hole overlapping region may be formed between the outermost pattern of the coil pattern for wireless charging and the outermost pattern of the coil pattern for short range wireless communication.

An adhesive layer may be further included between the soft magnetic layer and the second polymer material layer.

The adhesive layer may include a through hole, and at least a portion of the through hole of the adhesive layer may overlap the through hole overlapping area.

The through hole overlapping region may be formed in the first soft magnetic layer.

The through hole of the soft magnetic layer may be a hole for aligning at the time of manufacture.

A mobile terminal according to an embodiment of the present invention includes a housing; And a substrate for wireless charging and short-range wireless communication disposed in the housing, wherein the substrate for wireless charging and short-range wireless communication comprises: a first polymer material layer; A soft magnetic layer disposed on the first polymer material layer; A second polymer material layer disposed on the soft magnetic layer; And a coil part disposed on the second polymer material layer, wherein the soft magnetic layer includes a first soft magnetic layer and a second soft magnetic layer disposed to surround side surfaces of the first soft magnetic layer. The unit includes a coil pattern for wireless charging including a plurality of patterns and a plurality of patterns, and includes a coil pattern for short-range wireless communication arranged to surround a side surface of the coil pattern for wireless charging, wherein the first soft magnetic layer and the The second soft magnetic layer includes Fe, the first polymer material layer, the soft magnetic layer, and the second polymer material layer each include a through hole, the diameter of the through hole of the soft magnetic layer and the second polymer material layer. The through holes have different diameters from each other, and the through holes of the first polymer material layer, the through holes of the soft magnetic layer, and the through holes of the second polymer material layer each have at least a portion of the through hole overlapping region. The through hole overlapping area is formed between the outermost pattern of the coil pattern for wireless charging and the outermost pattern of the coil pattern for short range wireless communication.

According to an embodiment of the present invention, wireless power transmission (WPC) and near field communication (Near Field Communication, NFC) are possible.

In addition, according to an embodiment of the present invention by minimizing the portion of the soft magnetic layer exposed to the atmosphere, to minimize the inflow of foreign matter from the outside, according to an embodiment of the present invention the soft magnetic layer is surrounded by a predetermined interval from the lead frame In this case, even when the lead frame is arranged, the transmission efficiency during charging or the recognition distance during data communication may be reduced.

In addition, according to another embodiment of the present invention, through the addition of the soft magnetic layer, it is possible to adjust or improve the transmission efficiency during charging and to adjust the recognition distance during data communication.

1 is a cross-sectional view of a wireless charging and communication device according to an embodiment of the present invention.
2 is a cross-sectional view of a wireless charging and communication board according to an embodiment of the present invention.
3 is a cross-sectional view of a wireless charging and communication board according to another embodiment of the present invention.
4 and 5 are cross-sectional views of a wireless charging and communication board according to another embodiment of the present invention.
6 is a top view illustrating a coil pattern according to an embodiment of the present invention.
7 is a top view illustrating a soft magnetic layer according to an embodiment of the present invention.
8 is a top view illustrating a polymer material layer according to an embodiment of the present invention.
9 and 10 are cross-sectional views of a wireless charging and communication board according to another embodiment of the present invention.
11 to 13 are diagrams for describing transmission efficiency and recognition distance according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. However, in describing the embodiments, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted. In addition, the size of each component in the drawings may be exaggerated for description, it does not mean the size that is actually applied.

1 is a cross-sectional view of a wireless charging and communication device according to an embodiment of the present invention.

A wireless charging and communication device according to an embodiment of the present invention will be described with reference to FIG. 1.

The wireless charging and communication device according to an embodiment of the present invention may be included in wireless power conversion (WPC) and near field communication (NFC).

As shown in FIG. 1, the wireless charging and communication device according to an embodiment of the present invention may configure the receiving device 100.

The receiving device 100 and the transmitting device 500 may perform wireless power conversion (WPC) and near field communication (Near Field Communication, NFC).

The receiving device 100 includes receiving coil patterns 120 and 130, the first receiving coil pattern 120 is a coil pattern for wireless power transmission and reception (WPC), and the second receiving coil pattern 130 is a short range wireless communication. Coil pattern for communication (NFC).

In addition, the transmission device 500 includes transmission coil patterns 520 and 530, and the first transmission coil pattern 520 is a coil pattern for wireless power transmission (WPC), and the second transmission coil pattern 530 is Coil pattern for near field communication (NFC).

The first transmitting coil pattern 520 is connected to a power source (not shown), and the first receiving coil pattern 120 is connected to a circuit unit (not shown).

The power source may be an AC power source that provides AC power of a predetermined frequency, and an AC current flows in the first transmission coil pattern 520 by power supplied from a power source (not shown).

When an alternating current flows through the first transmitting coil pattern 520, an alternating current is also induced in the first receiving coil pattern 120 which is physically spaced by electromagnetic induction.

The current induced in the receiving coil pattern 120 is transferred to a separate circuit unit (not shown) and then rectified.

On the other hand, the transmission device 500 according to an embodiment of the present invention may be composed of a transmission pad (pad), the reception device 100 is a portable terminal, wireless / home appliances, home / personal electronic products, transportation is applied A mobile terminal, a home / personal electronic product, a transportation means, or the like, which is configured as a partial configuration of a means, or to which a wireless power transmission / reception technology is applied, includes only a wireless power receiver, or alternatively, a wireless power transmitter and a wireless power receiver both It can be configured to include.

That is, the transmitting device 500 may serve as a reader, and the receiving device 100 may also serve as a tag.

The receiving device 100 includes a housing 400 accommodating a wireless charging and communication board and the wireless charging and communication board, and the housing 400 transmits heat generated from the coil patterns 120 and 130 to the outside. It can dissipate heat.

On the other hand, the wireless charging and communication substrate is disposed on the soft magnetic layer (220, 230), one surface and the other surface of the soft magnetic layer (220, 230), the polymer material layer extending than the exposed portion of the soft magnetic layer (220, 230) 310 and 312, and coil patterns 120 and 130 disposed on the polymer material layers 310 and 312, and processing holes 311 penetrating the wireless charging and communication substrate are formed to be formed during manufacturing. Can be used to align.

In addition, the polymer material layer 310 is the first polymer material layer 310 disposed on one surface of the soft magnetic layer (220, 230) and the second polymer material layer disposed on the other surface of the soft magnetic layer (220, 230) 312.

In this case, the polymer material layers 310 and 312 may be formed of a black film, and the polymer material layers 310 and 312 are attached to the soft magnetic layers 220 and 230 by an adhesive layer 315. The polymer material layers 310 and 312 may include any one material of polyethylene, polyacryl, polyimide, polyamide, and polyurethane.

On the other hand, the soft magnetic layers 220 and 230 are second soft magnetic layers arranged to surround the first soft magnetic layer 220 on the same plane on which the first soft magnetic layer 220 and the first soft magnetic layer 220 are disposed. 230 may be included.

In addition, the coil patterns 120 and 130 may be disposed on a region corresponding to the first soft magnetic layer 220 on the second polymer material layer 312 and the second polymer material layer ( The second coil pattern 130 may be disposed on a region corresponding to the second soft magnetic layer 230 on the 312.

The transmission device 500 includes a soft magnetic layer 550, a transmission coil pattern 520 and 530 attached to the soft magnetic layer 550 by an adhesive layer 535, and a housing 600.

Therefore, according to an embodiment of the present invention, a wireless power transmission / reception (WPC) including a first soft magnetic layer 220 and a first coil pattern 120 is possible, and a second soft magnetic layer 230 and a second coil. The near field communication (NFC) including the pattern 130 includes all of the configurations, and may provide both the wireless power transmission and reception (WPC) and the near field communication (NFC).

Meanwhile, in another embodiment, the first transmission coil pattern 520 is configured as a coil pattern for near field communication (NFC), and the second transmission coil pattern 530 is a coil pattern for wireless power transmission / reception (WPC). It may be configured as.

2 is a cross-sectional view of a wireless charging and communication board according to an embodiment of the present invention.

As shown in FIG. 2, the wireless charging and communication substrate according to the embodiment of the present invention is disposed on the soft magnetic layers 220 and 230, one surface and the other surface of the soft magnetic layers 220 and 230, and the soft magnetic layer ( The polymer material layers 310 and 312 extending from the exposed portions of the 220 and 230, and the coil patterns 120 and 130 disposed on the polymer material layers 310 and 312.

In addition, the polymer material layer 310 is composed of a first polymer material layer 310 and a second polymer material layer 312, and the soft magnetic layers 220 and 230 are the first soft magnetic layer 220 and the second. The soft magnetic layer 230 is formed, and the coil patterns 120 and 130 are formed of the first coil pattern 120 and the second coil pattern 130.

In addition, the extended length l of the first polymer material layer 310 or the second polymer material layer 312 and the thickness h of the soft magnetic layers 220 and 230 may have a relationship of Equation 1 below. Can be formed.

[Equation 1]

l = A X h

In this case, l is the extended length of the first polymer material layer 310 or the second polymer material layer 312, h is the thickness of the soft magnetic layer (220, 230), A is a constant of 0.6 to 10, When the A value is less than 0.6, the polymer material layers 310 and 312 may not be sufficient to surround the soft magnetic layers 220 and 230, and moisture may penetrate therein. When the A value exceeds 10, the polymer Since the material layers 310 and 312 are excessively extended to be easily bent from an external impact and easily damaged, or additional storage parts must be added, the thickness may increase.

In addition, the first soft magnetic layer 220 and the second soft magnetic layer 230 may be made of different materials, for example, the first soft magnetic layer 220 may be composed of an amorphous ribbon, the second soft magnetic layer The 230 may be made of any one material of composite, ferrite, Ni-Zn, and Mn-Zn.

When the first soft magnetic layer 220 is formed of an amorphous ribbon, high permeability can be realized at an operating frequency of 100 to 200 kHZ, and the second soft magnetic layer 230 is made of composite, ferrite, and Ni-. If the material is made of any one of Zn and Mn-Zn, the loss of data communication can be reduced.

When the soft magnetic layer 120 is made of a ferrite material, the soft magnetic layer 120 may be implemented in various forms such as pellets, plates, ribbons, foils, films, and the like. It may comprise at least any one of Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd. .

The coil patterns 120 and 130 may be formed on the first coil pattern 120 and the polymer material layer 310 in the region corresponding to the first soft magnetic layer 220 on the polymer material layer 310. The second coil pattern 130 may be disposed in an area corresponding to the second soft magnetic layer 230.

In this case, the coil patterns 120 and 130 may be configured to be bonded to the polymer material layer 310 by the adhesive layer 135 as shown in FIG. 2.

3 is a cross-sectional view of a wireless charging and communication board according to another embodiment of the present invention.

As shown in FIG. 3, the wireless charging and communication board according to another embodiment of the present invention is disposed on one side and the other side of the soft magnetic layers 220 and 230, the soft magnetic layers 220 and 230, and the soft magnetic layer. The polymer material layers 310 and 312 extending from the exposed portions of the 220 and 230, and the coil patterns 120 and 130 disposed on the polymer material layers 310 and 312.

However, the embodiment of FIG. 3 further includes a polymer material connection end 313 connecting the first polymer material layer 310 and the second polymer material layer 312 and surrounding the exposed portion of the soft magnetic layer 220. It is composed. In the present specification, the polymer material connecting end 313 may be mixed with an extension part, and the first extension part extends from the first polymer material layer 310, and the second extension part extends from the second polymer material layer 312. Can be.

Accordingly, in the embodiment of FIG. 3, the exposed part is an end exposed by the processing hole 311, and moisture is penetrated from the outside by the polymer material connection end 313 surrounding the exposed part of the soft magnetic layer 220 as described above. Can be blocked.

4 and 5 are cross-sectional views of a wireless charging and communication board according to another embodiment of the present invention.

4 and 5, the polymer material layers 310 and 312 may be soft, without the adhesive layer 315 configured to bond the polymer material layers 310 and 312 to the soft magnetic layers 220 and 230. It is directly formed on the magnetic layers 220 and 230.

In this case, the polymer material layers 310 and 312 may be directly formed on the soft magnetic layers 220 and 230 through thermocompression bonding.

When the polymer material layers 310 and 312 are directly formed on the soft magnetic layers 220 and 230, as in the embodiments of FIGS. 4 and 5, the adhesive layer does not need to be used, which simplifies the process and reduces manufacturing costs. Wireless charging and communication substrates can be made.

On the other hand, the embodiment of Figures 2 to 6 has been described as an example of the cross section of the processing hole on the wireless charging and communication board, the exposed portion of the end for coupling the lead frame may also be configured in the same way.

FIG. 6 is a top view illustrating a coil pattern according to an embodiment of the present invention, and in more detail, illustrates a wireless charging and communication board included in a receiving device according to an embodiment of the present invention.

7 is a top view showing a soft magnetic layer according to an embodiment of the present invention, Figure 8 is a top view showing a polymer material layer according to an embodiment of the present invention.

The coil patterns 120 and 130 are configured to be adhered to the polymer material layer 310 by the adhesive layer 135 as shown in FIG. 2 or disposed on a separate substrate 110 as shown in FIG. 6. Can be.

As illustrated in FIG. 6, alignment marks 115 and 116 may be formed on the substrate 110 to align the alignment during the manufacture of the wireless charging and communication substrate.

In addition, the wireless charging and communication board further includes a lead frame 140 connected to the coil patterns 120 and 130, as shown in FIGS. 7 and 8, and the second soft magnetic layer 230 is formed by the lead frame ( And may be disposed to surround 140.

In more detail, the second soft magnetic layer 230 may be arranged to surround the lead frame 140 at regular intervals of 1 mm to 3 mm, as shown in FIG. 4, and thus, the second soft magnetic layer 230. ) Is arranged so as to surround the lead frame 140 at regular intervals, there is no problem that the transmission efficiency during charging or the recognition distance during data communication is reduced even when the lead frame 140 is disposed.

In addition, the exposed portion of the end portion for connecting the lead frame 140 further includes a polymer material layer (310, 312) extending from the soft magnetic layer (220, 230), as shown in FIG. As shown, it may further include a polymer material connection end 313 surrounding the end of the polymer material layer (310, 312).

The polymer material layers 310 and 312 of FIG. 8 are disposed on one surface and the other surface of the first and second soft magnetic layers 220 and 230, and the polymer material layers 310 and 312 are formed by the adhesive layer 315. The soft magnetic layers 220 and 230 may be bonded to each other.

In addition, processing holes 311 may be formed in the polymer material layers 310 and 312 and the soft magnetic layer 220.

The processing hole 311 may align with the alignment marks 115 and 116 of FIG. 6 during wireless charging and manufacturing of the communication board.

9 and 10 are cross-sectional views of a wireless charging and communication board according to another embodiment of the present invention.

9 and 10 may be configured in such a manner that the soft magnetic layers 220 and 230 are attached to one surface and the other surface of the adhesive layer 223, respectively.

9 and 10, a plurality of soft magnetic layers 220 and 230 may be added to adjust or improve transmission efficiency during charging or to adjust a recognition distance during data communication.

11 to 13 are diagrams for describing transmission efficiency and recognition distance according to an embodiment of the present invention.

In more detail, Figure 11 is a table comparing the change in transmission efficiency and the recognition distance according to the prior art and the embodiment of the present invention, Figure 12 is a change in the diameter of the machining hole according to an embodiment of the present invention FIG. 13 is a graph illustrating a change in transmission efficiency according to an embodiment of the present invention.

According to the present invention, as shown in FIG. 11, the peripheral part of the lead frame is surrounded by the second soft magnetic layer and processed as compared with the embodiment of A which does not surround the peripheral part of the lead frame with the second soft magnetic layer and does not form a processing hole. Even in the embodiment of B forming a hole, there is little difference in transmission efficiency and no difference in recognition distance.

In addition, when changing the diameter (hole radius) of the machining hole (1 mm to 3 mm) as shown in Figure 12, rather, the effect of some transmission efficiency is increased, as shown in Figure 13 the peripheral of the lead frame Is surrounded by a soft magnetic layer (second soft magnetic layer), so the transmission efficiency is very small, so there is no significant difference in the transmission efficiency.

In the detailed description of the invention as described above, specific embodiments have been described. However, many modifications are possible without departing from the scope of the invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined not only by the claims, but also by those equivalent to the claims.

100: receiving device
120: first receiving coil pattern
130: second receiving coil pattern
220: first soft magnetic layer
221: first machining hole
223: adhesive layer
230: second soft magnetic layer
310: polymer layer
311: 2nd machining hole
315: adhesive layer
400: housing
500: transmitting device
520: a first transmission coil pattern
530: second transmission coil pattern
550: soft magnetic layer
600: housing

Claims (16)

A first polymer material layer;
A soft magnetic layer disposed on the first polymer material layer;
A second polymer material layer disposed on the soft magnetic layer; And
And a coil part disposed on the second polymer material layer.
The soft magnetic layer,
A first soft magnetic layer and a second soft magnetic layer disposed to surround side surfaces of the first soft magnetic layer,
The coil unit,
Coil pattern for wireless charging including a plurality of patterns and
It includes a plurality of patterns, including a coil pattern for short-range wireless communication arranged to surround the side of the coil pattern for wireless charging,
The first soft magnetic layer and the second soft magnetic layer include Fe,
The first polymer material layer, the soft magnetic layer, and the second polymer material layer each include a through hole,
The diameter of the through hole of the soft magnetic layer and the diameter of the through hole of the second polymer material layer are different from each other,
The through hole of the first polymer material layer, the through hole of the soft magnetic layer, and the through hole of the second polymer material layer form a through hole overlapping region at least partially overlapping each other.
The through-hole overlapping area is a wireless charging and short-range wireless communication substrate formed on the outside of the outermost pattern of the coil pattern for wireless charging. The method of claim 1,
The through-hole diameter of the soft magnetic layer is a wireless charging and short-range wireless communication substrate larger than the diameter of the through-hole of the second polymer material layer. The method of claim 1,
The second polymer material layer is a wireless charging and short-range wireless communication substrate comprising an extension extending further than the side of the soft magnetic layer. The method of claim 3, wherein
The first polymer material layer includes an extension extending further than a side surface of the soft magnetic layer, wherein the length (l) of the extension of at least one of the first polymer material layer and the second polymer material layer and the thickness of the soft magnetic layer (h) is a wireless charging and short-range wireless communication substrate having the relationship of the following equation.
[Equation]
l = AX h (A is a constant from 0.6 to 10) The method of claim 4, wherein
An extension part of the first polymer material layer and an extension part of the second polymer material layer are connected to each other. The method of claim 1,
The wireless charging and short-range wireless communication substrate further comprising an adhesive layer disposed between the second polymer material layer and the coil portion. The method of claim 1,
The coil pattern for wireless charging is disposed on the first soft magnetic layer, and the coil pattern for short-range wireless communication is disposed on the second soft magnetic layer. The method of claim 7, wherein
Wireless charging and short-range wireless communication substrate further comprising a lead frame connected to the coil unit. The method of claim 7, wherein
The soft magnetic layer further includes at least one of Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y, and Cd. Board for wireless charging and short range wireless communication. The method of claim 1,
Any one of the first polymer material layer and the second polymer material layer is a wireless charging and short-range wireless communication substrate comprising at least one of polyethylene, polyacryl, polyimide, polyamide and polyurethane. The method of claim 1,
The through hole overlapping area is a substrate for wireless charging and short-range wireless communication formed between the outermost pattern of the coil pattern for wireless charging and the outermost pattern of the coil pattern for short-range wireless communication. The method of claim 1,
A wireless charging and short-range wireless communication substrate further comprising an adhesive layer between the soft magnetic layer and the second polymer material layer. The method of claim 12,
The adhesive layer may include a through hole, and at least a portion of the through hole of the adhesive layer may overlap the through hole overlapping area. The method of claim 1,
The through hole overlapping area is a substrate for wireless charging and short-range wireless communication formed in the first soft magnetic layer. The method of claim 1,
The through-hole of the soft magnetic layer is a wireless charging and short-range wireless communication substrate that is a hole for alignment in manufacturing. housing; And,
Includes; the wireless charging and short-range wireless communication substrate disposed in the housing;
The wireless charging and short-range wireless communication substrate,
A first polymer material layer;
A soft magnetic layer disposed on the first polymer material layer;
A second polymer material layer disposed on the soft magnetic layer; And
And a coil part disposed on the second polymer material layer.
The soft magnetic layer,
A first soft magnetic layer and a second soft magnetic layer disposed to surround side surfaces of the first soft magnetic layer,
The coil unit,
Coil pattern for wireless charging including a plurality of patterns and
It includes a plurality of patterns, including a coil pattern for short-range wireless communication arranged to surround the side of the coil pattern for wireless charging,
The first soft magnetic layer and the second soft magnetic layer include Fe,
The first polymer material layer, the soft magnetic layer, and the second polymer material layer each include a through hole,
The diameter of the through hole of the soft magnetic layer and the diameter of the through hole of the second polymer material layer are different from each other,
The through hole of the first polymer material layer, the through hole of the soft magnetic layer, and the through hole of the second polymer material layer form a through hole overlapping region at least partially overlapping each other,
The through hole overlapping area is formed between the outermost pattern of the coil pattern for wireless charging and the outermost pattern of the coil pattern for short-range wireless communication.

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