KR102130026B1 - Wireless communication and charge substrate and wireless communication and charge device - Google Patents

Abstract

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

Description

Wireless charging and communication board and wireless charging and communication device{WIRELESS COMMUNICATION AND CHARGE SUBSTRATE AND WIRELESS COMMUNICATION AND CHARGE DEVICE}

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

NFC (Near Field Communication) is one of the radio tag (RFID) technology.It is a smart card type contactless communication technology that uses a 13.56 MHz frequency band.WPC (Wireless Power Conversion) is a wireless charging technology that performs magnetic coupling without electrical contact at a short distance. It is a non-contact charging technology that uses a battery to charge.

NFC enables wireless communication between electronic devices at low power at a short distance, and is a next-generation short-range communication technology that is attracting attention due to its relatively high security and low price due to the short communication distance. It has the advantage of a large space, a wide range of applicable services, and the WPC can charge the battery through magnetic coupling without additional electrical contact, so it can be applied to battery charging in various fields.

The antennas in the NFC and WPC systems are composed of coils of a certain area, and the energy required for the operation of the microchip is provided from the reader. A magnetic field is formed by AC power energy generated in the primary coil, and a current is induced through the coil of the antenna, and a voltage is generated by the inductance of the antenna. The voltage generated in this way is used as power for data transmission or for charging the battery.

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

The present invention has been devised to solve the above-mentioned problems, and is intended to enable wireless power conversion (WPC) and near field communication (NFC).

In addition, according to the present invention, by minimizing the portion where the soft magnetic layer is exposed to the air, foreign matter is introduced from the outside, and according to an embodiment of the present invention, the soft magnetic layer is arranged to surround the lead frame at regular intervals, thereby leading It is intended to solve the problem that the transmission efficiency during charging is reduced or the recognition distance during data communication is reduced even when the frame is arranged.

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.

A substrate for wireless charging and short-range wireless communication according to an embodiment of the present invention includes a first polymer film; A soft magnetic layer disposed on the first polymer film; A second polymer film disposed on the soft magnetic layer; And a coil portion disposed on the second polymer film, wherein the coil portion includes a first antenna including a plurality of turns and a second antenna disposed outside the first antenna and including a plurality of turns; Included, the first polymer film includes a plurality of holes including a first hole and a second hole and a first extension extending further in a first direction than an outermost side of the soft magnetic layer, wherein the second polymer film is It includes a plurality of holes including a third hole and a fourth hole and a second extension extending further in the first direction than the outermost surface, and the first extension and the second extension form a connection region connected to each other And, the connection area is spaced apart from the outermost surface, further extending in an outer direction of the outermost surface, and the first hole and the second hole are spaced from each other.

The first antenna may be disposed between the first hole and the second hole.

The first hole and the third hole may be formed at positions corresponding to each other, and the second hole and the fourth hole may be formed at positions corresponding to each other.

The first hole and the second hole may be formed outside the first antenna.

The first hole and the second hole may be formed outside the outermost turn of the first antenna.

The innermost turn of the first antenna may be arranged on an imaginary line connecting the center of the first hole and the center of the second hole.

At least one of the first hole and the second hole may be formed between the outermost turn of the second antenna and the outermost turn of the first antenna.

The length l of at least one of the first extension portion and the second extension portion and the thickness h of the soft magnetic layer may have a relationship of the following equation.

[Mathematics]

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

The soft magnetic layer may include a first soft magnetic layer and a second soft magnetic layer.

The second soft magnetic layer may be disposed on a side surface of the first soft magnetic layer.

The second soft magnetic layer may be disposed on the first soft magnetic layer.

The soft magnetic layer includes at least one of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd can do.

At least one of the first polymer film and the second polymer film may include at least one of polyethylene, polyacrylic, polyimide, polyamide, and polyurethane.

At least one of the first hole and the second hole may be a hole for aligning alignment during manufacturing.

A portable terminal according to an embodiment of the present invention includes the wireless charging and short-range wireless communication substrate; And a housing accommodating the substrate for wireless charging and short-range wireless communication.

According to an embodiment of the present invention, wireless power transmission and reception (Wireless Power Conversion, 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 in the air, it minimizes the inflow of foreign substances from the outside, and according to an embodiment of the present invention, the soft magnetic layer surrounds the lead frame at regular intervals. This arrangement can solve the problem of reducing the transmission efficiency during charging or reducing the recognition distance during data communication even when the lead frame is disposed.

In addition, according to another embodiment of the present invention, through the addition of a soft magnetic layer, it is possible to control or improve the transmission efficiency at the time of 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 showing a coil pattern 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.
8 is a top view showing 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 explaining transmission efficiency and recognition distance according to an embodiment of the present invention.

Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, in the description of the embodiment, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, the size of each component in the drawings may be exaggerated for explanation, and does not mean the size 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 illustrated in FIG. 1, a wireless charging and communication device according to an embodiment of the present invention may constitute the receiving device 100.

The receiving device 100 and the transmitting device 500 are capable of wireless power conversion (WPC) and 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 short-range wireless Coil pattern for communication (NFC).

In addition, the transmission apparatus 500 includes transmission coil patterns 520 and 530, 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 to the first receiving coil pattern 120 that is physically separated by electromagnetic induction.

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

On the other hand, the transmitting device 500 according to an embodiment of the present invention may be composed of a transmitting pad (pad), the receiving device 100 is a portable terminal to which wireless power transmission and reception technology is applied, household / personal electronic products, transportation A portable terminal, a household/personal electronic product, a transportation means, etc., which is configured as a part of a component, or to which wireless power transmission/reception technology is applied, includes only a wireless power receiving device, or alternatively, both a wireless power transmitting device and a wireless power receiving device It can be configured to include.

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

The receiving device 100 includes a wireless charging and communication board and a housing 400 that accommodates the wireless charging and communication board, and the housing 400 receives heat generated from the coil patterns 120 and 130 to the outside. It can radiate heat.

On the other hand, the wireless charging and communication substrate is a soft magnetic layer (220, 230), the soft magnetic layer (220, 230) is disposed on one surface and the other surface, the soft magnetic layer (220, 230) of the polymer material layer extending beyond the exposed portion (310, 312), including the coil pattern (120, 130) disposed on the polymer material layers (310, 312), the processing hole 311 through the wireless charging and communication substrate is formed is frozen during manufacturing It can be used to align the alignment.

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

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

Meanwhile, the soft magnetic layers 220 and 230 are disposed to surround the first soft magnetic layer 220 on the same plane where the first soft magnetic layer 220 and the first soft magnetic layer 220 are disposed. It may include (230).

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

The transmitting device 500 includes a soft magnetic layer 550, a transmitting 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 configuration capable of wireless power transmission and reception (WPC) including the first soft magnetic layer 220 and the first coil pattern 120, and the second soft magnetic layer 230 and the second coil The short-range wireless communication (NFC) including the pattern 130 includes all the configurations, and may provide both wireless power transmission and reception (WPC) and short-range wireless communication (NFC).

Meanwhile, in another embodiment, the first transmission coil pattern 520 is composed of a coil pattern for short-range wireless communication (NFC), and the second transmission coil pattern 530 is a coil pattern for wireless power transmission and reception (WPC). It can be composed of.

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

2, the wireless charging and communication substrate according to an embodiment of the present invention is disposed on one side and the other side of the soft magnetic layer (220, 230), the soft magnetic layer (220, 230), the soft magnetic layer ( The polymer material layers 310 and 312 extending from the exposed portions of 220 and 230 include 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 It is composed of a soft magnetic layer 230, and the coil patterns 120 and 130 are composed of a first coil pattern 120 and a 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 have the relationship of Equation 1 below. Can be formed.

[Equation 1]

l = A X h

At this time, 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 layers 220 and 230, and 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 cover the soft magnetic layers 220 and 230, and moisture may penetrate. If the A value exceeds 10, the polymer Since the material layers 310 and 312 are excessively extended and easily bent from external impacts, they may be easily damaged or a separate storage portion may be added, which may cause a problem of an increase in thickness.

Further, 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 made of an amorphous ribbon, and the second soft magnetic layer The 230 may be made of any one of composite, ferrite, Ni-Zn, and Mn-Zn materials.

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 composite, ferrite, and Ni- When the material is made of any one of Zn and Mn-Zn, data communication loss is reduced.

When the soft magnetic layer 120 is made of a ferrite material, it may be implemented in various forms such as a sintered body, a plate, a ribbon, a foil, a film, Fe, 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 on the polymer material layer 310 in regions corresponding to the first soft magnetic layer 220. 2 may include a second coil pattern 130 disposed in a region corresponding to the soft magnetic layer 230.

At this time, the coil patterns 120 and 130 may be configured to adhere to the polymer material layer 310 by an 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.

3, the wireless charging and communication substrate according to another embodiment of the present invention is disposed on one side and the other side of the soft magnetic layer (220, 230), the soft magnetic layer (220, 230), the soft magnetic layer It includes a polymer material layer (310, 312) extending from the exposed portion of (220, 230), the coil pattern 120, 130 disposed on the polymer material layer (310, 312).

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

Therefore, in the embodiment of FIG. 3, the exposed portion is an end exposed by the processing hole 311, and moisture penetrates from the outside by the polymer material connecting end 313 surrounding the exposed portion of the soft magnetic layer 220 as described above. Can block things.

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

According to one embodiment shown in Figures 4 and 5, without the configuration of the adhesive layer 315 for bonding the polymer material layer (310, 312) to the soft magnetic layer (220, 230), the polymer material layer (310, 312) is opened It is formed directly on the magnetic layers 220 and 230.

At this time, the polymer material layers 310 and 312 may be directly formed on the soft magnetic layers 220 and 230 through thermal compression.

4 and 5, when the polymer material layers 310 and 312 are directly formed on the soft magnetic layers 220 and 230, as in the embodiment, since the adhesive layer is not required, the process is simplified and the manufacturing cost is reduced and thinner. Wireless charging and communication substrates can be produced.

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

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

In addition, Figure 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 an adhesive layer 135 as shown in FIG. 2, or disposed on a separate substrate 110 as shown in FIG. 6. Can be.

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

In addition, the wireless charging and communication substrate further includes a lead frame 140 connected to the coil patterns 120 and 130 as illustrated in FIGS. 7 and 8, and the second soft magnetic layer 230 includes the lead frame ( 140).

In more detail, the second soft magnetic layer 230 may be arranged to surround at regular intervals of 1 mm to 3 mm from the lead frame 140 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, even when the lead frame 140 is disposed, there is no problem that the transmission efficiency during charging decreases or the recognition distance during data communication decreases.

In addition, the exposed portion of the end for connecting the lead frame 140 further comprises a polymer material layer 310, 312 extending from the soft magnetic layers 220, 230 as shown in FIG. As shown, it may be configured to further include a polymer material connecting end 313 surrounding the ends of the polymer material layers 310 and 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 first and second by the adhesive layer 315. The soft magnetic layers 220 and 230 may be adhered and disposed.

Further, a processing hole 311 may be formed in the polymer material layers 310 and 312 and the soft magnetic layer 220.

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

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, the wireless charging and communication board according to an embodiment may be configured in such a way that soft magnetic layers 220 and 230 are attached to one side and the other side of the adhesive layer 223, respectively.

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

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

In more detail, FIG. 11 is a table comparing changes in transmission efficiency and recognition distance according to the prior art and an embodiment of the present invention, and FIG. 12 shows a change in the diameter of a machining hole according to an embodiment of the present invention. It is a graph showing a change in transmission efficiency, and FIG. 13 is a graph showing a change in transmission efficiency according to the spacing of the soft magnetic layer according to an embodiment of the present invention.

According to the present invention, as shown in FIG. 11, compared to the embodiment of A which does not surround the lead frame with a second soft magnetic layer and does not form a machining hole, the lead frame is surrounded with a second soft magnetic layer and processed. 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 the hole diameter of the machining hole is changed to 1 mm to 3 mm, as shown in FIG. 12, rather, an effect of partially increasing the transmission efficiency occurs, and as shown in FIG. 13, the periphery of the lead frame When the case is surrounded by a soft magnetic layer (the second soft magnetic layer), the transmission efficiency is very small, so there is no significant difference in transmission efficiency.

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

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 material layer
311: second machining hole
315: adhesive layer
400: housing
500: transmitting device
520: first transmission coil pattern
530: second transmission coil pattern
550: soft magnetic layer
600: housing

Claims (15)

A first polymer film;
A soft magnetic layer disposed on the first polymer film;
A second polymer film disposed on the soft magnetic layer; And
Includes; coil portion disposed on the second polymer film;
The coil unit includes a first antenna including a plurality of turns and a second antenna disposed outside the first antenna and including a plurality of turns;
The first polymer film includes a plurality of holes including a first hole and a second hole, and a first extension extending further in a first direction than an outermost side of the soft magnetic layer,
The second polymer film includes a plurality of holes including a third hole and a fourth hole, and a second extension portion extending further in the first direction than the outermost surface,
The first extension portion and the second extension portion form a connection region connected to each other,
The connection area is spaced apart from the outermost surface, further extending in an outer direction of the outermost surface, the first hole and the second hole are spaced apart from each other for wireless charging and short-range wireless communication substrate.
According to claim 1,
A substrate for wireless charging and short-range wireless communication in which the first antenna is disposed between the first hole and the second hole.
According to claim 2,
The first hole and the third hole are formed at positions corresponding to each other, and the second hole and the fourth hole are formed for wireless charging and short-range wireless communication substrates formed at positions corresponding to each other.
According to claim 3,
The first hole and the second hole are wireless charging and short-range wireless communication substrate formed on the outside of the first antenna.
According to claim 4,
The first hole and the second hole are a substrate for wireless charging and short-range wireless communication formed outside the outermost turn of the first antenna.
The method of claim 5,
A substrate for wireless charging and short-range wireless communication in which an innermost turn of the first antenna is disposed on a virtual line connecting the center of the first hole and the center of the second hole.
According to claim 3,
At least one of the first hole and the second hole is a substrate for wireless charging and short-range wireless communication formed between the outermost turn of the second antenna and the outermost turn of the first antenna.
According to claim 3,
A substrate for wireless charging and short-range wireless communication, wherein at least one length (l) of the first extension portion and the second extension portion and the thickness (h) of the soft magnetic layer have a relationship of the following equation.
[Mathematics]
l = AX h (A is a constant from 0.6 to 10)
The method of claim 8,
The soft magnetic layer includes a first soft magnetic layer and a second soft magnetic layer for wireless charging and short-range wireless communication substrate.
The method of claim 9,
The second soft magnetic layer is a substrate for wireless charging and short-range wireless communication disposed on the side of the first soft magnetic layer.
The method of claim 9,
The second soft magnetic layer is a substrate for wireless charging and short-range wireless communication disposed on the first soft magnetic layer.
According to claim 1,
The soft magnetic layer includes at least one of Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y and Cd Substrate for wireless charging and short-range wireless communication.
The method of claim 12,
A substrate for wireless charging and short-range wireless communication, wherein at least one of the first polymer film and the second polymer film includes at least one of polyethylene, polyacrylic, polyimide, polyamide, and polyurethane.
According to claim 1,
At least one of the first hole and the second hole is a substrate for wireless charging and short-range wireless communication, which is a hole for aligning alignment during manufacturing.
The substrate for wireless charging and short-range wireless communication according to any one of claims 1 to 14; And
A housing for accommodating the substrate for wireless charging and short-range wireless communication; including a mobile terminal.

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