KR20180130645A - Wireless chargng receiver module - Google Patents

Abstract

A wireless-charging-type wireless power receiving module is disclosed. The wireless-charging-type wireless power receiving module includes a substrate, a magnetic shield sheet, an antenna pattern, and an attractor. The antenna pattern is disposed in a first region between the substrate and the magnetic shield sheet. The attractor is disposed in a second region which is spatially separated from the first region between the substrate and the magnetic shield sheet. The magnetic shield sheet includes one surface close to the substrate and the other surface remote from the antenna pattern. The other surface is entirely exposed to the air. The magnetic shield sheet has a magnetic permeability of 200 to 1,000. It is possible to improve price competitiveness.

Description

[0001] WIRELESS CHARGNG RECEIVER MODULE [0002]

The present invention relates to a wireless charging type wireless power receiving module.

Recently, a wireless charging (WPC) function, a short-range communication (NFC) function, an electronic payment (MST) function and the like have been adopted in a mobile device. Wireless charging (WPC), short range communication (NFC), and electronic payment (MST) technologies differ in operating frequency, data rate, and amount of power transmitted.

Most of the mobile devices have a battery, so regular charging is required. Typical examples of the charging method include a contact charging method and a non-contact charging method. Examples of the non-contact charging method include a wireless power conversion (WPC) method and a power matters alliance (PMA) method.

The WPC method is a technique for charging a battery using magnetic coupling without electrical contact at a short distance. The transmission standard of the WPC system uses a method of periodically transmitting a predetermined signal from the transmission unit to the reception unit and detecting whether the reception unit is located in the transmission unit. In the WPC system, the battery can be charged through magnetic coupling without a separate electrical contact, It is possible to apply to the charging of the battery of the field.

The transmission standard of the PMA system is characterized in that standby power is consumed because a hall sensor is attached to a transmitting unit for transmitting power and the receiving unit is instantaneously located at the transmitting unit.

In the WPC system or the PMA system, a magnetic field is formed by AC power energy generated in the primary coil, a current is induced through the coil of the antenna, and a 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.

The invention seeks to improve the price competitiveness of the wireless power receiving module by simplifying the structure.

The invention seeks to improve the performance of the wireless charging mode wireless power receiving module through design modification.

The problems to be solved by the invention are not limited to those mentioned above, and the problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

The wireless rechargeable wireless power receiving module includes a substrate, a magnetic shield sheet, an antenna pattern, and an attractor.

And the antenna pattern is disposed in the first region between the substrate and the magnetic-shielding sheet.

And the attractor is disposed in a second region that is spatially separated from the first region between the substrate and the magnetic shield sheet.

The magnetic shielding sheet includes one side closer to the substrate and another side far from the antenna pattern, and the other side is entirely exposed to the air.

The magnetic shield sheet has a magnetic permeability of 200 to 1,000.

The details of other embodiments are included in the detailed description and drawings.

The invention can provide a wireless charging mode wireless power receiving module with excellent price competitiveness.

The invention can provide a wireless charging type wireless power receiving module with improved performance.

The effects according to the invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a schematic exploded view of a wireless charging type wireless power receiving module according to an embodiment.
2 is a cross-sectional view of the wireless charging type wireless power receiving module of FIG.
3 is an enlarged view of the P region in Fig.
Figs. 4 and 5 are graphs relating to the heat generation temperature according to the charging time. Fig.
6 is a cross-sectional view of a modification of the wireless charging type wireless power receiving module of FIG.
7 is a schematic exploded view of a wireless charging type wireless power receiving module according to another embodiment.
8 is a cross-sectional view of the wireless charging type wireless power receiving module of FIG.
9 is a cross-sectional view of a modification of the wireless charging type wireless power receiving module of FIG.
FIG. 10 is a schematic diagram of crack spacing in the magnetic field shield sheet. FIG.
11 is an exploded view of a wireless charging type wireless power receiving module according to another embodiment.
12 is a cross-sectional view of the wireless charging type wireless power receiving module of FIG.
13 is a cross-sectional view of a modification of the wireless charging type wireless power receiving module of FIG.
14 is a cross-sectional view of another modification of the wireless charging type wireless power receiving module of FIG.
15 is a cross-sectional view of still another modification of the wireless charging type wireless power receiving module of Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

It is to be understood that the invention is not limited to the details of the disclosure herein described, but may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. And the invention is only defined by the scope of the claims.

A detailed description of the related art may be omitted if it is determined that the technical gist of the present invention may be blurred.

Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of layers and regions in the figures may be exaggerated for clarity of illustration.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one element from another, and it goes without saying that the first element may be the second element unless specifically stated otherwise.

Throughout the specification, each element may be singular or plural, unless specifically stated otherwise.

It is to be understood that throughout the specification, when an element is referred to as being "having", "having", or "having" an element, it should be understood that this does not exclude other elements, It can be included.

In the specification, "A and / or B" means A, B, or A and B unless otherwise indicated, and "C to D" C means more than C and D or less.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, a device being referred to as "directly on" or "directly above " indicates that no other device or layer is interposed in between.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 is a schematic exploded view of a wireless charging type wireless power receiving module according to an embodiment. 2 is a cross-sectional view of the wireless charging type wireless power receiving module of FIG. 3 is an enlarged view of the P region in Fig.

1 to 3, the wireless charging type wireless power receiving module 100 includes a printed circuit board 110, a magnetic shield sheet 120, and an attractor (AT).

The printed circuit board 110 includes a substrate 112, an antenna pattern 114, a circuit, and the like. The printed circuit board 110 may include a wireless charging coil, an electronic payment coil, a near field data communication coil, or the like so as to perform different roles such as wireless power charging, electronic approval, and near field data communication. The wireless charging coil, the electronic payment coil, the near field data communication coil, and the like may be wound in a clockwise or counterclockwise direction and may be formed into a shape such as a circle, an ellipse, a polygon, or a square.

The antenna pattern 114 may be disposed on the substrate 112 and the antenna pattern 114 may include a wireless charging antenna pattern 114a, an MST antenna pattern 114b, and an NFC antenna pattern 114c . For example, on the substrate 112, at least two of the antenna pattern 114 of the wireless charging antenna pattern 114a, the MST antenna pattern 114b, and the NFC antenna pattern 114c may be disposed. The antenna pattern 114 may be disposed in the first region between the substrate 112 and the magnetic shield sheet 120. The first region may be an area spatially separated from a second region described later, and may be located outside the second region.

The substrate 112 is a substrate on which an antenna pattern 114 and a circuit are arranged, and has heat resistance and pressure resistance, and can be a flexible material. For example, the substrate 112 may be a polyimide (PI) film, a PET film, or the like.

The magnetic shield sheet 120 is a plate-like member having a predetermined area, and can shield the magnetic field generated by the radio signal. The magnetic shielding sheet 120 may be designed in such a structure that the magnetic shielding layer 122 is sandwiched between the adhesive films AD of the thin plate and the magnetic shielding layer 122 is formed by bonding the thin shielding sheets The films may be alternately laminated structures or may be a single layer shielding sheet.

The shielding sheet of the thin plate may be made of an amorphous alloy, a nano-crystal alloy, ferrite, or the like. As the amorphous alloy, for example, an Fe-based or a Co-based magnetic alloy may be used. The thin sheet shielding sheet may have a thickness of about 27 mu m, and the thin plate adhesive film may have a thickness of about 3 mu m with an adhesive coated on one or both sides of the base film.

In general, in order to realize the magnetic shielding property of the magnetic shield sheet 120, the amorphous alloy shielding agent or the nanocrystalline alloy shielding agent is difficult to have the thickness of the shielding sheet exceeding about 27 mu m due to its manufacturing characteristics, Several sheets of shielding sheets shall be used. At this time, thin adhesive films are interposed between the plurality of shielding sheets.

Since the magnetic shielding layer 122 or the magnetic shielding sheet 120 has a decreased thermal conductivity as the number of the adhesive films of the thin plate and the thickness of the adhesive film of the thin plate become thicker, the amorphous alloy thin layer shielding sheet or the nanocrystalline alloy thin- The use of a plurality of sheets in a stacked manner not only raises the price of the magnetic shield sheet 120 but also necessitates the use of a separate heat dissipating member due to the low thermal conductivity of the magnetic shield sheet 120 itself, The price competitiveness of the wireless power receiving module 100 may be reduced.

The cost competitiveness of the magnetic shield sheet 120 or the wireless charging type wireless power receiving module 100 can be improved by simplifying the structure of the magnetic shielding layer 122, that is, by using a single-layer shielding sheet .

For the single-layer shielding sheet, a ferrite-based shielding sheet can be used, for example, a MnZn discarded light-shielding sheet can be used. The MnZn ferrite-based shielding sheet may include cracks, wherein the permeability may be 200 to 1,000 in the frequency range of 50 kHz to 14 MHz.

The magnetic shield sheet 120 may have, for example, a permeability of 200 to 400. [ The magnetic shield sheet 120 may have, for example, a permeability of 400 to 600. [ The magnetic shield sheet 120 may have a permeability of 600 to 800. [ The magnetic shield sheet 120 may have a permeability of 800 to 1,000.

The magnetic permeability of the magnetic shield sheet 120 can be adjusted by adjusting the interval of the cracks, and the details will be described later with reference to FIG.

When the magnetic shielding layer 122 is composed of a single-layer MnZn ferrite-based shielding sheet, the wireless charging type wireless power receiving module 100 may not include a separate heat-radiating sheet (Tables 1 to 4, 5).

In this case, the other surface 120U of the magnetic shielding sheet 120 may be configured as the outermost layer or the uppermost layer in the drawing of the wireless charging type wireless power receiving module 100. At this time, on the other surface 120U, Other components, such as the same, may not be deployed. That is, the entire surface or the entire surface of the other surface 120U may be directly exposed to air. In the specification, one surface 120L may be defined as a surface closer to the substrate 112, and the other surface 120U may be defined as a surface positioned away from the substrate 112. [ One surface 120L may be in contact with the antenna pattern 140 at a part.

The adhesive layer AD may include a first adhesive film 121 and a second adhesive film 123 and the first adhesive film 121 may be formed from the substrate 112 And the first adhesive film 121 may be exposed to the air in front of the entire surface or the entire surface of the other surface 121U. The one surface may be defined as the surface of the first adhesive film 121 positioned close to the substrate 112 and the other surface 121U may be defined as the surface of the first adhesive film 121 located away from the substrate 112. [ As shown in FIG.

The second adhesive film 123 may be in direct contact with the antenna pattern 114a for wireless charging, for example, on one side 123L. One side 123L may be defined as the surface of the second adhesive film 123 positioned close to the substrate 112 and the other surface may be defined as the second adhesive film 123 positioned away from the substrate 112. [ As shown in FIG.

The thickness H of the magnetic shielding layer 122, that is, the thickness of the shielding sheet of the single layer may be more than 27 mu m and not more than 200 mu m when the magnetic shielding layer 122 is composed of a single-layer MnZn ferrite shielding sheet, For a shielding characteristic implementation, the thickness H of the magnetic shielding layer 122 may be, for example, 120 [mu] m.

Hereinafter, the effect produced when the magnetic shielding layer 122 is composed of a single-layer MnZn ferrite-based shielding sheet will be described in detail.

First, the MnZn ferrite has lower investment loss than the metal-based amorphous shielding agent, and thus generates less heat during wireless charging at a driving frequency of 100 kHz (see Table 1, Table 2, and I in FIG. 4). FIG. 4 is a graph showing the heat generation temperature according to the charging time according to the type of shielding agent, and shows the result of measuring initial heat generation characteristics. Table 2 summarizes the temperature measurement values for each time zone.

division Shield Type Kinds Measuring frequency characteristic Amorphous metal alloy Nanocrystalline alloy MnZn ferrite MST 70 kHz Investment ratio 531 543 621 Investment loss 7 30 One WPC 100 kHz Investment ratio 537 556 573 Investment loss 13 43 One NFC 13.56 kHz Investment ratio 115 249 309 Investment loss 145 182 198

division Amorphous metal alloy Nanocrystalline alloy MnZn ferrite Heating temperature Time (minutes) Temperature (℃) 10 45.7 45.8 42.5 20 46.7 46.5 43.8 30 47.4 46.8 44.6 40 47.8 47.0 45.2 50 48.2 47.0 45.6 60 48.4 47.0 45.8

MnZn ferrite has thermal conductivity and thermal diffusivity higher than that of a metal amorphous shielding agent so that heat dissipation characteristics similar to the structure in which a graphite is attached to a metal shielding agent can be realized without a heat dissipation material such as graphite (Table 2, Table 3, See II in Fig. 5).

FIG. 5 is a graph of the heat generation temperature according to the charging time for each type of shielding agent. FIG. 5 shows the result of measuring heat radiation and heat generation characteristics when 60 minutes have elapsed. Referring to FIG. 5, MnZn ferrite has a slope similar to that of an amorphous metal-based alloy. Table 2 summarizes the temperature measurement values for each time zone.

division Shield Type Amorphous metal alloy Nanocrystalline alloy MnZn ferrite Thermal Diffusivity (mm ² / s) 0.17 0.20 0.35 Thermal conductivity (W / mK) 0.42 0.51 0.88

Table 4 summarizes the wireless charging efficiency according to the type of shielding agent and the input current.

division Shield Type Amorphous metal alloy Nanocrystalline alloy MnZn ferrite thickness 4 layer 4 layer 1 layer (120 탆) Charging efficiency Current (mA) efficiency(%) 400 76.2 75.1 76.8 500 76.9 75.7 76.6 600 76.4 75.6 76.2 700 75.6 74.8 75.4 800 74.3 73.8 74.8 900 73.0 72.2 74.1 1000 71.0 69.9 71.1

The magnetic shield sheet 120 may include an opening 140 and the opening 140 may be a through hole penetrating the magnetic shield sheet 120 into which the portion of the attractor AT is mounted .

The attractor (AT) is disposed in the second region between the substrate (112) and the magnetic shielding sheet (120). As described above, the first region and the second region are spatially separated regions.

The attractor (AT) may be made of a magnetic piece of a thin plate, and the magnetic piece of the thin plate may be made of, for example, Si-Fe, ferrite, permalloy, polymer or the like. The attractor AT may include a first part 130 and a second part 131 and a second part 131 may be disposed on the substrate 112, And may be disposed on the second part 131. The first part 130 may be mounted to the opening 140.

The second part 131 may be disposed in the second area between the substrate 112 and the first part 130. As described above, the first region and the second region are spatially separated regions.

When the magnetic shielding layer 122 is composed of a single layer of a MnZn ferrite-based shielding sheet, the entire surface or the whole surface of the other surface 130U of the first part 130 may be directly exposed to the air, And may be in contact with some of the antennas that make up the antenna pattern 114. One surface 131L can be defined as the surface of the first part 130 located closer to the substrate 112 and the other surface 130U can be defined as the surface of the first part 130 ). ≪ / RTI >

The one surface 130L of the first part 130 may be designed to have a larger area than the opposing surface of the second part 131. [ The first part 130 may be arranged so that a part thereof overlaps with a part of the antenna pattern 140. In this case, for example, the attractor (AT) can be designed in a T shape. One surface 130L of the first part 130 may be disposed so as to overlap with all of the wireless antenna pattern 114a.

6 is a cross-sectional view of a modification of the wireless charging type wireless power receiving module of FIG. Hereinafter, only the differences between the wireless charging type wireless power receiving module 101 and the wireless charging type wireless power receiving module 100 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

Referring to FIG. 6, the wireless charging type wireless power receiving module 101 includes a substrate 112, and a receiving part includes a part of the AT, specifically, a second part 131 And is different from the wireless charging type wireless power receiving module 100 in that it is mounted. The thickness t2-t1 of the receiving groove is smaller than the thickness t2 of the substrate 112, so that the receiving groove does not penetrate the substrate 112. [

A part of the receiving groove AT is mounted so that the thickness of the AT is increased so that the performance of the AT can be improved.

FIG. 7 is a schematic exploded view of a wireless charging type wireless power receiving module according to another embodiment, and FIG. 8 is a sectional view of the wireless charging type wireless power receiving module of FIG. Hereinafter, only differences between the wireless charging type wireless power receiving module 102 and the wireless charging type wireless power receiving module 100 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

7 and 8, the wireless charging type wireless power receiving module 102 is different from the wireless charging type wireless power receiving module 100 in that the heat radiation sheet CS is disposed on the magnetic shielding sheet 120, . The heat-radiating sheet CS may be made of, for example, graphite.

The heat-radiating sheet CS may be disposed on the magnetic shield sheet 120 irrespective of the structure or material of the magnetic shield layer 122. That is, when the magnetic shielding layer 122 has a structure in which, for example, amorphous alloy thin-film shielding sheets and thin-layer adhesive films are alternately stacked, and the case where the nanocrystalline alloy thin- The heat-radiating sheet CS can be disposed on the magnetic shielding sheet 120, not only when it has a laminated structure but also when it is composed of a single-layer MnZn ferrite-based shielding sheet.

9 is a cross-sectional view of a modification of the wireless charging type wireless power receiving module of FIG. Hereinafter, only differences between the wireless charging type wireless power receiving module 102 and the wireless charging type wireless power receiving module 101 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

 Referring to FIG. 9, the wireless charging type wireless power receiving module 102 includes a substrate 112, and a receiving part includes a part of the AT, specifically, a second part 131 And is different from the wireless charging type wireless power receiving module 101 in that it is mounted. The thickness t2-t1 of the receiving groove is smaller than the thickness t2 of the substrate 112, so that the receiving groove does not penetrate the substrate 112. [

Fig. 10 is a schematic diagram of crack spacing in the magnetic field shielding sheet. Referring to FIG. 10, the magnetic shield sheet 120 may include a first compartment WPC and a second compartment NFC.

The first section WPC may correspond to, for example, a wireless charging area, and the second section NFC may correspond to a short range wireless communication area. The second compartment (NFC) may be disposed outside the first compartment (WPC). 1 and 10, the first compartment WPC may correspond to the wireless charging antenna pattern 114a, and the second compartment NFC may correspond to the NFC antenna pattern 114c.

The permeability of the first compartment WPC and the second compartment NFC are different from each other. For example, the second compartment NFC may have a lower permeability than the first compartment WPC. For example, the permeability of the first compartment (WPC) and the second compartment (NFC) may be substantially the same. The permeability of the first compartment WPC can be adjusted by increasing the interval W2 of the cracks C2. For example, by adjusting the interval W1 of the cracks C1 of the second section NFC to be equal to or larger than the interval W2 of the cracks C2 of the first section WPC, The high frequency performance can be improved.

FIG. 11 is an exploded view of a wireless charging type wireless power receiving module according to another embodiment, and FIG. 12 is a sectional view of the wireless charging type wireless power receiving module of FIG. Hereinafter, only differences between the wireless charging type wireless power receiving module 10 and the wireless charging type wireless power receiving module 100 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

11 and 12, the wireless charging type wireless power receiving module 10 differs from the wireless charging type wireless power receiving module 100 in that no opening is formed in the magnetic shielding sheet 120. [ The wireless charging type wireless power receiving module 10 differs from the wireless charging type wireless power receiving module 100 in that the attractor (AT) is composed of only the second part and does not include the first part .

The magnetic shield sheet 120 may be formed such that a part of the one surface 120L may directly contact the attractor AT and the whole or the front surface of the other surface 120U may be formed as a top layer of the wireless power receiving module 10 And exposed to air. Although not shown, a heat-radiating sheet may be disposed on the other surface 120U of the magnetic shielding sheet 120. [

13 is a cross-sectional view of a modification of the wireless charging type wireless power receiving module of FIG. Hereinafter, only differences between the wireless charging type wireless power receiving module 11 and the wireless charging type wireless power receiving module 101 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

Referring to FIG. 13, the wireless charging type wireless power receiving module 11 differs from the wireless charging type wireless power receiving module 101 in that no opening is formed in the magnetic shielding sheet 120. In addition, the wireless charging type wireless power receiving module 11 is different from the wireless charging type wireless power receiving module 101 in that the attractor (AT) is composed of only the second part and does not include the first part .

The magnetic shield sheet 120 may be formed such that a part of the one surface 120L may directly contact the attractor AT and the whole or the front surface of the other surface 120U may be formed as a top layer of the wireless power receiving module 10 And exposed to air. Although not shown, a heat-radiating sheet may be disposed on the other surface 120U of the magnetic shielding sheet 120. [

14 is a cross-sectional view of another modification of the wireless charging type wireless power receiving module of FIG. Hereinafter, only the difference between the wireless charging type wireless power receiving module 12 and the wireless charging type wireless power receiving module 100 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

Referring to FIG. 14, the wireless charging type wireless power receiving module 12 differs from the wireless charging type wireless power receiving module 100 in that the AT (AT) is not designed in a T shape. The wireless charging type wireless power receiving module 12 is different from the wireless charging type wireless power receiving module 101 in that the AT (AT) is composed of only the second part and does not include the first part.

Although not shown, it is not excluded that the T-shaped attractor (AT) is applied to the wireless charging type wireless power receiving module 12, and the first part and the second part are configured as separate members, And the second part are integrally formed. It is also possible that both the first part and the second part are made of different materials and that the first part and the second part are made of the same material. Further, although not shown, a heat-radiating sheet may be disposed on the other surface 120U of the magnetic shielding sheet 120. [

15 is a cross-sectional view of still another modification of the wireless charging type wireless power receiving module of Fig. Hereinafter, only differences between the wireless charging type wireless power receiving module 13 and the wireless charging type wireless power receiving module 101 will be described in detail, and the same components and the same structure have been described in detail above , And a detailed description thereof will be omitted.

15, the wireless charging type wireless power receiving module 13 is different from the wireless charging type wireless power receiving module 101 in that the AT (AT) is not designed in a T shape. The wireless charging type wireless power receiving module 13 differs from the wireless charging type wireless power receiving module 101 in that the attractor (AT) is composed of only the second part and does not include the first part.

Although not shown, it is not excluded that the T-shaped attractor (AT) is applied to the wireless charging type wireless power receiving module 13, and the first part and the second part are configured as separate members, And the second part are integrally formed. It is also possible that the first part and the second part are made of different materials and that the first part and the second part are made of the same material. Further, although not shown, a heat-radiating sheet may be disposed on the other surface 120U of the magnetic shielding sheet 120. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10, 11, 12, 13, 100, 101, 102, 103: Wireless charging type wireless power receiving module
110: printed circuit board
112: substrate
114: antenna pattern
114a: wireless charging antenna pattern
114b: MST antenna pattern
114c: NFC antenna pattern
120: magnetic field shielding sheet, AD: adhesive layer, 122: magnetic shielding layer
AT: Attractor, 130: Part 1, 131: Part 2
CS: Heat-radiating sheet

Claims (8)

Board;
A magnetic shielding sheet having a permeability of 200 to 1,000;
An antenna pattern disposed in a first region between the substrate and the magnetic shielding sheet; And
And an attractor disposed in a second region that is spatially separated from the first region between the substrate and the magnetic shield sheet,
Wherein the magnetic shielding sheet includes one surface close to the substrate and a surface farther from the substrate, all of the surfaces being exposed in the air,
Wireless charging method wireless power receiving module. The method according to claim 1,
Wherein the magnetic shielding sheet comprises:
The first adhesive film,
A second adhesive film, and
A single layer of a magnetic shielding layer disposed between the first adhesive film and the second adhesive film,
Wherein the magnetic shield layer is composed of ferrite,
Wherein the first adhesive film is disposed farther from the substrate than the second adhesive film, and the first adhesive film is entirely exposed in the air. The method according to claim 1,
Wherein the magnetic shield layer has a thickness of more than 27 占 퐉 and not more than 200 占 퐉,
Wireless charging method wireless power receiving module. The method according to claim 1,
Wherein the magnetic shielding sheet further comprises an opening,
Wherein the attractor is partly mounted on the opening,
Wireless charging method wireless power receiving module. 5. The method of claim 4,
Wherein the attractor is configured such that all of the one surface remote from the substrate is exposed to air,
Wireless charging method wireless power receiving module. The method according to claim 1,
The substrate further includes a receiving groove,
Wherein the attractor is partly mounted on the receiving groove,
Wireless charging method wireless power receiving module. The method according to claim 6,
Wherein the magnetic shielding sheet further comprises an opening,
Wherein the attractor is mounted on the opening,
Wireless charging method wireless power receiving module. 8. The method of claim 7,
Wherein the attractor is configured such that all of the one surface remote from the substrate is exposed to air,
Wireless charging method wireless power receiving module.

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