KR20200032620A - The method of manufacturing shilding sheet and shilding sheet - Google Patents

Abstract

Provided is a method of manufacturing a magnetic field shielding sheet. According to one embodiment of the present invention, the method of manufacturing a magnetic field shielding sheet is provided to manufacture the magnetic field shielding sheet separated into a plurality of pieces. The method comprises the steps: preparing a magnetic sheet made of a magnetic material and having a first area; and punch-blanking a shielding sheet, which has a second area relatively narrower than the first area, from the magnetic sheet by using a mold, so as to separate the shielding sheet from the magnetic sheet, wherein in the step of punch-blanking the shielding sheet from the magnetic sheet, at least one linear slit is formed through the inner region of the second area by the mold, so that the shielding sheet, while being divided in the size of the second area from the magnetic sheet, can be separated into a plurality of pieces.

Description

Method for manufacturing a magnetic field shielding sheet and a magnetic field shielding sheet produced thereby {The method of manufacturing shilding sheet and shilding sheet}

The present invention relates to a method for manufacturing a magnetic field shielding sheet, and more specifically, by applying an improved process, dividing the magnetic field shielding sheet into a plurality of pieces, thereby simplifying the process and manufacturing a magnetic field shielding sheet capable of reducing manufacturing cost. It relates to a method and an electronic device produced thereby, such as a magnetic field shielding sheet for wireless charging.

Mobile terminal devices including mobile phones and tablet PCs include various functions such as near field wireless communication (NFC) and wireless charging using a magnetic field.

Therefore, the portable terminal device uses a magnetic field shielding sheet to prevent heat generated by eddy current caused by the magnetic field and to improve performance.

In other words, near field communication (NFC) and wireless charging are essentially non-contact transmission, so a magnetic field shielding sheet made of magnetic material is used to focus the magnetic field generated by the primary coil of the transmitting device to the secondary coil of the receiving device. .

As such a magnetic field shielding sheet, it is common to use a magnetic material such as an amorphous metal ribbon, ferrite, or a polymer sheet containing magnetic powder.

At this time, a technique for separating the magnetic field shielding sheet into a plurality of pieces has been proposed to greatly reduce the loss due to eddy current.

For this reason, the magnetic field shielding sheet separated into a plurality of pieces can increase the communication distance and charging efficiency by increasing the quality factor (Q) of the secondary coil while blocking the effect of the magnetic field on the body and battery of the portable terminal device. .

For example, the magnetic field shielding sheet may be separated into a plurality of pieces through a flake process.

That is, in the flake process, the magnetic field shielding sheet can be separated into a plurality of pieces by passing the magnetic field shielding sheet between a metal roller having a plurality of uneven or spherical balls on the outer surface and a rubber roller disposed to face the metal roller.

 Accordingly, since a separate flake process is added to separate the magnetic field shielding sheet into pieces, there is a problem of increasing the production cost due to the addition of the manufacturing process.

In addition, the flake process performed through a pair of rollers is difficult to control the size of pieces separated from each other because the entire area is pressed while the magnetic field shielding sheet passes between the pair of rollers. Accordingly, the magnetic field shielding sheet manufactured through the conventional flake process is difficult to produce to have various permeability.

The present invention was devised in view of the above points, and a method for manufacturing a magnetic field shielding sheet that can be separated into a plurality of pieces through a straight slit and cracks caused therefrom by forming at least one straight slit during the punching process, and There is an object to provide a magnetic field shielding sheet produced thereby.

In addition, another object of the present invention is to provide a method for manufacturing a magnetic field shielding sheet capable of variously controlling the magnetic permeability of the shielding sheet by adjusting the size and number of pieces separated from each other and the magnetic field shielding sheet produced thereby.

In order to achieve the above object, the present invention is to manufacture a magnetic field shielding sheet formed separately from a plurality of pieces, comprising a magnetic material, preparing a magnetic sheet having a first area; And a step of punching a shielding sheet from the magnetic sheet using a mold to separate a shielding sheet having a second area relatively narrower than the first area from the magnetic sheet. Step of punching the magnetic field shielding sheet to form at least one straight slit in the inner area of the second area through the mold so that the shielding sheet can be separated into a plurality of pieces while being separated from the magnetic sheet by a second area. It provides a method of manufacturing.

In addition, the mold may include a ring-shaped edge blade for processing the edge of the shielding sheet, and at least one linear blade for forming the linear slit.

In addition, the straight slit may be formed along a thickness direction of the shielding sheet having a predetermined length, and the shielding sheet may be formed into a plurality of pieces through cracks caused by at least one of the straight slit and the rim of the shielding sheet. Can be separated.

For example, the shielding sheet may include a plurality of straight slits formed locally in the inner region, and the plurality of straight slits may be radially formed based on a virtual center point.

As another example, the shielding sheet may include a plurality of linearly formed slits spaced apart from each other in the inner region, and the plurality of straightened slits may be formed in a direction perpendicular to the width direction or the longitudinal direction of the shielding sheet. At least one of the first slit, the second slit formed in a direction parallel to the width direction or the longitudinal direction of the shielding sheet, and the third slit formed at an angle with respect to the width or length direction of the shielding sheet It may include the above.

At this time, the shielding sheet may include a plurality of linear slits formed at a distance from each other in the inner region, and the plurality of linear slits may not be directly connected to each other.

In addition, at least one of the upper and lower surfaces of the magnetic sheet may include a release film attached via an adhesive layer coated with an adhesive on both sides of the substrate, and the step of punching a shielding sheet from the magnetic sheet may include The edge blade may be performed to penetrate both the magnetic sheet and the release film.

In addition, the magnetic sheet is a single-layer ribbon sheet comprising at least one or more of an amorphous alloy and a nano-crystalline alloy, or a multi-layered ribbon sheet comprising at least one or more of an amorphous alloy and a nano-crystalline alloy through an adhesive layer It may be a ribbon sheet.

Meanwhile, the present invention is a magnetic field shielding sheet in which a shielding sheet made of a magnetic material is separated into a plurality of pieces, the plurality of pieces including pieces having different sizes and shapes, and the pieces are the shielding sheets At least one straight slit formed along the thickness direction of the, and may be separated from each other through a crack derived from at least one of the rim of the straight slit and the shielding sheet.

Further, the magnetic field shielding sheet may include an adhesive layer interposed on at least one surface of both surfaces, and the adhesive layer may be coated with adhesive on one surface or both surfaces of the substrate.

In addition, the magnetic field shielding sheet may further include a release film attached to at least one side of both surfaces via an adhesive layer.

On the other hand, the present invention is at least one antenna for receiving wireless power; And a magnetic field shielding sheet disposed on one surface of the antenna for receiving wireless power and shielding the magnetic field and focusing the magnetic field in a desired direction.

In addition, the present invention provides a portable terminal device including the above-described wireless power receiving device.

According to the present invention, a straight slit causing cracks in the inner region of the shielding sheet during the punching process is formed, so that a shielding sheet separated into a plurality of pieces can be manufactured without additional processing. Through this, the present invention can reduce the production cost by simplifying the manufacturing process.

In addition, the present invention can manufacture a shielding sheet having various magnetic permeability by adjusting the number and the total number of pieces separated from each other by adjusting the number of straight slits formed in the inner region of the shielding sheet. Through this, the present invention can be manufactured to have a permeability suitable for the use of the shielding sheet.

1 is a flow chart showing a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention,
Figure 2 is a schematic view showing a punching process in the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention,
Figure 3 is a cross-sectional view showing a magnetic sheet that can be used in a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention, (a) is a magnetic sheet is a multi-layer ribbon sheet, (b) is a magnetic sheet Drawing showing the case of a single-layer ribbon sheet,
4 is a view conceptually showing a straight slit and cracks induced therefrom in a magnetic field shielding sheet manufactured through a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention;
5 is a cross-sectional view showing a case where the magnetic field shielding sheet manufactured through the method of manufacturing the magnetic field shielding sheet according to an embodiment of the present invention is made of a multilayer ribbon sheet,
Figure 6 is a plan view showing a mold that can be used in a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention, a view showing the shape of various straight blades,
7 is a view conceptually showing a straight slit formed through the mold of FIG. 6 and cracks caused therefrom;
8 is a cross-sectional view showing a case in which a magnetic field shielding sheet manufactured through a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention is made of a single-layer ribbon sheet,
9 is a view showing a wireless power receiving module according to an embodiment of the present invention, and
FIG. 10 is a cross-sectional view of FIG. 9.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. In the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and the same reference numerals are added to the same or similar elements throughout the specification.

A method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention includes preparing a magnetic sheet (A) having a predetermined area as shown in FIG. 1 (S1) and shielding sheet from the magnetic sheet (A) 100) is cut into a predetermined size and punched to commercialize (S2).

The step of preparing the magnetic sheet (A) may be a step before the production of the shielding sheet 100 to be a final product by cutting to a predetermined size according to the application.

That is, the magnetic sheet (A) may have a predetermined area so that a plurality of shielding sheets (100) having a suitable size for use and use can be separated from the magnetic sheet (A).

The magnetic sheet A may be made of a magnetic material so that the shielding sheet 100 punched out from the magnetic sheet A shields magnetic fields generated from various antennas and focuses them in a desired direction.

Here, the antenna is a combination of two or more of a wireless power transmission (WPT) antenna for wireless charging, a magnetic secure transmission (MST) antenna for magnetic payment, and a near field communication (NFC) antenna for near field communication. It can be composed of older brothers.

The magnetic sheet A may be provided as a sheet-like sheet having a predetermined area. In one example, the magnetic sheet (A) may be a sheet-like sheet having a first area.

At this time, the magnetic sheet (A) may be an adhesive layer 122 is formed on at least one of the upper surface and the lower surface, the adhesive layer 122 may be an adhesive applied to one or both sides of the substrate.

Through this, even though the shielding sheet 100 separated from the magnetic sheet A in the punching process described later is formed separately into a plurality of pieces P, the pieces P are not separated through the adhesive layer 122. Without being separated. Accordingly, the shielding sheet 100 may maintain a plate-like sheet shape.

In addition, the adhesive constituting the adhesive layer 122 may serve to insulate all or part of the neighboring fragments P in whole or in part by penetrating some or all of the gaps between the fragments P. In this case, the adhesive may include a non-conductive component to insulate adjacent pieces P from each other.

At this time, the adhesive layer 122 formed on at least one of the upper and lower surfaces of the magnetic sheet (A) may be at least one of which is coated with adhesive on both sides of a substrate such as PET or PI. In this case, as shown in FIG. 3, a removable release film 120 may be attached to the exposed surface of the adhesive layer 122.

Through this, the final product, the shielding sheet 100, may be attached to other parts by attaching other parts or attaching the shielding sheet 100 to other parts as the adhesive may be exposed to the outside after the release film 120 is removed in the process of use. You can.

As a non-limiting example, as shown in FIG. 3, a pair of release films 120 may be attached to the upper and lower surfaces of the magnetic sheet A through the adhesive layer 122. In this case, the adhesive layer 122 may be coated with adhesive on both sides of the substrate.

Alternatively, the release film 120 may be attached via the adhesive layer 122 to only one of the upper and lower surfaces of the magnetic sheet (A). In this case, the adhesive layer 122 may be coated with adhesive on both sides of the substrate. At this time, a separate adhesive layer may not be formed on the other surface to which the release film 120 is not attached, or an adhesive layer coated with an adhesive may be formed on only one surface of the substrate.

However, the adhesive layer 122 is not limited thereto, and the adhesive layer 122 may be a liquid or gel adhesive.

On the other hand, the magnetic sheet (A) may be a ribbon sheet comprising at least one or more of the amorphous alloy and the nano-crystalline alloy.

As an example, the magnetic sheet (A) is a plurality of ribbon sheets (111a) comprising at least one of the amorphous alloy and the nano-crystalline alloy as shown in Figure 3 (a) is a medium through the adhesive layer (111b) It may be a multi-layered ribbon sheet 110 laminated in multiple layers. Here, the adhesive layer 111b may include a non-conductive component.

Accordingly, the shielding sheet 100 separated from the magnetic sheet (A) through a punching process to be described later is a plurality of ribbon sheets (111a) are laminated in multiple layers via the adhesive layer (111b) as shown in FIG. It may be composed of a multi-layer ribbon sheet 110.

In this case, the adhesive layer 111b moves toward the two ribbon sheets 111a constituting the shielding sheet 100, and partially or entirely permeates between pieces P adjacent to each other (pieces adjacent to each other) P) can be insulated. In addition, when the magnetic sheet (A) is composed of a multilayer ribbon sheet 110, the above-described adhesive layer 122 and release film 120 may be omitted.

Alternatively, the magnetic sheet (A) may be a single-layer ribbon sheet (111a) comprising at least one of the amorphous alloy and the nano-crystalline alloy as shown in Figure 3 (b).

Accordingly, the shielding sheet 300 ′ separated from the magnetic sheet A through a punching process described below may be composed of a single-layer ribbon sheet 111a as illustrated in FIG. 8.

 In this case, the above-described adhesive layer 122 and the release film 120 may be sequentially provided on at least one of the upper and lower surfaces of the magnetic sheet A.

However, the material of the magnetic sheet (A) is not limited to this, and any material containing a magnetic material can be used. That is, the magnetic sheet (A) may be a magnetic sheet obtained by sintering ferrite or a magnetic sheet obtained by mixing and molding soft magnetic powder and a binder. In addition, the magnetic sheet (A) is also possible to use a composite sheet prepared by mixing a soft magnetic powder and a resin for a binder, and mixing Ni and Fe elements in a predetermined ratio, such as permalloy, or predetermined Fe and Co elements It can be used by mixing in a ratio of.

On the other hand, step (S2) of punching the shielding sheet 100 from the magnetic sheet (A) is a shielding sheet 100 of the second area from one magnetic sheet (A) having a first area through the mold 10 Can be separated.

Here, the second area may be a relatively narrow area than the first area.

Accordingly, a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention can produce a plurality of shielding sheets 100 from one magnetic sheet (A) through a punching process.

At this time, the method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention may be separated into a plurality of pieces while the individual shielding sheet 100 is separated from the magnetic sheet A through a punching process.

That is, step (S2) of punching the shielding sheet 100 from the magnetic sheet (A) is the inner area of the second area defined by the border together with the border of the shielding sheet 100 through the mold 10 At least one straight slit 131 may be simultaneously formed.

To this end, the mold 10, as shown in Figure 2, to form a ring-shaped rim blade 12 and the straight slit 131 for processing the rim of the shielding sheet 100, the rim blade It may include at least one straight blade 14 disposed inside the (12).

Accordingly, when the mold 10 is pressed against the magnetic sheet (A), the shielding sheet 100 separated from the magnetic sheet (A) has a rim side through the rim blade 12 and the magnetic sheet (A). At the same time as being separated from, a straight slit 131 having the same shape as the straight blade 14 may be formed through the straight blade 14 in the inner region.

Here, at least one linear blade 14 for forming the linear slit 131 may have the protruding length equal to the protruding length of the edge blade 12 for processing the edge of the shielding sheet, or the edge blade 12 It may be relatively shorter than the protruding length of.

Further, the straight slit 131 may be formed to penetrate the entire thickness of the magnetic sheet A, or may be formed only on a portion of the entire thickness of the magnetic sheet A.

Accordingly, the shielding sheet 100 separated from the magnetic sheet A may include the straight slit 131 formed along a thickness direction or a height direction inside. In addition, the straight slits 131 may be formed at positions corresponding to the straight blades 14, respectively, and the straight slits 131 may include the straight blades in the inner region of the shielding sheet 100 except for the border. 14) can be formed locally.

Accordingly, the shielding sheet 100 is in direct contact with the rim blade 12 and the straight blade 14 of the mold 10 in the punching process, and the pressing force applied from the rim blade 12 and the straight blade 14 is applied. Through the straight slit 131 and the crack 132 caused by at least one of the rim of the shielding sheet may be formed, the straight slit 131 and the induced crack 132 may be connected to each other.

Due to this, the shielding sheet 100 separated from the magnetic sheet A through the punching process is a plurality of through the straight slit 131 and the crack 132 caused therefrom as shown in FIGS. 4 and 6. It can be separated into pieces (P).

At this time, the plurality of pieces (P) may have different sizes and shapes and may be randomly formed irregularly.

As described above, a method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention can remove the shielding sheet 100 from the magnetic sheet A without the need to perform an additional process to separate and form the shielding sheet 100 into a plurality of pieces. In the process of separation, it is possible to simplify the production process by being separated into a plurality of pieces (P).

Here, when the final product, the shielding sheet 100 includes a release film 120 attached to at least one side through an adhesive layer 122, punching the shielding sheet 100 from the magnetic sheet A (S2) ) May be performed in the state where the adhesive layer 122 and the release film 120 are attached to the magnetic sheet A. In this case, the edge blade 12 may penetrate both the adhesive layer 122 and the release film 120 during the punching process.

Accordingly, the shielding sheet 100 is punched to a predetermined size from the magnetic sheet A, and at the same time, a plurality of pieces through the straight slits 131 by the straight blade 14 and the cracks 132 caused therefrom. Even if separated by a field (P), a plurality of pieces (P) separated from each other can be kept separated from each other through the adhesive layer (122).

Through this, the shielding sheet 100 produced through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention may be formed in a state separated into a plurality of pieces (P). Due to this, the overall resistance of the shielding sheet 100 may be increased, and the loss caused by eddy currents and the Q value may be increased to increase the transmission efficiency of the antenna.

Meanwhile, the mold 10 may be provided with a plurality of linear blades 14 disposed in the inner region of the edge blades 12. In this case, the plurality of straight blades 14 may be spaced apart from each other, and may be arranged not to be connected to each other.

At this time, the plurality of straight blades 14 may be arranged in various ways.

For example, the plurality of straight blades 14 may be arranged radially based on a virtual center point, as shown in FIGS. 6 (a) to 6 (h), and the edge of the edge 12 It may be arranged vertically or parallel to the width direction or the length direction, or may be arranged to be inclined at a predetermined angle with respect to the width direction or the length direction of the edge blade 12. In addition, the plurality of straight blades 14 may be in a form in which two of the above three methods are combined with each other.

Accordingly, the shielding sheet 100 produced through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention is a mold 10 of various types shown in Figure 6 (a) to Figure 6 (h) In the process of being punched through, a plurality of straight slits 131 formed in the same shape as the plurality of straight blades 14 may be included in the inner region of the shielding sheet 100.

In this case, the plurality of straight slits 131 formed in the inner region of the shielding sheet 100 may be formed locally at a distance from each other, and may be formed not to be connected to each other. Accordingly, the shielding sheet 100, as described above, the plurality of straight slits 131, the plurality of straight slits 131 and cracks caused by at least one of the edges of the shielding sheet 100, 132 ) Can be separated into a plurality of pieces.

As a specific example, a plurality of straight slits 131 including at least one of the first slit 131a, the second slit 131b, and the third slit 131c are provided in the inner region of the shielding sheet 100. It may be formed, the plurality of straight slits 131 may be formed in various ways in the inner region of the shielding sheet 100, as shown in Figure 7 (a) to 7 (h) of FIG.

Here, the first slit (131a) may be a straight slit formed in a direction perpendicular to the width or length direction of the shielding sheet 100, the second slit (131b) of the shielding sheet 100 It may be a straight slit formed in a direction parallel to the width direction or the length direction. Further, the third slit 131c may be a straight slit formed to be inclined at a predetermined angle with respect to the width direction or the length direction of the shielding sheet 100.

Through this, the shielding sheet 100 may include a plurality of slits 131 including at least two slits of the first slits 131a, the second slits 131b, and the third slits 131c. In addition, the plurality of slits 131 may be formed to be radially disposed based on a virtual center point.

In addition, the shielding sheet 100 may include a plurality of slits 131 composed of only one of the first slits 131a, second slits 131b, and third slits 131c.

On the other hand, the mold 10 may be appropriately changed in the number of straight blades 14 arranged in the inner region of the edge blade 12. Through this, the shielding sheet 100 separated from the magnetic sheet A during the punching process may be changed in the total number of straight slits 131 formed in the inner region through the straight blade 14.

Due to this, the shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention is formed of the pieces P separated through the straight slits 131 and the induced cracks 132. Size and number can be adjusted appropriately.

That is, as the total number of the linear blades 14 provided in the mold 10 increases, the total number of pieces P constituting the shielding sheet 100 increases while the number of pieces P of each piece P increases. The size can be reduced.

Conversely, as the total number of straight blades 14 provided in the mold 10 decreases, the total number of pieces P constituting the shielding sheet 100 decreases, while the total number of pieces P decreases. The size can be large.

Through this, the shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention is the shielding sheet 100 according to the total number of straight blades 14 provided in the mold 10 ) Can be adjusted in size and number of pieces (P) constituting the. For this reason, the shielding sheet 100 manufactured through the manufacturing method of the magnetic field shielding sheet according to an embodiment of the present invention can variously change the permeability of the shielding sheet 100 even if the same manufacturing method is used.

On the other hand, through the above-described manufacturing method, the shielding sheet 100 formed separately from the plurality of pieces P may have a gap between the pieces P. Moreover, when the shielding sheet 100 is separated into a plurality of pieces P through the straight slit 131 formed by the straight blade 14 and the crack 132 caused therefrom, the shielding sheet 100 The surface of the sheet may be uneven. In order to solve this, a separate laminate process may be additionally performed.

That is, a portion of the adhesive layer permeates the gap between the pieces P by pressing the shielding sheet 100 separated into a plurality of pieces P through a lamination process, and the adhesive layer fills the gap and the shielding sheet at the same time. The 100 can be flattened, slimmed and stabilized.

As a result, the adhesive impregnated into the gaps of the pieces P can surround the pieces P, thereby completely or partially insulating the neighboring pieces P with each other to further reduce losses due to eddy currents. It might be.

The magnetic field shielding sheet 100 manufactured through the above-described method of manufacturing a magnetic field shielding sheet according to an embodiment of the present invention may be implemented in the form of FIGS. 5 and 8.

That is, the magnetic field shielding sheet 100 may be formed separately into a plurality of pieces (P), the plurality of pieces (P) includes at least some of the pieces (P) having different sizes and shapes can do.

In this case, the magnetic field shielding sheet 100 includes at least one linear slit 131 in which the plurality of pieces P are formed along the thickness direction of the magnetic field shielding sheet 100, the linear slit 131, and a magnetic field. It may be formed through a crack 132 derived from the rim of the shielding sheet 100.

In addition, the magnetic field shielding sheet 100 may be interposed with an adhesive layer 122 on at least one of the upper surface and the lower surface, and the adhesive layer 122 may be coated with adhesive on one or both surfaces of the substrate.

In addition, the magnetic field shielding sheet 100 may include a release film 120 attached to at least one surface of an upper surface and a lower surface via an adhesive layer 122, wherein the magnetic field shielding sheet 100 includes an amorphous alloy and A ribbon sheet including at least one or more of the nanocrystalline alloys may be formed as a single layer or may be composed of multiple layers through an adhesive layer.

The detailed description of the detailed configuration of the magnetic field shielding sheet 100 is the same as that mentioned in the above-described manufacturing process, and thus detailed description will be omitted.

The magnetic field shielding sheet 100 manufactured through the method of manufacturing the magnetic field shielding sheet according to the above-described exemplary embodiment may be implemented as a wireless power receiving apparatus 1000 for wireless power transmission.

That is, the wireless power receiving apparatus 1000, as shown in Figures 9 and 10, at least one wireless power receiving antenna 211 for wireless charging, and one surface of the wireless power receiving antenna 211 The magnetic field shielding sheet 100 may be disposed to shield the magnetic field and focus the magnetic field in a desired direction.

Here, the wireless power receiving antenna 211 may be an antenna pattern patterned on at least one surface of the circuit board 210, but is not limited thereto, and may also be a flat coil having a conductive member wound multiple times.

In addition, the magnetic field shielding sheet 100 constituting the wireless power receiver 1000 may be a magnetic field shielding sheet manufactured through the above-described manufacturing method. In this case, the magnetic field shielding sheet 100 may have a form in which the release film 120 attached to the one side via the adhesive layer 122 is removed, and the antenna pattern or circuit board 210 is attached to the adhesive layer 122. ) May be directly attached.

The wireless power receiving apparatus 1000 may include an antenna having only the wireless power receiving antenna 211, but may further include various antennas performing different functions.

For example, the wireless power receiver 1000 may further include at least one of an MST antenna 212 for magnetic payment and an NFC antenna 213 for short-range communication in addition to the antenna 211 for wireless power reception. .

In addition, the wireless power receiver 1000 may be applied to portable terminal devices such as mobile phones and tablet PCs.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art to understand the spirit of the present invention may add elements within the scope of the same spirit. However, other embodiments may be easily proposed by changing, deleting, adding, or the like, but it will also be considered to be within the scope of the present invention.

100: magnetic field shielding sheet 110: ribbon sheet
120: release film 122: adhesive layer
131,131a, 131b, 131c: straight slit 132: crack
1000: wireless power receiving module

Claims (17)

In the manufacturing method of the magnetic field shielding sheet formed separately into a plurality of pieces,
Preparing a magnetic sheet made of a magnetic material and having a first area; And
Including the step of punching the shielding sheet from the magnetic sheet using a mold so that the shielding sheet having a second area relatively narrower than the first area can be separated from the magnetic sheet;
Step of punching the shielding sheet from the magnetic sheet is at least one straight slit in the inner area of the second area through the mold so that the shielding sheet can be separated into a plurality of pieces while being separated from the magnetic sheet by a second area. Method of manufacturing a magnetic field shielding sheet to form a. According to claim 1,
The mold manufacturing method of a magnetic field shielding sheet comprising a ring-shaped rim blade for processing the rim of the shielding sheet and at least one straight blade for forming the linear slit. According to claim 1,
The linear slit has a predetermined length and is formed along the thickness direction of the shielding sheet, and the shielding sheet shields a magnetic field separated into a plurality of pieces through cracks caused by at least one of the straight slit and the rim of the shielding sheet Sheet manufacturing method. According to claim 1,
The shielding sheet includes a plurality of straight slits formed locally in the inner region,
The plurality of straight slit is a method of manufacturing a magnetic field shielding sheet formed radially based on the virtual center point. According to claim 1,
The shielding sheet includes a plurality of straight slits formed locally at a distance from each other in the inner region,
The plurality of linear slits include a first slit formed in a direction perpendicular to the width direction or a length direction of the shield sheet, a second slit formed in a direction parallel to the width direction or the length direction of the shield sheet, and the shield Method of manufacturing a magnetic field shielding sheet comprising at least one of the third slits formed to be inclined at a predetermined angle with respect to the width direction or the longitudinal direction of the sheet. According to claim 1,
The shielding sheet includes a plurality of straight slits formed locally at a distance from each other in the inner region,
The plurality of straight slit is a method of manufacturing a magnetic field shielding sheet is formed so as not to be directly connected to each other. According to claim 2,
The at least one of the upper and lower surfaces of the magnetic sheet includes a release film attached through an adhesive layer coated with adhesive on both sides of the substrate, and the step of punching the shielding sheet from the magnetic sheet includes the edge of the edge. Method for manufacturing a magnetic field shielding sheet is performed to penetrate both the magnetic sheet and the release film. According to claim 1,
The magnetic sheet is a single-layer ribbon sheet comprising at least one of an amorphous alloy and a nanocrystalline alloy, or a multi-layered ribbon in which a ribbon sheet comprising at least one of an amorphous alloy and a nanocrystalline alloy is laminated through an adhesive layer. Method of manufacturing a sheet-in magnetic field shielding sheet. A shielding sheet made of a magnetic material is a magnetic field shielding sheet formed of a plurality of pieces,
The plurality of pieces include pieces having at least some of different sizes and shapes,
The pieces are magnetic field shielding sheets that are pieces separated from each other through at least one straight slit formed along the thickness direction of the shielding sheet, and cracks derived from at least one of the straight slit and the rim of the shielding sheet. The method of claim 9,
The straight slit includes a plurality of straight slits formed locally in the inner region of the shielding sheet,
The plurality of linear slits are magnetic field shielding sheets formed radially based on a virtual center point. The method of claim 9,
The straight slits include a plurality of straight slits formed locally at a distance from each other in the inner region of the shielding sheet,
The plurality of straight slits are inclined at a certain angle with respect to the first slit formed in a direction perpendicular to the width direction or the longitudinal direction, the second slit formed in a direction parallel to the width direction or the length direction, and the width slit. Magnetic field shielding sheet comprising at least one of the third slit is formed. The method of claim 9,
The straight slits include a plurality of straight slits formed locally at a distance from each other in the inner region of the shielding sheet,
The magnetic field shielding sheet is formed so that the plurality of straight slits are not directly connected to each other. The method of claim 9,
The magnetic field shielding sheet further includes an adhesive layer interposed on at least one surface of both surfaces, and the adhesive layer is a magnetic field shielding sheet in which adhesive is applied to one or both surfaces of a substrate. The method of claim 9,
The magnetic field shielding sheet is a magnetic field shielding sheet further comprising a release film attached to at least one of the two sides by an adhesive layer. The method of claim 9,
The magnetic field shielding sheet is a single-layer ribbon sheet comprising at least one or more of an amorphous alloy and a nanocrystalline alloy, or a multi-layered ribbon sheet comprising at least one or more of an amorphous alloy and a nano-crystalline alloy through an adhesive layer. Magnetic sheet shielding sheet, which is a ribbon sheet. At least one antenna for receiving wireless power; And
Includes a magnetic field shielding sheet disposed on one surface of the antenna for receiving the wireless power and shields the magnetic field and focuses the magnetic field in a desired direction.
The magnetic field shielding sheet,
The shielding sheet made of magnetic material is separated into a number of pieces,
The plurality of pieces include pieces having at least some of different sizes and shapes,
The pieces are at least one straight slit formed along the thickness direction of the shielding sheet, and a piece of wire separated from each other through a crack derived from at least one of the straight slit and the rim of the shielding sheet. A portable terminal device comprising the wireless power receiving device according to claim 16.

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