Magnetic field shielding gasket and method for manufacturing the same

Abstract

The present invention provides a magnetic field shielding gasket and a manufacturing method thereof. The magnetic field shielding gasket of one embodiment of the present invention is configured on one side of an antenna, the antenna includes a hollow portion with a predetermined area in the center and a pattern portion surrounding the hollow portion, the magnetic field shielding gasket may include: a gasket body, which is made of magnetic material to shield the magnetic field; and at least one eddy current reducing pattern portion, which is formed on the gasket body to increase the resistance of the gasket body and reduce the generation of eddy current.

Description

Technical Field

[0001] The invention relates to a magnetic field shielding gasket and a manufacturing method thereof. Background Art

[0002] Near Field Communication (NFC) and wireless charging are essentially contactless transmission methods, which are implemented by an antenna that transmits or receives a magnetic field and a magnetic field shielding gasket that is arranged on one side of the antenna and can smoothly transmit or receive the magnetic field.

[0003] Generally, a spacer made of a magnetic material, such as an amorphous ribbon sheet, a ferrite sheet, or a polymer sheet, is used as a magnetic field shielding spacer.

[0004] On the other hand, in order to significantly reduce the loss caused by eddy current or improve the flexibility of the gasket itself, the magnetic field shielding gasket is making full use of the gasket divided into multiple pieces.

[0005] For example, the magnetic field shielding gasket can be divided into multiple pieces through a fragmentation process. That is, the fragmentation process is to pass the magnetic field shielding gasket multiple times between a metal roller with multiple concave and convex or spherical balls formed on the outside and a rubber roller arranged opposite to the metal roller, thereby dividing the magnetic field shielding gasket into multiple fragments.

[0006] Accordingly, in order to manufacture the magnetic field shielding gasket divided into a plurality of pieces, a separate fragmentation process for dividing the shielding gasket into a plurality of pieces is added, and thus there is a problem of increasing production cost.

[0007] In addition, conventional magnetic field shielding gaskets that are divided into multiple pieces through a fragmentation process require the fragmentation process to be performed multiple times to achieve a shielding gasket that exhibits uniform characteristics.

[0008] However, the more the fragmentation process is repeated, the smaller the size of the blocks separated from each other becomes, and the total number of divided blocks increases. Therefore, the more the fragmentation process is repeated, the greater the resistance of the shielding gasket increases, which can reduce the impact of eddy currents. However, there is a problem that the magnetic permeability of the shielding gasket decreases to below 1500.

[0009] Therefore, in order to realize a magnetic field shielding gasket having a high magnetic permeability of more than 2000 while increasing the resistance of the shielding gasket itself, there is a problem that the overall thickness of the magnetic field shielding gasket needs to be increased. Summary of the invention

[0010] (Problem to be solved)

[0011] The present invention is proposed in consideration of the above-mentioned problems, and aims to provide a magnetic field shielding gasket and a method for manufacturing the same, in which an eddy current reduction pattern portion is locally formed in an area corresponding to an antenna in the total area, thereby forming a very thin thickness while also achieving a high magnetic permeability of more than 2000.

[0012] In addition, another object of the present invention is to provide a magnetic field shielding gasket and a method for manufacturing the same, which can selectively form an eddy current reduction pattern locally in an area corresponding to the antenna in the total area even without performing a separate fragmentation process, and can prevent burrs or particles from being generated during the formation of the eddy current reduction pattern.

[0013] (Methods of solving the problem)

[0014] In order to achieve the above-mentioned purpose, a magnetic field shielding gasket is provided, which is arranged on one side of an antenna. The antenna includes a hollow portion with a predetermined area in the center and a pattern portion surrounding the hollow portion. The magnetic field shielding gasket includes: a gasket body, which is made of magnetic material to shield the magnetic field; and at least one eddy current reducing pattern portion, which is formed on the gasket body to increase the resistance of the gasket body, thereby reducing the generation of eddy current.

[0015] In addition, the eddy current reducing pattern portion may be a portion divided into a plurality of pieces by a plurality of cracks at a position corresponding to a region where the pattern portion is arranged in the gasket body.

[0016] In addition, the gasket body may not be divided into a plurality of parts except for the eddy current reducing pattern portion.

[0017] In addition, the eddy current reducing pattern portion may be a portion in which a linear area having a predetermined width and length in the gasket body is divided into a plurality of pieces by a plurality of cracks.

[0018] In addition, the gasket body may include a plurality of cracks extending from a frame defining the eddy current reducing pattern portion.

[0019] In addition, the eddy current reducing pattern portion may include: a plurality of regular cracks formed in a predetermined shape; and a plurality of irregular cracks derived from the plurality of regular cracks.

[0020] In addition, the regular cracks may be formed to have any one of the cross-sectional shapes of “−”, “+”, “×”, “*”, “⊥”, and “·”.

[0021] In addition, the eddy current reduction pattern portion may be a through portion that penetrates the gasket body in a linear shape having a predetermined width and length.

[0022] In addition, the eddy current reduction pattern portion includes a plurality of the through portions, and the plurality of through portions are arranged in a linear shape along one direction to form a dotted line shape, and may be arranged at a predetermined interval from each other.

[0023] In addition, the eddy current reducing pattern portion may include a plurality of cracks extending from the through portion.

[0024] In addition, a plurality of the eddy current reducing pattern portions may be formed in a region corresponding to the pattern portion, and the plurality of eddy current reducing pattern portions may be arranged radially.

[0025] In addition, the magnetic field shielding gasket is used as a magnetic field shielding gasket for a combined antenna unit, and the combined antenna unit is a wireless power transmission antenna and a wireless communication antenna formed with a pattern on at least one side of a circuit board, so that the wireless communication antenna surrounds the wireless power transmission antenna, wherein the eddy current reduction pattern portion is not formed in the area corresponding to the wireless communication antenna in the total area of ​​the gasket body, but is located in the area corresponding to the wireless power transmission antenna.

[0026] On the other hand, the present invention provides a method for manufacturing a magnetic field shielding gasket, which is arranged on one side of an antenna, and the antenna includes a hollow portion with a predetermined area in the center and a pattern portion surrounding the hollow portion. The method for manufacturing the magnetic field shielding gasket includes: a first step of preparing a plate-shaped magnetic gasket, which is made of magnetic material and has a first area; and a second step of applying pressure to the local area in order to divide the magnetic gasket into a shielding gasket with a second area relatively smaller than the first area while dividing the local area in the inner area of ​​the shielding gasket into multiple pieces.

[0027] In addition, the second step can be performed by a mold, which includes a cutting blade and at least one pressurizing component, wherein the cutting blade is used to process the frame of the shielding gasket, and the at least one pressurizing component is arranged on the inner side of the cutting blade and is used to pressurize the local area of ​​the magnetic gasket.

[0028] In addition, the pressurizing member may have a shape corresponding to the regular cracks to form the plurality of regular cracks formed in a predetermined shape on the gasket body.

[0029] On the other hand, the present invention provides a method for manufacturing a magnetic field shielding gasket, which is arranged on one side of an antenna, and the antenna includes a hollow portion with a predetermined area in the center and a pattern portion surrounding the hollow portion. The method for manufacturing the magnetic field shielding gasket includes: a first step of preparing a magnetic gasket, which is made of magnetic material and has a plate shape with a first area; a step of punching the gasket body for the first time to form a through portion with a predetermined width and length in the inner area of ​​the gasket body and form multiple cracks extending from the through portion; and a step of punching the gasket body for the second time to form a shielding gasket, which includes the through portion and has a second area relatively smaller than the first area.

[0030] In addition, the first stamping step can be performed by a mold, which includes a border blade and a separation component, wherein the border blade is a ring shape for forming a border of the through-portion, and the separation component is formed in the inner area of ​​the border blade to pressurize and separate the cut piece cut from the gasket body by the border blade.

[0031] In addition, the step of punching the gasket body for the second time may include forming an outer frame defining the second area on the gasket body to separate the shielding gasket from the gasket body.

[0032] (Effects of the Invention)

[0033] According to the present invention, the overall resistance is increased by the eddy current reducing pattern portion to reduce the generation of eddy current, and a high magnetic permeability of more than 2000 can be achieved while having a very thin thickness.

[0034] In addition, even without performing a separate fragmentation process, the present invention can selectively form an eddy current reduction pattern locally in the area corresponding to the antenna in the total area. In the process of forming the eddy current reduction pattern, burrs or particles can be prevented from being generated, thereby improving production yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a diagram showing a magnetic field shielding gasket according to an embodiment of the present invention;

[0036] Figure 2 As will Figure 1 A diagram showing an enlarged portion of the eddy current reduction pattern portion is a diagram conceptually showing a specific structure of the crack portion;

[0037] Figure 3 It is a schematic diagram showing a case where a magnetic field shielding gasket applicable to the present invention is composed of multiple layers of amorphous alloy or nanocrystalline alloy;

[0038] Figure 4is an enlarged view showing regular cracks and irregular cracks in a crack portion;

[0039] Figure 5 It is a conceptual illustration Figure 1 A diagram showing a specific structure of a through portion in an eddy current reduction pattern portion;

[0040] Figure 6 is a diagram conceptually showing a through portion formed in a dotted line form;

[0041] Figure 7 is a diagram conceptually showing the movement of a portion of the gasket body that contacts the protruding portion when the through portion is formed;

[0042] Figure 8 is a diagram showing that an eddy current reduction pattern portion is formed in a region corresponding to a pattern portion of an antenna;

[0043] Fig. 9 It is conceptually shown in Figure 8 A diagram showing various forms of eddy current reduction pattern portions that can be formed in an area corresponding to a pattern portion of an antenna and cracks formed thereby;

[0044] Fig.10 is a diagram showing that an eddy current reduction pattern portion is formed in a region corresponding to a hollow portion of an antenna;

[0045] Fig.11 It is conceptually shown in Fig.10 Figure 3 shows various forms of eddy current reduction pattern portions that can be formed in a region corresponding to a hollow portion of an antenna and cracks formed thereby;

[0046] Fig.12 is a plan view of a wireless power transmission module according to an embodiment of the present invention;

[0047] Fig.13 is a flow chart showing a method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention;

[0048] Fig.14 is a diagram schematically showing a mold that can be used to manufacture a magnetic field shielding gasket according to an embodiment of the present invention;

[0049] Fig.15 is a diagram schematically showing a process of using a crack cutting blade in a method of manufacturing a magnetic field shielding gasket according to an embodiment of the present invention;

[0050] Fig.16 It is a figure which shows various forms of the crack insert applicable to the present invention;

[0051] Fig.17 is a flow chart showing a method for manufacturing a magnetic field shielding gasket according to another embodiment of the present invention;

[0052] Fig.18 is a diagram conceptually showing one form of a die that can be used in a first punching step in a method for manufacturing a magnetic field shielding gasket according to another embodiment of the present invention;

[0053] Fig.19 and Fig. 20 It is shown that it can be applied to Fig.18 A plan view of the mold;

[0054] Fig.21 It is shown that it can be applied to Fig. 20 A plan view of another form of the upper die for the first punching;

[0055] Fig. 22 is a plan view showing one form of a die applicable to a second punching step in a method for manufacturing a magnetic field shielding gasket according to another embodiment of the present invention;

[0056] Fig.23 It shows the use of Fig.19 and Fig. 20 A plan view of a multiple gasket in a state where the die has completed the first punching; Fig.24 It shows the use of Fig. 22 The die shown completes the second punch Fig.23 A plan view of a multi-layer gasket showing a state of the multi-layer gasket;

[0057] Fig.25 It is intercepted Fig.24 Cross-sectional view of the AA portion. DETAILED DESCRIPTION

[0058] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that a person having ordinary knowledge in the technical field to which the present invention belongs can easily implement the present invention. The present invention can be implemented in various forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted in the accompanying drawings, and the same reference numerals are given to the same or similar components throughout the specification.

[0059] like Figure 1 As shown, a magnetic field shielding gasket 100 according to an embodiment of the present invention includes a gasket body 110 and an eddy current reducing pattern portion 120 .

[0060] The gasket body 110 may be made of a magnetic material, and thus may shield the magnetic field generated by the antenna unit 200 .

[0061] Here, the antenna unit 200 may include at least one antenna 220, 230, and the at least one antenna 220, 230 includes: a hollow portion having a predetermined area in the center, and a pattern portion formed by surrounding the hollow portion with a predetermined number of turns. In such a case, the at least one antenna 220, 230 may also be a flat coil in which a conductive member having a predetermined wire diameter is wound multiple times, or may be a Fig.12 The antenna pattern is shown formed on one side of the circuit board 210.

[0062] In addition, the at least one antenna 220, 230 may be a wireless power transmission antenna 220 for transmitting or receiving wireless power, or may be an MST antenna for magnetic payment, or an NFC antenna 230 for short-range communication. Furthermore, the antenna unit 200 may also be configured as a combination of two or more of the wireless power transmission antenna 220, MST antenna, and NFC antenna 230.

[0063] At this time, the gasket body 110 may be formed of a material including a metal component.

[0064] For example, the gasket body 110 may be a belt gasket including at least one of an amorphous alloy and a nanocrystalline alloy. However, the material of the gasket body 110 is not limited thereto, but any known material used for magnetic field shielding gaskets may be used, such as ferrite, polymer, permalloy, etc.

[0065] In one embodiment of the present invention, the gasket body 110 may also be formed by a single-layer belt gasket 111a. Figure 3 As shown, it can be a multi-layer gasket in which a plurality of belt gaskets 111a are stacked into multiple layers through a first adhesive layer 111b, or it can be a hybrid gasket in which a belt gasket of an amorphous alloy and a belt gasket of a nanocrystalline alloy are combined.

[0066] At this time, each tape gasket 111 a constituting the gasket body 110 may be a heat-treated tape gasket, and a protective film 113 may be attached to at least one of the upper and lower surfaces of the gasket body 110 via the second adhesive layer 112 .

[0067] Preferably, the protective film 113 may be respectively attached to the upper surface and the lower surface of the gasket body 110. At this time, the protective film 113 attached to the gasket body 110 may be a removable release film.

[0068] The magnetic field shielding gasket 100 according to an embodiment of the present invention may include an eddy current reducing pattern portion 120 formed inside the gasket body 110 .

[0069] The eddy current reducing pattern portion 120 increases the overall resistance of the gasket body 110, thereby reducing the generation of eddy current. Accordingly, the antenna unit 200 can reduce the influence of eddy current through the eddy current reducing pattern portion 120, thereby reducing the influence of eddy current on at least one antenna 220, 230.

[0070] For example, the eddy current reduction pattern portion 120 may be a portion that is physically deformed to form a crack portion 130 or a through portion 140 on a portion of the gasket body 110 in order to reduce the generation of eddy current. Various forms may be achieved depending on the type and configuration of the crack portion 130 or the through portion 140 .

[0071] First, in one embodiment of the present invention, among various forms of the eddy current reducing pattern portion 120 , a description will be given of a case where the eddy current reducing pattern portion 120 is formed by the crack portion 130 .

[0072] like Figure 2 As shown, the eddy current reduction pattern portion 120 may be a portion of the gasket body 110 that is divided into multiple pieces by a plurality of cracks 131 for an area having a predetermined width and length, i.e., a crack portion 130. In such a case, the gasket body 110 may not be divided into multiple pieces in the total area except for the portion divided into multiple pieces.

[0073] Here, the crack 131 included in the crack portion 130 may be a single-layer structure that physically cuts the gasket body 110 so that the gasket body 110 is divided into a plurality of pieces. The gasket body 110 may be a single-layer structure that is physically cut into the gasket body 110 so that the gasket body 110 is divided into a plurality of pieces. Fig.14 The pressurizing member 14 and the like shown are split by receiving pressure.

[0074] At this time, the multiple pieces separated by the crack 131 can maintain a state of being disconnected and in contact with each other (refer to Figure 3 (A) part), or a small space may be formed between the plurality of blocks (refer to Figure 3 The small space formed in this way looks similar to the through-portion 140 to be described later in that it forms a space between the gasket bodies 110, but can be distinguished from the through-portion 140 in that the width is very small.

[0075] As a non-limiting example of a crack portion 130 including a crack 131, Figure 2 As shown, the area where the crack portion 130 is formed may be formed in a line shape having a predetermined width and length.

[0076] At this time, the linear crack portion 130 can be formed by applying pressure to one surface of the gasket body 110 by a pressure member 14, etc., and the pressure member 14 is formed so that the end contacting the gasket body 110 corresponds to the linear area. Accordingly, a plurality of cracks 131 can be formed in the gasket body 110 for a linear area having a predetermined width and length, and the gasket body 110 can be divided into a plurality of pieces.

[0077] Then, the crack 131 is not formed only in the linear area in the gasket body 110 , but a plurality of cracks 132 may be formed extending from the frame of the predetermined crack portion 130 .

[0078] That is, in order to form the crack 131 for the linear area in the gasket body 110 , the crack 132 extending outward from the frame of the predetermined crack portion 130 may be formed simultaneously during the process of pressurizing the gasket body 110 by the pressurizing member 14 .

[0079] On the other hand, as another example of the crack portion 130 including the cracks 131 , the crack portion 130 may include a plurality of regular cracks 133 formed in a predetermined shape and a plurality of irregular cracks 134 derived from the plurality of regular cracks 133 .

[0080] More specifically, if Fig.16 As shown, when the gasket body 110 is pressed by the crack blade 16 formed in a predetermined shape, a regular crack 133 having a shape corresponding to the crack blade 16 can be formed in the gasket body 110. At this time, not only the regular crack 133 but also an irregular crack 134 are generated, and a plurality of cracks 133 and 134 can be formed for the entire predetermined area adjacent to the crack blade 16.

[0081] The crack part 130 in which a predetermined area included in the gasket body 110 is divided into a plurality of pieces may be formed by the regular cracks 133 and the irregular cracks 134 as described above.

[0082] At this time, as an exemplary example, the regular crack 133 may have a cross-sectional shape such as “-”, “+”, “×”, “*”, “⊥” or “·” (refer to Fig.16 ), the related description will be described in more detail through the related description of the manufacturing method of the magnetic field shielding gasket of one embodiment of the present invention.

[0083] Thus, the magnetic field shielding gasket 100 according to an embodiment of the present invention forms cracks (131 to 134) of various shapes in the local area of ​​the gasket body 110, thereby increasing the overall resistance of the gasket body 110 and reducing the generation of eddy currents, thereby reducing the impact of eddy currents.

[0084] Next, among various forms of the eddy current reducing pattern portion 120 , a case where the eddy current reducing pattern portion 120 is formed by the through portion 140 in addition to the above-mentioned crack portion 130 will be described.

[0085] The magnetic field shielding gasket 100 of one embodiment of the present invention is used as the eddy current reducing pattern portion 120, such as Figure 5 As shown, the gasket body 110 may include a through portion 140 formed in the inner region of the gasket body 110 and a plurality of cracks 141 extending from the through portion 140 .

[0086] For example, the through portion 140 may be formed to penetrate the gasket body 110, and the plurality of cracks 141 may be formed to extend from the through portion 140 to the inner side of the gasket body 110. At this time, the plurality of cracks 141 may be generated from the through portion 140 by an external force applied to the gasket body 110 during the process in which the through portion 140 is formed in the gasket body 110.

[0087] Here, the plurality of cracks 141 are different from the above-mentioned cracks ( 131 to 134 ) only in that they are generated during the process of forming the through portion 140 , and the structure may be similar in that the gasket body 110 is physically cut.

[0088] In the above case, the plurality of cracks 141 formed from the through-portion 140 may or may not be connected to each other. In addition, only a part of the plurality of cracks 141 may be connected to each other.

[0089] Accordingly, the magnetic field shielding gasket 100 of one embodiment of the present invention can increase the overall resistance by forming the through-portion 140 and the plurality of cracks 141 in the gasket body 110, thereby reducing the influence of eddy current. That is, the through-portion 140 and the plurality of cracks 141 formed in the gasket body 110 can function as an eddy current reducing tool that can reduce eddy current.

[0090] At this time, the through portion 140 may be formed to have a predetermined width and length, and may be formed in an appropriate number of more than one. In addition, the through portion 140 may also be formed to have a length greater than the width. Furthermore, the total number of the plurality of cracks 141 may be relatively greater than the total number of the through portions 140.

[0091] As a non-limiting example of the through portion 140, Figure 5 As shown, the through portion 140 may be formed in a linear shape having a length greater than a width.

[0092] As another example, Figure 6As shown, the through-portions 140 are arranged in a linear shape along one direction so that the through-portions 140 form a dotted line shape as a whole, and can also be arranged at a predetermined interval. In this way, the through-portions 140 form a dotted line in order to minimize the length of the protrusion 18 that penetrates the gasket body 110 in the longitudinal direction.

[0093] In more detail, Fig.19 As shown, in the case where the through portion 140 is formed by the linear protrusion 18 extending in the length direction, as shown in FIG. Figure 7 As shown, in the process of the protrusion 18 returning to its original position after penetrating the gasket body 110 , a part of the gasket body arranged on both sides of the protrusion 18 also moves in the same direction as the protrusion 18 due to the adhesive force between the protrusion 18 and the gasket body 110 .

[0094] At this time, the activities of the parts of the gasket body arranged on both sides of the protrusion 18 can be asymmetrical with each other. The longer the length of the protrusion 18 is, the larger the range of activities of the parts of the gasket body arranged on both sides of the protrusion 18 will be, and the asymmetry of the parts of the gasket body on both sides of the protrusion 18 can also be increased accordingly.

[0095] Such asymmetry not only reduces the function of the eddy current reduction pattern portion 120 itself, but also causes a problem of electrical short circuit, thus requiring a separate planarization process, which may functionally serve as a process disadvantage.

[0096] As described above, the magnetic field shielding gasket 100 according to an embodiment of the present invention minimizes the length of the protrusion 18 in the longitudinal direction and forms the through portion 140 in the form of a dotted line, thereby effectively solving the problem caused by the asymmetry of the gasket body 110 .

[0097] In one embodiment of the present invention, as described above, the gasket body 110 may include a protective film 113 , and the protective film 113 is attached to at least one side of the gasket body 110 through an adhesive layer 112 .

[0098] At this time, the protective film 113 may be attached to the gasket body 110 so as to cover the divided portion 120. Accordingly, even if the gasket body 110 includes the divided portion, i.e., the current reducing pattern portion 120, the broken pieces constituting the eddy current reducing pattern portion 120 may be prevented from being separated, and the gasket body 110 may maintain a plate shape through the protective film 113.

[0099] In addition, when the eddy current reduction pattern portion 120 is formed by including the through portion 140, the gasket body 110 and the protective film 113 can be formed through. This will be described in more detail in the following description of a method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention.

[0100] The magnetic field shielding gasket 100 of one embodiment of the present invention can form one or more appropriate number of eddy current reducing pattern portions 120 on a portion of the total area of ​​the gasket body 110 , and can be partially formed on a portion of the total area of ​​the gasket body 110 .

[0101] Accordingly, a magnetic field shielding gasket 100 according to an embodiment of the present invention partially forms an eddy current reducing pattern portion 120 in a portion of the area corresponding to the area where the antennas 220 and 230 are configured to increase the overall resistance of the gasket itself, thereby minimizing the impact of eddy currents while having a high magnetic permeability of more than 2000 at a very thin thickness.

[0102] For example, the magnetic field shielding gasket 100 according to an embodiment of the present invention may have a high magnetic permeability of more than 2000 even with a very thin total thickness of 55 μm to 85 μm.

[0103] Therefore, the magnetic field shielding gasket 100 of an embodiment of the present invention can achieve ultra-thinness through a very thin thickness and can also increase the inductance of at least one antenna 220 or 230 .

[0104] like Figure 1 As shown, the eddy current reduction pattern portion 120 as described above can be formed radially with the center point of the inner hollow portion of the antenna 220, 230 as the reference. However, in the magnetic field shielding gasket 100 of an embodiment of the present invention, the configuration of the eddy current reduction pattern portion 120 is not limited thereto, but as long as it is formed at a position corresponding to the antenna 220, 230, it can be as shown in FIG. Fig. 9 and Fig.11 The eddy current reducing pattern portion 120 may be formed in various ways.

[0105] Furthermore, when the antenna unit 200 includes a plurality of antennas, the eddy current reducing pattern portion 120 may be formed in regions corresponding to the plurality of antennas, respectively, or may be formed only in a region corresponding to a portion of the plurality of antennas.

[0106] As a specific example, the eddy current reducing pattern portion 120 may be partially formed on only a portion of the total area of ​​the shielding gasket 300 as a finished product.

[0107] That is, Figure 8As shown, the eddy current reduction pattern portion 120 may be formed in a portion of the total area of ​​the shielding gasket 300 as a finished product, where the pattern portion P of the antenna 211 is configured. The portion of the pattern portion P of the antenna 211 may be the configuration area A1 described above.

[0108] Accordingly, the shielding gasket 300 may form the eddy current reducing pattern portion 120 only on a portion of the total area of ​​the shielding gasket 300 corresponding to the pattern portion P of the antenna 211 .

[0109] In the above case, the eddy current reduction pattern portion 120 formed in a portion of the area corresponding to the pattern portion P of the antenna 211 can be formed in Fig. 9 Various ways of forming are shown.

[0110] As another example, Fig.10 As shown, the eddy current reduction pattern portion 120 can be formed only on a portion of the total area of ​​the shielding gasket 300 as a finished product where the magnetic flux is concentrated. In this way, the portion of the area where the magnetic flux is concentrated can be the corresponding area A2 corresponding to the hollow portion E of the antenna 211.

[0111] Accordingly, the eddy current reducing pattern portion 120 may be formed on only a portion of the total area of ​​the shielding gasket 300 corresponding to the hollow portion E of the antenna 211 .

[0112] In the above case, the eddy current reduction pattern portion 120 formed in a portion of the area corresponding to the hollow portion E of the antenna 211 can be formed in Fig.11 Various ways of forming are shown.

[0113] The magnetic field shielding gasket 100 according to an embodiment of the present invention described above may be implemented as a wireless power transmission module 400 for wireless power transmission.

[0114] For example, Fig.12 As shown, the wireless power transmission module 400 may include an antenna unit 200 and a magnetic field shielding gasket 100, the antenna unit 200 includes a wireless power transmission antenna 220 for wireless power transmission, and the magnetic field shielding gasket 100 is arranged on one side of the antenna unit 200 to shield the magnetic field while concentrating the magnetic field in a desired direction.

[0115] Here, the antenna unit 200 may be a combined antenna unit including, in addition to the wireless power transmission antenna 220, a wireless communication antenna 230 disposed around the outer contour of the wireless power transmission antenna 220. The wireless power transmission antenna 220 and the wireless communication antenna 230 may be antenna patterns formed on one side of the circuit board 210.

[0116] As described above, in the case where the antenna unit 200 is formed as a combined antenna unit, the eddy current reduction pattern portion 120 may be formed only in a region corresponding to a region where the wireless power transmission antenna 220 is arranged in the total area of ​​the gasket body 110. That is, the eddy current reduction pattern portion 120 may not be formed in the combined antenna unit 200 except for a region corresponding to a region where the wireless power transmission antenna 220 is arranged.

[0117] In particular, the eddy current reduction pattern portion 120 may not be formed in a region corresponding to a region where the wireless communication antenna 230 is disposed.

[0118] Accordingly, the magnetic field shielding gasket 100 of one embodiment of the present invention partially forms an eddy current reducing pattern portion 120 in a portion of the area corresponding to the area where the wireless power transmission antenna 220 is configured to increase the overall resistance of the gasket itself, thereby minimizing the impact of eddy currents while having a high magnetic permeability of more than 2000 in a very thin thickness.

[0119] On the other hand, the antenna unit 200 may also include an MST antenna.

[0120] Here, the magnetic field shielding gasket 100 constituting the wireless power transmission module 400 may be the magnetic field shielding gasket 100 described above. The magnetic field shielding gasket 100 is the same as the above content, so the detailed description is omitted.

[0121] The wireless power transmission module 400 described above can also be implemented as a wireless power receiving module in which the wireless power transmission antenna 220 performs the role of a wireless power receiving antenna for receiving wireless power, and can also be implemented as a wireless power transmission module in which the wireless power transmission antenna 220 performs the role of a wireless power transmission antenna for transmitting wireless power to the outside.

[0122] Furthermore, when the wireless power transmission module 400 is implemented as a wireless power receiving module, the wireless power transmission module 400 can be applicable to a portable terminal such as a mobile phone, a tablet computer, etc.

[0123] On the other hand, the magnetic field shielding gasket 100 described above can be manufactured by the following manufacturing method.

[0124] Reference Fig.13First, when the crack portion 130 is formed to form the eddy current reducing pattern portion 120 , the method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention may include a first step S11 and a second step S12 .

[0125] For example, the first step S11 may be a step of preparing a plate-shaped gasket body made of a magnetic material and having a first area, and the second step S12 may be a step of dividing the gasket body into shielding gaskets having a second area relatively smaller than the first area while applying pressure to the local area so that the local area in the inner region of the shielding gasket can be divided into multiple pieces.

[0126] At this time, the magnetic field shielding gasket manufactured by the manufacturing method of one embodiment of the present invention can form the above-mentioned crack portion 130 through the second step S12.

[0127] Specifically, the first step S11 may be a pre-step of cutting a predetermined size from the gasket body of the first area according to the use location and purpose to produce a finished magnetic field shielding gasket 100. Here, the material of the gasket body may be the same as the gasket body 110 described above.

[0128] That is, the gasket body may be a plate-shaped gasket having a first area and may be made of a magnetic material. Furthermore, the gasket body of the first area may use all the materials mentioned as the material of the gasket body 110. Furthermore, the gasket body may be formed of a material containing a metal component, or may be a gasket subjected to heat treatment.

[0129] On the other hand, the second step S12 may separate the shielding gasket 100 having a second area relatively smaller than the first area from the gasket body having the first area through the mold 10 .

[0130] Accordingly, the method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention can produce a plurality of shielding gaskets 100 from one magnetic gasket through the second step S12 .

[0131] At this time, as described above, in the manufacturing method of the magnetic field shielding gasket according to an embodiment of the present invention, the shielding gasket 100 having the second area is separated from the gasket body having the first area through the second step, and the crack portion 130 can be formed on the shielding gasket 100 at the same time.

[0132] That is, in the second step S12 , the shielding gasket 100 having the second area is separated from the gasket body having the first area by a single process using one mold 10 , and the crack portion 130 may also be formed on the shielding gasket 100 separated with the second area.

[0133] The second step S12 described above can be used in Fig.14 The mold 10 shown is implemented.

[0134] That is, the mold 10 may include a cutting blade 12 and at least one pressurizing component 14, wherein the cutting blade 12 is used to process the frame of the shielding gasket, and the at least one pressurizing component 14 is arranged on the inner side of the cutting blade 12 and is used to pressurize the local area without penetrating the gasket body.

[0135] For example, Fig.14 As shown, the pressurizing member 14 may be in the shape of a strip having a predetermined length, and may be formed in an appropriate number of more than one.

[0136] As another example, Fig.15 As shown, the pressurizing member 14 may be a crack cutting blade 16 having a shape corresponding to the shape of the regular crack 133, and similarly, more than one appropriate number of the crack cutting blades 16 may be formed.

[0137] At this time, a plurality of the pressurizing members 14 may be disposed inside the cutting blade 12 , and the plurality of pressurizing members 14 may be disposed at intervals from each other.

[0138] Furthermore, the end of the pressing member 14 and the end of the cutting blade 12 may form a horizontal plane with each other, but may have a length that does not protrude from the end of the cutting blade 12 .

[0139] At this time, the pressurizing part 14 can be formed so that the end in contact with the gasket body has a predetermined width and length or a cross-sectional area of ​​a shape corresponding to the above-mentioned regular crack 133, and the cutting blade 12 can be formed to have a shape roughly the same as the overall frame of the shielding gasket 100 as a finished product.

[0140] Accordingly, in the second step, if the mold 10 is pressurized on the gasket body of the first area, the shielding gasket 100 having the second area is separated from the gasket body of the first area by the cutting blade 12, and at the same time, the shielding gasket 100 separated from the gasket body can form the crack portion 130 in the inner area at a position corresponding to the pressurizing component 14.

[0141] Here, the cutting blade 12 may penetrate the gasket body having the first area and pressurize the gasket body.

[0142] Then, the pressurizing member 14 may pressurize the gasket body with or without penetrating the gasket body, depending on the situation.

[0143] Specifically, when the end portion of the pressing member 14 is formed to have a cross-sectional area having a predetermined width and length (see Fig.14), the gasket body can be pressurized without penetrating; when the pressurizing member 14 is formed by the above-mentioned crack blade 16, the gasket body can be pressurized through.

[0144] Furthermore, in the second step, in the process of forming the crack portion 130 by the pressurizing member 14 , cracks 132 are generated from the frame of the predetermined crack portion 130 , or irregular cracks 134 derived from a plurality of regular cracks 133 may be generated.

[0145] According to the manufacturing method of one embodiment of the present invention, the area corresponding to the position of the pressurizing member 14 can be divided into a plurality of blocks by applying a pressurizing force to the gasket body side by the pressurizing member 14. Thus, the crack portion 130 can be formed in the area corresponding to the position of the pressurizing member 14.

[0146] That is, the method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention does not require additional processes, but forms the crack portion 130 in one process of separating the shielding gasket 100 having a predetermined size from the gasket body, thereby simplifying the production process.

[0147] Accordingly, the shielding gasket 100 produced by the manufacturing method of a magnetic field shielding gasket according to an embodiment of the present invention can increase the overall resistance through the crack portion 130, reduce the loss caused by eddy current, increase the Q value, and further improve the transmission efficiency of the antenna.

[0148] Furthermore, according to the manufacturing method of one embodiment of the present invention, the portion where only the pressure is applied by the pressurizing member 14 is divided into a plurality of pieces, thereby preventing burrs from being generated in the portion where the crack portion 130 is formed or particles from being separated from the crack portion 130 from being generated.

[0149] Therefore, according to the manufacturing method of the present invention, the short circuit defect of the antenna 220, 230 caused by burrs or particles can be improved, thereby improving the production yield. In addition, when the antenna 220, 230 is configured as an antenna pattern formed on the circuit board 210, the short circuit of the antenna caused by burrs or particles is fundamentally prevented, so even if the thickness of the cover layer in the circuit board 210 is not increased, the short circuit defect of the antenna caused by burrs or debris can be improved.

[0150] Accordingly, the circuit board 210 can use a covering layer with the same thin thickness as before. Therefore, the magnetic field shielding gasket 100 manufactured by the manufacturing method of one embodiment of the present invention can fundamentally prevent the occurrence of short circuits caused by burrs or particles even if the antenna unit 200 is used with a circuit board 210 including a covering layer with a thin thickness as before. Therefore, it has the advantage of saving production costs while reducing the overall thickness.

[0151] Below, refer to Fig.17 When a through portion 140 is formed to form an eddy current reduction pattern portion 120, a method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention may include: a step (S1) of preparing a gasket body M of a first area, a step (S2) of punching the gasket body M for the first time, and a step (S3) of punching the gasket body M for the second time.

[0152] The step (S1) of preparing the gasket body M of the first area may be a preparation step of cutting the gasket body M into a predetermined size according to the place of use and purpose to manufacture the shielding gasket 300 as a finished product.

[0153] That is, Fig.25 As shown, the shielding gasket 300 may include a gasket body 110 of a second area, and the above-mentioned through portion 140 and crack 141 may be formed on the side of the gasket body 110 of the second area by a step (S2) of punching the gasket body M of the first area for the first time and a step (S3) of punching the gasket body M of the first area for the second time.

[0154] As described above, the gasket body M of the first area may be a plate-shaped gasket having the first area, and may be made of a material having magnetism.

[0155] At this time, the gasket body M of the first area may be formed of a material containing a metal component and may be a gasket subjected to heat treatment so that a plurality of cracks 141 may be formed from the through portion 140 by an external force during the process of forming the through portion 140 of the gasket body M of the first area.

[0156] The step (S1) of preparing a gasket body M of a first area may include the following steps when the gasket body M is formed into a multi-layer gasket: stacking a plurality of gaskets 111a through a first adhesive layer 111b to form a multi-layer gasket of a first area; and attaching a protective film 113 to at least one of the upper and lower surfaces of the multi-layer gasket by coating a second adhesive layer 112 of adhesive on both sides of the substrate.

[0157] At this time, as described above, the protective film 113 attached to the gasket body M of the first area may be a removable release film.

[0158] Accordingly, if an outer frame L specifying a second area is formed on the side of the gasket body M having the first area through the second stamping step (S3) described later, the shielding gasket 300 having the second area can be separated from the gasket body M having the first area with the second adhesive layer 112 exposed on one side.

[0159] Accordingly, the shielding gasket 300 separated from the gasket main body M of the first area can be attached to other components by using the second adhesive layer 112 formed on one side.

[0160] As a non-limiting example, Fig.18 As shown in the enlarged view of FIG. 1 , the gasket body M of the first area may include a pair of protective films 113 attached to the upper and lower surfaces respectively through the second adhesive layer 112. In such a case, the second adhesive layer 112 may be an adhesive applied on both sides of the substrate.

[0161] However, the present invention is not limited thereto, but the protective film 113 may be attached to only one of the upper and lower surfaces of the gasket body 110 of the first area through the second adhesive layer 112, and the second adhesive layer 112 may also be a liquid or gel adhesive.

[0162] The step (S2) of punching the gasket body M of the first area for the first time may be a step of forming a through portion 140 having a predetermined width and length in the inner region of the gasket body M of the first area and forming a plurality of cracks 141 extending from the through portion 140. Here, the through portion 140 may be a linear through portion having a predetermined width and length or a through portion in the form of a dotted line as described above.

[0163] That is, the step (S2) of punching the gasket body M of the first area for the first time may be a step of forming a through portion 140 in the inner area of ​​the outer frame L specified by the step (S3) of punching the gasket body M of the first area for the second time to be described later, and may be a step of simultaneously forming a plurality of cracks 141 generated from the through portion 140 together with the through portion 140.

[0164] Such a step (S2) of first punching the gasket body of the first area can be utilized in Fig.18 The punching device shown is performed.

[0165] For example, the stamping device may include: an upper mold 10 for the first stamping, which has a plurality of protrusions 18 protruding to a predetermined height on one side; a lower mold 20 for the first stamping, which is arranged at the lower part of the upper mold 10 for the first stamping and has opening holes 22 formed through the upper mold 10 at positions corresponding to the plurality of protrusions 18; and a plurality of guide rods G, which guide the moving direction of the upper mold 10 for the first stamping.

[0166] In the above case, the plurality of protrusions 18 and the plurality of opening holes 22 may have shapes corresponding to the above-mentioned through portion 140 .

[0167] For example, the plurality of protrusions 18 and the plurality of openings 22 may be formed in a linear shape having a predetermined width and length or in the above-mentioned dotted line shape, and may be formed in an appropriate number of more than one. In addition, the plurality of protrusions 18 and the plurality of openings 22 may be formed in a length having a length longer than a width.

[0168] In addition, if Fig.19 and Fig. 20 As shown, the plurality of protrusions 18 and the plurality of opening holes 22 may be arranged at intervals from each other, and may be arranged radially with a virtual center point as a reference.

[0169] At this time, a first guide hole H1 through which the guide rod G can pass can be formed on the upper die 10 side for the first punching, and at least one second guide hole H2 through which the guide rod G can pass can be formed on the gasket body M side of the first area.

[0170] Accordingly, if the guide rod G is inserted into the first guide hole H1, the movement direction of the first punching upper mold 10 can be guided along the guide rod G, and if the guide rod G is inserted into the second guide hole H2, the movement of the gasket body M of the first area can be prevented.

[0171] Accordingly, the gasket body M of the first area can be configured to be located between the upper mold 10 for the first stamping and the lower mold 20 for the first stamping when the guide rod G is inserted into at least one second guide hole H2, and one side of the gasket body M of the first area can be pressurized by moving the upper mold 10 for the first stamping.

[0172] Accordingly, during the first stamping process, if the upper mold 10 for the first stamping is lowered, the protrusion 18 can pressurize the gasket body M of the first area, and a through portion 140 can be formed by the pressurization of the protrusion 18 at a position corresponding to the protrusion 18 on the side of the gasket body M of the first area.

[0173] Furthermore, a plurality of cracks 141 may be formed on the frame side of the through-portion 140 by the pressure transmitted from the protrusion 18 to form the through-portion 140 .

[0174] That is, if we use Fig.19 and Fig. 20 The upper die 10 for the first stamping and the lower die 20 for the first stamping shown perform the first stamping process, and a through portion 140 having a predetermined width and length can be formed in the inner area of ​​the gasket body M of the first area at a position corresponding to the protrusion 18.

[0175] In the above case, according to the size of the protrusion 18 and the opening hole 22 respectively arranged in the first punching upper die 10 and the first punching lower die 20, the inner area of ​​the gasket body M of the first area can also be formed. Fig.23 A through-portion 140 is shown.

[0176] Furthermore, in Fig.23 The periphery of the through-portion 140 shown may form a Figure 5 Crack 141 of the shown morphology.

[0177] Here, the cut pieces separated from the gasket body M having the first area while the through-portion 140 is formed may descend downward through the opening hole 22 .

[0178] As described above, the manufacturing method of a magnetic field shielding gasket according to an embodiment of the present invention can form multiple cracks 141 generated from the through-portion 140 during the stamping process of forming the through-portion 140 having a predetermined width and length, so that the through-portion and the cracks generated thereby can only be locally formed in a part of the total area of ​​the shielding gasket 300 as a finished product.

[0179] Therefore, by using the method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention, a shielding gasket that meets the design conditions and required specifications can be easily manufactured.

[0180] Accordingly, the shielding gasket 300 produced by the method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention has a very thin thickness and can also achieve a high magnetic permeability of more than 2000.

[0181] Furthermore, the shielding gasket 300 produced by the manufacturing method of the magnetic field shielding gasket of an embodiment of the present invention can increase the overall resistance through the through portion 140 and the crack 141 generated from the through portion 140, thereby reducing the loss caused by eddy current, increasing the Q value, and improving the transmission efficiency of the antenna.

[0182] In the above case, the protrusion 18 of the first punching upper die 10 and the opening hole 22 of the first punching lower die 20 may be appropriately changed according to the shape of the through portion 140 formed in the shielding gasket 300 as a finished product.

[0183] Furthermore, although not shown, the protrusion 18 of the first punching upper die 10 and the opening hole 22 of the first punching lower die 20 can be appropriately changed according to the shape of the through-portion formed in the shielding gasket 300 as a finished product. That is, the protrusion 18 of the first punching upper die 10 and the opening hole 22 of the first punching lower die 20 can be configured to be the same as in Fig. 9 and Fig.11 The through-portions 140 in various forms shown correspond to each other.

[0184] For example, the plurality of protrusions 18 and the plurality of opening holes 22 may be respectively arranged radially with the virtual center point as a reference, or may be arranged perpendicularly or parallel to the width direction or the length direction of the gasket body M of the first area.

[0185] In addition, the plurality of protrusions 18 and the plurality of opening holes 22 may be respectively arranged to be inclined at a predetermined angle with respect to the width direction or the length direction of the gasket body M of the first area, or may be formed into an arc shape having a predetermined length.

[0186] Furthermore, the plurality of protrusions 18 and the plurality of opening holes 22 may also be a combination of at least two of the above four forms.

[0187] Accordingly, the shielding gasket 300 punched out from the gasket body M of the first area by a punching process can be formed. Fig. 9 and Fig.11 Various through-portions 140 and cracks 141 are shown.

[0188] On the other hand, the upper mold 10 for the first stamping used in the step (S2) of stamping the gasket body of the first area for the first time can also be constructed to remove the cut piece separated from the gasket body M of the first area from the gasket body M of the first area during the process of forming the through portion 140 of the gasket body M of the first area.

[0189] That is, the protrusion 18 in the first punching upper die 10 may be changed to Fig.21 The form shown.

[0190] Specifically, if Fig.21 As shown, the upper die 10 for the first punching may include a frame blade 18' and a separation component 19. The frame blade 18' is in a ring shape protruding from one side, and the separation component 19 is protruding from the inner side of the frame blade 18'.

[0191] Here, the separating member 19 may be formed into a surface shape having a predetermined width and length, and the width and length of the separating member 19 may be relatively smaller than the width and length of the frame blade 18'. In addition, the separating member 19 may be formed to protrude a predetermined height from the inner bottom surface of the frame blade 18', and the protruding height of the separating member 19 may be the same as the height of the frame blade 18' or relatively lower than the height of the frame blade 18'.

[0192] Furthermore, the frame blade 18 ′ may be of a size corresponding to the through portion 140 .

[0193] Accordingly, during the first stamping process, if the above-mentioned first stamping upper mold 10 is pressurized on the gasket body M of the first area, the border blade 18' can form a through portion 140 with a predetermined width and length, and the separation component 19 can pressurize the cutting piece cut from the gasket body M of the first area by the border blade 18' downward to form the through portion 140.

[0194] Accordingly, the cut piece cut from the gasket body M of the first area by the frame blade 18' can be separated from the gasket body M of the first area by the separation component 19, and the cut piece separated from the gasket body M of the first area can fall downward through the opening hole 22 of the lower mold 20 for the first stamping.

[0195] Therefore, if the upper mold 10 for the first stamping is used, there is no need to separately separate the cut piece cut from the gasket body M of the first area by the frame blade 18' during the process of forming the through portion 140, so the cut piece can be easily removed during the first stamping process.

[0196] According to this, by using the first punching upper die 10, the process of forming the through-portion 140 and the crack 141 inside the gasket body M and the work of removing unnecessary cut pieces generated during the formation of the through-portion 140 can be performed simultaneously.

[0197] Accordingly, if the upper die 10 for the first punching is used, even if the shielding gasket 300 including the through-portion 140 and the crack 141 is manufactured, the overall process can be simplified, thereby having the advantage of reducing production costs.

[0198] The step ( S3 ) of punching the gasket body of the first area for the second time may be a step of forming the shielding gasket 300 having a second area relatively smaller than the first area of ​​the gasket body M from the gasket body M of the first area.

[0199] That is, the step (S3) of punching the gasket body of the first area for the second time can be a step of processing the gasket body M of the first area to the size of the shielding gasket 300 as a finished product, a step of forming an outer frame L of the shielding gasket 300 having a second area from the gasket body M of the first area, and a step of processing the shielding gasket 300 as a finished product separately from the gasket body M of the first area along the outer frame L.

[0200] In the case as described above, the outer frame L may be formed from the gasket body M of the first area to include the through portion 140 formed by the first punching upper die 10 .

[0201] Specifically, the step (S3) of punching the gasket body of the first area for the second time can be performed by Fig. 22 The second punching is shown to be performed using die 30 .

[0202] That is, the secondary punching die 30 may include at least one outer frame blade 32 formed on one surface to protrude by a predetermined height, and the outer frame blade 32 may be formed in a hollow ring shape.

[0203] In addition, similar to the first punching upper die 10 described above, the second punching die 30 may include a first guide hole H1 through which a guide rod G passes, and the second punching die 30 may be guided and moved by the guide rod G.

[0204] Accordingly, if the second punching die 30 is pressed on the gasket body M side of the first area where the through portion 140 and the crack 141 generated thereby are formed by the first punching upper die 10, Fig.24 As shown, on the side of the gasket body M of the first area, the outer frame L defining the second area can be formed while surrounding the plurality of through portions 140 by the outer frame blade 32 .

[0205] According to this, if the portion having the second area defined by the outer frame L is separated from the gasket body M having the first area, the shielding gasket 300 as a finished product can be manufactured from the gasket body M having the first area.

[0206] At this time, as described above, in the step (S3) of punching the gasket body of the first area for the second time, the gasket body M of the first area may include a pair of protective films 113a, 113b, and the pair of protective films 113a, 113b are respectively attached to the upper and lower surfaces of the gasket body M through the second adhesive layers 112a, 112b; the outer frame L formed by the second punching mold 30 can be formed to penetrate the gasket body M of the first area and the second adhesive layers 112a, 112b completely, and the outer frame L may not be formed on the side of the protective film 113b attached to the lower surface of the gasket body M of the first area.

[0207] That is, Fig.25 As shown, the outer frame L can be formed to penetrate the gasket body M of the first area, the second adhesive layer 112a, 112b and the protective film 113a attached to the upper surface of the gasket body M while not penetrating the protective film 113b attached to the lower surface of the gasket body M.

[0208] Accordingly, through a method for manufacturing a magnetic field shielding gasket according to an embodiment of the present invention, when a gasket body M having a first area forms a shielding gasket 300 having a second area, the protective film 113b attached to the lower surface of the gasket body M having the first area can act as a tray that maintains the state in which the multiple shielding gaskets 300 having the second area are attached to one side.

[0209] In addition, if the shielding gasket 300 having the second area is separated from the gasket body M having the first area, the shielding gasket 300 having the second area separated from the gasket body M having the first area may expose the second adhesive layer 112 b to the outside on one side.

[0210] Therefore, the user can attach the shielding gasket 300 to other components or attach other components to the shielding gasket 300 by using the second adhesive layer 112 b exposed to the outside after the shielding gasket 300 of the second area is separated from the gasket body M of the first area.

[0211] However, the formation method of the above-mentioned outer frame L is not limited thereto, and the outer frame L formed in the step (S3) of punching the first area of ​​the gasket body for the second time can also be formed to completely separate the shielding gasket 300 from the first area of ​​the gasket body M.

[0212] That is, the outer frame L formed by the second stamping mold 30 can also be formed to penetrate the first area of ​​the gasket body M, the second adhesive layer 112a, 112b and a pair of protective films 113a, 113b attached to the upper and lower surfaces of the first area of ​​the gasket body M.

[0213] An embodiment of the present invention has been described above, but the concept of the present invention is not limited to the embodiment presented in this specification. Instead, technicians in the technical field who understand the concept of the present invention can easily propose other embodiments within the same scope of the concept by adding, changing, deleting, increasing, etc. components, and these are also included in the scope of the concept of the present invention.

Claims

1. A magnetic field shielding gasket, arranged on one side of an antenna, wherein the antenna comprises a hollow portion having a predetermined area at the center and a pattern portion surrounding the hollow portion; The magnetic field shielding gasket comprises: The gasket body is made of magnetic material to shield the magnetic field; and At least one eddy current reducing pattern portion is formed on the gasket body to increase the resistance of the gasket body and reduce the generation of eddy current. in: The magnetic field shielding gasket is used as a magnetic field shielding gasket for a combined antenna unit, wherein the combined antenna unit is a wireless power transmission antenna and a wireless communication antenna formed in a pattern on at least one side of a circuit board so that the wireless communication antenna surrounds the wireless power transmission antenna, and The eddy current reduction pattern portion is not formed in a region corresponding to the wireless communication antenna, but is located in a region corresponding to the wireless power transmission antenna, within the total area of ​​the gasket body. wherein the eddy current reduction pattern portion is locally formed in a portion of an area corresponding to the pattern portion of the antenna, so that the gasket body has a magnetic permeability of more than 2000 and the total area of ​​the gasket body is not divided into multiple pieces and has a linear area whose length is greater than its width, Wherein, the remaining part of the total area of ​​the gasket body except the eddy current reducing pattern portion is not divided into a plurality of blocks.

2. The magnetic field shielding gasket according to claim 1, It is characterized in that The eddy current reduction pattern portion is a portion divided into a plurality of pieces by a plurality of cracks in the gasket body.

3. The magnetic field shielding gasket according to claim 2, It is characterized in that The gasket body includes a plurality of cracks extending from a frame defining the eddy current reducing pattern portion.

4. The magnetic field shielding gasket according to claim 2, It is characterized in that The eddy current reduction pattern portion comprises: forming a plurality of regular cracks of a predetermined shape; and A plurality of irregular cracks are derived from the plurality of regular cracks.

5. The magnetic field shielding gasket according to claim 4, It is characterized in that The regular cracks are formed to have any one of the cross-sectional shapes of "-", "+", "×", "*", "⊥" and "·".

6. The magnetic field shielding gasket according to claim 1, It is characterized in that The eddy current reduction pattern portion is a through portion that penetrates the gasket body.

7. The magnetic field shielding gasket according to claim 6, It is characterized in that The eddy current reduction pattern portion includes a plurality of the through portions, The plurality of through portions are arranged in a linear shape along one direction to form a dotted line shape, and are arranged at a predetermined interval from each other.

8. The magnetic field shielding gasket according to claim 6, It is characterized in that The eddy current reducing pattern portion includes a plurality of cracks extending from the through portion.

9. The magnetic field shielding gasket according to claim 1, It is characterized in that A plurality of the eddy current reducing pattern portions are formed in a region corresponding to the pattern portion, and the plurality of eddy current reducing pattern portions are arranged radially.

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