KR20170142651A - Antenna module, and mobile terminal comprising the same - Google Patents

Abstract

The present invention relates to an antenna module and a mobile terminal having the same. According to the present invention, the antenna module comprises: a magnetic sheet; a non-magnetic substrate placed on one surface of the magnetic sheet to have a first antenna pattern unit; and a flexible flat cable placed on the other surface of the magnetic sheet to have a second antenna pattern unit wherein a plurality of conductor lines are arranged in a straight line on a flat surface. The first antenna pattern unit and the second antenna pattern unit are electrically connected. The present invention is able to provide functions of wireless charging, MST, and NFC at the same time, to simplify a process, and to reduce costs, providing a slim design and a grip of metallic materials.

Description

TECHNICAL FIELD [0001] The present invention relates to an antenna module and a mobile terminal including the antenna module.

The present invention relates to an antenna module capable of reducing cost and simplifying a process while simultaneously providing functions such as wireless charging, MST and NFC, and a mobile terminal including the antenna module.

A terminal can be divided into a mobile / portable terminal and a stationary terminal depending on whether the terminal is movable or not. Also, the mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Mobile phones such as mobile phones, PDAs, PMPs, navigation devices, laptops, etc., include basic functions such as phone calls, video / music playback and directions, and also include DMB, And short-range communication. Accordingly, the mobile terminal has a plurality of antennas for wireless communication such as wireless Internet, Bluetooth, etc. In addition, the mobile terminal can perform functions such as exchange of information, settlement, ticket reservation, and search using terminals (NFC) And is being applied to portable terminals. To this end, the portable terminal is equipped with one or more antenna modules for portable terminals used for wireless communication and near-field communication.

Generally, since the back cover of the mobile terminal is formed of an insulating material made of polycarbonate, the communication of the antenna module mounted on the battery pack, the back cover, etc. is not affected. However, there is an increasing tendency to manufacture metal cover due to trends favored by consumers (for example, design trends such as grip feeling and appearance). In this case, there is a problem that the antenna signal is shielded by the metal material, and wireless communication and short-range wireless communication can not be performed. In addition, there is a problem that the antenna module built in the terminal is thick and the manufacturing process is complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for providing a plurality of antenna functions, such as wireless charging (WPC), magnetic security transmission (MST), short- An antenna module capable of simultaneously exhibiting thinning due to a reduction in thickness, and a mobile terminal including the antenna module.

In order to achieve the above object, the present invention provides a magnetic sheet comprising: a magnetic sheet; A non-magnetic substrate disposed on one surface of the magnetic sheet and having a first antenna pattern portion; And a flexible flat cable disposed on the other surface of the magnetic sheet and having a second antenna pattern portion in which a plurality of conductor lines are arranged in a plane and straight line, and the first antenna pattern portion and the second antenna pattern portion are electrically connected The antenna module includes:

In the present invention, the nonmagnetic substrate may be a flexible printed circuit board (FCCL) or a flexible printed circuit board (FPCB) in which a copper foil layer and an insulating adhesive layer are laminated.

In the present invention, the first antenna pattern part may be arranged such that a plurality of conductor lines formed by etching the copper foil layer are linearly arranged in a line in the longitudinal direction of the magnetic sheet.

In the present invention, the second antenna pattern portion may be arranged such that a plurality of conductor lines covered with an insulating film are arranged in parallel to each other in the longitudinal direction of the magnetic sheet.

In the present invention, the first antenna pattern part and the second antenna pattern part may each be larger than the size of the magnetic sheet and enclose the magnetic sheet.

In the present invention, the first contact portion is provided at the end of the first antenna pattern portion protruding outside the magnetic sheet, the second contact portion is provided at the end of the second antenna pattern portion protruding outside the magnetic sheet, The first contact part and the second contact part may be electrically connected.

In the present invention, the first contact portion includes at least one connection portion that penetrates the non-magnetic substrate in the longitudinal direction, and the second contact portion exposes a plurality of conductor lines covered with the insulating film, And an anisotropic conductive portion disposed on the line, wherein the first contact portion and the second contact portion are electrically connected by physical contact between the connection portion and the anisotropic conductive portion.

In the present invention, the anisotropic conductive part may be selected from the group consisting of an anisotropic conductive film (ACF), an anisotropic conductive paste (ACP), and an anisotropic conductive adhesive (ACA).

In the present invention, the anisotropic conductive portion includes a plurality of conductive particles having an average particle diameter of 5 to 20 占 퐉 and a binder resin and is connected via the plurality of conductive particles arranged in the thickness direction, and has a temperature of 190 占 폚 and a pressure of 0.3 MPa The contact resistance (?) Of the anisotropic conductive portion after being held for 13 to 30 seconds under the condition of?

In the present invention, the flexible flat cable may be (i) a single-sided insulation film in which a plurality of conductor lines, an adhesive layer and a resin layer are sequentially laminated, or (ii) A double-sided type insulating film in which an adhesive layer and a resin layer are sequentially laminated.

In the present invention, an insulating adhesive layer may further be provided between the magnetic sheet and the flexible flat cable. Here, the insulating adhesive layer may be selected from the group consisting of epoxy resin, and polyimide.

In the present invention, the magnetic insulation sheet may be a sheet or a thin metal plate including a magnetic powder and a polymer resin.

Here, the magnetic powder may be selected from the group consisting of magnetic metal powder, metal flake, and ferrite.

In the present invention, the antenna module may further include a protective layer covering the first antenna pattern portion disposed at the outermost portion, wherein the protective layer may be a coverlay film or a release film.

In the present invention, the antenna module may include at least one antenna pattern of a magnetic security transmission (MST) antenna pattern, a wireless charging (WPC) antenna pattern, and a short-range wireless communication (NFC) antenna pattern.

The present invention also relates to a metal case; And the antenna module mounted on the metal case.

The present invention can reduce the cost and simplify the manufacturing process by replacing the FPCB with a flexible flat cable (FFC) in an antenna module including a conventional ferrite sheet and a flexible printed circuit board (FPCB).

Also, in the present invention, the magnetic security transmission (MST) characteristic realized in the existing Z-axis direction can be changed to the Y-axis direction by designing the X-axis antenna pattern that covers the magnetic sheet in the upper and lower surfaces. Accordingly, the MST characteristic can be ensured even though it is mounted on a mobile terminal having a full metal body.

In addition, the flexible flat cable provided in the antenna module of the present invention has excellent mechanical and electrical characteristics under high temperature / high humidity environment conditions, and is excellent in heat resistance characteristics such as shrinkability and denaturation due to heat, The electrical connection structure is improved.

1 is a schematic cross-sectional view of an antenna module according to an embodiment of the present invention.
2 is a schematic cross-sectional view of an antenna module according to another embodiment of the present invention.
3 schematically shows a connection structure between a first surface (first antenna pattern portion) and a second surface (second antenna pattern portion) of the antenna module according to an embodiment of the present invention.
FIG. 4 is a graph illustrating a change in contact resistance according to a pressure application time in the anisotropic conductive part of the antenna module according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it includes not only 'directly connected' but also 'indirectly connected' do. Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

BACKGROUND ART [0002] Recently, there has been an increasing demand for manufacturing metal cover for a mobile terminal due to design trends such as a feeling of grip and appearance that a consumer prefers. However, since the metal material shields the built-in antenna signal, there is a problem that it is impossible to perform the near field wireless communication (NFC) or the magnetic security transmission (MST) wireless communication completely. In addition, there is a problem that the antenna module built in the terminal is thick and the manufacturing process is complicated.

Accordingly, in the present invention, a conventional antenna module structure which is stacked in the order of FPCB-coil-ferrite sheet and exhibits Z-axis MST characteristics is transformed into an X-axis antenna pattern design that surrounds a magnetic sheet (e.g., a ferrite sheet) To secure the MST characteristic in the Y-axis direction. Accordingly, even when the antenna module of the present invention is used together with a metallic case or a rear cover, the MST characteristic can be secured without being shielded by the metal.

Generally, the magnetic field is formed to be larger as the surface area of the conductor is wider. Even if the conductor of the same size is used, the FPCB has a trapezoidal shape and a lowered perpendicularity. The surface area becomes smaller than that of the conductor. Accordingly, in the present invention, the MST characteristics can be improved by ensuring the perpendicularity of the coil-applied conductor through the slitting conductor. In the present invention, the FPCB is replaced with a flexible flat cable in the antenna module, thereby achieving a cost saving effect and a thinning effect.

Further, in the present invention, the method of connecting the upper and lower coils through the formation of the via hole is changed to the ACF direct bonding method using the anisotropic conductive part, thereby simplifying the process and improving the reliability.

<Antenna module>

The antenna module according to the present invention includes a non-magnetic substrate, a magnetic sheet, and a flexible flat cable, and may have two embodiments as described below.

FIG. 1 schematically shows a cross-sectional structure of an antenna module 100 according to an embodiment of the present invention, in which a flexible flat cable is disposed on one surface of a magnetic sheet.

More specifically, the antenna module 100 includes a magnetic sheet 20; A nonmagnetic substrate (10) disposed on one side of the magnetic sheet and having a first antenna pattern portion; And a flexible flat cable 30 disposed on the other side of the magnetic sheet and having a second antenna pattern portion. At this time, the first antenna pattern part and the second antenna pattern part are electrically connected.

In the antenna module 100 according to the present invention, the magnetic sheet 20 may be a sheet containing a conventional magnetic powder and a polymer resin known in the art, or a thin metal plate may be used.

The magnetic powder is not particularly limited, and examples thereof include a metal powder, a metal flake, a ferrite, or a mixture of at least one thereof. It is preferably a ferrite powder. At this time, the size, shape and content of the magnetic powder are not particularly limited and can be appropriately adjusted within the conventional range known in the art.

The polymeric resin constituting the magnetic sheet 20 may be any conventional polymer known in the art without limitation, and examples thereof include an epoxy resin and the like.

The magnetic sheet 20 may be manufactured by a conventional method known in the art. For example, a slurry containing a magnetic powder, a solvent and a polymer resin is formed, the slurry is formed into a thin sheet, .

The magnetic sheet 20 may be a thin plate-shaped conductive metal. Examples of such conductive metals are stainless steel (SUS), stainless steel alloys, copper, tin plated copper, or nickel plated copper.

The thickness of the magnetic sheet 20 is suitably adjustable within the conventional range known in the art. For example, in the range of 50 to 200 mu m, and preferably in the range of 100 to 150 mu m.

The size of the magnetic sheet 20 is not particularly limited. However, in order to have a structure in which the nonmagnetic substrate 10 and the flexible flat cable 30 wrap the magnetic sheet on the upper and lower surfaces, the nonmagnetic substrate 10 and the flexible flat cable 30 (30). It is preferable to use the first antenna pattern portion 11 provided on the nonmagnetic substrate 10 and the flexible flat cable 30 and the magnetic sheet smaller in size than the second antenna pattern portion.

In the antenna module 100 according to the present invention, the non-magnetic substrate 10 can use any conventional flexible copper clad laminate (FCCL) or flexible printed circuit board (FPCB) known in the art without limitation.

The flexible copper-clad laminate or the flexible printed circuit board includes one or more copper foil layers (not shown) and one or more insulating adhesive layers 12, respectively. Here, the copper foil layer forms a plurality of conductor lines through conventional dry or wet etching known in the art, such that a plurality of conductor lines are formed on a first surface (e.g., top surface) of a non- The first antenna pattern portion 11 is arranged in a diagonal line.

It is preferable that the first antenna pattern portions 11 are arranged linearly in a planar shape along the longitudinal direction of the magnetic sheet. However, the present invention is not particularly limited thereto, and the magnetic sheets may be arranged in the longitudinal direction of the magnetic sheets, or may be freely deformed according to the needs of the user.

In the present invention, since the nonmagnetic substrate 10 has a larger size than the adjacent magnetic sheets 20, when the first and second magnetic pattern portions 11 and 12 are joined together, the end portion of the first antenna pattern portion 11 protrudes outside the magnetic sheet 20 . The present invention includes a first contact portion 50 provided at one or both ends of the first antenna pattern portion 11 protruding out of the magnetic sheet 20 as described above. Accordingly, in the present invention, a separate contact portion for connecting the antenna pattern portion to the external terminal, and the manufacturing process of the contact portion itself can be omitted, thereby reducing the manufacturing cost and simplifying the manufacturing process .

The first contact part 50 electrically connects the first antenna pattern part 11 to the second antenna pattern part. The shape, the structure, and the structure thereof as long as it can perform the above-described role of the electrical connection.

Specifically, the first contact portion 50 may be formed of a conventional conductive metal layer known in the art. Preferably, the first contact portion 50 is formed of a conductive metal layer having the same composition as the first antenna pattern portion 11, Lt; / RTI &gt; The thickness of the first contact portion 50 may be equal to or different from the thickness of the first antenna pattern portion 11 and is not particularly limited. For example, it may range from 30 to 100 mu m, and preferably from 40 to 70 mu m.

In the present invention, the first contact part 50 may include at least one connection part (not shown) penetrating the non-magnetic substrate 10 in the longitudinal direction. The first antenna pattern portion and the second antenna pattern portion or the second contact portion may be electrically connected to each other through the connection portion.

In the nonmagnetic substrate 10 of the present invention, the insulating adhesive layer 12 is formed on the other substrate that physically contacts the nonmagnetic substrate 10, for example, the physical sheet 20 with the magnetic sheet 20 and / And serves to make the bonding more robust.

The insulating adhesive layer 12 may be formed of a conventional polymer resin known in the art, and may be at least one selected from the group consisting of epoxy resin and polyimide. However, it is not particularly limited.

The thickness of the insulating adhesive layer 12 is not particularly limited, and may be in the range of, for example, 10 to 50 μm, preferably 15 to 30 μm.

In the antenna module 100 according to the present invention, the flexible flat cable 30 can use any conventional flexible flat cable known in the art without limitation.

Specifically, the flexible flat cable 30 has a structure including a plurality of flat plate-shaped conductor lines having a predetermined width and thickness, and an insulating film covering the conductor lines. In the present invention, the flexible flat cable And a plurality of conductor lines arranged linearly in the plane of the first antenna pattern part (30) as a second antenna pattern part.

In the flexible flat cable 30, the type of the conductor line is not particularly limited, but may be made of a conductive metal such as copper, tin-plated copper, or nickel-plated copper. As the conductor line, a thin conductive metal is preferable. The thickness and shape of the conductor line are not particularly limited, and conventional conductors known in the art can be used without limitation. In one example, the thickness of the conductor line may range from 20 to 70 mu m, preferably from 30 to 60 mu m.

The insulating film covering the conductor line may have a structure in which an adhesive layer and a resin layer are laminated in order, or an intermediate layer may be further included between the adhesive layer and the resin layer. Here, the adhesive layer serves to bond the insulating film to the conductor line, and the resin layer is located at the outermost position of the insulating film so that the conductor line can be insulated from the outside. The component of the resin layer is not particularly limited, and for example, polyethylene terephthalate (PET) can be used.

A preferred example of the flexible flat cable 30 according to the present invention is a single-sided insulation film in which a plurality of conductor lines, an adhesive layer and a resin layer are sequentially laminated, or (ii) Type insulating film in which an adhesive layer and a resin layer are sequentially laminated on the upper and lower surfaces, respectively.

The thickness of the flexible flat cable 30 is not particularly limited, and may be in the range of, for example, 100 to 300 μm, preferably 100 to 150 μm.

The flexible flat cable 30 of the present invention has a second antenna pattern portion in which a plurality of conductor lines are arranged in a plane straight line.

It is preferable that the second antenna pattern portion has a structure in which a plurality of conductor lines are arranged in parallel in the direction in which the longitudinal direction of the magnetic sheet 20 intersects. However, the present invention is not particularly limited thereto and can be freely modified according to the needs of the user.

Further, the second antenna pattern portion may be in a form in which a plurality of conductor lines are exposed to the outside, or may be in the form of being covered with an insulating film. In the case where the second antenna pattern unit is constituted as described above, since a conventional flexible flat cable of the related art can be used without a separate manufacturing process for forming the antenna pattern, the simplicity of the process, ease of handling, Can be achieved.

The flexible flat cable 30 is larger in size than the adjacent magnetic sheets 20 in the same manner as the nonmagnetic substrate 10 described above so that the end portions of the second antenna pattern portions are connected to the outside of the magnetic sheet 20 And has a protruding structure. The present invention includes a second contact portion 40 provided at one or both ends of a second antenna pattern portion protruding out of the magnetic sheet 20. Accordingly, in the present invention, the separate contact portion for connecting the antenna pattern portion to the external terminal and the manufacturing process for the contact portion can be omitted, thereby reducing the manufacturing cost and simplifying the manufacturing process.

In the present invention, the second contact portion 40 serves to electrically connect the second antenna pattern portion and the first antenna pattern portion 11. And is not particularly limited to its component, shape and structure as long as it can perform the above-described function of electrically connecting.

In one example, the second contact portion 40 may include an anisotropic conductive portion exposed on a plurality of conductor lines coated on the insulating film and disposed on the exposed conductor line. And may be electrically connected to the first antenna pattern portion or the first contact portion through the anisotropic conductive portion 40.

The anisotropic conductive part is a medium for electrically connecting the second antenna pattern part of the flexible flat cable to the antenna terminal of the antenna module 300 and / or the antenna terminal.

In the present invention, the anisotropic conductive portion is not particularly limited to the constitution, the form, and the like, as long as it has the usual anisotropy and conductivity known in the art. For example, an anisotropic conductive film (ACF), an anisotropic conductive paste (ACP), and an anisotropic conductive adhesive (ACA).

In general, the anisotropic conductive part 40 refers to a film-shaped adhesive in which a plurality of conductive particles are dispersed in an insulating binder resin functioning as an adhesive. The adhesive is conductive in the thickness direction of the film, Quot; refers to a polymer film having an electric anisotropy and an adhesive property. Preferably, a plurality of conductive particles and a binder resin are arranged, and the plurality of conductive particles are arranged and connected in the thickness direction of the anisotropic conductive portion.

In the present invention, the average particle diameter of the conductive particles may be in the range of 5 to 20 mu m, preferably in the range of 5 to 15 mu m, and more preferably in the range of 7 to 9 mu m.

Such an anisotropic conductive part 40 may be a film-like connecting material in which conductive particles are dispersed in an insulating binder containing a thermosetting resin. For example, a binder resin composition in which conductive particles are dispersed is applied to a base film Lt; / RTI &gt; Or in the form of a paste in which conductive particles are dispersed in the insulating binder. At this time, the components of the binder and the conductive particles and / or the composition thereof are not particularly limited and may be appropriately selected within the range of ordinary components and ranges known in the art.

The thickness of the anisotropic conductive part 40 is not particularly limited, and may be in the range of, for example, 10 to 50 mu m, and preferably 20 to 40 mu m.

In the present invention, the second antenna pattern portion and the anisotropic conductive portion 40 may be electrically connected according to a conventional method known in the art.

For example, when the anisotropic conductive part is in a paste state, it may be manufactured by coating an anisotropic conductive paste on an exposed conductor (conductor line) of the flexible flat cable 30 and then drying it. Alternatively, when the anisotropic conductive part is in the form of a sheet or a film, the anisotropic conductive film may be disposed on the exposed conductor line of the flexible flat cable 30, laminated, and then pressed.

As described above, in the present invention, since the flexible flat cable 30 and the anisotropic conductive portion 40 are electrically connected without any additional configuration, flexibility and flatness characteristics of the conventional flexible flat cable are exhibited as they are, And it can exhibit a remarkable volume reduction effect when provided in a terminal.

Further, in the case of using the conventional flexible printed circuit board (FPCB), a process of forming a plurality of via holes passing through the FPCB and electrically connecting the flexible printed circuit board (FPCB) is essentially performed. ), The electrical connection structure of the antenna module is improved, which can simplify the process and reduce the cost. In the present invention, since the perpendicularity of the conductor can be secured by direct connection using the anisotropic conductive layer, the magnetic security transmission (MST) characteristic can be ensured have.

Further, the flexible flat cable 30 and the anisotropic conductive portion 40 having the improved electrical connection structure according to the present invention can exhibit electrical characteristics equivalent to those of the conventional FPCB. For example, the contact resistance (Ω) value of the anisotropic conductive portion may be 0.7 Ω or less, preferably 0.5 Ω or less, after being maintained at a temperature of 190 ° C. and a pressure of 0.3 MPa for 13 to 30 seconds.

In addition, when a crosslinked flexible flat cable is used, long-term reliability can be ensured by maintaining excellent mechanical properties and heat resistance even under severe conditions of high temperature / high humidity.

In the present invention, an insulating adhesive layer (not shown) may further be provided between the magnetic sheet 20 and the flexible flat cable 30. [

The insulating adhesive layer serves to strengthen the adhesion between the magnetic sheet 20 adjacent to the flexible flat cable 30 and the physical bonding due to the increase in adhesion. The component of the insulating adhesive layer is not particularly limited and may be composed of a conventional polymer resin known in the art. For example, at least one selected from the group consisting of an epoxy resin, and a polyimide.

Meanwhile, the antenna module 300 according to the present invention may further include a protection layer 60 formed on the first antenna pattern portion 11 disposed at the outermost portion so as to cover the antenna pattern.

The protective layer 60 may be a coverlay film or a release film, for example. The thickness of the protective layer 60 is not particularly limited. For example, the thickness of the protective layer 60 may be in the range of 10 to 50 mu m, preferably in the range of 20 to 40 mu m.

FIG. 2 is a schematic cross-sectional view of an antenna module 200 according to another embodiment of the present invention, in which a flexible flat cable is disposed on both sides of a magnetic sheet.

More specifically, the antenna module 200 includes a magnetic sheet 20; A first flexible flat cable (30) disposed on one side of the magnetic sheet and having a first antenna pattern portion in which a plurality of conductor lines are arranged in a plane straight line; And a second flexible flat cable 30 disposed on the other surface of the magnetic sheet and having a second antenna pattern portion in which a plurality of conductor lines are arranged in a plane linear shape.

At this time, the first antenna pattern portion and the second antenna pattern portion are electrically connected to the antenna structure or the antenna terminal through the plurality of second contact portions 40, respectively.

Here, the configurations of the magnetic sheet 20 and the flexible flat cable 30 are the same as those in FIG. 1, and therefore will not be described.

FIG. 3 illustrates a connection structure between a first surface (first antenna pattern portion) and a second surface (second antenna pattern portion) of the antenna module according to an embodiment of the present invention in more detail.

Here, the first surface and the second surface refer to the surfaces where the first antenna pattern portion and the second antenna pattern portion are located, respectively, in the antenna module.

3 (a) schematically shows an electrical connection structure of a first antenna pattern unit 320 disposed on an upper portion of a magnetic sheet 310 in an antenna module 300 of the present invention.

3A, the first antenna pattern 320 is positioned on the first surface (top surface) of the nonmagnetic substrate, and the first antenna pattern 320 is formed on the lower surface of the first antenna pattern 320, The magnetic sheet 310 is disposed closely. The first contact part 330 is provided at both ends of the first antenna pattern part 320 protruding to the outside of the magnetic sheet 310. The first contact part 330 includes a non- And is electrically connected to the second contact portion 350 of FIG. 3 (b) through one or more connecting portions (not shown) formed to penetrate in the longitudinal direction.

Here, the first antenna pattern part 330 has a shape in which a plurality of conductor lines are arranged in a plane and linear shape along the longitudinal direction of the magnetic sheet 310.

3B schematically shows an electrical connection structure of a second antenna pattern unit 340 disposed under the magnetic sheet 310 in the antenna module 300 of the present invention.

Referring to FIG. 3B, the second antenna pattern 340 is positioned on the first surface (top surface) of the flexible flat cable, and the second antenna pattern 340 is positioned below the second antenna pattern 340 The small magnetic sheet 310 is disposed closely. A second contact part 350 is provided at both ends of the second antenna pattern part 340 protruding to the outside of the magnetic sheet 310. The second contact part 350 is connected to the anisotropic conductive part And is electrically connected to the first contact portion 330 of FIG. 3 (a).

Here, the second antenna pattern unit 340 has a configuration in which a plurality of conductor lines are arranged in a plane linear shape in a direction in which the longitudinal direction of the magnetic sheet 310 intersects. At this time, the plurality of conductor lines may be coated with an insulating film or may be exposed to the outside.

In the antenna module 300 according to the present invention, the first contact part 320 and the second contact part 340 may be connected to each other in a different configuration (for example, an external terminal As shown in Fig.

The antenna module of the present invention, which is constructed as described above, is mounted inside a mobile terminal and includes at least one of an MST antenna pattern, a WPC antenna pattern, and an NFC antenna pattern for short- And may include one antenna pattern. Preferably, it may be a combo type including a magnetic secure transmission (MST) antenna pattern and a near field communication (NFC) antenna pattern.

<Mobile Terminal>

The present invention also relates to a metal case; And the antenna module mounted on the metal case.

Herein, the mobile terminal can be applied to any conventional terminal device known in the art without limitation, such as a mobile phone, a smart phone, a digital broadcasting terminal, a personal digital assistant (PDA), a personal multimedia player, PMP), navigation, and laptop computer. And is preferably a terminal having a full metal body.

On the other hand, Tables 1 and 2 show changes in the contact resistance of the second contact portion according to the change of the average particle diameter and the pressure application time of the conductive particles contained in the anisotropic conductive portion.

At this time, the contact resistance means an electrical resistance generated on the contact surface of the two conductors which are in contact with each other, that is, when a current flows through the contact surface between the conductor line of the flexible flexible cable and the second contact portion connected to the anisotropic conductive portion.

In the present invention, it was found that the contact resistance of the second contact portion was 0.7 Ω or less as the average particle diameter and the pressure application time of the conductive particles constituting the anisotropic conductive portion were changed, thereby showing excellent electrical characteristics.

Contact resistance [temperature: 190 占 폚, pressure: 0.3 MPa, time: 13 seconds] Anisotropy
Conductive part Conductive particle diameter (占 퐉) Contact Resistance (Ω) 3 4.5 5 1.3 8 0.9 10 1.1 15 1.2 20 1.2

Contact resistance [temperature: 190 占 폚, pressure: 0.3 MPa, conductive particle diameter: 5-20 占 퐉] Anisotropy
Conductive part Pressure application time (sec) Contact Resistance (Ω) 7 1.8 13 0.7 20 0.5 25 0.4 30 0.5 40 Fail

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100, 200, 300: Antenna module
10: non-magnetic substrate
11, 320: a first antenna pattern portion
12: Insulating adhesive layer
20, 310: magnetic sheet
30: Flexible flat cable
40, 350: second contact portion (anisotropic conductive portion)
50, 330: first contact part
340: second antenna pattern portion
60: Protective layer

Claims (18)

Magnetic sheet;
A non-magnetic substrate disposed on one surface of the magnetic sheet and having a first antenna pattern portion; And
And a second antenna pattern portion disposed on the other surface of the magnetic sheet and having a plurality of conductor lines arranged in a plane and straight line,
Wherein the first antenna pattern part and the second antenna pattern part are electrically connected to each other. The method according to claim 1,
Wherein the non-magnetic substrate is a flexible copper-clad laminate (FCCL) or a flexible printed circuit board (FPCB) in which a copper foil layer and an insulating adhesive layer are laminated. The method according to claim 2, wherein
Wherein the plurality of conductor lines formed by etching the copper foil layer are arranged in a linear line shape along the longitudinal direction of the magnetic sheet. The method according to claim 1,
Wherein the second antenna pattern portion is arranged such that a plurality of conductor lines coated with an insulating film are parallel to each other in a direction in which the longitudinal direction of the magnetic sheet intersects. The method according to claim 1,
Wherein the first antenna pattern portion and the second antenna pattern portion are each larger than the size of the magnetic sheet and surround the magnetic sheet. 6. The method of claim 5,
A first contact portion is provided at an end of a first antenna pattern portion protruding outside the magnetic sheet,
A second contact portion is provided at an end of a second antenna pattern portion protruding outside the magnetic sheet,
And the first contact portion and the second contact portion are electrically connected to each other. The method according to claim 6,
The first contact portion includes at least one connection portion penetrating the non-magnetic substrate in the longitudinal direction,
The second contact portion includes an anisotropic conductive portion exposed on a plurality of conductor lines covered with an insulating film of the flexible flat cable and disposed on the exposed conductor line,
Wherein the first contact portion and the second contact portion are electrically connected by physical contact between the connection portion and the anisotropic conductive portion. 8. The method of claim 7,
Wherein the anisotropic conductive portion is selected from the group consisting of an anisotropic conductive film (ACF), an anisotropic conductive paste (ACP), and an anisotropic conductive adhesive (ACA). 8. The method of claim 7,
Wherein the anisotropic conductive portion comprises a plurality of conductive particles having an average particle diameter of 5 to 20 占 퐉 and a binder resin and connected via the plurality of conductive particles arranged in the thickness direction,
Wherein the value of the contact resistance (?) Of the anisotropic conductive portion after being held at a temperature of 190 占 폚 and a pressure of 0.3 MPa for 13 to 30 seconds is 0.7? Or less. The method according to claim 1,
The flexible flat cable
(i) a single-sided insulation film in which a plurality of conductor lines, an adhesive layer and a resin layer are sequentially laminated, or
(ii) a double-sided type insulating film in which an adhesive layer and a resin layer are sequentially stacked on upper and lower surfaces of a plurality of conductor lines, respectively. The method according to claim 1,
And an insulating adhesive layer between the magnetic sheet and the flexible flat cable. 12. The method of claim 11,
Wherein the insulating adhesive layer is selected from the group consisting of epoxy resin, and polyimide. The method according to claim 1,
Wherein the magnetic sheet is a sheet or a thin metal plate including a magnetic powder and a polymer resin. 14. The method of claim 13,
Wherein the magnetic powder is selected from the group consisting of magnetic metal powder, metal flake, and ferrite. The method according to claim 1,
Wherein the antenna module further comprises a protection layer covering the first antenna pattern portion disposed at the outermost portion. 16. The method of claim 15,
Wherein the protective layer is a coverlay film or a release film. The method according to claim 1,
Wherein the antenna module includes at least one antenna pattern of a magnetic security transmission (MST) antenna pattern, a wireless charging (WPC) antenna pattern, and a short-range wireless communication (NFC) antenna pattern. Metal case; And
The antenna module according to any one of claims 1 to 17, which is mounted on the metal case
To the mobile terminal.

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