WO2015005673A1

WO2015005673A1 - Antenna, manufacturing method therefor and portable terminal comprising same

Info

Publication number: WO2015005673A1
Application number: PCT/KR2014/006157
Authority: WO
Inventors: 이도형; 박종호; 정을영; 김범진; 백형일
Original assignee: 주식회사 아모텍
Priority date: 2013-07-10
Filing date: 2014-07-09
Publication date: 2015-01-15
Also published as: KR20150007074A

Abstract

Disclosed are an antenna formed such that an antenna pattern is embedded in a base layer through ultrasonic welding and hot pressing, a manufacturing method therefor, and a portable terminal comprising the same, such as a smartphone. The disclosed antenna comprises: a base layer; and an antenna pattern which is embedded in the base layer and implemented by a wire, wherein the antenna is manufactured by a method comprising the steps of: winding a wire around the base layer through ultrasonic welding so as to form the antenna pattern; and embedding the antenna pattern in the base layer by hot-pressing the antenna pattern.

Description

Antenna and manufacturing method thereof and portable terminal having same

The present invention relates to an antenna for a portable terminal, and more particularly, NFC, WPC or WPC integrated NFC antenna for implementing an antenna pattern using a wire and a method of manufacturing the same and a portable terminal having the same (ANTENNA, AND MANUFACTURING METHOD OF ANTENNA) AND PORTABLE DEVICE HAVING THE ANTENNA).

The present invention claims the benefit of the filing date of Korea Patent Application No. 10-2013-0080999 filed on July 10, 2013, the entire contents of which are incorporated herein.

With the development of technology, mobile terminals such as mobile phones, PDAs, PMPs, navigation systems, laptops, etc. are not only basic functions such as calls, video / music playback, directions, etc. Additional features are provided. Accordingly, the portable terminal is provided with a plurality of antennas for wireless communication, such as wireless internet and Bluetooth.

In addition, recently, there has been a trend to apply functions such as information exchange, payment, ticket reservation, search, etc. between terminals using short-range communication (ie, NFC) to the portable terminal. To this end, the portable terminal is equipped with a portable terminal antenna module (ie, NFC antenna module) used in the short-range communication method. In this case, the NFC antenna module used is a non-contact short-range wireless communication module using a frequency band of about 13.56 GHz as one of electronic tags (RFID) and transmits data between terminals at a close distance of about 10 cm. NFC is widely used not only for payment, but also for transmitting goods information or travel information for visitors, traffic, and access control locks in supermarkets and general stores. Prior patents related to the NFC antenna module include Korea Patent Publication No. 10-2009-0126323 (name: NFC module, in particular NFC module for mobile phone), Korea Patent Registration 10-1098263 (name: NFC loop antenna) and the like.

Currently, NFC antennas mounted on portable terminals having communication functions, such as smartphones, tablets, PDAs, and the like, are flexible circuits based on a non-stick type film (ie, PI film; for example, Kapton film, polyimide film, etc.). The substrate FPCB is mainly used.

However, when manufacturing the NFC antenna with a flexible circuit board, compared to the NFC antenna using a wire (wire), the manufacturing process is complicated, manufacturing cost is increased.

On the other hand, NFC antenna using a wire has the advantage of a simple manufacturing process, the manufacturing cost is relatively low.

However, the NFC antenna using the wire has a problem that it is difficult to secure the reliability of the antenna because it is difficult to form and maintain a constant interval of the wire when manufacturing the antenna.

In addition, the NFC antenna using the wire has a problem that the antenna performance is not maintained because the thickness of the wire becomes thin and the number of turns is not secured, causing distortion.

In addition, since the NFC antenna using the wire uses a second structure to maintain the spacing of the wire, the antenna thickness is increased, so that it is difficult to apply to a portable terminal requiring miniaturization and slimming.

The present invention has been made in view of the above, by embedding the antenna pattern implemented by the wire in the base layer, it is possible to maintain a constant spacing of the wire without using a separate second structure, the twist of the wire, etc. An object of the present invention is to provide an antenna, a method of manufacturing the same, and a portable terminal having the same.

An antenna according to an embodiment of the present invention for achieving the above object, the base layer; And an antenna pattern embedded in the base layer and implemented by wires.

The antenna pattern may be configured to be partially embedded in the base layer to be stepped or completely embedded in the surface of the base layer to maintain the same plane as the base layer.

In addition, the base layer may be made of a thermoplastic resin, preferably polyethylene terephthalate or polyvinyl chloride.

In addition, the antenna pattern may be formed by winding copper or aluminum wire in a loop or quadrangular shape.

In addition, the antenna pattern may include a first antenna pattern wound around the edge of the base layer; And a second antenna pattern wound around the first antenna pattern, wherein one of the first and second antenna patterns is a short range communication antenna pattern, and the other may be a wireless charging antenna pattern.

In addition, the present invention, the first terminal portion to which the first antenna pattern is connected and the second terminal portion to which the second antenna pattern is connected may be formed on the base layer, and both ends and the terminal portion of the antenna pattern are connected by soldering. .

Here, the first and second terminal portions may be formed on the lower surface of the base layer, and a via hole for connecting the antenna pattern and the terminal portion may be formed at the terminal portion forming position of the base layer.

On the other hand, the antenna manufacturing method for achieving the object of the present invention, a) winding the wire on the base layer to form an antenna pattern; And b) embedding the antenna pattern in the base layer.

Step a) includes applying ultrasonic waves to the antenna pattern forming position on the base layer to generate friction heat; And winding a wire at an antenna pattern forming position of the base layer in which frictional heat is generated.

Also, in step b), the wound wire may be hot pressed to embed some or all of the radial direction of the wire in the base layer.

In addition, the present invention comprises the steps of forming a terminal portion to which the antenna pattern is connected to the base layer; And soldering and connecting both ends of the terminal portion and the antenna pattern.

A portable terminal for achieving the object of the present invention, the portable terminal body; A battery pack mounted inside the portable terminal body; A back cover mounted to the rear of the mobile terminal main body; And an antenna as described above assembled to any one of a portable terminal body, a battery pack, and a back cover.

According to the present invention, by embedding the antenna pattern implemented by a wire into the base layer by using ultrasonic welding and hot pressing, it is possible to prevent a change in the gap or contact of the antenna pattern due to an external impact (for example, twisted). Since the distance between the wires constituting the antenna pattern can be kept constant, there is an effect of maintaining the antenna characteristics and reliability.

In addition, according to the present invention, since the antenna pattern is embedded in the base layer through ultrasonic welding and hot pressing, and the antenna pattern and the terminal portion are connected by soldering by electric welding, the thickness of the antenna can be minimized, so that the thin and thin end It can be applied to the portable terminal which is miniaturized very much.

In addition, the ultrasonic fusion, hot pressing and soldering process as described above is easy to apply the automated process, there is an effect that can improve the productivity and yield.

1 is a flowchart illustrating a method of manufacturing an antenna according to an embodiment of the present invention.

2 to 4 are diagrams for explaining the antenna pattern forming step of FIG.

5 is a view for explaining the antenna pattern insertion step of FIG.

6 to 9 are diagrams for explaining the terminal connection step of FIG.

10 is a view for explaining the adhesive layer and shield layer lamination step of FIG.

Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention. . First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, the antenna manufacturing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1 is a flowchart illustrating an antenna manufacturing method according to an embodiment of the present invention. 2 to 4 are diagrams for explaining the antenna pattern forming step of Figure 1, Figure 5 is a view for explaining the antenna pattern insertion step of FIG. 6 to 9 are views for explaining the terminal connection step of Figure 1, Figure 10 is a view for explaining the adhesive layer and shield layer stacking step of FIG.

First, the antenna pattern 200 is formed on the base layer 100 through ultrasonic fusion (S100). That is, the antenna pattern 200 is formed by winding the wire 220 on the base layer 100 through ultrasonic welding. This will be described below in more detail with reference to FIG. 2.

The wire 220 is formed on the base layer 100, and the ultrasonic wave is applied to the wire 220 to form the friction heat (S112). That is, friction heat using ultrasonic waves is applied to the wire 220 forming position set on the base layer 100. Accordingly, the position where the wire 220 is formed is in a state capable of plastic deformation. In this case, the base layer 100 is made of a plastic resin such as polyethylene terephthalate or polyvinyl chloride, which may be plastically deformed by the generated frictional heat.

The antenna pattern 200 is formed by winding the wire 220 at a position where the frictional heat wire 220 is formed (S114). That is, the wire 220 is wound while pressing a predetermined pressure to the position where the wire 220 is formed in the plastic deformation state. In this case, the antenna pattern 200 is formed by winding the wires 220 to have a predetermined interval between the winding wires 220. Accordingly, as shown in FIG. 3, the wire 220 forming the antenna pattern 200 has one outer peripheral portion inserted into the base layer 100, and the other side protrudes above the base layer 100. A step is formed in the wire 220 and the base layer 100. As such, by winding the wire 220 using the ultrasonic welding on the base layer 100, it is possible to secure a gap between the wires 220.

Here, as shown in FIG. 4, in the forming of the antenna pattern 200, the first antenna pattern 240 is formed on the base layer 100 through ultrasonic welding (S122), and then ultrasonic welding is performed. The second antenna pattern 260 may be formed on the base layer 100 (S124). In this case, the first antenna pattern 240 and the second antenna pattern 260 are formed to be spaced apart from each other by a predetermined interval.

Here, when the first antenna pattern 240 is used as the NFC antenna, and the second antenna pattern 260 is used as the antenna for wireless charging, the first antenna pattern 240 is formed along the outer circumference of the base layer 100. Is formed. The second antenna pattern 260 is formed in a predetermined shape (for example, a circular shape) in an upper center portion of the base layer 100, and an outer circumference portion of the second antenna pattern 260 is an inner circumference portion of the first antenna pattern 240. It is formed to be spaced apart from.

Meanwhile, when the first antenna pattern 240 is used as an antenna for wireless charging and the second antenna pattern 260 is used as an NFC antenna, the first antenna pattern 240 is predetermined in an upper center portion of the base layer 100. It is formed in the form (for example, circular). The second antenna pattern 260 is formed along the outer circumference of the base layer 100, and the inner circumference of the second antenna pattern 260 is formed to be spaced apart from the outer circumference of the first antenna pattern 240.

Next, the antenna pattern 200 is hot pressed to hot insert the antenna pattern 200 into the base layer 100 (S200). That is, the antenna pattern 200 formed on the base layer 100 is hot pressed to apply heat and pressure. Due to the heat applied through the hot pressing, a high heat is generated in the copper 220 or the aluminum wire 220 in which the antenna pattern 200 is formed, and a part of the base layer 100 melts. The antenna pattern 200 is inserted into the base layer 100 by the pressure applied to the wire 220 through hot pressing. Accordingly, as shown in FIG. 5, the step between the wire 220 and the base layer 100 is eliminated.

Next, the antenna pattern 200 is connected to the terminal 300 (S300). That is, as shown in FIG. 6, the terminal part 300 is stacked on one side of the upper part of the base layer 100, and both ends of the antenna pattern 200 are connected to the terminal part 300, respectively. In this case, as shown in FIG. 7, the antenna pattern 200 includes a first antenna pattern 240 (for example, an NFC antenna pattern) and a second antenna pattern 260 (for example, a pattern for wireless charging). ), The first terminal part 320 and the second terminal part 340 are stacked on the base layer 100, and both ends of the first antenna pattern 240 are connected to the first terminal part 320. Both ends of the second antenna pattern 260 are connected to the second terminal unit 340. In this case, terminals 300 are formed on the flexible printed circuit board FPCB through a metal mask. Both ends of the antenna pattern 200 are connected to terminals formed in the terminal unit 300 by soldering. Accordingly, the height of the soldering is formed to be low (about 0.4mm) to minimize the thickness of the antenna, it is easy to apply the automated process.

Of course, as shown in FIG. 8, the first terminal part 320 and the second terminal part 340 may be formed under the base layer 100. In this case, as shown in FIG. 9, a via hole is formed in the base layer 100, and is connected to both ends of the antenna pattern 200 formed on the base layer 100 through the falling hole. That is, a plurality of via holes are formed in the base layer 100 at positions corresponding to the first terminal portion 320 and the second terminal portion 340 formed below. Both ends of the first antenna pattern 240 formed on the base layer 100 are connected to the first terminal portion 320 through via holes corresponding to the first terminal portion 320. Both ends of the second antenna pattern 260 formed on the base layer 100 are connected to the second terminal part 340 through via holes corresponding to the second terminal part 340.

Next, the adhesive layer 400 and the shield layer 500 are laminated on the base layer 100 on which the antenna pattern 200 is formed (S400). That is, as shown in FIG. 10, the shield layer 500 is stacked on one surface of the base layer 100 on which the antenna pattern 200 is formed, and the adhesive layer 400 is stacked on the other surface. Here, the shield layer 500 is stacked on one surface (eg, the upper surface) of the base layer 100 corresponding to the main body direction of the portable terminal in which the antenna is mounted. The adhesive layer 400 is laminated on the other surface (eg, the lower surface) of the base layer 100 corresponding to the case direction of the mobile terminal.

By embedding the antenna pattern implemented as a wire into the base layer by using ultrasonic welding and hot pressing, it is possible to prevent the antenna pattern from changing due to external impact (for example, warping) or to make contact with the antenna pattern. Since the distance between the wires can be kept constant, there is an effect of maintaining the antenna characteristics and reliability.

Although a preferred embodiment according to the present invention has been described above, it is possible to modify in various forms, and those skilled in the art to various modifications and modifications without departing from the claims of the present invention It is understood that it may be practiced.

Claims

Base layer; And

And an antenna pattern embedded in the base layer and formed of a wire.
The method of claim 1,

And the antenna pattern is partially embedded in the base layer to be stepped or completely embedded in the surface of the base layer to maintain the same plane as the base layer.
The method of claim 1,

And the base layer is made of a thermoplastic resin.
The method of claim 1,

The base layer is an antenna, characterized in that consisting of polyethylene terephthalate (Polyethylene terephthalate) or polyvinyl chloride (Polyvinyl Chloride).
The method of claim 1,

The antenna pattern is formed by winding a copper or Al wire in a loop or quadrangular shape.
The method of claim 1, wherein the antenna pattern,

A first antenna pattern wound around the edge of the base layer; And a second antenna pattern wound around the inside of the first antenna pattern.

One of the first and second antenna patterns is a near field communication antenna pattern, and the other is an antenna for wireless charging.
The method of claim 6,

And a first terminal portion to which the first antenna pattern is connected and a second terminal portion to which the second antenna pattern is connected are formed in the base layer, and both ends of the antenna pattern and the terminal portion are connected by soldering.
The method of claim 7, wherein

And the first and second terminal portions are formed on a lower surface of the base layer, and a via hole for connecting the antenna pattern and the terminal portion is formed at the terminal portion forming position of the base layer.
a) winding a wire on the base layer to form an antenna pattern; And

b) embedding the antenna pattern in the base layer.
The method of claim 9,

The base layer is an antenna manufacturing method, characterized in that composed of a thermoplastic resin.
The method of claim 9,

The base layer is a method of manufacturing an antenna, characterized in that consisting of polyethylene terephthalate (polyethylene terephthalate) or polyvinyl chloride (Polyvinyl Chloride).
The method of claim 9, wherein step a) comprises:

Generating ultrasonic friction heat by applying ultrasonic waves to the antenna pattern forming position on the base layer; And

And winding a wire at an antenna pattern forming position of the base layer where frictional heat has been generated.
The method of claim 12, wherein b),

And hot pressing the wound wire to embed a portion or the entire radial direction of the wire in the base layer.
The method of claim 9,

c) forming a terminal portion to which the antenna pattern is connected to the base layer; And

d) soldering and connecting both ends of the terminal portion and the antenna pattern.
A mobile terminal body;

A battery pack mounted inside the portable terminal body;

A back cover mounted to the rear of the portable terminal main body; And

A portable terminal comprising: the antenna according to any one of claims 1 to 8, which is assembled to any one of the portable terminal body, a battery pack, and a back cover.