KR101580574B1 - Method for manufacturing antenna of mobile communication device and mobile communcation device having antenna produced by the same - Google Patents

Abstract

A method of manufacturing an antenna for a mobile communication terminal according to the present invention includes: fabricating a base to form a case of a mobile communication terminal; Drilling a microhole through the base; Forming a conductive pattern on the penetrating portion of the fine holes and around the fine holes; And forming a coating surface on the surface of the conductive pattern and the base.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing an antenna for a mobile communication terminal, and a mobile communication terminal having an antenna manufactured by the method.

The present invention relates to a method of manufacturing an antenna for a mobile communication terminal in which a radiation pattern is formed on a battery cover or a case, and a mobile communication terminal having the antenna manufactured by the method.

A mobile communication terminal is a portable device having a function of storing information, inputting / outputting information, and data, centering on a call / message transmission / reception function, while being portable. Thanks to the rapid development of information technology and electronic industry, mobile communication terminals are becoming one of the essential personal personal items of modern people equipped with various functions such as cameras, music and video playback, games, and TV.

An external antenna, which is exposed to the outside of the terminal, was developed first, but the internal antenna mounted on the mobile communication terminal has been replaced with an internal antenna having fewer problems of damage while improving the beauty. Various types of built-in antennas have been developed depending on the type of antenna, manufacturing method, material, position, and the like. In accordance with the slimness and miniaturization of the terminal, the antenna embedded therein has a complicated condition such as securing a space and a space for realizing communication quality from the viewpoint of design, overcoming influence from other parts becoming closer and becoming higher density, The difficulty also increases because it has to be met.

A method of forming a substrate or a carrier for supporting an antenna pattern on a battery cover or a rear case or the like instead of separately fabricating a method for overcoming the restriction of installing the antenna and extending the function of the mechanism has been proposed.

The LDS (Laser Direct Structure) antenna or the CPA (Conductive Print Antenna) is a method of forming the antenna pattern, as compared with the method of using a metal mold for injection, in which the rear case is easily reproduced and the pattern shape is relatively free to implement. It is expanding.

In the case where the antenna pattern is formed on the inner surface of the case, connection between the antenna pattern and the inner circuit board and covering of the antenna from the outside may not be a problem. However, when the antenna pattern is formed on the outer surface of the case, a portion for connection with the circuit board or marks of the surface treatment may remain. This may lead to poor appearance, so it is desirable to minimize this at the manufacturing stage.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a mobile communication terminal in which a radiation pattern is formed on a battery cover or a case, So as to improve the appearance and the manufacturing quality by preventing the mark from being visible from the outside.

Another object of the present invention is to minimize the damage of the antenna from external impact or scratches.

According to an aspect of the present invention, there is provided a method of manufacturing an antenna for a mobile communication terminal, the method including: fabricating a base to form a case of the mobile communication terminal; Drilling a microhole through the base; Forming a conductive pattern on the penetrating portion of the fine holes and around the fine holes; And forming a coating surface on the surface of the conductive pattern and the base.

As an example related to the present invention, in the step of manufacturing the base to form the case of the mobile communication terminal, the base may be formed by injection molding resin.

In one embodiment of the present invention, the step of fabricating the base to form the casing of the mobile communication terminal may further include forming a stepped groove for receiving the conductive pattern at a portion where the conductive pattern is to be formed .

As a related example of the present invention, the step of fabricating the base for forming the casing of the mobile communication terminal includes a step of forming depressed grooves on the inner surface of the base so as to reduce the thickness of the base, As shown in FIG. In this case, the thickness of the bottom surface of the recessed groove may be 0.6 mm or less.

As an example related to the present invention, the fine holes may be drilled by a laser.

As an example related to the present invention, in the step of perforating the fine holes passing through the base, the fine holes may be formed to have a diameter of 0.05 mm or less.

As an example related to the present invention, in the step of perforating the fine holes passing through the base, the fine holes may be formed to have a diameter of 0.03 mm or less.

In one embodiment of the present invention, in the step of forming the conductive pattern on the inner wall of the fine hole and around the fine hole, the fine hole may be formed to fill the conductive pattern.

In one embodiment of the present invention, in the step of perforating the fine holes passing through the base, the fine holes may be formed in a plurality of adjacently arranged shapes.

In one embodiment of the present invention, the step of forming the conductive pattern on the penetrating portion of the fine holes and the fine holes may further include the step of forming an active layer by irradiating a laser beam on a portion to be formed with the conductive pattern, The conductive pattern can be formed by plating a conductive metal on the active layer.

In one embodiment of the present invention, the step of forming the conductive pattern on the penetrating portion of the fine holes and around the fine holes includes the steps of: forming a copper (Cu) plating layer on the active layer; And forming a nickel (Ni) plating layer on the surface of the copper plating layer so as to protect the copper plating layer.

As an example related to the present invention, in the step of forming the coating surface on the surface of the conductive pattern and the base, the coating surface may be a paint layer including a pigment.

As an example related to the present invention, in the step of forming the coating surface on the surfaces of the conductive pattern and the base, the coating may be formed to cover the fine holes by the coating surface.

A mobile communication terminal according to the present invention includes a case having an antenna connected to an internal circuit board, the case having a recessed groove for reducing a thickness on an inner side thereof, A base having a through hole formed therein; A conductive pattern formed around the through hole of the fine hole and the fine hole; And a coating surface formed on a surface of the conductive pattern and an outer surface of the base.

According to the method for manufacturing an antenna for a mobile communication terminal according to the present invention, the fine holes are easily hidden by a conductive pattern or a coated surface, In addition, since no mark is formed, the appearance of the mobile communication terminal can be improved.

According to the embodiment of the present invention, since the micro hole is formed by the laser after the base is formed first, the size of the fine hole can be made sufficiently small compared with the case of being formed by injection, A mobile communication terminal can be obtained.

According to another embodiment of the present invention, the stepped groove is formed first in the region where the conductive pattern is to be formed and the conductive pattern is formed in the stepped groove, so that the coated surface can be perfectly flat.

According to another embodiment of the present invention, a plurality of fine holes are formed, and conduction between the inner surface and the outer surface of the base is completed and stable when the conductive pattern is formed.

1 is a front perspective view showing an example of a mobile communication terminal 100 to which an antenna related to the present invention can be applied.
FIG. 2 is a rear perspective view of the mobile communication terminal 100 of FIG.
3 is a flowchart illustrating a method of manufacturing an antenna for a mobile communication terminal according to the present invention.
FIGS. 4 to 8 are conceptual diagrams illustrating a method of manufacturing an antenna for a mobile communication terminal according to the present invention,

Hereinafter, a method of manufacturing an antenna for a mobile communication terminal according to the present invention and an antenna manufactured thereby will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front perspective view showing an example of a mobile communication terminal 100 to which an antenna related to the present invention can be applied, and FIG. 2 is a rear perspective view of the mobile communication terminal 100 of FIG.

The mobile communication terminal according to the present invention is a mobile device. Typically, the mobile communication terminal may include a mobile phone, a smart phone, and the like. In addition, various portable devices such as a tablet PC, a notebook computer, and a palmtop computer may be included. The mobile communication terminal 100 illustrated in FIGS. 1 and 2 has a display 101 disposed on a front surface thereof for touch input or video output, a key input unit 102 for inputting a key on one side of the display 101, An audio output unit 103, cameras 104 and 106, a sensor 105, and the like. These are for input / output or user interface, and functions are implemented in relation to various functions of the mobile communication terminal 100, that is, transmission / reception of a call, message, or application program. However, some of these functional elements may be omitted or new elements may be added according to the mobile communication terminal 100.

In terms of mechanism, the mobile communication terminal 100 includes a case 120 for supporting internal components in addition to the display 101 on the front side. A battery cover for mainly replacing the battery may be provided on the rear surface of the case 120. The case 120 may be divided into a plurality of elements, and in some cases, the front case and the rear case may be formed, or an intermediate case may be added. In any case, as shown in Fig. 2, the antenna 120 related to the present invention may be formed in the case 120. [

Hereinafter, a method of forming the antenna 200 related to the present invention in the case 120 will be described in detail. 3 is a flowchart illustrating a method of manufacturing an antenna for a mobile communication terminal according to the present invention.

First, a base is formed to form a case of the mobile communication terminal (S110). The base can be manufactured by injecting resin, and a double injection method can be used to fix other parts or metal elements.

Next, fine holes are formed in the base (S120). The fine holes are formed to have a size of several tens of micrometers using precision equipment such as a laser. The fine holes are utilized as an element for connecting the conductive pattern to be formed later with the contact pad inside, but are also used for forming the clean surface of the case 120 by being filled with conductive pads or the like.

After the fine holes are formed, a conductive pattern is formed around the fine holes (S130). The conductive pattern may have various shapes and lengths depending on the bandwidth required by the mobile communication terminal or whether additional wireless elements are mounted. As one such example, the conductive pattern may have a certain pattern or location for implementing mobile communications, short range wireless communications, or a ground-based antenna. In forming the conductive pattern, a plurality of fine holes may be formed in order to prevent the conductive pattern from being filled into the small-diameter fine holes or from lowering the stability of the electrical connection.

After the conductive pattern is formed, a coating surface is formed on the outer surface of the base (S140). The coated surface covers the conductive pattern to prevent damage to the conductive pattern from external impact or scratches, while providing the base with color or gloss to complete the design.

FIGS. 4 to 8 are conceptual diagrams showing a method of manufacturing an antenna for a mobile communication terminal according to the present invention.

Fig. 4 shows a base 121 for forming the case 120. Fig. The lower surface of the base 121 faces toward the inside of the mobile communication terminal 100 and the upper surface is exposed to the outside. In the step of fabricating the base 121, a stepped groove 122 may be formed to receive the conductive pattern 201 at a portion where the conductive pattern 201 to be formed after the base 121 is to be formed. The stepped groove 122 may have an intaglio depth of several tens or several hundreds of micrometers to the extent that the conductive pattern 201 can be accommodated in the process of injecting the base 121. [ The base 121 can be obtained by molding a platable resin by injection or double injection or the like.

The depression grooves 123 may be formed such that the thickness of the portion for forming the fine holes 125 to be formed later may be thinner than the other portions when the base 121 is formed. The depression grooves 123 may be formed in a cone shape so that the plating layer is easily attached when the conductive pattern 201 is formed by plating. The thickness of the bottom surface of the depression grooves 123 may be 0.6 mm or less or 0.4 mm or less.

FIG. 5 shows a fine hole 125 formed in the base 121 as shown in FIG. The fine hole 125 is an element for electrically connecting the conductive pattern 201 to be formed on the outer surface of the base 121 and the conductive pattern 201 and the contact pad 124 on the inner surface of the base 121, The recessed groove 123 having a high margin to leave a mark is not completely penetrated, but is formed in a fine hole shape for electrical connection. The fine holes 125 may be formed by a laser, in which case the diameter may be 0.05 mm or less or 0.03 mm or less. Thus, the fine holes 125 are relatively small and therefore easily obscured by the conductive pattern 201 or the coating surface 126, and are useful for forming a clean surface of the base 121. The active layer can be formed by irradiating the bottom surface of the stepped groove 122 in which the conductive pattern 201 is to be formed so that the later-described conductive pattern 201 can easily be formed by plating. The base 121 can be plated by the formation of the active layer.

6 shows that the conductive pattern 201 is plated to fill the stepped groove 122 and the fine holes 125 after the fine holes 125 are formed. Through this process, the conductive pattern 201 on the outer surface of the base 121 is connected to the contact pad 124 on the inner surface via the fine holes 125. In the plating, first, a copper (Cu) plating layer is formed on the active layer, and a nickel (Ni) plating layer is formed on the copper plating layer to protect the copper plating layer. In the process of copper plating or nickel plating, the fine holes 125 are filled or a plating layer is formed on the inner wall. On the other hand, the portion of the conductive pattern 201 related to radiation can be deformed into an arbitrary shape or shape by a method such as printing.

7 shows a state in which a coating surface 126 is formed on the outer surface of the base 121 and the surface of the conductive pattern 201 to protect the inner conductive pattern 201 after the conductive pattern 201 is formed. Coating surface 126 may include a pigment, polish, and the like. In the process of forming the coating surface 126, the conductive pattern 201 has a clean finish surface so as not to be distinguished from the outside. The coating surface 126 may be implemented through a paint color that is repeated a plurality of times (e.g., 3 degrees or 4 degrees). The coating surface 126 may be formed to have a thickness of 50 mu m for the ultraviolet curing agent or to have a thickness of 70 mu m for the rubber coating agent so as to have a soft feeling.

8 is a view showing a result of assembling the case 120 to the mobile communication terminal 100 by using the antenna 200 manufactured by the manufacturing method according to the present invention. That is, the antenna 200 formed on the outer surface of the case 120 is fed to the substrate via the conductive pattern 201 filled in the fine holes, the contact pad 124, and the spring contact 105. Therefore, since the antenna 200 is disposed on the outer surface of the case 120, it is possible to reduce the size of the installation space and to freely select various bands and patterns from the case 120 . Nevertheless, since the fine holes 125 are covered with the conductive pattern 201 or the coating surface 126, a clean appearance is maintained. The plurality of fine holes help to realize a stable connection state of the conductive pattern 201.

The above-described method of manufacturing an antenna for a mobile communication terminal and the mobile communication terminal having the antenna manufactured by the method are not limited to the configuration and method of the embodiments described above. The above embodiments may be constructed by selectively combining all or a part of each embodiment so that various modifications can be made.

100: mobile communication terminal 120: case
121: base 122: stepped groove
123: depression groove 124: contact pad
125: fine hole 126: coated surface
200: antenna 201: conductive pattern

Claims (15)

Fabricating a base to form a case of the mobile communication terminal;
Drilling a microhole through the base;
Forming a conductive pattern on the penetrating portion of the fine holes and around the fine holes; And
And forming a coating surface on the surface of the conductive pattern and the base,
Wherein the step of forming the conductive pattern on the penetrating portion of the fine holes and around the fine holes comprises:
Further comprising the step of forming an active layer by irradiating a laser beam on a portion to be formed with the conductive pattern,
Wherein the conductive pattern is formed by plating a conductive metal on the active layer.
The method according to claim 1,
In the step of fabricating the base to form the case of the mobile communication terminal,
Wherein the base is formed by injecting a resin.
The method according to claim 1,
The step of fabricating the base to form the case of the mobile communication terminal comprises:
And forming a stepped groove for receiving the conductive pattern on a portion where the conductive pattern is to be formed.
Claim 4 has been abandoned due to the setting registration fee. The method according to claim 1,
The step of fabricating the base to form the case of the mobile communication terminal comprises:
Further comprising the step of forming a depressed groove on the inner surface of the base to reduce the thickness of the base at a portion where the fine holes are to be drilled.
Claim 5 has been abandoned due to the setting registration fee. 5. The method of claim 4,
Wherein a thickness of the bottom surface of the recessed groove is 0.6 mm or less.
Claim 6 has been abandoned due to the setting registration fee. The method according to claim 1,
Wherein the fine holes are perforated by a laser.
Claim 7 has been abandoned due to the setting registration fee. The method according to claim 1,
In the step of perforating the fine holes passing through the base,
Wherein the fine holes are formed to have a diameter of 0.05 mm or less.
Claim 8 has been abandoned due to the setting registration fee. 8. The method of claim 7,
In the step of perforating the fine holes passing through the base,
Wherein the fine holes are formed to have a diameter of 0.03 mm or less.
Claim 9 has been abandoned due to the setting registration fee. The method according to claim 1,
In the step of forming the conductive pattern on the inner wall portion of the fine hole and around the fine hole,
And the conductive pattern is filled in the fine holes.
Claim 10 has been abandoned due to the setting registration fee. The method according to claim 1,
In the step of perforating the fine holes passing through the base,
Wherein the plurality of fine holes are formed adjacent to each other.
delete Claim 12 is abandoned in setting registration fee. The method according to claim 1,
Wherein the step of forming the conductive pattern on the penetrating portion of the fine holes and around the fine holes comprises:
Forming a copper (Cu) plating layer on the active layer; And
And forming a nickel (Ni) plating layer on the surface of the copper plating layer so as to protect the copper plating layer.
Fabricating a base to form a case of the mobile communication terminal;
Drilling a microhole through the base;
Forming a conductive pattern on the penetrating portion of the fine holes and around the fine holes; And
And forming a coating surface on the surface of the conductive pattern and the base,
In the step of forming the coating surface on the surface of the conductive pattern and the base,
Wherein the coated surface is a painted layer including a pigment.
Claim 14 has been abandoned due to the setting registration fee. 14. The method of claim 13,
In the step of forming the coating surface on the surface of the conductive pattern and the base,
And forming the micro-holes to cover the micro-holes by the coated surface.
And a case formed with an antenna that can be connected to an internal circuit board,
A base having a recessed groove formed therein for reducing the thickness thereof and having a fine hole penetrating the bottom of the recessed groove;
A conductive pattern formed around the through hole of the fine hole and the fine hole; And
And a coating surface formed on a surface of the conductive pattern and an outer surface of the base,
Wherein the coated surface is a painted layer containing a pigment.

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