WO2019013567A1

WO2019013567A1 - Functional contactor

Info

Publication number: WO2019013567A1
Application number: PCT/KR2018/007908
Authority: WO
Inventors: 임병국; 공동훈; 문지우
Original assignee: 주식회사 아모텍
Priority date: 2017-07-12
Filing date: 2018-07-12
Publication date: 2019-01-17
Also published as: KR20190007232A; KR102441830B1

Abstract

A functional contactor is provided. A functional contactor in accordance with an exemplary embodiment of the present invention comprises: an elastic conductor contacting a conductor of an electronic device; a functional element connected to the elastic conductor and having a first electrode and a second electrode on at least a part of the upper surface and the lower surface thereof, respectively; and a solder connecting the lower surface of the elastic conductor and the first electrode of the functional element. Here, the functional element is provided with a plurality of conductive vias extending from the first electrode and the second electrode.

Description

Functional Contactor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactor for an electronic device such as a smart phone, and more particularly to a functional contactor capable of improving the bonding strength of a contactor stacked by soldering on a functional device.

In recent portable electronic devices, there is an increasing tendency to adopt a metal housing to improve esthetics and robustness. Such a portable electronic device alleviates an external impact and at the same time reduces electromagnetic waves leaking from or leaking into the portable electronic device and is also excellent in electrical conductivity such as a conductive gasket or a conductive contactor for electrical contact between an antenna disposed in an external housing and an internal circuit board The elastic part is used.

However, when static electricity having an instantaneous high voltage flows through a conductor such as an outer metal housing, static electricity flows into the built-in circuit board through the conductive elastic part to break a circuit such as an IC, If the current is propagated to the external housing along the ground of the circuit and is uncomfortable or severe to the user, it may lead to an electric shock which may cause injury to the user.

A functional element for protecting the user from such static electricity or leakage current is provided together with a conductive gasket or a conductive contactor for connecting the metal housing and the circuit board, There is a need for a functional contactor having various functions for protecting a circuit in a portable electronic device or for smoothly transmitting a communication signal.

Furthermore, such a functional contactor laminates the conductive elastic part to the electrode of the functional device by soldering, wherein the junction strength between the electrode and the body of the functional device decreases toward the outer periphery of the conductive elastic part. Particularly, when the electrode of the functional device has a large area, when an impact due to external contact is applied, a large number of defective products occur due to breakage or peeling of the electrode adjacent to the conductive elastic part relatively.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a functional contactor capable of increasing a bonding strength between an electrode and a body by increasing a bonding area between an electrode and a body of a functional device.

In order to solve the above-mentioned problems, the present invention provides an electronic device comprising: a conductor having elasticity to be brought into contact with a conductor of an electronic device; A functional element connected to the elastic conductor and having a first electrode and a second electrode on at least a part of an upper surface and a lower surface, respectively; And a solder connecting the lower surface of the conductor having elasticity and the first electrode of the functional device. Here, the functional device includes a plurality of conductive vias extending from the first electrode and the second electrode.

According to a preferred embodiment of the present invention, the plurality of conductive vias may be arranged vertically symmetrically on the upper surface and the lower surface of the functional device.

As an example, the plurality of conductive vias may be arranged at equal intervals with respect to any one of a first direction and a second direction perpendicular to the first direction.

At this time, the plurality of conductive vias may be arranged at equal intervals in the first direction and the second direction.

As another example, the plurality of conductive vias may be arranged at different intervals from each other with respect to the first direction and the second direction perpendicular to the first direction.

The first electrode and the second electrode may be provided on the upper surface and the lower surface of the functional device.

Further, the elastic conductor includes: a clip-shaped contact portion which contacts the conductor of the electronic device; A bending portion having a predetermined curvature to impart an elastic force; And a terminal portion contacting the first electrode of the functional device.

At this time, the elastic conductor may further include a side wall extending vertically from the terminal portion at a long side.

Here, the side wall may extend to at least a part of the short side where the bent portion is not formed.

For example, the bent portion may extend from the terminal portion.

As another example, the bent portion may be spaced apart from the terminal portion by a predetermined distance.

The functional device may include an electric shock prevention function for blocking a leakage current of an external power source flowing from the ground of the circuit board of the electronic device, a communication signal transfer function for passing a communication signal flowing into the conductive case or from the circuit board, And an ESD protection function for passing the static electricity from the conductive case by discharging.

According to the present invention, by providing a plurality of conductive vias connected to the upper and lower electrodes of a large area in the body of the functional device, it is possible to increase the area where the electrodes and the body of the functional device are joined, The strength can be increased, and therefore, the phenomenon that the electrode of the functional device is peeled or broken from the body can be prevented, and the reliability of the product can be improved.

1 is a perspective view of a functional contactor according to an embodiment of the present invention,

Fig. 2 is a sectional view of Fig. 1,

Figure 3 is a top view of the functional device in Figure 1,

4 is a plan view showing another example of the conductive via in the functional contactor according to the embodiment of the present invention,

5 is a perspective view showing another example of a conductor having elasticity in a functional contactor according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different 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, and the same reference numerals are assigned to the same or similar components throughout the specification.

The functional contactor 100 according to an embodiment of the present invention includes a conductor 110 having an elasticity, a functional device 120, and a solder 130, as shown in FIGS.

Such a functional contactor 100 is for electrically connecting a conductive case such as an external metal case to a circuit board or a conductive bracket electrically coupled to a circuit board on one side in a portable electronic device.

At this time, the functional contactor 100 may be configured such that the elastic conductor 110 contacts the circuit board or the conductive bracket, and the functional element 120 can be coupled to the conductive case, And the functional device 120 may be coupled to the circuit board.

For example, when the functional contactor 100 is of the SMT type, i.e., is coupled through soldering, the functional element 120 is coupled to the circuit board, and if it is an adhesive layer type, , The functional device 120 may be coupled to the conductive case.

Meanwhile, the portable electronic device may be a portable terminal such as a smart phone, a cellular phone, and the like, and may be a smart watch, a digital camera, a DMB, an electronic book, a netbook, a tablet PC, Such electronic devices may comprise any suitable electronic components including antenna structures for communication with external devices.

Here, the conductive case may be an antenna for communication between the portable electronic device and an external device. Such a conductive case may be provided, for example, to partially surround or partially surround the sides of the portable electronic device.

The resilient conductor 110 is in electrical contact with the conductor of the electronic device and has an elastic force. In one example, the resilient conductor 110 may be in electrical contact with a circuit board of the electronic device, a bracket coupled to the circuit board, and a human contactable conductor, such as a case.

Here, when the conductor 110 having elasticity contacts the conductor, the conductor 110 having elasticity can be contracted toward the functional device 120 by the pressing force, and when the conductor is separated, Can be restored to its original state.

On the other hand, when the elastic conductor 110 is pressed, galvanic corrosion may occur due to a potential difference between dissimilar metals when exposed to a corrosive environment. At this time, in order to minimize galvanic corrosion, the contact area of the elastic conductor 110 can be reduced.

One side of the conductor 110 having such elasticity is in contact with the conductor of the electronic device and the other side thereof is electrically connected to the functional device 120 and the lower side thereof is formed of the long side 115a and the short side 115b. That is, the conductor 110 having elasticity may be a rectangle whose bottom surface is longer than one side of the length of one side.

The functional device 120 is electrically connected in series to the elastic conductor 110, and the first electrode 121 and the second electrode 122 are provided on at least a part of the upper surface and the lower surface, respectively.

For example, the first electrode 121 and the second electrode 122 may be provided on a top surface and a bottom surface of the functional device 120, respectively. That is, the body 120a of the functional device 120 may protrude from the first electrode 121 and the second electrode 122 to the outside.

As another example, the first electrode 121 and the second electrode 122 may be formed to have a large area in order to increase the capacity of the capacitance. That is, the first electrode 121 and the second electrode 122 may be formed over the entire upper surface and the lower surface of the functional device 120.

At this time, the first electrode 121 may be laminated with a conductor 110 having elasticity, and the second electrode 122 may be coupled to a circuit board through soldering or may be coupled to a conductor such as a conductive case by a conductive adhesive layer .

The solder 130 is used to connect the elastic conductive conductor 110 and the functional device 120 to connect the lower surface of the elastic conductive conductor 110 and the first electrode 121 of the functional device 120 do.

The solder 130 may be formed by applying a solder paste to the first electrode 121, placing the resilient conductor 110 on the solder paste in the soldering process, and then heating the melted solder paste, The lower electrode 110 and the first electrode 121 of the functional device 120 are bonded to each other so that the functional device 120 and the conductor 110 having elasticity can be coupled to each other.

Here, the bonding strength of the first electrode 121 and the second electrode 122 of the functional device 120 to the body 120a decreases toward the outer periphery. That is, the bonding strength of the first electrode 121 and the second electrode 122 to the body 120a is the smallest at the rims thereof.

If an impact such as external contact is applied to the elastic conductor 110, the impact is transmitted to the first electrode 121 of the functional device 120 coupled with the elastic conductor 110 or the body 120a Since the impact is transmitted to the second electrode 122 via the first electrode 121 or the second electrode 122, the bonding state of the body 120a with the first electrode 121 or the second electrode 122 may be adversely affected.

Since the first electrode 121 has a larger area than the lower surface of the elastic conductor 110, the first electrode 121 may be broken at the periphery of the conductor 110 having elasticity at the time of external impact, The conductive member 110 having elasticity and the functional device 120 are separated from each other.

The functional contactor 100 according to an embodiment of the present invention includes a plurality of

conductive vias

124 and 125 in which the functional device 120 extends from the first electrode 121 and the second electrode 122 It is possible to prevent breakage or peeling of the first electrode 121 and the second electrode 122.

The

conductive vias

124 and 125 are formed by forming the first electrode 121 and the second electrode 122 on the body 120a and then forming the

conductive vias

124 and 125 on the body 120a from the first electrode 121 and the second electrode 122, The groove may be formed, and the formed groove may be filled with a conductive material. Here, the

conductive vias

124 and 125 may be formed of the same metal material as the first electrode 121 and the second electrode 122.

The

conductive vias

124 and 125 are integrally formed with the first electrode 121 and the second electrode 122 so that the junction area between the first electrode 121 and the second electrode 122 and the body 120a is Not only the upper surface and the lower surface of the functional device 120 but also the direction perpendicular to the direction in which the first electrode 121 or the second electrode 122 is peeled from both sides in the body 120a It is possible to prevent breakage or peeling of the first electrode 121 or the second electrode 122 even when an external impact is applied to the functional contactor 100. [

At this time, the plurality of

conductive vias

124 and 125 may be arranged vertically symmetrically on the upper surface and the lower surface of the functional device 120 (see FIG. 2). That is, the conductive vias 124 provided in the first electrode 121 of the functional device 120 and the conductive vias 125 provided in the second electrode 122 may be provided at corresponding positions in the vertical direction.

The first electrode 121 and the second electrode 122 provide a uniform supporting force in the vertical direction by the first electrode 121 and the second electrode 122 on the upper surface and the lower surface of the functional device 120, respectively, The bonding strength between the electrode 122 and the body 120a can be further increased.

In addition, the plurality of

conductive vias

124 and 125 may provide a uniform supporting force even in the horizontal direction. For example, the plurality of

conductive vias

124 and 125 may be equally spaced with respect to any one of the first direction (a) and the second direction (b) perpendicular to the first direction (a). That is, the plurality of

conductive vias

124 and 125 may be regularly arranged at regular intervals with respect to at least one of the first direction a and the second direction b on the upper surface and the lower surface of the functional device 120 .

Furthermore, the plurality of

conductive vias

124 and 125 may be arranged at regular intervals with respect to the first direction a and the second direction b, respectively (see FIG. 3). That is, the plurality of

conductive vias

124 and 125 may be regularly arranged at equal intervals in both the first direction (a) and the second direction (b) on the upper and lower surfaces of the functional device 120.

This provides a uniform supporting force in at least one of the horizontal directions (a, b) by the first electrode 121 and the second electrode 122 on the upper surface and the lower surface of the functional device 120, respectively, The bonding strength between the first electrode 121 and the second electrode 122 and the body 120a can be further increased.

As another example, the plurality of

conductive vias

224, 224a may be arranged at different intervals from one another in the

conductive vias

224, 224a adjacent to each other in the first direction a and the second direction b (see Fig. 4). That is, the plurality of

conductive vias

224 and 224a may be formed on the upper surface and the lower surface of the functional element 120 at a different interval from the

conductive vias

224 and 224a adjacent to each other in both the first direction a and the second direction b It can be arranged irregularly.

At this time, the outermost conductive via 224a disposed in the vicinity of the edge of the first electrode 121 may be disposed at a predetermined position. That is, the outermost conductive vias 224a may be arranged at equal intervals in the first direction (a) and the second direction (b).

As described above, the plurality of

conductive vias

224 and 224a are concentrated on the outer periphery of the first electrode 121 and the second electrode 122, which may cause breakage or peeling of the first electrode 121 and the second electrode 122, The bonding strength between the first electrode 121 and the second electrode 122 and the body 120a can be further increased on the top and bottom surfaces of the functional device 120 during an external impact.

On the other hand, the elastic conductor 110 may include a contact portion 111, a bent portion 112, a side wall 114, and a terminal portion 115 (see FIGS. 1 and 2).

Here, the conductor 110 having elasticity may be a C-clip having a roughly " C-shaped " shape. Since the conductor 110 having such elasticity is in line contact or point contact, galvanic corrosion resistance can be excellent.

The contact portion 111 has a clip-like curved shape and can be in electrical contact with the conductor of the electronic device. The contact portion 111 may be disposed to protrude outward between the side walls 114.

The bent portion 112 extends from the contact portion 111 in a round shape and can have an elastic force. That is, the bent portion 112 may have a constant curvature to impart an elastic force. Here, the bent portion 112 may extend from the terminal portion 115. That is, the bent portion 112 may be disposed between the contact portion 111 and the terminal portion 115.

At this time, the bent portion 112 may be exposed to the outside of the side wall 114, and the exposed portion may include a first electrode 121 and a solder 130 on the lower side thereof so as to flow without being fixed, (See Fig. 2).

The side wall 114 extends vertically from the terminal portion 115 at the long side 115a. This side wall may extend to a portion 114a of the short side 115b where the bent portion 112 is not formed. That is, the side wall 114 is formed on both sides of the side wall 114 only at the short side 115b where the bent portion 112 is not formed, so that a space is formed between the portions 114a of the side wall 114 do. At this time, in the space between the portions 114a of the side wall 114, the contact portion 111 can flow due to the elastic force of the bent portion 112. [

As a result, the portion of the conductor 110 having elasticity can be minimized to the outside, so that it is possible to suppress the influence of external factors such as a hanging by the operator.

The terminal portion 115 corresponds to the lower surface of the elastic conductor 110 and may be formed to be connected to the lower side of the side wall 114. The terminal portion 115 may be a terminal connected to the first electrode 121 of the functional device 120 by solder 130 and electrically connected to the functional device 120.

The contact portion 111, the bent portion 112, the side wall 114, and the terminal portion 115 may be integrally formed of a conductive material having an elastic force.

Meanwhile, the functional device 120 may have a function for protecting a user or an internal circuit. In one example, the functional device 120 may include at least one of an electric shock protection device, a varistor, a suppressor, a diode, and a capacitor.

That is, the functional device 120 can block the leakage current of the external power source flowing into the conductor from the ground of the circuit board. At this time, the functional device 120 may be configured such that the breakdown voltage Vbr or the breakdown voltage thereof is larger than the rated voltage of the external power supply of the electronic device. Here, the rated voltage may be a standard rated voltage for each country, for example, 240V, 110V, 220V, 120V, and 100V.

When the conductive case has an antenna function, the first electrode 121 and the second electrode 122 provided on the upper surface and the lower surface of the functional device 120 function as a capacitor to block leakage current of the external power source And a communication signal flowing from the conductor or the circuit board can be passed.

Further, the functional device 120 can pass the electrostatic discharge (ESD) flowing from the conductive case without being broken. At this time, the functional device 120 may be configured such that the breakdown voltage Vbr thereof is smaller than the insulation breakdown voltage Vcp of the body 120a provided between the first electrode 121 and the second electrode 122 .

Accordingly, the functional contactor 100 electrically connects the conductive case and the circuit board with respect to a communication signal, an electrostatic discharge (ESD), etc., and passes the leakage current of the external power from the circuit board to the conductive case .

Meanwhile, the functional contactor 100 according to the embodiment of the present invention may have a resilient conductor 310 whose side walls are case-shaped. Hereinafter, a conductor 310 having elasticity will be described with reference to FIG.

5, the elastic conductor 310 may include a contact portion 311, a bent portion 312, a spacing portion 313, an external portion 314, and a terminal portion 315. [

Here, the conductor 310 having elasticity may be a C-clip having a roughly " C " shape. Since the conductor 310 having such elasticity is in line contact or point contact, galvanic corrosion resistance can be excellent.

The contact portion 311 has a clip-like curved shape and can be in electrical contact with the conductor of the electronic device. The contact portion 311 may be arranged in the opening 314b provided on one side of the upper surface 314a of the covering portion 314 so that the curved portion protrudes outside the opening 314b.

The bent portion 312 extends in a round shape from the contact portion 311 and can have an elastic force. That is, the bent portion 312 may have a predetermined curvature to impart an elastic force. The bent portion 312 may be connected to the contact portion 311 at one end inside the elastic conductor 310 and at the other end to the upper surface 314a between the external portions 314.

The spacing portion 313 is a space formed between the lower end of the bending portion 312 and the side wall 314c of the covering portion 314. The bent portion 312 may be spaced apart from the terminal portion 315 by a predetermined distance. That is, the spacing portion 313 separates the bent portion 312 from the terminal portion 315 so as not to constrain the bent portion 312 that provides the elastic force. Therefore, the elastic force by the contact portion 311 and the bent portion 312 may not be affected by the terminal portion 315. [

The enclosure 314 may include an upper surface 314a, an opening 314b, and a side wall 314c.

The upper surface 314a is connected to the bent portion 312 and the side wall 314c and the contact portion 311 may be arranged from the inside to the outside of the opening 314b. The opening 314b may form a space through which the contact portion 311 flows in accordance with the elastic force of the bent portion 312. [

The side wall 314c may extend vertically from the terminal portion 315 at the long side 315a. The side wall 314c may extend vertically from the terminal portion 315 at the short side 315b where the bent portion 312 is not formed.

As a result, the external portion 314 may be in the form of a case that surrounds the contact portion 311 and the end portion of the bending portion 312 so that the end portions of the contact portion 311 and the bending portion 312 are not exposed to the outside .

As a result, the portion of the elastic conductor 310 which is exposed to the outside can be minimized, so that it is possible to suppress the influence of the external elements such as the engagement by the operator.

The terminal portion 315 corresponds to the lower surface of the elastic conductive member 310 and may be formed to be connected to the lower portion of the covering portion 314. The terminal unit 315 may be a terminal that contacts the first electrode 121 of the functional device 120 and is electrically connected to the functional device 120.

The contact portion 311, the bent portion 312, the external portion 314, and the terminal portion 315 may be integrally formed of a conductive material having an elastic force.

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, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

A conductor having elasticity to contact the conductor of the electronic device;

A functional element connected to the elastic conductor and having a first electrode and a second electrode on at least a part of an upper surface and a lower surface, respectively; And

And a solder coupling the lower surface of the conductor having elasticity and the first electrode of the functional device,

Wherein the functional device comprises a plurality of conductive vias extending from the first electrode and the second electrode.
The method according to claim 1,

Wherein the plurality of conductive vias are vertically symmetrically arranged on an upper surface and a lower surface of the functional device.
The method according to claim 1,

Wherein the plurality of conductive vias are equally spaced with respect to any one of a first direction and a second direction perpendicular to the first direction.
The method of claim 3,

Wherein the plurality of conductive vias are disposed at regular intervals with respect to the first direction and the second direction, respectively.
The method according to claim 1,

Wherein the plurality of conductive vias are disposed at different intervals from each other with respect to a first direction and a second direction perpendicular to the first direction.
The method according to claim 1,

Wherein the first electrode and the second electrode are provided on the upper surface and the lower surface of the functional device.
The method according to claim 1,

The conductor having elasticity may be formed,

A clip-shaped contact portion in contact with the conductor of the electronic device;

A bending portion having a predetermined curvature to impart an elastic force; And

And a terminal portion that contacts the first electrode of the functional element.
8. The method of claim 7,

Wherein the resilient conductor further comprises a sidewall extending vertically from the terminal portion at a long side.
9. The method of claim 8,

Wherein the sidewall extends at least a portion of the short side where the bend is not formed.
8. The method of claim 7,

And the bent portion extends from the terminal portion.
8. The method of claim 7,

Wherein the bent portion is spaced apart from the terminal portion by a predetermined distance.
The method according to claim 1,

Wherein the functional device has an electric shock prevention function for blocking a leakage current of an external power source flowing from a ground of a circuit board of the electronic device, a communication signal transfer function for passing a communication signal flowing into the conductive case or from the circuit board, And a function of at least one of an ESD protection function which is passed by discharging when an electrostatic charge is inputted from the case.