KR20180049944A - Functional circuit protection contactor - Google Patents

Abstract

A functional contactor is provided. The functional contactor according to an embodiment of the present invention includes a conductive elastic part which has an elastic force that is in electrical contact with any one of the circuit board of an electronic device, a bracket coupled to the circuit board, and a human contactable conductor; a substrate made of a plurality of dielectric layers; and a functional element which includes a first electrode embedded in the substrate so as to be electrically connected in series to the conductive elastic part, and a second electrode embedded in the substrate in opposition to the first electrode. Accordingly, since it is easy to manufacture and is suitable for mass production, the efficiency of a manufacturing process can be improved by reducing manufacturing cost and process time. The reliability of the product can be improved by aligning the conductive elastic part easily and combining it stably.

Description

{Functional circuit protection contactor}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a contactor for an electronic device such as a smart phone, and more particularly, to a contactor using a large-area substrate, which is easy to manufacture and mass-produced.

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 impact from the outside and simultaneously penetrates into the portable electronic device or reduces the electromagnetic waves leaked from the portable electronic device and provides an external housing and a portable electronic device for electrical contact between the antenna disposed in the external housing and the internal circuit board. A conductive elastic part such as a conductive gasket or a conductive clip is used between the internal circuit boards of the electronic device.

However, since the conductive elastic part can form an electrical path between the external housing and the internal circuit board, when static electricity having a high voltage instantaneously flows through a conductor such as an outer metal housing, the conductive elastic part Static electricity may enter the internal circuit board and cause damage to circuits such as IC. If leakage current generated by AC power is transmitted to the external housing along the ground of the circuit, it may cause discomfort to the user. It causes an electric shock which can be applied.

A protective element for protecting the user from such static electricity or leakage current is provided together with a conductive elastic part for connecting the metal housing and the circuit board. Depending on the use of a conductor such as a metal case, There is a need for a functional contactor having various functions for protecting a circuit in a device or for smoothly transmitting a communication signal.

On the other hand, in the process of bonding the conductive elastic part and the protection element by soldering, since the two parts are individually bonded, it is difficult to manufacture. Particularly, since both parts are small, It is difficult to improve it.

KR 2007-0109332A (Released Nov. 15, 2007)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a functional contactor which is easy to manufacture by realizing functional devices embedded in a substrate using a large area substrate.

Another object of the present invention is to provide a functional contactor capable of mass production by implementing a functional device in a laminated substrate and performing a soldering process using a large area substrate.

In order to solve the above-mentioned problems, the present invention provides an electronic device comprising: a conductive elastic part having an elastic force to be in electrical contact with any one of a circuit board of an electronic device, a bracket coupled to the circuit board, and a human- A substrate made of a plurality of dielectric layers; And a functional element including a first electrode embedded in the substrate to be electrically connected in series to the conductive elastic portion, and a second electrode facing the first electrode and embedded in the substrate. do.

According to a preferred embodiment of the present invention, the plurality of dielectric layers may be made of FR4 or polyimide (PI).

The plurality of dielectric layers may include a first dielectric layer disposed between the first electrode and the second electrode and a plurality of second dielectric layers disposed on the upper side of the first electrode or below the second electrode. have.

The first dielectric layer may have a dielectric constant larger than that of the plurality of second dielectric layers.

The substrate may further include: a first external electrode provided on the upper side of the plurality of sheet layers; A second external electrode provided below the plurality of sheet layers and connected to the conductive elastic portion; A first conductive via connecting the first external electrode and the first electrode; And a second conductive via connecting the second external electrode and the second electrode.

The first electrode and the second electrode may be larger than the first outer electrode and the second outer electrode, respectively.

The first electrode and the second electrode may be smaller than the first outer electrode and the second outer electrode, respectively.

The functional device may further include a gap formed between the first electrode and the second electrode.

Also, a discharge material layer may be formed on part or all of the voids.

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 transmitting function for passing a communication signal flowing into the conductive case or from the circuit board, And an ESD protection function for allowing the static electricity to pass therethrough without causing insulation breakdown upon the introduction of static electricity from the conductive case.

The conductive elastic part may be any one of a conductive gasket, a silicone rubber pad, and a clip-shaped conductor having elasticity.

In addition, the conductive elastic part may be in line contact or point contact so as to reduce galvanic corrosion.

The functional contactor may be formed by cutting a plurality of conductive elastic portions on a large-area substrate having a plurality of the functional elements, each of the plurality of conductive elastic portions being soldered on the large-area substrate, and then cutting into unit sizes.

According to the present invention, a functional device is implemented in a form embedded in a substrate using a large-area substrate, and the conductive elastic part is laminated and bonded to the substrate, which is easy to manufacture and suitable for mass production. The efficiency of the manufacturing process can be improved.

In addition, the present invention can improve the reliability of a product because the conductive elastic part can be easily aligned and stably bonded by bonding the conductive elastic part by soldering onto a large-area substrate having the functional device embedded therein.

1 is a cross-sectional view of an example of a functional contactor according to an embodiment of the present invention,
FIG. 2 is a perspective view illustrating a process in which a conductive elastic part is soldered during a manufacturing process of a functional contactor according to an exemplary embodiment of the present invention;
3 is a cross-sectional view of another example of a functional contactor according to an embodiment of the present invention,
4 is a cross-sectional view of another example of 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 conductive elastic part 110, a substrate 120, and a functional device 130, as shown in FIG.

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.

That is, the functional contactor 100 may be configured such that the conductive elastic part 110 is brought into contact with the circuit board or the conductive bracket and the substrate 120 can be coupled to the conductive case, And the substrate 120 may be bonded to the circuit board.

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

Meanwhile, the portable electronic device may be in the form of a portable electronic device that is portable and portable. For example, 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. In addition, it may be a device using local area network communication such as WiFi and Bluetooth.

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 conductive elastic part 110 is in electrical contact with any one of the circuit board of the electronic device, the bracket coupled to the circuit board, and the human contactable conductor, and has an elastic force.

Such a conductive elastic part 110 is shown and described as being a clip-shaped conductor having an elastic force in FIG. 1, but is not limited thereto, and may be a conductive gasket, or a silicone rubber pad.

Here, when the conductive elastic part 110 is in contact with the circuit board, the conductive bracket, and the conductor, the conductive elastic part 110 can be contracted toward the substrate 120 by the pressing force, If separated, it can be restored to its original state by its elastic force.

On the other hand, when the conductive elastic part 110 is pressed, galvanic corrosion occurs due to a potential difference between dissimilar metals. At this time, in order to minimize galvanic corrosion, it is preferable that the contact area of the conductive elastic part 110 is made small.

That is, the conductive elastic part 110 is not only in surface contact but also preferably in line contact and / or point contact. For example, when the conductive elastic part 110 is a conductive gasket or a silicone rubber pad, it may be surface-contacted, and in the case of a clip-shaped conductor, it may be in line contact and / or point contact.

For example, when the conductive elastic portion 110 is a clip-shaped conductor, the clip-shaped conductor includes the contact portion 111, the bent portion 112, and the terminal portion 113.

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

The contact portion 111 has a curved shape and can be in electrical contact with either the circuit board or the conductive bracket, and the conductive case. The bent portion 112 extends from the contact portion 111 and can have an elastic force. The terminal portion 113 may be a terminal electrically connected to the substrate 120.

The contact portion 111, the bent portion 112, and the terminal portion 113 may be integrally formed of a conductive material having an elastic force.

The substrate 120 is composed of a plurality of dielectric layers 121 to 123. For example, the substrate 120 may be composed of three dielectric layers 121 to 123. The dielectric layer 121 is disposed on the lowermost portion of the substrate 120. The dielectric layer 122 is disposed on the upper side of the dielectric layer 121 and the dielectric layer 123 is disposed on the upper surface of the dielectric layer 121. [ May be disposed on the upper side of the dielectric layer 122. Here, the plurality of dielectric layers 121 to 123 may be made of FR4 or polyimide (PI).

Alternatively, the plurality of dielectric layers 121 to 123 may be made of materials having mutually different dielectric constants. The plurality of dielectric layers 121 to 123 may include a first dielectric layer 121 disposed between the second electrodes 127 and a plurality of dielectric layers 121 disposed on the upper side of the first electrodes 126 or below the second electrodes 127. [ And the first dielectric layer 122 may have a dielectric constant larger than that of the plurality of second dielectric layers 121 and 123.

For example, the first dielectric layer 122 may be made of FR4, and the second dielectric layers 121 and 123 may be made of polyimide (PI). Here, the first dielectric layer 122 constitutes a part of the functional device 130 as described later.

The substrate 120 may have an internal pattern such that the functional device 130 is electrically connected to the conductive elastic part 110 in series. In one example, the substrate 120 may include a first outer electrode 124, a second outer electrode 125, a first conductive via 128, and a second conductive via 128 '.

The first external electrode 124 is provided on the dielectric layer 123 and is connected to the conductive elastic part 110. Here, the first external electrode 124 may be coupled to the conductive elastic part 110 through a solder (not shown). In this case, the first external electrode 124 is illustrated as being provided on a part of the upper surface of the dielectric layer 123, but the present invention is not limited thereto and may be provided on the entire upper surface of the dielectric layer 123.

The second external electrode 125 is provided on the lower side of the dielectric layer 121 and can be coupled to the circuit board of the portable electronic device through soldering or to the conductive case through the conductive adhesive layer. The second external electrode 125 may be provided on a lower surface of the dielectric layer 121. The second external electrode 125 may be formed on a lower surface of the dielectric layer 121,

The first conductive vias 128 may be formed to penetrate the dielectric layer 121 in the vertical direction so as to connect the first external electrode 124 and the first electrode 126. The first conductive via 128 may be formed by forming a via hole in the dielectric layer 121 and filling the formed via hole with a conductive material.

The second conductive via 128 'may be formed to penetrate the dielectric layer 123 in the vertical direction so as to connect the second external electrode 125 and the second electrode 127. The second conductive via 128 'may be formed by forming a via hole in the dielectric layer 123 and filling the formed via hole with a conductive material.

Meanwhile, the substrate 120 may serve as a guide as a medium for fixing the conductive elastic part 110 and the functional device 130 and coupling the conductive elastic part 110 and the functional device 130 to the conductive case. That is, the substrate 120 can provide stable bonding through the conductive adhesive layer or the like even when soldering is difficult when the conductive elastic part 110 and the functional device 130 are coupled.

The functional element 130 is embedded in the substrate 120 so as to be electrically connected in series to the conductive elastic part 110. That is, the functional device 130 may be electrically connected in series to the conductive elastic part 110 through the first conductive via 128 and the first external electrode 124 of the substrate 120.

Here, the functional device 130 may have a function for protecting a user or an internal circuit. In one example, the functional device 130 may include at least one of an electric shock protection element, a varistor, a suppressor, a diode, and a capacitor.

That is, the functional device 130 can block the leakage current of the external power source flowing from the ground of the circuit board of the electronic device. At this time, the functional device 130 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.

In addition, when the conductive case has an antenna function, the functional device 130 functions as a capacitor to cut off a leakage current of an external power source and to pass a communication signal flowing from a conductor or a circuit board.

Further, the functional device 130 can pass the static electricity (ESD) flowing from the conductive case without being broken. At this time, the functional device 130 may be configured such that the breakdown voltage Vbr thereof is smaller than the insulation breakdown voltage Vcp of the first dielectric layer 122.

Accordingly, the functional contactor 100 can block the leakage current of the external power source from the circuit board from being transmitted to the conductive case by electrically connecting the conductive case and the circuit board to the communication signal, the electrostatic discharge (ESD) .

The functional element 130 includes, for example, a first electrode 126, a second electrode 127, and a first dielectric layer 122, as shown in FIG.

The first electrode 126 is embedded in the substrate 120 so as to be electrically connected to the conductive elastic part 110. That is, the first electrode 126 may be disposed on the dielectric layer 122 and connected to the conductive elastic part 110 through the first conductive via 128 and the first external electrode 124.

The second electrode 127 is embedded in the substrate 120 in opposition to the first electrode 126. That is, the second electrode 127 may be disposed on the dielectric layer 121 and connected to the second external electrode 125 through the second conductive via 128 '.

The first electrode 126 and the second electrode 127 may be larger than the first external electrode 124 and the second external electrode 125 in order to increase the capacitance, (124) and the second external electrode (125), respectively.

The first dielectric layer 122 is provided between the first electrode 126 and the second electrode 127. That is, the first dielectric layer 122 may be disposed between the second dielectric layers 121 and 123. The dielectric constant of the first dielectric layer 122 may be larger than that of the second dielectric layers 121 and 123 provided on the upper and lower sides of the first dielectric layer 122. For example, the first dielectric layer 122 may be made of FR4, and the second dielectric layers 121 and 123 may be made of polyimide (PI).

Here, the functional element 130 has a dielectric constant of the first dielectric layer 122, a dielectric constant of the first electrode 122, and a dielectric constant of the first dielectric layer 122 such that the internal pressure of the functional element 130 is larger than the rated voltage of the external power source of the electronic device, 126 and the second electrode 127, and the respective areas.

The functional element 130 configured as described above can prevent damage to the user or damage to the internal circuit such as electric shock through a conductor such as a conductive case. For example, when the functional device 130 flows from the ground of the circuit board of the electronic device, since the internal pressure between the first electrode 126 and the second electrode 127 is larger than the rated voltage of the external power supply, It is possible to cut off the leakage current without passing the leakage current.

In addition, when the communication signal is input from the conductor or the circuit board, the functional device 130 may function as a capacitor to perform a communication signal transfer function.

In addition, when the electrostatic discharge (ESD) flows from the conductor, the functional element 130 has a higher breakdown voltage between the first electrode 126 and the second electrode 127 than the breakdown voltage therebetween, Electrostatic discharge (ESD) can be passed. Such an electrostatic discharge (ESD) is configured to be transmitted to the ground portion of the circuit board, thereby protecting the internal circuit.

Since the functional device 130 is embedded in the substrate 120 as described above, it is possible to manufacture the functional device 130 using only a simple substrate formation process as compared with a conventional functional device made of a ceramic material. Can be suitable for mass production. Therefore, the manufacturing cost and the process time can be shortened, and the efficiency of the manufacturing process can be improved.

Such a functional contactor 100 can be manufactured using a large area substrate. For example, the functional contactor 100 includes a plurality of functional elements 130 formed by embedding a plurality of first electrodes 126 and a plurality of second electrodes 127 on a large-area substrate 120a, Each of the elastic portions 110 may be formed on the large-area substrate 120a by being soldered and cut to a unit size.

The manufacturing process of the functional contactor 100 will be described in detail with reference to FIG.

First, a large-area substrate 120a corresponding to each of the plurality of dielectric layers 121 to 123 can be formed. Here, the plurality of dielectric layers 121 to 123 may be sequentially stacked. That is, the first dielectric layer 122 having the first electrode 126 is disposed on the second dielectric layer 121 having the second electrode 127, and the first dielectric layer 122 is formed on the first dielectric layer 122, The second dielectric layer 123 may be disposed on the substrate 120 so that the functional device 130 is embedded in the substrate 120.

As described above, by implementing the functional device 130 on the substrate 120 by using the large-area substrate 120a, it is easy to manufacture and can be mass-produced. Furthermore, since the functional device 130 is realized in the process of forming the substrate 120, the process can be simplified as compared with the case where the functional device 130 is coupled to the guide.

As shown in FIG. 2, the conductive elastic part 110 may be coupled to the large-area substrate 120a including the plurality of dielectric layers 121 through 123 by soldering, .

That is, the first outer electrode 124 is exposed to the outside on the upper surface of the large-area substrate 120a on which the functional device 130 is embedded, and a plurality of conductive elasticities The conductive elastic part 110, the substrate 120, and the functional device 130 can be integrally formed by soldering the conductive part 110. [

Since the plurality of conductive elastic portions 110 are soldered on the plurality of first external electrodes 124 on the large area substrate 120a through the solder in this way, the number of the conductive elastic portions 110 Alignment and soldering can be performed easily and accurately, thereby improving the reliability of the product as well as the efficiency of the manufacturing process.

At this time, by cutting the large-area substrate 120a along the cut line 120b having the unit size, the unit functional contactor 100 can be mass-produced.

As described above, since the plurality of functional devices 130 can be buried and the conductive elastic part 110 can be soldered in large quantities using the large area substrate 120a, it is possible to mass-produce the functional contactor 100 .

3, the functional device 330 includes a first electrode 126 and a second electrode 127 (not shown). The functional device 330 includes a first electrode 126 and a second electrode 127, A gap 329 may be formed between the first and second electrodes.

At this time, a discharge material layer may be formed on part or all of the void 329. In one example, the voids 329 may be filled with a layer of a discharge material or coated or coated along the inner wall. Here, the discharge material constituting the discharge material layer has a low dielectric constant, low conductivity, and no short circuit when an overvoltage is applied.

To this end, the discharge material may be made of a nonconductive material including at least one kind of metal particles, and may be made of a semiconductor material containing SiC or a silicon-based component.

For example, when the first electrode 126 and the second electrode 127 include an Ag component, the discharge material may include a SiC-ZnO based component. Here, the discharge material includes SiC-ZnO based materials as an example of the discharge material, but the present invention is not limited thereto. The discharge material may be a semiconductor material or a semiconductor material suitable for components constituting the first electrode 126 and the second electrode 127 Nonconductive materials including metal particles may be used

4, the first electrode and the second electrode may be smaller than the first external electrode 124 and the second external electrode 125, respectively.

That is, the first electrode 426 and the second electrode 427 are formed so as to overlap each other depending on the magnitude of the capacitance to be formed, 2 external electrodes 125, respectively.

When the functional elements 330 and 430 constituted as described above are introduced from the ground of the circuit board of the electronic device, the breakdown voltage Vbr between the first electrode 126 and the second electrode 127 and the second electrode 127 is equal to the rated voltage The leakage current of the external power supply can be cut off without passing through.

In addition, the functional devices 330 and 430 may function as a capacitor to perform a communication signal transfer function when a communication signal is input from a conductor or a circuit board.

In addition, when the functional devices 330 and 430 are introduced from the conductor, the electrostatic ESD can pass through the gap 329 between the first electrode 126 and the second electrode 127 and the second electrode 127 without insulation breakdown. Such an electrostatic discharge (ESD) is configured to be transmitted to the ground portion of the circuit board, thereby protecting the internal circuit.

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.

100: Functional Contactor 110: Conductive Elastic Portion
120, 320, 420: substrates 121 to 123:
124: first outer electrode 125: second outer electrode
126, 426: first electrode 127, 427: second electrode
128: first conductive via 128 ': second conductive via
329: cavity 130, 330, 430:
120a: large area substrate 120b: cutting line

Claims (13)

A conductive elastic part having an elastic force that is in electrical contact with any one of a circuit board of the electronic device, a bracket coupled to the circuit board, and a human-contactable conductor;
A substrate made of a plurality of dielectric layers; And
A functional element including a first electrode embedded in the substrate so as to be electrically connected in series to the conductive elastic portion, and a second electrode embedded in the substrate in opposition to the first electrode. The method according to claim 1,
Wherein the plurality of dielectric layers are made of FR4 or polyimide (PI). The method according to claim 1,
Wherein the plurality of dielectric layers includes a first dielectric layer disposed between the first electrode and the second electrode, and a plurality of second dielectric layers disposed on the upper side of the first electrode or below the second electrode. . The method of claim 3,
Wherein the first dielectric layer has a dielectric constant larger than that of the plurality of second dielectric layers. The substrate processing apparatus according to claim 1,
A first external electrode provided on the plurality of sheet layers;
A second external electrode provided below the plurality of sheet layers and connected to the conductive elastic portion;
A first conductive via connecting the first external electrode and the first electrode; And
And a second conductive via connecting the second external electrode and the second electrode. 6. The method of claim 5,
Wherein the first electrode and the second electrode are each larger than the first and second outer electrodes. 6. The method of claim 5,
Wherein the first electrode and the second electrode are each smaller than the first external electrode and the second external electrode. The method according to claim 1,
Wherein the functional element further comprises a gap formed between the first electrode and the second electrode. 9. The method of claim 8,
And a layer of a discharge material is formed on part or all of the void. 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 transmitting 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 for allowing the static electricity to pass therethrough without causing insulation breakdown upon introduction of static electricity from the conductive case. The method according to claim 1,
Wherein the conductive elastic portion is any one of a conductive gasket, a silicone rubber pad, and a clip-shaped conductor having elasticity. The method according to claim 1,
Wherein the conductive elastic portion is in line or point contact to reduce galvanic corrosion. The method according to claim 1,
Wherein the functional contactor is formed by cutting a plurality of electrically conductive elastic portions on a large-area substrate having a plurality of functional elements, each of the plurality of electrically conductive elastic portions being soldered on the large-area substrate and then cut to a unit size.

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