KR20170060878A

KR20170060878A - Circuit protection contactor and mobile electronic device with the same

Info

Publication number: KR20170060878A
Application number: KR1020150165609A
Authority: KR
Inventors: 임병국; 최윤석; 황윤호; 최재우; 박규환
Original assignee: 주식회사 아모텍
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2017-06-02

Abstract

There is provided an electric shock protection contactor and a portable electronic device having the contactor. An electric shock protection contactor according to an exemplary embodiment of the present invention includes: an electric shock protection device for interrupting a leakage current of an external power source flowing from a ground of a circuit board of an electronic device; And a pair of foam-type members each of which is disposed symmetrically symmetrically with respect to the electric shock protection element, has elasticity, and electrically connects the electric shock protection element and the electric conductor of the electric device and the electric shock protection element with the circuit board in series. And a conductive connection portion. According to this, it is possible to prevent damage to the user such as electric shock through the conductor or breakage of the internal circuit, achieve miniaturization of the portable electronic device, reduce the manufacturing cost, and improve the stability of the contact and the service life have.

Description

TECHNICAL FIELD [0001] The present invention relates to a contactor for protecting an electric shock, and a portable electronic device having the contactor.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shock protection contactor and a portable electronic device having the same, and more particularly, to an electric shock protection contactor capable of protecting a user from a leakage current by a power source and a portable electronic device having the same.

[0003] In recent portable electronic devices, various component elements are densely arranged in the interior in accordance with miniaturization and multifunctionalization. Therefore, conductive foams are used between the external housing and the built-in circuit board of the portable electronic device to reduce electromagnetic waves that leak from the portable electronic device while penetrating into the portable electronic device while alleviating the impact from the outside.

In addition, the portable electronic device may have a plurality of antennas for each function in accordance with the multifunctional function, and at least a part thereof may be an internal antenna, and may be disposed in the external housing of the portable electronic device. Therefore, a conductive contactor is used for electrical contact between the antenna disposed in the external housing and the internal circuit board of the portable electronic device.

In addition, portable electronic devices have recently been increasing in adoption of housings made of metal to improve esthetics and robustness.

As a result, an electrical path can be formed between the outer housing and the internal circuit board by the conductive foam or the conductive contactor. In particular, as the metal housing and the circuit board form a loop, The static electricity flows into the built-in circuit board through the conductive foam or the conductive contactor, thereby damaging the circuit such as the IC.

On the other hand, such a portable electronic device typically uses a charger to charge the battery. Such a charger rectifies an external AC power source to a DC power source and then through a transformer to a low DC power source suitable for a portable electronic device. Here, in order to enhance the electrical insulation of the transformer, a Y-CAP composed of a capacitor is provided at both ends of the transformer.

However, when the Y-CAP does not have the normal characteristics, such as a non-genuine charger, the DC power may not be sufficiently blocked by the Y-CAP, and furthermore, a leakage current may be generated by the AC power source. Can propagate along the ground of the circuit.

Such a leakage current can be transmitted to a conductor that can be contacted with a human body as in an external case of a portable electronic device. As a result, it can give a user an unpleasant feeling of crushing. In case of severe case, There are problems that cause accidents.

Therefore, a protective element for protecting the user from such a leakage current needs to be provided in the conductive foam or the conductive contactor connecting the metal housing and the circuit board.

Further, when the metal housing is used as an antenna, the conductive foam or the conductive contactor is required to realize a high capacitance because the signal is attenuated when the capacitance is low, and the RF signal is not transmitted smoothly.

Thus, there is a need for a contactor having various functions for protecting a user or a circuit in a portable electronic device as well as a simple electrical contact according to the use of a conductor such as a metal case.

However, in order to implement these various functions, additional component elements are required. Therefore, there is a problem that miniaturization is adversely affected because additional space must be secured in the circuit board of the portable electronic device.

KR 2007-0109332A (published patent application)

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric shock protection contactor capable of protecting a user or an internal circuit and a portable electronic device having the same.

It is another object of the present invention to provide an electric shock protection contactor capable of minimizing attenuation of a communication signal and capable of delivering it, and a portable electronic device having the contactor.

It is another object of the present invention to provide an electric shock protection contactor and a portable electronic device having the contactor that can uniformly disperse a pressing force externally applied to improve contact stability and service life.

According to an aspect of the present invention, there is provided an electronic device comprising: an electric shock protection device for interrupting a leakage current of an external power source that flows from a ground of a circuit board of an electronic device; And

A pair of foam type conductive members arranged in symmetry with respect to the electric shock protection element and having elasticity and electrically connecting the electric shock protection element and the electric conductor of the electric device and the electric shock protection element and the circuit board respectively in series, And a connection portion.

According to a preferred embodiment of the present invention, the electric shock protection element can pass a communication signal flowing from the electric conductor.

In addition, the electric shock protection device may allow the static electricity to pass therethrough without being destroyed by insulation when the static electricity flows from the electric conductor.

Each of the pair of foam-type conductive connection portions may be electrically contacted to the pair of external electrodes through the pair of conductive bonding layers, respectively.

Also, the electric shock protection device may have a groove portion on the upper side and a lower side, and each of the conductive connection portions of the pair of foam type may be inserted at least partly into the respective groove portions.

Also, the electric shock protection element may have a breakdown voltage (Vbr) satisfying the following equation, and [Expression] Vbr> Vin, where Vin may be provided at a rated voltage of the external power source of the electronic device.

Also, the electric shock protection element includes an electric shock protection unit and at least one capacitor layer, and the electric shock protection unit has a breakdown voltage (Vbr) satisfying the following formula: Vbr> Vin, Vcp> Vbr , Vin is the rated voltage of the external power supply of the electronic device, and Vcp is the insulation breakdown voltage of the capacitor layer.

In addition, the foam type conductive connection portion may include a plurality of bubbles including air or an inert gas.

The foam-type conductive connection portion may include at least one of paper, synthetic resin, hemp, natural rubber, synthetic rubber, asbestos, leather, copper, lead, mild steel and conductive paste.

In addition, the foam-type conductive connection part may further include a conductive member in the form of a wire and a plate formed in an oblique or vertical direction inside the conductive connection part.

Also, the electric shock protection device may include an external electrode provided on the bottom surface of each of the groove portions, and each of the pair of foam type conductive connection portions may be fixed on the external electrode through a conductive adhesive layer.

The electric shock protection element may include: a body formed by stacking a plurality of sheet layers; At least a pair of internal electrodes formed at predetermined intervals in the inside of the body; And a gap formed between the internal electrodes.

Further, the pair of internal electrodes may be arranged on the same plane.

The gap may include a layer of a discharge material applied to the inner wall at a predetermined thickness along the height direction.

The at least two varistor material layers are formed by alternately stacking a first varistor material layer and a second varistor material layer. A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer.

The breakdown voltage Vbr may be the sum of breakdown voltages formed between the first and second inner electrodes adjacent to each other.

The first internal electrode and the second internal electrode may be arranged so that at least a part of the first internal electrode and the second internal electrode do not overlap or overlap each other.

The spacing L between the plurality of first inner electrodes or between the plurality of second inner electrodes may be a distance between the shortest distance d1 between the first inner electrode and the second inner electrode, And the shortest distance d2 between the neighboring first internal electrode and the second internal electrode.

In addition, the capacitor layer may be electrically connected in parallel with the electric shock protection portion.

The gap between the capacitor layer and the electric shock protection unit may be larger than the interval between the pair of internal electrodes of the electric shock protection unit.

The electric shock protection element may include: a body formed by stacking a plurality of sheet layers; An electric shock protection unit including at least a pair of internal electrodes formed at predetermined intervals in the inside of the body, and a gap formed between the internal electrodes; And at least one laminated capacitor layer for passing the communication signal.

Further, the pair of internal electrodes may be arranged on the same plane.

The at least one varistor material layer may include at least two varistor material layers alternately stacked with a first varistor material layer and a second varistor material layer, a plurality of varistors spaced apart by a predetermined distance L on the first varistor material layer, 1 an internal electrode, and a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer; And at least one laminated capacitor layer for passing the communication signal.

The spacing L between the plurality of first inner electrodes or between the plurality of second inner electrodes may be a distance between the shortest distance d1 between the first inner electrode and the second inner electrode, May be greater than at least one of the shortest distance (d2) between the neighboring first internal electrode and the second internal electrode.

On the other hand, the present invention provides a human body comprising: a body-contactable conductor; A circuit board on which a plurality of passive elements and active elements are installed; And an electric shock protection contactor whose one end is electrically connected to the circuit board and the other end is electrically connected in series to the electric conductor, An electric shock protection device for interrupting a leakage current; And a pair of foam-type members each of which is disposed symmetrically symmetrically with respect to the electric shock protection element, has elasticity, and electrically connects the electric shock protection element and the electric conductor of the electric device and the electric shock protection element with the circuit board in series. And a conductive connection portion.

According to a preferred embodiment of the present invention, the conductor may have an electric shock protection function including at least one of an antenna, a metal case, and a conductive ornamental for communication between the electronic device and an external device.

According to the present invention, in the portable electronic device in which the conductor such as the metal case is exposed to the outside, the contactor connecting the conductor and the circuit board is provided with the electric shock protection device, so that the user's damage such as electric shock through the electric conductor, Can be prevented.

Further, since the electric shock protection device and the contactor are integrally provided, a separate device for realizing the function and an additional space of the device are not required, so that the portable electronic device can be miniaturized and the manufacturing cost can be reduced have.

Further, according to the present invention, since the conductive connection portion is arranged symmetrically with respect to the electric shock protection element, the pressing force externally applied can be uniformly dispersed, so that stability of contact and service life can be improved.

1 is a sectional view of an example in which an electric shock protection contactor is applied to a portable electronic device according to an embodiment of the present invention;
Figs. 2-4 are schematic equivalent circuit diagrams for describing operations on leakage current, electrostatic discharge (ESD), and communication signals when an electric shock protection contactor is installed in a portable electronic device according to an embodiment of the present invention; Fig.
FIG. 5 and FIG. 6 are graphs showing a simulation result of a pass frequency band based on capacitance in an electric shock protection contactor according to an embodiment of the present invention,
FIG. 7 is a cross-sectional view of a contact protection contactor including a foam-type conductive connection portion applied to a portable electronic device, according to an embodiment of the present invention;
8 is an overall perspective view showing the structure of an electric shock protection contactor including a foam type conductive connection portion and an electric shock protection element, according to an embodiment of the present invention;
9 is an exploded perspective view showing a relationship in which a plurality of sheet layers are laminated in an electric shock protection element, according to an embodiment of the present invention;
10 is a longitudinal sectional view showing another embodiment of the electric shock protection element in the electric shock protection contactor of FIG. 8,
11 is an exploded perspective view showing an embodiment of the internal electrode and the void forming member in the electric shock protection element of Fig. 10, Fig.
Fig. 12 and Fig. 13 are longitudinal sectional views showing another embodiment of the electric shock protection portion included in the electric shock protection element of Fig. 8,
14 is an exploded perspective view showing one embodiment of internal electrodes and voids in the electric shock protection element of Fig. 13, Fig.
Figs. 15 to 17 are longitudinal sectional views showing another embodiment of the electric shock protection portion included in the electric shock protection element of Fig. 8; Fig.
FIG. 18 is a perspective view showing another embodiment of the electric shock protection element in the electric shock protection contactor of FIG. 8;
Fig. 19 is a longitudinal sectional view showing the structure of a foam-type conductive connection portion and an electric shock protection element in the electric shock protection contactor of Fig. 18;

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 contactor protection contact 100 according to an embodiment of the present invention includes a first conductive connection part 110, a second conductive connection part 120, and an electric shock protection element 130.

Such an electric shock protection contactor 100 is for electrically connecting between a conductor 12 such as an external metal case and a circuit board 14 in a portable electronic device, referring to FIG.

Here, 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 Wi-Fi and Bluetooth.

The shock protection contactor 100 is urged in response to a pressing force to engage the conductor 12 with the portable electronic device so that when the conductor 12 is released from the portable electronic device, Lt; / RTI >

Here, the conductor 12 may be provided to partially surround or partially surround the side portion of the portable electronic device, and may be an antenna for communication between the portable electronic device and an external device.

The first conductive connection part 110 and the second conductive connection part 120 form a pair and are disposed symmetrically with respect to the electric shock protection device 130 in the up and down directions. For example, referring to FIG. 1, the electric shock protection element 130 is stacked on the second conductive connection part 120, and the first conductive connection part 110 is formed on the upper part of the electric shock protection element 130 The pair of conductive connecting parts 110 and 120 may be arranged symmetrically with respect to the electric shock protection device 130 in the height direction.

The pair of conductive connection portions 110 and 120 are disposed symmetrically with respect to the electric shock protection device 130 so that the pressing force externally applied through the conductor 12 or the circuit board 14 is uniformly distributed So that the stability of the contact and the service life can be improved by the pair of conductive connecting parts 110 and 120. [

Here, the first conductive connection part 110 and the second conductive connection part 120 are electrically contacted to the conductor 12 of the portable electronic device and the circuit board 14, respectively, and may have an elastic force. The pair of conductive connecting portions 110 and 120 may be provided as a foam having an elastic force (restoring force or elastic restoring force) as shown in FIG.

At this time, a part of the pair of the conductive connection parts 110 and 120 can be pressed toward the electric shock protection element 130 by the pressing force of the conductor 12 or the circuit board 14, It can be restored to its original state by its elastic force.

The electric shock protection device 130 is electrically connected in series to the first conductive connection part 110 and the second conductive connection part 120. For example, referring to FIG. 1, the pair of conductive connection parts 110 , 120). Here, a pair of external electrodes 221 and 222 (see FIG. 7) may be disposed on the upper and lower surfaces of the electric shock protection element 130, respectively.

18) is provided on the upper and lower sides of the electric shock protection device 130. A pair of external electrodes 221 'are formed on the bottom surface of the pair of the grooves 136, The first conductive connection part 110 is stacked on the external electrode 221 'through the conductive adhesive layer 111 and the second conductive connection part 120 is formed on the conductive adhesive layer 111' May be stacked on top of the external electrode 222 '. Such a structure will be described later.

At this time, the electric shock protection device 130 may be a device having a function of preventing damage to the user or damage of the internal circuit such as electric shock through a conductor, such as a metal case. For example, the electric shock protection element 130 may block the leakage current of the external power source flowing from the ground of the circuit board 14 of the electromagnetic device, may pass the communication signal coming from the electric conductor 12 , Static electricity can be passed through the conductor (12) without dielectric breakdown during the inflow of the static electricity.

To this end, the electric shock protection element 130 may include at least one of an electric shock protection element, a varistor, a suppressor, and a diode, for example. Here, the electric shock protection element may include various types of a suppressor or a varistor. That is, the electric shock protection element may be a single element such as a suppressor or a varistor. Alternatively, when the contactor for protecting the electric shock protection is required to have a function of passing a communication signal, such as when the contactor is connected to a conductor such as an antenna, the electric shock protection element 130 may be a surgeon having a capacitor layer May be a varistor with a capacitor layer.

Such an electric shock protection element 130 may have a breakdown voltage Vbr that satisfies the following equation so as to block the leakage current of the external electric power source:

Vbr> Vin

Where Vin is the rated voltage of the external power supply of the electromagnetic device.

At this time, the rated voltage may be a standard rated voltage for each country, for example, 240V, 110V, 220V, 120V, 110V, and 100V.

On the other hand, when the conductor 12 has an antenna function, the electric shock protection element 130 may be a suppressor having a capacitor layer or a varistor.

The electric shock protection device 130 includes an electric shock protection unit and at least one capacitor layer. The electric shock protection unit 130 shields the leakage current of the external power source and passes a communication signal flowing from the electric conductor 120, And may have a breakdown voltage (Vbr) of the protective portion:

Vbr> Vin

At this time, when the electric shock protection element 130 has a function of passing static electricity in order to protect the circuit portion at the rear end, the breakdown voltage Vbr of the electric shock protection portion satisfies the following condition:

Vcp> Vbr

Vcp is the dielectric breakdown voltage of the capacitor layer.

2 to 4, the electric shock protection device 130 may have different functions depending on a leakage current due to an external power source, a static electricity flowing from the electric conductor 12, and a communication signal.

2, when the leakage current of the external power source flows into the conductor 12 through the circuit portion 14 'of the circuit board 14, for example, the ground, 130 can be kept open since the breakdown voltage (or trigger voltage) Vbr is larger than the overvoltage due to the leakage current. That is, since the breakdown voltage Vbr of the electric shock protection element 130 is larger than the rated voltage of the external power source of the portable electronic device, the electric shock protection element 130 maintains the open state without being electrically conducted, It is possible to prevent the leakage current from being transmitted.

In this case, when the capacitor layer is provided in the electric shock protection device 130, the capacitor layer can block the DC component included in the leakage current, and since the leakage current has a relatively lower frequency than the radio communication band, So that the leakage current can be cut off.

As a result, the electric shock protection element 130 can protect the user from electric shock by blocking the leakage current to the external power source which flows from the ground of the circuit portion 14 '.

Referring to FIG. 3, when static electricity flows from the outside through the conductor 12, the electric shock protection element 130 functions as an electrostatic protection element such as a suppressor or a varistor. That is, when the electric shock protection element 130 is in the form of a varistor, since the breakdown voltage Vbr thereof is smaller than the instantaneous voltage of the static electricity, the electric shock can be electrically conducted to pass the static electricity. When the electric shock protection element 130 is in the form of a supercapacitor, since the operating voltage of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of the static electricity, the static electricity can be passed by the instantaneous discharge. As a result, the electric shock resistance protective element 130 can lower the electrical resistance when the static electricity flows from the conductor 12, and can pass the static electricity without being broken down by itself.

At this time, when the capacitor layer is provided in the electric shock protection device 130, since the insulation breakdown voltage Vcp of the capacitor layer is larger than the breakdown voltage Vbr of the electric shock protection portion, the static electricity does not flow into the capacitor layer, It can only pass through the protective part.

Here, the circuit portion 14 'may have a separate protection element for bypassing the static electricity to the ground. As a result, the electric shock protection element 130 can pass the static electricity without being broken down by the static electricity flowing from the conductor 12, thereby protecting the inner circuit of the following stage.

4, when a communication signal is input through the conductor 12, the electric shock protection element 130 functions as a capacitor. That is, the electric shock protection element 130 keeps the electric shock protection part in the open state to shut off the conductor 12 and the circuit part 14 ', but can pass the communication signal in which the capacitor layer inside is passed. Thus, the capacitor layer of the electric shock protection element 130 can provide the inflow path of the communication signal.

Here, the capacitance of the capacitor layer is preferably set so as to pass the communication signal of the main wireless communication band without attenuation.

Referring to FIGS. 5 and 6, according to the result of simulating a pass frequency band according to a capacitance, it is possible to transmit substantially no loss at a mobile radio communication frequency band (700 MHz to 2.6 GHz) Shot phenomenon.

However, as shown in FIG. 6, it can be seen that the capacitance of the capacitor layer is not influenced by the reception sensitivity at the time of the communication at a capacitance of about 30 pF or more. It is preferable to use a high capacitance of 30. Or more.

As a result, the electric shock protection element 130 can pass the communication signal introduced from the conductor 12 by the high capacitance of the capacitor layer without attenuation.

7, the pair of conductive connection portions 110 and 120 may be formed as foams 210 and 230 having an elastic force and may be brought into contact with the conductor 12 or the circuit board 14 so as to be energized . Referring to FIG. 7, a pair of the foams 210 and 230 are partially pressed by the conductor 12 or the circuit board 14 so that a part of the foams 210 and 230 in the pressed region (I.e., before being pressed by the conductor 12 and / or the circuit board 140) by the elastic forces of the foams 210, 230 when the conductor 12 is depressed and the conductor 12 is separated from the portable electronic device Lt; / RTI >

The body 211 of the foams 210 and 230 may include a plurality of bubbles 212 containing air or gas therein during the forming process. At this time, an inert gas such as argon or helium may be used as the gas contained in the foam.

The body 211 of the foams 210 and 230 provided in the conductive connection parts 110 and 120 may be formed of a material such as paper, synthetic resin, hemp, natural rubber, synthetic rubber, asbestos, leather, heat- And / or a conductive metal. Also, the foams 210 and 230 provided to the conductive connection parts 110 and 120 may be manufactured by thermally pressing at least one of the materials and at least a part of the conductive paste. The conductive connection parts 110 and 120 may be provided as at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a foam, a heat-resistant silicone rubber, and a tube manufactured by thermally bonding an electroconductive paste.

However, the present invention is not limited thereto, and any structure is applicable as long as the pair of conductive connection portions 110 and 120 have elasticity.

Referring to FIGS. 7 and 8, the contactor 200 for protecting the electric shock protection includes a contactor 100 for protecting the electric connection provided with the conductive connectors 110 and 120 as the foams 210 and 230, 210 and 230 may be formed in a polygonal shape. Here, the foams 120 and 230 may be provided in the form of a rectangular parallelepiped as shown in FIG. 8, but the present invention is not limited thereto, and may be provided in various shapes such as a quadrangular pyramid shape and a hemispherical shape.

In addition, referring to FIG. 8, the conductive member 213 may further include a conductive member 213 in forming the foams 210 and 230 of the conductive connection portions 110 and 120. At this time, the conductive member 213 may be included in the form of a wire or a plate. 8, the foam 210 further includes a conductive member 213 connecting between the conductor 12 and the electrode 222 of the electric shock protection element 220 can do.

When the conductive member 213 is included in the foams 210 and 230, the conductive member 213 is arranged to be perpendicular to the inside of the conductive body 211 ).

At this time, when the conductive member 213 formed in the region to be pressed is bent and the pressure applied to the foam 210 is removed, at least a part of the foam 210 is pressed, And can be restored to the vertical state.

When the conductive member 213 is included in the foams 210 and 230, the conductive member 213 may be formed in an oblique direction inside the conductive body 211, as shown in the conductive connection portion 230 .

Here, although the plate-shaped member 213 is shown by the conductive member 213 included in the foam 210, the plate may be replaced by a wire, and the plate and the wire may be used together .

As described above, when the conductive foams 210 and 230 are formed, conductive wires and / or conductive plates are further included, so that the conductors 12 and the electrodes 222 and / 221 and the circuit board 14 can be improved and the elasticity of the conductive body 211 can be compensated.

Some of the foams 210 and 230 provided in the various forms may be in conductive contact with the conductor 12 or the circuit board 14 as shown in Fig. Such contact may be any of point contact, line contact, and surface contact. Here, a portion of the foam 210, 230 contacting the conductor 12, the circuit board 14, or the one side of the anti-static device 130 may include a terminal for improving the electrical connection.

The pair of external electrodes 221 and 222 may be formed on the lower surface and the upper surface of the electric shock protection element 130, respectively. 8, a conductive adhesive layer 111 may be applied to the pair of external electrodes 221 and 222 on the upper and lower surfaces of the electric shock protection element 130, The foams 210 and 230 may be laminated, respectively. The electric shock protection element 220 or 220-1 may include an electric shock protection element 130 and a pair of external electrodes 221 and 222 formed on the upper and lower surfaces of the electric shock protection element 130 .

8 and 9, the electric shock protection device 130 includes a body 220a, an electric shock protection unit 225 or 225-1, and a plurality of capacitor layers 224a and 224b. At least one unit element including two or more internal electrodes 225a and 225b and an air gap 228 is arranged in series with each other and the capacitor layers 224a and 224b are electrically connected to a plurality of capacitor electrodes (S) 226a, 226b.

At this time, the body 120a may be formed with a plurality of sheet layers stacked. For example, the body 220a may include a plurality of electrodes 225a, 225b, 226a, and 226b formed on at least a part of one surface thereof so as to configure the electric shock protection device 130 and the capacitor layers 224a and 224b. The sheet layers 220a-1 to 220b-12 are sequentially stacked, and a plurality of electrodes provided on one surface of the sheet layers 220a-1 to 220b-12 are disposed facing each other, and then integrally formed through a pressing, firing or curing process.

Such a body 220a may be made of an insulator having a dielectric constant. For example, the insulator may be made of a ceramic material, a low temperature sintered ceramics (LTCC), a high temperature sintered ceramics (HTCC), and a magnetic material. At this time, the ceramic material of the metal-based and oxidative compounds, metal-based oxide compounds _{Er 2 O 3, Dy 2 O} 3, Ho 2 O 3, V 2 O 5, CoO, MoO 3, SnO 2, BaTiO 3, Nd 2 O 3 And may include at least one selected.

Here, the external electrode 221 may be formed on the bottom surface of the body 220a, and the external electrode 222 may be formed on the top surface of the body 220a. At this time, the external electrode 221 may be electrically connected to the foam 230 disposed under the electric shock protection device 130. The foam 230 may be electrically connected to the circuit board 14. In addition, the external electrode 222 may be electrically connected to the foam 210 disposed on the upper side of the electric shock protection device 130. And, the foam 210 may be electrically connected to the circuit board 12.

Each of the plurality of sheet layers 220a-1 to 220a-11 constituting the body 220a is electrically connected to the internal electrodes 225a and 225b and the capacitor layers 224a and 224b constituting the electric shock protection part 225 And one of the capacitor electrodes 226a and 226b may be formed. For example, the upper sheet layers 220a-1 and 220a-4 to 220a-7 are formed such that the internal electrodes 225a and the capacitor electrodes 226a and 226b are formed on the lower surface of the corresponding sheet layer, The internal electrodes 225b and the capacitor electrodes 226a and 226b may be formed on the upper surface of the corresponding sheet layer 220a-2, 220a-3, 220a-8 to 220a-11.

Here, the plurality of sheet layers 220a-1 to 220a-11 may be formed with through holes 223a 'and 223b' for forming the intermediate electrodes 223a and 223b. That is, the sheet layers 220a-1 to 220a-10 are formed with through holes 223a 'and 223b' at positions corresponding to both the internal electrodes 225a and 225b The through hole 223a 'is formed at a position corresponding to the internal electrode 225a (left side in the drawing), and the sheet layer 220a-11 is positioned at a position corresponding to the internal electrode 225b (Right side in the drawing) may be formed through the through hole 223b '.

The outer electrode 222 is formed on the top surface of the sheet layer 220a-4 disposed on the uppermost side of the elementary body 220a and the outer electrode 221 is disposed on the lowermost sheet 220a-11. As shown in FIG.

Here, the electric shock protection device 220 may be configured to prevent the electric shock protection unit 225 and the capacitor layers 224a and 224b from being electrically connected to the electric shock protection unit 225 and the capacitor layers 224a and 224b, And may further include a pair of intermediate electrodes 223a and 223b to which both ends are electrically connected. The pair of intermediate electrodes 223a and 223b may be formed through the internal electrodes 225a and 225b and the capacitor electrodes 226a and 226b. The intermediate electrode 223a may be connected to the external electrode 222 and the intermediate electrode 223b may be connected to the external electrode 221. [

The inner electrodes 225a and 225b are spaced apart from each other at a predetermined interval in the body 220a and a pair of inner electrodes facing each other constitute a unit element of the electric shock protection unit 225.

Here, one internal electrode 225a is connected to the intermediate electrode 223a, and the other internal electrode 225b is connected to the intermediate electrode 223b. The inner electrode 225a and the inner electrode 225b are formed of at least one gap 228. The inner electrode 225a and the inner electrode 225b oppose the inner electrode 225a, They are connected in series.

Here, when a plurality of voids 228 are disposed between the internal electrode 225a and the internal electrode 225b, the internal electrode 225a and the internal electrode 225b may be connected in parallel via the gap 228. [

The internal electrode 225a and the internal electrode 225b may be formed in the same sheet layer (for example, 220a-1), and at least one common electrode may be included in the sheet layer 220a-3. At this time, the gap 228 is arranged in series with the internal electrode 225a and the internal electrode 225b so that the internal electrode 225a and the internal electrode 225b can be connected in series with one common electrode (not shown) have.

In this case, the inner electrode facing the inner electrode 225a and the inner electrode facing the inner electrode 225b may be formed of one common electrode (not shown). That is, the plurality of unit elements may be connected in series to the intermediate electrodes 223a and 223b through common electrodes (not shown) connected to neighboring air gaps 228. [

That is, the internal electrodes 225a and 225b include a pair of internal electrodes 225a and 225b connected to the pair of intermediate electrodes 223a and 223b, and a plurality of common electrodes 225a and 225b connected to the adjacent gaps 228, (Not shown). Here, the common electrode included in the electric shock protection element 200 may be included in the concept of the internal electrode.

In the present embodiment, one unit element formed by internal electrodes is shown and described as one unit. However, the present invention is not limited to this, and two or more unit elements may be formed.

By arranging a plurality of unit elements in series, it is possible to disperse the functions of the unit elements with respect to the static electricity or leakage current flowing from the outside, and therefore the resistance to the introduced energy can be enhanced to improve the electrical characteristics .

The internal electrodes 225a and 225b, the common electrode and the intermediate electrodes 223a and 223b may include any one or more of Ag, Au, Pt, Pd, Ni, and Cu. The external electrode 222 may include any one or more of Ag, Ni, and Sn components.

The pair of inner electrodes 225a and 225b and / or the common electrode may be formed in various shapes and patterns. The inner electrode 225a and the common electrode or the inner electrode 225b may be formed in various shapes and patterns. And the common electrode may be provided in the same pattern or may have different patterns. That is, when the internal electrodes 225a and 225b and the common electrode are arranged such that a part of the electrodes (for example, the internal electrodes 225a and 225b and / or the common electrode) overlap each other in the configuration of the elementary body 220a, It is not limited to the pattern.

Here, the intervals between the internal electrodes 225a and 225b, the common electrodes, and the areas facing each other or overlapping with each other may be configured to satisfy the breakdown voltage Vbr of the electric shock protection element 220, The interval between the electrodes 225a and 225c or the interval between the internal electrodes 225b and 225c may be 10 to 100 mu m.

The air gap 228 may be formed by, for example, a gap forming member 227. For example, referring to FIG. 11, the gap forming member 227 may be inserted between the pair of internal electrodes 225a and 225b in the body 220a. That is, the gap forming member 227 is provided in the sheet layer 220a-2 in the electric shock protection portion 225, and the gap between the internal electrode 225a and the sheet electrode 220a-2 And can be exposed upward and downward.

10, the gap forming member 227 may include discharge material layers 227a-1, 227a-2, and 227a-3 applied to the inner wall of the gap forming member 227 at a predetermined thickness along the height direction . Here, the discharge material constituting the discharge material layers 227a-1, 227a-2, and 227a-3 has a low dielectric constant, no 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 internal electrodes 225a and 225b and / or the common electrode include an Ag component, the discharge material may include a SiC-ZnO based component. The SiC (Silicon Carbide) component has excellent thermal stability, excellent stability in an oxidizing atmosphere, constant conductivity and heat conductivity, and low dielectric constant. The ZnO component has excellent nonlinear resistance and discharge characteristics.

In addition, both SiC and ZnO have conductivity when used separately, but when they are mixed and fired, ZnO is bonded to the surface of SiC particles to form an insulating layer having a low conductivity.

In such an insulating layer, SiC completely reacts to form a SiC-ZnO reaction layer on the surface of the SiC particles. Accordingly, the insulating layer blocks the Ag path to provide a further higher insulating property to the discharge material and improves the resistance to static electricity, thereby solving the DC shorting phenomenon when the contact protection contactor 100 is mounted on the electronic part .

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 suitable for the components constituting the internal electrodes 225a and 225b and / Non-conductive materials can be used including materials or metal particles

The discharge material layer applied to the inner wall of the gap forming member 227 may include a first portion 227a-1 applied along the inner wall of the gap forming member 227 and a second portion 227b- A second portion 227a-2 extending from the upper end so as to be in contact with the inner electrode 225a and a third portion 227a-2 extending in contact with the inner electrode 225b from the lower end of the first portion 227a- Portion 227a-3.

The gap 227a-1, 227a-2, and 227a-3 are formed not only from the inner wall of the gap forming member 227 but also from the upper and lower ends of the gap forming member 227, 227a-2 and the third portion 227a-3 are extended so that the contact area with the internal electrode 225a and the internal electrode 225b can be widened.

This is because a part of the components constituting the discharge material layers 227a-1, 227a-2 and 227a-3 is vaporized by the electrostatic spark due to the overvoltage to form the discharge material layers 227a-1, 227a-2 and 227a- , 227a-2, 227a-3 can perform their functions by enhancing the resistance to static electricity even if a part of the discharge material layer 227a-1, 227a-2, 227a-3 is damaged.

A gap 228 may be formed between the pair of inner electrodes 225a and 225b by the gap forming member 227. [ The static electricity introduced from the outside by the gap 228 can be discharged between the pair of internal electrodes 225a and 225b. At this time, the electrical resistance between the pair of inner electrodes 225a and 225b is lowered, and the voltage difference between both ends of the protection contactor 200 can be reduced to a certain value or less. Therefore, the contactor 200 for an electric shock protection can pass static electricity without causing internal breakdown.

On the other hand, a plurality of void forming members 227 may be provided between the pair of inner electrodes 225a and 225b. As described above, when the number of the gap forming members 227 disposed between the pair of inner electrodes is increased, the discharge path of the static electricity is increased, so that resistance to static electricity can be increased.

The capacitor layers 224a and 224b may be at least one stacked capacitor layer for passing communication signals incoming from the conductors 12. The capacitor layers 224a and 224b may be electrically connected in parallel with the electric shock protection unit 225 through the intermediate electrodes 223a and 223b. For example, the upper and lower portions of the electric shock protection unit 225 Or both of the upper and lower sides of the capacitor electrodes 226a and 226b, and may have a plurality of capacitor electrodes 226a and 226b. Here, the capacitor electrode 226a may be connected to the intermediate electrode 223a, and the capacitor electrode 226b may be electrically connected to the intermediate electrode 223b.

These capacitor layers 224a and 224b are intended to provide additional capacitance of the electric shock protection element 130 to improve RF reception sensitivity.

Unlike the prior art in which a separate component for increasing the RF reception sensitivity is used together with a suppressor, a varistor or a Zener diode for protecting the internal circuit against static electricity by the capacitor layers 224a and 224b, An electric shock protection device has an advantage of protecting not only static electricity but also RF receiving sensitivity.

The interval between the electric shock protection unit 225 and the capacitor layers 224a and 224b may be set to be shorter than an interval between the internal electrodes 225a and 225b and / or a common electrode or an interval between the capacitor electrodes 226a and 226b . That is, the capacitive layers 224a and 224b may prevent the static electricity or the leakage current flowing along the internal electrodes 225a and 225b and / or the common electrode from leaking to the adjacent capacitor electrodes 226a and 226b. It is desirable to secure a sufficient distance between the capacitor electrodes 226a and 226b closest to the internal electrodes 225a and 225b and / or the common electrode.

Here, the sheet layer on which the electric shock protection part 225 and the upper and lower capacitor layers 224a and 224b are formed may be made of the same material, but may be made of different materials.

Further, at least one sheet layer of the plurality of sheet layers 220a-4 to 220a-11 constituting the capacitor layers 224a and 224b uses the first ceramic material, and the remaining sheet layers use the second ceramic material Can be used.

At this time, the first ceramic material and the second ceramic material may be heterogeneous ceramic materials. Here, the meaning of 'heterogeneous' means that the physical properties are mutually consulted even if the chemical formulas are different from each other or the chemical formulas are the same.

12, 13, 15, 16 and 17 show various embodiments of the electric shock protection part included in the electric shock protection element.

The electric shock protection element 220 or 220-1 may be formed in various forms in forming the gap forming member 227. [ 12, the discharge material layers 227a-1, 227a-2, and 227a-3 surrounding the gap 228 in the electric shock protection element 220-2 may be formed into a variety of shapes, Can be formed.

13 and 14, a gap 228 may be formed between the internal electrodes 225a and 225b without using a separate gap forming member for the electric shock protection element 220-3.

At this time, the gap 228 may be disposed between the pair of inner electrodes 225a and 225b as shown in FIG. For this purpose, a through hole may be provided at a position corresponding to the gap 228 of the sheet layer 220a-2 on which the gap is formed.

Referring to FIG. 15, a filling layer (or filler) 227 'may be disposed in the through hole formed in the sheet layer 220a-2 in the electric shock protection element 220-4. That is, a filler 227 'made of a discharge material filled inside can be formed between the pair of internal electrodes 225a and 225b.

Referring to FIG. 16, the electric shock protection unit 225-2 of the electric shock protection element 220-5 may include internal electrodes 225a 'and 225b' disposed horizontally spaced apart from each other by a predetermined distance. That is, the electric shock protection element 220-5 may include a horizontal electrode formed on the same sheet layer.

At this time, a gap 228 'may be formed between the pair of internal electrodes 225a' and 225b '. Here, the space 228 'may be formed to have a height greater than the height of the internal electrodes 225a' and 225b ', and may be formed to have a width larger than the interval between the internal electrodes 225a' and 225b '. As the volume of the gap 228 'is expanded, even if minute particles are generated from the internal electrodes 225a' and 225b 'during discharge by the static electricity, the space between the internal electrodes 225a' and 225b ' It is possible to reduce the incidence of defects that can be caused by the defects.

Here, the gap 228 'is a space in which discharge is initiated by a pair of internal electrodes 225a' and 225b 'upon introduction of static electricity, and the volume of the gap 228' is set to satisfy resistance to static electricity . For example, the volume of the gap 228 'may be 1-15% of the total volume of the electric shock protection element 220-5.

Also, in the electric shock protection device 220-5, the internal electrodes 225a 'and 225b' are spaced apart from each other on the same sheet layer, and a gap 228 'formed between the internal electrodes is formed in the form of a through hole Lt; / RTI >

That is, the through holes may be disposed between the pair of internal electrodes 225a 'and 225b' arranged in parallel to each other on the same sheet layer, and may be hollow so as to fill the air.

Further, the electric shock protection element 220-5 may include a discharge material layer (not shown) on the sidewall of the gap. The layer of the discharge material may be applied to the inner wall of the through hole 228 'formed in the sheet layer 220a-2 with a predetermined thickness along the height direction.

In addition, a filler layer 227 'may be disposed in the through hole formed in the sheet layer 220a-2 of the electric shock protection element 220-5. That is, a filling layer 227 'made of a discharge material filled inside can be formed between the pair of internal electrodes 225a' and 225b '.

17, the electric shock protection portion 225-3 of the electric shock protection element 220-6 may include the varistor material layers 220b and 220c and the internal electrodes 225a and 225b have.

Here, the varistor material layer may be composed of at least two layers alternately including a first varistor material layer 220b and a second varistor material layer 220c. Here, the first varistor material layer 220b and the second varistor material layer 220c may be any one of a semiconductive material containing at least one of ZnO, SrTiO3, BaTiO3, and SiC, or a Pr and Bi-based material have.

The internal electrodes 225a and 225b of the electric shock protection unit 225-3 are electrically connected to the first varistor material layer 220b by a plurality of first internal electrodes 225a and second varistor materials And a plurality of second internal electrodes 225b spaced apart by a predetermined distance L on the layer 220c.

Here, the breakdown voltage Vbr of the electric shock protection unit 225-3 may be the sum of breakdown voltages formed between the first internal electrode 225a and the second internal electrode 225b, which are closest to each other.

Each of the first internal electrode 225a and the second internal electrode 225b may be disposed so that at least a part of the first internal electrode 225a and the second internal electrode 225b do not overlap. That is, each of the first internal electrode 225a and the second internal electrode 225b may be disposed in an intersecting manner so that at least a part of the first internal electrode 225a and the second internal electrode 225b are overlapped with each other or may not be overlapped with each other.

The first internal electrode or the second internal electrode does not leak static electricity or leakage current to the adjacent capacitor electrodes 226a and 226b of the internal electrodes 225a and 225b but is normally leaked between the internal electrodes 225a and 225b It is preferable that the interval is set so that it can proceed.

That is, each of the first internal electrode 225a and the second internal electrode 225b is formed such that the distance between the adjacent capacitor electrodes 226a and 226b is larger than the spacing distance L between the internal electrodes 225a and 225b .

The spacing L1 between the first internal electrode 225a and the neighboring first internal electrode 225c is shorter than the distance between the first internal electrode 225a and the second internal electrode 225b Can be determined based on the distance d1 and the shortest distance d2 between the first internal electrode 225c adjacent to the first internal electrode 225a and the second internal electrode 225b.

The spacing L1 between one first internal electrode 225a and another adjacent first internal electrode 225c may be set to a distance between the first internal electrode 225a and the second internal electrode 225b Is set to be larger than the shortest distance d1 of the first inner electrode 225a or the shortest distance d2 between the first inner electrode 225c adjacent to the first inner electrode 225a and the second inner electrode 225b .

The spacing L1 between one first internal electrode 225a and another neighboring first internal electrode 225c is greater than the spacing L1 between the first internal electrode 225a and the second internal electrode 225b And the shortest distance d2 between the first internal electrode 225c adjacent to the first internal electrode 225a and the second internal electrode 225b is determined to be larger than the shortest distance d1 between the first internal electrode 225a and the second internal electrode 225b .

Referring to FIG. 18, a conductive adhesive layer 111 is coated on one surface of a pair of external electrodes 222 'and 221' on the top and bottom surfaces of the electric shock protection element 130 ', as shown in FIGS. And a pair of foams 210 and 230 can be laminated through the conductive adhesive layer 111, respectively.

Here, the electric shock protection element 130 'may include a pair of grooves 136 on the top and bottom surfaces thereof. The pair of external electrodes 222 'and 221' may be provided on the bottom surface of the pair of grooves 136, respectively. At this time, the pair of foams 210 and 230 may be laminated in each of the pair of the grooves 136 through the conductive adhesive layer 111. At this time, a part of the pair of foams 210 and 230 is brought into contact with the external electrodes 222 'and 221' provided on the bottom surfaces of the pair of grooves (or the receiving portions 136) through the conductive adhesive layer 111 Lt; / RTI >

The pair of grooves 136 can serve as a side stopper due to the structure of the electric shock protection element 130 'in which the groove 136 is formed. Therefore, the pair of foams 210 and 230, So that the manufacturing cost can be reduced. In addition, since at least a part of the pair of foams 210 and 230 is inserted into the pair of groove portions 136, it is possible to prevent disengagement of the foams 210 and 230 from the anti-static device 130 ' It is possible to prevent the semiconductor device from falling or deviating from the correct position in the reflow process.

Here, the functional contactor 200 'is shown and described as being provided with an electric shock protection element 130' between a pair of foams 210 and 230, but the present invention is not limited thereto, and a pair of foams 210 And 230 may be arranged symmetrically with respect to the electric shock protection element 130 'and electrically connected in series. For example, the pair of foams 210 and 230 may be disposed at positions that do not overlap each other.

Although the pair of external electrodes 222 'and 221' are formed on the upper surface and the lower surface of the electric shock protection device 130, the present invention is not limited thereto. The pair of external electrodes 222 'and 221' May be provided on a side surface of the electric shock protection element 130 '.

Referring to FIG. 19, the contactor 200 'may include a groove 136 on the upper side of the electric shock protection element 130', as shown in FIG. The body 220a 'is provided with a groove 136 for accommodating the foam 210 on the upper and lower sides thereof and at least a part of the foam 210 and 230 can be inserted into the groove 136 have.

The uppermost capacitor electrode 222 of the capacitor layer 224a and the uppermost capacitor electrode 221 of the capacitor layer 224b are exposed to the outside through one surface of the groove 136. Here, the foams 210 and 230 may be laminated on the uppermost capacitor electrodes 222 and 221 through the conductive adhesive layer 111.

In addition, in the electric shock protection element 130 'in which the groove portion 136 is formed, the electric shock protection portion 225 may be provided in various ways. For example, the electric shock protection portion 225 of the electric shock protection element 130 'may include the electric shock protection portions (for example, 225-1 to 225-3) described in FIGS. 8 to 17 and the various modified embodiments The same or similar to at least one of the examples.

Although the contactors 100 and 200 according to FIGS. 1 to 19 have been described as including a pair of foam-type conductive joints electrically connected to the upper and lower surfaces of the electric shock protection device 130, Various modifications may be made without departing from the scope of the present invention.

Here, the contactor for protecting against electric shock includes a foam-type conductive connection portion on the upper surface or the lower surface of the protection member, and the conductive connection portion electrically connected to the other surface of the protection member may be omitted.

7, if the foam 230 is omitted, the external electrode 221 may be electrically connected to the circuit board 14. For example, as shown in FIG. At this time, a conductive adhesive portion 111 may be formed between the external electrode 221 and the circuit board 14. [ Here, the external electrode 221, which is electrically connected to the circuit board 14, may be referred to as a connection electrode 221.

By the arrangement of the contactor for protecting against electric shock, the portable electronic device including the contact for protection against electric shock protects the leakage current caused by the external power source from the external power source flowing from the ground of the circuit board 14 It is possible to protect the user and at the same time to protect the internal circuit from static electricity by allowing static electricity to pass through the conductor 12 without dielectric breakdown during the introduction of the static electricity from the conductor 12 and passing the communication signal coming from the conductor 12 without attenuation, Can be implemented.

In addition, the foam-type conductive connection portion may be manufactured by thermocompression bonding, including at least one of paper, synthetic resin, hemp, natural rubber, synthetic rubber, asbestos, leather, copper, lead, mild steel and conductive paste.

Further, the pair of internal electrodes may be arranged on the same plane.

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.

12: conductor 14: circuit board
100, 200, 200 ': Electric contact protection contactor
110, 120: conductive connection part 111: conductive adhesive layer
130, 130 '220: Electric shock protection element 221, 222, 221', 222 ': External electrode
136: grooves 210, 230: foam
220a: element bodies 223a and 223b: intermediate electrode
225: electric shock protection part 225a, 225b: internal electrode
224a, 224b: capacitor layers 226a, 226b: capacitor electrodes
227: void forming member 228: void

Claims

An electric shock protection device for interrupting a leakage current of an external power source flowing from a ground of a circuit board of an electronic device; And
A pair of foam type conductive members arranged in symmetry with respect to the electric shock protection element and having elasticity and electrically connecting the electric shock protection element and the electric conductor of the electric device and the electric shock protection element and the circuit board respectively in series, And a connection portion.

The method according to claim 1,
And the electric shock protection element passes a communication signal flowing from the electric conductor.

The method according to claim 1,
Wherein the electric shock protection element passes the static electricity without causing insulation breakdown upon introduction of static electricity from the electric conductor.

The method according to claim 1,
The electric shock protection device includes: a pair of external electrodes formed on an upper surface and a lower surface;
And a pair of conductive adhesive layers formed on upper surfaces of the pair of external electrodes,
Wherein each of the pair of foam type conductive connection portions is in electrical contact with each of the pair of external electrodes through each of the pair of conductive adhesive layers.

The method according to claim 1,
Wherein the electric shock protection element has a groove portion on an upper side and a lower side,
Wherein each of the pair of foam type conductive connection portions is inserted at least partially in each of the groove portions.

The method according to claim 1,
Wherein the electric shock protection element has a breakdown voltage (Vbr) satisfying the following expression.
Vbr> Vin
Where Vin is the rated voltage of the external power supply of the electronic device

3. The method of claim 2,
Wherein the electric shock protection element includes an electric shock protection portion and at least one capacitor layer,
Wherein the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following expression.
Vbr> Vin, Vcp> Vbr
Where Vin is the rated voltage of the external power supply of the electronic device,
Vcp is an insulation breakdown voltage of the capacitor layer

The method according to claim 1,
The foam-type conductive connection portion includes:
And a plurality of air bubbles including air or an inert gas.

The method according to claim 1,
The foam-type conductive connection portion includes:
Wherein the contactor is formed of at least one of paper, synthetic resin, hemp, natural rubber, synthetic rubber, asbestos, leather, copper, lead, mild steel and conductive paste.

The method according to claim 1,
The foam-type conductive connection portion includes:
Further comprising a conductive member in the form of a wire and a plate formed in an oblique or vertical direction inside the conductive connection portion.

6. The method of claim 5,
Wherein the electric shock protection element includes an external electrode provided on a bottom surface of each of the groove portions,
Wherein each of the pair of foam type conductive connecting portions is fixed on the external electrode via a conductive adhesive layer.

The method according to claim 6,
The electric shock protection device
A body formed by stacking a plurality of sheet layers;
At least a pair of internal electrodes formed at predetermined intervals in the inside of the body; And
And a gap formed between the internal electrodes.

13. The method of claim 12,
And the pair of inner electrodes are disposed on the same plane.

13. The method of claim 12,
Wherein the gap comprises a layer of a discharge material applied to the inner wall at a predetermined thickness along the height direction.

The method according to claim 6,
The electric shock protection device
At least two varistor material layers alternately laminated with a first varistor material layer and a second varistor material layer;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer.

16. The method of claim 15,
Wherein the breakdown voltage (Vbr) is a sum of a breakdown voltage formed between the first internal electrode and the second internal electrode closest to each other.

16. The method of claim 15,
Wherein each of the first internal electrode and the second internal electrode is disposed such that at least a part thereof does not overlap or overlap with each other.

17. The method of claim 16,
The distance L between the plurality of first inner electrodes or the plurality of second inner electrodes may be set to be the shortest distance d1 between the first inner electrode and the second inner electrode, Is shorter than at least one of a shortest distance (d2) between another first inner electrode and the second inner electrode.

8. The method of claim 7,
And the capacitor layer is electrically connected in parallel with the electric shock protection portion.

8. The method of claim 7,
Wherein an interval between the capacitor layer and the electric shock protection portion is larger than an interval between a pair of internal electrodes of the electric shock protection portion.

8. The method of claim 7,
The electric shock protection device
A body formed by stacking a plurality of sheet layers;
An electric shock protection unit including at least a pair of internal electrodes formed at predetermined intervals in the inside of the body, and a gap formed between the internal electrodes; And
And at least one laminated capacitor layer through which the communication signal is passed.

22. The method of claim 21,
And the pair of inner electrodes are disposed on the same plane.

22. The method of claim 21,
Wherein the gap comprises a layer of a discharge material applied to the inner wall at a predetermined thickness along the height direction.

8. The method of claim 7,
The electric shock protection device
At least two varistor material layers alternately laminated with a first varistor material layer and a second varistor material layer, a plurality of first inner electrodes spaced apart by a constant distance (L) on the first varistor material layer, An electric shock protection unit including a plurality of second internal electrodes spaced apart by a predetermined distance L on a varistor material layer; And
And at least one laminated capacitor layer through which the communication signal is passed.

25. The method of claim 24,
Wherein the breakdown voltage (Vbr) is a sum of a breakdown voltage formed between the first internal electrode and the second internal electrode closest to each other.

25. The method of claim 24,
Wherein each of the first internal electrode and the second internal electrode is disposed such that at least a part thereof does not overlap or overlap with each other.

25. The method of claim 24,
The distance L between the plurality of first inner electrodes or the plurality of second inner electrodes may be set to be the shortest distance d1 between the first inner electrode and the second inner electrode, Is shorter than at least one of a shortest distance (d2) between another first inner electrode and the second inner electrode.

Human contactable conductors;
A circuit board on which a plurality of passive elements and active elements are installed; And
27. The portable electronic device according to any one of claims 1 to 27, wherein one end is electrically connected to the circuit board and the other end is electrically connected to the electrical conductor in series.

29. The method of claim 28,
Wherein the conductor has an electric shock protection function comprising at least one of an antenna, a metal case, and a conductive ornament for communication between the electronic device and an external device.