KR101808021B1 - Circuit protection device and mobile electronic device with the same - Google Patents

Abstract

An electric shock protection device and a portable electronic device having the same are provided. An electric shock protection device according to an exemplary embodiment of the present invention is an electric shock protection device for connecting between a metal case which is a human contactable conductor of an electronic device including an area used as an antenna and a built-in circuit part, A plurality of capacitor electrodes spaced apart from each other and adapted to pass a communication signal input from a metal case used as an antenna and to transmit the communication signal in a communication frequency band without attenuation, At least one capacitor portion having a dielectric constant of 20 or more so as to improve the blocking ability of a DC component in leakage current due to an external power supply and to have an insulation breakdown voltage higher than a rated voltage of an external power supply of the electronic device; And at least one pair of internal electrodes arranged in opposition to each other at regular intervals in a second elementary body and a second elementary body arranged on one side of the first elementary body and connected in parallel with at least one capacitor element, And shielding the leakage current from being transmitted to the metal case.

Description

[0001] The present invention relates to an electric shock protection device and a portable electronic device having the same,

The present invention relates to an electric shock protection device and a portable electronic device having the same, and more particularly, to an electric shock protection device that protects a user from a leakage current by a power source, protects an internal circuit from external static electricity, minimizes attenuation of a communication signal, And a portable electronic device having the same.

Recently, the adoption of a metal-made housing has been increasing in order to improve aesthetics and robustness of portable electronic devices.

However, since the metal housing is excellent in electrical conductivity due to the nature of the material, an electrical path can be formed between the housing and the built-in circuit depending on the specific device or depending on the location. Particularly, since the metal housing and the circuit part form a loop, when a static electricity having a high voltage instantaneously flows through a conductor such as a metal housing having a large exposed surface area, the circuit part such as an IC can be damaged, Measures are required.

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, the user can give an unpleasant feeling of crushing and, in severe cases, You can wear it.

Therefore, a portable electronic device such as a cellular phone employing a metal case is required to protect the user from such a leakage current.

Meanwhile, the portable electronic device having the metal-made housing has a plurality of antennas according to function, and at least a part of the antennas is an internal antenna. The portable electronic device is disposed in the external housing of the portable electronic device, It is a tendency to use it as an antenna.

In such a case, the antenna and the internal circuit of the portable electronic device must be connected. At this time, the communication signal must be smoothly transmitted to the internal circuit without attenuation.

However, as described above, when the capacitance of a corresponding device is increased to effectively transmit a communication signal, there is a problem that the device is destroyed by external static electricity and thus the device is damaged.

Furthermore, as described above, it is difficult to realize the implementation of a high breakdown voltage for interrupting the leakage current due to the external power supply and the implementation of the high capacity capacitance for transmitting the communication signal, because of the opposite effect. Therefore, there is a demand for a protection against static electricity, a prevention of leakage current, and a high capacitance at the same time.

KR 0573364 B

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and provides an electric shock protection device capable of protecting an internal circuit and / It is an object to provide an electronic device.

According to an aspect of the present invention, there is provided an electric shock protection device for connecting a metal case, which is a human contactable conductor of an electronic device including an area used as an antenna, And a plurality of capacitor electrodes spaced apart from each other, wherein the communication signal passing through the metal case used as the antenna is passed through, and the communication signal passes through the communication frequency band without attenuation, At least one capacitor portion having a dielectric constant of 20 or more so as to improve the blocking ability of a DC component in a leakage current due to an external power supply of the electronic device and to have an insulation breakdown voltage higher than a rated voltage of the external power supply of the electronic device; And at least one pair of internal electrodes arranged to face each other with a predetermined gap therebetween in the second elementary body and arranged in parallel with the at least one capacitor unit, And an electric shock protection unit that passes static electricity flowing from the metal case and blocks the leakage current from being transmitted to the metal case.

 According to another aspect of the present invention, there is provided an electric shock protection device for connecting a metal case, which is a human contactable conductor, of an electronic device including an area used as an antenna, and an internal circuit portion, At least one capacitor portion including a capacitor electrode; An electric shock protection unit including a second elementary body disposed on one side of the first elementary body and at least a pair of internal electrodes disposed opposite to the second elementary element with a predetermined gap therebetween; And a pair of external electrodes provided at both ends of the first and second main bodies and connected to the pair of internal electrodes and the plurality of capacitor electrodes. Here, the electric shock protection unit and the at least one capacitor unit pass static electricity flowing from the metal case and prevent leakage current due to an external power source of the electronic device flowing from the ground of the internal circuit unit to the metal case And a communication signal input from the metal case used as the antenna is passed through the antenna,

Vbr> Vin, Vcp> Vbr

Here, Vbr is a breakdown voltage of the electric shock protection portion,

Vin is the rated voltage of the external power supply of the electronic device,

Vcp is an insulation breakdown voltage of the capacitor portion,

The rated voltage is the national standard rated voltage,

Wherein the at least one capacitor portion has a dielectric constant such that the communication signal passes through the communication frequency band without attenuation and improves the blocking ability of the DC component in the leakage current and has an insulation breakdown voltage higher than the rated voltage of the external power supply of the electronic device 20 or more.

According to a preferred embodiment of the present invention, the pair of inner electrodes may be partially overlapped or disposed on the same plane.

In addition, the electric shock protection unit may further include a gap which is a space in which discharge is initiated by the pair of internal electrodes when static electricity flows.

The electric shock protection unit may further include a discharge material layer disposed between the pair of internal electrodes and including at least one of Ti, Ni, Zn, Co, Tc, Zr, La, Nd and Pt .

The at least one capacitor portion may have a dielectric constant of 35 or more.

Further, the first elementary body and the second elementary body may include ceramics.

Meanwhile, the present invention is an electric shock protection device for connecting a metal case, which is a human contactable conductor of an electronic device including an area used as an antenna, with an internal circuit, and includes at least one of Ti, Zn, Ce, Nd and Bi And a plurality of capacitor electrodes spaced apart from each other in the first elementary body, wherein the communication signal passes through the metal case used as the antenna through the communication frequency band without attenuation At least one of which has a dielectric constant of not less than 20 so as to have an insulation breakdown voltage higher than a rated voltage of an external power supply of the electronic device, A capacitor portion; And a second elementary body disposed on one side of the first elementary body and including at least one of Ti, Zn, Ce, Nd, and Bi, and at least a pair of internal electrodes And a layer of a discharge material disposed between the pair of internal electrodes and including at least one of Ti, Ni, Zn, Co, Tc, Zr, La, Nd and Pt, And an electric shock protection unit that is connected in parallel to pass the static electricity flowing from the metal case and blocks the leakage current from being transmitted to the metal case. The width of each of the pair of inner electrodes overlaps with the width of the plurality of capacitor electrodes, and the thickness of the pair of inner electrodes is smaller than the thickness of the plurality of capacitor electrodes. The shortest distance between the free end of the capacitor electrode and one of the external electrodes not connected to the pair of external electrodes may be at least 15 mu m.

According to a preferred embodiment of the present invention, it is preferable that the pair of outer electrodes have a substantially 'C' shape extending in the horizontal direction from the upper and lower ends so as to partially cover the upper and lower surfaces of the first elementary body And may have a cross section.

An electric shock protection device and a portable electronic device having the same according to an embodiment of the present invention include an electric shock protection device for connecting a conductor and a circuit portion in a portable electronic device in which a conductor such as a metal case is exposed to the outside, It protects the user and internal circuits from leakage current and static electricity and realizes high capacitance, minimizing the attenuation of the communication signal and delivering it.

1 is an overall perspective view of an electric shock protection device according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view showing the lamination relationship of the plurality of sheet layers shown in Fig. 1,
Fig. 3 is a longitudinal sectional view of Fig. 1,
4A to 4E are conceptual diagrams showing an application example of an electric shock protection device according to an embodiment of the present invention,
5A to 5C are schematic equivalent circuit diagrams for explaining operation of (a) leakage current, (b) static electricity (ESD), and (c) communication signal of the electric shock protection device according to the embodiment of the present invention,
6A and 6B show simulation results of the pass frequency band according to the capacitance,
7A to 7E are views showing various forms of internal electrodes in an electric shock protection device according to an embodiment of the present invention,
8A to 8D are longitudinal sectional views showing various arrangement relationships of the electric shock protection unit and the capacitor unit in the electric shock protection device according to the embodiment of the present invention,
9A to 9G are longitudinal sectional views showing various arrangement relationships of the first ceramic material and the second ceramic material in the electric shock protection device according to the embodiment of the present invention,
10 is a longitudinal sectional view showing another example of the electric shock protection unit in the electric shock protection device according to the embodiment of the present invention,
FIGS. 11A to 11D are longitudinal sectional views showing various shapes of voids in an electric shock protection device according to an embodiment of the present invention,
12A to 12E are views showing various arrangement relationships of the electric shock protection unit and the capacitor unit in another example of the electric shock protection device according to the embodiment of the present invention,
13A to 13D are views showing various forms of internal electrodes in another example of an electric shock protection device according to an embodiment of the present invention,
FIG. 14 is a longitudinal sectional view showing still another example of the electric shock protection device according to the embodiment of the present invention, and FIG.
15A to 15C are vertical cross-sectional views illustrating various forms of voids in another example of an electric shock protection device 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 electric shock protection device 100 according to the embodiment of the present invention includes the electric shock protection unit 110 and the capacitor units 120a and 120b as shown in FIGS. 1 to 3, (110) may be a prepressor.

The electric shock protection element 100 is disposed between the human body contactable conductor of the electronic device and the internal circuit part so as to pass the static electricity without insulation breakdown when the static electricity flows from the electric conductor 12, (Vb) that satisfies the following equation to pass a communication signal flowing from the conductor (12): < EMI ID = 1.0 >

Vbr> Vin, Vcp> Vbr

Here, Vbr is the breakdown voltage of the electric shock protection element, Vin is the rated voltage of the external power supply of the electronic device, and Vcp is the breakdown voltage of the capacitor portion.

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

The breakdown voltage Vbr means a breakdown voltage (or trigger voltage) of the electric shock protection unit. The breakdown voltage Vbr is the breakdown voltage of the electric shock protection unit (or trigger voltage) , And a layer of a discharge material.

As shown in FIGS. 1 to 3, the electric shock protection device 100 includes a capacitor unit 110 including a first electric element 110, a second electric element 110, a second electric element 110, a second electric element 120, (120a, 120b).

The capacitor units 120a and 120b may be electrically connected in parallel to the electric shock protection unit 110 to pass the communication signal from the electric conductor 12 such as an antenna without attenuation. For example, the capacitor portions 120a and 120b may be disposed on at least one of the upper and lower portions of the electric shock protection portion 110, or both the upper portion and the lower portion. The dielectric breakdown voltage (Vcp) of the capacitor unit is applied to the outside of the electronic device to cut off the leakage current, particularly the DC component, of the external power source flowing from the ground of the circuit unit, May be greater than the rated voltage (Vbr) of the power source. At this time. The dielectric breakdown voltage Vcp of the capacitor portion is formed at both ends of the capacitor electrode included in the capacitor portion. In the case of the capacitor portion where the plurality of capacitor electrodes are disposed apart from each other, the dielectric breakdown voltage is a voltage at which a plurality of capacitor electrodes are connected in parallel And are formed between the respective capacitor electrodes as they are.

A plurality of sheet layers 121, 122, 123, 124, 125, 126, 127, 128 having capacitor electrodes 122a, 123a, 124a, 125a, 125a, 126a, 127a, 128a are sequentially stacked on the capacitors 120a, 120b, A plurality of electrodes provided on one surface may be arranged so as to face each other, and then a first body may be formed through a sintering or curing process so as to be integrally formed. Alternatively, the first body may be formed through a sintering or curing process after disposing the electrodes so as to have the electrode structures of the capacitor portions 120a and 120b in one sheet. At this time, the first elementary body may have a dielectric constant of 20 F / m or more, preferably a dielectric constant of 35 F / m or more so as to prevent attenuation of a communication signal passing therethrough, So that the blocking ability of the DC component in the leakage current of the capacitor portion is improved and the breakdown voltage of the external power supply of the electronic device can be higher than that of the external power supply of the electronic device, Or may not be destroyed by static electricity. Further, it may be more advantageous to implement the device so as to be more downsized. If the dielectric constant is less than 20 F / m, there is a problem of attenuating the reception sensitivity of a communication signal in a communication signal, for example, a mobile wireless communication frequency band. In order to realize a capacitor using a low dielectric constant body with a fixed capacitance, the distance between the electrodes must be remarkably narrowed. In this case, if there is a defect (including pores) in the body located between the electrodes, It may be highly undesirable to composite the capacitor unit designed with the electric shock protection unit so that the distance between the electrodes is remarkably narrowed due to the possibility that the dielectric breakdown may be significantly increased. Further, the breakdown of the leakage current and / or the circuit protection function from static electricity may be degraded or lost as the breakdown voltage Vcp of the capacitor becomes lower than the rated voltage of the external power supply of the electronic device and the capacitor portion is destroyed by insulation.

The first elementary bodies 121, 122, 123, 124, 125, 126, 127, and 128 may be made of a dielectric material and may be used without limitations in the case of a dielectric material having a dielectric constant of 20 F / m or more. For example, the dielectric forming the first body may be formed of a ceramic material and a magnetic material including low temperature sintered ceramics (LTCC) and high temperature sintered ceramics (HTCC). In this case, the ceramic material may be an oxide-based ceramic compound or a non-oxide-based ceramic compound, wherein the oxide-based ceramic compound is _{BeO, MgO, LaCrO 3, PbTiO} 3, (Ba, Pb) TiO 3, ZrO 2, 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, SiO 2, TiO 2, ZnO, SrTiO 3, LiNbO 3, LiTaO 3, Mn-based oxides, Ni-based oxides, Mn-based oxides, Al ₂ O _3, and solid solutions thereof. The non-oxide ceramic compound may include at least one selected from SiC, CdTe, TiC, TiN, B ₄ C, Si ₃ N ₄ , BN, TiB ₂ and AlN. In addition, the magnetic material may be a ferrite compound, and may be used without limitation in the case of conventional soft ferrite. One or more of Ni-Zn ferrite and Mn-Zn ferrite may be included.

The capacitor electrode electrodes 122a, 123a, 124a, 125a, 125a, 126a, 127a and 128a may include any one or more of Ag, Au, Pt, Pd, Ni and Cu. / Pd. In addition, the capacitor electrode may be formed in various shapes and patterns, and one or more of the plurality of capacitor electrodes may be provided in the same pattern or may have different patterns. That is, the capacitor electrode is not limited to the pattern of each capacitor electrode when disposed inside the first element so as to realize the desired capacitance.

 A plurality of capacitor electrodes 122a, 123a, 124a, 125a, 125a, 126a, 127a, and 128a constituting the capacitor units 120a and 120b are formed between a pair of opposing capacitor electrodes, The spacing between the first capacitor electrode 121a and the second capacitor electrode 122a in the first capacitor unit 120a may be in the range of 15 to 100 占 퐉, May be provided to have an interval.

If the distance between the capacitor electrodes is less than 15 mu m, it is difficult to ensure a sufficient capacitance for passing the communication signal of the wireless communication band without attenuation. If the distance exceeds 100 mu m, the distance between the capacitor electrodes is limited, Since the number of stacked sheet layers including the electrode is limited, it is difficult to realize a high capacity capacitor.

At this time, the thickness of each of the capacitor electrodes constituting the capacitor units 120a and 120b may be set to be 1/10 to 1/2 of the gap between the pair of capacitor electrodes facing each other.

For example, when the interval between the pair of capacitor electrodes facing each other is 20 μm, the thickness of the capacitor electrode may be set to be in the range of 2 to 10 μm. Here, if the thickness of the capacitor electrode is 2 mu m or less, it can not serve as an electrode. If the thickness is more than 10 mu m, the thickness of the capacitor electrode becomes thick and the distance between the capacitor electrodes for forming the capacitor portion is limited Since the number of stacked sheet layers including the capacitor electrode is limited, it is difficult to realize a capacitor of a high capacity.

The shortest distance d2 between the free ends of the capacitor electrodes that are not connected to the external electrodes and the external electrodes 131 and 132 is at least 15 mu m and the distance between 15 and 100 mu m is (See FIG. 11).

2, one capacitor electrode 121a is not formed in one sheet layer 121, and one capacitor layer 121a is formed in one sheet layer (not shown) A plurality of capacitor electrodes (not shown) arranged in a line in a row on the plurality of capacitor electrodes, and a plurality of sheet layers each including a plurality of capacitor sheet electrodes on one surface thereof, They may be arranged to face each other so as to have an overlapping area equal to or larger than the area. For example, the number of capacitor electrodes formed in one sheet layer may be two, the spacing distance may be 50 탆, and one of the two capacitor electrodes may be 120 탆 long and 360 탆 wide, One of the two capacitor electrodes included in one sheet layer may have a length of 1010 mu m and a width of 360 mu m and a total of twelve such sheet layers may be stacked, Layers of the two capacitor electrodes included in the layer were stacked so that the overlapped areas of the long length capacitor electrodes included in the two adjacent sheet layers were alternately stacked so as to have a width of 360 x 840 m in length After sintering, the capacitor part can be realized.

As described above, the electric shock protection device 100 is provided with the capacitor portions 120a and 120b so as to pass the static electricity and to block the leakage current of the external power source, and to provide a capacitance suitable for the communication band In particular, as the inclusion of the first element body having a dielectric constant of 20 F / m or more, the desired physical properties are more easily realized and the remarkably improved physical properties can be exhibited. That is, unlike the prior art in which a separate component for increasing RF reception sensitivity is used together with a suppressor, a varistor or a Zener diode for protecting the internal circuit against static electricity by such a capacitor unit, It is possible to increase the RF reception sensitivity as well as to protect the static electricity through the antenna 100. [

The electric shock protection unit 110 includes a plurality of sheet layers 111, 112 and 113 having internal electrodes 111a and 112a and an air gap forming member 115 on one surface thereof, The protective sheet layer 113 is laminated so as to be sandwiched between the sheet layers on which the electrodes are formed and the internal electrodes 111a and 112a provided on one surface of the other two sheet layers are arranged to face each other, And can be integrally formed by forming a body.

The second elementary body may be formed of a dielectric, a specific description thereof is the same as that of the first elementary body, and the dielectric forming the first elementary body and the dielectrics forming the second elementary body may be the same or different.

The internal electrodes 111a and 112a are spaced apart from each other within the second elementary body and may be formed of at least one pair. The internal electrodes 111a and 112a may include any one or more of Ag, Au, Pt, Pd, Ni, and Cu, and the external electrodes 131 and 132 may include any one or more of Ag, Ni, can do.

The first internal electrode 111a and the second internal electrode 112a may be formed in the same pattern or may have different patterns. . That is, the internal electrodes 111a and 112a are not limited to a specific pattern when the first internal electrode 111a and the second internal electrode 112a are disposed so as to overlap with each other when the first internal electrode 111a and the second internal electrode 112a are opposed to each other.

At this time, the intervals between the internal electrodes 111a and 112a, the areas facing each other, or the lengths overlapping with each other may be configured to satisfy the breakdown voltage Vbr of the electric shock protection device 100. For example, The interval between the electrodes 111a and 112a may be 10 to 100 占 퐉. For example, the interval between the internal electrodes 111a and 112a may be 25 占 퐉.

Here, if the interval between the first internal electrode 111a and the second internal electrode 112a is less than 10 mu m, resistance to static electricity may be weakened. If the interval between the first internal electrode 111a and the second internal electrode 112a exceeds 100 占 퐉, the discharge starting voltage (operating voltage) increases and a smooth discharge due to the static electricity is not generated, The function may be lost.

At this time, the thicknesses of the first internal electrode 111a and the second internal electrode 112a may be 2-10 탆. If the thicknesses of the first internal electrode 111a and the second internal electrode 112a are less than 2 占 퐉, they can not serve as internal electrodes. If the thickness is more than 10 占 퐉, the distance between the internal electrodes is limited , The volume of the electric shock protection device 100 increases, which may adversely affect miniaturization.

With this configuration, the discharge start voltage (operation voltage) due to the static electricity of the internal electrodes 111a and 112a can be 1 to 15 kV. Here, if the discharge starting voltage of the electric shock protection element 100 is 1 kV or less, it is difficult to secure the immunity against static electricity. If the electric discharge protection voltage is 15 kV or more, the static electricity can not pass therethrough, It can be damaged by static electricity.

On the other hand, between the pair of electrodes 111a and 112a corresponding to each other, a protective sheet layer 113 for protecting static electricity and protecting circuit protection elements and peripheral circuits from overvoltage is disposed.

The protection sheet layer 113 is provided with at least one air gap forming member 115 hollowed between the pair of internal electrodes 111a and 112a. For this purpose, the protection sheet layer 113 may have a through-hole at a position where the gap forming member 115 is provided.

Specifically, the second elementary body may include a first sheet layer 111 having a first internal electrode 111a on an upper surface thereof and a second sheet layer 111 having a second internal electrode 112a on a lower surface thereof. 112 are laminated to each other, and a protective sheet layer 113 is disposed between the first sheet layer 111 and the second sheet layer 112.

That is, the first sheet layer 211, the protective sheet layer 113, and the second sheet layer 112 are sequentially stacked so that the first internal electrode 111a and the second internal electrode 112a can face each other, do.

The first internal electrode 111a and the second internal electrode 112a are arranged to face each other and are spaced apart from each other by the protective sheet layer 213 at a predetermined interval. And the second internal electrode 112a are disposed so that one side thereof is in contact with the gap forming member 115, respectively.

The protective sheet layer 113 disposed between the first sheet layer 111 and the second sheet layer 112 may include at least one through hole.

Here, the through-holes are formed in a region where the first internal electrode 111a and the second internal electrode 112a, which are respectively disposed on the upper and lower sides of the protective sheet layer 113, are overlapped with each other.

At this time, an air gap forming member 115 may be provided in the through hole. The gap forming member 115 may be disposed between the internal electrodes 111a and 112a and may include a layer of the discharge material 125a, 125b, and 125c applied to the inner wall at a predetermined thickness along the height direction.

Alternatively, if the void forming member 115 is not separately provided, the layer of the discharge material may be applied to the inner wall of the through hole with a predetermined thickness along the height direction.

Here, the gap forming member 115 or the discharge material layer coated thereon is provided such that its upper end is in contact with the second inner electrode 112a and its lower end is in contact with the first inner electrode 111a.

By the gap forming member 115, the gap 216 can be formed between the pair of inner electrodes 111a and 112a. The static electricity introduced from the outside by the gap 216 can be discharged between the internal electrodes 111a and 112a. At this time, the electrical resistance between the internal electrodes 111a and 112a is lowered, and the voltage difference between both ends of the electric shock protection device 100 can be reduced to a certain value or less. Therefore, the electric shock protection unit 220 can pass the static electricity without being broken.

Here, the discharge material constituting the discharge material layers 125a, 125b, and 125c must have 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. In addition, the discharge material may be formed by mixing at least one material selected from SiC, carbon, graphite, and ZnO and at least one material selected from Ag, Pd, Pt, Au, Cu, Ni, It is possible.

For example, when the first internal electrode 111a and the second internal electrode 112a 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 characteristics and discharge characteristics.

Both SiC and ZnO have conductivity when used separately, but when they are sintered after mixing, ZnO is bonded to the surface of SiC particles to form an insulating layer.

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 resistance to static electricity, thereby solving the DC shorting phenomenon when the electric shock protection part 120 is mounted on the electronic part .

Here, it is described that the discharge material includes a SiC-ZnO-based material. However, the discharge material is not limited to the SiC-ZnO based material, and the discharge material may include a component constituting the first internal electrode 111a and the second internal electrode 112a A non-conductive material including a semiconductor material or metal particles may be used

At this time, the discharge material layers 115a, 115b, and 115c applied to the inner wall of the gap forming member 115 include a first portion 115a coated along the height direction of the inner wall of the gap forming member 115, A second portion 115b extending from the upper end of the first portion 115a to be in contact with and facing the first internal electrode 111a along the upper surface of the protective sheet layer 213, And a third portion 115c extending in contact with the second internal electrode 112a along the lower surface of the protective sheet layer 213 to be in contact with the second internal electrode 112a.

As a result, the discharge material layer 115a, 115b, and 115c are separated from the upper and lower ends of the gap forming member 115 as well as the inner wall of the gap forming member 115, The first internal electrode 111a and the second internal electrode 112a are extended to extend the contact area with the first internal electrode 111a and the second internal electrode 112a.

With this configuration, even if part of the discharge material layers 115a, 115b, and 115c is damaged as a part of the components of the discharge material layers 115a, 115b, and 115c is vaporized by the electrostatic spark, 115a, 115b, and 115c can perform their functions, resistance to static electricity can be improved.

The protective sheet layer 113 may include a plurality of void forming members 115. As described above, when the number of the gap forming members 115 is increased, the discharge path of the static electricity is increased, so that the resistance to static electricity can be increased.

The protective sheet layer 113 disposed between the first sheet layer 111 and the second sheet layer 112 is formed to have the same area as the first sheet layer 111 and the second sheet layer 112 The first internal electrode 111a and the second internal electrode 112a may be overlapped with each other and may have a smaller area than the first and second sheet layers 111 and 112 .

Meanwhile, the electric shock protection unit 110 and the capacitor units 120a and 120b may be electrically connected to each other in parallel so that the second small body is disposed on one side of the first small body, thereby realizing an electric shock protection element. The second prism body may be disposed between the first prism of the first capacitor unit 120a and the second prism of the second capacitor unit 120b as shown in FIGS. 1 to 3, The capacitor electrodes 121a, 122a, 123a, 124a, 125a, 126a, 127a and 128a of the capacitor units 120a and 120b and the internal electrodes 111a and 112a of the first and second main bodies 110 and 110, The external electrodes 131 and 132 may be electrically connected to each other. In addition, the external electrodes 131 and 132 are electrically connected to the human body-accessible conductor of the electronic device, respectively, so that the electric shock protection unit and the capacitor unit can be electrically connected in parallel.

Meanwhile, the electrodes included in the electric shock protection unit 110 and the capacitor units 120a and 120b may have different electrode pitches, electrode lengths, and / or electrode widths.

That is, the interval between the pair of internal electrodes 111a and 112a disposed opposite to each other may be the same as the interval between the capacitor electrodes 121a, 122a, 123a, 124a, 125a, 126a, 127a and 128a.

At this time, the interval between the electric shock protection unit 110 and the capacitor units 120a and 120b may be larger than the interval between the pair of internal electrodes 111a and 112a.

That is, it is preferable to ensure a sufficient distance from the internal electrodes 111a and 112a so that the static electricity or leakage current flowing along the pair of internal electrodes 111a and 112a does not leak to the adjacent capacitor electrodes. At this time, the distance between the capacitor units 120a and 120b and the electric shock protection unit 110 may be 15 to 100 mu m and preferably 2 times or more the interval between the pair of internal electrodes 111a and 112a Do. For example, when the gap between the pair of internal electrodes 111a and 112a is 10 占 퐉, the distance between the capacitor units 120a and 120b and the electric shock protection unit 110 may be 20 占 퐉 or more. Referring to FIG. 3, the distance between the capacitor unit and the electric shock protection unit is defined as a distance between the capacitor electrode 120a located closest to the electric shock protection unit 110 among the plurality of capacitor electrode units included in the capacitor unit 120a And the inner electrode 112a closest to the inner electrode provided in the electric shock protection unit 110. [

The electric shock protection unit 110 and the capacitor unit 220 may be formed by stacking a plurality of sheet layers forming a first body when the body included in each of the electric shock protection unit 110 and the capacitor unit 220 is formed by sintering after a single sheet layer is stacked, A plurality of sheet layers for forming a second sintered body are laminated on the second sintered body and then a plurality of sheet layers for forming a first sintered body on the second sintered body are stacked to form a first sintered body and a second sintered body An electric shock protection element can be realized. Or the first and second main bodies each formed by sintering may be laminated in a desired arrangement to form an electric shock protection element. The method of forming the electric shock protection element is not particularly limited.

Such an electric shock protection element 100 may be disposed between the conductor 12 and the circuit portion 14, such as an external metal case, in the portable electronic device 10, as shown in FIG. 4A.

Here, the portable electronic device 10 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.

Such a portable electronic device 10 may be made of conductive materials such as metal (aluminum, stainless steel, etc.) or carbon-fiber composite materials or other fiber-based composites, glass, ceramics, plastic, . ≪ / RTI >

At this time, the housing of the portable electronic device 10 may include a conductor 12 made of metal and exposed to the outside. Here, the conductor 12 may include at least one of an antenna for communication between the electronic device and an external device, a metal case, and conductive ornaments.

In particular, the metal case may be provided to partially surround or entirely surround the side of the housing of the portable electronic device 10. In addition, the metal case may be provided to surround the camera, which is exposed to the outside on the front surface or the rear surface of the housing of the electronic device.

As such, the electric shock protection element 100 may be disposed between the human contactable conductor 12 of the portable electronic device 10 and the circuit portion 14 to protect the internal circuit from leakage current and static electricity.

Such an anti-electrostatic device 100 may be suitably provided in accordance with the number of metal cases provided in the housing of the portable electronic device 10. [ However, when the metal case is provided in plurality, the metal cases 12a, 12b, 12c, and 12d may be embedded in the housing of the portable electronic device 10 so that the anti-shock devices 100 are individually connected. have.

That is, when the conductor 12 such as the metal case surrounding the side of the housing of the portable electronic device 10 is composed of three parts as shown in FIG. 4A, each of the conductors 12a, 12b, 12c, and 12d All of which are connected to the anti-shock device 100, thereby protecting the circuit inside the portable electronic device 10 from leakage current and static electricity.

When the plurality of metal cases 12a, 12b, 12c, and 12d are provided, the anti-shock device 100 may be provided in various ways according to the roles of the metal cases 12a, 12b, 12c, and 12d. have.

For example, when the camera of the portable electronic device 10 is exposed to the outside, when the anti-shock device 100 is applied to the conductor 12d surrounding the camera, the anti-shock device 100 May be provided in a form that blocks the leakage current and protects the internal circuit from static electricity.

In addition, when the metal case 12b serves as a ground, the anti-shock device 100 may be connected to the metal case 12b to shield the leakage current and protect the internal circuit from static electricity .

Meanwhile, as shown in FIG. 4B, the electric shock protection device 100 may be disposed between the metal case 12 'and the circuit board 14'. At this time, since the electric shock protection element 100 is for passing static electricity without damaging itself, the circuit board 14 'may have a separate protection element 16 for bypassing the static electricity to the ground. Here, the protection element 16 may be a suppressor or a varistor.

4C, the electric shock protection device 100 may be disposed through a matching circuit (e.g., R and L components) between the metal case 12 'and the FFM (front end module) 14a have. Here, the metal case 12 'may be an antenna. At this time, the electric shock protection element 100 is to pass the communication signal without attenuation, to pass the static electricity from the metal case 12 ', and to block the leakage current flowing from the ground through the matching circuit.

As shown in FIG. 4D, the electric shock protection device 100 may be disposed between the metal case 12 'having the antenna and the IC 14c implementing the communication function through the antenna. Here, the corresponding communication function may be NFC communication. At this time, since the electric shock protection element 100 is for passing the static electricity without damaging itself, it may be provided with a separate protection element 16 for bypassing the static electricity to the ground. Here, the protection element 16 may be a suppressor or a varistor.

4E, the electric shock protection element 100 may be disposed between the short pin 22 of the PIFA (Planar Inverted F Antenna) antenna 20 and the matching circuit. At this time, the electric shock protection element 100 is to pass the communication signal without attenuation, to pass the static electricity from the metal case 12 ', and to block the leakage current flowing from the ground through the matching circuit.

Such an electric shock protection device 100 may have different functions depending on the leakage current due to the external power source and the static electricity flowing from the conductor 12, as shown in Figs. 5A to 5C.

5A, when the leakage current of the external power source is introduced into the conductor 12 through the circuit board of the circuit unit 14, for example, the ground, the electric shock protection element 100 has its breakdown voltage (Vbr) is larger than the overvoltage due to the leakage current, it can be kept open. That is, since the breakdown voltage Vbr of the electric shock protection device 100 is larger than the rated voltage of the external power source of the portable electronic device, the electric shockproof protection device 100 maintains the open state without being electrically conducted, It is possible to prevent the leakage current from being transmitted.

At this time, the capacitor portions 120a and 120b provided in the electric shock protection device 100 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 device 100 can protect the user from electric shock by interrupting the leakage current to the external power source which flows from the ground of the circuit part 14. [

5B, when the static electricity flows from the outside through the conductor 12, the electric shock protection element 100 functions as an electrostatic protection element such as a suppressor. That is, since the operation voltage (discharge start voltage) of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of the static electricity, the electric shock protection element 100 can pass the static electricity by the instantaneous discharge. As a result, the electric shock protection element 100 can lower the electrical resistance when the static electricity flows from the conductor 12, so that the static electricity can pass without being electrically broken.

At this time, since the dielectric breakdown voltage Vcp of the capacitor units 120a and 120b provided in the electric shock protection device 100 is larger than the breakdown voltage Vbr of the electric shock protection unit 110, the static electricity is generated by the capacitors 120a and 120b, 120b, and can only pass through the electric shock protection unit 110. [

Here, the circuit unit 14 may have a separate protection element for bypassing the static electricity to the ground. As a result, the electric shock protection element 100 can pass the static electricity without being broken by the static electricity flowing from the electric conductor 12, thereby protecting the inner circuit of the following stage.

Further, as shown in Fig. 5C, when a communication signal is input through the conductor 12, the electric shock protection element 100 functions as a capacitor. That is, in the electric shock protection device 100, the electric shock protection unit 110 is kept open to shut off the conductor 12 and the circuit unit 14, but the internal capacitor units 120a and 120b pass the communication signal . In this manner, the capacitor portions 120a and 120b of the electric shock protection device 100 can provide the inflow path of the communication signal.

Here, the capacitances of the capacitor units 120a and 120b are preferably set so as to pass the communication signal of the main wireless communication band without attenuation. As shown in FIGS. 6A and 6B, according to the result of simulating the pass frequency band according to the capacitance, the mobile radio communication frequency band (700 MHz) for a capacitance of 5 ㎊ or more including the first element body having a permittivity of 40 F / To 2.6 GHz), and exhibits an electrically short circuit phenomenon.

However, as shown in FIG. 6B, it can be seen that the capacitance of the capacitor portion is not influenced by the sensitivity of the mobile communication in the case of a capacitance of about 20 pF or more, preferably 30 pF or more. In the wireless communication frequency band, it is preferable to use a capacitor including a body having a dielectric constant of 20 F / m or more so that it is easier to realize a high capacitance of 20 F or more.

As a result, the electric shock protection device 100 can pass the communication signal flowing from the conductor 12 without a reduction by the high capacitance of the capacitor portions 120a and 120b.

Hereinafter, various embodiments of the electric shock protection device according to the embodiment of the present invention will be described in detail with reference to FIGS. 7 to 12. FIG.

The first internal electrode 111a and the second internal electrode 112a constituting the internal electrode in the second elementary body may be provided in various shapes and patterns in the electric shock protection element 100, The first internal electrode 111a and the second internal electrode 112a may be provided in the same pattern or may have different patterns.

For example, as shown in FIG. 7A, end portions of a pair of second internal electrodes 112a are provided so as to overlap each other on both sides of a bar-shaped first internal electrode 111a having a predetermined length, One may be disposed in the overlapping area of the gap forming members 115 to which the discharge material layer is applied.

As shown in FIG. 7B, the first internal electrode 111a and the second internal electrode 112a are provided in a substantially Y-shape so that the two internal electrodes 111a and 112a are overlapped with each other, The gap forming members 115 to which the discharge material layers are applied may be respectively disposed in the overlapping areas.

In addition, as shown in FIG. 7C, the first internal electrodes 111a are formed in two bar shapes having a predetermined length, and the second internal electrodes 112a are formed in two in a substantially Y shape, And the air gap forming members 115 coated with the layer of the discharge material on the inner wall may be respectively disposed at four portions overlapping with each other.

As shown in FIG. 7D, the first internal electrode 111a and the second internal electrode 112a are formed in a bar shape having a predetermined length, and are formed in a region where the first internal electrode 111a and the second internal electrode 112a overlap each other, The air gap forming members 115 may be spaced apart from each other by a predetermined distance.

In addition, as shown in FIG. 7E, the first internal electrodes 111a are provided in a single bar shape having a predetermined length, and the second internal electrodes 112a are formed in two bar shapes having a predetermined length The air gap forming member 115 may be disposed such that a part of the first internal electrode 111a is overlapped with both ends of the first internal electrode 111a and two layers of the discharge material are applied to the overlapping region

The first internal electrode 111a and the second internal electrode 112a may be formed in various shapes and patterns. When the first internal electrode 111a and the second internal electrode 112a are stacked, It should be noted that it is not possible to arrange them to overlap each other.

8A to 8D, in the electric shock protection device 100, the electric shock protection device 100 and the capacitor portions 120a and 120b may be stacked in various manners.

That is, as shown in FIG. 8A, the capacitor portion 120a may be stacked only on the upper side of the electric shock protection portion 110, and only the lower side of the electric shock protection portion 110 May be stacked.

In addition, a plurality of the electric shock protection units 110 may be provided. For example, as shown in FIG. 8C, each of the capacitor units 120a and 120b may be disposed between the plurality of electric shock protection units 110, and as shown in FIG. 8D, The plurality of air gap forming members 120a and 120b may be symmetrically arranged with respect to the electric shock protection unit 110 and the plurality of air gap forming members 115 may be provided in the electric shock protection unit 110. [

That is, in the electric shock protection device 100 according to the present invention, a plurality of capacitors may be provided symmetrically with respect to the electric shock protection unit 110, asymmetrically, or a plurality of The electric shock protection unit 110 may be arranged to be disposed.

As described above, the number of the capacitor units 120a and 120b and the electric shock protection unit 110 for constructing the electric shock protection device 100 are not limited and may be variously provided according to the desired electrostatic capacity. The stacking relationship of the capacitor portion 110 and the capacitor portions 120a and 120b may be variously changed.

In another embodiment, as shown in FIGS. 9A to 9G, the plurality of sheet layers constituting the first elementary body and / or the second elementary body may be made of different kinds of ceramic materials .

Specifically, at least one of the plurality of sheet layers forming the first element of the capacitor portions 120a and 120b uses the first ceramic material A and the remaining sheet layer is the second ceramic material B) 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.

That is, the first ceramic material and the second ceramic material may be a kind of dielectric material in the above-described first elementary body. For example, the first ceramic material may be composed of a metal-based oxide compound containing at least one selected from Er2O3, Dy2O3, Ho2O3, V2O5, CoO, MoO3, SnO2, BaTiO3, and Nd2O3, and the second ceramic material may be composed of ferrite , The first ceramic material may be made of low temperature co-fired ceramic (LTCC), and the second ceramic material may be made of high temperature co-fired ceramic (HTCC).

The first ceramic material and the second ceramic material may be selected from the group consisting of Er2O3, Dy2O3, Ho2O3, V2O5, CoO, MoO3, SnO2, BaTiO3 and Nd2O3. Or a combination of the two.

That is, the first ceramic material and the second ceramic material may be formed in various forms of metal oxide compound, ferrite, low temperature co-fired ceramic (LTCC), and high temperature co-fired ceramic (HTCC) Or cured.

The capacitor portions 120a and 120b made of different kinds of ceramic material in the electric shock protection device 100 'according to the embodiment of the present invention may be formed of the first ceramic material and the second ceramic material, As shown in FIG.

As shown in FIG. 9A, the capacitor portions 120a and 120b bonded to the upper and lower sides of the electric shock protection portion 110 are made of the first ceramic material A, and the upper and lower layers of the electric shock protection element 100 ' The capacitor portions 120a and 120b may be formed of the second ceramic material B.

Hereinafter, for convenience of description, it is assumed that the second ceramic material is a heterogeneous material.

9A to 9G show various arrangement relationships of the first ceramic material and the second ceramic material. The non-hatched portion (A) means that the sheet is made of the first ceramic material, and the hatched portion (B) in the figure means that the sheet is made of the second ceramic material. That is, in FIGS. 9A to 9G, reference numerals A and B refer to the material of the sheet.

More specifically, the entire plurality of sheet layers constituting the capacitor portions 120a and 120b may be made of one of the first ceramic material A and the second ceramic material B. [

Some of the plurality of sheet layers constituting the capacitor portions 120a and 120b are made of the first ceramic material A and the remaining one of the plurality of sheet layers constituting the capacitor portions 120a and 120b May be made of a different kind of second ceramic material (B).

As shown in FIG. 9B, at least one intermediate sheet layer 141 and 142 may be disposed between the electric shock protection unit 110 and the capacitor units 120a and 120b, May be made of the same second ceramic material (B) as the capacitor portions (120a, 120b). Although the intermediate sheet layers 141 and 142 may be formed as separate sheet layers, the thickness of the sheet layers disposed on the lowermost or uppermost layers of the capacitor portions 120a and 120b may be relatively larger than that of the other sheet layers. Or the like.

9C, the capacitor portions 120a and 120b are made of a first ceramic material A, which is a different type of ceramic material, and the protective sheet layer 119 is made of a second ceramic material B, ≪ / RTI >

At this time, as shown in FIG. 9D, at least one intermediate sheet layer 141 and 142 may be disposed between the electric shock protection unit 110 and the capacitor units 120a and 120b, and the intermediate sheet layers 141 and 142 And a second ceramic material (B) identical to the protective sheet layer (119). Although the intermediate sheet layers 141 and 142 may be formed as separate sheets, the thickness of the sheets disposed on the lowermost or uppermost layers of the capacitor units 120a and 120b may be greater than that of the other sheets Lt; / RTI >

9E and 9F, a part of the sheet layers of the plurality of sheet layers constituting the capacitor portions 120a and 120b is made of the first ceramic material (A) of different materials, and the capacitor portion The remaining sheet layer and the protective sheet layer 119 of the plurality of sheet layers constituting the first ceramic material 120a and the second protective material layer 120b may be made of the second ceramic material B. [

9G, the electric shock protection unit 110 and the capacitor units 120a and 120b are made of the second ceramic material B, and the electric shock protection unit 110 and the capacitor units 120a, 120b, at least one intermediate sheet layer 141, 142 made of a first ceramic material (A), which is a different material, may be disposed.

As described above, in the electric shock protection device 100 'according to the embodiment of the present invention, the first ceramic material A and the second ceramic material B are selected and the first ceramic material A, which is a different type of ceramic material, The capacitor portions 120a and 120b can be formed of a material having a high dielectric constant so as to achieve a desired dielectric constant of 20 F / m or more, thereby realizing a desired characteristic, .

On the other hand, as shown in Figs. 9C to 9G, the protective sheet layer 119 constituting the second elementary body is made of a second ceramic material, and a part or all of the remaining part is made of a first ceramic material The first ceramic material may be arranged symmetrically with respect to the protective sheet layer 119 in the upward and downward directions.

This is because a uniform shrinkage ratio and structural stability can be achieved in consideration of the matching property of each material due to the bonding of the first ceramic material and the second ceramic material which are different materials. This structural stability makes it possible to improve the reliability of the electric shock protection device.

The first ceramic material, which is a different kind of material, is shown symmetrically on the basis of the protective sheet layer 119. However, the first ceramic material is not limited thereto, and may be asymmetric As shown in FIG.

In addition, when the first ceramic material, which is a different kind of material, is partially used for the capacitor portions 120a and 120b, it is possible to segment the products and capacities such as the varistor material and the like which are mainly resistive.

It is noted that the first ceramic material, which is a heterogeneous material, can be used in an appropriate thickness with respect to the total thickness of the first elementary body depending on the required characteristics and capacity.

In another embodiment, as shown in FIG. 10, the discharge protection layer may be disposed between the internal electrodes 111a and 111b without using a separate space forming member.

That is, in the electric shock protection unit 110, at least a part of the pair of internal electrodes 111a and 111b is arranged on the upper and lower portions of the protection sheet layer 112, and the pair of internal electrodes 111a, 111b are disposed between the first and second electrodes 111a, 111b. The pair of inner electrodes 111a and 111b may be provided directly on the upper and lower surfaces of the protection sheet layer 112 but may be provided on the upper and lower sheets of the protection sheet layer 112 .

For example, as shown in FIG. 10, the pair of inner electrodes 111a and 111b are arranged so as to overlap with each other, and the first inner electrode 111a and the second inner electrode 111b overlap each other A discharge material layer 145 filled with the inside is disposed between the pores.

Specifically, the first internal electrode 111a and the second internal electrode 111b are spaced upward and downward by a predetermined distance through the protective sheet layer 112, and the first internal electrode 111a and the second internal electrode 111b, And a discharge material layer 155 is disposed in a region where the first internal electrode 111a and the second internal electrode 111b are overlapped with each other.

As another embodiment, as shown in Figs. 11A to 11D, the space 154 may be formed between the internal electrodes 111a and 112a without using the separate space forming member in the electric shock protection element 100 " At this time, the sidewall of the gap 154 may include a discharge material layer 155.

That is, in the electric shock protection element 100 ", a protective sheet layer 113 is disposed between a pair of inner electrodes 111a and 112a facing each other, and at least one through hole The through hole 154 may include a pair of internal electrodes 111a and 112a disposed on the upper and lower sides of the protection sheet layer 113, And are formed so as to be positioned in the overlapping areas.

More specifically, as shown in FIG. 11A, the electric shock protection element 100 '' includes a first sheet layer 111 having a first internal electrode 111a on a lower surface thereof, Wherein at least one through-hole (154) is formed between the first sheet layer (111) and the second sheet layer (112), and a second sheet layer (112) (113).

The first sheet layer 111, the protective sheet layer 113 and the second sheet layer 112 are sequentially stacked so that the first internal electrode 111a and the second internal electrode 112a face each other.

Accordingly, the first internal electrode 111a and the second internal electrode 112a are disposed to face each other and are spaced apart from each other by the protective sheet layer 113 at a predetermined interval, A hole 154 is disposed.

At this time, the through holes 154 arranged in the overlapping region of the first internal electrode 111a and the second internal electrode 112a may be provided in various forms.

As shown in FIG. 11A, the pair of external electrodes 131 and 132 may have a substantially 'C' shape extending in the horizontal direction from the upper and lower ends so as to partially cover the upper and lower surfaces of the body. The distance d3 between the inner electrode provided in the uppermost layer and the lowermost layer and the portion extending in the horizontal direction among the outer electrodes among the plurality of sheet layers is provided to have a distance of at least 15 mu m, Lt; RTI ID = 0.0 > m. ≪ / RTI >

At this time, as shown in FIG. 11B, the electric shock protection element 100 '' may be configured such that the electric shock protection portion 110 and the capacitor portions 120a and 120b have different electrode intervals and electrode widths.

That is, the interval d4 between the pair of internal electrodes 111a and 112a disposed opposite to each other is equal to the interval d1 between the capacitor electrodes 121a, 122a, 123a, 124a, 125a, 126a, Can be the same.

At this time, the interval d5 between the electric shock protection unit 110 and the capacitor units 120a and 120b may be larger than the interval d4 between the pair of internal electrodes 111a and 112a.

That is, it is preferable to ensure a sufficient distance from the internal electrodes 111a and 112a so that the static electricity or leakage current flowing along the pair of internal electrodes 111a and 112a does not leak to the adjacent capacitor electrodes. At this time, the distance between the capacitor units 120a and 120b and the electric shock protection unit 110 may be 15 to 100 mu m and preferably 2 times or more the interval between the pair of internal electrodes 111a and 112a Do. For example, when the gap between the pair of internal electrodes 111a and 112a is 10 占 퐉, the distance between the capacitor units 120a and 120b and the electric shock protection unit 110 may be 20 占 퐉 or more.

The width w1 of the pair of internal electrodes 111a and 112a overlapping each other is smaller than the width w2 of the capacitor electrodes overlapping each other. Here, the thickness of the pair of inner electrodes 111a and 112a may be smaller than the thickness t of the capacitor electrode.

At this time, the first prism body and / or the second prism body may include at least one of Ti, Zn, Ce, Nd and Bi.

When a discharge material layer is applied to a gap formed between the pair of internal electrodes 111a and 112a, the discharge material layer may include at least one of Ti, Ni, Zn, Co, Tc, Zr, La, . ≪ / RTI >

11C, the electric shock protection unit 110 may include a discharge material layer 155 coated on the inner wall of the through hole 154 at a predetermined thickness along the height direction, The filling material 156 may be filled as described above.

In such an electric shock protection device 100 '', the capacitor portions 120a and 120b may be stacked in various ways around the electric shock protection portion 110.

That is, the capacitor portions 120a and 120b are formed by stacking a plurality of sheet layers 121, 122, 123, 124, 125 and 126, and may be stacked only on the upper side of the electric shock protection portion 110 as shown in FIG. As shown in FIG. 4A, the electric shock protection unit 110 may be stacked only on the lower side of the electric shock protection unit 110.

In addition, as shown in FIG. 12C, the plurality of electric shock protection parts 110 may be provided on different layers, and the capacitor parts 120a and 120b may be disposed between the plurality of electric shock protection parts 110 have.

12D, the electric shock protection portion 110 is provided in the same sheet layer with a plurality of through holes 154, and the capacitor portions 121 and 125 made of a single-layer sheet are provided in the electric shock protection portion 110, respectively.

The first internal electrode 111a and the second internal electrode 112a constituting the internal electrode in the body may have various shapes and patterns. The first internal electrode 111a and the second internal electrode 112a may be provided in the same pattern or may have different patterns.

For example, as shown in FIG. 13A, an end portion of a pair of first internal electrodes 111a is provided on the upper side of a bar-shaped second internal electrode 112a having a predetermined length, The first internal electrode 111a and the second internal electrode 112a may be arranged in a substantially Y-shaped region, as shown in FIG. 13B, And they may be arranged in the overlapping areas of the through holes 154 one by one.

In addition, as shown in FIG. 13C, the second internal electrodes 112a are formed in two bar shapes having a predetermined length, and the first internal electrodes 111a are formed in two in a substantially Y shape, And the through holes 154 may be respectively disposed in four portions overlapping with each other.

As shown in FIG. 13D, the first internal electrode 111a and the second internal electrode 112a are formed in a bar shape having a predetermined length, and the through holes 154 are spaced apart from each other by a predetermined distance .

In addition, as shown in FIG. 13E, the second internal electrodes 112a are provided in a single bar shape having a predetermined length, and the first internal electrodes 111a are formed in two bar shapes having a predetermined length And two through holes 154 may be disposed in the overlapping region. The second internal electrode 112a may be formed on the first internal electrode 112a.

The first internal electrode 111a and the second internal electrode 112a may be formed in various shapes and patterns. When the first internal electrode 111a and the second internal electrode 112a are stacked, It should be noted that it is not possible to arrange them to overlap each other.

In another embodiment, as shown in FIG. 14, the electric shock protection device 200 may include a pair of the internal electrodes 114a and 114b horizontally spaced apart from each other by a predetermined distance. That is, the internal electrodes 114a and 114b are disposed apart from each other so as to form a gap in at least a pair of the sheet layers 111 and 112. [ Preferably, the pair of inner electrodes 114a and 114b are arranged at regular intervals in a parallel direction on the same plane.

Here, a gap 164 may be formed between the pair of inner electrodes 114a and 114b. Here, the gap 164 may be formed to have a height greater than the height of the pair of inner electrodes 114a and 114b, and may be formed to be wider than the gap of the pair of the inner electrodes 114a and 114b. If the volume of the air gap 164 is enlarged as described above, even if fine particles are generated from the internal electrodes 114a and 114b during the discharge by the static electricity, since the space between the internal electrodes 114a and 114b is wide, The incidence of defects can be reduced. At this time, it is preferable that the gap is a space in which discharge is started by the pair of internal electrodes 114a and 114b when static electricity flows, and the volume of the gap is set so as to satisfy the immunity against static electricity. For example, the volume of the gap may be 1-15% of the total volume of the electric shock protection element 100. If the volume of the gap is less than 1% of the total volume of the electric shock protection device 200, shorting may occur between the pair of internal electrodes 214a and 214b, and resistance to static electricity may be deteriorated. If the volume of the gap exceeds 15% of the total volume of the electric shock protection device 200, the total volume of the electric shock protection device 200 increases, the mechanical strength is lowered, and distortion and depression Lt; / RTI >

Specifically, the pair of inner electrodes 114a and 114b are spaced apart from each other to form a gap on the upper surface of the first sheet layer 111. [ Here, the gap between the pair of inner electrodes 114a and 114b may be 10 to 100 mu m. The pair of inner electrodes 114a and 114b are pattern-printed on the upper surface of the first sheet layer 111. [

Between the pair of inner electrodes 114a and 114b corresponding to each other, an air gap 164 is provided for protecting static electricity, protecting circuit protection elements and peripheral circuits from overvoltage, and blocking leakage current.

These air gaps 164 are disposed between the pair of inner electrodes 114a and 114b arranged in parallel to each other on the same plane and are provided in a hollow form so that air can be filled, The second sheet layer 112 is laminated.

A plurality of such air gaps 164 may be provided and spaced along the width direction of the internal electrodes 114a and 114b. As described above, when the number of the voids 164 is increased, the discharge path of the static electricity is increased, so that resistance to static electricity can be improved.

At this time, the air gap 164 is formed to have a height exceeding the height from the upper surface of the first sheet layer 111 to the upper end of the internal electrodes 114a and 114b. That is, the cavity 164 according to an embodiment of the present invention is provided to have a height exceeding the total height of the internal electrodes 114a and 114b, so that the volume of the whole cavity 164 can be enlarged.

Accordingly, even when fine particles are generated from the internal electrodes 114a and 114b during the discharge of the static electricity, the occurrence rate of defects caused by the particles can be reduced through the voids 164 having a large space.

At this time, the gap 164 may be formed to extend on the upper surface or the lower surface of the pair of inner electrodes 114a and 114b which are spaced apart from each other.

In addition, the gap 164 may be formed to have the same width as the width of the pair of the internal electrodes 114a and 114b. At this time, the gap 164 is less than the thickness of the pair of the internal electrodes 114a and 114b Can be largely provided.

The air gap 164 is formed by patterning the gap material between the pair of inner electrodes 114a and 114b and then removing the gap material by heat applied in the sintering process. In order to prevent the air gap 164 from being deformed or damaged due to pressure in the process of pressing the air gap material to form a body after stacking the first sheet layer 111 and the second sheet layer 112, Is used.

For this purpose, the cavity material is made of a material which can be decomposed by heat at a high temperature, so that a plurality of sheet layers can be removed in the course of laminating and sintering. For example, the void material may be formed of a material that is decomposed at a temperature range of 200 to 2000 ° C.

At this time, the pair of internal electrodes 114a and 114b may be formed in various shapes and patterns, and may have the same pattern or different patterns.

For example, the internal electrodes 114a and 114b disposed to face each other may be provided in various shapes and patterns such as polygonal, circular, elliptical, spiral, and combinations thereof. The internal electrodes facing each other may be provided in the same pattern and shape, or may have different patterns and shapes.

For example, the pair of inner electrodes 114a and 114b may be formed in a bar shape having a rectangular cross section, and may have a substantially Y shape with an end having a rectangular cross section.

In addition, the pair of inner electrodes 114a and 114b may be provided in a bar shape having an arc shape at an end thereof, or may be provided in a substantially Y shape having an arc shape.

However, the cross-section of the electrode is not limited thereto, and the above-described four shapes may be combined with each other, or the end portions facing each other may be formed in a circular shape, a polygonal shape, a wave shape, I will reveal.

Meanwhile, a gap is formed between the pair of inner electrodes 114a and 114b facing each other at a predetermined interval, and the gap 164 is provided near the center of the gap. At this time, a discharge material layer coated on the inner wall of the gap 164 with a predetermined thickness along the height direction of the internal electrodes 114a and 114b is provided. At this time, it is noted that the discharge material layer may be provided only on the inner wall of the gap 164, but may be coated to cover the open top of the gap 164. That is, the discharge material layer may extend not only the inner wall of the gap 164 but also the open upper end of the gap 164.

The first sheet layer 111 and the second sheet layer 112 constituting the body may directly stack the second sheet layer 112 on the first sheet layer 111, A pair of internal electrodes 114a and 114b formed on the upper surface of the sheet layer 111 and a separate buffer layer corresponding to the height of the gap 164 may be stacked. This buffer layer serves to eliminate a height deviation corresponding to the height of the internal electrodes 114a and 114b and the height of the cavity 164.

15A to 15C, the electric shock protection devices 200 ', 200' 'and 200' '' are formed on the same surface of the protection sheet layer 211 with a pair of internal electrodes 211a And 211b may be spaced apart from each other to form a gap and a through hole 164 may be formed in a gap formed between the pair of internal electrodes.

That is, the through holes 164 are disposed between a pair of internal electrodes 211a and 211b arranged in parallel on the same plane, and are hollow so as to fill the air.

If the first internal electrode 211a and the second internal electrode 211b constituting the electric shock protection unit 210 are disposed on the same surface of the protection sheet layer 211 at a predetermined interval, The electrode 211a and the second internal electrode 211b may be formed in various shapes and patterns.

That is, as shown in 15b, the electric shock protection element 200 '' includes a discharge material layer 165 coated on the inner wall of the through hole 164 with a certain thickness along the height direction .

In addition, as shown in 15c, the through hole 164 of the electric shock protection unit 210 may be filled with the filler 166, as shown in FIG.

With this configuration, the electric shock protection device can variously provide a capacitance suitable for a communication signal of a wireless communication band corresponding to a purpose of use.

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.

10: portable electronic device 12a, 12b, 12c, 12d: conductor
14:
100, 100 ', 100 ", 200, 200', 200", 200 '
111, 112: electric shock protection sheet layer
121, 122, 123, 124, 125, 126, 127, 128:
111a, 112a, 114a, 114b: internal electrodes 131, 132: external electrodes
121a, 122a, 123a, 124a, 125a, 126a, 127a, 128a:
115: void forming members 115a, 115b, 115c, 155, 165:
116, 164: void 154, 164: through hole

Claims (15)

delete delete delete delete delete delete delete An electric shock protection device for connecting a metal case, which is a human contactable conductor of an electronic device including an area used as an antenna,
And a plurality of capacitor electrodes spaced apart from each other in the first main body, wherein the first main body includes at least one of Ti, Zn, Ce, Nd, and Bi, Wherein the communication signal passes through the communication frequency band without attenuation and at the same time improves the blocking ability of the DC component in the leakage current due to the external power supply of the electronic device flowing from the ground of the internal circuitry, At least one capacitor portion having an insulation breakdown voltage higher than the rated voltage; And
A second elementary body disposed on one side of the first elementary body and including at least one of Ti, Zn, Ce, Nd, and Bi, and at least a pair of internal electrodes disposed inside the second elementary element, And a discharge material layer disposed between the pair of inner electrodes and including at least one of Ti, Ni, Zn, Co, Tc, Zr, La, Nd and Pt, And an electric shock protection unit connected to the metal case and passing static electricity flowing from the metal case and blocking the leakage current from being transmitted to the metal case,
Wherein a width at which the pair of internal electrodes overlap each other is smaller than a width at which the plurality of capacitor electrodes overlap each other,
Wherein a thickness of the pair of inner electrodes is smaller than a thickness of the plurality of capacitor electrodes,
Wherein a shortest distance between a free end portion of one end of the plurality of capacitor electrodes that is not connected to the pair of outer electrodes and one of the outer electrodes is at least 15 mu m. 9. The method of claim 8,
Wherein the pair of external electrodes are formed to have a 'C' -shaped cross section extending in a horizontal direction from an upper end and a lower end so as to partially cover upper and lower surfaces of the first main body. An electric shock protection device for connecting a metal case, which is a human contactable conductor of an electronic device including an area used as an antenna,
And a plurality of capacitor electrodes spaced apart from each other in the first main body, wherein the first main body includes at least one of Ti, Zn, Ce, Nd, and Bi, Wherein the communication signal passes through the communication frequency band without attenuation and at the same time improves the blocking ability of the DC component in the leakage current due to the external power supply of the electronic device flowing from the ground of the internal circuitry, At least one capacitor portion having an insulation breakdown voltage higher than the rated voltage; And
A second elementary body disposed on one side of the first elementary body and including at least one of Ti, Zn, Ce, Nd, and Bi, and at least one pair of coplanar elements arranged opposite to each other at a predetermined interval in the second elementary body And a discharge material layer disposed between the pair of inner electrodes and including at least one of Ti, Ni, Zn, Co, Tc, Zr, La, Nd and Pt, And an electric shock protection unit connected in parallel with at least one capacitor for passing static electricity flowing from the metal case and for blocking the leakage current from being transmitted to the metal case,
Wherein a thickness of the pair of inner electrodes is smaller than a thickness of the plurality of capacitor electrodes,
Wherein a shortest distance between a free end portion of one end of the plurality of capacitor electrodes that is not connected to the pair of outer electrodes and one of the outer electrodes is at least 15 mu m. 9. The method of claim 8,
Wherein the electric shock protection unit further includes a gap that is a space in which discharge is initiated by the pair of internal electrodes upon introduction of static electricity. 11. The method according to claim 8 or 10,
Wherein the at least one capacitor portion has a dielectric constant of 20 or more. 13. The method of claim 12,
Wherein the at least one capacitor portion has a dielectric constant of 35 or more. 9. The method of claim 8,
Wherein the first elementary body and the second elementary body comprise ceramics. 11. The method according to claim 8 or 10,
The electric shock protection unit and the at least one capacitor unit pass static electricity flowing from the metal case and block the leakage current caused by the external power source of the electronic device flowing from the ground of the internal circuit unit to the metal case , And a communication signal flowing from a metal case used as the antenna is allowed to pass.
Vbr> Vin, Vcp> Vbr
Here, Vbr is a breakdown voltage of the electric shock protection portion,
Vin is the rated voltage of the external power supply of the electronic device,
Vcp is an insulation breakdown voltage of the capacitor portion,
The rated voltage is the national standard rated voltage

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