KR20170063178A

KR20170063178A - Circuit protection device and mobile electronic device with the same

Info

Publication number: KR20170063178A
Application number: KR1020150169241A
Authority: KR
Inventors: 이승철; 김리언
Original assignee: 주식회사 아모텍
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2017-06-08

Abstract

An electric shock protection device and a portable electronic device having the same are provided. An electric shock protection element disposed between a body contactable conductor of an electronic device of the present invention and a built-in circuit, comprising: a first body; a plurality of first internal electrodes arranged in a line in the first body; And a second internal electrode arranged to be spaced apart from the other electrodes of the internal electrode, and a second internal electrode disposed on one side of the first body of the electric shock protection element for passing a communication signal flowing from the electric conductor, Wherein at least one of the first and second bodies is formed by stacking a plurality of sheet layers, and the plurality of sheet bodies are stacked and arranged so that at least one of the plurality And a plurality of sheet layers including sheet layers including the same dielectric material among the plurality of sheet layers. Accordingly, there is an advantage that the user and the internal circuit can be protected from the leakage current and the static electricity caused by the external power source. Also, data loss can be reduced in a wide frequency band.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shock protection device and a portable electronic device having the same. More particularly, the present invention relates to an electric shock protection device that protects a user from a leakage current by a power source and protects an internal circuit from external static electricity, To an electric shock protection device capable of preventing data loss 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, There is a fear of wearing. Accordingly, a portable electronic device such as a cellular phone employing a metal case is required to protect the user from such a leakage current.

On the other hand, a conventional device having a function of protecting an internal circuit or a function of cutting off a leakage current in the above-mentioned high-voltage static electricity is a device in which a capacitance is increased to prevent signal delay or distortion on a data line transmitting a high- (For example, a device having a low electrostatic capacitance of less than 1 pF) has been used. However, a normal device having a significantly low capacitance remarkably increases data loss in a communication frequency band of an electronic device having the device, .

Accordingly, an electrostatic discharge preventing function prevents static electricity having an instantaneous high voltage from flowing from the outside through the conductor to destroy the internal circuit, and a leakage current preventing flow of the leakage current through the conductor, It is urgently required to develop a device capable of preventing data loss in a wide frequency band.

KR 0573364 B

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a power supply circuit capable of simultaneously protecting an internal circuit and / or a user from a leakage current caused by static electricity or an external power supply, An object of the present invention is to provide an electric shock protection device and a portable electronic device having the same.

One aspect of the present invention provides an electric shock protection device. The electric shock protection device is disposed between a body contactable conductor of an electronic device and an internal circuit portion. The electric protection element includes a first body, a plurality of first internal electrodes arranged in a line in the first body, 1) an electric shock protection unit comprising a first internal electrode and a second internal electrode spaced apart from another column; And a capacitor electrode disposed inside the second elementary body so that at least some of the surfaces of the second elementary body and the electrode are overlapped with each other, the capacitor element being disposed inside the second elementary body so as to pass a communication signal flowing from the conductor, A capacitor portion including a capacitor; Wherein the second elementary body has a plurality of groups each including a plurality of sheet layers arranged in a laminated manner and sheet layers including the same dielectric material among the plurality of sheet layers.

The plurality of groups included in the second elementary body may include a first group and a second group, and the sheet layers belonging to the first group and the sheet layers belonging to the second group may be alternately stacked.

In addition, the group 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 to _{2, BaTiO 3, Nd 2 O} 3, SiO 2, TiO 2, ZnO, SrTiO 3, LiNbO 3, LiTaO 3, Mn oxide, Ni oxide, Mn oxide, Al ₂ O ₃ and their solid solutions at least one selected from the group consisting of, SiC, CdTe, TiC, TiN, B ₄ C, Si ₃ N _4, BN, TiB _2, and made of AlN group certificate selected at least one, or, Ni-Zn ferrite, and Mn -Zn-based ferrite, and the like.

In addition, it is possible to pass the static electricity without breaking the insulation when the static electricity flows from the conductor, and to prevent the leakage current of the external power source flowing from the ground of the circuit part.

Vbr> Vin

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

Also, Vcp > Vbr, where Vcp may be the dielectric breakdown voltage of the capacitor portion.

Also, the capacitor unit may be electrically connected in parallel with the electric shock protection unit.

In addition, the communication signal may have a wireless communication frequency band.

The distance between the capacitor portion and the electric shock protection portion may be a distance between the first inner electrode and the second inner electrode, which is disposed adjacent to the second inner electrode of the plurality of first inner electrodes, d1, d2).

Also, the distance between the capacitor portion and the electric shock protection portion may be 15 to 100 mu m.

The thickness of the capacitor electrode may be 2 to 10 mu m.

In addition, the interval between the capacitor electrodes may be 15 to 100 mu m.

Another aspect of the present invention provides a portable electronic device having an electric shock protection function. The portable electronic device comprising: a human contactable conductor; Circuitry; And an electric shock protection element disposed between the conductor and the circuit portion, wherein the electric shock protection element includes a first elementary body, a plurality of first inner electrodes disposed in a line in the first elementary body, An electric shock protection unit including a second internal electrode spaced apart from an electrode and another column; And a capacitor electrode disposed inside the second elementary body so that at least some of the surfaces of the second elementary body and the electrode are overlapped with each other, the capacitor element being disposed inside the second elementary body so as to pass a communication signal flowing from the conductor, A capacitor portion including a capacitor; Wherein the second elementary body has a plurality of groups each including a plurality of sheet layers arranged in a laminated manner and sheet layers including the same dielectric material among the plurality of sheet layers.

In addition, in order to pass the static electricity through the static electricity from the conductor and prevent the leakage current of the external power source flowing from the ground of the circuit part, and to pass the communication signal without being insulated from the static electricity, Can be satisfied.

Vbr> Vin, Vcp> Vbr

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

In addition, the capacitor unit may be provided at least one of the upper and lower portions of the electric shock protection unit, or at least one of both the upper and lower portions of the electric shock protection unit at regular intervals.

In addition, the conductor may include at least one of an antenna, a metal case, and conductive ornaments for communication between the electronic device and an external device.

In addition, the metal case may be provided to partially surround or entirely surround the side of the housing of the electronic device.

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.

According to an embodiment of the present invention, there is provided an electric shock protection device and a portable electronic device including the electric shock protection device. The electric shock protection device includes the electric shock protection unit including the dissimilar materials, thereby protecting the user and the internal circuit from leakage current and static electricity There are advantages. Also, data loss can be reduced in a wide frequency band.

1 is a perspective view of an electric shock protection device according to an embodiment of the present invention. FIG. 1B is an exploded perspective view of an electric shock protection unit included in an electric shock protection device, and FIG. 1C is a longitudinal sectional view of FIG. 1A,
2 is a longitudinal sectional view of an electric shock protection device according to an embodiment of the present invention,
FIG. 3 is a view showing an electric shock protection unit included in an embodiment of the present invention. FIG. 3 (a) is an exploded perspective view of the electric shock protection unit, FIG. 3
FIG. 4 is a perspective view of an electric shock protection unit included in an embodiment of the present invention, FIG. 4A is an exploded perspective view of the electric shock protection unit, FIG. 4B is a longitudinal sectional view of FIG.
FIG. 5 is a longitudinal sectional view of an electric shock protection unit included in an embodiment of the present invention, FIGS. 5A and 5B are diagrams illustrating various positional relationships of internal electrodes included in the electric shock protection unit,
6A and 6B are views showing various arrangements of the electric shock protection unit and the capacitor unit in the electric shock protection device according to the embodiment of the present invention,
7A to 7E are views showing various forms of a capacitor portion made of dissimilar materials in an electric shock protection device according to an embodiment of the present invention,
8A to 8E are conceptual diagrams showing an application example of an electric shock protection device according to an embodiment of the present invention,
FIGS. 9A to 9C are schematic circuit diagrams for explaining operations of (a) leakage current, (b) static electricity (ESD), and (c) communication signals of the electric shock protection device according to the embodiment of the present invention, and
FIGS. 10A and 10B are graphs showing the simulation results of the pass frequency band according to the capacitance.

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.

1A to 1C, an electric shock protection device 100 according to an embodiment of the present invention includes a first varistor sheet layer 111 and a second varistor sheet layer 112 formed by stacking a first varistor sheet layer 111 and a second varistor sheet layer 112, An electric shock protection unit 110 including a plurality of internal electrodes 111a, 111b and 112a and a plurality of capacitor units 120a and 120b for passing a communication signal flowing into the electric conductor without further attenuation, , And the electric shock protection unit 110 may be, for example, a varistor.

The electric shock protection element 100 is disposed between the human-contactable conductor of the electronic device and the internal circuit part, passes the static electricity without being broken down in insulation when the static electricity flows from the electric conductor, and the leakage current The following conditions can be satisfied for this purpose:

Vbr> Vin where Vbr is the sum of the breakdown voltages formed between the nearest first internal electrodes 111a and 111b and the second internal electrode 112a and Vin is the rated voltage of the external power supply of the electronic device. The rated voltage may be a standard rated voltage for each country, for example, 240V, 110V, 220V, 120V, 110V, and 100V.

At this time, the first core bodies 111 and 112 include a first varistor sheet layer 111 having first internal electrodes 111a and 111b formed on at least one surface thereof and a second varistor sheet body 111 having at least one surface formed with second internal electrodes 112a. The sheet layers 112 may be alternately stacked and then integrally formed through a squeezing and sintering process.

The first elementary body 111 and the second element 112 may be formed through a varistor composition so as to realize a varistor type electric shock protection unit. There is no limitation to the varistor composition, and a known varistor composition may be used. For example, the first core bodies 111 and 112 may be formed by laminating a plurality of sheet layers 111 and 112 formed through a varistor composition, and sintering the same. The plurality of sheet layers 111 and 112 may be formed of the same varistor composition, or may be formed of at least two varistor compositions, respectively. The sheet layers 111 and 112 may be alternately stacked, May be stacked or randomly stacked.

The varistor composition may include a varistor forming component, and may further include a binder, a curing agent, a solvent, and the like. The varistor forming component may include at least one of a semiconductive material, a Pr-based material, and a Bi-based material including at least one of ZnO, SrTiO ₃ , BaTiO ₃ , and SiC. The average particle diameter of the varistor forming component powder may be 0.1 to 5 占 퐉, for example, 0.1 to 1 占 퐉. If the average particle diameter of the powder is less than 0.1 占 퐉, there may be a problem of greatly increasing the manufacturing cost. If the average particle diameter exceeds 1 占 퐉, if two or more kinds of varistor forming components are mixed for controlling the sintering temperature, It may not be uniformly mixed and there may be a problem that the second sintered body does not have a proper volume shrinkage ratio after sintering.

Accordingly, the varistor forming component may be pulverized through mechanical milling or the like so as to have an aimed average particle size before mixing with the binder, and then dried. The drying process may be performed at a temperature of 50 to 200 ° C for 30 minutes to 10 hours, but is not limited thereto. After the drying process, the final dielectric powder can be prepared by further pulverizing to have the desired average particle size.

The binder can be used without limitation in the case of a binder used for producing a known green sheet, and as a non-limiting example thereof, a polyvinyl butyral resin, a polyvinylacetate resin, and a polyacrylic resin And the like. The binder may be mixed in an amount of 1 to 30 parts by weight based on the total weight of the varistor forming component and the binder. If the binder is contained in an amount of less than 1 part by weight, the binder strength of the varistor-forming component is lowered, and the mechanical strength of the body may be considerably lowered even after sintering. In addition, if the binder is contained in an amount exceeding 30 parts by weight, the air permeability of the sheet itself after being manufactured into a sheet form is not good, and an internal air trap may occur when a thick film staking method is applied. And the adhesion may be increased even with a small amount of moisture, and workability may be deteriorated, and volume shrinkage during drying of the sheet is remarkable, and there is a possibility that the sheet bends or the quality of the surface is deteriorated.

Further, the solvent may be water, a known organic solvent, and may vary depending on the specific kind of the binder selected, so that the present invention is not particularly limited thereto.

The method for producing a single sheet layer through the varistor composition described above will be briefly described. The varistor composition can be formed into a sheet shape through press molding. The press molding may be carried out using a general press molding method used in the art. For example, the granules are put into a molding mold having a diameter of 7.0 to 10.0 mm, and a pressure of 800 to 1,200 kg / cm < 3 & A press molded product to be manufactured can be produced.

The first inner electrodes 111a and 111b and the second inner electrodes 112a are formed on the first varistor sheet layer 111 and the second varistor sheet layer 112 on one surface of the sheet produced by the press molding, The internal electrodes 111a, 111b, and 112a may be formed by a known method. The present invention is not limited thereto. For example, the internal electrodes 111a, 111b, and 112a may be formed by applying, And the like.

The prepared first varistor sheet layer 111 and the second varistor sheet layer 112 may be laminated so as to have a desired electrode arrangement and then be formed into a sintered body through a sintering process and further subjected to a sintering process before the sintering process . The sintering process can be performed through electric sintering using silver (Ag) electrodes, and the sintering process can be performed at 850 ° C to 950 ° C, preferably 880 ° C to 940 ° C. If the temperature is lower than 850 DEG C, there may be a problem that sintering does not occur smoothly. If the temperature is higher than 950 DEG C, the internal electrode material of the sintering machine is changed to silver-palladium (Ag-Pd) It is preferable to carry out the sintering process at the above temperature. However, the sintering process may be carried out by changing the varistor material in accordance with the type of the varistor forming component, the kind of the binder, and the material of the internal electrode included in the varistor sheet layer. no. The electric shock protection device 100 including the electric shock protection unit 110 in which the first elementary bodies 111 and 112 are integrally formed through the above-described method can be implemented. At this time, it is preferable to set the particle diameter of the sintered particles contained in the varistor sheet layer after sintering so as to satisfy the breakdown voltage (Vbr).

The internal electrodes included in the first body 110 and the first varistor sheet layer 111 are formed on the first varistor sheet layer 111 and the first internal electrodes 111a and 111b, 112 formed on the first and second inner electrodes 112a, 112b.

The internal electrodes 111a, 111b, and 112a may be any conventional electrode material, and may include any one or more of Ag, Au, Pt, Pd, Ni, and Cu. , Ag / Pd. The first inner electrodes 111a and 111b and the second inner electrodes 112a may have a thickness of 2 to 10 탆. If the thicknesses of the first and second inner electrodes 111a and 111b and the second inner electrode 112a are less than 2 m, they can not serve as the inner electrode. If the thickness is more than 10 m, The thickness of the inner electrode or varistor sheet layer arranged in parallel increases, and the overall size of the electric shock protection device 100 increases, which may adversely affect miniaturization.

The breakdown voltage Vbr of the electric shock protection device 100, more specifically, the electric shock protection unit 110 is a unit breakdown voltage (Vbr) formed between the first adjacent first internal electrodes 111a and 111b and the second internal electrode 112a, Voltage. That is, the breakdown voltage Vbr of the electric shock protection unit 110 is a unit breakdown voltage formed between the first internal electrodes 111a and 111b and the second internal electrode 112a, May be determined according to the number of the electrodes 111a and 111b and the number of the second internal electrodes 112a. 1A through 1C, the unit devices (unit breakdown voltages) formed by the first inner electrodes 111a and 111b and the second inner electrodes 112a are two, but the present invention is not limited thereto. And may be formed in a plurality of sizes.

The first internal electrodes 111a and 111b and the second internal electrodes 112a may be arranged in a line so that at least a part of the first internal electrodes 111a and the second internal electrodes 112a overlap with each other. Or alternately disposed between each other so as not to overlap with each other.

At this time, the first internal electrode or the second internal electrode does not leak static electricity or leakage current to adjacent external electrodes (not shown) of the internal electrodes 111a, 111b, and 112a, It is preferable that the interval is set so as to proceed normally.

For example, a distance L between any two first internal electrodes 111a and 111b disposed adjacent to and closest to the second internal electrode 112a of the plurality of first internal electrodes 111a and 111b, May be formed to be larger than the sum of the shortest distances d1 and d2 between the two first inner electrodes 111a and 111b and the second inner electrode 112a.

The distance between the second internal electrode 112a and the adjacent external electrodes 131 and 132 may be greater than the distance between the first internal electrodes 111a and 111b.

More specifically, the first varistor sheet layer 111 may include two first internal electrodes 111a and 111b, and the two first internal electrodes 111a and 111b may be arranged on the same plane As shown in FIG. The second varistor sheet layer 112 may include at least one second internal electrode 112a on one surface thereof.

At this time, the first varistor sheet layer 111 and the second varistor sheet layer 112 are stacked in the vertical direction so that the second internal electrode 112a forms a different row from the two first internal electrodes 111a and 111b The first varistor sheet layer 111 and the second varistor sheet layer 112 may be stacked in the upward and downward directions.

In addition, the second internal electrode 112a may be disposed such that both end portions thereof overlap with one end side of the first internal electrodes 111a and 111b. For this purpose, the center of the second internal electrode 112a may be located at the center of the gap L1 formed between the two first internal electrodes 111a and 111b.

Here, the first varistor sheet layer 111 in which the two first internal electrodes 111a and 111b are formed is stacked on the second varistor sheet layer 112 in which one second internal electrode 112a is formed Or may be laminated to the bottom of the second varistor sheet layer 112, as shown in FIG.

When the plurality of sheets are stacked, the electric shock protection portion 210 may be stacked such that the second varistor sheet layer 212 is interposed between the first varistor sheet layers 211 as shown in FIG. 3A, A varistor sheet layer in which internal electrodes are not formed above and below the sheet layer 211 may be further laminated. 3B, the distance between the first internal electrodes 211a and 211b may be greater than the sum of distances between the first internal electrodes 211a and 211b and the second internal electrodes 212a.

4A, the first and second varistor sheet layers 211 and 211 may be laminated so that the first varistor sheet layer 211 is interposed between the second varistor sheet layers 212, And a varistor sheet layer on which an internal electrode is not formed may be further laminated. 4B, the distance between the first internal electrodes 211a and 211b is larger than the sum of the distances between the first internal electrodes 211a and 211b and the second internal electrodes 212a at the upper portion and / .

The external electrodes 131 and 132 may be formed on the outer surfaces of the first and second bodies 110 and 112 so as to be electrically connected to the internal electrodes 111a and 111b and 112a. For example, And may be formed to cover both the top and bottom surfaces of both ends and both ends of the body as shown in Fig.

The outer electrodes 131 and 132 may be formed by applying a composition for forming an outer electrode to the outer surfaces of the first bodies 111 and 112 that can be electrically connected to the inner electrodes 111a, 111b, and 112a, and then sintering. The composition for forming an external electrode may be used without limitation as long as it is an external electrode forming composition provided in a conventional varistor. However, it may preferably include a conductive component and a glass component, and the mechanical strength and durability of the electric shock protection device can be remarkably improved by improving the adhesive strength according to the increase in material compatibility with the body through the glass component .

The conductive component may include at least one selected from the group consisting of Ag, Au, Cu, Ni, Pd, and Pt. The conductive component may be included in the composition as a granule, wherein the average particle size of the conductive component may be 0.1 to 10 탆.

The binder component may be used without limitation in the case of conventional binders used for producing external electrodes, and as a non-limiting example, polyvinylbutyral resin, polyvinylacetate resin, ethyl cellulose , Nitrocellulose, polyacrylic resin, and the like.

In addition, the above-mentioned solvent can be used without limitation in the case of ordinary water or organic solvent which does not affect the above-mentioned conductive component and glass component to be used, and which does not cause problems in dissolving additives such as a binder component and other dispersant. As a non-limiting example, butoxyethoxy ethyl acetate), ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol monobutyl ether, propylene glycol monoethyl ether propylene glycol monomethyl ether, diethylene glycol methyl ether, glycerol, diethylene glycol ethyl ether acetate, terpineol, menthol, ), Diethylene glycol methyl ethyl ether (MEDG), and butyl diglycol (BDG), which may be used alone or in combination.

The outer electrode may further include a plating layer (not shown) on the surface of the electrode to further improve ease of soldering and electrical connection when the device is mounted on a circuit board by flow soldering or the like. The plating layer may be formed using a conventional plating method, and may include at least one of metals such as nickel, tin, copper, and tin-lead alloys. At this time, when two or more kinds of metals are included, two or more kinds may be included in one layer in the form of a mixture or an alloy, or a plating layer may be formed of a plurality of layers and each layer may be formed of one kind of metal . The thickness of the plating layer may be 0.1 to 5 탆, but is not limited thereto.

Meanwhile, a glass coating layer (not shown) may be formed on the outer surface of the elementary body including at least a contact region (A 'in FIG. 1A) between the first elementary bodies 111 and 112 and the external electrodes 131 and 132, May be formed on the entire surface of the body exposed to the outside.

The glass coating layer prevents the peeling of the elementary body, which may be formed by stacking a plurality of sheets, between the sheets, thereby improving the mechanical strength of the elementary body and further enhancing the adhesive force between the outer electrode and the elementary body. It is possible to prevent the plating solution from penetrating into the inside of the element body in the step of forming the plating layer which can be further included in the outer surface.

Meanwhile, since the external electrodes 131 and 132 may be formed on the external surface of the body after the glass coating layer is formed, the glass coating layer is interposed between the external electrodes 131 and 132 and the first body 111 and 112.

The capacitor portions 120a and 120b cut off the leakage current of the external power source, in particular, the DC component. The capacitor portions 120a and 120b allow the communication signal flowing from the conductor 12 to pass therethrough without being insulated from the static electricity flowing into the conductor 12 Can be satisfied: < RTI ID = 0.0 >

Vcp > Vbr where Vbr is the breakdown voltage of the electric shock protection element, and Vcp is the breakdown voltage of the capacitor portion.

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 included at one side of the first elementary body, specifically, at the top and / or bottom of the first elementary body, Or may be located at the upper or lower position. The dielectric breakdown voltage (Vcp) of the capacitor portion is used to prevent the leakage current, especially the DC component, of the external power source, which flows from the ground of the circuit portion, Specifically, the breakdown voltage Vbr of the electric shock protection unit. At this time. The dielectric breakdown voltage Vcp of the capacitor units 120a and 120b is formed at both ends of the capacitor electrode included in the capacitor unit. In the case of a capacitor unit having a plurality of capacitor electrodes spaced apart from each other, Are formed between the respective capacitor electrodes as they are connected in parallel.

3B, the capacitor units 120a and 120b may be disposed on the upper and lower portions of the electric shock protection unit 110. Among them, the first capacitor unit 120a may include a capacitor electrode on one surface thereof A plurality of capacitor electrodes 121a, 122a, 123a, and 124a provided on one surface of each of the plurality of sheet layers 121, 122, 123, and 124 are sequentially stacked on top of the electric shock protection unit 110, Or may be integrally formed by forming a second body through a curing process. The second capacitor portion 120b also includes a plurality of sheet layers 125, 126, 127, and 128 stacked so that the capacitor electrodes 125a, 126a, 127a, and 128a are opposed to each other below the electric shock protection portion 110, The first capacitor unit 120a and the second capacitor unit 120b may be simultaneously sintered or cured to form a second body of each of the first capacitor unit 120a and the second capacitor unit 120b at different positions have. Alternatively, the second body may be formed by disposing the electrodes so as to have the electrode structures of the capacitor portions 120a and 120b in one sheet, and then sintering or curing the electrode.

In this case, the second elementary body is formed by stacking a plurality of sheet layers 121, 122, 123, 124, 125, 126, 127, 128 and a plurality of groups of sheet layers 121, 122, 123, 124, 125, 126, 127, 128 including the same dielectric material Respectively. That is, the plurality of sheet layers include at least two kinds of dielectric materials. At this time, different dielectric materials can remove noise in different frequency bands. Thus, since at least two types of dielectric materials are included in the first prism, data loss due to noise can be reduced in a wide frequency band.

That is, in the electric shock protection device 100, a plurality of sheet layers constituting each of the second elementary bodies may be made of different kinds of ceramic materials. Specifically, at least one of the plurality of sheet layers forming the second element body may use the first ceramic material, and the remaining sheet layer may use the second ceramic material.

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.

As shown in Figs. 7A to 7E, the plurality of sheet layers constituting the capacitor portion 120 may be made of different kinds of ceramic materials.

More specifically, at least one of the plurality of sheet layers constituting the capacitor section 120 may use the first ceramic material (A), and the remaining sheet may use the second ceramic material (B).

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.

Meanwhile, in the capacitor portion 120 made of a different type of ceramic material in the electric shock protection device 100 "according to the embodiment of the present invention, the first and second ceramic materials of different types are connected to the electric shock protection portion 110 As shown in FIG.

As shown in FIG. 7A, the capacitor portion 120 connected to the upper part or the lower part of the electric shock protection part 110 is made of the first ceramic material A, and the capacitor located at the uppermost layer and the lowermost layer of the electric shock protection element 100 " The portion 120 may be made of the second ceramic material B. [

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

7A to 7D 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. 8A to 7D, reference numerals A and B refer to the material of the sheet.

More specifically, as shown in FIG. 7B, the entire plurality of sheet layers constituting the capacitor portion 120 may be formed of one of the first ceramic material A or the second ceramic material B.

7C and 7D, some of the plurality of sheets constituting the capacitor portion 120 are made of the first ceramic material A, and one of the plurality of sheets constituting the capacitor portion 120 And the remaining sheet may be made of a different second ceramic material (B).

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 kind of ceramic material, By arranging the capacitor portions 120a and 120b at appropriate positions, the capacitor portions 120a and 120b can be formed of a material having a high dielectric constant to realize desired characteristics, and the characteristics can be freely changed according to required characteristics.

For example, as shown in FIGS. 7A to 7D, when the second ceramic material, which is a different type of ceramic material, is disposed in the capacitor portions 120a and 120b, the sheet constituting the capacitor portions 120a and 120b may be made of a high- The more desirable characteristics can be realized in forming the capacitance.

7E, at least one intermediate sheet layer 130 may be disposed between the electric shock protection unit 110 and the capacitor unit 120 and the intermediate sheet layer 130 may be disposed between the capacitor unit 120 and the capacitor unit 120, And a second ceramic material (B) identical to the first ceramic material (B). Here, the intermediate sheet layer 130 may be a separate sheet layer, or may be a buffer layer.

With this configuration, the electric shock protection element 100 " can provide a variety of capacitances suitable for the communication signal of the wireless communication band corresponding to the object to be used.

In order to prevent attenuation of a communication signal passing through the second elementary bodies 121, 122, 123, 124, 125, 126, 127, and 128, the dielectric constant may be 20 F / m or higher, preferably, the dielectric constant may be 35 F / m or higher, The communication signal passing through the electric shock protection element is allowed to pass through the element without attenuation and at the same time the blocking ability of the DC component in the leakage current of the capacitor portion is improved and a breakdown voltage And may not be destroyed by leakage current or 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 total capacitance, the distance between the electrodes must be remarkably narrowed. If there is a defect (including pores or cracks) in a body located between the electrodes, It may be highly undesirable to combine the capacitor portion designed with the electric-shock protection portion so that the distance between the electrodes is remarkably narrowed due to the fear that the breakdown may be remarkably 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 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 second 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 Respectively.

1, 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, when the second element body having a dielectric constant of 20 F / m or more is included, 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. [

Meanwhile, the above-described electric shock protection unit 110 and the capacitor units 120a and 120b are electrically connected to each other in parallel so that the first elementary body is disposed on one side of the second elementary body, thereby realizing an electric shock protection element. 1, the first elementary body may be disposed between the second elementary bodies 121, 122, 123 and 124 of the first capacitor unit 120a and between the second elementary bodies 125, 126, 127 and 128 of the second capacitor unit 120b, The capacitor electrodes 121a, 122a, 123a, 124a, 125a, 126a, 127a, and 128a of the first internal electrodes 111a and 111b and the second internal electrode 112a of the protection unit 110 and the capacitor electrodes 120a and 120b May be electrically connected to the external electrodes 131 and 132 provided at both ends of the stacked second elementary body and the first elementary body, respectively. 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.

The distance between the capacitor units 120a and 120b and the electric shock protection unit 110 is determined by the shortest distance between the first internal electrode 111a and the second internal electrode 112a, May be greater than the sum of the shortest distance between the electrode 111b and the second internal electrode 112a. That is, a sufficient gap is secured between the internal electrodes 111a, 111b and 112a so that static electricity or leakage current flowing along the first internal electrodes 111a and 111b or the second internal electrodes 112a does not leak to the adjacent capacitor electrodes . The distance between the capacitor unit 120a and the electric shock protection unit 110 will be described with reference to FIG. 1. The distance between the capacitor electrode 120a and the electric shock protection unit 110 is the closest to the electric shock protection unit 110 among the plurality of capacitor electrodes included in the capacitor unit 120a. Means the distance between the capacitor electrode 121a located nearest to the internal electrode 112a and the nearest internal electrode 112a or 112b among the internal electrodes provided in the electric shock protection unit 110. [ At this time, the distance between the capacitor units 120a and 120b and the electric shock protection unit 110 may be 15 to 100 m, and the distance between the first internal electrodes 111a and 111b and the second internal electrodes 112a It is preferable that the interval is two times or more larger than the interval. For example, when the interval between the first internal electrodes 111a and 111b and the second internal electrode 112a is 10 m, the distance between the capacitor portions 120a and 120b and the electric shock protection portion 110 is Or more.

Meanwhile, the electric shock protection unit 110 and the capacitor units 120a and 120b may be formed by stacking a plurality of sheet layers forming a second elementary body in a case where the element body included in each of the electric shock protection unit 110 and the capacitor units 120a and 120b is formed by sintering after a single- A plurality of sheet layers for forming a first sintered body are laminated on the first sintered body, and a plurality of sheet layers for forming a second sintered body on the first sintered body are stacked to form a second sintered body, An integrated electric shock protection device can be realized. Or the second sintered body formed by sintering and the first sintered body 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.

1B, the glass coating layer 142 including the capacitor portions 120a and 120b may be formed on the exposed surface of the body including the first and second bodies, May be formed to include at least surface (A) where external electrodes are formed and come into contact with the elementary body. Preferably, the first elementary body and the second elementary body are stacked in order to protect the inside of the element from the mechanical strength of the elementary body and the plating liquid A glass coating layer 142 may be formed on the exposed front surface.

6 to 7, various embodiments of the electric shock protection device according to the embodiment of the present invention will be described in more detail. As shown in FIG. 6A, the electric shock protection device 100 ' A plurality of electric shock protection units 110 may be provided in the up / down direction of the unit 120. [ At this time, the internal electrodes of the electric shock protection unit 110 and the capacitor electrodes of the capacitor unit 120 may have the same gap between the electrodes facing each other, but as shown in FIG. 6B, . That is, the intervals d1 and d2 between the adjacent internal electrodes of the electric shock protection unit 110 and the interval between the adjacent capacitor electrodes of the capacitor unit 120 are the same, And the interval d3 between the capacitor electrodes of the adjacent capacitor portions 120 may be larger than the interval between the internal electrodes or the capacitor electrodes.

In addition, the number of the capacitor unit 120 and the electric shock protection unit 110 constituting the electric shock protection device 100 'is not limited and may be provided in various numbers in order to secure resistance against a desired capacitance and static electricity, The stacking relationship of the capacitor 110 and the capacitor 120 may be variously changed.

The above-described electric shock protection devices 100, 100 ', 100 ", and 200 can be disposed in the portable electronic device 10 between the electric conductor 12 such as an external metal case and the circuit part 14, have.

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, . &Lt; / 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 a plurality of metal cases are provided, each of the metal cases 12a, 12b, 12c, and 12d may be embedded in the housing of the portable electronic device 10 such that the anti- 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. 8A, 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. 8B, 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.

8C, the electric shock protection device 100 may be disposed through a matching circuit (for example, 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. 8D, the electric shock protection device 100 may be disposed between a metal case 12 'having an antenna and an IC 14c implementing a 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.

8E, 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 a different function depending on a leakage current due to an external power source and a static electricity and a communication signal flowing from the electric conductor 12, as shown in Figs. 9A to 9C.

9A, when the leakage current of the external power source flows into the conductor 12 through the circuit board of the circuit part 14, for example, the ground, the electric shock protection element 100 is notified of the breakdown voltage (Vbr) is larger than the overvoltage due to the leakage current, it can be kept open. That is, since the total 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 shock 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. [

Further, as shown in Fig. 9B, when 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 varistor. That is, since the breakdown voltage Vbr of the electric shock protection unit 110 is smaller than the instantaneous voltage of the static electricity, the electric shock protection element 100 can be electrically conducted to pass the static electricity. As a result, since the first internal electrodes 111a and 111b and the second internal electrode 112a are provided in the varistor material layer, the non-linear voltage characteristic of the varistor material when the static electricity flows from the conductor 12 The electrical resistance between the first internal electrodes 111a and 111b and the second internal electrode 112a is lowered, and the static electricity can pass therethrough without being electrically broken down.

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, 120b, and can be passed only 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. 9C, when a communication signal flows through the conductor 12, the electric shock protection element 100 functions as a capacitor. That is, the electric shock protection device 100 is configured such that 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 . Thus, 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. 10A and 10B, according to the simulation result of 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 second element body having the permittivity of 40 F / To 2.6 GHz), and exhibits an electrically short circuit phenomenon.

However, as shown in FIG. 10B, it can be seen that the capacitance of the capacitor portion is less affected by the reception sensitivity 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.

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: circuit parts 100, 100 ', 100 ", 200:
110, 210: an electric shock protection part 120: a capacitor part
111, 112: varistor sheet layer
111a, 111b, 112a: internal electrodes

Claims

An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
An electric shock protection unit comprising a first element, a plurality of first internal electrodes arranged in a line within the first element, and a second internal electrode spaced apart from the first internal electrode by a distance from the first internal electrode; And
And a capacitor electrode disposed inside the second elementary body so that at least a part of the second elementary body and the electrode overlap with each other, the capacitor element being disposed in the first elementary body of the shielding protection element for passing a communication signal flowing from the conductor, A capacitor portion; , &Lt; / RTI &
Wherein the second elementary body has a plurality of groups each including a plurality of sheet layers stacked and including sheet layers including the same dielectric material among the plurality of sheet layers.

The method according to claim 1,
The plurality of groups included in the second elementary body include a first group and a second group,
Wherein the sheet layers belonging to the first group and the sheet layers belonging to the second group are alternately laminated.

The method according to claim 1,
Said set 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, the group consisting of Mn-based oxide, Ni oxide, Mn oxide, Al ₂ O ₃ and their solid solutions of the selected one or more, SiC, CdTe, TiC, TiN, B ₄ C, Si ₃ N _4, BN, TiB _2, and made of AlN group certificate selected at least one, or, Ni-Zn ferrite, and Mn-Zn Based ferrite; and at least one selected from the group consisting of ferrite and ferrite.

The method according to claim 1,
An electric shock protection element satisfying the following expression: < EMI ID = 1.0 > wherein: the electric current is passed through the conductor without passing through the dielectric breakdown, and the leakage current of the external power source,
Vbr> Vin
Here, Vbr is the breakdown voltage of the electric shock protection element, and Vin is the rated voltage of the external power supply of the electronic device.

The method according to claim 1,
Vcp > Vbr, wherein Vcp is an insulation breakdown voltage of the capacitor section.

The method according to claim 1,
Wherein the capacitor unit is electrically connected in parallel with the electric shock protection unit.

The method according to claim 1,
Wherein the communication signal has a wireless communication frequency band.

The method according to claim 1,
The distance between the capacitor portion and the electric shock protection portion may be a distance between the first inner electrode and the second inner electrode disposed nearest to the second inner electrode of the plurality of first inner electrodes, d2) greater than the sum.

The method according to claim 1,
Wherein a distance between the capacitor portion and the electric shock protection portion is 15 to 100 mu m.

The method according to claim 1,
Wherein the thickness of the capacitor electrode is 2 to 10 mu m.

The method according to claim 1,
Wherein an interval between the capacitor electrodes is 15 to 100 mu m.

Human contactable conductors;
Circuitry; And
And an electric shock protection element disposed between the conductor and the circuit portion,
An electric shock protection unit comprising a first element, a plurality of first internal electrodes arranged in a line within the first element, and a second internal electrode spaced apart from the first internal electrode by a distance from the first internal electrode; And
And a capacitor electrode disposed inside the second elementary body so that at least a part of the second elementary body and the electrode overlap with each other, the capacitor element being disposed in the first elementary body of the shielding protection element for passing a communication signal flowing from the conductor, A capacitor portion; , &Lt; / RTI &
Wherein the second elementary body has a plurality of groups each including a plurality of sheet layers stacked and composed of sheet layers including the same dielectric material among the plurality of sheet layers.

13. The method of claim 12,
Wherein the static electricity is passed through the conductor without passing through the dielectric breakdown and the leakage current of the external power source flowing from the ground of the circuit part is cut off and the communication signal is passed through without passing through the dielectric breakdown from the static electricity A portable electronic device having an electric shock protection function:
Vbr> Vin, Vcp> Vbr
Here, Vbr is the breakdown voltage of the electric shock protection device, Vin is the rated voltage of the external power supply of the electronic device, and Vcp is the breakdown voltage of the capacitor.

13. The method of claim 12,
Wherein the capacitor unit has an electric shock protection function that is provided on at least one of the upper and lower portions of the electric shock protection unit, or both the upper and lower portions of the electric shock protection unit at regular intervals.

13. The method of claim 12,
Wherein the conductor has at least one of an antenna, a metal case, and a conductive ornamental for communication between the electronic device and an external device.

16. The method of claim 15,
Wherein the metal case has an electric shock protection function that partially surrounds or entirely surrounds the side of the housing of the electronic device.

16. The method of claim 15,
Wherein the metal case is provided so as to surround a camera provided to be exposed to the outside on a front surface or a rear surface of the housing of the electronic device.