KR101978426B1 - Circuit protection device and mobile electronic device with the same - Google Patents

Abstract

An electric shock protector is provided. The electric shock protection housing according to an embodiment of the present invention includes a body having a volume of 0.7 to 1.0 mm and including a barium titanate-based component and a glassy component; And an internal electrode disposed in the inside of the body, wherein an electric shock protection function for protecting against a leakage current and static electricity flowing into the internal body, and a signal transfer function for suppressing attenuation of a data signal flowing into the internal body, do. According to this, even though the device is realized to be small and slim, it is possible to protect the user from the leakage current caused by the power source and protect the internal circuit from external static electricity. In addition, it has a sufficient electrostatic capacity to protect against static electricity of leakage current and high voltage, and is not easily broken by insulation and is excellent in durability. Furthermore, attenuation of the data reception signal in the communication frequency band can be minimized to ensure excellent data communication efficiency, and the device has excellent mechanical strength and excellent handling properties.

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 more particularly, to an electric shock protection device that does not easily breakdown due to external static electricity even though the size of a light and small slot, has excellent mechanical strength and is excellent in durability, And a portable electronic device having the same.

Recently, various kinds of mobile electronic devices such as MP3, mobile phone, and smart watch have been miniaturized due to the development of electronic device technology. These electronic devices have a very high room for contact with the human body as compared with the electronic devices used in a specific place, and therefore, there is a technology for protecting the human body and electronic devices from the voltage caused by leakage current, static electricity and other excessive pulses . Especially, recently, the adoption of metal case that gives a feeling of quality with the enhancement of mobile devices is increasing. 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.

In addition, such portable electronic devices typically use 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. However, when the Y-CAP provided for electrical insulation, such as a non-genuine charger, does not have the normal characteristics, the DC power may not be sufficiently blocked by the Y-CAP. Further, leakage current may be generated by the AC power source , This leakage current can propagate along the ground of the circuit. Since the leakage current can be transmitted to a conductor that can be contacted with a human body as well as an external case of a portable electronic device, the result is uncomfortable to the user, and in severe cases, the user can suffer a fatal injury due to an electric shock.

Recently, a protection device for preventing a high voltage static electricity or a leakage current has been developed. However, when the device is implemented in a small and slim manner in accordance with a portable device of a light and small size, there is a problem that the insulation is easily broken by a static electricity generated at a momentarily high voltage . Further, as the protection device is implemented more compactly and slimly, there is little room for structural change in the inside of the protection device so as to have sufficient capacitance to protect the static electricity of the leakage current and the high voltage. Even if the design is changed finely, the refined internal structure is more easily broken by the static electricity of the leakage current and the high voltage, and there is a problem that only one-time protection is possible. In addition, the capacitance of the protection device decreases as the size of the protection device becomes smaller and slimmer. When the protection device is electrically connected to a communication-related component such as an antenna through a circuit, the data reception signal in the communication frequency range is attenuated to significantly decrease the communication efficiency. There is a problem in the use of the same circuit is not suitable.

Accordingly, despite the fact that it is implemented in a small and slim manner, it has a sufficient electrostatic capacity to protect the static electricity of the leakage current and the high voltage and at the same time, it does not easily break the insulation and the durability is excellent. It is urgent to develop an electric shock protection device having a limited range of possible areas.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable electronic device capable of protecting a user from leakage current caused by a power source and protecting an internal circuit from external static electricity, And an object of the present invention is to provide an electric shock protection device having sufficient physical properties.

The present invention also provides an electric shock protection device which has a capacitance sufficient to protect against static electricity of a leakage current and a high voltage and which can easily prevent leakage current interruption and high voltage static electricity without being easily broken by insulation There is a purpose.

Another object of the present invention is to provide an electric shock protection device capable of ensuring excellent data communication efficiency by minimizing attenuation of a data reception signal in a communication frequency band even if the protection device is used in an antenna and a circuit electrically connected thereto.

Further, the present invention has another object to provide an electric shock protection device having an excellent mechanical strength and improved handling properties of a protection element.

It is another object of the present invention to provide a portable electronic device in which a user and an internal circuit are protected from static electricity and leakage current even if the external housing is a conductive material through the electric shock protection device according to the present invention.

In order to solve the above-described problems, the present invention provides a honeycomb structure comprising a body having a volume of 0.7 to 1.0 mm, comprising a barium titanate-based component and a glassy component; And an internal electrode disposed in the inside of the element body, wherein the internal electrode includes: an electric shock protection function for protecting against a leakage current and static electricity flowing into the electric element, and a signal transmission function for suppressing attenuation of a data signal flowing into the electric element, Thereby providing a protection device.

According to an embodiment of the present invention, the electric shock protection device includes an electric shock protection unit electrically connected in parallel to protect against a leakage current and static electricity flowing into the electric shock protection device, and a signal transmission device for suppressing the attenuation of the data signal Section.

In addition, the internal electrode included in the electric shock protection element may include at least a pair of first internal electrodes, and the first internal electrodes may be disposed horizontally or vertically. At this time, the gap between the pair of first internal electrodes may further include a gap or a discharge material filling part or all of the gap. In addition, the volume of the gap may be 1 to 15% of the total volume of the electric shock protection device.

Also, the internal electrode included in the electric shock protection element may include at least a pair of second internal electrodes, and the second internal electrodes may be arranged so that at least a part of each electrode surface overlaps in the vertical direction.

The shielding portion may include a first internal electrode, the signal transmission portion may include a second internal electrode, and a vertical distance between the first internal electrode and the second internal electrode disposed adjacent to each other may be 20 to 100 mu m .

In addition, the dielectric body may have a dielectric constant of 180 to 680 so as to prevent attenuation of an incoming data signal, static electricity passing through without dielectric breakdown, and leakage current of an external power source.

The calcined body may contain 10 to 30 parts by weight of barium titanate based on 100 parts by weight of the glassy component.

In addition, the body may have a density of 4.5 to 5.8 g / cm3.

Also, with respect to the thickness direction of the internal electrode, the body may have a thickness of 0.5 to 1.0 mm.

The body may be formed by laminating and sintering a plurality of sheets including a barium titanate-based component and a glassy component. The sheet having the internal electrodes on one surface thereof may have a minimum thickness of 20 占 퐉 or more, More preferably 20 to 70 mu m.

In addition, the vitreous component may comprise aluminum oxide and silicon oxide. At this time, the glassy component may have a dielectric constant of 25 or more.

In addition, the electrostatic protection device may have a capacitance of 4 to 100 volts.

The electric shock protection device may further include an external electrode formed on an outer surface of the body so as to be electrically connected to the internal electrode.

The present invention also relates to a human body contactable conductor; And an electric shock protection element disposed between the electric conductor and the circuit part according to the present invention.

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.

Hereinafter, terms used in the present invention will be described.

As used herein, the terms " vertical direction " and " horizontal direction " are relative positions relative to the thickness direction of the electrodes provided inside the body, Horizontal direction " is perpendicular to the thickness direction of the electrode. In this case, the parallel and vertical directions are used to cover both the parallel and perpendicular viewing visually in consideration of the thickness direction of the electrode.

The term " first elementary body " and " second elementary body " used in the present invention refer to respective functional parts, for example, an electric shock protection part having an electric shock protection function and a signal transmission part The section of the body is divided into the first and second bodies after the division in consideration of the arrangement of the internal electrodes. However, as can be seen from FIG. 7, it can be seen that the first and second bodies are not separated from each other on the cross section of the manufactured electric shock protection element, but exist as a single body. However, considering the one manufacturing process of the body, the body can be formed by sintering after stacking a plurality of sheets having one internal electrode on one sheet, It will be apparent to those skilled in the art that the thickness and number of sheets constituting the sheet can be indirectly deduced.

According to the present invention, it is possible to protect the user from the leakage current caused by the power source and protect the internal circuit from external static electricity even though the electric shock protection device is realized to be small and slim according to the development trend of portable devices of light and small size. In addition, it has a sufficient capacitance to protect against the leakage current and high voltage static electricity, and can easily prevent leakage current interruption and high voltage static electricity because it is not easily broken by insulation. Furthermore, even when used in a communication-related circuit, attenuation of a data reception signal of a communication frequency band can be minimized, thereby ensuring excellent data communication efficiency and thus being free from restriction of an application circuit of a protection device. In addition, since the mechanical strength of the device is excellent and the handling property is improved, productivity in manufacturing electronic devices can be improved. Accordingly, even if the outer housing of the electronic device is a conductive material, the user and the internal circuit are protected from the static electricity and leakage current through the electric shock protection device according to the present invention. Therefore, the device can be freely selected as an external housing material, Can be applied.

FIG. 1 is a perspective view of an electric shock protection device according to an embodiment of the present invention. FIG. 1 (a) is a perspective view showing an inner and an outer electrode arrangement of an electric shock protection device, Cross-section,
2 is a sectional view of an electric shock protection unit included in an electric shock protection device according to an embodiment of the present invention,
FIG. 3 is a view of an electric shock protection device according to an embodiment of the present invention. FIG. 3 (a) is a perspective view showing the internal and external electrode arrangement of the electric shock protection device,
4 is a cross-sectional view of an electric shock protection device according to an embodiment of the present invention,
5A to 5E are conceptual diagrams showing an application example of an electric shock protection device according to an embodiment of the present invention,
6A to 6C are schematic equivalent 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 an embodiment of the present invention, and
7 is a sectional SEM photograph 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.

First, the function of the electric shock protection device according to an embodiment of the present invention will be described.

The electric shock protection device performs an electric shock protection function for protecting against a leakage current and static electricity flowing into the electric shock protection device and a signal transfer function for suppressing attenuation of the data signal flowing into the electric shock protection device through one element. In consideration of such a complex function, preferably, the electric shock protection device may be disposed between a conductor such as an antenna and a built-in circuit part.

Further, the above-described electric shock protection function and signal transmission function can be achieved through an electric shock protection element such as that shown in Fig. 1A or an electric shock protection element such as that shown in Fig. 3A.

The electric shock protection device 100 shown in FIG. 1A includes an electric shock protection unit electrically connected in parallel to protect against a leakage current and static electricity flowing into the electric shock protection device, And a signal transmission unit. Specifically, as shown in FIGS. 1B and 1C, the electric shock protection device 100 may include an electric shock protection unit 110 and signal transmission units 120a and 120b disposed above and below the electric shock protection unit 110 . However, the present invention is not limited thereto, and the signal transmission unit may be disposed at either one of the upper and lower portions of the electric shock protection unit. If the signal transmission unit and the electric shock protection unit are electrically connected, for example, electrically connected in parallel, And the signal transmission portion may be disposed on the side of the portion.

First, the electric shock protection unit 110 may include first internal electrodes 111a and 112a spaced apart in a horizontal direction or a vertical direction, and first main bodies 111, 112 and 113 surrounding the first internal electrodes 111a and 112a. The first internal electrodes 111a and 112a may further include a gap or a discharge material filling a part or all of the gap. For example, It can be a presser.

The positional relationship between the pair of first internal electrodes 111a and 112a provided in the electric shock protection unit 110 and the gap 116 will be described with reference to FIGS. 1B and 2. As shown in FIG. 1B, The electrodes 111a and 112a are arranged such that at least a part of each electrode face is overlapped in the vertical direction in the end face of the electric shock protection element and the air gap forming member 115 including the air gap 116 in the overlapped spacing space is disposed . Alternatively, as shown in FIG. 2, the electric shock protection unit 110 'of the electric shock protection element includes a pair of first internal electrodes 111a' and 112a 'spaced apart in the horizontal direction and first and second internal electrodes 111a' and 112a ' ', And the gap may be formed to have a height greater than the thickness of the first internal electrodes 111a' and 112a ', and the discharge material 117 May be provided.

The number / arrangement of the first internal electrodes 111a, 111a ', 112a and 112a' and the structure / arrangement of the voids are not limited to those shown in FIGS. 1B and 2, Two or more pores may also be provided. 1B, the void forming member 115 may remain in the sintered body after sintering, or may be vaporized at a temperature not higher than the sintering temperature of the sintered body so that only voids remain in the final sintered body and the void forming member may be lost .

In addition, the discharge material 117 may be filled only in a part of the air gap, unlike in FIG. In this case, the discharge material may include a case where the discharge material is filled only in a part of the air gap by coating the inner surface of the body surrounding the air gap, and the present invention is not particularly limited to the specific shape in which the discharge material fills the air gap Do not. However, it is preferable that a part of the first internal electrode is filled so that the discharge material is directly connected to each of the separated first internal electrodes. The discharge material 117 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 electrodes 111a, 111a ', 112a, and 112a' include an Ag component, the discharge material may include SiC-ZnO-based components. The SiC (Silicon Carbide) component is excellent in thermal stability, excellent in stability in an oxidizing atmosphere, has constant conductivity and heat conductivity, and has a low dielectric constant. Further, the ZnO component has excellent nonlinear resistance characteristics and discharge characteristics. At this time, the SiC and ZnO have conductivity when used separately, but when they are mixed and fired, ZnO is bonded to the surface of the SiC particles to form an insulating layer. This insulating layer is because the SiC completely reacted to form the SiC-ZnO reaction layer on the surface of the SiC particles. Accordingly, the insulating layer has an advantage that the Ag path is blocked to provide a further higher insulation property to the discharge material, and the resistance against static electricity is improved, thereby more advantageously eliminating the DC shorting phenomenon of the electric shock protection unit 110 . Although the present invention has been described with reference to a SiC-ZnO-based material as an example of the discharge material, the present invention is not limited thereto. The discharge material may be a material constituting the first internal electrodes 111a, 111a ', 112a and 112a' A non-conductive material including a semiconductor material or metal particles may be used

The interval between the first internal electrodes 111a, 111a ', 112a and 112a' and the overlapping area or length of the first internal electrodes 111a, 111a ', 112a and 112a' are set to be equal to the breakdown voltage (or trigger voltage) Vbr of the electric shock protection parts 110 and 110 ' And the interval between the pair of first internal electrodes 111a / 112a and 111a '/ 112a' may be 10 to 100 占 퐉. For example, the interval between the first internal electrodes 111a and 112a may be 25 占 퐉. Here, if the interval between the pair of first internal electrodes 111a / 112a and 111a '/ 112a' is less than 10 mu m, resistance to static electricity may be weakened. If the interval between the pair of first internal electrodes 111a / 112a and 111a '/ 112a' exceeds 100 mu m, the discharge starting voltage (operating voltage) increases and smooth discharge due to static electricity is not achieved. May be lost.

The thickness of the first internal electrodes 111a, 111a ', 112a, and 112a' may be 2 to 10 占 퐉. If the thickness of the first internal electrodes 111a, 111a ', 112a, 112a' is less than 2 占 퐉, it may be difficult to serve as an internal electrode. If the thickness of the first internal electrodes 111a, 111a ', 112a, 112a' exceeds 10 m, the distance between the internal electrodes is limited, and the volume of the electric shock protection device 100 increases, I can go crazy.

The length of the first internal electrodes 111a, 111a ', 112a and 112a' may be 70 to 85% of the length of the long side when the cross section of the body is rectangular, and the width may be 50 to 65% Lt; / RTI > For example, the length of the first inner electrode may be 0.048 inches in length and 0.018 inches in width in a 0.06 inch long, 0.03 inch long electrically conductive protection element.

The first internal electrodes 111a, 111a ', 112a and 112a' may include any one or more of Ag, Au, Pt, Pd, Ni and Cu, and may be Ag / Pd .

On the other hand, according to this configuration and arrangement, for example, the discharge start voltage (operation voltage) due to static electricity of the electric shock protection parts 110 and 110 'may be 1 to 15 kV. Here, if the discharge starting voltage of the electric shock protection part 110 or 110 'is 1 kV or less, it is difficult to secure the resistance against static electricity, and if it is 15 kV or more, it may be damaged by static electricity.

In order to allow leakage current interruption and high-voltage static electricity to pass therethrough, the breakdown voltage Vbr of the electric shock protection unit is greater than the rated voltage Vin of the external electric power source for driving the electronic device having the breakdown voltage Vbr of the electric shock protection unit 110 and 110 ' It can be big. At this time, the rated voltage may be any one of 240V, 110V, 220V, 120V, 110V, and 100V.

The first elementary body 111, the second elementary body 110 and the second elementary body 113 are directly contacted with the first internal electrodes 111a and 112a in the end surface of the electric shock protection unit 110. The first elementary body 110 includes a plurality of sheet layers 111, 112, And the first internal electrodes 111a and 112a provided on the respective surfaces of the first internal electrodes 111a and 112a are arranged to face each other and then integrally formed by sintering after sintering. Alternatively, the first inner electrode 111a and the first inner electrode 112a may be spaced apart from each other so as to have the electrode structure of the electric shock protection unit 110, and then the first inner electrode may be formed by sintering.

The first elementary bodies 111, 112 and 113 of the electric shock protection unit can be sintered integrally with the second elementary bodies 121, 122, 123, 124, 125, 126, 127 and 128 of the signal transmission units 120a and 120b, It is not. The description of the first elementary bodies 111, 112, and 113 will be described concretely with the second elementary body after the explanation of the signal transmission unit described later.

The signal transmission units 120a and 120b may pass the communication signal without passing through the communication band from the conductor such as the antenna and may not cause the RF signal failure.

The signal transmission units 120a and 120b pass the static electricity without being destroyed by insulation when the static electricity flows from the conductor, and can cut off the leakage current, especially the DC component, of the external power input from the ground of the circuit unit, Function can be performed at the same time as the above-described electric shock protection element, whereby a more excellent electric shock protection function can be realized. It is preferable that the insulation breakdown voltage Vcp of the signal transfer parts 120a and 120b is larger than the rated voltage Vbr of the external power supply of the electronic device in order for the signal transfer parts 120a and 120b to simultaneously perform the electric shock protection function have. At this time. The breakdown voltage Vcp of the signal transfer parts 120a and 120b is formed at both ends of the second internal electrodes 121a, 122a, 123a, 124a, 125a, 126a, 127a and 128a.

The second internal electrode may be formed in various shapes and patterns, and one or more of the plurality of second internal electrodes may be provided in the same pattern or may have different patterns. That is, when the second internal electrode is disposed inside the body so as to realize a desired capacitance, there is no limitation on the pattern of each second internal electrode.

The second internal electrodes 121a, 122a, 123a, 124a, 125a, 126a, 127a, and 128a constituting the signal transmission units 120a and 120b are disposed between a pair of second internal electrodes facing each other, The gap between the adjacent adjacent electrodes 121a and 122a among the second internal electrodes 121a, 122a, 123a and 124a provided in the first signal transmission unit 120a is in the range of 15 to 100 μm And preferably 20 to 100 mu m. If the interval between the adjacent second internal electrodes is less than 15 mu m, it is difficult to secure a capacitance sufficient to pass the communication signal of the radio communication band without attenuation. If the interval between the adjacent second internal electrodes exceeds 100 mu m, there is a problem that it is difficult to realize a capacitance of a high capacity.

At this time, the thickness of each of the second internal electrodes constituting the signal transmission units 120a and 120b is set to be 1/10 to 1/2 of the interval between the pair of second internal electrodes facing each other . For example, when the interval between the pair of second inner electrodes 121a / 122a facing each other is 20 占 퐉, the thickness of the second inner electrodes 121a and 122a is set to be in the range of 2 占 퐉 to 10 占 퐉 . If the thickness of the second internal electrode is 2 mu m or less, the second internal electrode can not function as an electrode. If the thickness of the second internal electrode exceeds 10 mu m, the thickness of the second internal electrode becomes thick. The number of unit units that can be provided in the second elementary body of the limited area is limited when a pair of the upper and lower second internal electrodes are used as a unit unit, There is a difficult problem.

1c, the external electrodes 132 adjacent to the free ends of the second internal electrodes 124a may be arranged at the shortest distance between the free ends of the both ends of the second internal electrodes, which are not connected to the external electrodes, May be provided so as to have a distance of at least 15 mu m and a distance of 15 mu m to 100 mu m.

The second internal electrode constituting the signal transmission units 120a and 120b may be formed by forming one internal electrode 121a in one sheet layer 121 as shown in FIG. And a plurality of second internal electrodes (not shown) arranged in a line in a sheet layer (not shown) so as to be spaced apart from each other, and a plurality of sheet layers including a plurality of second internal electrodes on one surface, A plurality of second internal electrodes formed on the first internal electrodes may be arranged to face each other with an overlapping area of a predetermined area or more. For example, the number of the second internal electrodes formed on one sheet layer may be two, the spacing distance may be 50 탆, and one of the two second internal electrodes may have a length of 120 탆 and a width of 360 탆 And the other one may have a length of 1010 mu m and a width of 360 mu m and a total of twelve such single sheet layers may be stacked such that a short length of the two second internal electrodes included in one sheet layer The overlapping areas of the second internal electrodes of the long length included in the two sheet layers which are stacked adjacent to each other are set so as to be larger than the width of the second internal electrodes of the second internal electrodes included in the adjacent sheet layers, 360 × length 840 μm, and a sintered signal transmission unit can be realized.

The second internal electrode may be the same as or different from the material of the first internal electrode.

Meanwhile, the interval between the electric shock protection unit 110 and the signal transmission units 120a and 120b may be larger than the interval between the pair of first internal electrodes 111a and 112a. That is, it is preferable to ensure a sufficient distance from the first internal electrodes 111a and 112a so that static electricity or leakage current flowing along the pair of first internal electrodes 111a and 112a does not leak to the adjacent second internal electrodes .

Meanwhile, the interval between the electric shock protection unit 110 and the signal transmission units 120a and 120b may be larger than the interval between the pair of first internal electrodes 111a and 112a. That is, it is preferable to ensure a sufficient distance from the first internal electrodes 111a and 112a so that static electricity or leakage current flowing along the pair of first internal electrodes 111a and 112a does not leak to the adjacent second internal electrodes . At this time, it is preferable that the distance between the signal transmission parts 120a and 120b and the electric shock protection part 110 is two times or more larger than the interval between the pair of first internal electrodes 111a and 112a. For example, when the interval between the pair of first internal electrodes 111a and 112a is 10 占 퐉, the distance between the signal transmission parts 120a and 120b and the electric shock protection part 110 may be 20 占 퐉 or more have.

1C, the distance between the signal transmission unit and the electric shock protection unit is set such that the position of the signal transmission unit 120a is the closest to the electric shock protection unit 110 among the plurality of second internal electrodes included in the signal transmission unit 120a And the first internal electrode 111a closest to the second internal electrode 121a among the first internal electrodes provided in the second internal electrode 121a and the electric shock protection unit 110, respectively.

 However, when the ESD protection unit 110 and the signal transmission units 120a and 120b are disposed in close proximity to each other, the ESD flows from the ESD protection unit 110 to the signal transmission units 120a and 120b, And may cause dielectric breakdown of the signal dropping portions 120a and 120b. Accordingly, the distance between the signal transmission parts 120a and 120b and the electric shock protection part 110 is set to be at least 20 mu m, more preferably 30 mu m or more, and even more preferably 40 to 100 mu m Range. ≪ / RTI > If the gap between the first internal electrode and the second internal electrode disposed adjacent to each other is less than 20 占 퐉, instantaneous high-voltage static electricity may flow into the signal transfer part and breakdown due to insulation. Especially, when it is used in a circuit in which frequent static electricity passes, There is a problem that the negative dielectric breakdown can be further increased.

A plurality of sheet layers 121, 122, 123, 124, 125, 126, 127 and 128 having second internal electrodes 121a, 122a, 123a, 124a, 125a, 126a, 127a and 128a are sequentially stacked on the signal transmission units 120a and 120b , A plurality of electrodes provided on one surface of each of the electrodes may be arranged to face each other, and then a second body may be formed through a sintering or curing process. Alternatively, the second inner electrode may be disposed so as to have the electrode structure of the signal transmission units 120a and 120b in one sheet, and then the second inner electrode may be formed through a sintering or curing process.

Hereinafter, the element body including the first elementary bodies 111, 112, 113 and the second elementary bodies 121, 122, 123, 124, 125, 126, 127, 128 will be described.

In order for an electric shock protection device to be provided in a portable electronic device of a lightweight and compact size, it is required to downsize the electric shock protection device itself. However, the capacitance of the electric shock protection element depends on the volume of the body. In other words, if the size of the internal electrode and the size of the internal electrode are all reduced, the electric shock protection device can be realized. This is because, even if the thickness (height) of the electric shock protection device is reduced and the distance between the internal electrodes is narrowed and the electrostatic capacity that can be increased is considered, the area of the electrode or the area where the electrode can be formed simultaneously decreases. As a result, there is an absolute structural limitation that can not be solved by design changes of the electrode structure to maintain the electrostatic protection device before the miniaturization even after miniaturization. The decrease in thickness (height) due to the miniaturization of the electric shock protection element is caused by a decrease in the volume of the air gap provided inside the body, a vertical distance between the first internal electrodes of the electric shock protection portion and a vertical distance between the second internal electrodes As the distance decreases, the breakdown voltage (Vbr) of the electric shock protection part and the breakdown voltage (Vcp) of the signal transfer part can not be realized enough to withstand or pass instantaneous high voltage static electricity flowing from the outside, And the ability to protect the circuit from further leakage current interruption / static electricity may itself be permanently lost.

As shown in FIG. 1B, the body can be realized by stacking and sintering a plurality of sheets having internal electrodes on one side. In this case, the shorter distance between the internal electrodes in the up and down direction means that the thickness of the sheet is reduced. However, the sheet having a reduced thickness has a problem that the mechanical strength of the body is lowered due to the high possibility that cracks, porosity and the like may be contained, and it is difficult to bear or pass when a high-voltage static electricity is introduced. In addition, the lowered capacitance has a problem of significantly attenuating the reception sensitivity of a communication signal input to the electric shock protection element, for example, a mobile radio communication frequency band.

When the thickness of the sheet on which the internal electrode is formed is not changed, the number of sheets and the number of the internal electrodes which can be stacked inside the body are decreased simultaneously, Even if the defects due to the air gap are prevented, the electrostatic capacity of the electric shock protection device is lowered as a result. Even in this case, the static electricity and the leakage current flowing from the outside can not be blocked. At the same time, none. Considering the problem of miniaturization of such an electric shock protection element, it may not be very desirable to combine the signal transmission portion and the electric shock protection portion in a single body having a limited volume.

However, even when the absolute size of the electric shock protection device is reduced, when the body is formed of the barium titanate component and the glassy component, the electric shock protection function and the communication signal transfer function can be performed at the same time.

Accordingly, the body of the electric shock protection device according to the present invention can be easily installed inside a portable device of a light-weight and small-sized portable terminal, while blocking leakage current, allowing instantaneous high-voltage static electricity exceeding 8 kV to pass therethrough, A barium titanate-based component and a glassy component, so that the communication signal can be transmitted without any attenuation.

If the volume of the bodies (111, 112, 113, 121, 122, 123, 124, 125, 126, 127, 128) is less than 0.7 경우, the area within the body where the electrodes can be printed is reduced to realize a capacitance of more than a certain level, There is a problem that the design change may be difficult, and the number of the internal electrodes and the volume of the pores can be reduced, so that dielectric breakdown of the element body can easily occur. In addition, if the volume of the body is more than 1 ㎣, it may be difficult to apply to a portable device of a light and small size. Further, there is a difficulty in changing the entire PCB design for mounting the electric shock protection device when the electric shock protection device is mounted on a substrate, and the pick-up error (pick up error may occur in the manufacturing process of a product using an electric shock protection device. Accordingly, the electric shield may be, for example, a standardized device having a width of 0.06 inches, a height of 0.03 inches, and a height of 0.03 inches.

In addition, the above-described element is embodied to include a barium titanate-based component and a glassy component.

The barium titanate-based component may be a barium metatitanate, which may have a molar ratio of Ba and Ti of 0.8 to 1.0.

The vitreous component may include oxides of at least one metal selected from the group consisting of Al, B, Si, Ca and Mg, and non-metal oxides, preferably oxides of Al and Si, Is not less than 25, and more preferably not less than 35. This increases the density of the body to further secure the mechanical strength of the body, and the defect of the body can be reduced, thereby reducing the risk of dielectric breakdown.

In addition, in order to remarkably exhibit the desired physical properties, the vesicles 111, 112, 113, 121, 122, 123, 124, 125, 126, 127, and 128 according to an embodiment of the present invention may contain 10 to 30 parts by weight of barium titanate based on 100 parts by weight of the glassy material. More preferably, the barium titanate component may be contained in an amount of 15 to 25 parts by weight. If the barium titanate-based component is used in an amount of less than 10 parts by weight based on 100 parts by weight of the glassy component, it is not sufficient to compensate for the decreased capacitance due to miniaturization, so that the electric shock protection function and the attenuation suppression function of the communication signal can be smoothly performed There is a problem that such a function can be lost due to the absence or insulation breakdown. When the barium titanate-based component is contained in an amount of more than 30 parts by weight, the compensation of the electrostatic capacity, which is reduced as the body is reduced in size, may be sufficient, but the density of the body may be significantly lowered and the mechanical strength may be lowered. Therefore, there is a problem that the dielectric breakdown of the body due to the pores may be included in the body. Also, as the sintering temperature of the sintered body increases, it may be difficult to use a metal such as Ag as an internal electrode having a relatively low sintering temperature and good conductivity as an internal electrode.

In addition, the thus-obtained element can have a dielectric constant of 180 to 680 and a density of 4.5 to 5.8 g /.. The high permittivity of the body is suitable for a device of a miniaturized size to pass instantaneous high-voltage static electricity or cut off the leakage current, and it is suitable for the communication signal, especially the mobile radio communication frequency band (700MHz to 2.6GHz) It may be more suitable for passing without attenuation. If the dielectric constant of the body is less than 180, taking into consideration the limited volume of the body, which is realized in the range of 0.7 to 1.0 를, it may be difficult to simultaneously develop the desired electric shock protection function and communication signal attenuation suppression function. There is a problem that functions may be permanently lost. In addition, if the dielectric constant exceeds 680, the internal electrode should be designed such that the overlapping electrode area of the internal electrodes (the first internal electrode and / or the second internal electrode) spaced up / down relative to the volume is reduced Such a design of the internal electrode may reduce the corresponding area of the insulator having the insulating characteristic when the high voltage static electricity is instantaneously introduced, so that there is a possibility that the electric field is concentrated at a specific site, thereby increasing the possibility of dielectric breakdown.

In addition, when the density of the body is less than 4.5 g / 기계, the mechanical strength of the body is very weak, the body may contain pores, and the pores may cause cracking of the body, There is a problem that it can induce. If the density of the body is higher than 5.8 g / 장, the sintered body must be sintered at a temperature higher than the sintering temperature for a long time, which may cause problems such as damage to the internal electrode and restriction of material selection of the internal electrode. In particular, in order to compensate for the decrease in density due to the increase in the content of the barium titanate-based component in the body, the problem of damage to the internal electrode can be further exacerbated as the sintering temperature is increased and / or the sintering time is extended.

1B, a plurality of sheets including a barium titanate-based component and a glassy component may be laminated and sintered, and the inner electrodes may be formed of any one of the plurality of sheets, The sheet formed on one surface may have a minimum thickness of 20 mu m or more. As described above, when a very thin sheet is provided, cracks can be easily generated in the process of stacking the sheets. If the sheet includes defects such as pores, the defects in the sheet having a small thickness can be prevented It is preferable that the sheet having the internal electrode formed on one side thereof has a minimum thickness of 20 mu m or more. On the other hand, considering that the volume of the body is 0.7 to 1.0 mm, increasing the thickness of the sheet beyond a certain level due to the limited number of sheets that can be stacked at a limited thickness of the corpuscle is rather an effect of protecting the electric shock protection and / It may result in degradation of the signal attenuation suppression function. Accordingly, it is preferable that the thickness of one sheet having the internal electrode on one surface is 20 to 70 탆.

 Also, considering the volume and the active area of the internal electrode, the thickness of the body is preferably 0.5 to 1 mm, more preferably 0.5 to 0.8 mm, and still more preferably 0.5 to 0.6 mm Accordingly, it is preferable that the sheet provided on at least one surface of the internal electrode is laminated to 2 to 40 sheets in consideration of the capacitance to be realized, and the sintered body is formed as a single body. If the thickness exceeds 1 mm in consideration of the limited volume, the area in which the internal electrode can be formed is reduced, so that the desired level of capacitance implementation, electric shock protection function, and data signal attenuation suppression function can not be simultaneously achieved have. In addition, when the considered thickness is less than 0.5 mm, the area in which the internal electrode can be formed increases and the interval between the internal electrodes is reduced, which is suitable for realizing the fixed capacitance. However, the thickness of the thinned sheet is increased by high- There is a problem that the function of the electric shock protection device can not be continuously expressed.

According to an embodiment of the present invention, an electric shock protection device can be implemented as shown in FIGS. 3A and 3B. 3A and 3B includes at least one pair of internal electrodes 211a and 212a provided inside the bodies 211 and 212 and 213 and the internal electrodes 211a and 212a provided inside the bodies 211 and 212 and 213, And external electrodes 133 and 134 formed on outer surfaces of the bodies 211, 212 and 213 so as to be electrically connected to the electrodes 212a and 212a. At this time, the internal electrodes 211a and 212a may be arranged such that predetermined electrode areas overlap with each other in the upward and downward directions. Further, it is possible to further include a gap or a discharge material filling at least a part of the gap in the spaces separated by the pair of the internal electrodes 211a and 212a. At this time, the electrode area where the overlapping internal electrodes are overlapped, the number of internal electrodes provided, the distance between them, the number of voids, and the like are appropriately selected to have a breakdown voltage (Vbr) larger than the rated voltage of the external power source . As shown in FIG. 4, the electric shock protection element 200 'may include three pairs of internal electrodes 214a / 215a, 216a / 217a, and 218a / 219a, And may have a breakdown voltage greater than the rated voltage of the external power source by changing the overlapping area, spacing distance, and the volume of the gap between the electrodes.

However, as described above, it is not easy to realize a breakdown voltage (Vbr) larger than the rated voltage of the external power source in a limited 0.7 to 1.0 V volume of the body, or it is difficult to suppress the attenuation of the incoming data signal even if a sufficient breakdown voltage is implemented The body 211, 212, and 213 may include a barium titanate-based component and a glassy component, shielding an incoming leakage current, and protecting the internal circuit from instantaneous high-voltage static electricity. An attenuation suppression function capable of remarkably preventing attenuation of a data signal to be passed can be simultaneously exhibited.

On the other hand, the respective components of the bodies 211, 212, and 213 and the contents thereof, the dielectric constant and density of the body, the minimum thickness of the sheet, and the number of sheets are not described here.

As described above, the electrostatic discharge protection device according to an embodiment of the present invention may have a capacitance of 4 to 100 pF, and thus the present invention can simultaneously exhibit a desired electric shock protection function and an attenuation suppression function of a passing communication signal And can exhibit more excellent performance at the same time.

5A, in the portable electronic device 10, the electric shock protection device 100, 100 ', 200, 200' may be disposed between the conductor 12 and the circuit portion 14, such as an external metal case .

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. 5A, each of the conductors 12a, 12b, 12c, and 12d 100 ', 200, 200', 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 devices 100 and 100 ', 200, 200') 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 devices 100, 100 ', 200, 200' are connected to the metal case 12b to shield the leakage current and protect the internal circuit from static electricity .

Meanwhile, as shown in FIG. 5B, the electric shock protection elements 100, 100 ', 200, 200' may be disposed between the metal case 12 'and the circuit board 14'. At this time, since the electric shock protection elements 100, 100 ', 200, 200' are for passing static electricity without damage, the circuit board 14 'may have a separate protection element 16 for bypassing the static electricity to the ground have. Here, the protection element 16 may be a suppressor or a varistor.

5C, the electric shock protection elements 100, 100 ', 200, 200' are provided with matching circuits (for example, R and L components) between the metal case 12 'and the FFM As shown in FIG. 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.

5D, the electric shock protection devices 100, 100 ', 200, 200' 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.

As shown in FIG. 5E, the electric shock protection elements 100, 100 ', 200, 200' 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.

These electric shock protection devices 100, 100 ', 200 and 200' 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. 6A to 6C.

6A, when the leakage current of the external power source flows into the conductor 12 through the circuit board of the circuit portion 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 breakdown voltage Vbr of the electric shock protection elements 100, 100 ', 200, 200' is larger than the rated voltage of the external power source of the portable electronic device, It is possible to prevent the leakage current from being transmitted to the conductor 12.

At this time, since the signal transmission unit provided in the electric shock protection device 100, 100 ', 200, 200' can block the DC component included in the leakage current and the leakage current has a relatively lower frequency than the radio communication band, By acting as a large impedance, leakage current can be cut off.

As a result, the electric shock protection elements 100, 100 ', 200, 200' can shield the user from electric shock by blocking the leakage current from external power supplied from the ground of the circuit part 14.

Further, as shown in FIG. 6B, when static electricity flows from the outside through the conductor 12, the electric shock protection elements 100, 100 ', 200, 200' function as static electricity protection elements 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 static electricity can be passed through the instantaneous discharge. As a result, the electric resistance of the electric shock protection elements 100, 100 ', 200, 200', when the static electricity flows from the electric conductor 12, is lowered,

At this time, since the dielectric breakdown voltage Vcp of the signal transfer part provided in the electric shock protection elements 100, 100 ', 200, 200' is larger than the breakdown voltage Vbr of the electric shock protection parts 110, 110 ', 210, 120a, 120b, and can be passed only through the electric shock protection portions 110, 110 ', 210. [

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 elements 100, 100 ', 200, 200' can pass the static electricity without being broken by the static electricity flowing from the conductor 12, thereby protecting the inner circuit of the rear end.

6C, when a communication signal is inputted through the conductor 12, the electric shock protection elements 100, 100 ', 200 and 200' function to minimize the attenuation of the incoming communication signal or pass the attenuation without attenuation . That is, the electric shock protection devices 100, 100 ', 200, 200' are kept open in the electric shock protection parts 110, 110 ', 210 to shut off the electric conductor 12 and the circuit part 14, May pass the incoming communication signal. In this manner, the signal transfer units 120a and 120b of the electric shock protection device 100 can provide the inflow path of the communication signal.

The present invention will now be described more specifically with reference to the following examples. However, the following examples should not be construed as limiting the scope of the present invention, and should be construed to facilitate understanding of the present invention.

≪ Example 1 >

A sheet-forming composition was prepared to produce a plurality of molded sheets to form a body, specifically a barium metatitanate component (MLC-302M, sinocera) and a glassy component (L40, FERRO). 20 parts by weight of barium titanate was mixed with 100 parts by weight of the glassy component. Then, the mixture was ball milled with water as a solvent for 24 hours to prepare a mixture of glass powder having an average particle diameter of 0.2 to 0.4 占 퐉 and barium metatitanate powder having an average particle diameter of 0.4 to 0.8 占 퐉.

Thereafter, polyvinyl butyral type binder (manufacturer, trade name) was dissolved in a toluene / alcohol organic solvent so as to be mixed with 8 parts by weight with respect to 100 parts by weight of the raw material powder as a binder. The sheet forming composition was then milled and mixed with a small ball mill for about 24 hours.

The sheet-forming composition was prepared by a doctor blade method and dried at 25 DEG C for 24 hours to prepare a sheet having a thickness of 30 mu m. Thereafter, the produced sheet was cut to a width of 2.317 mm and a length of 1.158 mm to produce a plurality of sheets.

First, an internal electrode paste prepared in the following Preparation Example 1 was applied to one surface of a sheet formed product to prepare an electric shock protection portion, and then sintered so as to have a thickness of 3 탆, a length of 1.85 mm, and a width of 1.39 mm. At this time, the inner electrode paste was applied so as to form two internal electrodes on one surface of the sheet molding, and the shape of eleven characters in which the side portions were partially opposed to each other with respect to the longitudinal direction of each internal electrode, The distance between the ends of the body was 463 mu m, and the distance between the electrodes was 40 mu m.

Thereafter, a gap forming portion, which is a conventional resin composition, was vapor-deposited before the sintering temperature of the sheet was reached such that the volume of the voids became 5% of the volume of the sintered body after sintering in the space between the spaced apart internal electrodes. Thereafter, other sheet formings which had undergone no treatment were laminated on the sheet formings to which the internal electrode paste had been applied.

In addition, in order to prepare the signal transfer portion, 32 sheet formings each having the inner electrode paste of the following preparation example applied on one side thereof were prepared. Specifically, the internal electrode paste was applied to each of the sheet-form products so as to have a thickness of 3 탆, a length of 1.85 mm, and a width of 1.39 mm after sintering in the form of the internal electrode 121a of Fig. 1B.

Thereafter, 16 sheets of the sheet formings prepared for the signal transfer parts were laminated on the stacked sheet formings prepared for the electric shock protection part, respectively. At this time, after the sintering, the internal electrodes were stacked so that the electrode arrangement on the end face of the electric shock protection device was the same as that shown in Fig.

Thereafter, the sintered body was sintered at 900 ° C in an air atmosphere at normal pressure in a firing furnace to produce a sintered body having a volume of 0.810 m 2.

Then, the external electrode forming composition prepared in the following preparation example was applied to both ends where the internal electrodes protruded so as to be electrically connected in parallel between the internal electrodes protruding from both ends, and electrode firing was carried out at 700 DEG C for 120 minutes, An external protective layer, and an external electrode.

* Preparation Example

As the internal electrode paste and the external electrode paste, an 80 wt% Ag paste in which Ag powder was mixed with an ethyl cellulose binder resin and an organic solvent was prepared.

≪ Examples 2 to 6 >

The composition of the sheet molding was changed as shown in Table 1 below to prepare an electric shock protection device as shown in Table 1 below.

≪ Comparative Example 1 &

Except that the sintering temperature was changed to 750 ° C instead of 900 ° C after the sheet molding was laminated to fabricate an electric shock protection device as shown in Table 1 below.

<Experimental Example>

The following properties of the electric shock protection device produced in Examples and Comparative Examples were evaluated and are shown in Table 1 below.

1. Electrostatic protection performance

In order to evaluate ESD protection performance by external static electricity in portable electronic devices, ESD protection performance was evaluated by making an evaluation board similar to a mobile phone structure. At this time, assuming that the external metal case of the mobile phone is the source of ESD, ESD is applied while increasing the voltage to the conductive line made of copper, and the opposite side is assumed to be the PCB ground IC stage, and the waveform change is observed through the oscilloscope, And the peak voltage of the ESD which can be passed through at the maximum was measured.

2. Leakage current blocking performance

In order to evaluate the leakage current blocking capability, we assume that the leakage current can be increased to the maximum. To increase the capacity of the Y-CAP device in the transformer used to convert the AC power of the charger to DC, A charger was manufactured by arbitrarily changing the internal circuit so that a larger amount of leakage occurs from the power source to the DC circuit.

Also, an evaluation mobile phone having an outer housing of a metal material and an electric shock protection element was manufactured.

Then, the mobile phone was connected to the charger connected to the 220V outlet, the COM short probe of the digital multimeter was connected to the socket ground terminal, and the remaining probe was connected to the metal outer housing of the mobile phone to measure the leakage current.

3. Communication signal attenuation suppression performance

In order to evaluate whether or not an electric shock protector hinders RF reception sensitivity, a 3D mobile phone with an external housing is made of a metal material, and an evaluation mobile phone equipped with an electric shock protection device is inserted. Then, a frequency band We measured the TIP and TIS values by RF receiver to determine whether each frequency band meets a predetermined reference value while emitting an RF signal. At this time, the measurement angle of the DUT and the antenna was measured while varying from 0 to 360 degrees, and the result was evaluated as × when there was no abnormality in the data signal and ○ when the signal was attenuated.

4. Evaluation of the presence or absence of defects

SEM photographs were used to confirm whether pores or cracks were generated by cutting the cross section of the manufactured electric shock protection device. In the case of cracks or pores, the symbol X indicates that no defects were found.

As can be seen in Table 1,

In the case of Comparative Example 1 which was produced by laminating the same electrode structure and the same sheet molded product, as the density was outside of the volume range according to the present invention, due to the low density, the termination could not be performed due to the strength problem, It is also expected that the insulation will be destroyed even if it is used as an electric shock protection device.

In the case of Example 2, the leakage current evaluation was superior to that of Example 1 as the content of barium titanate deviated from the preferred range according to the present invention. However, the protection performance against ESD was reduced by 73% as compared with Example 1, It can be confirmed that the protection against ESD and the suppression of data signal reduction are not properly developed.

In addition, in the case of Example 5, as the content of barium titanate deviates from the preferred range according to the present invention, it can be confirmed that the result of leakage current evaluation is out of the allowable value (5)) It can also be seen that the performance is also reduced by 53.3% in comparison with the first embodiment, and it can be understood that the three functions can not be performed according to the attenuation of the data signal.

In addition, in the case of Examples 3 and 4, it can be confirmed that the barium titanate content is within the preferred range according to the present invention, and thus ESD protection, leakage current interruption, and data signal attenuation exhibit excellent performance.

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 part 100, 200, 200 ': Electric shock protection element
110, 110 ': electric shock protection unit 120a, 120b:
121, 122, 123, 124, 125, 126, 127, 128, 211,
The internal electrode 115 is formed on the inner surface of the cavity forming member 110. The internal electrode 115 is formed on the inner surface of the cavity forming member 111a,
116: air gap 117: discharge material
131, 132, 133, 134:

Claims (18)

A bulk having a volume of 0.7 to 1.0 mm and containing 10 to 30 parts by weight of barium titanate based on 100 parts by weight of the glassy component; And
And an inner electrode having a first inner electrode and a second inner electrode disposed inside the body,
Wherein at least one pair of the first internal electrodes are spaced horizontally or vertically to form an electric shock protection unit for protecting against a leakage current and static electricity flowing into the internal electrodes, Wherein at least a part of the electrode surface is overlapped to form a signal transferring portion for suppressing and passing the attenuation of the data signal flowing into the inside. delete delete The method according to claim 1,
Further comprising a gap between the pair of first internal electrodes spaced apart, or a discharge material filling the gap or a part or all of the gap. 5. The method of claim 4,
Wherein the volume of the gap is 1 to 15% of the total volume of the electric shock protection element. delete The method according to claim 1,
And the vertical distance between the first internal electrode and the second internal electrode disposed adjacent to each other is 20 to 100 占 퐉. The method according to claim 1,
Wherein the elementary body has a dielectric constant of 180 to 680 so as to block attenuation of an incoming data signal, pass static electricity passing through without dielectric breakdown, and leakage current of an incoming external power source. delete The method according to claim 1,
Wherein said elementary body has a density of 4.5 to 5.8 g / cm 3. The method according to claim 1,
Wherein the elementary body has a thickness of 0.5 to 1.0 mm. The method according to claim 1,
Wherein the elementary body is formed by laminating and sintering a plurality of sheets including a barium titanate-based component and a glassy component,
Wherein the sheet having the internal electrode on one surface thereof has a minimum thickness of 20 占 퐉 or more. The method according to claim 1,
Wherein the glassy component comprises aluminum oxide and silicon oxide. 14. The method of claim 13,
Wherein the glassy component has a dielectric constant of 25 or more. The method according to claim 1,
Wherein the electric shock protection device has an electrostatic capacity of 4 to 100.. The method according to claim 1,
Wherein the electric shock protection device further includes an external electrode formed on an outer surface of the element body so as to be electrically connected to the internal electrode. Human contactable conductors;
The circuitry and /
And an electric shock protection element according to any one of claims 1, 4, 5, 7, 8 and 10 to 12 arranged between the conductor and the circuit part Electronic device. 18. The method of claim 17,
Wherein the conductor comprises at least one of an antenna, a metal case, and a conductive ornament for communication between the electronic device and an external device.

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