WO2019031738A1 - Complex-type electric shock prevention device and portable electronic device having same - Google Patents

Abstract

A complex-type electric shock prevention device and a portable electronic device having the same are provided. The complex-type electric shock prevention device, according to one embodiment of the present invention, comprises: a varistor unit including a plurality of varistor material layers, at least two first inner electrodes provided in any one varistor material layer, and at least one second inner electrode provided in another one varistor material layer; a capacitor unit including a plurality of dielectric sheet layers, and a plurality of capacitor electrodes provided on the respective dielectric sheet layers; a blocking layer arranged between the varistor unit and the capacitor unit; and a pair of external terminals provided on both sides of the varistor unit and the capacitor unit so as to be connected to the plurality of capacitor electrodes, the first inner electrodes, or the second inner electrode, wherein the varistor unit, the capacitor unit, and the blocking layer are stacked in a green sheet state so as to be simultaneously sintered, and the blocking layer has ZrO3 as a main component thereof and can be an insulator containing ZnO for the contraction rate control of the capacitor unit and the varistor unit.

Description

Hybrid type electric shock prevention device and portable electronic device having the same

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric shock prevention device for an electronic device such as a smart phone, and more particularly to a hybrid electric shock prevention device capable of realizing a high electrostatic response characteristic and a high capacity, And more particularly, to a portable electronic device equipped with the same.

BACKGROUND ART [0002] In recent years, a metal housing used in a portable electronic device has excellent electrical conductivity due to the nature of its material, so that an electrical path can be formed between the external housing and the built-in circuit depending on the particular device or part.

Particularly, when a static electricity having a high voltage instantly flows through a conductor such as a metal housing having a large exposed surface area, the circuit part such as an IC or the like is damaged if a separate circuit protection element is not provided. In addition, if the leakage current generated by the AC power source is propagated to the metal housing along the ground portion of the circuit part, it may cause an electric shock which may cause injury to the user if the user gives an uncomfortable feeling or a severe case. have.

Moreover, in the case of static electricity, since it flows into the tip portion of a pointed shape rather than the flat surface due to its characteristics, there is a need for such a portion to have a protective device capable of further enhancing the immunity of static electricity.

On the other hand, since the portable electronic device essentially involves a communication function, it is required that the circuit protection device has a capacitance of a high capacity in order to stably process the communication signal without attenuation while the circuit protection device is provided. Particularly, Capacitances of various capacitances may be required depending on the position of the substrate.

In such a situation, heterogeneous bonding of a varistor element and a capacitor element has been proposed as a countermeasure for realizing various high capacity capacitances while enhancing the electrostatic resistance for each position where the leakage current is blocked in the portable electronic device and the position where the static electricity is easy to flow.

Korean Patent No. 10-1760887 discloses a method of reducing the difference in shrinkage ratio after simultaneous sintering by laminating sheets containing mutual substances in a part of a varistor and a capacitor and performing simultaneous sintering.

However, when the varistor contains a material forming a capacitor as in Korean Patent No. 10-1760887, the characteristics of the varistor are rapidly deteriorated. On the contrary, when a material forming a varistor is included in the capacitor, the insulation resistance of the capacitor is lowered, It is not suitable for use as a composite device capable of simultaneously passing communication signals and protecting static electricity.

Disclosure 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 semiconductor device and a manufacturing method thereof, which can prevent material transfer between dissimilar materials to prevent warping or peeling due to heterojunction, An object of the present invention is to provide a composite type electric shock prevention device capable of realizing a high capacity capacitance suitable for communication and a portable electronic device having the same.

According to an aspect of the present invention, there is provided a method of manufacturing a varistor including a plurality of varistor material layers, at least two first inner electrodes provided in one varistor material layer, and at least one second inner electrode provided in another varistor material layer, A varistor portion comprising; A capacitor portion including a plurality of dielectric sheet layers and a plurality of capacitor electrodes provided on the dielectric sheet layers; A barrier layer disposed between the varistor part and the capacitor part; And a pair of external terminals provided on both sides of the varistor part and the capacitor part and connected to the plurality of capacitor electrodes, the first internal electrode, or the second internal electrode . Here, the varistor portion, the capacitor portion, and the barrier layer are stacked and cofired in a green sheet state, and the barrier layer includes ZrO ₃ as a main component, and ZnO is contained for controlling the shrinkage ratio of the capacitor portion and the varistor portion. Lt; / RTI >

According to a preferred embodiment of the present invention, the barrier layer may block mass transfer between the varistor part and the capacitor part.

The insulator may contain 0.5 to 1.5 wt% of ZnO.

The barrier layer may further include a metal electrode.

At this time, the metal electrode may not be connected to the pair of external electrodes.

The metal electrode may include a first electrode connected to one of the pair of external electrodes; And a second electrode connected to the other of the pair of external electrodes and spaced apart from the first electrode by a predetermined distance.

At this time, the first electrode and the second electrode may be arranged vertically or on the same plane.

At this time, the insulator may include an air gap between the first electrode and the second electrode.

The varistor material layer may be formed of ZnO, Zr, Nb, Pr, Bi, Co. Si, Cr, and Mn, and the dielectric sheet layer contains at least one or more oxides of Ti, Si, Sr, Bi, W, and Nd as main components of BaTiO ₃ .

The capacitor electrode, the first internal electrode, and the second internal electrode may include at least one of Ag, Pd, Pt, Au, Ni, and Cu.

Further, the distance between the capacitor electrodes may be 20 占 퐉 or more.

According to another aspect of the present invention, there is provided a connector comprising: a conductor including a tip portion protruding outward from a conductive case; Circuitry; And a composite type anti-static device for electrically connecting the conductor and the circuit portion. Here, the electric shock protection device may be preferably an electric shock protection device of various embodiments having the above-described structure and characteristics.

According to a preferred embodiment of the present invention, the conductor includes a side key, or the leading end may include one end of a connector insertion port for connection with an external device.

According to the present invention, since the barrier layer including the insulator is provided between the varistor portion and the capacitor portion, the material movement between the varistor material layer and the dielectric is blocked during the co-firing process, thereby preventing the deterioration of the electrical characteristics due to the heterojunction So that the reliability of the product can be improved.

In addition, since the barrier layer is formed of a material having a high adhesion affinity between the varistor material layer and the dielectric material, adhesion stability between the varistor material layer and the dielectric material can be ensured, It is possible to reduce the difference in shrinkage ratio and to prevent distortion, peeling, cracking, or the like caused by the heterojunction.

In addition, by including a metal electrode in the barrier layer, the present invention can more effectively block the transfer of material between the varistor material layer and the dielectric, thereby improving the reliability and electrical characteristics of the product.

Further, since the electrostatic discharge structure is provided in parallel with the varistor portion, the electrostatic discharge characteristic of the varistor portion can be improved by further having the electrostatic discharge structure in the barrier layer.

1 is a cross-sectional view of a composite-type electric shock-preventing device according to a first embodiment of the present invention,

2 is a cross-sectional view of a composite-type electro-static discharge device according to a second embodiment of the present invention,

3 is a cross-sectional view of a composite-type electric shock-preventing device according to a third embodiment of the present invention,

4 is a cross-sectional view of a composite-type electric shock-preventing device according to a fourth embodiment of the present invention,

5 is a cross-sectional view of a composite-type electric shock-preventing device according to a fifth embodiment of the present invention,

6 is a cross-sectional view of a composite-type electric shock-preventing device according to a sixth 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.

1, the composite type anti-electrostatic device 100 according to the first embodiment of the present invention includes a varistor part 110, a capacitor part 120, a barrier layer 130, and an external terminal 140, .

The composite type anti-electrostatic device 100 is formed of a dissimilar material in which the varistor portion 110 and the capacitor portion 120 are different from each other. In the varistor portion 110, a high electrostatic response characteristic is realized. In the capacitor portion 120, Capacitors can be implemented to smoothly pass communication signals.

Here, the varistor portion 110 and the capacitor portion 120 are stacked on each other, and one of them may be stacked on the other. According to the present embodiment, it is preferable that the capacitor portion 120 is disposed on the soldered portion of the circuit board, and the varistor portion 110 is disposed on the capacitor portion 120 on the soldered portion. This is because the element constituting the capacitor section 120 is more reliable than the element constituting the varistor section 110 when the hybrid anti-electrostatic element 100 is mounted on the circuit board through soldering.

At this time, the hybrid anti-electric device 100 may include a barrier layer 130 between the varistor part 110 and the capacitor part 120. The barrier layer 130 is interposed between the varistor part 110 and the capacitor part 120 in a green sheet state and is formed by simultaneously firing the varistor part 110, the capacitor part 120 and the barrier layer 130, It is possible to realize the composite type electric shock protection device 100. [ If the varistor portion 110 and the capacitor portion 120 are fired simultaneously, the manufacturing process is simplified, and the productivity can be improved.

1, the hybrid anti-shock device 100 includes one varistor portion 110 and one capacitor portion 120. However, the present invention is not limited thereto, and the varistor portion 110 or the capacitor A plurality of units 120 may be provided. For example, although not shown, it is also possible to dispose the varistor part 110 at the center and the capacitor part 120 at the upper side and the lower side, respectively, with the barrier layer 130 interposed therebetween.

The varistor portion 110 includes a varistor material layer 110a, first internal electrodes 112, 114 and 118, and a second internal electrode 116, and has a luminescence current blocking function and an electrostatic protection function.

The varistor material layer 110a includes a varistor material. For example, the varistor material layer 110a may include ZnO, Zn, Nb, Pr, Bi, Co. And oxides of Si, Cr, and Mn. Here, a plurality of varistor material layers 110a are formed. That is, since the first inner electrodes 112, 114 and 118 or the second inner electrodes 116 are provided on one varistor material layer 110a, the arrangement of the first inner electrodes 112, 114 and 118 and the second inner electrodes 116 As shown in FIG.

The first internal electrodes 112, 114, and 118 are spaced apart from each other on the same varistor material layer 110a and include at least two or more of them. For example, the first internal electrodes 112 and 114 disposed at both ends are electrically connected to the pair of external electrodes 140, and the first internal electrodes 118 and 118 are also connected to the external electrodes 140, May be formed. At this time, the intermediate first internal electrode 118 may be disposed at a position facing a space between at least one second internal electrode 116, which will be described later. Here, the first internal electrodes 112, 114, and 118 may be spaced apart from each other by a predetermined distance.

The second internal electrode 116 is provided on at least one varistor material layer 110a different from the first internal electrodes 112, 114, and 118, For example, when there are two first internal electrodes 112 and 114, the second internal electrode 116 is disposed on only one of the first internal electrodes 112 and 114 on the cross section of the composite anti-skid device 100, In the case where the electrodes 112, 114 and 118 are three, the second internal electrode 116 may be disposed on the cross section of the composite anti-skid device 100, one each between the first internal electrodes 112, 114 and 118. At this time, the second internal electrode 116 may be disposed so as not to be electrically connected to the external electrode 140.

Here, the first internal electrodes 112, 114, and 118 and the second internal electrodes 116 are partially overlapped with each other, but the present invention is not limited thereto. The first internal electrodes 112, 114, and 118 may be disposed without overlapping each other.

At this time, the distance between the first internal electrodes 112, 114, and 118 may be greater than the distance between the first internal electrodes 112, 114, and 118 and the second internal electrodes 116. The static electricity flowing from the external electrode 140 flows through the first internal electrode 112, the second internal electrode 116, the first internal electrode 118, the second internal electrode 116, and the first internal electrode 114 Lt; RTI ID = 0.0 > 110a < / RTI >

At this time, the varistor portion 110 may be formed such that the gap between the first internal electrodes 112, 114, and 118 and the second internal electrodes 116 and the particle diameter of the varistor material satisfy the breakdown voltage Vbr. The breakdown voltage Vbr of the varistor unit 110 is applied between the first internal electrode 112 and the second internal electrode 116, between the second internal electrode 116 and the first internal electrode 118, The sum of the unit breakdown voltages between the internal electrode 118 and the second internal electrode 116 and between the second internal electrode 116 and the first internal electrode 114, respectively.

The breakdown voltage Vbr of the varistor part 110 may be greater than the rated voltage Vin of the external power source so as to block the leakage current due to the external power source of the portable electronic device to which the hybrid anti- have. Here, the external power source may be a commercial power source.

Accordingly, when the static electricity is introduced, the varistor part 110 can be turned on to pass the static electricity because the voltage of the static electricity is larger than the breakdown voltage Vbr. In addition, when the leakage current due to the external power source flows, The breakdown voltage Vbr is larger than the rated voltage of the power supply, so that the leakage current can be cut off.

Although the second internal electrode 116 is shown as being not connected to the external electrode 140, the present invention is not limited thereto. The first internal electrode 112, the second internal electrode 114, The first internal electrode 112 may be connected to one external electrode 140 and the second internal electrode 116 may be connected to the other external electrode 140.

In addition, the first internal electrodes 112, 114, and 118 may be disposed above and below the second internal electrode 116. That is, the varistor material layer 110a including the varistor material layer 110a having the first internal electrodes 112, 114, and 118 and the second internal electrode 116 may be repeatedly stacked. Accordingly, since a plurality of static electricity paths are provided in parallel, the response characteristic to static electricity can be further improved.

At this time, the first internal electrodes 112 and 114 and the second internal electrodes 116 may include at least one of Ag, Pd, Pt, Au, Ni, and Cu. For example, since the first internal electrodes 112, 114, and 118 and the second internal electrode 116 may be deteriorated in electrostatic ESD resistance when Ag is used alone, Ag may contain at least one of the components listed above and may be alloyed .

The capacitor portion 120 includes a dielectric sheet layer 120a and capacitor electrodes 122,

The dielectric sheet layer 120a may include at least one or more of Ba, Ti, Si, Sr, Bi, W, and Nd oxides as a main component including BaTiO ₃ . Here, the plurality of dielectric sheet layers 120a are formed. That is, since one capacitor electrode 122 and 124 is provided on one dielectric sheet layer 120a, the capacitor electrodes 122 and 124 may be formed in plural numbers according to the arrangement of the capacitor electrodes 122 and 124. [

As described above, by implementing the capacitor unit 120 using different kinds of dielectrics different from the varistor material, the varistor unit 110, which is not easy to implement a large capacitance, can be complemented to easily realize capacitance with various values in a large capacity .

Particularly, the capacitor unit 120 eliminates the influence of the varistor unit 110, so that the interval between the capacitor electrodes 122 and 124 laminated in the inside can be more densely formed, thereby increasing the number of stacked capacitor electrodes 122 and 124 , It is easy to realize a capacitance of a high capacity by using the dielectric sheet layer 120a having high dielectric constant.

Thus, the capacitor unit 120 can transmit the per-band communication signal corresponding to the communication purpose without attenuation.

Capacitor electrodes 122 and 124 may be provided one on each dielectric sheet layer 120a.

As described above, the capacitor unit 120 may include a plurality of dielectric sheet layers 120a having the capacitor electrodes 122 and 124 sequentially stacked. Here, the dielectric sheet layers 120a each having the capacitor electrodes 122 and the capacitor electrodes 124 at positions symmetrical to each other can be alternately stacked.

At this time, the capacitor unit 120 may have an insulation breakdown voltage Vcp that is higher than the rated voltage Vin of the external power source. Accordingly, when the leakage current due to the external power source flows into the capacitor unit 110, the capacitor unit 110 can prevent the user from electric shock by blocking the leakage current.

Here, the distance between the capacitor electrodes 122 and 124 may be 20 占 퐉 or more. As described above, by sufficiently ensuring the interval between the capacitor electrodes 122 and 124, the capacitance suitable for wireless communication can be realized and the dielectric breakdown voltage Vcp for blocking the leakage current can be increased.

At this time, the capacitor electrodes 122 and 124 may include at least one of Ag, Pd, Pt, Ni, Au, and Cu. For example, the capacitor electrodes 122 and 124 may be alloyed by containing at least one of the above-listed components in the Ag since ESD resistance may deteriorate when Ag alone is used.

Here, the varistor portion 110 and the capacitor portion 120 may have substantially the same thickness, but the present invention is not limited thereto. The varistor portion 110 and the capacitor portion 120 may have different thicknesses depending on the application. At this time, the sum of the thicknesses of the varistor part 110 and the capacitor part 120 is set so as to satisfy the specification of the composite anti-skid device 100. For example, in the case of the 1005 standard (1 mm width and 0.5 mm length), the varistor portion 110 and the capacitor portion 120 are each 0.3 mm or less in total thickness of the composite anti-skid device 100 It may be provided in a thickness of 1/3 to 2/3 times.

The barrier layer 130 is disposed between the varistor portion 110 and the capacitor portion 120. The barrier layer 130 may include a varistor material layer 110a and a dielectric sheet layer 120a constituting the varistor part 110 and the capacitor part 120 when the varistor part 110 and the capacitor part 120 are simultaneously fired. To prevent each of the materials constituting the layer from moving to another layer during the co-firing process.

At this time, the barrier layer 130 is made of ZrO ₃ as a main component and an insulator containing a relatively small amount of ZnO as compared with ZrO ₃ for controlling the shrinkage ratio after firing of the varistor part 110 and the capacitor part 120 . For example, the barrier layer 130 may contain 0.5 to 1.5 wt% of ZnO. That is, the barrier layer 130 may have a composition of ZrO ₃ and ZnO of about 9: 1.

Thereby, there is a possibility of transferring material from the barrier layer 130 to the varistor part 110 or the capacitor part 120 from the varistor part 110 or the capacitor part 120, Substance transfer can be substantially inhibited.

As a result, the material flow between the varistor part 110 and the capacitor part 120 can be suppressed by the barrier layer 130 so that the material of the capacitor part 120 can be prevented from being mixed with the material of the varistor part 110 It is possible to suppress the mixing of the varistor material and warping phenomena due to the difference in shrinkage ratio occurring in the simultaneous firing process of different materials. Therefore, it is possible to provide sufficient ESD characteristic inherent to the varistor, The communication signal can be passed smoothly.

The barrier layer 130 is formed of an insulator to completely isolate the varistor portion 110 and the capacitor portion 120 from each other to electrically isolate the characteristics of the varistor portion 110 and the capacitor portion 120 from each other. Therefore, the respective electrostatic protection functions and the communication signal passing function are not interfered with each other, and deterioration of the characteristics of the element parts can be suppressed.

Since the barrier layer 130 contains ZnO similar to the materials of the varistor part 110 and the capacitor part 120, the adhesion affinity to the varistor part 110 and the capacitor part 120 is high, It is possible to stably secure the coupling property between the varistor part 110 and the capacitor part 120 when co-firing.

At this time, the proportion of ZnO contained in the barrier layer 130 can be adjusted according to the shrinkage ratio due to the physical properties of the varistor portion 110 and the capacitor portion 120.

As a result, the barrier layer 130 has a function of joining the varistor portion 110 and the capacitor portion 120, and a function of electrically and thermally separating the varistor portion 110 and the capacitor portion 120 to prevent deterioration of characteristics .

As a result, it is possible to prevent deterioration of mutual characteristics due to different temperature characteristics of the varistor portion 110 and the capacitor portion 120, and thus to provide excellent ESD resistance inherent to the varistor and to provide stable temperature characteristics And it is possible to easily realize a capacitance of a high capacity which can smoothly transmit a communication signal. Typically, when using this device as a matching device, a capacitance value of 30 pF to 150 pF can be used the most.

The external terminal 140 is provided on both sides of the varistor part 110 and the capacitor part 120 and is connected to the plurality of capacitor electrodes 122 and 124 and the first internal electrodes 112, 114 and 118 or the second internal electrodes 116, It is made up of a pair.

The external terminal 140 is an electrode for electrically connecting the varistor part 110 and the capacitor part 120 in parallel and soldering the composite anti-static device 100 to the circuit board, Shape.

Thereby, the varistor portion 110 and the capacitor portion 120 selectively operate with respect to the static electricity, the leakage current of the external power supply, and the communication signal, so that the hybrid type anti-electric device 100 can be protected against static electricity, Transfer function can be performed.

At this time, the external terminal 140 may include Ag and glass. Thus, it is possible to improve the electrical characteristics of connection to the first internal electrodes 112, 114, and 218 or the second internal electrodes 116, and to improve the adhesion to the varistor part 110 and the capacitor part 120.

In addition, the external terminal 140 may have a minimum adjacent distance between the first internal electrode 112, 114, and 118 or the second internal electrode 116 that is not connected to the external terminal 140, As a result, it is possible to prevent a signal, such as static electricity, traveling between the first internal electrodes 112, 114, and 118 and the second internal electrodes 116 from being changed in the path to the external terminal 140, as described above.

In addition, the external terminal 140 may have a minimum adjacent distance with the capacitor electrodes 122 and 124 not connected to the external terminal 140 of 20 m or more. That is, the distance between one capacitor electrode 122 and the external terminal 140 connected to the other capacitor electrode 124 may be 20 μm or more.

Here, the external terminal 140 may further be plated with Ni / Sn or Ni / Au to improve the bonding property with the outside of the circuit board and the like and electrical characteristics.

Meanwhile, in the composite type anti-electrostatic device 200 according to the second embodiment of the present invention, the metal electrode 232 may be disposed in the barrier layer 230.

2, the hybrid anti-electrostatic device 200 may further include a single-layer metal electrode 232 in the barrier layer 230. [

At this time, the barrier layer 230 may include a plurality of insulating layers. For example, since the metal electrode 232 is provided on one insulating layer, another insulating layer may be provided on the upper side of the metal electrode 232. That is, the barrier layer 130 may include a plurality of insulating layers depending on the number of stacked metal electrodes 232.

Since the firing temperature of the metal is lower than that of the insulators of the varistor part 110, the capacitor part 120 and the barrier layer 230, the metal electrode 232 is sintered earlier than the firing step, And the material of the capacitor unit 120 can be further suppressed.

The metal electrode 232 is provided to have an area approximate to the junction area between the varistor part 110 and the capacitor part 120 in order to minimize the mass transfer between the varistor part 110 and the capacitor part 120 . And may preferably be formed to have an area smaller than the bonding area.

Here, the metal electrode 232 may not be connected to the varistor portion 110 and the pair of external electrodes 140 disposed on both sides of the capacitor portion 120. That is, when both ends of the metal electrode 232 are electrically connected to the external electrode 140, the composite type anti-skid device 100 is short-circuited. To prevent this, the metal electrode 232 is connected to the external electrode 140, respectively. For example, both ends of the metal electrode 232 may be disposed so as to be separated from the outer electrode 140 by 20 占 퐉 or more.

Since the electrode layer having a relatively lower firing temperature than the varistor portion 110 and the capacitor portion 120 is provided in the barrier layer 230 as described above, the material movement between the varistor portion 110 and the capacitor portion 120 can be effectively Can be blocked.

However, when the electrode layer includes a glass having a low firing temperature, the firing temperature of the glass is lower than that of the varistor portion 110 and the capacitor portion 120, so that the glass can be firstly sintered to suppress the movement of the material at high temperature. However, It is not suitable to form an electrode layer using a glass because a defect occurs inside.

Meanwhile, in the hybrid anti-electric device 300 according to the third embodiment of the present invention, two layers of first and second metal electrodes 332 and 334 may be disposed in the barrier layer 330.

As shown in FIG. 3, the hybrid anti-electrostatic device 300 may include first and second metal electrodes 332 and 334 in a double layer in a barrier layer 330.

The first and second metal electrodes 332 and 334 are electrically connected to the varistor part 110 or the capacitor part 120 even if the material of the varistor part 110 or the capacitor part 120 moves through one metal electrode. By suppressing the movement, mass transfer between the varistor portion 110 and the capacitor portion 120 can be further suppressed.

In addition, the first and second metal electrodes 332 and 334 may be connected to the external electrode 140 in a state where the first and second metal electrodes 332 and 334 partially overlap each other in the vertical direction. That is to say, since one end of the first metal electrode 332 and one end of the second metal electrode 224 are connected to the outer electrode 140, the gap between the varistor portion 110 and the capacitor portion 120 It is possible to suppress the movement of the material over a wider area than the single-layer metal electrode 232 of FIG.

In addition, since the first and second metal electrodes 332 and 334 are disposed in a double layer, it is not necessary to dispose the first and second metal electrodes 332 and 334 and the outer electrode 140 apart from each other to prevent short- The degree of freedom can be improved.

The first metal electrode 332 may be connected to one of the outer electrodes 140 and the second metal electrode 334 may be connected to the other outer electrode 140. At this time, the first and second metal electrodes 332 and 334 may be spaced apart from each other by a predetermined distance so as not to be short-circuited. At this time, since the barrier layer 330 is an insulator, it may not be electrically short-circuited.

Meanwhile, in the hybrid anti-electro-static device 300 'according to the fourth embodiment of the present invention, the floating metal electrodes 336 and 338 may be provided between the first and second metal electrodes 332 and 334 of the double layer.

4, the hybrid anti-electric device 300 'includes floating metal electrodes 336 and 338 spaced apart from each other by a predetermined distance between the first and second metal electrodes 332 and 334 in the blocking layer 330' As shown in FIG.

The vertical distance between the metal electrodes 332, 334, 336, and 338 is increased by the number of the floating metal electrodes 336.338 because the breakdown voltage between the outer electrodes 140 against the metal electrodes provided in the blocking layer 330 ' It is possible to arrange them close to each other, thereby suppressing an increase in volume caused by the blocking layer 330 '.

In addition, it is not necessary to reduce the volume of the varistor portion 110 or the capacitor portion 120 in order to achieve the size specification of the entirety of the hybrid anti-electric device 300 ', and deterioration of its electrical characteristics can be prevented.

At this time, the first and second metal electrodes 332 and 334 and the floating metal electrodes 336 and 338 may be spaced apart from each other by a predetermined distance in the horizontal direction and the vertical direction, and may be partially overlapped in the vertical direction.

In the composite anti-shock device 400 according to the fifth embodiment of the present invention, an air gap 436 may be provided between the first and second metal electrodes 432 and 434.

5, the hybrid anti-electrostatic device 400 may include first and second metal electrodes 432 and 434 and an air gap 436 in the barrier layer 430.

Here, the first and second metal electrodes 432 and 434 may be disposed on the same plane and connected to the external electrode 140, respectively. That is, the first and second metal electrodes 432 and 434 may be horizontally spaced apart from each other. An air gap 436 may be disposed between the first and second metal electrodes 432 and 434.

As a result, the first and second metal electrodes 432 and 434 are provided as a single layer, and movement of the material over a wider area than that of the metal electrode 232 of FIG. 2 can be suppressed. That is, since the first and second metal electrodes 432 and 434 are connected to the respective outer electrodes 140 and the material can not move through the air gap 436, the metal electrode 232 and the outer electrode 140, so that the movement of the substance can be further suppressed.

Since the first and second metal electrodes 432 and 434 and the air gap 436 are of a supercritical structure, the composite anti-electrostatic device 400 may include a suppressor in parallel with the varistor portion 110.

Accordingly, when the ESD is introduced, the varistor unit 110, which operates quickly, first clamps the voltage of the ESD to perform the electrostatic protection operation. However, when the amount of static electricity is large or static electricity is generated for a relatively long time The ESD can be further discharged by the first and second metal electrodes 432 and 434, thereby allowing the ESD protection device to further enhance the electrostatic protection characteristics of the protection device.

Meanwhile, the first and second metal electrodes 532 and 534 may be vertically spaced from each other in the composite type anti-skid device 500 according to the sixth embodiment of the present invention.

6, the hybrid anti-static device 500 may include first and second metal electrodes 532 and 534 and an air gap 536 in the barrier layer 530. [

Here, the first and second metal electrodes 532 and 534 may be vertically spaced apart and connected to the external electrode 140, respectively. At this time, the first and second metal electrodes 532 and 534 may be partially overlapped. In addition, an air gap 536 may be disposed between the first and second metal electrodes 532 and 534.

Accordingly, since the first and second metal electrodes 532 and 534 are provided in two layers and the overlapped portion is minimized compared to the metal electrodes 332 and 334 of FIG. 3, the amount of the applied metal electrode is reduced, 110 and the capacitor unit 120 can be suppressed.

Since the first and second metal electrodes 532 and 534 and the air gap 536 are of a supercell structure, the composite anti-static device 500 may include a suppressor in parallel with the varistor portion 110.

Accordingly, when the ESD is introduced, the varistor unit 110, which operates quickly, first clamps the voltage of the ESD to perform the electrostatic protection operation. However, when the amount of static electricity is large or static electricity is generated for a relatively long time When applied, the electrostatic protection characteristic of the protection device can be further improved by passing high energy through the electrostatic discharge (ESD) by the supercrelector.

Such a composite type of anti-electrostatic device (100, 200, 300, 300 ', 400, 500) may be arranged to electrically connect a conductor such as an external metal case and a circuit part in a portable electronic device. At this time, the hybrid type anti-electrostatic devices 100, 200, 300, 300 ', 400, and 500 are directly connected to the ground of the circuit part so that the static electricity introduced by turning on the varistor part 110 can be bypassed to the ground without transmitting to the circuit part.

Alternatively, when the hybrid anti-electrostatic elements 100, 200, 300, 300 ', 400, 500 are not directly connected to the ground of the circuitry, that is, they only electrically connect the conductor and circuitry to pass static electricity, It is possible to provide a separate protection element for bypassing the memory cell. Such a protection element may be a single element, a suppressor or a varistor.

As described above, when the static electricity flows from the conductor, the composite type anti-electric devices 100, 200, 300, 300 ', 400, and 500 can pass the static electricity by turning on the varistor part 110. That is, since the breakdown voltage (Vbr) of the composite-type electric-shock- resistant devices 100, 200, 300, 300 ', 400, 500 is smaller than the instantaneous voltage of the static electricity, the electric- As a result, when the static electricity is introduced from an external conductor of an electronic device such as a metal case, the electric shock resistance of the composite type electric shock protection device 100, 200, 300, 300 ', 400 or 500 is lowered so that static electricity passes therethrough. The conductor and the circuit portion can be kept open.

At this time, since the dielectric breakdown voltage Vcp of the capacitor part 120 provided in the hybrid type anti-electric devices 100, 200, 300, 300 ', 400 and 500 is larger than the breakdown voltage Vbr of the varistor part 110, 120, but can only pass through the varistor portion 110. [

When the leakage current of the external power source flows from the ground of the circuit part, the composite type anti-electrostatic devices 100, 200, 300, 300 ', 400 and 500 transmit the leakage current to the conductor by the turn-off of the varistor part 110 and the capacitor part 120 .

That is, when the leakage current of the external power source flows into the conductor through the circuit board of the circuit part, for example, the ground, the composite type anti-skid devices 100, 200, 300, 300 ', 400 and 500 are arranged such that the breakdown voltage Vbr thereof is the overvoltage It can be kept open. The composite type anti-electrostatic elements 100, 200, 300, 300 ', 400, and 500 are maintained in an open state without being electrically conducted because the breakdown voltage Vbr thereof 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 contactable conductor.

At this time, the capacitor unit 120 provided in the hybrid type anti-electrostatic devices 100, 200, 300, 300 ', 400, and 500 can block the DC component included in the leakage current, and the AC component of the leakage current is relatively low Frequency, it is possible to block the leakage current by acting with a large impedance with respect to the frequency.

As a result, the hybrid type anti-electrostatic devices 100, 200, 300, 300 ', 400, and 500 can shield the user from the electric shock by blocking the leakage current due to the external power source flowing from the ground of the circuit part.

Also, in the case where the conductor is constituted as a part of the antenna, the composite type electric shock protection device 100, 200, 300, 300 ', 400, 500 may allow a communication signal flowing through the conductor to pass by the capacitor part 120. At this time, the varistors 110 and 210 are turned off, so that the hybrid anti-skid devices 100, 200, 300, 300 ', 400 and 500 can function as a capacitor.

That is, the comb-type anti-electric devices 100, 200, 300, 300 ', 400, and 500 may keep the varistors 110 and 210 open to shut off the conductor and the circuit, but pass the communication signal through the capacitor 120. As described above, the capacitor portion 120 of the hybrid type anti-electrostatic devices 100, 200, 300, 300 ', 400, and 500 can provide the inflow path of the communication signal.

Here, the portable electronic device may be in the form of a portable electronic device that is portable and portable. For example, the portable electronic device may be a portable terminal such as a smart phone, a cellular phone, and the like, and may be a smart watch, a digital camera, a DMB terminal, an electronic book, a netbook, a tablet PC, Such electronic devices may comprise any suitable electronic components including antenna structures for communication with external devices. In addition, it may be a device using local area network communication such as WiFi and Bluetooth.

Such a portable electronic device includes an outer housing made of conductive materials such as metal (aluminum, stainless steel, etc.) or carbon-fiber synthetic material or other fiber-based composites, glass, ceramic, plastic and combinations thereof .

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

In particular, the metal case may be provided to partially surround or partially surround the side of the housing of the portable 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.

Here, the hybrid anti-shock devices 100, 200, 300, 300 ', 400, and 500 may be suitably provided in accordance with the number of metal cases provided in the housing of the portable electronic device. However, when a plurality of metal cases are provided, each of the metal cases may be embedded in the housing of the portable electronic device so that the combined type anti-electrostatic devices 100, 200, 300, 300 ', 400, and 500 are individually connected.

In addition, the hybrid type anti-electrostatic devices 100, 200, 300, 300 ', 400, and 500 may be used to connect a metal case to a circuit board or to provide a matching circuit (for example, R and L components) between a metal case and an FFM Or between the metal case with the antenna and the IC implementing the communication function through the antenna, or may be disposed between the short pin of the PIFA (Planar Inverted F Antenna) antenna and the matching circuit .

Further, the conductor may include a tip portion protruding outward from the conductive case. In one example, the conductor may include a side key. The distal end portion may include one end of a connector insertion port into which a connector, for example, an earphone, a charging cable, a data cable, or the like, is inserted.

That is, in the case of connecting the circuit portions to the outwardly protruding portion or the pointed portion, which is highly likely to enter the static electricity, the composite type electric shock protection devices 100, 200, 300, 300 ', 400 and 500 according to the embodiment of the present invention, A high response characteristic and a high capacity capacitance can be realized at the same time.

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.

Claims (13)

1. A varistor portion including at least two first inner electrodes provided in one of the varistor material layers and at least one second inner electrode provided in the other varistor material layer;

   A capacitor portion including a plurality of dielectric sheet layers and a plurality of capacitor electrodes provided on the dielectric sheet layers;

   A barrier layer disposed between the varistor part and the capacitor part; And

   And a pair of external terminals provided on both sides of the varistor portion and the capacitor portion and connected to the plurality of capacitor electrodes, the first internal electrode, or the second internal electrode,

   The varistor portion, the capacitor portion, and the barrier layer are stacked and co-fired in a green sheet state,

   The barrier layer is mainly composed of ZrO _3, wherein the capacitor section and the hybrid electric shock prevention insulator containing ZnO for shrinkage control the varistor device portion.
2. The method according to claim 1,

   Wherein the barrier layer blocks mass transfer between the varistor part and the capacitor part.
3. The method according to claim 1,

   Wherein the insulator contains 0.5 to 1.5 wt% of ZnO.
4. The method according to claim 1,

   Wherein the barrier layer further comprises a metal electrode.
5. 5. The method of claim 4,

   Wherein the metal electrode is not connected to the pair of external electrodes.
6. 5. The method of claim 4,

   The metal electrode

   A first electrode connected to one of the pair of external electrodes; And

   And a second electrode connected to the other one of the pair of external electrodes and spaced apart from the first electrode by a predetermined distance.
7. The method according to claim 6,

   Wherein the first electrode and the second electrode are arranged vertically or coplanarly.
8. The method according to claim 6,

   Wherein the insulator includes an air gap between the first electrode and the second electrode.
9. The method according to claim 1,

   The varistor material layer includes ZnO as a main component, Zr, Nb, Pr, Bi, Co. At least one or more oxides of Si, Cr, and Mn,

   Wherein the dielectric sheet layer comprises BaTiO ₃ as a main component and at least one or more oxides of Ti, Si, Sr, Bi, W, and Nd.
10. The method according to claim 1,

    Wherein the capacitor electrode, the first internal electrode, and the second internal electrode include at least one of Ag, Pd, Pt, Au, Ni, and Cu.
11. The method according to claim 1,

    And the distance between the capacitor electrodes is 20 占 퐉 or more.
12. A conductor including a tip portion protruding outward from the conductive case;

    Circuitry; And

    The portable electronic device according to any one of claims 1 to 11, which electrically connects the conductor and the circuit portion.
13. 13. The method of claim 12,

    The conductor includes a side key,

    And the tip portion includes one end of an insertion port of a connector for connection with an external device.

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