KR101578543B1 - Circuit protection device and mobile electronic device with the same - Google Patents

Circuit protection device and mobile electronic device with the same Download PDF

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Publication number
KR101578543B1
KR101578543B1 KR1020150094275A KR20150094275A KR101578543B1 KR 101578543 B1 KR101578543 B1 KR 101578543B1 KR 1020150094275 A KR1020150094275 A KR 1020150094275A KR 20150094275 A KR20150094275 A KR 20150094275A KR 101578543 B1 KR101578543 B1 KR 101578543B1
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South Korea
Prior art keywords
material layer
varistor material
electronic device
internal
conductor
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KR1020150094275A
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Korean (ko)
Inventor
임병국
김리언
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주식회사 아모텍
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/1013—Thin film varistors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0067—Devices for protecting against damage from electrostatic discharge

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

An electric shock protection device and a portable electronic device having the same are provided. An electric shock protection device according to an exemplary embodiment of the present invention is an electric shock protection device disposed between a human contactable conductor of an electronic device and an internal circuit portion and includes at least two alternately stacked layers of a first varistor material layer and a second varistor material layer A varistor material layer; A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer so as to allow the static electricity to pass therethrough without dielectric breakdown during the introduction of static electricity from the conductor, The leakage current of the external power supply is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device.

Description

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

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

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

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

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

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

Such a leakage current can be transmitted to a conductor that can be contacted with a human body as in an external case of a portable electronic device. As a result, the user can give an unpleasant feeling of crushing and, in severe cases, There is a fear of wearing.

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

KR 0573364 B

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric shock protection device capable of protecting an internal circuit and / or a user from a leakage current due to static electricity or an external power source and a portable electronic device having the same. have.

In order to solve the above-described problems, the present invention provides an electric shock protection device disposed between a human contactable conductor of an electronic device and an internal circuit portion. At least two varistor material layers in which a first varistor material layer and a second varistor material layer are stacked; A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer so as to allow the static electricity to pass therethrough without dielectric breakdown during the introduction of static electricity from the conductor, The leakage current of the external power supply is cut off.

Vbr> Vin

Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,

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

In addition, the rated voltage may be a national standard rated voltage.

The first internal electrode and the second internal electrode may be arranged so that at least a part thereof overlaps each other.

The first internal electrode and the second internal electrode may be arranged so as not to overlap each other.

The distance L between the first internal electrode and the second internal electrode may be set to be the shortest distance d1 between the first internal electrode and the second internal electrode, (d2).

In addition, a plurality of the first varistor material layer and the second varistor material layer may be alternately stacked.

The first varistor material layer and the second varistor material layer may be either a semiconductive material containing at least one of ZnO, SrTiO3, BaTiO3, and SiC, or a Pr and Bi-based material.

In addition, the thickness of the internal electrode may be 2-10 탆.

On the other hand, the present invention provides a human body contactable conductor; Circuitry; And an electric shock protection element disposed between the conductor and the circuit part. The present invention provides a portable electronic device having an electric shock protection function with an electric shock protection function. Here, the electric shock protection device includes at least two varistor material layers in which a first varistor material layer and a second varistor material layer are laminated; A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer so as to allow the static electricity to pass therethrough without dielectric breakdown during the introduction of static electricity from the conductor, The leakage current of the external power supply is cut off.

Vbr> Vin

Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,

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

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

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

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

According to an embodiment of the present invention, there is provided an electric shock protection device and a portable electronic device including the electric shock protection device. In the portable electronic device in which a conductor such as a metal case is exposed to the outside, There is an advantage that the user and the internal circuit can be protected from the leakage current and the static electricity due to the leakage current.

1 is an overall perspective view illustrating an electric shock protection device according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view showing the lamination relationship of the plurality of sheet layers in Fig. 1;
Figures 3a and 3b are longitudinal sectional views of Figure 1;
4A and 4B are conceptual diagrams showing application examples of an electric shock protection device according to an embodiment of the present invention.
5A and 5B are schematic equivalent circuit diagrams for explaining operation of (a) leakage current and (b) static electricity (ESD) of an electric shock protection device according to an embodiment of the present invention.
6A and 6B are views illustrating an example of a varistor material layer and an internal electrode in an electric shock protection device according to an embodiment of the present invention.
7A and 7B are views showing another example of a varistor material layer and an internal electrode in an electric shock protection device according to an embodiment of the present invention.
8A and 8B are views showing another example of a varistor material layer and internal electrodes in an electric shock protection device according to an embodiment of the present invention.

Hereinafter, 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 to 3, the electric shock protection device 100 according to an embodiment of the present invention includes varistor material layers 110 and 120 and a plurality of internal electrodes 112, 112 'and 122, , And a varistor.

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

 Vbr> Vin

Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,

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

The rated voltage may be a standard rated voltage for each country, for example, 240V, 110V, 220V, 120V, 110V, and 100V.

At this time, the varistor material layer may include at least two layers of the first varistor material layer 110 and the second varistor material layer 120 alternately. Here, the first varistor material layer 110 and the second varistor material layer 120 may be any one of a semiconductive material containing at least one of ZnO, SrTiO3, BaTiO3, and SiC, or a Pr and Bi-based material have. In addition, it is preferable that the varistor material layer is set so that the particle size of the varistor material can satisfy the breakdown voltage (Vbr).

The internal electrodes are separated from the first varistor material layer 110 by a predetermined distance L on the plurality of first internal electrodes 112 and 112 'and the second varistor material layer 120, And a plurality of second internal electrodes 122,

Here, the breakdown voltage Vbr of the varistor 100 may be the sum of the unit breakdown voltages formed between the first internal electrodes 112 and 112 'and the second internal electrodes 122, respectively. That is, the breakdown voltage Vbr of the varistor 100 is a ratio between the unit breakdown voltage formed between the first internal electrodes 112 and 112 'and the second internal electrode 122, and the first internal electrodes 112 and 112 ') And the number of the second internal electrodes 122.

At this time, the first internal electrodes 112 and 112 'and the second internal electrodes 122 may have a thickness of 2 to 10 탆. If the thicknesses of the first inner electrodes 112 and 112 'and the second inner electrodes 122 are less than 2 탆, they can not serve as internal electrodes. If the thickness is more than 10 탆, Therefore, the thickness of the internal electrode or varistor material layer arranged in parallel increases, and the overall size of the electric shock protection device 100 increases, which may adversely affect miniaturization.

Each of the first internal electrodes 112 and 112 'and the second internal electrodes 122 may be disposed so that at least a part thereof is not overlapped. That is, each of the first internal electrodes 112 and 112 'and the second internal electrodes 122 may be disposed so as to be at least partially overlapped with each other, or may be disposed between the first and second internal electrodes 112 and 122 so as not to overlap each other.

At this time, the first internal electrode or the second internal electrode does not leak static electricity or leakage current to adjacent external electrodes (not shown) of the internal electrodes 112, 112 ', 122, It is preferable that the interval is set so as to proceed normally.

For example, the spacing L between one of the first internal electrodes 112 and 112 'and the neighboring second internal electrodes 122 is greater than the spacing L between the first internal electrodes 112 and 112' (D2) between the shortest distance (d1) between the adjacent second internal electrodes (122) and the shortest distance (d2) between the neighboring second internal electrodes (122).

In addition, it is preferable that the distance between the second internal electrode 122 and the adjacent external electrode (not shown) is larger than the distance between the first internal electrode 112 and the second internal electrode 122.

Specifically, the first varistor material layer 110 may include two first internal electrodes 112 and 112 ', and the two first internal electrodes 112 and 112' may be spaced apart on the same plane .

The second varistor material layer 120 may include a second internal electrode 122 on one surface thereof.

At this time, the first varistor material layer 110 and the second varistor material layer 120 are formed so that the second internal electrodes 122 are separated from the first internal electrodes 112 and 112 ' And are stacked in the upward and downward directions so as to be disposed.

In addition, the second internal electrode 122 may be arranged such that both end portions thereof overlap with one end side of the first internal electrodes 112 and 112 '. To this end, the center of the second internal electrode 122 may be located at the center of the gap L1 formed between the two first internal electrodes 112 and 112 '.

Here, the first varistor material layer 110 in which the two first internal electrodes 112 and 112 'are formed may include a second varistor material layer (not shown) in which one second internal electrode 122 is formed 120 and may be deposited on the bottom of the second varistor material layer 120, as shown in Figure 3B.

The number of the first inner electrodes 112 and 112 'and the second inner electrodes 122 may be determined to satisfy the breakdown voltage Vbr of the varistor 100 according to the unit breakdown voltage formed therebetween. 1 to 3, the number of unit elements formed by the first internal electrodes 112 and 112 'and the second internal electrodes 122 is two. However, the present invention is not limited thereto. As shown in FIG.

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

Here, the portable electronic device 10 may be in the form of a portable electronic device that is portable and portable. For example, the portable electronic device may be a portable terminal such as a smart phone, a cellular phone, and the like, and may be a smart watch, a digital camera, a DMB, an electronic book, a netbook, a tablet PC, Such electronic devices may comprise any suitable electronic components including antenna structures for communication with external devices. In addition, it may be a device using local area network communication such as Wi-Fi and Bluetooth.

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

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

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

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

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

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

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

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

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

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

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

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

5B, when the static electricity flows from the outside through the conductor 12, the electric shock protection element 100 functions as an electrostatic protection element such as a varistor. That is, since the breakdown voltage Vbr of the varistor is smaller than the instantaneous voltage of the static electricity, the electric shock protection element 100 can be electrically conducted to pass the static electricity. As a result, since the first internal electrodes 112 and 112 'and the second internal electrodes 122 are provided in the varistor material layer, the electric shock protection device 100 can prevent the nonlinear voltage characteristics of the varistor material The electrical resistance between the first internal electrodes 112 and 112 'and the second internal electrodes 122 is lowered, so that the static electricity can be passed without being electrically broken.

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

Hereinafter, various embodiments of the electric shock protection device according to the embodiment of the present invention will be described in more detail with reference to FIG. 6 to FIG.

The electric shock protection device 200 may include a plurality of unit elements formed by the first internal electrodes 212 and 212 'and the second internal electrodes 222 in parallel.

6A and 6B, the electric shock protection device 200 includes two first varistor material layers 210 formed with two first internal electrodes 212 and 212 'and one second internal electrode 210' The second varistor material layer 220 may be alternately stacked.

At this time, the two first varistor material layers 210 may be stacked on top and bottom of the second varistor material layer 220, respectively. The second internal electrode 222 formed on the second varistor material layer 220 has first and second internal electrodes 212 and 212 'disposed on both ends thereof and a second internal electrode 222 disposed on the lower portion thereof. And are arranged so as to overlap with each other at a certain region.

The first inner electrodes 212 and 212 'disposed on the second varistor material layer 220 and the first inner electrodes 212 and 212' disposed on the lower portion of the second varistor material layer 120 may be formed of And the second internal electrode 222 may be disposed between the first internal electrodes 212 and 212 'that are spaced apart in the vertical direction.

At this time, the central portion of the second internal electrode 222 may be positioned at the center of the gap L formed between the two first internal electrodes 212 and 112 'disposed on the same plane.

The first varistor material layer 210 and the second varistor material layer 220 may be formed between the first and second inner electrodes 212 and 212 and the gaps d1 and d2 between the first and second inner electrodes 222 and 222, Can be arranged in various stacking orders while satisfying the spacing L of the protrusions.

As described above, by stacking a plurality of the first varistor material layers 210 and the second varistor material layers 220, the discharge path of the static electricity is increased, so that resistance to static electricity can be improved.

7A and 7B, the electric shock protection device 200 'includes one first varistor material layer 210 having two first internal electrodes 212 and 212' and one first varistor material layer 210 having two first internal electrodes 212 and 212 ' And two second varistor material layers 220 formed with two internal electrodes 222 may be alternately laminated.

At this time, the two second varistor material layers 220 may be stacked on top and bottom of the first varistor material layer 210, respectively.

Here, the second internal electrode 222 formed on the second varistor material layer 220 has a pair of first internal electrodes 212 and 212 'that are spaced apart from each other at upper and lower ends, .

At this time, it is preferable that the interval of the second internal electrode 222 is set so that the static electricity or the leakage current does not leak to the external electrode (not shown) but can proceed normally to the first internal electrode 212 '. For example, it is preferable that the distance between the second internal electrode 222 and the adjacent external electrode (not shown) is larger than the gaps d1 and d2 between the first internal electrodes 212 and 212 '.

8A and 8B, in the electric shock protection device 200 ', the unit elements formed by the first internal electrodes 212 and 212' and the second internal electrodes 222 may be connected in parallel or And may be provided in plural in series.

That is, a plurality of the first varistor material layer 210 and the second varistor material layer 220 may be alternately stacked in the vertical direction. Considering the limitations on the interval between the internal electrodes 212, 212 ', 222 and the external electrodes (not shown), the uppermost layer and the lowermost layer are laminated so that internal electrodes connected to external electrodes desirable. For example, as shown in FIG. 8A, a first internal electrode 212 connected to an external electrode (not shown) may be disposed on the uppermost layer and the lowermost layer.

As described above, since the plurality of first varistor material layers 210 and the second varistor material layers 220 are stacked, the electric discharge path of static electricity is increased, thereby improving the resistance to static electricity .

The number of the first inner electrodes 112 and 112 'and the second inner electrodes 122 may be determined to satisfy the breakdown voltage Vbr of the varistor 100 according to the unit breakdown voltage formed therebetween. That is, as shown in FIG. 8B, a plurality of first inner electrodes 212, 212 ', 212' 'are formed on the same plane in parallel to each other, The second varistor material layer 320 'may be formed in a stacked structure in which the electrodes 222, 222', and 222 'are formed on the same plane and spaced apart in parallel in a horizontal direction.

In this case, a plurality of neighboring first internal electrodes 212, 212 ', 212''are disposed between the second internal electrodes 222, 222', and 222 ' .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: portable electronic device 12a, 12b, 12c, 12d: conductor
14:
100, 200, 200:
110, 120, 210, 220: varistor material layer
112, 112 ', 122, 212, 212', 212 ", 222, 222 ', 222"

Claims (13)

delete delete An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
At least two varistor material layers having a first varistor material layer and a second varistor material layer stacked;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer,
Wherein each of the first internal electrode and the second internal electrode is disposed so as to overlap at least a part thereof,
Wherein the static electricity is passed without passing through the insulation when the static electricity flows from the conductor, and the leakage current of the external power supply flowing from the ground of the circuit part is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
At least two varistor material layers having a first varistor material layer and a second varistor material layer stacked;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer,
Wherein the first internal electrode and the second internal electrode are disposed so as not to overlap with each other,
Wherein the static electricity is passed without passing through the insulation when the static electricity flows from the conductor, and the leakage current of the external power supply flowing from the ground of the circuit part is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
At least two varistor material layers having a first varistor material layer and a second varistor material layer stacked;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer,
The spacing L between the first internal electrode and the second internal electrode is set to be the shortest distance d2 between the first internal electrode and the second internal electrode and between the shortest distance d1 between the first internal electrode and the second internal electrode, ), ≪ / RTI >
Wherein the static electricity is passed without passing through the insulation when the static electricity flows from the conductor, and the leakage current of the external power supply flowing from the ground of the circuit part is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
At least two varistor material layers having a first varistor material layer and a second varistor material layer stacked;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer,
Wherein a plurality of the first varistor material layer and the second varistor material layer are alternately stacked,
Wherein the static electricity is passed without passing through the insulation when the static electricity flows from the conductor, and the leakage current of the external power supply flowing from the ground of the circuit part is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
At least two varistor material layers having a first varistor material layer and a second varistor material layer stacked;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer,
Wherein the first varistor material layer and the second varistor material layer are any one of a semiconductive material comprising at least one of ZnO, SrTiO3, BaTiO3, and SiC, or a Pr and Bi-based material,
Wherein the static electricity is passed without passing through the insulation when the static electricity flows from the conductor, and the leakage current of the external power supply flowing from the ground of the circuit part is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device An electric shock protection element disposed between a human contactable conductor of an electronic device and an internal circuit portion,
At least two varistor material layers having a first varistor material layer and a second varistor material layer stacked;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer,
The thickness of the internal electrode is 2-10 탆,
Wherein the static electricity is passed without passing through the insulation when the static electricity flows from the conductor, and the leakage current of the external power supply flowing from the ground of the circuit part is cut off.
Vbr> Vin
Here, Vbr is the sum of the breakdown voltages formed between the first adjacent first inner electrode and the second inner electrode,
Vin is the rated voltage of the external power supply of the electronic device Human contactable conductors;
Circuitry; And
A portable electronic device having an electric shock protection function comprising the electric shock protection element according to any one of claims 3 to 8 arranged between the conductor and the circuit part. 10. The method of claim 9,
Wherein the conductor has at least one of an antenna, a metal case, and a conductive ornamental for communication between the electronic device and an external device. 11. The method of claim 10,
Wherein the metal case has an electric shock protection function that partially surrounds or entirely surrounds the side of the housing of the electronic device. 11. The method of claim 10,
Wherein the metal case is provided so as to surround a camera provided to be exposed to the outside on a front surface or a rear surface of the housing of the electronic device. 9. The method according to any one of claims 3 to 8,
Wherein the rated voltage is any one of 240V, 110V, 220V, 120V, and 100V.
KR1020150094275A 2014-11-20 2015-07-01 Circuit protection device and mobile electronic device with the same KR101578543B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114270455A (en) * 2019-11-08 2022-04-01 Tdk电子股份有限公司 Piezoresistor comprising floating or dummy or separated internal electrodes

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Publication number Priority date Publication date Assignee Title
KR100573364B1 (en) * 2005-06-11 2006-04-26 주식회사 이노칩테크놀로지 Chip type surge arrester
KR101452540B1 (en) * 2007-05-03 2014-10-21 에프코스 아게 Electric multi-layer component with electrically non-contacted protective structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100573364B1 (en) * 2005-06-11 2006-04-26 주식회사 이노칩테크놀로지 Chip type surge arrester
KR101452540B1 (en) * 2007-05-03 2014-10-21 에프코스 아게 Electric multi-layer component with electrically non-contacted protective structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114270455A (en) * 2019-11-08 2022-04-01 Tdk电子股份有限公司 Piezoresistor comprising floating or dummy or separated internal electrodes

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