WO2016148546A1

WO2016148546A1 - Electric shock protection device and portable electronic device equipped with same

Info

Publication number: WO2016148546A1
Application number: PCT/KR2016/002790
Authority: WO
Inventors: 강승진; 이승철
Original assignee: 주식회사 아모텍
Priority date: 2015-03-18
Filing date: 2016-03-18
Publication date: 2016-09-22
Also published as: KR20170076637A; KR20160113054A; KR20160113056A; KR101978426B1; KR102119512B1; KR101673219B1; KR20160113055A

Abstract

Provided is an electric shock protection device. An electric shock protection device according to one embodiment of the present invention comprises: a body which has a volume of 0.025 to 0.060 mm³and comprises a barium titanate-based component and a vitreous component; and an internal electrode disposed within the body, and is embodied such that an electric shock protection function of preventing leakage current or static from being introduced into the electric shock protection device is combined with a signal transfer function of letting incoming data signals through the electric shock protection device by inhibiting attenuation of the incoming data signals. As such, even though the electric shock protection device is embodied to be compact and slim, the electric shock protection device may protect a user from leakage current from a power source and protect an internal circuit from outside static. In addition, the electric shock protection device has excellent durability since the same has adequate capacitance to protect against leakage current and high voltage, and also does not easily succumb to dielectrical breakdown. Further, the electric shock protection device may ensure good data communication efficiency by minimizing attenuation of data reception signals in a communication frequency bandwidth, and has ease of handling as the mechanical strength of the device is good.

Description

Electric shock protection device and portable electronic device having same

The present invention relates to an electric shock protection device, and more particularly, even if the size of the light and small, it is not easily broken by external static electricity, excellent mechanical strength and excellent durability, electric shock that does not attenuate data reception signal in the communication frequency range A protective device and a portable electronic device having the same.

Recently, with the development of electronic device technology, various kinds of mobile electronic devices such as MP3, mobile phones, and smart watches have been miniaturized. Since these electronic devices have a very high level of contact with the human body compared to the electronic devices used in a specific place, a technology for protecting the human body and the devices of the electronic devices from voltages caused by leakage current, static electricity, and other excessive pulses Is required. In particular, the adoption of metal cases that give a sense of luxury in conjunction with the high-end of mobile devices is increasing. However, since the metal housing has excellent electrical conductivity due to the characteristics of the material, an electrical path may be formed between the external housing and the internal circuit part through a specific device or according to a portion thereof. In particular, as the metal housing and the circuit part form a loop, when a static electricity having a high voltage is momentarily introduced through a conductor such as a metal housing having a large external exposed area, the circuit part such as an IC may be damaged. Measures are required.

In addition, such a portable electronic device typically uses a charger to charge a battery. Such a charger rectifies external AC power to DC power, and then converts it into a low DC power supply suitable for portable electronic devices through a transformer. However, when the Y-CAP provided for electrical insulation such as a non-genuine charger does not have regular characteristics, the DC power may not be sufficiently cut off by the Y-CAP, and furthermore, a leakage current may be generated by the AC power. This leakage current can propagate along the ground of the circuit. Since the leakage current may be transmitted to a conductor that can be contacted by a human body, such as an external case of a portable electronic device, as a result, the user may be offended and, in severe cases, the user may be fatally wounded by an electric shock.

Accordingly, in recent years, a protection device for preventing high voltage static electricity or leakage current has been developed, but when a smaller and slim implementation is implemented according to a light and small portable device, there is a problem of easy insulation breakdown by static electricity generated at a high voltage instantaneously. . In addition, the smaller and slimmer the protection device is, the less there is room for structural design change in the protection device to have sufficient capacitance to prevent leakage current and high voltage static electricity. Even if the design is changed minutely, the internalized structure is more easily destroyed by leakage current and high voltage static electricity, and there is a problem that only one-time protection is possible. Furthermore, the capacitance of the protection device is reduced as it becomes smaller and slimmer. If the protection device is electrically connected to a communication-related component such as an antenna in a circuit, the data reception signal in the communication frequency range is attenuated, thereby significantly reducing communication efficiency. There is a problem that the same circuit is not suitable for use.

Accordingly, despite the compact and slim implementation, it has sufficient capacitance to protect leakage current and high voltage static electricity, and is not easily broken, so it is durable and does not reduce communication efficiency. There is an urgent need to develop an electric shock protection device having a limited range of possible areas.

The present invention has been made in view of the above, and in accordance with the development trend of light and small portable electronic devices, even if implemented to be small and slim, can protect the user from the leakage current by the power supply, and can protect the internal circuit from the external static electricity An object of the present invention is to provide an electric shock protection device having sufficient physical properties.

In addition, the present invention provides an electric shock protection device that has a sufficient capacitance to protect the leakage current and high voltage static electricity and at the same time does not easily break the insulation to prevent leakage current and protect the high voltage static electricity. There is a purpose.

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

Furthermore, another object of the present invention is to provide an electric shock protection device having excellent mechanical strength and improved handling of the protection device.

In addition, another object of the present invention is to provide a portable electronic device that protects a user and an internal circuit of a device from static electricity and leakage current even though the external housing is a conductive material through the electric shock protection device according to the present invention.

In order to solve the above problems, the present invention has a volume of 0.025 ~ 0.060 mm, a body comprising a barium titanate-based component and a glass component; And an internal electrode disposed inside the body, wherein an electric shock protection function that protects against leakage current and static electricity flowing into the body and a signal transmission function that suppresses and passes the attenuation of the data signal flowing into the electric shock are combined. Provide a protection device.

According to an embodiment of the present invention, the electric shock protection device is electrically connected in parallel, the electric shock protection to protect against leakage current and static electricity flowing into the inside and the signal transmission to pass through the suppression of the attenuation of the data signal flowing into It may include wealth.

In addition, the internal electrodes provided in the electric shock protection device may include at least one pair of first internal electrodes, and the first internal electrodes may be spaced apart in a horizontal direction or a vertical direction. In this case, a space between the spaced apart first inner electrodes may be further provided with a discharge material filling a part or all of the voids. In addition, the volume of the voids may be 1 to 15% of the total volume of the electric shock protection device.

In addition, the internal electrodes provided in the electric shock protection device may include at least one pair of second internal electrodes, and the second internal electrodes may be disposed to overlap at least a part of each electrode surface in the vertical direction.

The electric shock protection part may include a first internal electrode, and the signal transmission part may include a second internal electrode, and a vertical separation distance between the first internal electrode and the second internal electrode disposed adjacent to each other may be 20 to 100 μm. Can be.

In addition, the body may have a dielectric constant of 900 to 1500 to block attenuation of the incoming data signal, to prevent the passage of static electricity that flows without the breakdown of insulation, and to prevent leakage of external power.

In addition, the body may include 50 to 80 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component.

In addition, the body may have a density of 4.5 to 5.8 g / mm 3.

In addition, the body may have a thickness of 0.2 to 0.4 mm based on the thickness direction of the internal electrode.

The body may be formed by stacking and sintering a plurality of sheets including a barium titanate-based component and a glassy component, and a sheet having the internal electrode formed on one surface of the plurality of sheets may have a minimum thickness of 20 μm or more. More preferably, it may be 28-70 micrometers.

In addition, the glassy component may include aluminum oxide and silicon oxide. In this case, the glassy component may have a dielectric constant of 25 or more.

In addition, the electric shock protection device may have a capacitance of 4 ~ 100 kW.

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

The present invention also provides a human body contactable conductor; It provides a portable electronic device having a circuit portion and an electric shock protection device according to the present invention disposed between the conductor and the circuit portion.

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

In addition, in order to solve the above problems, the present invention has a volume of 0.7 to 1.0 kPa, a body comprising a barium titanate-based component and a glass component; And an internal electrode disposed inside the body, wherein an electric shock protection function that protects against leakage current and static electricity flowing into the body and a signal transmission function that suppresses and passes the attenuation of the data signal flowing into the electric shock are combined. Provide a protection device.

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

In addition, the body may include 10 to 30 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component.

In addition, the body may have a density of 4.5 to 5.8 g / mm 3.

In addition, the body may have a thickness of 0.5 to 1.0 mm based on the thickness direction of the internal electrode.

The body may be formed by stacking and sintering a plurality of sheets including a barium titanate-based component and a glassy component, and a sheet having the internal electrode formed on one surface of the plurality of sheets may have a minimum thickness of 20 μm or more. More preferably, it may be 20-70 micrometers.

In addition, in order to solve the above problems, the present invention has a volume of 0.15 ~ 0.4 mm, a body containing a barium titanate-based component and a glass component; And an internal electrode disposed inside the body, wherein an electric shock protection function that protects against leakage current and static electricity flowing into the body and a signal transmission function that suppresses and passes the attenuation of the data signal flowing into the electric shock are combined. Provide a protection device.

The electric shock protection part may include a first internal electrode, and the signal transmission part may include a second internal electrode, and a vertical separation distance between the first internal electrode and the second internal electrode disposed adjacent to each other may be 30 to 100 μm. Can be.

In addition, the body may have a dielectric constant of 650 to 950 so as to block the attenuation of the incoming data signal, to prevent the passage of static electricity that flows in and out of the leakage current of the incoming external power without breaking the insulation.

In addition, the body may include 30 to 50 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component.

In addition, the body may have a density of 4.5 to 5.8 g / mm 3.

In addition, the body may have a thickness of 0.5 to 0.85 mm based on the thickness direction of the internal electrode.

Hereinafter, the term used by this invention is demonstrated.

As used herein, the term "up and down direction" and "horizontal direction" is a relative positional relationship with respect to the thickness direction of the electrode provided in the body, and the "up and down direction" is parallel to the thickness direction of the electrode, and the " Horizontal direction ”is perpendicular to the thickness direction of the electrode. In this case, the parallel and the vertical are used to encompass all the ranges that appear parallel and vertical on the naked eye when considering the thickness direction of the electrode.

In addition, as used herein, the terms "first body" and "second body" are each functional unit, for example, an electric shock protection unit having an electric shock protection function, and a signal transmission unit having a function of passing a communication signal without attenuation. In order to facilitate the description, the cross-section of the body is expressed as the first body and the second body after partitioning in consideration of the arrangement of the internal electrodes. However, as can be seen in FIG. 7, it can be seen that the first body and the second body are not separated from each other on the cross section of the manufactured electric shock protection device and exist as one body. However, in consideration of one manufacturing process of the body, the body may be formed by stacking a plurality of sheets having one internal electrode on one sheet and then sintering the body. It will be apparent to those skilled in the art that the thickness and number of sheets forming the sheet may be indirectly inferred.

According to the present invention, even if the electric shock protection device is implemented to be small and slim in accordance with the development trend of light and small portable devices, it is possible to protect the user from the leakage current by the power supply and to protect the internal circuit from external static electricity. In addition, it has sufficient capacitance to protect leakage current and high voltage static electricity and at the same time it is not easily broken, so that leakage current can be continuously blocked and high voltage static electricity can be protected. Furthermore, even when used in a communication-related circuit, it is possible to ensure excellent data communication efficiency by minimizing attenuation of a data reception signal of a communication frequency band, thereby being free from the circuit limitation of the protection device. In addition, as the mechanical strength of the device is excellent and the handleability is improved, productivity in manufacturing the electronic device may be improved. Accordingly, even if the external housing of the electronic device is a conductive material, the user and device internal circuits are protected from static electricity and leakage current through the electric shock protection device according to the present invention, and thus the portable electronic device is widely used as a portable electronic device free from external material selection and safe for the user and the human body. Can be applied.

1 is a view of an electric shock protection device according to an embodiment of the present invention, Figure 1a is a perspective view showing the internal and external electrode arrangement of the electric shock protection device, Figure 1b is an exploded perspective view of Figure 1a, Figure 1c is a view of Figure 1a Cross-section,

2 is a cross-sectional view of an electric shock protection unit included in an electric shock protection device according to an embodiment of the present invention;

3 is a view of the electric shock protection device according to an embodiment of the present invention, Figure 3a is a perspective view showing the internal and external electrode arrangement of the electric shock protection device, Figure 3b is an exploded perspective view of Figure 3a,

4 is a cross-sectional view of an electric shock protection device according to an embodiment of the present invention;

5a to 5e is a conceptual diagram showing an application example of the 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 and (b) electrostatic discharge (ESD), and (c) communication signals of an electric shock protection device according to an embodiment of the present invention;

7 is a cross-sectional SEM image of the 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 so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements 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 that protects against leakage current and static electricity flowing into the interior, and a signal transmission function that suppresses and passes the attenuation of the data signal flowing into the interior through one device. In consideration of such a complex function, the electric shock protection device may be preferably disposed between a conductor such as an antenna and an internal circuit unit.

In addition, the above-described electric shock protection function and signal transmission function can be achieved through an electric shock protection device as shown in FIG. 1A or an electric shock protection device as shown in FIG. 3A.

First, the electric shock protection device 100 shown in FIG. 1A is electrically connected in parallel to the electric shock protection unit that protects against leakage current and static electricity flowing in and to prevent attenuation of the data signal introduced into. It may be implemented with a signal transmission unit. In detail, as illustrated 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 only on one side of the upper or lower part of the electric shock protection unit, and the electric shock protection is implemented if the signal transmission unit and the electric shock protection unit are electrically connected, for example, electrically connected in parallel. The signal transmission unit may be disposed on the side of the unit.

First, the electric shock protection unit 110 may be implemented through the first

internal electrodes

111a and 112a and the

first bodies

111, 112 and 113 which are spaced apart from each other in the horizontal or vertical direction. In addition, a space between the spaced apart first pair of

internal electrodes

111a and 112a may be further provided with a discharge material filling a portion or all of the spaces. It may be a presser.

The positional relationship between the pair of first

internal electrodes

111a and 112a and the pores 116 provided in the electric shock protection unit 110 will be described with reference to FIGS. 1B and 2, as shown in FIG. 1B. The

electrodes

111a and 112a are arranged to overlap at least a part of each electrode surface in the vertical direction in the cross section of the electric shock protection device, and the pore forming member 115 including the voids 116 therein is disposed in the overlapping spaces. Can be. Alternatively, as illustrated in FIG. 2, the electric shock protection unit 110 ′ of the electric shock protection device includes a pair of first internal electrodes 111 a ′ and 112 a ′ spaced apart in a horizontal direction and the first internal electrodes 111 ′ a, which are spaced apart from each other. The pores formed between the 112'a) may be disposed, and the pores may be formed to have a height greater than the thickness of the first internal electrodes 111'a and 112'a. 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 pores are not limited to FIGS. 1B and 2, and the first internal electrodes may be provided in pairs. Two or more voids may also be provided. In addition, as shown in FIG. 1B, the pore forming member 115 may remain in the body after being sintered or may be vaporized at a temperature below the sintering temperature of the body, and only the voids remain in the final body, and the pore forming member may be lost. .

In addition, the discharge material 117 may be filled in only a part of the pores, unlike in FIG. In this case, the discharge material may include a case in which only a part of the gap is filled by coating an inner surface of the body surrounding the outside of the gap, and the present invention is not particularly limited to a specific shape in which the discharge material fills the gap. Do not. However, it is preferable to partially fill each of the first internal electrodes spaced apart so that the discharge material is directly connected to each other. The discharge material 117 may be made of a non-conductive material including at least one kind of metal particles, and may be made of a semiconductor material including SiC or silicon-based components. In addition, the discharge material is made by mixing at least one material selected from SiC, carbon, graphite, and ZnO with at least one material selected from Ag, Pd, Pt, Au, Cu, Ni, W, and Mo at a predetermined ratio. It may be. For example, when the first

internal electrodes

111a, 111a ', 112a, and 112a' include an Ag component, the discharge material may include a SiC-ZnO-based component. The silicon carbide (SiC) component has excellent thermal stability, excellent stability in an oxidizing atmosphere, constant conductivity and thermal conductivity, and low dielectric constant. In addition, the ZnO component has excellent nonlinear resistance characteristics and discharge characteristics. At this time, the SiC and ZnO are conductive when used separately, but when mixed with each other and baking is performed, ZnO is bonded to the surface of the SiC particles to form an insulating layer. Such an insulating layer is because SiC completely reacts to form a SiC-ZnO reaction layer on the surface of the SiC particles. Accordingly, the insulating layer has an advantage of blocking the Ag pass to provide higher insulation to the discharged material and improving resistance to static electricity to more effectively eliminate the DC short phenomenon of the electric shock protection unit 110. . Here, an example of the discharge material is described as including SiC-ZnO-based components, but the present invention is not limited thereto. The discharge material is a material constituting the first

internal electrodes

111a, 111a ', 112a, and 112a'. Non-conductive materials including semiconducting materials or metal particles can be used.

Meanwhile, 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' correspond to breakdown voltages (or trigger voltages) Vbr of the electric shock protection units 110 and 110 '. The distance between the pair of first internal electrodes 111a / 112a and 111a '/ 112a' may be 10 to 100 μm. For example, an interval between the first

internal electrodes

111a and 112a may be 25 μm. Here, when the interval between the pair of first internal electrodes 111a / 112a and 111a '/ 112a' is less than 10 μm, resistance to static electricity may be weak. In addition, when the interval between the pair of first internal electrodes 111a / 112a and 111a '/ 112a' exceeds 100 µm, the discharge start voltage (operating voltage) increases, and thus smooth discharge is not performed due to static electricity. The protection against can be lost.

In addition, the thickness of the first

internal electrodes

111a, 111a ′, 112a, 112a ′ may be 2 μm to 10 μm. If the thickness of the first

internal electrodes

111a, 111a ′, 112a, 112a ′ is less than 2 μm, it may be difficult to serve as an internal electrode. In addition, if the thickness of the first

internal electrodes

111a, 111a ', 112a, and 112a' exceeds 10 µm, the distance between the internal electrodes is limited, and the volume of the electric shock protection device 100 increases, which adversely affects miniaturization. Can be crazy

In addition, 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 body has a rectangular cross section, and the width is 50 to 65% of the length of the long side. Can be. For example, in the electric shock protection device having a length of 0.02 inch and a length of 0.01 inch, the length of the first internal electrode may be 0.016 inch and the width of 0.006 inch.

In addition, the first

internal electrodes

111a, 111a ', 112a, and 112a' may include one or more components of Ag, Au, Pt, Pd, Ni, and Cu, and may be Ag / Pd. .

On the other hand, by such a configuration and arrangement, for example, the discharge start voltage (operation voltage) of the electric shock protection unit 110, 110 'by static electricity may be 1 ~ 15 kW. Here, when the discharge start voltage of the electric shock protection unit 110, 110 'is 1 kV or less, it is difficult to secure resistance to static electricity.

In addition, the above-described electric shock protection unit (110,110 ') is a breakdown voltage (Vbr) of the electric shock protection unit in order to pass the leakage current and high-pressure static electricity than the rated voltage (Vin) of the external power source for driving the electronic device having the same Can be large. In this case, the rated voltage may be any one of 240V, 110V, 220V, 120V, 110V, and 100V.

The

first bodies

111, 112, and 113 are portions directly contacting the first

internal electrodes

111 a and 112 a in the electric shock protection unit 110, and the first bodies 110 may include a plurality of sheet layers 111, 112, and 113. These may be sequentially stacked, and the first

internal electrodes

111a and 112a provided on one surface thereof may be disposed to face each other, and may be integrally formed by sintering after pressing. Alternatively, the first body may be formed by sintering the first

internal electrodes

111a and 112a so as to have an electrode structure of the electric shock protection unit 110 in one sheet.

On the other hand, the first body (111, 112, 113) of the electric shock protection unit is laminated with each of the second body (121, 122, 123, 124, 125, 126, 127, 128) of the signal transmission unit (120a, 120b) to be described later before sintering can be integrally sintered to form a body, but is not limited thereto. It is not. Description of the first body (111, 112, 113) will be described in detail with the second body after the description of the signal transmission unit to be described later.

The

signal transmission units

120a and 120b may not cause RF signal interference as the

signal transmission units

120a and 120b pass a communication signal without attenuation in a communication band introduced from a conductor such as an antenna.

The

signal transmission units

120a and 120b allow the static electricity to pass through without being insulated and destroyed when static electricity flows from a conductor, and may block leakage current, especially DC components, of external power flowing from the ground of the circuit unit, and thus protect against electric shock. By performing the function at the same time as the above-described electric shock protection device it is possible to express a more excellent electric shock protection function. In order for the

signal transmission units

120a and 120b to simultaneously perform an electric shock protection function, the insulation breakdown voltage Vcp of the

signal transmission units

120a and 120b may be greater than the rated voltage Vbr of the external power supply of the electronic device. have. At this time. The dielectric breakdown voltage Vcp of the

signal transmission units

120a and 120b is formed at both ends of the second

internal electrodes

121a and 122a, 123a, 124a, 125a, 126a, 127a and 128a provided in the signal transmission unit.

The second internal electrodes may be provided in various shapes and patterns, and any 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.

In addition, the second

internal electrodes

121a, 122a, 123a, 124a, 125a, 126a, 127a, and 128a constituting the

signal transmission units

120a and 120b may be disposed between a pair of second internal electrodes facing each other. For example, the separation interval between the adjacent inner facing electrodes (eg, 121a / 122a) among the second

internal electrodes

121a, 122a, 123a, and 124a provided in the first signal transmission unit 120a is 15 to 100 μm. It may be provided to have a range of, preferably may be 20 ~ 100㎛. If the distance between the adjacent second internal electrodes is less than 15 µm, it is difficult to secure a sufficient capacitance to pass the communication signal of the wireless communication band without attenuation, and there is a problem that the dielectric breakdown may be caused by high voltage static electricity. . In addition, when the spacing between adjacent second internal electrodes exceeds 100 μm, it is difficult to realize high capacitance.

In this case, the thickness of each of the second internal electrodes constituting the

signal transmission units

120a and 120b may be provided to have a size of 1/10 to 1/2 greater than an interval between the pair of second internal electrodes facing each other. Can be. For example, when the interval between the pair of second

internal electrodes

121a and 122a facing each other is 20 μm, the thickness of the second

internal electrodes

121a and 122a may be provided to have a range of 2 to 10 μm. Can be. Here, when the thickness of the second internal electrode is 2 μm or less, the second internal electrode may not function as an electrode, and when the thickness of the second internal electrode exceeds 10 μm, the thickness of the second internal electrode may be thickened to form a signal transmission part at a predetermined size. The distance between the two is limited, and the number of unit units that can be provided in the second body of the limited area is limited when a pair of second internal electrodes overlapped with each other is used as a unit unit. There is a difficult problem.

On the other hand, the outer end 132 adjacent to the free end of the second inner electrode 124a in FIG. 1C is the shortest distance between the free end and the outer electrode of the second inner electrode that is not connected to the external electrode, for example The shortest distance between the liver is provided to have a distance of at least 15㎛, may be provided to have a distance in the range of 15 ~ 100㎛.

In addition, in the second internal electrodes constituting the

signal transmission units

120a and 120b, one second internal electrode 121a is not formed on one sheet layer 121 as shown in FIG. It may include a plurality of second internal electrodes (not shown) disposed in a line spaced apart from the sheet layer (not shown), a plurality of sheet layers containing a plurality of second internal electrodes on one surface, each sheet layer The plurality of second internal electrodes formed in the plurality may be disposed to face each other to have an overlapping area of a predetermined area or more.

In addition, the second internal electrode may be the same as or different from the material of the first internal electrode.

Meanwhile, the distance between the electric shock protection unit 110 and the

signal transmission units

120a and 120b may be greater than the distance between the pair of first

internal electrodes

111a and 112a. That is, it is preferable to secure 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, the distance between the signal transmission unit (120a, 120b) and the electric shock protection unit 110 is preferably greater than two times greater than the interval between the pair of first internal electrodes (111a, 112a). For example, when the interval between the pair of first

internal electrodes

111a and 112a is 10 μm, the distance between the

signal transmission units

120a and 120b and the electric shock protection unit 110 may be 20 μm or more. have.

Here, the distance between the signal transmission unit and the electric shock protection unit is described with reference to FIG. 1C. The distance between the signal transmission unit and the electric shock protection unit is located closest to the electric shock protection unit 110 among the plurality of second internal electrodes included in the signal transmission unit 120a. The distance between the second internal electrode 121a and the first internal electrode 111a closest to the second internal electrode 121a among the first internal electrodes provided in the electric shock protection unit 110.

However, when the electric shock protection unit 110 and the

signal transmission units

120a and 120b are disposed adjacent to each other, the ESD introduced from the outside does not flow only through the electric shock protection unit 110 but the

signal transmission units

120a and 120b. It may be introduced into the can cause the breakdown of the signal transmission unit (120a, 120b). Accordingly, the distance between the

signal transmission parts

120a and 120b and the electric shock protection part 110 is provided to have a distance of at least 20 μm, more preferably 30 μm or more, even more preferably 40 to 100 μm. It may be provided to have a distance of the range. If the distance between the adjacent first internal electrode and the second internal electrode is less than 20 μm, instantaneous high voltage static electricity may flow into the signal transmission unit and be destroyed. In particular, when used in a circuit where frequent static electricity passes, the signal transmission may occur. Negative insulation breakdown has a problem that can be further increased.

Meanwhile, the

signal transmitting parts

120a and 120b are sequentially stacked with 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 on one surface thereof. The plurality of electrodes provided on each surface may be disposed to face each other, and then may be integrally formed by forming a second body through a sintering or curing process. Alternatively, a second body may be formed by sintering or hardening a second internal electrode spaced apart from each other so as to have the electrode structures of the

signal transmitting parts

120a and 120b in one sheet.

Hereinafter, a body including the

first body

111, 112, 113 and the

second body

121, 122, 123, 124, 125, 126, 127, 128 will be described.

In order for the electric shock protection device to be provided in a light and small portable electronic device, it is required to miniaturize the electric shock protection device itself. However, the capacitance of the electric shock protection device depends on the volume of the body. That is, by reducing the size of both the body and the inside of the body while the same internal electrode arrangement provided in the body can be implemented an electric shock protection device reduced to the capacitance. This reduces the area of the electrode or the area where the electrode can be formed at the same time, even when the capacitance (the height) of the electric shock protection device is reduced and the capacitance between the internal electrodes can be narrowed and increased. Accordingly, there is an absolute structural limitation that the electric shock protection device capacitance before miniaturization is maintained even after miniaturization, which cannot be solved by a design change of the electrode structure. In addition, the decrease in the thickness (height) due to the miniaturization of the electric shock protection device reduces the volume of voids provided in the body, the vertical distance between the first internal electrodes of the electric shock protection part, and the vertical separation between the second internal electrodes of the signal transmission part. As the distance is reduced, the body is insulated because the breakdown voltage (Vbr) of the electric shock protection part and the breakdown voltage (Vcp) of the signal transmission part are not realized to withstand or pass the instantaneous high voltage static electricity flowing from the outside. It can be destroyed and permanently lose its ability to protect the circuit from further leakage current interruption / static.

This may be implemented by stacking and sintering a plurality of sheets having internal electrodes on one surface as shown in FIG. 1B. In this case, shorter separation distances between internal electrodes in the vertical direction mean thinner sheets. However, the thinner the sheet, the higher the possibility of cracks, pores, and the like, which further lowers the mechanical strength of the body, and has a problem of making it difficult to withstand or pass when high-pressure static electricity is introduced. In addition, the lower capacitance has a problem of significantly reducing the reception sensitivity of the communication signal flowing into the electric shock protection device, for example, the communication signal in the mobile wireless communication frequency band.

When the electric shock protection device is miniaturized to prevent this, if the thickness of the sheet on which the internal electrodes are formed is not changed, the number of sheets and the number of internal electrodes that can be stacked inside the body becomes smaller at the same time. Even if the defects caused by the voids are prevented, the electrostatic capacity of the electric shock protection device may be reduced as a result, and even in this case, it may not be possible to block the high voltage static electricity and leakage current flowing from the outside, and at the same time prevent the attenuation of the received signal of the communication signal. none. In view of the problem of miniaturizing such an electric shock protection device, it may be very undesirable to combine the signal transmission part and the electric shock protection part into a body having a single limited volume.

However, the inventors of the present invention continually researched to solve this problem. However, when the body is formed of a barium titanate-based component and a glassy component as compared with before and after the absolute size reduction of the electric shock protection device, the device has a small size. Excellent electric shock protection function and communication signal transmission function can be performed simultaneously.

Thus, the body provided in the electric shock protection device according to the present invention is implemented in a size that is easy to be mounted inside the portable device of the light and thin element while blocking the leakage current, and can pass the static electricity of a high voltage of 8 kV or more, The volume is 0.025 ~ 0.060 감 including barium titanate-based components and glassy components to allow incoming communication signals to pass through without attenuation.

If the volume of the bodies (111, 112, 113, 121, 122, 123, 124, 125, 126, 127, 128) is less than 0.025㎣, the area of the body in which the electrodes can be printed is reduced to achieve a certain level of capacitance, thereby controlling the capacitance through the arrangement and structure of the electrodes provided therein. There is a problem that the design change can be difficult, the number of internal electrodes provided, the volume of the pores can also be reduced, the breakdown of the body can easily occur. In addition, if the volume of the body exceeds 0.060㎣ it may be difficult to apply to light and thin mobile devices. In addition, the electric shock protection device implemented beyond a certain size has a difficulty in changing the overall PCB design for mounting the electric shock protection device when mounted on a substrate, and pick-up errors according to the size or more in the mounting process on the board. up error) may cause problems in the manufacturing process of the product using the electric shock protection device. Accordingly, the electric shock protection device may be, for example, a standardized device having a width of 0.02 inches, a length of 0.01 inches, and a height of 0.01 inches.

In addition, the body is implemented to include a barium titanate-based component and a glassy component.

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

In addition, the glassy component may include oxides of one or more metals and nonmetals selected from the group consisting of Al, B, Si, Ca, and Mg, preferably may include oxides of Al and Si, in particular dielectric constant The use of more than 25, more preferably more than 35 can increase the density of the body to further secure the mechanical strength of the body, the defect of the body is reduced and there is less risk of insulation breakdown.

In addition, the body (111, 112, 113, 121, 122, 123, 124, 125, 126, 127, 128) according to an embodiment of the present invention may include 50 to 80 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component in order to express the desired physical properties more remarkably. In addition, more preferably, the barium titanate-based component may be included in an amount of 50 to 70 parts by weight. If less than 50 parts by weight of the barium titanate-based component is contained with respect to 100 parts by weight of the glass component, the electric shock protection function and the suppression of the attenuation of the communication signal can be performed smoothly because it is insufficient to compensate for the reduced capacitance. There is a problem that can be lost or breakdown of this function. In addition, when the barium titanate-based component is included in an amount of more than 80 parts by weight, the compensation of the capacitance reduced according to the miniaturization of the body may be sufficient, but the density of the body may be remarkably lowered, thereby reducing the mechanical strength, Therefore, since the pores may be included in the body, there is a problem that the resulting dielectric breakdown of the body may be accelerated. In addition, as the sintering temperature of the body increases, the internal electrode having a relatively low sintering temperature and good conductivity may be difficult to use as a material, for example, a metal such as Ag as the internal electrode.

In addition, the body implemented through this may have a dielectric constant of 900 to 1500, the density may be 4.5 to 5.8 g / ㎣. The high dielectric constant of the body makes it suitable for miniaturized devices to pass instantaneous high-voltage static electricity or to block leakage currents, and to receive incoming communication signals, especially those in the mobile wireless communication frequency band (700 MHz to 2.6 GHz). It may be more suitable for passing without attenuation. If the dielectric constant of the body is less than 900 in consideration of the limited volume of the body implemented in 0.025 ~ 0.060 수 it may be difficult to express the electric shock protection function and communication signal attenuation suppression function of the present invention at the same time, the insulation breakdown of the body There is a problem that the functions may be permanently lost. In addition, when the dielectric constant exceeds 1500, the internal electrode should be designed such that the overlapping electrode area of the internal electrodes (first internal electrode and / or second internal electrode) which are spaced up and down in proportion to the volume is small. However, the design of the internal electrode may reduce the corresponding area of the body having the insulation characteristics when the high-voltage static electricity flows in a moment, so that there is a problem that the electric field is concentrated on a specific portion and the possibility of insulation breakdown increases.

In addition, if the density of the body is less than 4.5g / ㎣ the mechanical strength of the body is very weak, the body may contain pores, etc., the pores may cause cracks of the body, so that the breakdown more easily There is a problem that can cause. In addition, when the density of the body exceeds 5.8 g / 시켜야 it 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 limiting the material selection of the internal electrode. In particular, the damage problem of the internal electrode may be further exacerbated by increasing the sintering temperature and / or prolonging the sintering time in order to compensate for the lowering density due to the increased content of the barium titanate-based component in the body.

Meanwhile, the

bodies

111, 112, 113, 121, 122, 123, 124, 125, 126, 127, and 128 may be formed by stacking and sintering a plurality of sheets including barium titanate-based components and glassy components, as shown in FIG. 1B. The sheet formed on one surface may have a minimum thickness of 20 μm or more. As described above, when a sheet having a very thin thickness is provided, cracks may easily occur during the stacking process of the sheet, and when a defect such as pores is included therein, a defect in the sheet having a thin thickness is the same as that inside the sheet having a thicker thickness. As the insulation can be more easily destroyed in preparation for a defect, it is preferable that the sheet having the internal electrode formed on one surface satisfies a minimum thickness of 20 μm or more. On the other hand, considering that the body volume is 0.025 to 0.060 mm 3, the number of sheets that can be stacked at a limited thickness of the body is limited, so that increasing the thickness of the sheet to a certain level is more than an electric shock protection function and / or data. This may result in a decrease in signal attenuation suppression. Accordingly, the thickness of one sheet provided on one surface of the internal electrode may be 20 μm or more, more preferably 28 μm or more, and more preferably 28 to 100 μm.

In addition, in consideration of the volume and the active area of the internal electrode, the body has a thickness of 0.2 to 0.4 mm. Accordingly, the sheet having at least one inner electrode is stacked in 4 to 16 sheets. It is preferable to form the body after sintering. If the thickness of the body is less than 0.2 mm, it is difficult to realize a desired level of capacitance due to a decrease in the number of sheets stacked therein and the number of internal electrodes that can be provided therein. Even if the capacitance is implemented to the desired level, there is a problem that the thickness of the sheet becomes thin and can be easily broken. In addition, if the thickness exceeds 0.4mm, the formable area of the internal electrodes is increased, and the gap between the internal electrodes is also reduced, which may be suitable for realizing a fixed capacitance. There is a problem that the insulation is broken and the function of the electric shock protection device cannot be continuously expressed.

On the other hand, according to an embodiment of the present invention, it is possible to implement an electric shock protection device as shown in Figure 3a and 3b. The electric shock protection device 200 illustrated in FIGS. 3A and 3B includes

body

211, 212 and 213 and at least one pair of

internal electrodes

211a and 212a provided in the

body

211, 212 and 213. The

external electrodes

133 and 134 may be further included on the outer surfaces of the

bodies

211, 212, and 213 to be electrically connected to the 212a. In this case, the

internal electrodes

211a and 212a may be arranged such that predetermined electrode areas overlap each other in the up and down directions. In addition, a gap or a discharge material filling at least a portion of the gap may be further provided in the spaced apart space between the pair of overlapping

internal electrodes

211a and 212a. At this time, the overlapped electrode area, the number of internal electrodes provided, the distance between them, the number of voids, etc. may be appropriately selected to have a breakdown voltage (Vbr) larger than the rated voltage of the external power source. Can be. As illustrated in FIG. 4, the electric shock protection device 200 ′ may include three pairs of internal electrodes 214a / 215a, 216a / 217a, and 218a / 219a, and space in spaces between the pair of internal electrodes. 215 and has a breakdown voltage greater than the rated voltage of the external power source by changing the overlapping area, the separation distance, and the volume of the gap between the electrodes.

However, as described above, in a limited volume of 0.15 to 0.40 ㎣ of the body, it is not easy to implement a breakdown voltage (Vbr) larger than the rated voltage of an external power source, or it is difficult to suppress attenuation of an incoming data signal even if a sufficient breakdown voltage is implemented. The

body

211, 212, 213 may include a barium titanate-based component and a glassy component. The

body

211, 212, and 213 may include a barium titanate-based component and a glassy component. An attenuation suppression function that can significantly prevent attenuation of the data signal passing through can be simultaneously expressed.

Meanwhile, descriptions of the components of the

bodies

211, 212, and 213, their contents, the permittivity of the bodies, the density, the minimum thickness of the sheets provided, the number of sheets, and the like are omitted as described above.

On the other hand, according to another embodiment of the present invention, the volume is 0.15 ~ 0.40㎣, a body comprising a barium titanate-based component and a glass component; And an internal electrode disposed inside the body, wherein an electric shock protection function that protects against leakage current and static electricity flowing into the body and a signal transmission function that suppresses and passes the attenuation of the data signal flowing into the electric shock are combined. It includes a protection element.

The description of the same parts as the above-described embodiment will be omitted and the description will be given mainly on the differences.

The length of the first

internal electrodes

111a, 111a ', 112a, and 112a' that may be provided in the electric shock protection part may be 70 to 85% of the length of the long side when the body has a rectangular cross section, and the width of the first

internal electrodes

111a, 111a ', 112a, 112a' may be provided. It can be 50-65% of the length. For example, in the electric shock protection device having a length of 0.04 inch and a length of 0.02 inch, the length of the first internal electrode may be 0.032 inch and the width of 0.012 inch.

The body is implemented in such a size that it is easy to be mounted inside a mobile device of a light and small size, and can block leakage current, pass instantaneous high voltage static electricity of 8 kV or more, and pass an incoming communication signal without attenuation. The volume is 0.15 ~ 0.40 mm by including a barium titanate-based component and a glassy component. If the volume of the body is less than 0.15㎣, the design change to control the capacitance through the arrangement, structure, etc. of the electrode provided therein is reduced by reducing the area in the body in which the electrode can be printed to achieve a certain level of capacitance. There is a problem that may be difficult, the number of internal electrodes provided, the volume of the pores can also be reduced, the breakdown of the body can easily occur. In addition, if the volume of the body exceeds 0.40㎣ it may be difficult to apply to light and thin mobile devices. In addition, the electric shock protection device implemented beyond a certain size has a difficulty in changing the overall PCB design for mounting the electric shock protection device when mounted on a substrate, and pick-up errors according to the size or more in the mounting process on the board. up error) may cause problems in the manufacturing process of the product using the electric shock protection device. Accordingly, the electric shock protection device may be, for example, a standardized device having a width of 0.04 inches, a length of 0.02 inches, and a height of 0.02 inches.

In addition, the body may contain 30 to 50 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component in order to express the desired physical properties more remarkably. In addition, more preferably, the barium titanate-based component may be included in an amount of 30 to 43 parts by weight. If less than 30 parts by weight of the barium titanate-based component is contained with respect to 100 parts by weight of the glass component, the electric shock protection function and the suppression of the attenuation of the communication signal can be performed smoothly because it is insufficient to compensate for the reduced capacitance. There is a problem that can be lost or breakdown of this function. In addition, when the barium titanate-based component is included in an amount of more than 50 parts by weight, the compensation of the capacitance reduced according to the miniaturization of the body may be sufficient, but the density of the body may be remarkably lowered, thereby reducing the mechanical strength, Therefore, since the pores may be included in the body, there is a problem that the resulting dielectric breakdown of the body may be accelerated. In addition, as the sintering temperature of the body increases, the internal electrode having a relatively low sintering temperature and good conductivity may be difficult to use as a material, for example, a metal such as Ag as the internal electrode.

In addition, the body implemented through this may have a dielectric constant of 650 ~ 950, the density may be 4.5 ~ 5.8 g / ㎣. The high dielectric constant of the body makes it suitable for miniaturized devices to pass instantaneous high-voltage static electricity or to block leakage currents, and to receive incoming communication signals, especially those in the mobile wireless communication frequency band (700 MHz to 2.6 GHz). It may be more suitable for passing without attenuation. If the dielectric constant of the body is less than 650 in consideration of the limited volume of the body implemented in 0.15 ~ 0.40 ㎣ it may be difficult to express the electric shock protection function and communication signal attenuation suppression function of the present invention at the same time, the insulation breakdown of the body as described above There is a problem that the functions may be permanently lost. In addition, when the dielectric constant exceeds 950, 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 apart from each other in proportion to the volume is small. However, the design of the internal electrode may reduce the corresponding area of the body having the insulation characteristics when the high-voltage static electricity flows in a moment, so that there is a problem that the electric field is concentrated on a specific portion and the possibility of insulation breakdown increases. In addition, if the density of the body is less than 4.5g / ㎣ the mechanical strength of the body is very weak, the body may contain pores, etc., the pores may cause cracks of the body, so that the breakdown more easily There is a problem that can cause. In addition, when the density of the body exceeds 5.8 g / 시켜야 it 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 limiting the material selection of the internal electrode. In particular, the damage problem of the internal electrode may be further exacerbated by increasing the sintering temperature and / or prolonging the sintering time in order to compensate for the lowering density due to the increased content of the barium titanate-based component in the body. Meanwhile, the

bodies

111, 112, 113, 121, 122, 123, 124, 125, 126, 127, and 128 may be formed by stacking and sintering a plurality of sheets including barium titanate-based components and glassy components, as shown in FIG. 1B. The sheet formed on one surface may have a minimum thickness of 20 μm or more. As described above, when a very thin sheet is provided, cracks may easily occur in the stacking process of the sheets. In addition, when the defects such as pores are included in the inside, the thinner sheet defects may be more easily insulated and destroyed in preparation for the same defects in the thicker sheets. The sheet preferably has a minimum thickness of 20 µm or more. On the other hand, considering that the body volume is 0.15 to 0.40 mm 3, the number of sheets that can be stacked at a limited thickness of the body is limited, so that increasing the thickness of the sheet to a certain level is more than an electric shock protection function and / or data. This may result in a decrease in signal attenuation suppression. Accordingly, the thickness of one sheet provided on one surface of the internal electrode may be 20 μm or more, more preferably 28 μm or more, and more preferably 28 to 100 μm.

In addition, considering the volume and the active area of the internal electrode, the body has a thickness of 0.5 to 0.85 mm, and thus, the sheet having at least one inner electrode is stacked in 13 to 30 sheets. It is preferable to form the body after sintering.

If the thickness exceeds 0.85 mm in consideration of the limited volume, there is a problem that the formable area of the internal electrode is reduced, so that the desired level of capacitance, electric shock protection and data signal attenuation suppression cannot be simultaneously achieved. have. In addition, when the thickness is less than 0.5 mm in consideration of the limited volume, the formable area of the internal electrodes is increased, and the gap between the internal electrodes is also reduced, which may be suitable for realizing a fixed capacitance. There is a problem that it is not easy to break the insulation and express the function of the electric shock protection device.

On the other hand, according to an embodiment of the present invention, it is possible to implement an electric shock protection device as shown in Figs. 3a and 3b. The electric shock protection device 200 illustrated in FIGS. 3A and 3B includes

body

211, 212 and 213 and at least one pair of

internal electrodes

211a and 212a provided in the

body

211, 212 and 213. The

external electrodes

133 and 134 may be further included on the outer surfaces of the

bodies

211, 212, and 213 to be electrically connected to the 212a. In this case, the

internal electrodes

body

Meanwhile, descriptions of the components of the

bodies

Alternatively, according to another embodiment of the present invention, a body having a volume of 0.7 to 1.0 mm 3 and containing a barium titanate-based component and a glassy component; And an internal electrode disposed inside the body, wherein an electric shock protection function that protects against leakage current and static electricity flowing into the body and a signal transmission function that suppresses and passes the attenuation of the data signal flowing into the electric shock are combined. Implement a protection device.

The length of the first

internal electrodes

111a, 111a ', 112a, and 112a' provided in the electric shock protection part may be 70 to 85% of the length of the long side when the cross section of the body is rectangular, and the width of the long side length It can be 50 to 65%. For example, in the electric shock protection device having a length of 0.06 inches and a length of 0.03 inches, the length of the first internal electrode may be 0.048 inch and the width of 0.018 inch.

The body is implemented in such a size that it is easy to be mounted inside a mobile device of a light and small size, to block leakage current, to pass the instantaneous high voltage static electricity of 8kV or more, and to pass the incoming communication signal without attenuation. It includes a barium titanate-based component and a glassy component, and has a volume of 0.7 to 1 mm 3. If the volume of the bodies (111, 112, 113, 121, 122, 123, 124, 125, 126, 127, 128) is less than 0.7 mm, the capacitance within the body to which the electrodes can be printed is reduced to achieve a certain level of capacitance, thereby controlling the capacitance through the arrangement and structure of the electrodes provided therein. There is a problem that the design change can be difficult, the number of internal electrodes provided, the volume of the pores can also be reduced, the breakdown of the body can easily occur. In addition, if the volume of the body exceeds 1 ㎣ it may be difficult to apply to the light and thin mobile devices. In addition, the electric shock protection device implemented beyond a certain size has a difficulty in changing the overall PCB design for mounting the electric shock protection device when mounted on a substrate, and pick-up errors according to the size or more in the mounting process on the board. up error) may cause problems in the manufacturing process of the product using the electric shock protection device. Accordingly, the electric shock protection device may be, for example, a standardized device having a width of 0.06 inches, a length of 0.03 inches, and a height of 0.03 inches.

In addition, the body (111, 112, 113, 121, 122, 123, 124, 125, 126, 127, 128) may contain 10 to 30 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component to express the desired physical properties more remarkably. In addition, more preferably, the barium titanate-based component may be included in an amount of 15 to 25 parts by weight. If less than 10 parts by weight of the barium titanate-based component is contained with respect to 100 parts by weight of the glass component, the electric shock protection function and the suppression of the attenuation of the communication signal can be smoothly performed because it is insufficient to compensate for the reduced capacitance. There is a problem that can be lost or breakdown of this function. In addition, when the barium titanate-based component is included in an amount of more than 30 parts by weight, the compensation of the capacitance reduced according to the miniaturization of the body may be sufficient, but the density of the body may be remarkably lowered, thereby reducing the mechanical strength, Therefore, since the pores may be included in the body, there is a problem that the resulting dielectric breakdown of the body may be accelerated. In addition, as the sintering temperature of the body increases, the internal electrode having a relatively low sintering temperature and good conductivity may be difficult to use as a material, for example, a metal such as Ag as the internal electrode.

In addition, the body implemented through this may have a dielectric constant of 180 to 680, the density may be 4.5 to 5.8 g / ㎣. The high dielectric constant of the body makes it suitable for miniaturized devices to pass instantaneous high-voltage static electricity or to block leakage currents, and to receive incoming communication signals, especially those in the mobile wireless communication frequency band (700 MHz to 2.6 GHz). It may be more suitable for passing without attenuation. If the dielectric constant of the body is less than 180 in consideration of the limited volume of the body implemented in 0.70 ~ 1.0 ㎣ it may be difficult to express the electric shock protection function and the communication signal attenuation suppression function of the present invention at the same time, the insulation breakdown of the body as described above There is a problem that the functions may be permanently lost. In addition, when the dielectric constant exceeds 680, the internal electrode should be designed such that the overlapping electrode area of the internal electrodes (first internal electrode and / or second internal electrode) which are spaced apart up and down in proportion to volume is small. However, the design of the internal electrode may reduce the corresponding area of the body having the insulation characteristics when the high-voltage static electricity flows in a moment, so that there is a problem that the electric field is concentrated on a specific portion and the possibility of insulation breakdown increases.

Meanwhile, the

bodies

111, 112, 113, 121, 122, 123, 124, 125, 126, 127, and 128 may be formed by stacking and sintering a plurality of sheets including barium titanate-based components and glassy components, as shown in FIG. 1B. The sheet formed on one surface may have a minimum thickness of 20 μm or more. As described above, when a sheet having a very thin thickness is provided, cracks may easily occur during the stacking process of the sheet, and when a defect such as pores is included therein, a defect in the sheet having a thin thickness is the same as that inside the sheet having a thicker thickness. As the insulation can be more easily destroyed in preparation for a defect, it is preferable that the sheet having the internal electrode formed on one surface satisfies a minimum thickness of 20 μm or more. On the other hand, considering that the body volume is 0.7 to 1.0 mm 3, the number of sheets that can be laminated at a limited thickness of the body is limited, so that increasing the thickness of the sheet to a certain level is more than an electric shock protection function and / or data. This may result in a decrease in signal attenuation suppression. Accordingly, the thickness of one sheet provided on one surface of the internal electrode is preferably implemented to 20 ~ 70 ㎛.

In addition, the body has a thickness of 0.5 to 1 mm, more preferably 0.5 to 0.8 mm, even more preferably 0.5 to 0.6 mm, considering the volume and the active area of the internal electrode. Accordingly, the sheet having at least one inner electrode is stacked in two to forty in consideration of the capacitance to be implemented to form an integrated body after sintering. If the thickness exceeds 1 mm in consideration of the limited volume, there is a problem that the formable area of the internal electrode is reduced, so that the desired level of capacitance, electric shock protection and data signal attenuation suppression cannot be simultaneously achieved. have. In addition, when the thickness is less than 0.5 mm in consideration of the limited volume, the formable area of the internal electrodes is increased, and the gap between the internal electrodes is also reduced, which may be suitable for realizing a fixed capacitance. There is a problem that it is not easy to break the insulation and express the function of the electric shock protection device.

body

211, 212 and 213 and at least one pair of

internal electrodes

211a and 212a provided in the

body

211, 212 and 213. The

external electrodes

133 and 134 may be further included on the outer surfaces of the

bodies

211, 212, and 213 to be electrically connected to the 212a. In this case, the

internal electrodes

211a and 212a. At this time, the overlapped electrode area, the number of internal electrodes provided, the distance between them, the number of voids, etc. may be appropriately selected to have a breakdown voltage (Vbr) larger than the rated voltage of the external power source. Can be. As shown in FIG. 4, the electric shock protection device 200 ′ may include three pairs of internal electrodes 214a / 215a, 216a / 217a, and 218a / 219a, and space in spaces between the pair of internal electrodes. 215 and has a breakdown voltage greater than the rated voltage of the external power source by changing the overlapping area, the separation distance, and the volume of the gap between the electrodes.

However, as described above, in the limited 0.7 ~ 1.0 ㎣ volume of the body, it is not easy to implement a breakdown voltage (Vbr) larger than the rated voltage of the external power source, or difficult to suppress the attenuation of the incoming data signal even if a sufficient breakdown voltage is implemented. The

body

Meanwhile, descriptions of the components of the

bodies

As described above, the electric shock protection device according to the embodiment of the present invention may have a capacitance of 4 to 100 pF, through which the electric shock protection function and the attenuation suppression function of a communication signal passing through the present invention may be simultaneously expressed. At the same time it can be expressed with better performance. If the capacitance is within 4pF, it may not be possible to express the electric shock protection performance against static electricity and the suppression of communication signal attenuation.

In addition, the electric

shock protection device

100, 100 ′, 200, 200 ′ may be disposed between the conductor 12, such as an external metal case, and the circuit unit 14 in the portable electronic device 10, as illustrated in FIG. 5A. .

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

Such a portable electronic device 10 is an outer housing made of conductive materials such as metal (aluminum, stainless steel, etc.), or carbon-fiber composite materials or other fiber-based composites, glass, ceramic, plastic, and combinations thereof. It may include.

In this case, 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, a metal case, and conductive ornaments for communication between the electronic device and an external device.

In particular, the metal case may be provided to partially 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 provided to the outside of the front or rear of the housing of the electronic device.

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

Such an electric shock prevention device 100 may be appropriately provided according to 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 a housing of the portable electronic device 10 so that the electric shock prevention devices 100 are individually connected. have.

That is, as shown in FIG. 5A, when the conductor 12 such as a metal case surrounding the side of the housing of the portable electronic device 10 has three parts, the

respective conductors

12a, 12b, 12c, and 12d are All of them are connected to the electric

shock prevention devices

100, 100 ′, 200, and 200 ′ to protect circuits inside the portable electronic device 10 from leakage current and static electricity.

In this case, when the plurality of

metal cases

12a, 12b, 12c, and 12d are provided, the electric shock prevention device 100 may be provided in various ways to meet the corresponding roles of the

metal cases

12a, 12b, 12c, and 12d. have.

For example, when the camera 100 is exposed to the outside of the housing of the portable electronic device 10 when the electric shock prevention device 100 is applied to the conductor 12d surrounding the camera, the electric shock prevention device (100,100) ', 200, 200' may be provided in the form of blocking leakage current and protecting the internal circuit from static electricity.

In addition, when the metal case 12b serves as a ground, the electric

shock prevention devices

100, 100 ′, 200 and 200 ′ are connected to the metal case 12 b to block leakage current and protect internal circuits from static electricity. It may be provided.

Meanwhile, as illustrated in FIG. 5B, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ may be disposed between the metal case 12 ′ and the circuit board 14 ′. In this case, since the electric

shock protection devices

100, 100 ′, 200, and 200 ′ are for passing static electricity without damage to themselves, the circuit board 14 ′ may include a separate protection device 16 for bypassing static electricity to ground. have. Here, the protection element 16 may be a suppressor or a varistor.

As shown in FIG. 5C, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ form a matching circuit (eg, R and L components) between the metal case 12 ′ and the front end module (FFM) 14a. Can be arranged through. The metal case 12 ′ may be an antenna. At this time, the electric shock protection device 100 is to pass a communication signal without attenuation and at the same time to pass the static electricity from the metal case 12 ', and to block the leakage current flowing from the ground through the matching circuit.

As shown in FIG. 5D, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ may be disposed between the metal case 12 ′ having the antenna and the IC 14c implementing the communication function through the corresponding antenna. Here, the communication function may be NFC communication. In this case, since the electric shock protection device 100 is for passing static electricity without damage to itself, an electric shock protection device 100 may include a separate protection device 16 for bypassing static electricity to the ground. Here, the protection element 16 may be a suppressor or a varistor.

As illustrated in FIG. 5E, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ may be disposed between the short pin 22 of the Planar Inverted F Antenna (PIFA) antenna 20 and the matching circuit. At this time, the electric shock protection device 100 is to pass a communication signal without attenuation and at the same time to pass the static electricity from the metal case 12 ', and to block the leakage current flowing from the ground through the matching circuit.

As illustrated in FIGS. 6A to 6C, the electric

shock protection devices

100, 100 ′, 200 and 200 ′ may have different functions according to leakage current by external power and static electricity flowing from the conductor 12.

That is, as shown in Figure 6a, when the leakage current of the external power supply to the conductor 12 through the circuit board, for example, the ground of the circuit portion 14, the electric shock protection device 100 is the breakdown voltage Since Vbr is larger than the overvoltage caused by the leakage current, it can be kept open. That is, since the breakdown voltage Vbr is greater than the rated voltage of the external power source of the portable electronic device, the electric

shock protection device

100, 100 ', 200, 200' is not electrically conductive and can be kept open so that it can be attached to a human body such as a metal case. The leakage current may be blocked from being transmitted to the conductor 12.

At this time, 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 because the leakage current has a relatively low frequency compared to the wireless communication band, By acting with large impedance, leakage current can be cut off.

As a result, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ may protect the user from electric shock by blocking leakage current from external power flowing from the ground of the circuit unit 14.

In addition, as shown in FIG. 6B, when static electricity flows from the outside through the conductor 12, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ function as an electrostatic protection device such as a suppressor. That is, since the operating voltage (discharge starting voltage) of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of static electricity, the electric

shock protection devices

100, 100 ', 200, and 200' can pass static electricity by instantaneous discharge. As a result, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ may have low electrical resistance when static electricity flows from the conductor 12, and thus may pass static electricity without breaking the insulation itself.

At this time, since the insulation breakdown voltage Vcp of the signal transmission unit provided in the electric

shock protection device

100, 100 ′, 200, 200 ′ is greater than the breakdown voltage Vbr of the electric

shock protection units

110, 110 ′ and 210, the static electricity is a signal transmission unit ( It does not flow into the 120a, 120b, it can pass only to the electric shock protection unit (110,110 ', 210).

Here, the circuit unit 14 may include a separate protection device for bypassing static electricity to ground. As a result, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ may pass the static electricity without being destroyed by the static electricity flowing from the conductor 12, thereby protecting the internal circuit of the rear stage.

In addition, as shown in FIG. 6C, when a communication signal is introduced through the conductor 12, the electric

shock protection device

100, 100 ′, 200, 200 ′ has a function of passing the incoming communication signal without attenuation or without attenuation. Do this. That is, the electric

shock protection devices

100, 100 ′, 200, and 200 ′ block the conductors 12 and the circuit part 14 by keeping the electric

shock protection parts

110, 110 ′ and 210 in an open state, but internal signal transmission parts 120 a and 120 b. ) Can pass incoming communication signals. As such, the

signal transmission units

120a and 120b of the electric shock protection device 100 may provide an inflow path of the communication signal.

Although the present invention will be described in more detail with reference to the following examples, the following examples are not intended to limit the scope of the present invention, which will be construed as to aid the understanding of the present invention.

In order to manufacture a plurality of molded sheets forming the body, a sheet forming composition was prepared, and specifically, a barium meta titanate component (MLC-302M, sinocera) and a glassy component (L40, FERRO) were prepared, respectively. 60 parts by weight of barium titanate was mixed with respect to 100 parts by weight of the glassy component. Then, the mixture was ball milled with water for 24 hours with a solvent to prepare a mixture of glass powder having an average particle diameter of 0.2 to 0.4 µm and barium titanate powder having an average particle diameter of 0.4 to 0.8 µm.

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

In consideration of the shrinkage rate according to the barium titanate-based component of Table 1, the sheet forming composition was prepared by a doctor blade method, and dried at 25 ° C. for 24 hours to prepare a sheet having a thickness of 30 μm. Thereafter, the prepared sheet was cut into a width of 0.55 mm and a length of 0.25 mm to make a plurality of sheets.

First, the internal electrode paste prepared in Preparation Example 1 below was coated on one surface of the sheet molding prepared to prepare the electric shock protection part so as to have a thickness of 3 μm, a length of 0.44 mm, and a width of 0.33 mm. At this time, the inner electrode paste was applied so that two inner electrodes were formed on one sheet molded sheet, and the side portions of the sheet electrodes faced each other with respect to the length direction of each inner electrode. The distance between the ends of the body was 110 µm and the separation distance between the electrodes was 40 µm.

Thereafter, in the space between the spaced internal electrodes, the pore forming portion, which is a conventional resin composition vaporized before reaching the sintering temperature of the sheet, was printed so that the volume of the voids was 5% of the body volume after sintering. Thereafter, another sheet molding which was not treated was laminated on the sheet molding to which the internal electrode paste was applied.

In addition, in order to prepare a signal transmission unit, a total of 10 sheet moldings on which one surface of the internal electrode paste of Preparation Example was applied were prepared. Specifically, the inner electrode paste was applied to each sheet molding in the shape of the inner electrode 121a of FIG. 1B to have a thickness of 3 μm, a length of 0.44 mm, and a width of 0.33 mm after sintering.

Thereafter, the stacked sheet moldings prepared for the electric shock protection unit were sandwiched therebetween, and five sheet moldings prepared for the signal transmission unit were stacked up and down. At this time, the arrangement of the internal electrodes were laminated so that the electrode arrangement of the cross section of the electric shock protection device after sintering was of the type shown in FIG. 7.

After sintering at 1200 ° C. under atmospheric pressure and air atmosphere in a sintering furnace, a sintered compact having a volume of 0.328㎣ was prepared.

Thereafter, the external electrode forming composition prepared in the following Preparation Example was applied to both ends of the inner electrodes protruding in parallel so as to be electrically connected in parallel, and then the electrode was baked at 700 ° C. for 120 minutes to obtain a final thickness of 20 μm. To prepare an electric shock protection device as shown in Table 1 with an external electrode.

* Preparation

First, the internal electrode paste prepared an Ag / Pd paste containing 80% by weight of a metal powder obtained by mixing Ag powder and Pd powder in an ethyl cellulose binder resin and an organic solvent in a 7: 3 weight ratio.

Next, as the external electrode paste, an 80 wt% Ag paste prepared by mixing Ag powder with an ethyl cellulose binder resin and an organic solvent was prepared.

It was prepared in the same manner as in Example 1, but by changing the composition of the sheet molding as shown in Table 1 to prepare an electric shock protection device as shown in Table 1.

Comparative Example 1

Prepared and carried out in the same manner as in Example 1, to change the sintering temperature of the body to 1000 ℃ to prepare an electric shock protection device as shown in Table 1.

Experimental Example

The physical properties of the electric shock protection devices manufactured in Examples and Comparative Examples are shown in Table 1 below.

1. Static electricity protection performance

In order to evaluate the ESD protection performance by external static electricity in portable electronic devices, an evaluation board (evaluation board) similar to a mobile phone structure was made to evaluate the ESD protection performance. At this time, the voltage is applied to the conductive line made of copper, which assumes the external metal case of the mobile phone as the source of ESD, and ESD is applied, while the other side is assumed to be the PCB ground IC, and the waveform is observed through the oscilloscope. We measured the leakage current flowing out of the circuit and measured the peak voltage of ESD that can pass the maximum.

2. Leakage Current Breaking Performance

To evaluate the internal leakage current blocking property, to increase the leakage current can be maximized, to increase the capacitance value of the Y-CAP element in the transformer used when converting the AC power of the charger to DC The charger was fabricated by arbitrarily changing the internal circuit so that a greater amount of leakage occurred from the power supply to the DC circuit.

In addition, the outer housing is a metal material, and an evaluation mobile phone equipped with an electric shock protection device was manufactured.

Thereafter, the mobile phone was connected to the charger connected to the 220V outlet, the COM terminal probe of the digital multimeter was connected to the outlet ground terminal, and the remaining probe was contacted with the metal housing of the cellular phone to measure the leakage current.

3. Communication signal attenuation suppression performance

In order to evaluate whether the electric shock protection device interferes with the RF reception sensitivity, the external housing is a metal material in the 3D anechoic chamber, and an evaluation mobile phone equipped with the electric shock protection device is placed in the frequency band where communication with an external device is made through an antenna. The RF signal was measured and compared to evaluate the TIP and TIS values through RF receivers to determine whether they meet the specified threshold for each frequency band. At this time, the measurement angle of DUT and antenna was changed by 0 ~ 360 degree, and when there is no abnormality in the data signal as a result of evaluation, it is indicated as × and ○ when signal attenuation occurred.

4. Evaluation of defects on cross section

The cross section of the manufactured electric shock protection device was checked by SEM photographs to determine whether pores, cracks, etc. occurred, and if there are cracks or pores, × is indicated if no defects are found.

As can be seen in Table 1 above,

In Comparative Example 1 prepared by stacking the same electrode structure and the same sheet molding, as the out of the volume range according to the present invention has a low density, it was impossible to measure the electrical properties due to the body strength problem, the termination was impossible. The cross section can also be expected to break even if 83 defects are detected and used as an electric shock protection device.

In addition, in the case of Example 2, the leakage current evaluation was superior to Example 1 as the barium titanate content was outside the preferred range according to the present invention, but the protection performance against ESD was reduced by 50% compared to Example 1, and the data signal As it is also attenuated, it can be seen that the protection against ESD and data signal reduction suppression function are not properly expressed.

In addition, in the case of Example 5, as the content of the barium titanate is outside the preferred range according to the present invention, it can be confirmed that the leakage current evaluation result is not very good beyond the allowable value (5 mA) in comparison with Example 1, ESD protection It can be seen that the performance is also reduced by 66.7% compared to the first embodiment, and all three functions cannot be performed as the data signal is attenuated.

In addition, in Example 3, it can be seen that, as the content of barium titanate is within the preferred range according to the present invention, both ESD protection, leakage current blocking, and data signal attenuation express excellent performance. However, in Example 4, the content of barium titanate was in the preferred range according to the present invention but outside the more preferred range, and thus the leakage current evaluation result was slightly exceeded, and the ESD protection performance was also reduced by 50% compared with Example 1. Can be.

Example 7

It was prepared in the same manner as in Example 1, the sheet forming composition was prepared by a doctor blade method (doctor blade) method, and dried for 24 hours at 25 ℃ to prepare a sheet having a thickness of 30㎛. Thereafter, the prepared sheet was cut to 2.317 mm in width and 1.158 mm in length to make a plurality of sheets.

First, the internal electrode paste prepared in Preparation Example 1 below was coated on one surface of the sheet molding prepared to prepare the electric shock protection part so as to have a thickness of 3 μm, a length of 1.85 mm, and a width of 1.39 mm. At this time, the inner electrode paste was applied so that two inner electrodes were formed on one sheet molded sheet, and the side portions of the sheet electrodes faced each other with respect to the length direction of each inner electrode. The distance between the ends of the body was 463 µm and the distance between the electrodes was 40 µm.

Thereafter, the pore forming portion, which is a conventional resin composition vaporized before reaching the sintering temperature of the sheet, was printed in the space between the spaced inner electrodes so that the volume of the voids was 5% of the body volume. Thereafter, another sheet molding which was not treated was laminated on the sheet molding to which the internal electrode paste was applied.

In addition, in order to prepare a signal transmission unit, a total of 32 sheet molded articles coated with one surface of the internal electrode paste of Preparation Example below were prepared. Specifically, the inner electrode paste was applied to each sheet molding in the shape of the inner electrode 121a of FIG. 1B to have a thickness of 3 μm, a length of 1.85 mm, and a width of 1.39 mm after sintering.

Thereafter, the stacked sheet moldings prepared for the electric shock protection unit were sandwiched therebetween, and each of the sheet moldings prepared for the signal transmission unit was stacked up and down 16 pieces each. At this time, the arrangement of the internal electrodes were laminated so that the electrode arrangement of the cross section of the electric shock protection device after sintering was of the type shown in FIG. 7.

After sintering at 900 ℃ under atmospheric pressure and air atmosphere in the kiln to prepare a sintered body having a volume of 0.810㎣.

Thereafter, the external electrode forming composition prepared in the following Preparation Example was applied to both ends of the inner electrodes protruding in parallel so as to be electrically connected in parallel, and then the electrode was baked at 700 ° C. for 120 minutes to obtain a final thickness of 20 μm. To prepare an electric shock protection device as shown in Table 2 provided with an external electrode.

* Preparation

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

Prepared in the same manner as in Example 7, except for changing the composition of the sheet molding as shown in Table 1 to prepare an electric shock protection device as shown in Table 2.

Comparative Example 2

Preparation was carried out in the same manner as in Example 7, after stacking the sheet molding to change the sintering temperature to 750 ℃ instead of 900 ℃ to prepare an electric shock protection device as shown in Table 1.

Experimental Example

The physical properties of the electric shock protection devices manufactured in Examples and Comparative Examples were evaluated by the above-described evaluation method, and are shown in Table 2 below.

			실시예7Example 7	실시예8Example 8	실시예9Example 9	실시예10Example 10	실시예11Example 11	비교예2Comparative Example 2
소결전Before sintering	시트조성물Sheet composition	티탄산바륨(중량부)Barium titanate (parts by weight)	100100	100100	100100	100100	100100	100100
	시트조성물Sheet composition	유리질성분(중량부/유전율)Glassy component (parts by weight / dielectric constant)	20/4020/40	8/408/40	12/4012/40	28/4028/40	33/4033/40	20/4020/40
	감전보호부Electric shock protection department	시트성형물두께(㎛)Sheet molding thickness (㎛)	3030	3030	3030	3030	3030	3030
	신호전달부Signal Transmitter	시트성형물두께(㎛)Sheet molding thickness (㎛)	3030	3030	3030	3030	3030	3030
	신호전달부Signal Transmitter	적층수Stacked Number	3232	3232	3232	3232	3232	3232
소결 후After sintering	소체corpuscle	부피(㎣)Volume	0.8100.810	0.7390.739	0.7950.795	0.8690.869	0.9210.921	1.1031.103
		두께(㎜)Thickness (mm)	0.760.76	0.700.70	0.740.74	0.740.74	0.810.81	0.820.82
		밀도(g/㎡)Density (g / ㎡)	5.345.34	5.565.56	5.455.45	5.165.16	5.085.08	3.863.86
		유전율permittivity	398398	122122	201201	558558	726726	6464
	감전보호부Electric shock protection department	소결후 시트(두께(㎛)/수축율(%))Sheet after sintering (thickness (μm) / shrinkage (%))	21.2/29.321.2 / 29.3	19.6/34.719.6 / 34.7	20.9/30.320.9 / 30.3	22.7/24.322.7 / 24.3	24.9/17.024.9 / 17.0	27.9/7.027.9 / 7.0
	신호전달부Signal Transmitter	소결후 시트(두께(㎛)/수축율(%))Sheet after sintering (thickness (μm) / shrinkage (%))	21.2/29.321.2 / 29.3	19.6/34.719.6 / 34.7	20.9/30.320.9 / 30.3	22.7/24.322.7 / 24.3	24.9/17.024.9 / 17.0	27.9/7.027.9 / 7.0
	정전용량(㎊)Capacitance		3131	1111	2424	3737	6565	측정 불가능Not measurable
물성Properties	ESDESD		Max 15kVMax 15kV	Max 4kVMax 4kV	Max 15kVMax 15kV	Max 10kVMax 10kV	Max 7kVMax 7kV
	누설전류Leakage current		0.17㎂↓0.17㎂ ↓	0.08㎂↓0.08㎂ ↓	0.04㎂↓0.04㎂ ↓	0.36㎂↓0.36㎂ ↓	Max 78.3㎂Max 78.3㎂
	데이터신호 감쇄Data signal attenuation		××	○○	××	××	○○
	단면결함Section defect		××	××	××	××	○ (2개)○ (2)	○(68개)○ (68)

As can be seen in Table 2 above,

In Comparative Example 2 prepared by stacking the same electrode structure and the same sheet molding, as the out of the volume range according to the present invention has a low density, the termination was impossible due to the body strength problem, and thus electrical properties could not be measured. The cross section can also be expected to break down even if 68 defects are detected and used as an electric shock protection device.

In addition, in the case of Example 8, as the content of barium titanate was outside the preferred range according to the present invention, leakage current evaluation was superior to Example 7, but the protection performance against ESD was reduced by 73% compared to Example 7, and the data signal As it is also attenuated, it can be seen that the protection against ESD and data signal reduction suppression function are not properly expressed.

In addition, in the case of Example 11, as the content of the barium titanate is out of the preferred range according to the present invention, it can be confirmed that the leakage current evaluation result is not very good beyond the allowable value (5 mA) in comparison with Example 7, ESD protection It can be seen that the performance is also reduced by 53.3% compared to the seventh embodiment, and it can be seen that all three functions cannot be performed as the data signal is attenuated.

In addition, in the case of Example 9 and Example 10, the content of barium titanate is within the preferred range according to the present invention, it can be seen that both ESD protection, leakage current blocking and data signal attenuation exhibit excellent performance.

Example 13

It was prepared in the same manner as in Example 1, the sheet forming composition was prepared by a doctor blade method (doctor blade) method, and dried for 24 hours at 25 ℃ to prepare a sheet having a thickness of 30㎛. Thereafter, the prepared sheet was cut into a width of 1.14 mm and a length of 0.57 mm to make a plurality of sheets.

First, the internal electrode paste prepared in Preparation Example 1 below was coated on one surface of the sheet molding manufactured to prepare the electric shock protection part, so as to have a thickness of 3 μm, a length of 0.91 mm, and a width of 0.68 mm. At this time, the inner electrode paste was applied so that two inner electrodes were formed on one sheet molded sheet, and the side portions of the sheet electrodes faced each other with respect to the length direction of each inner electrode. The distance between the ends of the body was 230 µm and the separation distance between the electrodes was 40 µm.

In addition, in order to prepare the signal transmission unit, a total of 20 sheet molded articles coated on one surface of the internal electrode paste of Preparation Example were prepared. Specifically, the inner electrode paste was applied to each sheet molding in the shape of the inner electrode 121a of FIG. Thereafter, the stacked sheet moldings prepared for the electric shock protection unit were sandwiched therebetween, and each of the sheet moldings prepared for the signal transmission unit was stacked up and down. At this time, the arrangement of the internal electrodes were laminated so that the electrode arrangement of the cross section of the electric shock protection device after sintering was of the type shown in FIG. 7. After sintering at 980 ° C. under atmospheric pressure and air atmosphere in a sintering furnace, a sintered body having a volume of 0.262 ㎣ was prepared. Thereafter, the external electrode forming composition prepared in the following Preparation Example was applied to both ends of the inner electrodes protruding in parallel so as to be electrically connected in parallel, and then the electrode was baked at 700 ° C. for 120 minutes to obtain a final thickness of 20 μm. To prepare an electric shock protection device as shown in Table 1 with an external electrode.

* Preparation

Prepared in the same manner as in Example 13, but by changing the composition of the sheet molding as shown in Table 3 to prepare an electric shock protection device as shown in Table 3.

Comparative Example 3

Prepared in the same manner as in Example 13, except that the sintering temperature was changed to 850 ℃ to prepare an electric shock protection device as shown in Table 3.

Experimental Example

Table 3 shows the above-described physical properties of the electric shock protection devices manufactured in Examples and Comparative Examples.

			실시예13Example 13	실시예14Example 14	실시예15Example 15	실시예16Example 16	실시예17Example 17	비교예3Comparative Example 3
소결전Before sintering	시트조성물Sheet composition	티탄산바륨(중량부)Barium titanate (parts by weight)	100100	100100	100100	100100	100100	100100
	시트조성물Sheet composition	유리질성분(중량부/유전율)Glassy component (parts by weight / dielectric constant)	40/4040/40	28/4028/40	32/4032/40	48/4048/40	52/4052/40	40/4040/40
	감전보호부Electric shock protection department	시트성형물두께(㎛)Sheet molding thickness (㎛)	3030	3030	3030	3030	3030	3030
	신호전달부Signal Transmitter	시트성형물두께(㎛)Sheet molding thickness (㎛)	3030	3030	3030	3030	3030	3030
	신호전달부Signal Transmitter	총 적층수Total stacks	2020	2020	2020	2020	2020	2020
소결 후After sintering	소체corpuscle	부피(㎣)Volume	0.2800.280	0.2500.250	0.2700.270	0.2890.289	0.3020.302	0.4110.411
		두께(㎜)Thickness (mm)	0.210.21	0.190.19	0.210.21	0.210.21	0.230.23	0.590.59
		밀도(g/㎡)Density (g / ㎡)	5.385.38	5.585.58	5.425.42	5.095.09	4.874.87	3.883.88
		유전율permittivity	748748	559559	685685	909909	10881088	191191
	감전보호부Electric shock protection department	소결후 시트(두께(㎛)/수축율(%))Sheet after sintering (thickness (μm) / shrinkage (%))	22.1/26.322.1 / 26.3	20.9/30.320.9 / 30.3	21.2/29.321.2 / 29.3	22.9/23.722.9 / 23.7	23.4/22.023.4 / 22.0	27.99/6.727.99 / 6.7
	신호전달부Signal Transmitter	소결후 시트(두께(㎛)/수축율(%))Sheet after sintering (thickness (μm) / shrinkage (%))	22.1/26.322.1 / 26.3	20.9/30.320.9 / 30.3	21.2/29.321.2 / 29.3	22.9/23.722.9 / 23.7	23.4/22.023.4 / 22.0	27.99/6.727.99 / 6.7
	정전용량(㎊)Capacitance		34.334.3	22.822.8	37.037.0	44.944.9	50.150.1	8.638.63
물성Properties	ESDESD		Max 15kVMax 15kV	Max 7kVMax 7kV	Max 20kVMax 20kV	Max 8kVMax 8kV	Max 2kVMax 2kV	Max 1kVMax 1kV
	누설전류Leakage current		0.46㎂↓0.46㎂ ↓	0.15㎂↓0.15㎂ ↓	1.48㎂↓1.48㎂ ↓	2.31㎂↓2.31㎂ ↓	8.5㎂↓8.5㎂ ↓	Short(105㎂↑)Short (105㎂ ↑)
	데이터신호Data signal		××	○○	××	××	○○	○○
	단면결함유무Cross section defect		××	××	××	××	××	○(13개)○ (13)

As can be seen in Table 3 above,

In Comparative Example 3 prepared by stacking the same electrode structure and the same sheet molding, as the out of the volume range according to the present invention has a low density, the cross-sectional defects were significantly due to the body strength problem. In addition, it can be seen that both the protection against ESD and the leakage current blocking performance are significantly worse than those of the embodiment.

In addition, in the case of Example 14, the leakage current evaluation was superior to Example 13 as the barium titanate content was outside the preferred range according to the present invention, but the protection performance against ESD was reduced by 53.3% compared to Example 13, and the data signal As it is also attenuated, it can be seen that the protection against ESD and data signal reduction suppression function are not properly expressed.

In addition, in the case of Example 17, as the content of barium titanate is out of the preferred range according to the present invention, it can be confirmed that the leakage current evaluation result is not good beyond 5 kV, which is acceptable compared to Example 13, and ESD protection performance is also good. As compared with Example 13, it can be seen that the decrease was 86.7%. As the data signal is attenuated, all three functions cannot be performed.

In addition, in the case of Example 15 and Example 16, the content of barium titanate is within the preferred range according to the present invention, it can be seen that both ESD protection, leakage current blocking and data signal attenuation exhibit excellent performance.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components Other embodiments may be easily proposed by changing, deleting, adding, etc., but this will also be within the scope of the present invention.

Claims

A body having a volume of 0.025 to 0.06 mm 3 and comprising a barium titanate-based component and a glassy component; And

An internal electrode disposed inside the body;

An electric shock protection device that combines an electric shock protection function that protects against leakage current and static electricity flowing into the inside and a signal transmission function that suppresses and passes the attenuation of the data signal flowing inside.
The method of claim 1,

The electric shock protection device includes an electric shock protection device that is electrically connected in parallel, the electric shock protection unit for protecting the leakage current and static electricity flowing into the inside and the signal transmission section for suppressing passing of the attenuation of the data signal flowing into the interior.
The method of claim 2,

The internal electrode provided in the electric shock protection device includes at least a pair of first internal electrodes, wherein the first internal electrodes are spaced apart in the horizontal or vertical direction to form an electric shock protection unit.
The method of claim 3,

An electric shock protection device further comprising a gap or a discharge material filling part or all of the gap between the pair of spaced apart first internal electrodes.
The method of claim 4, wherein

The volume of the air gap is an electric shock protection device of 1 to 15% of the total volume of the electric shock protection device.
The method of claim 2,

The internal electrode provided in the electric shock protection device includes at least a pair of second internal electrodes, and the second internal electrode is disposed so that at least a part of each electrode surface is overlapped in the vertical direction to form a signal transmission part. .
The method of claim 2,

The electric shock protection unit includes a first internal electrode and the signal transmission unit includes a second internal electrode, and a vertical separation distance between the first internal electrode and the second internal electrode disposed adjacent to each other is 20 to 100 μm. device.
The method of claim 1,

The body has a dielectric constant of 900 ~ 1500 so as to block the attenuation of the incoming data signal, to prevent the passage of static electricity flowing without the insulation breakdown and leakage current of the incoming external power source.
The method of claim 1,

The body is electric shock protection device comprising 30 to 50 parts by weight of the barium titanate-based component with respect to 100 parts by weight of the glass component.
The method of claim 1,

The body has an electric shock protection device having a density of 4.5 ~ 5.8 g / ㎣.
The method of claim 1,

The body has an electric shock protection device having a thickness of 0.2 ~ 0.4㎜.
The method of claim 1,

The body is formed by laminating and sintering a plurality of sheets including a barium titanate-based component and a glassy component,

An electric shock protection device comprising a sheet having the internal electrode formed on one surface of the plurality of sheets having a minimum thickness of 20 μm or more.
The method of claim 1,

The glassy component is an electric shock protection device comprising aluminum oxide and silicon oxide.
The method of claim 13,

The glass component is an electric shock protection device having a dielectric constant of 25 or more.
The method of claim 1,

The electric shock protection device is an electric shock protection device having a capacitance of 4 ~ 100 ㎊.
The method of claim 1,

The electric shock protection device further comprises an external electrode formed on the outer surface of the body to be electrically connected to the internal electrode.
Human contactable conductors;

Circuit part and

And an electric shock protection device according to claim 1, disposed between the conductor and the circuit portion.
The method of claim 17,

The conductor includes at least one of an antenna, a metal case, and conductive jewelry for communication between the electronic device and an external device.