Electric shock-prevention element and electronic device provided with same (moda-innochips technology) electricity clipart

The present disclosure relates to a device for preventing an electric shock, and more particularly, to a device for preventing an electric shock, which is capable of preventing an electric shock voltage from being transmitted to a user through a chargeable electronic device such as a smartphone.

Mobile communication terminals has changed in main use from the voice communication to the data communication service and then evolved to smart-based life convenience service. Also, as smartphones are multifunctionalized, various frequency bands are being used. That is, a plurality of functions using different frequency bands such as wireless LAN, Bluetooth, and GPS in one smartphone have been adopted. Also, as electronic devices are highly integrated, an internal circuit density in a limited space increases. Thus, noise interference between internal circuits may necessarily occur. A plurality of circuit protection devices for suppressing noises of various frequencies of the portable electronic devices and noises between the internal circuits are being used. For example, a condenser, a chip bead, a common mode filter, and the like, which respectively remove noises of frequency bands different from each other, are being used.

In recent years, with an increased emphasis on the elegant image and durability of the smartphone, the supply of terminals using a metal material is increasing. That is, the supply of a smartphone of which a border is manufactured by using a metal, or the rest case except for a front image display part is manufactured by using a metal is increasing.

However, since an overcurrent protection circuit is not built, or charging is performed by using a non-genuine charger or a faulty charger using a low-quality element, shock current may occur. The shock current may be transmitted to a ground terminal of the smartphone and then transmitted again from the ground terminal to the metal case. Thus, a user contacting the metal case may get shocked. As a result, when the smartphone is used while the smartphone using the metal case is charged by using the non-genuine charger, an electric shock accident may occur.

In accordance with an exemplary embodiment, a device for preventing an electric shock includes: a stacked body in which a plurality of insulation sheets are stacked; a capacitor part including a plurality of internal electrodes disposed in the stacked body; an ESD protection part disposed in the stacked body and including at least two or more discharge electrodes and at least one ESD protection layer disposed between the discharge electrodes; and an external electrode disposed on each of at least two side surfaces outside the stacked body and connected to the capacitor part and the ESD protection part, wherein at least one region of the ESD protection layer has a thickness and width of which at least one is different from that of the other region.

A length of the internal electrode in one direction may be greater than or equal to that of the discharge electrode, and a width of the internal electrode in the other direction perpendicular to the one direction may be greater than each of that of the ESD protection layer and that of the discharge electrode.

When a distance between the discharge electrode and the internal electrode adjacent to the discharge electrode is A, a distance between the discharge electrodes is B, and a distance between the internal electrodes is C, A≤C or A≤B may be satisfied.

The ESD protection material may be disposed in at least one region within a through hole so that the ESD protection material does not contact the discharge electrode, and a void may be defined in a remaining region within in the through hole.

In accordance with another exemplary embodiment, a device for preventing an electric shock includes: a stacked body in which a plurality of insulation sheets are stacked; a capacitor part including a plurality of internal electrodes disposed in the stacked body; an ESD protection part disposed on at least a portion of the insulation sheets to protect an ESD voltage; and an external electrode disposed on each of at least two side surfaces outside the stacked body and connected to the capacitor part and the ESD protection part, wherein the ESD protection part includes at least two or more discharge electrodes and at least one ESD protection layer disposed between the discharge electrodes, at least one region of the ESD protection layer has a thickness and width of which at least one is different from that of the other region, and a length of the internal electrode in one direction is greater than or equal to that of the discharge electrode, a width of the internal electrode in the other direction perpendicular to the one direction is greater than each of that of the ESD protection layer and that of the discharge electrode, and the ESD protection layer has a width greater than that of the discharge electrode.

When a distance between the discharge electrode and the internal electrode adjacent to the discharge electrode is A, a distance between the discharge electrodes is B, and a distance between the internal electrodes is C, A≤C or A≤B may be satisfied.

In accordance with further another exemplary embodiment, an electronic device includes a device for preventing an electric shock that is disposed between a metal case and an internal circuit to block an electric shock voltage and bypass an ESD voltage, wherein the device for preventing the electric shock includes: a stacked body in which a plurality of insulation sheets are stacked; a capacitor part including a plurality of internal electrodes disposed in the stacked body; an ESD protection part disposed on at least a portion of the insulation sheets to protect an ESD voltage; and an external electrode disposed on each of at least two side surfaces outside the stacked body and connected to the capacitor part and the ESD protection part, wherein the ESD protection part includes at least two or more discharge electrodes and at least one ESD protection layer disposed between the discharge electrodes, at least one region of the ESD protection layer has a thickness and width of which at least one is different from that of the other region, and a length of the internal electrode in one direction is greater than or equal to that of the discharge electrode, a width of the internal electrode in the other direction perpendicular to the one direction is greater than each of that of the ESD protection layer and that of the discharge electrode, and the ESD protection layer has a width greater than that of the discharge electrode.

When a distance between the discharge electrode and the internal electrode adjacent to the discharge electrode is A, a distance between the discharge electrodes is B, and a distance between the internal electrodes is C, A≤C or A≤B may be satisfied.