Protection device
AssigneePolytronics Technology Corp.
InventorsTung-Cheng TSAI, Po-Chih SHEN, Wei-Tsang TAI
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Abstract
A protection device includes a meltable conductor, an electrode set, and a heating element. The meltable conductor has a core metal layer and a bottom covering layer with low melting point. The core metal layer has a first low melting point metal layer, a second low melting point metal layer, and a high melting point metal layer laminated therebetween. The bottom covering layer with low melting point is disposed on a bottom surface of the core metal layer. The electrode set has a first electrode and a second electrode respectively connected to two terminals of the meltable conductor. The heating element is disposed under the bottom covering layer, thereby heating up and blowing the meltable conductor in the event of over-voltage.
Claims23
A protection device, comprising:
- a meltable conductor having a core metal layer and a bottom covering layer with low melting point, wherein:
- the core metal layer has a first low melting point metal layer, a second low melting point layer, and a high melting point metal layer laminated between the first low melting point metal layer and the second low melting point layer, wherein a melting point of the high melting point metal layer is higher than a melting point of the first low melting point metal layer and a melting point of the second low melting point layer, and a thickness of the second low melting point layer is different from a thickness of the first low melting point metal layer;
- and
- the bottom covering layer is disposed on a bottom surface of the core metal layer;
- an electrode set having a first electrode and a second electrode respectively connected to two terminals of the meltable conductor;
- and
- a heating element disposed below the bottom covering layer, whereby the meltable conductor is heated up and blown by the heating element during an over-voltage event.
A protection device, comprising:
- a meltable conductor having a core metal layer and a bottom covering layer with low melting point, wherein:
- the core metal layer consists of a low melting point metal layer and a high melting point metal layer, wherein the low melting point metal layer covers a top surface and a bottom surface of the high melting point metal layer, and a melting point of the low melting point metal layer is lower than a melting point of the high melting point metal layer;
- and
- the bottom covering layer is disposed on a bottom surface of the core metal layer;
- an electrode set having a first electrode and a second electrode respectively connected to two terminals of the meltable conductor;
- and
- a heating element disposed below the bottom covering layer, whereby the meltable conductor is heated up and blown by the heating element during an over-voltage event.
A protection device, comprising:
- a meltable conductor having a core metal layer and a bottom covering layer with low melting point, wherein:
- the core metal layer consists of a low melting point metal layer and a high melting point metal layer, wherein the high melting point metal layer covers a top surface and a bottom surface of the low melting point metal layer, and a melting point of the low melting point metal layer is lower than a melting point of the high melting point metal layer;
- and
- the bottom covering layer is disposed on a bottom surface of the core metal layer;
- an electrode set having a first electrode and a second electrode respectively connected to two terminals of the meltable conductor;
- and
- a heating element disposed below the bottom covering layer, whereby the meltable conductor is heated up and blown by the heating element during an over-voltage event.
Dependencies are inferred from the claim text.