Over-current protection device and manufacturing method thereof
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United States of America Patent
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app pub date -
Jul 26, 2006
filing date -
Dec 31, 2003
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Abandoned
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Abstract
An over-current protection device comprises two electrode foils, at least one conductive layer and a positive temperature coefficient (PTC) layer, wherein at least one of the electrode foils comprises a micro-rough surface, and the micro-rough surface of the electrode foil is overlaid by the conductive layer. The PTC layer is stacked between the two electrode foils, and at least one of the surfaces of the PTC layer is physically in contact with the at least one conductive layer. Accordingly, the conductive layer located between the PTC layer and the electrode foil can effectively decrease the contact resistance therebetween and avoid arcing.
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