Over-current protection device
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United States of America Patent
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N/A
Issued Date -
Feb 1, 2007
app pub date -
Jun 14, 2006
filing date -
Jul 28, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention discloses an over-current protection device comprising two metal foils and a positive temperature coefficient (PTC) material layer. The PTC material layer is sandwiched between the two metal foils and contains at least one crystalline polymer, a non-oxide electrically conductive ceramic powder and a non-conductive filler. The non-oxide electrically conductive ceramic powder exhibits a certain particle size distribution. The PTC material layer presents resistivity below 0.1 .OMEGA.-cm.
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