PTC composition and resistive device and LED illumination apparatus using the same

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United States of America Patent

PATENT NO 9177702
APP PUB NO 20140306605A1
SERIAL NO

14017806

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Abstract

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A PTC composition comprises crystalline polymer and conductive ceramic filler dispersed therein. The crystalline polymer has a melting point less than 90° C. and comprises 5%-30% by weight of the PTC composition. The crystalline polymer comprises ethylene, vinyl copolymer or the mixture thereof. The vinyl copolymer comprises at least one of the functional group selected from the group consisting of ester, ether, organic acid, anhydride, imide or amide. The conductive ceramic filler comprises a resistivity less than 500 μΩ-cm and comprises 70%-95% by weight of the PTC composition. The PTC composition has a resistivity about 0.01-5 Ω-cm and its resistance at 85° C. is about 103 to 108 times that at 25° C.

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Patent Owner(s)

  • POLYTRONICS TECHNOLOGY CORP.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dai, Wei Tsang Hsinchu, TW 1 2
Lo, Kuo Chang New Taipei, TW 12 86
Sha, Yi An New Taipei, TW 28 141
Tseng, Chun Teng Sanwan Township, Miaoli County, TW 30 145

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