The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2015
Filed:
Sep. 04, 2013
Kuo Chang Lo, New Taipei, TW;
Wei Tsang Dai, Hsinchu, TW;
Yi an Sha, New Taipei, TW;
Chun Teng Tseng, Sanwan Township, Miaoli County, TW;
Kuo Chang Lo, New Taipei, TW;
Wei Tsang Dai, Hsinchu, TW;
Yi An Sha, New Taipei, TW;
Chun Teng Tseng, Sanwan Township, Miaoli County, TW;
POLYTRONICS TECHNOLOGY CORP., Hsinchu, TW;
Abstract
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 10to 10times that at 25° C.