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:
Dec. 02, 2025
Filed:
Apr. 05, 2023
Polytronics Technology Corp., Hsinchu, TW;
Chen-Nan Liu, Changhua County, TW;
Yung-Hsien Chang, Douliu, TW;
Cheng-Yu Tung, Tainan, TW;
Hsiu-Che Yen, Taoyuan, TW;
Chia-Yuan Lee, Hsinchu, TW;
Yao-Te Chang, Yunlin County, TW;
Fu-Hua Chu, Taipei, TW;
POLYTRONICS TECHNOLOGY CORP., Hsinchu, TW;
Abstract
An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a polymer matrix and a first conductive filler. The polymer matrix includes a polyolefin-based polymer and a fluoropolymer. The fluoropolymer has a melt flow index higher than 1.9 g/10 min, and the polyolefin-based polymer and the fluoropolymer together form an interpenetrating polymer network (IPN). The first conductive filler has a metal-ceramic compound dispersed in the polymer matrix.