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:
May. 26, 2015
Filed:
Jun. 05, 2013
Polytronics Technology Corp., Hsinchu, TW;
David Shau Chew Wang, Taipei, TW;
Wen Feng Lee, Taoyuan, TW;
En Tien Yang, Taipei, TW;
Chun Teng Tseng, Miaoli, TW;
Yi An Sha, New Taipei, TW;
POLYTRONICS TECHNOLOGY CORP., Hsinchu, TW;
Abstract
A surface mountable over-current protection device comprises one PTC material layer, first and second conductive layers, first and second electrodes, and an insulating layer. The PTC material layer comprises crystalline polymer and conductive filler dispersed therein. The first and second conductive layers are disposed on first and second planar surfaces of the PTC material layer, respectively. The first and second electrodes are electrically connected to the first and second conductive layers. The insulating layer is disposed between the first and the second electrodes for insulation. At the melting point of the crystalline polymer, the CTE of the crystalline polymer is greater than 100 times the CTE of the first or second conductive layer, and the first and/or second conductive layers has a thickness which is large enough to obtain a resistance jump value R3/Ri less than 1.4.