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. 15, 2005
Filed:
Jun. 24, 2004
Soo-an Choi, Kyunggi-do, KR;
Jong-ho Lee, Kyunggi-do, KR;
Chang-hee Choi, Seoul, KR;
Tae-sung Kim, Seoul, KR;
Jun-ku Hahn, Seoul, KR;
Soo-An Choi, Kyunggi-do, KR;
Jong-Ho Lee, Kyunggi-do, KR;
Chang-Hee Choi, Seoul, KR;
Tae-Sung Kim, Seoul, KR;
Jun-Ku Hahn, Seoul, KR;
LG Cable, Ltd., Seoul, KR;
Abstract
An electrical device including a PTC conductive polymer sheet, and first and second electrodes physically contacted with opposite surfaces of the conductive polymer sheet is disclosed. The first and second electrodes have a plurality of protrusions protruded from surfaces thereof, respectively. The protrusions have an surface roughness (Rz) of 1 to 20 μm and an average width ({overscore (Rw)}) which is 0.5 to 2 times of the surface roughness (Rz), and an average gap ({overscore (Rg)}) between adjacent protrusions is 0.5 and 2 times of the surface roughness (Rz). The conductive polymer sheet has a thickness which is more than 5 times of the surface roughness (Rz).