Patent ID: 6348852
Filing Date: 2002-02-19
Classification: H01C,Y10T

Abstract:
A chip PTC thermistor comprising:a) a conductive polymer having PTC properties; b) a first outer electrode in contact with said conductive polymer; c) a second outer electrode sandwiching said conductive polymer with said first outer electrode; d) one or more inner electrode disposed in between and parallel to said first and second outer electrodes and sandwiched between said conductive polymer e) a first electrode directly electrically coupled with said first outer electrode; and f) a second electrode disposed separately from said first electrode; wherein when counting from one inner electrode, which is the closest to said first outer layer electrode, and defining an inner electrode located â€œnâ€ th as a â€œnâ€ th inner electrode, odd-numbered inner electrodes are directly coupled with said second electrode and even-numbered inner electrodes, with said first electrode, wherein when the total number of said inner electrodes is an odd number, said second outer electrode is electrically directly coupled with said first electrode, and if it is an even number, coupled with said second electrode, and wherein cross sections where said odd-numbered and even numbered inner electrodes are respectively coupled with said second and first electrodes are at least 1.3 times thicker than other sections.