Patent ID: 6481094
Filing Date: 2002-11-19
Classification: H01C,Y10T

Abstract:
A method of manufacturing a chip PTC thermistor comprising, in sequence:forming a sheet by sandwiching an upper surface and a lower surface of an electrically conductive polymer having a PTC characteristic with metallic foils having a pattern formed thereon, and integrating said sheet by thermal-compression molding; providing at least one opening in said integrated sheet; forming a protective coating on respective first portions of an upper surface and a lower surface of said sheet provided with said opening, said protective coating also serving as a first plating resist, said protective coating formed at a temperature below a melting point of said electrically conductive polymer; forming an electrode by electrolytic plating on said sheet having said protective coating formed thereon; and dividing said sheet having said electrode formed thereon into individual pieces, wherein said providing an opening, forming a protective coating, and forming an electrode, all conducted at a processing temperature not exceeding the melting point of said electrically conductive polymer.