Patent ID: 6782604
Filing Date: 2004-08-31
Classification: H01C,Y10T

Abstract:
A method of manufacturing a chip PTC thermistor comprising:forming an integrated sheet by sandwiching a conductive polymer having PTC characteristics between metal foils having comb-shaped openings and integrating the polymer and metal foils by heat pressing, said comb shaped openings each comprising (1) a main opening and (2) a plurality of sub-openings formed perpendicular to the main opening, providing through openings in said integrated sheet, said through openings penetrating through a top surface and a bottom surface of said integrated sheet, providing protective coatings on said top surface and said bottom surface of the integrated sheet except an area in a vicinity of the openings, forming an electrode on an inner wall of the through openings and in the vicinity of the through openings, and dividing the sheet having said electrode and said through openings into pieces by cutting along lines of the sub-openings.