| 摘要 |
PURPOSE:To stabilize a contact state between the surface of an organic positive temperature coefficient thermistor raw body and an electrode, to restrain a resistance value from becoming irregular and to make a temperature distribution uniform, by a method wherein the surface of the organic positive temperature coefficient thermistor is roughened. CONSTITUTION:In an organic positive temperature coefficient thermistor where electrodes 2, 3 composed of a conductive paste have been formed on the surface of an organic positive temperature coefficient thermistor raw body 1, the surface of the organic positive temperature coefficient thermistor raw body 1 is roughened. Accordingly, when the surface of the raw body 1 is observed microscopically, conductive particles are distributed at a prescribed density at least in its recessed parts. When the conductive paste is coated on the roughened surface of the organic positive temperature coefficient thermistor raw body 1, the conductive paste is filled into the recessed parts. Accordingly, the electrodes 2, 3 composed of the conductive paste come into contact with conductive particles whose distribution density is uniform in the organic positive temperature coefficient thermistor raw body 1. By this setup, an influence by a surface layer at an interface between the electrodes 2, 3 composed of the conductive paste and the organic positive temperature coefficient thermistor raw body 1 is eliminated; also a temperature distribution is made uniform. |
