| 摘要 |
PROBLEM TO BE SOLVED: To improve without voltage without raising a resistance of a polymeric PTC element, where electrodes are arranged on a sheet-like compact of an admixture in which metallic conductive powers are distributed, in a binding material comprising a crystalline polymeric compound. SOLUTION: An inclination degree is given to thickness of the polymeric PTC element. Contribution of a thin part to resistance reduction and contribution of a thick part to withstand voltage are used. Thus, the polymeric PTC element having lower resistance and higher withstand voltage as compared to that having conventional thickness and a uniform structure can be obtained. COPYRIGHT: (C)2004,JPO
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