| 摘要 |
PROBLEM TO BE SOLVED: To improve the stability of the resistance of a high polymer PTC device, having a structure where an electrode is disposed on the opposite surfaces of a sheet of a polymer PTC composition, comprising conductive powder containing metal and a coupling material containing a crystalline high polymer. SOLUTION: A metal, contained in the conductive powder, reduces the action which aids oxidization of a coupling material by providing a coating on the surface of the conductive powder. As the coating, after the coarting of the high polymer material is introduced to the surface of the conductive powder, the high polymer coating is carbonized through heating. Since the coating of carbide is conductive, oxidization of the coupling member can be suppressed, without increasing the resistance of the high polymer PTC device. COPYRIGHT: (C)2004,JPO
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