| 摘要 |
PROBLEM TO BE SOLVED: To provide a macromolecular PTC element and the manufacturing method of the same stabilized in characteristics upon repeating switching operation, in the macromolecular PTC element having a structure wherein a form consisting of a PTC composite obtained by filling a crystalline polymer with conductive powder is provided with an electrode. SOLUTION: A recessed and projected structure is introduced into a surface by a method wherein a metallic carbide, represented by titanium carbide (TiC) as the conductive powder, is employed and etching treatment is applied on the conductive powder before kneading with a binder. The recess and projection realizes anchor effect upon bonding an interface between the binder and the surface of conductive powder, and reduces the initial value of resistivity of the macromolecular PTC element to improve the stability of characteristics upon repeating the switching operation. COPYRIGHT: (C)2005,JPO&NCIPI
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