| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for attaining low resistance of laminated type PTC thermistor while keeping high PTC property. SOLUTION: In a manufacturing method of a laminated type thermistor having positive resistance temperature property, a semiconductor ceramic layer and an inner electrode made up of Ni-based metal are laminated by turns, and the inner electrode and an external electrode connected electrically to the inner electrode are included. The semiconductor ceramic layer is constituted from a sintered body, which contains compound shown as a composition formula(1): (Ba<SB>1-w-x</SB>Sr<SB>w</SB>RE<SB>x</SB>)<SB>α</SB>TiO<SB>3</SB>+βSiO<SB>2</SB>+zMnO. The raw materials about Ba, Sr, RE, Ti, Si of the semiconductor ceramic layer are heated and maintained at a predetermined temperature, and a temporarily sintered body is obtained, and then the obtained body is pulverized. Raw material for Mn of the semiconductor ceramic layer and binder, are added to the obtained pulverized powder. The raw material for Mn of the semiconductor ceramic layer may be added at the time of pulverization of the temporarily sintered body. COPYRIGHT: (C)2008,JPO&INPIT
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