Method of producing laminated PTC thermistor

Semiconductor device manufacturing: process – Making device or circuit responsive to nonelectrical signal – Thermally responsive

Reexamination Certificate

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C438S054000, C438S106000, C438S238000, C438S382000

Reexamination Certificate

active

06984543

ABSTRACT:
A method of producing a laminated PTC thermistor involves alternately laminating electroconductive pastes to form internal electrodes and ceramic green sheets to form semiconductor ceramic layers with a positive resistance-temperature characteristic to form a laminate, firing the laminate to form a ceramic piece, and forming external electrodes on both of the end-faces of the ceramic piece, and heat-treating the ceramic piece having the external electrodes formed thereon at a temperature between about 60° C. and 200° C.

REFERENCES:
patent: 5815063 (1998-09-01), Goto et al.
patent: 6400251 (2002-06-01), Abe et al.
patent: 50-32496 (1975-03-01), None
patent: 04-206603 (1992-07-01), None
patent: 11-233305 (1999-08-01), None
patent: 11-297508 (1999-10-01), None
patent: 2001-0102536 (2001-11-01), None
Copy of Korean Office Action dated Jun. 17, 2005 (and English translation of same).

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