Method for fabricating negative temperature coefficient...

Details Method for fabricating negative temperature coefficient... Method for fabricating negative temperature coefficient...

2011-08-09

2011-08-09

Phan, Thiem (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S619000, C029S621000

Reexamination Certificate

active

07992285

ABSTRACT:
A method for fabricating a negative temperature coefficient thermistor is provided, including the steps of: (A) combining ceramic powders having a negative temperature coefficient of resistance, a polymer binder and a solvent to form a mixture; (B) removing the solvent and granulating the mixture to form granulous powders; (C) compressing the granulous powders to obtain a thermistor material with a specific shape; (D) curing the thermistor material at 80° C. to 350° C.; and (E) mounting an electrode to the thermistor material to form the negative temperature coefficient thermistor. The method can be performed in a low temperature without the problem of interface diffusion. Further, the desired resistance value and thermistor constant (B) can be easily adjusted and obtained by mixing ceramic powders with different characteristics of temperature coefficient of resistance and/or the addition of conductive metal powder.

REFERENCES:
patent: 7007872 (2006-03-01), Yadav et al.
patent: 2008/0009578 (2008-01-01), Khatua et al.

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