Process for fabricating a positive-temperature-coefficient heati

Details Process for fabricating a positive-temperature-coefficient heati Process for fabricating a positive-temperature-coefficient heati

1990-12-14

1992-01-07

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

2281801, 228183, H01C 702

Patent

active

050778897

ABSTRACT:
A process for fabricating a PTC thermistor device. A pair of opposing electrodes are formed on either major surface of a ceramic plate PTC thermistor element. Metallic plate heat radiation fins are secured to the opposing electrodes by brazing in a non-oxidizing environment. The PTC thermistor element is then heat treated in an oxidizing environment. Optionally, the opposing electrodes may include shield layers for preventing emission of gas from the PTC thermistor element during brazing.

REFERENCES:
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patent: 4937435 (1990-06-01), Goss et al.
patent: 4963716 (1990-10-01), Van Den Elst et al.
Peck, C. E.; "Which Atmosphere for Heat-Treating and Brazing?" American Machinist; Jan. 13, 1949; pp. 90-94.

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