Thermistor and method of making the same

Details Thermistor and method of making the same Thermistor and method of making the same

H - Electricity

01

C

356/108

H01C 7/00 (2006.01) H01C 7/04 (2006.01) H01C 17/02 (2006.01)

Patent

CA 2019331

A method of making a thermistor comprising the steps of making a layer of thermistor ceramic material comprised substantially of Mn2O3, NiO, Co3O4, Al2O3, CuO, or Fe2O3, having upper and lower surfaces. A first dielectric material comprised of low K Al2O3 or the like is placed on the upper and lower surfaces of the layer, and then is cut into a plurality of elongated strips. The layer is created by blading a slurry of the ceramic material to create a plurality of uncured sheets; placing the sheets in superimposed position, and then making the monolithic layers from the sheets by applying heat and pressure thereto, and then firing the monolithic layer with heat of increased magnitude. The strips are encapsulated in an envelope of the dielectric material, and terminal connections comprised of silver, Ni, Sn and Pb are imposed thereon. A therm- istor chip or strip comprising an elongated ceramic thermistor body with an outside surface and opposite ends. A dielectric envelope encapsulates the outer surface of the body for the ends, and conductive terminal caps are formed on the end of the body. The thermistor is comprised of the materials outlined in the method of making the same.

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