Cermet resistor and method of making same

Details Cermet resistor and method of making same Cermet resistor and method of making same

1980-01-21

1981-07-14

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

29610R, 29620, 252500, 252514, 252518, 338308, 427102, 428323, 428434, H01B 102

Patent

active

042787254

ABSTRACT:
A cermet resistor element utilizing a silver-gold alloy to improve the contact resistance variations and the method of making the element are disclosed. A gold resinate and a silver resinate are mixed with the noble metal resinates and glass frit to make a cermet material. The mixture is heated to drive off the organic resinate materials and to alloy the silver and gold. The resultant material is ground to a powder, reheated and reground. The powder is mixed with a volatile material to form a paste which can be applied to a substrate to form the resistance element. The element is heated to drive off the volatile material and fuse the glass into a solid mass. The silver and gold form a silver-gold alloy during the process and settle on the top surface of the element in globules and improve the contact resistance variations of the element.

REFERENCES:
patent: 2950995 (1960-08-01), Place
patent: 2950996 (1960-08-01), Place et al.
patent: 3252831 (1966-05-01), Ragan
patent: 3326720 (1967-06-01), Brahl et al.
patent: 3342568 (1967-09-01), Capillon
patent: 3573229 (1971-03-01), Herbst et al.
patent: 3609105 (1971-09-01), Cole
patent: 3619287 (1971-11-01), Stankavich
patent: 3639274 (1972-02-01), Brandt et al.

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