Megohm resistor paint and resistors made therefrom

Details Megohm resistor paint and resistors made therefrom Megohm resistor paint and resistors made therefrom

1985-08-22

1987-12-08

Swisher, Nancy

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

252518, 428901, 428328, 428404, H01B 106, H01C 710, B32B 1706

Patent

active

047118032

ABSTRACT:
A thick film resistor paint is disclosed, wherein a base metal powder, such as tin oxide powder, is coated with a resinate solution, such as an Mn resinate solution, and the resinate coated powder thus formed is prefired in a reducing atmosphere to form a pre-reacted conductive powder. The pre-reacted conductive powder is then mixed with a glass frit, an oxide of hafnium, and a screening agent to form a thick film resistive paint having a sheet resistivity of from 500,000 ohms to 5 megohms per square. The resistive paint is subsequently screened upon a substrate and fired in an inert atmosphere, preferably at 900.degree. C..+-.20.degree. C., to form a thick film base metal resistor exhibiting a combined TCR within .+-.200 ppm/.degree.C. The glass frit is preferably a tantala glass frit.

REFERENCES:
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patent: 4439352 (1984-03-01), Asada et al.
"Electrical Applications of Thin-Films Produced by Metallo-Organic Deposition," C. Y. Kuo, Solid State Technology, Feb. 1974.

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