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US 8,628,695 B2Granted
Surface-modified ruthenium oxide conductive material, lead-free glass(es), thick film resistor paste(s), and devices made therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorsKenneth Warren Hang, Marc H. Labranche, Barry Edward Taylor, Paul Douglas Vernooy
Life of this patent
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Abstract
The invention relates to a surface-modified RuO2 conductive and a lead-free powdered glass material formulated to make a paste suitable for application to the manufacture of a thick film resistor material. The resistance range that is most suitable to this invention is a resistor having 10 kilo-ohms to 10 mega-ohms per square of sheet resistance. The resulting resistors have ±100 ppm/° C. TCRs.
Claims15
A composition comprising:
- (a) One or more coated ruthenium-containing component, wherein the ruthenium-containing component comprises one or more component selected from the group consisting of:
- ruthenium oxide and ruthenium oxide hydrate, and wherein the coating comprises one or more acidic component, one or more basic component, or a combination thereof, said acidic component is selected from B, F, P, Se, or combinations thereof and said basic component is selected from Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, or combinations thereof;
- (b) One or more lead free glass frits, said one or more lead free glass frits comprising SiO2 3-37 wt %, Al2O3 3-13 wt %, and B2O3 11-38 wt %, based upon the weight of said one or more glass frits;
- and
- (c) An organic vehicle.
2 more elements
Dependencies are inferred from the claim text.