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AssigneeE. I. Du Pont de Nemours and Company
InventorsRobert Joseph Bouchard, Lap-Tak Andrew Cheng, David Herbert Roadh, Kenneth Warren Hang
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This invention provides a dielectric composition comprising a dielectric which is fireable in air at a temperature in the range of about 450° C. to about 550° C. and a conductive oxide selected from the group consisting of antimony-doped tin oxide, tin-doped indium oxide, a transition metal oxide which has mixed valence states or will form mixed valence states after firing in a nitrogen atmosphere at a temperature in the range of about 450° C. to about 550° C. and normally conducting precious metal oxides such as ruthenium dioxide, wherein the amount of conductive oxide present is from about 0.25 wt % to about 25 wt % of the total weight of dielectric and conductive oxide. This dielectric composition has reduced electrical resistance and is useful in electron field emission devices to eliminate charging of the dielectric in the vicinity of the electron emitter and the effect of static charge induced field emission.
A dielectric composition comprising (a) a mixture of oxides that is fireable in air at a temperature in the range of about 450° C. to about 550° C., and (b) antimony-doped tin oxide in an amount of from about 0.5 wt % to about 15 wt % of the total weight of the composition wherein the mixture of oxides (a) comprises a solid solution comprised of about 1 to about 26 wt % SiO2, about 0.5 to about 6 wt % Al2O3, about 6 to about 24 wt % B2O3, about 2 to about 24 wt % ZnO, about 0.1 to about 5 wt % Na2O and about 20 to about 75 wt % Bi2O3.
A dielectric composition comprising (a) a mixture of oxides that is fireable in air at a temperature in the range of about 450° C. to about 550° C., and (b) antimony-doped tin oxide in an amount of from about 0.25 wt % to 25 wt % of the total weight of the composition;
An electron field emission device that comprises an anode and a cathode;
Dependencies are inferred from the claim text.