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US 8,076,834 B2Granted
Field emission device with protecting vapor
AssigneeE.I. du Pont de Nemours and Company
InventorsAdam Fennimore, David Herbert Roach
Life of this patent
Estimating the term…
Abstract
A field emission device in which a protecting vapor is present in an evacuated space between a field emission cathode assembly and an anode. The protecting vapor may be one or more hydrogen-containing gases such as a gas containing M—H bonds where M may be C, Si, B, Al or P.
Claims10
A method for increasing the lifespan of a field emission device comprising
- (a) providing a field emission device that comprises (i) a cathode assembly, (ii) an anode, and (iii) an evacuated space between the cathode and the anode;
- and
- (b) supplying to the evacuated space a protecting vapor that has, within the evacuated space, a partial pressure greater than about 10-8 Torr at 20° C.;
- wherein the protecting vapor is selected from any one or more members of the group consisting of methane, ethane, propane, ethylene, propylene, acetylene and propyne.
1 more element
A field emission device that comprises (a) a cathode assembly, (b) an anode and (c) an evacuated space between the cathode assembly and the anode;
- wherein the evacuated space comprises a protecting vapor that has within the evacuated space a partial pressure greater than about 10-8 Torr at 20° C.;
- wherein the protecting vapor is selected from any one or more members of the group consisting of methane, ethane, propane, ethylene, propylene, acetylene and propyne.
Dependencies are inferred from the claim text.