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US 11,810,774 B2Granted
Field emission devices
AssigneeGovernment of the United States as Represented by the Secretary of the Air Force
InventorsJoseph M. Connelly, John R. Harris, John W. Lewellen
Life of this patent
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Abstract
A method for making field emission devices so that they have emitter tips in the form of a needle-like point with a width and length configured such that ratio of the width to the length ranges from about 0.001 to about 0.05, and associated methods for making the tips by 3-D printing.
Claims20
A method for making a field emission device, comprising the steps of:
- providing an array of emitter tips;
- and
- coating portions of the emitter tips with a conductive material by depositing the conductive material onto the emitter tips from one side only of the emitter tips at an angle of from about 30 degrees to about 60 degrees relative to the length axis of the emitter tips such that the conductive material is deposited onto the emitter tips in a sharp tip configuration in the form of a needle-like point with a width and length configured such that the ratio of the width to the length ranges from about 0.001 to about 0.05.
A method for making a field emission device, comprising the steps of:
- providing an array of emitter tips;
- and
- coating portions of the emitter tips with a conductive material such that the conductive material is deposited onto the emitter tips in a sharp tip configuration in the form of a needle-like point with a width and length configured such that ratio of the width to the length ranges from about 0.001 to about 0.05.
A method for making a field emission device, comprising the steps of:
- providing an emitter tip by 3-D printing, wherein the emitter tip has a width and a length;
- and
- configuring the emitter tip during printing such that the ratio of the width of the emitter tip to the length of the emitter tip ranges from about 0.001 to about 0.05.
Dependencies are inferred from the claim text.