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US 7,982,382 B2Granted
Thermionic electron source
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsPeng Liu, Liang Liu, Kai-Li Jiang, Shou-Shan Fan
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Abstract
A thermionic electron source includes a substrate, at least two electrodes, and a thermionic emitter. The electrodes are electrically connected to the thermionic emitter. The thermionic emitter has a film structure. Wherein there a space is defined between the thermionic emitter and the substrate.
Claims14
A thermionic electron source comprising:
- a substrate;
- two electrodes;
- and
- a thermionic emitter, the thermionic emitter being electrically connected to the two electrodes, the thermionic emitter having a film structure;
- wherein a space is defined between the thermionic emitter and the substrate;
- wherein the thermionic emitter comprises a carbon nanotube layer;
- wherein the carbon nanotube layer comprises multiple overlapped carbon nanotube films;
- wherein each of the multiple overlapped carbon nanotube films comprises a plurality of carbon nanotubes oriented along a preferred orientation and adjacent films are set at an angle between the aligned directions of the carbon nanotubes.
5 more elements
Dependencies are inferred from the claim text.