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US 8,013,505 B2Granted
Field emission electron source having a carbon nanotube needle
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsYang Wei, Liang Liu, Shou-Shan Fan
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Abstract
A field emission electron source includes a CNT needle and a conductive base. The CNT needle has an end portion and a broken end portion; the end portion is contacted with and electrically connected to a surface of the conductive base. The CNTs at the broken end portion form a taper-shape structure, wherein one CNT protrudes and is higher than the adjacent CNTs.
Claims18
A field emission electron source comprising:
- a conductive base having a surface;
- a carbon nanotube (CNT) needle, the CNT needle comprising a plurality of carbon nanotubes and having an end portion and a broken end portion, the end portion being in contact with and electrically connected to the surface of the conductive base, the broken end portion having a single tip CNT protruding from the other carbon nanotubes, wherein a length of the broken end portion monodirectionally decreases from the single tip CNT to an outer periphery of the broken end portion.
Dependencies are inferred from the claim text.