Field emission cathode structure
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsPeng Liu, Shou-Shan Fan
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Abstract
A field emission cathode structure includes a first carbon nanotube structure including a plurality of first carbon nanotubes, and a second carbon nanotube structure located on the surface of the first carbon nanotube structure. The second carbon nanotube structure includes a plurality of second carbon nanotubes substantially perpendicular to the first carbon nanotubes structure. The second carbon nanotube structure includes a peak. The heights of the second carbon nanotubes at the peak are tallest. The heights of the carbon second carbon nanotubes gradually decrease along the direction away from the peak. A method for fabricating the field emission cathode structure is also presented.
Claims19
A field emission cathode structure comprising:
- a first carbon nanotube structure comprising a plurality of first carbon nanotubes, wherein the plurality of first carbon nanotubes are joined end to end along an alignment direction;
- a second carbon nanotube structure located on a surface of the first carbon nanotube structure, the second carbon nanotube structure comprising a plurality of second carbon nanotubes substantially perpendicular to the first carbon nanotube structure;
- wherein the second carbon nanotube structure comprises a peak, and heights of the plurality of second carbon nanotubes gradually decrease along a direction away from the peak.
A field emission cathode structure comprising:
- a first carbon nanotube structure comprising a plurality of first carbon nanotubes, wherein the first carbon nanotube structure is a free-standing structure;
- a second carbon nanotube structure located on a surface of the first carbon nanotube structure, the second carbon nanotube structure comprising a plurality of second carbon nanotubes, substantially perpendicular to the first carbon nanotubes structure and forming an array;
- wherein the plurality of second carbon nanotubes are arranged in a plurality of rows, and the plurality of rows are aligned substantially along an alignment direction of the first carbon nanotubes, heights of the second carbon nanotubes are gradually decrease away from the middle row, and the heights of the second carbon nanotubes in the middle row being the highest.
A field emission cathode structure comprising:
- a first carbon nanotube structure comprising a plurality of first carbon nanotubes arranged substantially along an alignment direction and joined end to end;
- a plurality of second carbon nanotube structures located on a surface of the first carbon nanotube structure, and each of the plurality of carbon nanotube structures comprises a plurality of carbon nanotubes;
- wherein each of the plurality of second carbon nanotube structures comprises a peak, and a height of the carbon nanotubes in the peak is the tallest, and a cross-section of each of the plurality of second carbon nanotube structures is triangular.
Dependencies are inferred from the claim text.