| abstract |
PROBLEM TO BE SOLVED: To realize an improved field emission device including a carbon nanotube electron field emitter structure. An adhesive carbon nanotube film (including single-walled or multi-walled nanotubes) is formed on a relatively flat conductive substrate. The present invention realizes a carbon nanotube film that adheres strongly. In addition, to improve the emission characteristics, a portion of the nanotubes in the film (eg, at least 50% by volume) can be aligned in approximately the same direction, with their long axis oriented perpendicular to the substrate surface. Is possible. In one embodiment, the single-walled carbon nanotube is made of a material that reacts with carbon such as a carbon-soluble element (eg, Ni, Fe, Co) or a carbide-forming element (eg, Si, Mo, Ti, Ta, Cr). Formed on the containing substrate. It is also possible to use a substrate having a low melting point material such as aluminum. [Selection] Figure 3 |