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CARBON NANOTUBE, SUBSTRATE AND ELECTRON EMITTING ELEMENT EQUIPPED THEREWITH, SUBSTRATE FOR CARBON NANOTUBE SYNTHESIS, PROCESS FOR PRODUCING THEM, AND PRODUCTION APPARATUS
CARBON NANOTUBE, SUBSTRATE AND ELECTRON EMITTING ELEMENT EQUIPPED THEREWITH, SUBSTRATE FOR CARBON NANOTUBE SYNTHESIS, PROCESS FOR PRODUCING THEM, AND PRODUCTION APPARATUS
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机译:碳纳米管,装备有基质和电子发射元件,碳纳米管合成用基质,生产它们的方法和生产装置
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摘要
A novel carbon nanotube (64) is featured in that it has the highest Raman scattering intensity in the vicinity of 1580 cm-1 in its Raman spectrum. Carbon nanotubes can be grown on and from the catalytic fine particles (63) which consist of ultra-fine particles of cobalt oxide catalyst onto a substrate comprising a conductive substrate (62) and fine particles (63) of catalyst formed on a surface thereof. An electron emission device (60) so configured as to emit electrons by applying a voltage to apical ends (64a) of such carbon nanotubes (64) can be reduced in driving voltage and can achieve a current such as to emit a fluorescent material on the market for low-velocity electron beams. The electron emission device (60) needs no gate and can thus simplify the structure and reduce the cost of a surface light-emitting device for which the element is used. The carbon material remains unoxidized even in a low vacuum and thus allows realizing a light emitting device that can be paneled more easily, and is longer in operating life than those using a conventional electron emission device.
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