发明名称 |
Carbon nanotubes, substrate and electron emission device with such carbon nanotubes and carbon nanotube sythesizing substrate as well as methods of and apparatus for making them |
摘要 |
<p>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.</p> |
申请公布号 |
EP1988056(A3) |
申请公布日期 |
2009.04.08 |
申请号 |
EP20080011320 |
申请日期 |
2006.11.24 |
申请人 |
NATIONAL INSTITUTE FOR MATERIALS SCIENCE;TOPPAN PRINTING CO., LTD. |
发明人 |
ANDO, TOSHIHIRO;NAKAGAWA, KIYOHARU;GAMO, MIKA;GAMO, HIDENORI |
分类号 |
C01B31/02;H01J1/304;H01J9/02 |
主分类号 |
C01B31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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