Patent ID: 8455050

Claim:
A method of producing aligned carbon nanotubes, comprising: depositing a metal catalyst film comprised of Al 2 O 3 —Fe on a substrate disposed in a reaction chamber; adjusting a metal catalyst forming the metal catalyst film into metal catalyst fine particles with a density of 1.0×10 11 (N/cm 2 ) to 1.0×10 13 (N/cm 2 ) by supplying a reducing gas toward the metal catalyst film; and growing the aligned carbon nanotubes from the metal catalyst fine particles by supplying a feedstock gas and a catalyst activating material toward the metal catalyst fine particles, and selectively manufacturing single-walled carbon nanotubes, double-walled carbon nanotubes or multi-walled carbon nanotubes by controlling a thickness of the metal catalyst film, wherein the feedstock gas and the catalyst activating material are supplied toward the metal catalyst fine particles in the reaction chamber from ejection holes of a shower head provided with a plurality of the ejection holes disposed so as to face the metal catalyst fine particles formed from the metal catalyst film.