Patent ID: 8389058

Claim:
A method for manufacturing a carbon nanotube film, the method comprising the steps of: providing a carbon nanotube array and a drawing tool, the carbon nanotube array comprising a plurality of carbon nanotubes arranged on a substrate approximately along a growth direction of the carbon nanotubes; positioning the drawing tool close to the carbon nanotube array and selecting some carbon nanotubes of the carbon nanotube array; drawing the selected carbon nanotubes at an uniform speed, away from the carbon nanotube array along a drawing direction at a drawing angle, the drawing angle being an angle of inclination between the drawing direction and the growth direction, the angle being less than or equal to 80 degrees, thereby forming the carbon nanotube film; wherein the carbon nanotube film comprises a plurality of first areas and a plurality of second areas, the first and second areas each comprising a plurality of successively oriented carbon nanotubes joined end-to-end by Van der Waals attractive force therebetween, the first areas and the second areas having different densities of carbon nanotubes.