Patent ID: 8366853

Claim:
A method for making a carbon nanotube film, the method comprising: providing a carbon nanotube array formed on a continuously curving surface of a growing substrate; selecting a carbon nanotube segment from the carbon nanotube array using a drawing tool; and drawing the carbon nanotube segment away from the carbon nanotube array to achieve the carbon nanotube film; wherein the continuously curving surface is a cylindrical surface defined by a directrix and a generatrix moving along the directrix, the drawing tool moves away from the carbon nanotube array at a direction perpendicular to the generatrix, the method further comprises: providing a laminar protecting substrate wound on a first spool the laminar protecting substrate including a first surface and a second surface, the first surface capable of having the carbon nanotube film adhered to it, the second surface capable of having the carbon nanotube film released from it; applying the carbon nanotube film to the first surface of the laminar protecting substrate; and unwinding the laminar protecting substrate from the first spool to continue to pull the carbon nanotube segment away from the carbon nanotube array thereby continue to apply the carbon nanotube film to the first surface of the laminar protecting substrate.