Patent ID: 8163340

Claim:
A method for making a carbon nanotube film structure, the method comprising the steps of: (a) providing a growing device, the growing device comprising a reacting room having a gas inlet and a gas outlet, a growing substrate, a receiving substrate, a rotatable supporter disposed in the reacting room and a second supporter disposed in the reacting room closer to the gas inlet than the rotatable supporter, wherein a catalyst layer is located on the growing substrate; (b) placing the growing substrate on the second supporter, and placing the receiving substrate on the rotatable supporter; (c) growing carbon nanotubes from the growing substrate such that the carbon nanotubes are brought above the receiving substrate by a gas flow and deposited onto the receiving substrate by the force of gravity, wherein both the growing and transfer step occur in the reaction room, and the growing carbon nanotubes comprises the steps of introducing a carbonaceous gas along a direction of the gas flow and stopping the introducing the carbonaceous gas, and the carbon nanotubes above the receiving substrate are deposited onto the receiving substrate only by the force of gravity after the stopping the introduction the carbonaceous gas; and (d) changing the growing substrate, and growing more carbon nanotubes to form at least two carbon nanotube films on the receiving substrate.