Field emission device and method for manufacturing same

A method for manufacturing a field emission device, comprising the steps of:

• providing a carbon nanotube array slice preform, the carbon nanotube array slice preform comprising a matrix and a plurality of carbon nanotube segments incorporated in the matrix;
• placing the carbon nanotube array slice preform on a cathode substrate;
• heating the matrix so as to change the matrix into a liquid state;
• removing the liquid state matrix after the matrix becomes liquid;
• wherein the carbon nanotube array slice preform is made by a method comprising the steps of:
• providing a carbon nanotube array;
• immersing the carbon nanotube array into the matrix;
• solidifying the matrix so as to cause the carbon nanotube array to be embedded in the matrix;
• transversely slicing the carbon nanotube array thereby obtaining the carbon nanotube array slice preform.