US Patent 7872407 - Field emission cathode having CNT film

http://www.freepatentsonline.com/7872407.html

Some of the most basic patents from Till Keesman related to the electron emission properties of carbon nanotubes are currently planned for sale by Ocean Tomo. This patent from Hon Hai Precision (FoxConn) teaches ways to improve stability and efficiency for CNT electron emitting films. Claim 1 reads:

1. A field emission cathode comprising:

a conductive substrate comprising a surface; and

a carbon nanotube film disposed on the surface of the conductive substrate,

wherein the carbon nanotube film comprises a plurality of successive and oriented carbon nanotube bundles parallel to the surface of the conductive substrate, and carbon nanotubes partially extruding from the carbon nanotube film.