US Patent 7247980 - CNT/Diamond electron emitter paste

http://www.freepatentsonline.com/7247980.html

Carbon nanotubes are very efficient electron emitters with emission occurring at fields of about 1 V/micron to produce current densities over 1 A/cm2. However, when mixed with paste to form a film the efficiency is decreased. This patent focused on an optimized emitter paste using carbon nanotubes, diamond and other components. Claim 1 reads:

1. An emitter paste composition of a field emission cell, comprising 2 wt % to 20 wt % of a carbon nanotube, a binder, glass frit, a dispersing agent, an organic solvent, and 0.1 wt % to 20 wt % of diamond, based on a weight thereof.