Tuesday, October 24, 2006

US Patent 7125308 - Electron Emittion Nanotube Formed By Sand Blasting


Electron emitting nanotubes have many potential applications in flat panel displays, electron beam lithography, vacuum electronics, etc. Conventionally, the nanotubes are grown from catalytic particles on a substrate using CVD methodology. However, CVD is a high temperature process and cheaper manufacturing methods are being sought. This patent teaches deposition of a nanotube paste via inkjet of silkscreening and exposure of the nanotubes used for electron emission by particle bombardment. Claim 1 reads:

1. A method for enhancing field emission properties of a cold cathode by bead blasting a surface of the cold cathode material, wherein the cold cathode material includes carbon nanotubes.