Article comprising enhanced nanotube emitter structure and...

Details Article comprising enhanced nanotube emitter structure and... Article comprising enhanced nanotube emitter structure and...

H - Electricity

01

J

H01J 23/04 (2006.01) H01J 1/00 (2006.01) H01J 9/02 (2006.01) H01J 23/06 (2006.01)

Patent

CA 2294656

An improved process for fabricating nanotube field emitter structures is provided, in which the nanotubes protrude from a supporting base material to improve emission properties. The resulting emitter structure are useful in a variety of devices, including microwave vacuum tube devices and flat-panel, field-emission displays. To attain the protruding nanotube emitter structure, according to one embodiment of the invention, nanotubes and metal particles are mixed and consolidated into a compact, and the compact is then sectioned to expose a substantial number of nanotube ends. A layer of the metal is selectively etched from the sectioned surface, leaving the exposed nanotubes protruding from the surface. The extent of protrusion is at least twice the average diameter of the nanotubes, advantageously at least ten times the average diameter of the nanotubes.

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