Processing of materials for uniform field emission

Details Processing of materials for uniform field emission Processing of materials for uniform field emission

1996-02-27

1999-01-12

Bradley, P. Austin

Electric lamp or space discharge component or device manufacturi

Process

With start up, flashing or aging

445 51, 427540, H01J 944

Patent

active

058578820

ABSTRACT:
This method produces a field emitter material having a uniform electron emitting surface and a low turn-on voltage. Field emitter materials having uniform electron emitting surfaces as large as 1 square meter and turn-on voltages as low as 16V/.mu.m can be produced from films of electron emitting materials such as polycrystalline diamond, diamond-like carbon, graphite and amorphous carbon by the method of the present invention. The process involves conditioning the surface of a field emitter material by applying an electric field to the surface, preferably by scanning the surface of the field emitter material with an electrode maintained at a fixed distance of at least 3 .mu.m above the surface of the field emitter material and at a voltage of at least 500V. In order to enhance the uniformity of electron emission the step of conditioning can be preceeded by ion implanting carbon, nitrogen, argon, oxygen or hydrogen into the surface layers of the field emitter material.

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