Diamond film flat field emission cathode
AssigneeMicroelectronics and Computer Technology Corporation
InventorsNalin Kumar, Chenggang Xie
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Abstract
A field emission cathode for use in flat panel displays is disclosed comprising a layer of conductive material and a layer of amorphic diamond film, functioning as a low effective work-function material, deposited over the conductive material to form emission sites. The emission sites each contain at least two sub-regions having differing electron affinities. Use of the cathode to form a computer screen is also disclosed along with the use of the cathode to form a fluorescent light source.
Claims19
A field emission cathode, comprising:
- a layer of conductive material;
- and
- a layer of low work function material deposited over said conductive material, said low work function material having a relatively flat emission surface operable for emitting electrons in response to an applied electric field, wherein the low work function material comprises a mixture of graphite and diamond crystallites.
A field emission cathode, comprising:
- a layer of conductive material;
- and
- a layer of work function material deposited over said conductive material, said low work function material having a relatively flat emission surface operable for emitting electrons in response to an applied electric field, wherein the low work function material is amorphic diamond.
A field emission cathode, comprising:
- a layer of conductive material:
- and
- a layer of low work function material deposited over said conductive material, said low work function material having a relatively flat emission surface operable for emitting electrons in response to an applied electric field, wherein some of said low effective work function material is amorphic diamond.
A field emission cathode structure, comprising:
- a substrate;
- and
- a layer of low work function material deposited over said substrate, said low work function material having a relatively flat emission surface, wherein said low work function material is amorphic diamond.
The cathode structure as recited in claim 111, wherein said amorphic diamond comprises SP.sup.2 and SP.sup.3 crystallites.
Dependencies are inferred from the claim text.