Electron emission device and display device using the same

Details Electron emission device and display device using the same Electron emission device and display device using the same

1998-03-20

1999-11-23

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Discharge devices having a thermionic or emissive cathode

313309, 445 46, 445 51, H01J 105

Patent

active

059906057

ABSTRACT:
An electron emission device includes: a semiconductor layer; a porous semiconductor; and a thin-film metal electrode which are layered in turn. The electrode faces a vacuum space. The porous semiconductor layer has at least two or more of porosity-changed layers which have porosities which are different from each other in the thickness direction. The electron emission device emits electrons when an electric field is applied between the semiconductor layer and the thin-film metal electrode. An insulator layer made of a material selected from silicon oxide or silicon nitride may be formed between the porous semiconductor layer and the thin-film metal electrode. Si skeletons of the porous semiconductor layer are oxidized or nitrided.

REFERENCES:
patent: 5652474 (1997-07-01), Wilshaw et al.
patent: 5894189 (1999-04-01), Ogasawara et al.

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