Field emission device having spherically curved electron emissio

Details Field emission device having spherically curved electron emissio Field emission device having spherically curved electron emissio

1997-10-17

2000-02-22

Patel, Vip

Electric lamp and discharge devices

Discharge devices having a thermionic or emissive cathode

313309, 313336, 313351, 313495, H01J 102

Patent

active

060283912

ABSTRACT:
There is provided a field emission thin film cold cathode including a substrate, an electron-emission layer formed on the substrate and having a spherical surface or a curved surface approximated to a spherical surface recessed into the substrate, a first electrode disposed about the electron-emission layer and having a greater height from the substrate than the electron-emission layer, an electrically insulating layer formed on the first electrode, and a second electrode formed on the electrically insulating layer. The electron-emission layer may be made of monocrystalline diamond, polycrystalline diamond or amorphous diamond. The above-mentioned field emission thin film cold cathode provides an electron source which makes it no longer necessary to fabricate a micro-structured device, can be fabricated without a lithography apparatus having a high accuracy, and has a small current modulating voltage.

REFERENCES:
C.A. Spindt, "A Thin-Film Field-Emission Cathode", J. Applied Physics, vol. 39, No. 7, Jun. 1968, pp. 3504-3505.
R. Meyer, "Recent Development on "Microtips" Display at LETI", Technical Digest IVMC 91, Nagahama 1991, pp. 6-9.
N. Kumar et al., "Development of Nano-Crystalline Diamond-Based Field-Emission Displays", SID 94 Digest, pp. 43-46.

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