Electric lamp and discharge devices – Electrode and shield structures – Point source cathodes
Patent
1997-01-13
1998-10-27
O'Shea, Sandra L.
Electric lamp and discharge devices
Electrode and shield structures
Point source cathodes
313309, 313310, 313351, 3151691, 3151692, 3151693, 3151694, 445 24, 445 50, H01J 102
Patent
active
058281630
ABSTRACT:
A field emitter device includes a column conductor, an insulator, and a resistor structure for advantageously limiting current in a field emitter array. A wide column conductor is deposited on an insulating substrate. An insulator is laid over the column conductor. A high resistance layer is placed on the insulator and is physically isolated from the column conductor. The high resistance material may be chromium oxide or 10%-50% wt % Cr+SiO. A group of microtip electron emitters is placed over the high resistance layer. A low resistance strap interconnects the column conductor with the high resistance layer to connect in an electrical series circuit the column conductor, the high resistance layer, and the group of electron emitters. One or more layers of insulator and a gate electrode, all with cavities for the electron emitters, are laid over the high resistance material. One layer of insulator is selected from a group of materials including SiC, SiO, and Si.sub.3 N.sub.4. An anode plate is attached with intermediate space between the anode plate and the microtip electron emitters being evacuated.
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Boysel R. Mark
Costa Michael J.
Ho Joseph K.
Jones Gary W.
Jones Susan K.
FED Corporation
Gerike Matthew J.
O'Shea Sandra L.
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