Abstract:
A field emitter cell (10) includes a thin film emitter (22) normal to the gate layer (18). The field emitter cell (10) may include a conductive substrate layer (12), and insulator layer (16) having a perforation (30), a gate layer (18) having a perforation, an emitter layer (22), and other optional layers. The perforation in the gate layer (18) is larger and concentrically offset with respect to the perforation (30) in the insulating layer (16) and may be of a tapered construction. Alternatively, the perforation of the gate layer (18) may be coincident, or larger or smaller than, the perforation (30) in the insulating layer (16), provided that the gate layer (18) is shielded from the emitter (22) from a direct line-of-sight by a nonconducting standoff layer. Optionally, the thin-film-edge emitter (22) may include incorporated nanofilaments (50). The field emitter cell (10) has a low gate current, useful for various applications such as field emitter displays, high voltage power switching, RF amplification and other applications that require high emission currents.
Abstract:
A field emitter cell includes a thin-film-edge emitter normal to the gate layer. The field emitter cell may include a conductive substrate layer, an insulator layer having a perforation, a gate layer having a perforation, an emitter layer, and other optional layers. The perforation in the gate layer is larger and concentrically offset with respect to the perforation in the insulating layer and may be of a tapered construction. Alternatively, the perforation in the gate layer may be coincident with, or larger or smaller than, the perforation in the insulating layer, provided that the gate layer is shielded from the emitter from a direct line-of-sight by a nonconducting standoff layer. Optionally, the thin-film-edge emitter may include incorporated nanofilaments. The field emitter cell has low gate current, useful for various applications such as field emitter displays, high voltage power switching, RF amplification and other applications that require high emission currents.
Abstract:
An electron emitting device comprising a first electrode (2) and an electron emitting part (24) provided on the first electrode (2) and constituted of particles or their aggregates (3), the particles (3) containing a carbonaceous material which has a carbon six-membered ring structure and contains, for example, graphite or carbon nanotube as its main component.
Abstract:
A field-emission electron source which comprises a field-emission electron source part formed on a p-type silicon substrate (1) and an n-channel field-effect transistor part formed on the p-type silicon substrate (1) in a position corresponding to the field-emission electron source part and in which the field-emission electron source part is provided in the drain region of the field-effect transistor part, and the field-emission current from the field-emission source part is controlled by a control voltage applied to the gate electrode (8) of the field-effect transistor part, wherein the drain region includes at least two wells (3, 4) with different impurity concentrations, the well (4) having the lower impurity concentration is provided at an end part of the drain region provided in contact with the channel region of the field-effect transistor part.
Abstract:
A charge dissipation field emission device (200, 300, 400) includes a supporting substrate (210, 310, 410), a cathode (215, 315, 415) formed thereon, a dielectric layer (240, 340, 440) formed on the cathode (215, 315, 415) and having emitter wells (260, 360, 460) and a charge dissipation well (252, 352, 452, 453) exposing a charge-collecting surface (248, 348, 448, 449); for bleeding off gaseous positive charge generated during the operation of the charge dissipation field emission device (200, 300, 400), an electron emitter (270, 370, 470) formed in each of the emitter wells (260, 360, 460), and an anode (280, 380, 480) spaced from the dielectric layer (240, 340, 440) for collecting electrons emitted by the electron emitters (270, 370, 470).