Abstract:
A lateral field-emission device (10) has a lateral emitter (100) substantially parallel to a substrate (20) and has a simplified anode structure (70). The anode's top surface is precisely spaced apart from the plane of the lateral emitter and receives electrons emitted by field emission from the edge of the lateral emitter cathode, when a suitable bias voltage is applied. The device may be configured as a diode, or as a triode, tetrode, etc. having control electrodes (140) positioned to allow control of current from the emitter to the anode by an electrical signal applied to the control electrode.
Abstract:
A cold cathode field emission device comprising an electron emission layer (14), an insulating layer (13) and a gate electrode (12) which are laminated one on another with the insulating layer (13) positioned between the gate electrode (12) and the electron emission layer (14), and further comprising an opening portion (17) which penetrates through at least the insulating layer (13) and the electron emission layer (14), the electron emission layer (14) having an edge portion (14A) for emitting electrons, the edge portion (14A) being projected on a wall surface of the opening portion (17), and the electron emission layer (14) being connected to a power source through a resistance layer (23).
Abstract:
The invention concerns a field-emission cathode made of an electrically conducting material and having the shape of a narrow rod or a knife edge to ensure a high magnification of the electric field strength. The field-emission cathode is characterized in that at least part of the electron-emitting zone of the cathode includes preferably cylindrical host molecules and/or compounds with other host molecules and/or cylindrical atom networks, optionally with end-caps with a diameter in the nanometer range.
Abstract:
A field emission device (100) including a substrate (130), an emitter layer (106), a spacer layer (104) and a gate layer (102). In one preferred embodiment, the emitter layer (106) is made of a resistive material, and has a side end (120) that has an edge (122). The spacer layer (104) is on and over only a portion of the emitter layer (106) to expose the edge (122). The gate layer (102), on the spacer layer (104), also has a side end (128) that is tapered to form a wedge (129) with an edge. In one application, the device (100) is used in a flat panel display (90), with a screen (124). The screen (124) is at a selected positive voltage and is positioned above the gate layer (102). When a selected potential difference is applied between the emitter layer (106) and the gate layer (102), an electron-extraction field is established between the edge (132) of the gate layer (102) and the edge (122) of the emitter layer (106) to extract electrons from the edge (122) of the emitter layer (106). Then, the electrons are attracted to the screen (124). The wedge (129) reduces the amount of electrons collected at the gate and increases the efficiency of the device. The resistive nature of the emitter layer (106) enhances the uniformity of the electrons emitted along the edge (122) of the emitter layer (106).