Field emission device with ground electrode
AssigneeElectronics and Telecommunications Research Institute
InventorsJin Woo Jeong, Yoon Ho Song, Jun Tae Kang, Jae Woo Kim
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Abstract
Provided herein is a field emission device. The field emission device includes a cathode which is connected to a negative power supply and emits electrons, an anode which is connected to a positive power supply and includes a target material receiving the electrons emitted from the cathode, and a ground electrode which is formed to face the anode and has an opening through which the electrons emitted from the cathode pass. The ground electrode is grounded so that when an arc discharge occurs due to high voltage operation of the anode, electric charge produced by the arc discharge is emitted to a ground.
Claims14
A field emission device comprising:
- a cathode connected to a negative power supply and emitting electrons;
- an anode connected to a positive power supply and receiving the electrons emitted from the cathode;
- a plurality of gate electrodes facing the anode and having an opening through which the electrons emitted from the cathode pass, the plurality of gate electrodes including a top gate electrode and a plurality of sub-gate electrodes between the top gate and the cathode;
- an N-type metal-oxide-semiconductor field-effect transistor (MOSFET) connected between the cathode and the negative power supply, the N-type MOSFET having a source connected to the negative power supply;
- and
- a control signal source connected to a gate of the N-type MOSFET, the control signal source providing a control signal to the gate of the N-type MOSFET and controlling a current of the cathode,
- wherein the top gate electrode is selectively grounded, and
- wherein the control signal source comprises a first end connected to the gate of the N-type MOSFET, and a second end directly connected to the negative power source.
Dependencies are inferred from the claim text.