Electron emitter, drive circuit of electron emitter and method of driving electron emitter
First Claim
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1. An electron emitter comprising:
- an emitter section made of a dielectric material;
a first electrode disposed in contact with said emitter section; and
a second electrode disposed in contact with said emitter section and cooperating with said first electrode in providing a slit;
wherein electrons are emitted from said emitter section by reversing the polarization of at least a portion of said emitter section which is exposed through said slit under a drive voltage applied between said first electrode and said second electrode;
said slit having a width ranging from 0.1 μ
m to 50 μ
m.
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Abstract
An electron emitter has an emitter section formed on a substrate, a cathode electrode formed on one surface of the emitter section, and an anode electrode formed on the same one surface of the emitter section and cooperating with the cathode electrode in providing a slit. A pulse generation source applies a drive voltage between the cathode electrode and the anode electrode. The anode electrode is connected to GND (ground). The slit has a width in the range from 0.1 μm to 50 μm.
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Citations
36 Claims
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1. An electron emitter comprising:
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an emitter section made of a dielectric material;
a first electrode disposed in contact with said emitter section; and
a second electrode disposed in contact with said emitter section and cooperating with said first electrode in providing a slit;
wherein electrons are emitted from said emitter section by reversing the polarization of at least a portion of said emitter section which is exposed through said slit under a drive voltage applied between said first electrode and said second electrode;
said slit having a width ranging from 0.1 μ
m to 50 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A drive circuit for energizing an electron emitter comprising:
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an emitter section made of a dielectric material;
a first electrode disposed in contact with said emitter section; and
a second electrode disposed in contact with said emitter section and cooperating with said first electrode in providing a slit;
wherein electrons are emitted from said emitter section by reversing the polarization of at least a portion of said emitter section which is exposed through said slit under a drive voltage applied between said first electrode and said second electrode;
said drive circuit comprising a capacitor connected in series to said electron emitter. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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14. A drive circuit for energizing an electron emitter comprising:
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an emitter section made of a dielectric material;
a first electrode disposed in contact with said emitter; and
a second electrode disposed in contact with said emitter section and cooperating with said first electrode in providing a slit;
wherein electrons are emitted from said emitter section by reversing the polarization of at least a portion of said emitter section which is exposed through said slit under a drive voltage applied between said first electrode and said second electrode;
said drive circuit comprising a current-suppressing resistive element connected in series to said electron emitter. - View Dependent Claims (15, 16, 17)
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- 27. A method of driving an electron emitter having an emitter section made of a dielectric material, a first electrode formed in contact with said emitter section, and a second electrode formed in contact with said emitter section, with a slit defined between said first electrode and said second electrode, said method comprising repeating a step which comprises a preparatory period in which a first voltage is applied between said first electrode and said second electrode such that said first electrode has a potential higher than a potential of said second electrode to polarize said emitter section and an electron emission period in which a second voltage is applied between said first electrode and said second electrode such that said first electrode has a potential lower than a potential of said second electrode to reverse the polarization of said emitter section for emitting electrons.
Specification