Electron emitter and method of fabricating electron emitter
First Claim
1. An electron emitter comprising:
- an emitter layer formed of a dielectric material;
a first electrode provided on or above a first surface of the emitter layer and having an opening portion with an opening formed therein; and
a second electrode provided on or above a second surface of the emitter layer opposite the first surface;
the emitter layer emitting electrons through the opening when a drive voltage is applied between the first electrode and the second electrode, wherein the first electrode is configured and disposed such that a surface of the opening portion facing the first surface of the emitter layer is apart from the first surface, and the opening portion has an inner edge surrounding the opening, and has a shape which causes lines of electric force to concentrate at the inner edge.
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Accused Products
Abstract
An electron emitter includes an emitter layer formed of a dielectric material, an upper electrode, and a lower electrode. A drive voltage is applied between the upper electrode and the lower electrode, for emitting electrons. The upper electrode is formed of scale-like conductive particles on the upper surface of the emitter layer and has a plurality of opening portions. The surfaces of overhanging portions of the opening portions that face the emitter layer are apart from the emitter layer. The overhanging portions each have such a cross-sectional shape as to be acutely pointed toward the inner edge of the opening portion, or the tip end of the overhanging portion, so that lines of electric force concentrate at the inner edge.
18 Citations
17 Claims
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1. An electron emitter comprising:
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an emitter layer formed of a dielectric material;
a first electrode provided on or above a first surface of the emitter layer and having an opening portion with an opening formed therein; and
a second electrode provided on or above a second surface of the emitter layer opposite the first surface;
the emitter layer emitting electrons through the opening when a drive voltage is applied between the first electrode and the second electrode, wherein the first electrode is configured and disposed such that a surface of the opening portion facing the first surface of the emitter layer is apart from the first surface, and the opening portion has an inner edge surrounding the opening, and has a shape which causes lines of electric force to concentrate at the inner edge. - View Dependent Claims (2, 3, 4, 5)
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6. An electron emitter comprising:
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an emitter layer formed of a dielectric material;
a first electrode provided on or above a first surface of the emitter layer and having an opening portion with an opening formed therein; and
a second electrode provided on or above a second surface of the emitter layer opposite the first surface;
the emitter layer emitting electrons through the opening when a drive voltage is applied between the first electrode and the second electrode, wherein the first electrode is formed of an aggregation of conductive particles, each having an elongated cross section, which are disposed on or above the emitter layer such that the longitudinal direction of the cross section extends along the first surface, and the opening portion is formed by peripheral edge portions of the conductive particles. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of fabricating an electron emitter which comprises an emitter layer formed of a dielectric material, a first electrode provided on or above a first surface of the emitter layer and having an opening portion with an opening formed therein, and a second electrode provided on or above a second surface of the emitter layer opposite the first surface, the emitter layer emitting electrons through the opening when a drive voltage is applied between the first electrode and the second electrode, the method comprising:
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preparing a paste composed of a dispersion medium, and conductive particles dispersed in the dispersion medium and having an elongated cross section;
forming a film of the paste on or above the first surface of the emitter layer; and
sintering the film to thereby form the first electrode. - View Dependent Claims (17)
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Specification