Field emission cathode and field emission device
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsBing-Chu Du, Peng Liu, Duan-Liang Zhou, Chun-Hai Zhang, Shou-Shan Fan
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Abstract
The disclosure relates to a field emission cathode. The field emission cathode includes a microchannel plate, a cathode electrode and a number of cathode emitters. The microchannel plate is an insulative plate and includes a first surface and a second surface opposite to the first surface. The microchannel plate defines a number of holes extending through the microchannel plate from the first surface to the second surface. The cathode electrode is located on the first surface. The number of cathode emitters are filled in the number of holes and electrically connected with the cathode electrode.
Claims20
A field emission cathode, comprising:
- a microchannel plate, wherein the microchannel plate is an insulative plate and comprises a first surface and a second surface, opposite to the first surface;
- and the microchannel plate defines a plurality of holes extending through the microchannel plate the from the first surface to the second surface;
- and the microchannel plate is a free-standing structure;
- a cathode electrode located on the first surface;
- and
- a plurality of cathode emitters, wherein the plurality of cathode emitters are filled in the plurality of holes and electrically connected with the cathode electrode.
A field emission cathode, comprising:
- a first microchannel plate, wherein the first microchannel plate is an insulative plate and comprises a first surface and a second surface, opposite to the first surface;
- and the first microchannel plate defines a plurality of first holes extending through the first microchannel plate the from the first surface to the second surface;
- a second microchannel plate located on the first surface, wherein the second microchannel plate defines a plurality of second holes extending through the second microchannel plate and aligned with the plurality of first holes;
- and each of the first microchannel plate and the second microchannel plate is a free-standing structure;
- a cathode electrode located on the second surface;
- and
- a plurality of cathode emitters, wherein the plurality of cathode emitters are filled in the plurality of first holes and electrically connected with the cathode electrode.
A field emission device, comprising:
- an anode substrate, a cathode substrate spaced from the anode substrate, an anode structure located on the anode substrate and a field emission cathode located on the cathode substrate and spaced from the anode structure;
- wherein the field emission cathode comprises:
- a microchannel plate, wherein the microchannel plate is an insulative plate and comprises a first surface and a second surface, opposite to the first surface;
- and the microchannel plate defines a plurality of first holes extending through the microchannel plate the from the first surface to the second surface;
- and the microchannel plate is a free-standing structure;
- a cathode electrode located on the first surface;
- and
- a plurality of cathode emitters, wherein the plurality of cathode emitters are filled in the plurality of first holes and electrically connected with the cathode electrode.
Dependencies are inferred from the claim text.