Back to results
US 7,582,001 B2Granted
Method for producing electron-emitting device and electron-emitting apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShin Kitamura, Takeo Tsukamoto
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorsShin Kitamura, Takeo Tsukamoto
Estimating the term…
A method for producing a durable electron-emitting device having a uniform electron emission characteristic, an electron source, and an image-forming apparatus having a uniform display characteristic for a long period are provided. The method for producing an electron-emitting device according to the present invention includes the steps of: disposing a cathode electrode on a surface of a substrate; providing an electrode opposite the cathode electrode; disposing plural pieces of fiber containing carbon as a main component on the cathode electrode; and applying potential higher than potential applied to the cathode electrode under depressurized condition to an electrode opposite the cathode electrode.
A method for producing an electron-emitting device, comprising the steps of:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Cold cathodes, e.g. field-emissive cathode: field-emissive cathodes
Nanotechnology for information processing, storage or transmission
Cold cathodes, e.g. field-emissive cathode: having an electric field parallel to the surface, e.g. thin film cathodes
Of cold cathodes: of field emission cathodes
Term ended 21 Sep 2022 (estimated)
1. Field of the Invention
The present invention relates to an electron-emitting device, an electron source using therewith, an image-forming apparatus, and a method for producing an electron-emitting device.
2. Related Background Art
FIGS. 1A, 1B, 1C, 1D and 1E show a method for producing an electron-emitting device according to the first embodiment;
FIGS. 2A and 2B show a step of equalizing the shapes of fine projections among the electron-emitting devices according to an embodiment of the present invention;
FIGS. 3A and 3B show an electron-emitting device according to the embodiment of the present invention;
The preferred embodiments of the present invention are described below in detail by referring to the attached drawings. However, the present invention is not limited to the dimensions, materials, shapes, and relative arrangements of the components of the embodiments unless otherwise specified.
Described first below is the equalizing process of the electron emission characteristic of an electron-emitting device.
According to the present invention, it is most desirable to use fibrous carbon as an electron-emitting member of an electron-emitting device. Since fibrous carbon has a very large aspect ratio, it easily enhances an electric field. Therefore, it is possible to emit an electron at a low voltage, and the fibrous carbon is recommended as an electron-emitting member according to the present invention.