Method for manufacturing cathode, electron source, and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasato Minami, Takashi Iwaki
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Abstract
A method for manufacturing a cathode comprises the steps of: a process for applying onto a substrate a fluid mixture comprising polymers or precursors to the polymers, fine particles of electroconductive material or organic metal compound, and solvent; a process for removing the solvent by heating the fluid mixture applied on the substrate, thereby obtaining an electroconductive organic film comprising the polymers and the electroconductive material; and a process for forming a gap at a portion of the electroconductive organic film by applying an electrical current thereto. Accordingly, a simple method for manufacturing cathodes, electron sources, and image forming apparatuses with excellent electron emitting properties can be realized.
Claims8
A method for manufacturing a cathode, comprising the steps of:
- (A) a step of forming a pair of electrodes on a substrate;
- (B) a step of forming a film comprising a polymer so that the film connects the pair of electrodes;
- and
- (C) a step of forming a gap at the film and of forming first and second portions including at least one of amorphous carbon and graphite, which are formed by carbonizing the polymer, at a portion of the film,
- wherein the gap, and the first and second portions are formed substantially simultaneously by applying a voltage between the electrodes, and wherein the first and second portions are adjacent to the gap and oppose one another on opposite sides of the gap.
Dependencies are inferred from the claim text.