Patent ID: 7722424

Claim:
A method of manufacturing an electron emitter in which electrons are emitted from an electron emission portion formed in a first conductive film, the method comprising: forming the first conductive film in a pattern on a substrate by the use of a droplet jetting method; selectively removing a part of the first conductive film; forming the electron emission portion in the first conductive film, wherein the removing of a part of the first conductive film includes: forming a first dummy functional film in a pattern on the first conductive film by the use of the droplet jetting method; and etching an exposed portion of the first conductive film by using the first dummy functional film as a mask; forming a second dummy functional film on the first conductive film; forming a second conductive film partially overlapping the second dummy functional film and the first conductive film; and removing the second dummy functional film to form a gap between the first conductive film and the second conductive film, wherein the gap includes the electron emission portion.