Electron-emitting device, electron source using the electron-emitting device, and image-forming apparatus using the electron source

An electron-emitting device comprising:

• a carbon film composed chiefly of carbon;
• and
• an electrode electrically connected to the carbon film,
• wherein silver is contained in the carbon film in a ratio of 10 mol % or less with respect to carbon.

An electron-emitting device comprising:

• a carbon film composed chiefly of carbon;
• and
• an electrode electrically connected to the carbon film,
• wherein silver is contained in the carbon film in a ratio of from 5 mol % to 10 mol % with respect to carbon.

An electron-emitting device comprising:

• a pair of electroconductors disposed on a substrate;
• and
• a pair of films connected to the pair of electroconductors, respectively, disposed with a gap therebetween and containing carbon as a main component,
• wherein silver is contained in said films in a ratio of 10 mol % or less with respect to carbon.

An electron-emitting device comprising:

• a pair of device electrodes disposed on a substrate;
• an electroconductive film connected to the pair of device electrodes and having a first gap between the pair of device electrodes;
• and
• a carbon film disposed in the first gap and on the electroconductive film, and having a second gap narrower in width than that of the first gap, within the first gap, and containing carbon as a main component,
• wherein silver is contained in the carbon film in a ratio of 10 mol % or less with respect to carbon.

An electron-emitting device comprising:

• a pair of device electrodes disposed on a substrate so as to face each other;
• an electroconductive film connected to the pair of device electrodes and having a first gap between the pair of device electrodes;
• and
• a carbon film disposed in the first gap on the electroconductive film, and having a second gap narrower in width than that of the first gap, within the first gap, and containing carbon as a main component,
• wherein silver is contained in the carbon film in a ratio of from 5 mol % to 10 mol % with respect to carbon.

An electron-emitting device comprising:

• a carbon film composed chiefly of carbon;
• and
• an electrode electrically connected to the carbon film,
• wherein silver is contained in the carbon film in a ratio of 5 mol % or more with respect to carbon.