Electron-emitting device and manufacturing method thereof

An electron-emitting device comprising:

• a cathode electrode;
• a layer electrically connected to the cathode electrode;
• and
• a plurality of particles, each comprising as a main component a material, which has resistivity lower than resistivity of a material of the layer, wherein,
• the plurality of particles are arranged in the layer;
• and
• a concentration of a main element of the particles with respect to a main element of the layer is 0.001 atm % or more and 1.5 atm % or less.

An electron-emitting device comprising:

• a cathode electrode;
• a layer electrically connected to the cathode electrode;
• and
• a plurality of particles, each comprising as a main component a material which has resistivity lower than resistivity of a material of the layer, wherein
• the plurality of particles are arranged in the layer;
• a density of the particles in the layer is 1×1014/cm3 or more and 5×1018/cm3 or less;
• and
• a concentration of a main element of the particles with respect to a main element of the layer is 0.001 atm % or more and 1.5 atm % or less.

An electron-emitting device comprising:

• a cathode electrode;
• a layer which is arranged on the cathode layer and contains carbon as a main component;
• and
• at least two particles which are arranged so as to be adjacent to each other in the layer and comprises metal as a main component, wherein
• one of the adjacent two particles is arranged to be nearer to the cathode electrode than the other particle;
• and
• the metal is metal selected from Co, Ni, and Fe.

An electron-emitting device comprising:

• a cathode electrode;
• and
• a layer connected to the cathode electrode, wherein
• a plurality of groups of particles, each group being constituted by at least two particles adjacent to each other, are arranged in the layer;
• each of the particles comprises as a main component a material which has resistivity lower than resistivity of a material of the layer,
• the adjacent two particles are arranged in a range of 5 nm or less;
• one of the adjacent two particles is arranged to be nearer to the cathode electrode than the other particle;
• and
• the plurality of groups of particles are arranged apart from each other by an average film thickness of the layer or more.

An electron-emitting device comprising:

• a cathode electrode;
• and
• a layer connected to the cathode electrode, wherein
• a plurality of groups of particles, each group being constituted by at least two particles which comprise metal as a main component and are adjacent to each other, are arranged in the layer;
• the layer comprises as a main component a material which has resistivity higher than resistivity of the particles;
• the adjacent two particles are arranged in a range of 5 nm or less;
• and
• one of the adjacent two particles is arranged to be nearer to the cathode electrode than the other particle.

An electron-emitting device comprising:

• a cathode electrode;
• and
• a layer which is connected to the cathode electrode and comprises carbon as a main component, wherein
• a plurality of groups of particles, each group being constituted by at least two particles which comprise metal as a main component and are adjacent to each other, are arranged in the layer;
• the plurality of groups of particles are arranged apart from each other by an average film thickness of the layer or more;
• and
• a concentration of the metal in the layer is lower on a surface side of the layer than on the cathode electrode side.

An electron-emitting device comprising:

• a cathode electrode;
• and
• a layer which is connected to the cathode electrode and comprises carbon as a main component, wherein
• a plurality of groups of particles constituted by at least two particles, which comprise metal as a main component, being adjacent to each other are arranged in the layer,
• one of the adjacent two particles is arranged on the cathode electrode than the other particle;
• and
• graphen is included between adjacent particles among at least part of the plurality of particles.

An electron-emitting device comprising:

• a cathode electrode;
• a layer which is electrically connected to the cathode electrode and comprises carbon as a main component;
• and
• a plurality of conductive particles arranged in the layer, each particle comprising carbon as a main component, wherein
• the layer contains a hydrogen element of 0.1 atm % or more with respect to a carbon element.