Patent ID: 7880373

Claim:
A field emission electron source comprising: a substrate; and a plurality of electron emission members provided on the substrate, wherein each of the electron emission members comprises: a conductive body perpendicular to the substrate, the conductive body having a free end portion and a root portion contacting with the substrate, the free end portion having a top end surface and a lateral periphery surface below the top end surface around the free end portion, and the root portion being partially exposed; and an electron emission layer provided on and contacting the top end surface and the lateral periphery surface of the free end portion, the electron emission layer comprising a glass matrix, a plurality of carbon nanotubes, a plurality of metallic conductive particles and getter powders, wherein the carbon nanotubes, the metallic conductive particles and the getter powders are dispersed in the glass matrix; wherein in each of the electron emission members, the free end portion together with the electron emission layer has a diameter larger than that of the root portion; wherein the conductive body and the electron emission members are made of different materials.