ELECTRON GUN EMITTING UNDER HIGH VOLTAGE, IN PARTICULAR FOR ELECTRON MICROSCOPY

摘要

The invention relates to a field-emission electron gun comprising an electron emission tip, an extractor anode, as well as a means for creating an electric-potential difference between the emission tip and the extractor anode. The emission tip comprises a metal tip and an end cone produced by chemical vapour deposition on a nanofilament, the cone being aligned and welded onto the metal tip. The invention can be used for a transmission electron microscope.