Electron-emitting cold cathode device

An electron-emitting cold cathode device, comprising:

• a cathode electrode that lies on a cathode plane and includes, in an active region, a cathode fingered structure comprising one or more cathode straight-finger-shaped terminals, each with a respective main extension direction substantially parallel to a first reference direction;
• for each cathode straight-finger-shaped terminal, one or more respective electron emitters formed on, and in ohmic contact with, the cathode straight-finger-shaped terminal, each electron emitter having a respective main extension direction substantially perpendicular to the cathode plane;
• and
• a gate electrode that lies on a gate plane substantially parallel to, and spaced apart from, the cathode plane, does not overlap the cathode electrode and includes, in the active region, a gate fingered structure comprising two or more gate straight-finger-shaped terminals, each with a respective main extension direction substantially parallel to the first reference direction, the two or more gate straight-finger-shaped terminals being interlaced with the one or more cathode straight-finger-shaped terminals and are designed to modulate an electron beam emitted, in use, by the one or more respective electron emitters.