Method of manufacturing electron beam emitter having an electron beam emitting axis coincided with crystal axis

摘要

An electron emitting source device made of crystal material has a cleavage plane and a plane perpendicular thereto. An electron beam to be emitted from the crystal material in parallel to the direction perpendicular to said cleavage plane. The crystal material has a first cutting plane which is substantially parallel to the cleavage plane and a second cutting plane which is substantially perpendicular to the first cutting plane.