Abstract:
PURPOSE: A needle shaped electric field emission electronic beam emitter and a manufacturing method thereof are provided to enlarge an electric field by using a needle shaped cathode substrate and a carbon nano-tube. CONSTITUTION: Carbon nano-tube paste is manufactured by mixing a carbon nano-tube, a sintering binder(23), and an evaporable solvent(24). The viscosity of the carbon nano-tube paste is 0.5 to 10000cP. The carbon nano-tube paste coats a needle shaped cathode substrate. The needle shaped cathode substrate in which the carbon nano-tube paste is coated is dried and sintered. A caliber of the carbon nano-tube is 1 to 50nm. A paste bearing substrate(11) is separated from the needle shaped cathode substrate.
Abstract:
PURPOSE: A small vacuum sealed X-ray tube using an electronic beam emitter based on carbon nanotube is provided to solve the X-ray output, X-ray generation reaction speed, power consumption, and microminiaturization limits of an existing thermal electron beam source by using an electron beam source of a carbon nanotube cold-type field emission type. CONSTITUTION: An electron beam generator (200) includes a focusing electrode (130) formed in a cylindrical shape. The electron beam generator emits electronic beam through a carbon nanotube electronic beam emitter (110) which is inserted into the center of the focusing electrode. A ceramic tube (160) functions as an insulator for blocking a high voltage. An X-ray target (180) comprises an X-ray transmission window (150) for radiating ionizing radiation into the atmosphere and an X-ray target layer (140). A connection anode (170) is provided between the X-ray target and the ceramic tube.
Abstract:
PURPOSE: A manufacturing method of carbon nanotube electric field emission electronic beam emitter using metallic binder and a carbon nanotube electric field emission electronic beam emitter using the same are provided to improve wettability with a substrate by forming a wire mesh structure. CONSTITUTION: Carbon nanotubes are refined (S110). The refined carbon nanotubes melt in an evaporable solution (S120). The carbon nanotube solution and metallic binders are mixed. A carbon nanotube paste is manufactured through the mixing process (S130). A cathode substrate is ground through a mechanical and chemical process (S140). [Reference numerals] (AA) Fifth step where the carbon nanotube paste is coated on the cathode substrate by binding it to a paste support substrate in the form of liquid drops; (BB) Sixth step where the carbon nanotube paste-coated cathode substrate is dried and sintered at high temperature; (S110) First step where carbon nanotubes are refined; (S120) Second step where the refined carbon nanotubes melt in an evaporable solution; (S130) Third step where a carbon nanotube paste is manufactured through the mixing process; (S140) Fourth step where a cathode substrate is ground through a mechanical and chemical process