Patent ID: 8295440
Filing Date: 2012-10-23
Classification: H01J

Abstract:
1. A super miniature X-ray tube using a nano material field emitter, comprising: a tip-type cathode electrode comprising the nano material field emitter formed on one end with a planar section thereof to generate an electron beam; a gate and focusing electrode formed in a hollow cylindrical shape and surrounding an outer circumference of the cathode electrode, the gate electrode comprising a tapered portion formed on one end and inclined from inside to outside, the gate electrode receiving a voltage for generating the electron beam; a high voltage insulating portion formed in a hollow cylindrical shape and surrounding an outer circumference of the gate electrode; an anode electrode formed at a predetermined distance from one end of the high voltage insulating portion and receiving an acceleration voltage to accelerate an electron beam generated at the cathode electrode; and an electric field adjusting electrode formed between the high voltage insulating portion and the anode electrode to vary a pattern of an acceleration electric field, wherein the anode electrode comprises an open portion formed on one side to receive therein the electric field adjusting electrode, and an X-ray generating portion formed on the other side to generate an X-ray by a collision of an accelerated electron beam.