Patent ID: 7569837
Filing Date: 2009-08-04
Classification: H01J

Abstract:
1. An ion source, comprising: a cylindrical insulation tube, opened upward and opened at part of its lower surface: a magnetic field generating means, provided on the outer peripheral surface of said insulation tube; a gas supplying means for supplying gas into said insulation tube; a cathode electrode, at the tip end of which a fitting unit for fitting of a solid material thereto is formed, and which is arranged in the inner space of said insulation tube; an annular anode electrode, which is fitted to an opening in the lower surface of said insulation tube, to emit at its center ions generated in the inner space of said insulation tube; an upper frame, which blocks the upper portion of said insulation tube and suspends said cathode electrode so as to allow said fitting unit to approach said anode electrode; and a lower frame, in which an extraction port is formed for extracting ions emitted from said anode electrode, and on which said insulation tube is mounted.