Patent ID: 6344709
Filing Date: 2002-02-05
Classification: H01J

Abstract:
An electron gun having electrodes, which comprises:a first stepped metal cylinder 201 which is joined with cathode 200; a second metal cylinder 202 which is joined with said first stepped metal cylinder 201; a metal plate 221 which is joined with said second metal cylinder 202; an insulating cylinder 220 which is joined with said metal plate 221; a third metal cylinder 260 which is joined with the outer surface of said insulating cylinder 220; a fourth metal cylinder 210 which is joined with said third metal cylinder 260; a stepped insulating cylinder 250 which is joined with said fourth stepped metal cylinder 210; and a fifth metal cylinder 270 which is joined with said stepped insulating cylinder 250; wherein: said cathode 200 is a hot cathode; said fifth metal cylinder 270 is grounded electrically; and terminals for electrodes of said electron gun are extracted along the axis of said stepped insulating cylinder 250.