CATHODE STRUCTURE WITH NANOTUBES FOR EMISSIVE SCREEN

摘要

This invention relates to a triode type cathode structure comprising a cathode conductor ( 22 ), an electrical insulation layer ( 24 ) and a grid electrode ( 25 ), superposed on a support ( 21 ), the electrical insulation layer and the grid electrode comprising openings exposing at least one electron emitting element, electrically connected to the cathode conductor ( 22 ) and comprising nanotubes ( 28 ) made of an electron emitting material. The cathode structure comprises protective means preventing the longest nanotubes from coming into contact with the grid electrode ( 25 ).