Field emission cathode arrays of planar-gate-type triodes are fabricated on the glass substrate by magnetron sputtering,conventional photolithography and chemical wet etching.The carbon nanotube(CNT) emitters were deposited on the cathode by electrophoretic deposition.The cathode plate and anode plate were packaged into a 51-cm monochrome field emission display(FED) with planar-gate-type triode,which is applied for 49-cm liquid crystal display(LCD) as backlight unit and its field emission charac...