Patent ID: 6188167
Filing Date: 2001-02-13
Classification: H01J

Abstract:
A micro-field emission gun comprising:a substrate;an emitter provided on a surface of said substrate, said emitter emitting electrons in response to a gate electric field applied thereto;a first insulation layer provided on said surface of said substrate, said first insulation layer carrying thereon a first penetrating hole in alignment with said emitter as a passage of said electrons;a gate electrode layer provided on a surface of said first insulation layer, said gate electrode carrying thereon a first opening in alignment with said first penetrating hole and acting as a passage of said electrons, said gate electrode being applied with a gate voltage and creating said gate electric field in response thereto;a second insulation layer provided on a surface of said gate electrode layer and carrying a second penetrating hole in alignment with said first opening as a passage of said electrons, said second insulation layer having a thickness greater than 10 .mu.m; andan acceleration electrode layer provided on a surface of said second insulation layer, said acceleration electrode layer carrying a second opening in alignment with said second penetrating hole as a passage of said electrons, said acceleration electrode layer being applied with an acceleration voltage for accelerating said electrons,wherein said second insulation layer comprises a glass containing cations.