a flat panel display includes a substrate , a front glass , a cathode , a gate electrode , a plurality of front ribs , a phosphor film and a metal - backed film , and a gate rib . the front glass is arranged to oppose the substrate and forms a vacuum envelope together with the substrate . the front glass is transparent at least partially . the cathode is arranged on the substrate . the gate electrode is arranged between the substrate and front glass and includes an electron - passing hole through which an electron emitted from the cathode passes . the front ribs extend vertically at a predetermined interval from the front glass toward the gate electrode . the phosphor film and metal - backed film are stacked on a region of the front glass which is sandwiched by the front ribs . the gate rib extends vertically from the gate electrode toward the front glass and is in contact with the front ribs . a gate electrode structure and a gate electrode structure manufacturing method are also disclosed .