FIG. 5A is a plan view of the embodiment and FIG. 5B is a sectional view taken along line A-A??? in FIG. 5A. Referring to FIGS. 5A and 5B, the embodiment comprises an insulator substrate 51, thin films 54 each having an electron-emitting region, Y-directional wires 55, X-directional wires 56 and insulation layers 57.