FIELD EMISSION TYPE ELECTRON SOURCE

摘要

PROBLEM TO BE SOLVED: To provide a field emission type electron source simplifying a display assembling process when used as an electron source of a display. SOLUTION: A strong electric field drift layer 6 is composed of a plurality of drift parts 6a formed of oxidized porous polycrystal silicon layers formed at the intersecting parts of lower electrodes 12a and surface electrodes 7, and separation parts 6b formed of polycrystal silicon layers which fill the spaces between the drift parts 6a. A ceramic board is used as an insulating board 11. The ceramic board is integrally formed with lower electrodes 12a and reinforcing spacers 11b projected in the thickness direction of the insulating board 11 from one surface so as to maintain the distance relative to a face plate 30 opposedly arranged with a space on one surface side of the insulating board 11, to a specified distance. Each reinforcing spacer 11b is formed in an orthogonal direction to the lower electrode 12a and projected to the face plate 30 side in the form of dividing the separation parts 6b of the strong electric field drift layer 6.