PURPOSE: To provide a display device using electron beams Which is excellent in life characteristic by constituting a holder for linear cathode from a metal base and an electric insulating layer of crystallized hyaline in which at least a MgO crystal phase is precipitated on the metal base.
CONSTITUTION: A flat type image display device has linear beam sources 3, electron beam taking means 5, 6, 7, an electron beam control means 8, electron beam polarizing means 9, 10, and a light emitting means 11. A linear cathode holder 4 for fixing and positioning the linear beam sources 3 arranged in a plurality of lines is formed of an electric insulating base, and the electric insulating base is formed of a metal base 12 and an electric insulating layer 14 of crystallized hyaline in which at least a MgO crystal phase is precipitated on the metal base 12.
MIZUNO YASUO
HANDA HARUHIKO
YOSHIDA AKIHIKO
