A double-grid controlled cold cathode electron gun and a preparation method thereof
A double gate control, electron gun technology, applied in cold cathodes, discharge tube electron guns, electron/ion guns of transit time electron tubes, etc. life and other issues, to achieve the effect of weakening the electrostatic shielding effect, avoiding processing burrs, and achieving good consistency
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[0049] Such as Figure 1~6 As shown, the double grid controlled cold cathode electron gun provided in this embodiment includes an electron gun insulating shell, an annular electrode piece 2, a cathode base 3, a cathode substrate 4, a tubular insulating connector 5, a cathode grid 6, an outer Set the grid 7 and the tube-type focusing pole 8, wherein the inside of the electron gun insulating shell is vacuum and is composed of a lower sleeve 101 and an upper sleeve 102, and the annular electrode sheet 2 is arranged on the lower sleeve 101 Between the upper sleeve 102, the cathode base 3 has a two-stage stepped column structure and seals the lower port of the lower sleeve 101, and the cathode substrate 4 has a column structure and has a The cold cathode material layer 401, the inner cavity of the tubular insulating connecting body 5 has a two-stage stepped columnar structure.
[0050] Such as Figure 1~3 As shown, in the structure of the double grid control type cold cathode ele...
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