| 摘要 |
The electrode includes; a single outer wall(115) having a track shape rim(114) for forming a common opening, where three electron beams pass through, and a burring part(116) disposed in the opposite direction of the facing plane from the rim; a static electric control electrode(104) which is arranged to be recessed a certain distance from the outer wall, and has more than one curved plane; and a center opening(105) for enclosing center electron beam so as to improve manufacturing process by simplifying a shape of the static electric control electrode.
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