| 摘要 |
A lighting device includes a cathode ( 11 ), a cover ( 12 ), an insulation layer ( 13 ), an emitter base ( 18 ), a niobium tip ( 19 ), a phosphor layer ( 15 ), an anode ( 16 ) and a silicon oxide layer ( 17 ). The cover is formed on the cathode. The insulation layer is formed on the cover. The emitter base is formed on the insulation layer. The niobium tip is formed on the emitter base. The phosphor layer is formed above the niobium tip. The anode is formed on the phosphor layer. The silicon oxide layer is formed on the anode. Each of the niobium tips may be closely combined with the emitter base. The combined niobium tips and the emitter base may be subjected to relatively high voltage electrical fields without being damaged.
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