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AssigneeSamsung Display Devices Co., Ltd.
InventorsKyu-nam Joo, Jong-seo Choi, Kwi-seuk Choi, Geun-bae Kim, Sang-won Lee
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A cathode for an electron tube includes a base metal containing nickel as a major component and an electron-emissive material layer which is formed on the base metal and comprises an alkaline earth metal oxide including barium oxide as its main component, wherein the electron-emissive material layer further comprises a lanthanum-magnesium-manganese oxide. The cathode of the present invention is fully interchangeable with conventional oxide cathodes and has a longer lifetimes and an improved cut-off drift characteristic.
A cathode for an electron tube comprising a base metal containing nickel as a major component and an electron-emissive material layer provided on said base metal and comprising an alkaline earth metal oxide including barium oxide as its main component, wherein said layer further comprises a lanthanum-magnesium-manganese oxide.
Dependencies are inferred from the claim text.