Metal cathode for electron tube
申请公布号:US2002101146(A1)
申请号:US20010950777
申请日期:2001.09.13
申请公布日期:2002.08.01
发明人:KIM YOON-CHANG;JOO KYU-NAM;SEO DONG-KYUN;SIN BU-CHUL
分类号:H01J1/20;(IPC1-7):H01J1/14
主分类号:H01J1/20
摘要:An indirectly heated metal cathode for an electron tube includes a metal sleeve of an Mo material, a metal emitter disposed on the metal sleeve and including Pt or Pd as a main component; and a buffer layer between the metal sleeve and the metal emitter. The buffer layer prevents Mo, an element of the metal sleeve, from diffusing into the emitter during the operation of the metal cathode so that electron-emitting performance does not decrease rapidly with operating time due to an increase in a work function. Therefore, the metal cathode satisfies a long life span requirement for large scale and high definition electron tubes.
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