| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cathode radiator enhancing the control or the life of a cathode in an inexpensive method by solving problems that thickness is thin, the amount of usable electron emission material is regulated, the life of a cathode is regulated, life depends on the evaporation rate of barium, control of the cathode is damaged when the counter cathode is cooled, and radiation distribution on the cathode radiation surface is made uneven by ion bombardment. <P>SOLUTION: The cathode radiator used for an electron embedded cathode comprises a porous matrix in which the electron emission material is embedded, is defined with an outer surface constituted of the radiation surface, and has the outer surface containing a side surface having a roughness of 0.2 μm or less. <P>COPYRIGHT: (C)2004,JPO |
