| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance the jointing strength of a heater and a support, in an impregnated cathode structure. <P>SOLUTION: The impregnated cathode structure 1 includes a cathode substrate 10 in which an electron emitting substance is impregnated, a support 20, a heater 40 and an embedded material 50. The support 20 has a support outer cylinder 24 and a support inner cylinder 26, arranged coaxially with the support outer cylinder 24 in the cylinder of the support outer cylinder 24 so as to form a housing space 22 of ring shape between the support outer cylinder 24. The support 20 has the cathode substrate 10, installed at one end part of the support outer cylinder 24 and the support inner cylinder 26 and supports the cathode substrate 10. A projection portion 30, which projects from the end face of the support inner cylinder 26, is formed at the other end part of the support inner cylinder 26. The heater 40 is partially housed in the housing space 22, and one end part 44 is jointed to the projection portion 30 at the outside of the housing space 22. The embedded material 50 is filled in the housing space 22. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
