| 摘要 |
<p>PURPOSE:To enhance the attachment strength to an Au layer and enable electron emission-inhibiting action to be maintained for a long period of time, by coating the surface of an electrode substrate made of high melting point-materials with plural sets of Ni layers and Au layers alternately arranged and dispersed mutually wherein said electrode substrate is a Wenelt electrode. CONSTITUTION:A wenelt electrode 3 is installed on the side between the cathode and the anode which are disposed facing to each other. The surface of an electrode substrate body 4 which is a welnelt electrode 3 made of high melting point-metals such as Mo, W, or the like is coated with plural sets of alternately arranged Ni layers 5 and Au layers 6. In this case, for instance, the thickness of the Ni layer is set to 0.1-0.3mum and that of Au layer is set to 1-5mum. Accordingly, electron emission-inhibiting action to the anode can be maintained for a long period of time.</p> |
