| 摘要 |
<p>An electron tube cathode and a method for manufacturing the same are hereby provided. In the electron tube, the fine uneven portion is formed on one of the surfaces of the base by electrochemical etching in a single electrochemical bath. Reducing metal is coated only on the convex portion of the uneven portion by electro-plating. Then, the sleeve of the cathode is welded to the base. Alternatively, before the sleeve of the cathode is welded to the base, the porous reducing metal layer may be formed on one of the surfaces of the base by electro-plating in a single electrochemical bath. By means of the method, the fine uneven portion and porous reducing metal layer can be easily and uniformly formed on the base.</p> |
