Lowe, Price, Leblanc, Becker & Shur
Cathode for electron tube and manufacturing method thereof
 A cathode for an electron tube in accordance with the present invention comprises: a base (2) containing not only nickel as a major element but also a reducing agent; a layer (3) of an electron-emissive substance which is applied to the base (2) and contains not only an alkaline earth metal oxide as a principal component but also a scandium oxide; and a heater for heating the layer (3). 
Mitsubishi Denki Kabushiki Kaisha
H H
H01J H01J
inventional inventional
Keiji Keiji Kinjiro Masato Toyokazu
Fukuyama Watanabe Sano Saito Kamata