CATHODE BODY STRUCTURE, ELECTRON GUN BODY STRUCTURE, GRID UNIT FOR ELECTRON GUN, ELECTRONIC TUBE, HEATER, AND METHOD FOR MANUFACTURING CATHODE BODY STRUCTURE

摘要

A cathode assembly (27) includes a thermally conductive insulating substrate (21) having a pair of opposing surfaces. A cathode base member (24) is formed on one surface of the insulating substrate, and a heating member (25) for heating the cathode base member is formed on the other surface of the insulating substrate. A heater electrode terminal (26) is fixed to the electrode of the heating member through a metal layer (26a). A first grid (30) is fixed to the insulating substrate to oppose the cathode base member through a predetermined space. <IMAGE>