Cathode ray tube

摘要

To provide a cathode ray tube stabilizing the potential at an inner wall of a neck, providing stabilized nocking effect by forced discharge among electrodes or the like, promoting the withstand voltage characteristic of an electron gun and preventing deterioration in image quality resulted from straying leakage current, an electron gun where both ends of metal lines are welded to an intermediate electrode and a focus electrode (5-1-th electrode) to surround beading glass and a voltage dividing resistor, is sealed in a neck portion and thereafter, the metal lines are heated by high frequency heating by which a metal film is formed on surfaces of an inner wall of the neck and the voltage dividing resistor and the beading glass.