Cathode ray tube and method for manufacturing the same

摘要

In the present invention, profile lines of plate-like grid electrodes (23) are formed by a first punching step and separation lines of the plate-like grid electrodes are formed by a subsequent punching. An angle of a crossing portion formed by the profile line and the separation line is set to not less than 70 degrees and not more than 110 degrees. Due to such a constitution, burrs on the plate-like grid electrode (23) which constitutes an electron gun (13) of a color cathode ray tube can be reduced so that the quality of the cathode ray tube can be enhanced and the manufacturing time of the cathode ray tube can be shortened.