Glass panel for cathode ray tube e.g. for TV broadcasting or industrial equipment

摘要

A face portion (7) is rectangular and has a skirt (6) portion constituting its side wall. A compressive stress sigma c is formed by physically strengthening the outer surface of the face portion, where 7MPa <= sigma c <= 30MPa. The relationship between the radius of curvature Rb of an outer surface of a blend portion (9), connecting the face portion to the skirt portion, in a diagonal portion of the glass panel and the largest outer diameter of the glass panel is Rb/-0.017D+4.0.