Patent ID: 7279828

Claim:
A glass panel for use in a cathode ray tube, comprising: a face portion for displaying images; a skirt portion extending from a periphery of the face portion backwards; and a blend radius portion for connecting the face portion and the skirt portion, wherein the face portion includes an effective screen and a wedge portion positioned near a periphery portion of the effective screen, and compressive stress layers are formed on any regions of an inside and an outside surface of the face portion and the skirt portion, and a maximum compressive stress value σFmax of the face portion and a minimum compressive stress value σSmin of the skirt portion satisfy a relationship of σSmin/σFmax <0.5, and wherein an outside surface compressive stress value σWO near the wedge portion and an inside surface maximum compressive stress value σFCImax near the center of the face portion satisfy a relationship of 0.4≦σWO/σFCImax≦1.3.