GLASS PANEL FOR A CATHODE RAY TUBE

The invention relates to a glass panel ( 2 ) for a cathode ray tube, in particular a real flat panel, comprising a substantially rectangular display window ( 5 ) having an upright edge ( 6 ) along its periphery. The glass panel ( 2 ) meets the following stress distribution criterion: Sicor>Sicf where Sicor is a compressive inside surface stress at a corner ( 19, 20, 21, 22 ) of the display window ( 5 ) and Sicf is a compressive inside surface stress at a center face ( 25 ) of the display window ( 5 ). Preferably, the ratio of Sicor/Sicf is higher than or equal to 1.05 and lower than or equal to 2.0. As a result of this particular stress distribution, the strength and the mechanical safety of the panel ( 2 ) are increased, so that the glass thickness of the panel ( 2 ) and/or thermal processing speeds may be reduced.