CATHODE-RAY TUBE

PROBLEM TO BE SOLVED: To provide a cathode-ray tube wherein vibration caused by external force or the like, doming, and generation of the second collision of an electron with a phosphor screen are securely cut down with a simple structure. SOLUTION: With applied tensile force in the direction of an arrow 'a', the shadow mask 13 is stretched and retained on the upper surface of a connecting member 11. The mask 13 has a plastic deformation area on the surface thereof, wherein a projection 16 is formed by plastic deformation and the cross sectional form thereof is inverted V shape is lateral direction. As a result of this, the rigidity of the mask is improved with simple construction, so that the shadow mask may become difficult to be bent, therefore the amplitude of the vibration caused by external force, etc., is cut down. Furthermore, the surface area of the shadow mask can be enlarged which enables heat radiation efficiency to increase, thermal expansion to decrease, and doming to be cut down. Additionally this enables to prevent generation of the second collision of an electron reflected by the phosphor screen with the phosphor screen.