Patent ID: 7199512

Claim:
A color cathode ray tube comprising: a panel on an inner surface of which a phosphor screen is formed; a funnel joined to the panel; an electron gun generating electron beams; a shadow mask mounted to the panel, the shadow mask having a faceplate portion and a peripheral skirt portion bent back from the faceplate portion and extending a specific length from the faceplate portion; and a frame joined to said shadow mask; wherein a radius of curvature of at least a corner of the peripheral skirt portion of the faceplate portion of said shadow mask is not smaller than 50 mm, the corner of the peripheral skirt portion of the faceplate portion includes a convex portion, and a gap with a substantially constant distance is provided between a corner of the faceplate portion of said shadow mask and a corresponding corner of said frame along substantially the entire specific length of the peripheral skirt portion.