Color cathode ray tube and method of manufacturing the same.

摘要

A shadow mask (26) of a color cathode ray tube has a large number of electron beam apertures (12) through which electron beams emitted from the electron gun pass. Each of the electron beam apertures has a larger opening (42) open to a surface of the shadow mask on a phosphor screen side, and a smaller opening (40) open to a surface of the shadow mask on an electron gun side and communicating with the larger opening. The smaller opening of each of the electron beam apertures located at a peripheral portion of the shadow mask is defined by a wall surface of the shadow mask. The wall surface includes an outward portion (40a) which is located outward in a radial direction with respect to a center of the shadow mask and a central-side portion (40b) which is located on a central side of the shadow mask. An angle ( theta 1) defined by the outward portion and a central axis (40c) of the smaller opening is larger than an angle ( theta 2) defined by the central-side portion and the central axis of the smaller opening. <IMAGE>