| 摘要 |
A shadow mask includes a perforated region in which a plurality of electron beam passage apertures are formed, a non-perforated region on the periphery of the perforated region, and a skirt portion bent to an electron gun side with respect to the non-perforated region. The curved surfaces on an x-axis and a y-axis of the perforated region are convex to a panel side. The perforated region includes a curved surface that is convex to the panel side and a curved surface that is convex to the electron gun side on a periphery of the perforated region. Furthermore, the perforated region has a curved surface that is convex to the panel side and a curved surface that is convex to the electron gun side in a region surrounded by the periphery, the x-axis, and the y-axis. Because of this, the color displacement caused by doming can be reduced while a shadow mask is used which is made of an inexpensive iron material, and in which the increase in the difference in elevation in the z-axis direction between a center portion and a diagonal portion of the perforated region is suppressed.
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